{"id":36997,"date":"2026-06-13T02:15:00","date_gmt":"2026-06-13T02:15:00","guid":{"rendered":"https:\/\/dimud.com\/?p=36997"},"modified":"2026-06-08T08:23:30","modified_gmt":"2026-06-08T08:23:30","slug":"guide-to-rubber-injection-molding","status":"publish","type":"post","link":"https:\/\/dimud.com\/es\/guide-to-rubber-injection-molding\/","title":{"rendered":"Rubber Injection Moulding: Complete Process Guide for Engineers and Buyers"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"36997\" class=\"elementor elementor-36997\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-35c0f66 e-flex e-con-boxed e-con e-parent\" data-id=\"35c0f66\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-216c374 elementor-widget elementor-widget-text-editor\" data-id=\"216c374\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">When a product fails in the field \u2014 a sealing gasket that cracks at -40\u00b0C, a medical device grip that deforms under repeated sterilisation, an automotive grommet that leaks after 50,000 km \u2014 the root cause is almost always a mismatch between material selection and moulding process. Rubber injection moulding solves problems that neither rigid plastics nor compression-formed rubber can handle alone, but only when you understand what it actually is, where it works, and where it doesn&#8217;t.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">This guide is written for design engineers, product managers, and sourcing leads who are evaluating rubber injection moulding for a real project \u2014 not for readers who want a glossy overview.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9c53c2a e-flex e-con-boxed e-con e-parent\" data-id=\"9c53c2a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0a13279 elementor-widget elementor-widget-heading\" data-id=\"0a13279\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is Rubber Injection Molding?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9d3fa43 elementor-widget elementor-widget-image\" data-id=\"9d3fa43\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-moulding-process.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-37065\" alt=\"rubber injection moulding process\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-moulding-process.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-moulding-process-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-moulding-process-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-moulding-process-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e780b8 elementor-widget elementor-widget-text-editor\" data-id=\"1e780b8\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Rubber injection moulding is a manufacturing process in which uncured rubber compound is heated, pressurised, and injected into a closed steel mould cavity, where it undergoes <a href=\"https:\/\/en.wikipedia.org\/wiki\/Vulcanization\" rel=\"nofollow noopener\" target=\"_blank\">vulcanisation<\/a> \u2014 a chemical crosslinking reaction triggered by heat \u2014 to produce a finished elastomeric part.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The key word is vulcanisation. This is what makes rubber injection fundamentally different from plastic injection moulding. In plastic moulding, the material melts under heat and solidifies when cooled. In rubber moulding, the opposite thermal logic applies: the material is heated to reduce viscosity for injection, then heated further inside the mould to cure. You&#8217;re not cooling a thermoplastic into shape \u2014 you&#8217;re chemically transforming an elastomer.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">This distinction matters enormously for mould design, machine selection, and process control. A manufacturer that only runs thermoplastics cannot simply &#8220;switch&#8221; to rubber. The equipment, tooling geometry, and process parameters are fundamentally different.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">That said, the term &#8220;rubber injection moulding&#8221; covers a wider family than most buyers realise:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Conventional vulcanised rubber<\/strong> (NBR, EPDM, NR, CR\/Neoprene): true thermoset elastomers requiring cure cycles of 60\u2013180 seconds at 160\u2013200\u00b0C<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Liquid silicone rubber (LSR)<\/strong>: a two-component platinum-catalysed system injected at room temperature into a heated mould; cure times of 15\u201360 seconds; the dominant choice for medical and food-contact applications<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Thermoplastic elastomers (TPE\/TPR)<\/strong>: materials that behave like rubber but process exactly like thermoplastics \u2014 they melt and solidify without chemical crosslinking, allowing standard injection moulding equipment and recyclable scrap<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Understanding which category your application actually requires is the first decision that determines everything else.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-08fd136 e-flex e-con-boxed e-con e-parent\" data-id=\"08fd136\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-49baf58 elementor-widget elementor-widget-heading\" data-id=\"49baf58\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The Rubber Moulding Process: Step by Step<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ef095d6 elementor-widget elementor-widget-text-editor\" data-id=\"ef095d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The rubber moulding process for conventional vulcanised compounds follows this sequence:<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>1. Compound preparation.<\/strong> Raw rubber is mixed with vulcanising agents, accelerators, fillers, and plasticisers in a Banbury mixer or open mill. The compound&#8217;s <a href=\"https:\/\/store.astm.org\/standards\/d1646\" rel=\"nofollow noopener\" target=\"_blank\">Mooney viscosity<\/a> is measured to confirm processability \u2014 typically ML(1+4) 100\u00b0C values between 30 and 80 for injection-grade compounds.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>2. Strip or pellet feeding.<\/strong> Unlike plastic pellets, most rubber compounds are fed into the injection barrel as continuous strips approximately 30\u201335mm wide, or as pre-formed slugs. Strip feeding reduces air entrapment and ensures consistent shot weight.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>3. Barrel heating and plasticisation.<\/strong> A screw or plunger system inside the heated barrel shears and warms the compound. The target barrel temperature is typically 70\u2013100\u00b0C \u2014 warm enough to reduce viscosity for injection, but below the scorch temperature that would trigger premature vulcanisation. This range is narrower than most engineers expect, and maintaining it is non-negotiable.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>4. Injection.<\/strong> The compound is injected through a heated sprue, runner system, and gate into the mould cavity under pressures of 100\u2013200 MPa. Gate design is critical: too small a gate generates excessive shear heat and scorches the compound; too large a gate leaves a significant witness mark requiring post-mould trimming.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>5. Vulcanisation (cure).<\/strong> The mould is held closed under pressure at 160\u2013200\u00b0C for the specified cure time. Heat triggers crosslink formation throughout the part. Under-cure produces soft, sticky parts; over-cure causes brittleness and surface reversion in some compounds. Cure time is a function of part thickness, compound reactivity, and mould temperature \u2014 and must be validated experimentally, not assumed from a datasheet.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>6. Demoulding and deflashing.<\/strong> Because rubber is elastic, ejection forces are lower than for rigid plastics, but mould release agents are commonly required. Flash \u2014 thin fins of excess rubber at the parting line \u2014 is inherent to rubber injection and is removed by cryogenic deflashing, tumbling, or manual trimming depending on part geometry and tolerance requirements.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-51a6dbe e-flex e-con-boxed e-con e-parent\" data-id=\"51a6dbe\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9ecc630 elementor-widget elementor-widget-heading\" data-id=\"9ecc630\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Material Selection: NBR, EPDM, Neoprene, Silicone, and TPE<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f20eae7 elementor-widget elementor-widget-image\" data-id=\"f20eae7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-compound-material-types.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-37068\" alt=\"rubber compound material types\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-compound-material-types.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-compound-material-types-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-compound-material-types-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-compound-material-types-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-033c34d elementor-widget elementor-widget-text-editor\" data-id=\"033c34d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Choosing the wrong rubber compound wastes tooling investment faster than almost any other mistake. Here&#8217;s a practical breakdown of the materials used in injection rubber molding:<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>NBR (Nitrile Butadiene Rubber)<\/strong> \u2014 The default choice for oil and fuel resistance. Automotive hydraulic seals, fuel system components, and O-rings. Operating range approximately -40\u00b0C to +120\u00b0C. Poor ozone and UV resistance; not suitable for outdoor exposure.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>EPDM (Ethylene Propylene Diene Monomer)<\/strong> \u2014 Excellent weathering, ozone, and UV resistance. Automotive door seals, window seals, HVAC gaskets. Good heat resistance to 150\u00b0C continuous. Poor petroleum oil resistance \u2014 do not use in fuel systems.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Neoprene (CR \/ Polychloroprene) injection molding<\/strong> \u2014 The historical workhorse for moderate oil, weather, and flame resistance simultaneously. Wire harness grommets, hose connectors, cable jackets. Less common in new designs as EPDM and NBR cover its key use cases more cost-effectively, but neoprene injection molding remains relevant where balanced resistance profiles are specified.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Silicone rubber injection molding process<\/strong> \u2014 The only compound that maintains flexibility from -60\u00b0C to +230\u00b0C continuously. Required for medical device components, infant products, food-contact seals, and high-temperature automotive sensors. The silicone rubber injection molding process differs depending on whether HTV (high-temperature vulcanising) or LSR is used. LSR dominates high-volume precision applications because it requires no pre-forming and achieves tighter dimensional tolerances. Silicone injection molding tips for LSR: maintain a cold-runner system at 10\u201320\u00b0C to prevent premature cure in the manifold; use static mixers to ensure homogeneous mixing of Part A and Part B immediately before injection.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>TPE\/TPR<\/strong> \u2014 For applications where rubber-like properties are needed but conventional cure chemistry isn&#8217;t required, thermoplastic elastomers are the practical alternative. They can be processed on standard plastic injection moulding machines, generate recyclable scrap, and require no cure time \u2014 cutting cycle times from 120+ seconds to 20\u201340 seconds. Shore hardness from 20A to 70D is achievable. The trade-off: heat resistance is limited to roughly 100\u2013120\u00b0C continuous, and TPE cannot match the compression set performance of a fully vulcanised rubber compound in static sealing applications.<\/p><div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Material<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Temperature Range<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Oil Resistance<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Typical Application<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">NBR<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">-40 to +120\u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Excellent<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Hydraulic seals, O-rings<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">EPDM<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">-50 to +150\u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Poor<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Door\/window seals, weatherstripping<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">CR (Neoprene)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">-40 to +120\u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Moderate<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Grommets, cable jackets<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Silicone (LSR\/HTV)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">-60 to +230\u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Moderate<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Medical, food-contact, sensors<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">TPE<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">-40 to +100\u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Varies by grade<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Consumer electronics, ergonomic grips<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">For a full overview of elastomeric and thermoplastic materials available for injection moulding production, see <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/dimud.com\/materials\/injection-molding-materials\/\">Dimud&#8217;s injection molding materials reference<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0ae2a68 e-flex e-con-boxed e-con e-parent\" data-id=\"0ae2a68\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a89d03d elementor-widget elementor-widget-heading\" data-id=\"a89d03d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Automotive Rubber Injection Molding: What the Industry Actually Demands<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1460f76 elementor-widget elementor-widget-image\" data-id=\"1460f76\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/automotive-rubber-injection-molding.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-37069\" alt=\"automotive rubber injection molding\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/automotive-rubber-injection-molding.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/automotive-rubber-injection-molding-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/automotive-rubber-injection-molding-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/automotive-rubber-injection-molding-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f60c969 elementor-widget elementor-widget-text-editor\" data-id=\"f60c969\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Automotive rubber injection molding is the highest-stakes application of this technology. A door seal that shrinks 0.3mm more than specified causes wind noise complaints. A fuel system O-ring that fails releases hydrocarbons into the engine bay. These aren&#8217;t cosmetic defects.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The automotive sector&#8217;s specific requirements shape mould design and process control in ways that don&#8217;t apply to general industrial moulding:<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Dimensional consistency across cavities.<\/strong> Multi-cavity injection rubber moulds for automotive seals must maintain part weight variation below \u00b10.5% across all cavities. This requires balanced runner systems with precisely machined gate dimensions \u2014 not adjusted empirically on the press floor.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Material traceability.<\/strong> IATF 16949-aligned production requires lot-level traceability of rubber compound. Suppliers must document compound source, Mooney viscosity measurement, and cure characteristics for every production run.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Flash control.<\/strong> Automotive assemblies increasingly use automated assembly robots. Flash on a grommet or seal that exceeds 0.3mm in height will jam a robotic insertion tool. This means the parting line location, vent design, and deflashing method must be specified at the mould design stage \u2014 not corrected after tooling is cut.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>PPAP documentation.<\/strong> Production Part Approval Process (PPAP) submission for automotive rubber injection molded parts typically requires dimensional reports on 30 or more samples, material certifications, capability studies (Cpk \u2265 1.67 for critical dimensions), and MSA data for measuring equipment. Suppliers without in-house metrology capability cannot support this process.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">For automotive buyers evaluating rubber injection molding services, the question isn&#8217;t just &#8220;can you mould this compound?&#8221; \u2014 it&#8217;s &#8220;what does your quality system look like at the process level?&#8221; Explore Dimud&#8217;s <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/dimud.com\/industries\/automotive\/\">automotive injection molding capabilities<\/a> for further detail.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7253570 e-flex e-con-boxed e-con e-parent\" data-id=\"7253570\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-36713a8 elementor-widget elementor-widget-heading\" data-id=\"36713a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Rubber Injection Moulding vs. Compression Moulding: Making the Right Call<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a1d0fe elementor-widget elementor-widget-text-editor\" data-id=\"7a1d0fe\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Most buyers encounter both rubber moulding processes and need a clear decision framework. The answer depends on three variables: annual volume, part complexity, and flash tolerance.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Choose rubber injection moulding when:<\/strong><\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Annual volume exceeds 20,000 parts \u2014 the higher tooling investment amortises quickly against shorter cycle times (60\u2013180 seconds vs. 3\u201310 minutes for compression)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Part geometry includes thin walls, undercuts, or blind holes that compression tooling cannot form consistently<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Flash must be minimal \u2014 injection moulding&#8217;s closed-cavity process generates far less flash than open compression moulds<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Automation is required \u2014 injection rubber moulding machines can run lights-out; compression presses require manual loading<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Choose compression moulding when:<\/strong><\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Volumes are below 5,000 parts annually and tooling cost is the primary concern (compression tools can cost 30\u201350% less)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">The part is thick-section, simple geometry, and cure time is already long \u2014 compression&#8217;s slower cycle is less of a disadvantage<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">The compound is very stiff or high-durometer and doesn&#8217;t flow well under injection pressure<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Prototyping in the final compound is needed before committing to injection tooling<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Transfer moulding<\/strong> sits between the two: the compound is loaded into a pot and transferred under pressure into a closed cavity. It offers better dimensional control than compression at lower tooling cost than full injection tooling, and is often used for insert-loaded parts where the rubber encapsulates a metal component.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-76dac78 e-flex e-con-boxed e-con e-parent\" data-id=\"76dac78\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bbc3860 elementor-widget elementor-widget-heading\" data-id=\"bbc3860\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Injection Moulding Guidelines: Mould Design for Rubber<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d244903 elementor-widget elementor-widget-image\" data-id=\"d244903\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-mould-design.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-37064\" alt=\"rubber injection mould design\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-mould-design.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-mould-design-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-mould-design-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-injection-mould-design-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-842fefd elementor-widget elementor-widget-text-editor\" data-id=\"842fefd\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The following injection molding guidelines apply specifically to rubber and elastomeric materials. Engineers who design only thermoplastic tooling will encounter rubber-specific failures if they apply standard plastic design rules.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Wall thickness:<\/strong> Minimum 1.5mm for most vulcanised compounds; thinner sections risk incomplete cure and poor mechanical properties. Unlike plastic, rubber doesn&#8217;t have a strict maximum wall thickness \u2014 but sections above 15mm will have significant core-surface cure time differentials that must be accommodated in the cure cycle.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Draft angles:<\/strong> 3\u20135\u00b0 minimum for interior walls; 5\u20138\u00b0 for deep features. Rubber&#8217;s elasticity allows it to stretch off shallow drafts that would lock a rigid plastic part, but insufficient draft generates surface tearing on high-durometer compounds.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Venting:<\/strong> Inadequate venting causes burn marks and short shots in rubber, as in plastic \u2014 but the cure chemistry makes venting more critical. Trapped air doesn&#8217;t just cause a cosmetic defect; it can inhibit vulcanisation at the void, leaving a soft uncured pocket inside an otherwise acceptable-looking part.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Gate location:<\/strong> Place gates at the thickest section and farthest from critical sealing faces. Weld lines in vulcanised rubber are genuine mechanical weakness points \u2014 the crosslink density at the weld is lower than in the bulk material.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Runner system temperature:<\/strong> For conventional rubber, runners are kept at barrel temperature (70\u2013100\u00b0C). For LSR, a cold-runner system is mandatory to prevent premature cure in the manifold. This is the most common error in LSR tooling designed by shops without LSR-specific experience.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7daeda0 e-flex e-con-boxed e-con e-parent\" data-id=\"7daeda0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a2804a4 elementor-widget elementor-widget-heading\" data-id=\"a2804a4\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Injection Rubber Moulding Machines: What to Know Before Quoting<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-080d618 elementor-widget elementor-widget-text-editor\" data-id=\"080d618\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Injection rubber moulding machines differ from standard thermoplastic machines in several respects. Specifying the right machine type affects cycle time, flash levels, and achievable tolerances \u2014 which is why buyers should understand the basics when evaluating rubber injection molding services.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Screw geometry:<\/strong> Rubber screws have lower compression ratios (1.2:1 to 1.5:1 vs. 2:1\u20133:1 for plastic) to minimise shear heat and avoid premature vulcanisation. Using a standard plastic screw on rubber will scorch the compound.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Clamping force:<\/strong> Because rubber is injected at high viscosity and relatively low injection pressure (compared to engineering plastics), clamping force requirements are lower. A 200-tonne machine handles many rubber applications that would need 400 tonnes for an equivalent rigid plastic part.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Shot size:<\/strong> Rubber machines are calibrated by shot weight in grams of rubber compound, not shot volume in cm\u00b3. Compound density varies, so shot weight must be verified for each new compound.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>LSR-specific machines:<\/strong> The silicone rubber injection molding process for LSR requires a dosing pump system that meters Part A and Part B at a 1:1 ratio, a static mixer, and a cold-runner injection unit. These are purpose-built additions; standard rubber injection moulding machines cannot run LSR without significant modification.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c440e14 e-flex e-con-boxed e-con e-parent\" data-id=\"c440e14\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bc552e2 elementor-widget elementor-widget-heading\" data-id=\"bc552e2\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Rubber Molding Processes Capabilities: Where Each Method Fits<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-414d6c7 elementor-widget elementor-widget-image\" data-id=\"414d6c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-molding-process-comparison.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-37066\" alt=\"rubber molding process comparison\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-molding-process-comparison.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-molding-process-comparison-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-molding-process-comparison-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/rubber-molding-process-comparison-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-acba00a elementor-widget elementor-widget-text-editor\" data-id=\"acba00a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Understanding rubber molding processes capabilities across different production scenarios helps buyers make accurate tooling investment decisions before committing budget.<\/p><div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Process<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Tooling Cost<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Cycle Time<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Flash Level<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Ideal Volume<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Rubber injection moulding<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">High ($5K\u2013$30K+)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">60\u2013180 sec<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Low<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">20,000+ parts\/yr<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Compression moulding<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Low ($1K\u2013$8K)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">3\u201310 min<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">High<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Under 5,000 parts\/yr<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Transfer moulding<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Medium ($3K\u2013$15K)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">2\u20135 min<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Medium<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">5,000\u201320,000 parts\/yr<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">LSR injection<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">High ($8K\u2013$40K+)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">15\u201360 sec<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Very low<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">50,000+ parts\/yr<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">TPE injection<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Medium ($3K\u2013$15K)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">20\u201340 sec<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Low<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">10,000+ parts\/yr<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The table above is a planning tool, not a fixed rule. Part complexity, compound viscosity, and deflashing cost all affect where the crossover point falls for a specific project.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e46fd05 e-flex e-con-boxed e-con e-parent\" data-id=\"e46fd05\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-952ebc2 elementor-widget elementor-widget-heading\" data-id=\"952ebc2\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Rubber Plastic Molding: Opening New Design Space<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-39b283b elementor-widget elementor-widget-text-editor\" data-id=\"39b283b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Rubber plastic molding \u2014 producing a single component that integrates both rigid plastic structure and elastomeric function \u2014 is where injection moulding technology delivers outcomes no other process can match. The two main routes are overmoulding and insert moulding.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">In overmoulding, a rigid plastic substrate is first moulded, then placed in a second mould tool where TPE or LSR is injected over it. The result is a single integrated component: a power tool grip bonded to a nylon core, a medical device housing with an integrated soft-touch seal, a waterproof electronic enclosure with moulded-in cable strain relief.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">In insert moulding, metal or plastic inserts are loaded into the rubber mould before injection. The rubber encapsulates the insert during cure, forming a permanent mechanical and sometimes chemical bond. This is how automotive engine mounts are made \u2014 a steel housing encapsulated in NBR that provides both load-bearing structure and vibration isolation.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Both processes eliminate secondary bonding operations, adhesive application, and the quality risk of manual assembly. Dimud&#8217;s <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/dimud.com\/services\/injection-molding-services\/overmolding\/\">overmolding services<\/a> and <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/dimud.com\/services\/injection-molding-services\/liquid-silicone-rubber-injection-molding\/\">liquid silicone rubber injection molding<\/a> capabilities are available as part of a fully integrated manufacturing workflow \u2014 from DFM analysis through to production tooling and quality-controlled mass production.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3ca1e1f e-flex e-con-boxed e-con e-parent\" data-id=\"3ca1e1f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6950695 elementor-widget elementor-widget-heading\" data-id=\"6950695\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Common Defects in Injection Moulded Rubber Parts and Their Root Causes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-102bf5b elementor-widget elementor-widget-text-editor\" data-id=\"102bf5b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Short shot (incomplete fill):<\/strong> Compound viscosity too high at injection temperature; injection pressure insufficient; gates undersized; excessive scorch causing compound to partially cure in the runner. Solution: raise barrel temperature 5\u201310\u00b0C, verify screw speed, widen gate.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Excessive flash:<\/strong> Mould clamping force insufficient relative to injection pressure; worn parting line; compound viscosity too low (over-heated barrel). Flash in rubber is more forgiving than in plastic \u2014 elasticity means parts can often be deflashed without dimensional damage \u2014 but controlling it at the tooling stage is always preferable.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Blistering or porosity:<\/strong> Trapped air from inadequate venting; moisture contamination in the compound; excessive barrel temperature generating volatiles. Compound should be stored sealed below 25\u00b0C; vent channels should be cleaned before every production run.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Under-cure (soft, tacky parts):<\/strong> Cure time too short; mould temperature below setpoint; inhibition of platinum catalyst in LSR from contact with sulphur-containing contamination (amine mould releases, latex gloves). In LSR processing, cure inhibition from contamination is a far more common failure mode than most buyers expect.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Shrinkage and dimensional deviation:<\/strong> Rubber shrinks significantly more than rigid plastic \u2014 typically 1.5\u20133% depending on compound and cure conditions. This must be designed into the mould dimensions from the start. Post-mould dimensional verification on first-article samples before production approval is not optional.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4931e1f e-flex e-con-boxed e-con e-parent\" data-id=\"4931e1f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-04564d1 elementor-widget elementor-widget-heading\" data-id=\"04564d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Working with Dimud: Integrated Manufacturing from DFM to Delivery<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4e07ca9 elementor-widget elementor-widget-image\" data-id=\"4e07ca9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-rubber-injection-molding-services.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-37067\" alt=\"Dimud rubber injection molding services\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-rubber-injection-molding-services.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-rubber-injection-molding-services-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-rubber-injection-molding-services-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-rubber-injection-molding-services-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ba7f77 elementor-widget elementor-widget-text-editor\" data-id=\"8ba7f77\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/dimud.com\">Dimud<\/a> operates three manufacturing facilities covering mould engineering, CNC machining, and injection production. For customers with rubber or elastomeric component requirements, this means the DFM analysis, tooling design, and production run happen in a coordinated workflow \u2014 not handed off between separate vendors.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Our engineering team evaluates material selection (including whether LSR, TPE, or conventional rubber best fits your application), performs gate and runner analysis before tooling is cut, and delivers first-article inspection reports with full dimensional traceability. For engineers who have encountered quality or delivery failures with multi-supplier rubber moulding supply chains, consolidating into a single manufacturing partner with in-house tooling and process control changes the reliability picture significantly.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Explore Dimud&#8217;s full <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/dimud.com\/services\/injection-molding-services\/\">injection moulding services<\/a> \u2014 or contact us directly with your part drawings and application requirements.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ebae0fb e-flex e-con-boxed e-con e-parent\" data-id=\"ebae0fb\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9f1593a elementor-widget elementor-widget-heading\" data-id=\"9f1593a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQ<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9079fbc elementor-widget elementor-widget-elementskit-accordion\" data-id=\"9079fbc\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-accordion.default\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" >\n        <div class=\"elementskit-accordion accoedion-primary\" id=\"accordion-6a2ce7dcc6e4e\">\n\n            \n                <div class=\"elementskit-card active\">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-0-9079fbc\">\n                        <a href=\"#collapse-95eb0256a2ce7dcc6e4e\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-95eb0256a2ce7dcc6e4e\" aria-expanded=\"true\" aria-controls=\"Collapse-95eb0256a2ce7dcc6e4e\">\n                            \n                            <span class=\"ekit-accordion-title\">Can you injection mold rubber?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-95eb0256a2ce7dcc6e4e\" class=\" show collapse\" aria-labelledby=\"primaryHeading-0-9079fbc\" data-parent=\"#accordion-6a2ce7dcc6e4e\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>Yes. Rubber injection moulding has been in industrial production since the 1960s. Conventional vulcanised rubbers (NBR, EPDM, neoprene), liquid silicone rubber, and thermoplastic elastomers can all be injection moulded \u2014 but each requires different equipment and process parameters. Not every injection moulder can run all three; verify the specific capability before committing tooling.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-1-9079fbc\">\n                        <a href=\"#collapse-17fc3826a2ce7dcc6e4e\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-17fc3826a2ce7dcc6e4e\" aria-expanded=\"false\" aria-controls=\"Collapse-17fc3826a2ce7dcc6e4e\">\n                            \n                            <span class=\"ekit-accordion-title\">What is the difference between rubber injection moulding and compression moulding?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-17fc3826a2ce7dcc6e4e\" class=\" collapse\" aria-labelledby=\"primaryHeading-1-9079fbc\" data-parent=\"#accordion-6a2ce7dcc6e4e\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p><br \/>In injection moulding, pre-heated compound is injected under pressure into a closed cavity \u2014 offering shorter cycle times, less flash, and better repeatability at high volumes. Compression moulding places a pre-weighed charge in an open mould and closes it under press force \u2014 simpler tooling, lower cost for low volumes, but slower and more flash-prone.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-2-9079fbc\">\n                        <a href=\"#collapse-ddba14b6a2ce7dcc6e4e\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-ddba14b6a2ce7dcc6e4e\" aria-expanded=\"false\" aria-controls=\"Collapse-ddba14b6a2ce7dcc6e4e\">\n                            \n                            <span class=\"ekit-accordion-title\">How long does vulcanisation take in rubber injection moulding?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-ddba14b6a2ce7dcc6e4e\" class=\" collapse\" aria-labelledby=\"primaryHeading-2-9079fbc\" data-parent=\"#accordion-6a2ce7dcc6e4e\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p><br \/>Typical cure times range from 60 to 180 seconds for conventional rubber compounds at 160\u2013200\u00b0C mould temperature. LSR cure times are shorter \u2014 15 to 60 seconds \u2014 due to the platinum-catalysed reaction mechanism. TPE has no cure step; cycle time is controlled by cooling, typically 20\u201340 seconds.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-3-9079fbc\">\n                        <a href=\"#collapse-b509ef36a2ce7dcc6e4e\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-b509ef36a2ce7dcc6e4e\" aria-expanded=\"false\" aria-controls=\"Collapse-b509ef36a2ce7dcc6e4e\">\n                            \n                            <span class=\"ekit-accordion-title\">What causes flash in injection moulded rubber parts?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-b509ef36a2ce7dcc6e4e\" class=\" collapse\" aria-labelledby=\"primaryHeading-3-9079fbc\" data-parent=\"#accordion-6a2ce7dcc6e4e\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>Flash results from compound flowing into the parting line gap before the mould clamps fully, from insufficient clamping force, or from a worn mould parting surface. Cryogenic deflashing is the standard post-process solution for precision parts.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-4-9079fbc\">\n                        <a href=\"#collapse-0dc2c296a2ce7dcc6e4e\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-0dc2c296a2ce7dcc6e4e\" aria-expanded=\"false\" aria-controls=\"Collapse-0dc2c296a2ce7dcc6e4e\">\n                            \n                            <span class=\"ekit-accordion-title\">Is neoprene suitable for injection moulding?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-0dc2c296a2ce7dcc6e4e\" class=\" collapse\" aria-labelledby=\"primaryHeading-4-9079fbc\" data-parent=\"#accordion-6a2ce7dcc6e4e\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>Yes, neoprene injection molding is technically feasible. CR compounds can be processed on standard rubber injection machines. The main consideration is scorch sensitivity \u2014 CR accelerates faster than NBR or EPDM at elevated temperatures, requiring tighter barrel temperature control and shorter dwell times.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-5-9079fbc\">\n                        <a href=\"#collapse-8183fa76a2ce7dcc6e4e\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-8183fa76a2ce7dcc6e4e\" aria-expanded=\"false\" aria-controls=\"Collapse-8183fa76a2ce7dcc6e4e\">\n                            \n                            <span class=\"ekit-accordion-title\">What is the minimum order quantity for rubber injection moulded parts?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-8183fa76a2ce7dcc6e4e\" class=\" collapse\" aria-labelledby=\"primaryHeading-5-9079fbc\" data-parent=\"#accordion-6a2ce7dcc6e4e\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>Tooling cost is the primary barrier for low volumes. A simple rubber injection mould typically costs $3,000\u2013$15,000 USD depending on cavitation and complexity. For volumes below 5,000 parts, compression or transfer moulding often provides a better cost structure. Rapid aluminium tooling can reduce entry cost for evaluation quantities.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-6-9079fbc\">\n                        <a href=\"#collapse-452cb996a2ce7dcc6e4e\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-452cb996a2ce7dcc6e4e\" aria-expanded=\"false\" aria-controls=\"Collapse-452cb996a2ce7dcc6e4e\">\n                            \n                            <span class=\"ekit-accordion-title\">What rubber injection molding machines are used for LSR?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-452cb996a2ce7dcc6e4e\" class=\" collapse\" aria-labelledby=\"primaryHeading-6-9079fbc\" data-parent=\"#accordion-6a2ce7dcc6e4e\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>LSR requires purpose-built cold-runner injection units with integrated dosing pumps for Part A and Part B at a 1:1 ratio. Standard rubber injection moulding machines cannot run LSR without these modifications. When sourcing LSR parts, confirm the supplier has dedicated LSR equipment \u2014 not a converted conventional rubber press.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                                                        <script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Can you injection mold rubber?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Yes. Rubber injection moulding has been in industrial production since the 1960s. Conventional vulcanised rubbers (NBR, EPDM, neoprene), liquid silicone rubber, and thermoplastic elastomers can all be injection moulded \u2014 but each requires different equipment and process parameters. Not every injection moulder can run all three; verify the specific capability before committing tooling.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between rubber injection moulding and compression moulding?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p><br \/>In injection moulding, pre-heated compound is injected under pressure into a closed cavity \u2014 offering shorter cycle times, less flash, and better repeatability at high volumes. Compression moulding places a pre-weighed charge in an open mould and closes it under press force \u2014 simpler tooling, lower cost for low volumes, but slower and more flash-prone.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"How long does vulcanisation take in rubber injection moulding?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p><br \/>Typical cure times range from 60 to 180 seconds for conventional rubber compounds at 160\u2013200\u00b0C mould temperature. LSR cure times are shorter \u2014 15 to 60 seconds \u2014 due to the platinum-catalysed reaction mechanism. TPE has no cure step; cycle time is controlled by cooling, typically 20\u201340 seconds.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"What causes flash in injection moulded rubber parts?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Flash results from compound flowing into the parting line gap before the mould clamps fully, from insufficient clamping force, or from a worn mould parting surface. Cryogenic deflashing is the standard post-process solution for precision parts.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"Is neoprene suitable for injection moulding?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Yes, neoprene injection molding is technically feasible. CR compounds can be processed on standard rubber injection machines. The main consideration is scorch sensitivity \u2014 CR accelerates faster than NBR or EPDM at elevated temperatures, requiring tighter barrel temperature control and shorter dwell times.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"What is the minimum order quantity for rubber injection moulded parts?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Tooling cost is the primary barrier for low volumes. A simple rubber injection mould typically costs $3,000\u2013$15,000 USD depending on cavitation and complexity. For volumes below 5,000 parts, compression or transfer moulding often provides a better cost structure. Rapid aluminium tooling can reduce entry cost for evaluation quantities.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"What rubber injection molding machines are used for LSR?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>LSR requires purpose-built cold-runner injection units with integrated dosing pumps for Part A and Part B at a 1:1 ratio. Standard rubber injection moulding machines cannot run LSR without these modifications. When sourcing LSR parts, confirm the supplier has dedicated LSR equipment \u2014 not a converted conventional rubber press.<\/p>\"}}]}<\/script>\n                                <\/div>\n    <\/div>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-397813f e-flex e-con-boxed e-con e-parent\" data-id=\"397813f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c97edb5 elementor-widget elementor-widget-heading\" data-id=\"c97edb5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Final Thoughts<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d49da6 elementor-widget elementor-widget-text-editor\" data-id=\"7d49da6\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Rubber injection moulding is not a commodity process. The gap between a supplier who understands compound rheology, vulcanisation chemistry, and mould thermal management \u2014 and one who simply has a press and a heat source \u2014 shows up in dimensional consistency, flash rates, and first-article failure rates.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The materials are demanding. The process windows are narrow. The tooling requires rubber-specific engineering knowledge that doesn&#8217;t transfer directly from plastic mould design. For applications in automotive, medical, or industrial sealing where component failure has real consequences, that knowledge gap matters.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">If you&#8217;re evaluating rubber injection molding services for an upcoming project, the right starting point is a DFM review with a manufacturer who has run the specific compound you&#8217;re considering. Contact Dimud&#8217;s engineering team with your part geometry and application requirements \u2014 and we&#8217;ll tell you exactly what we can and can&#8217;t do.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>When a product fails in the field \u2014 a sealing gasket that cracks at -40\u00b0C, a medical device grip that deforms under repeated sterilisation, an automotive grommet that leaks after 50,000 km \u2014 the root cause is almost always a mismatch between material selection and moulding process. Rubber injection moulding solves problems that neither rigid [&hellip;]<\/p>\n","protected":false},"author":28,"featured_media":37065,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[97,115],"tags":[],"class_list":["post-36997","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide","category-blog"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/posts\/36997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/comments?post=36997"}],"version-history":[{"count":10,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/posts\/36997\/revisions"}],"predecessor-version":[{"id":37075,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/posts\/36997\/revisions\/37075"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/media\/37065"}],"wp:attachment":[{"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/media?parent=36997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/categories?post=36997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/tags?post=36997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}