{"id":10913,"date":"2026-08-14T01:06:54","date_gmt":"2026-08-14T01:06:54","guid":{"rendered":"https:\/\/www.lyasilicone.com\/?p=10913"},"modified":"2026-08-14T01:06:54","modified_gmt":"2026-08-14T01:06:54","slug":"silicone-undercut-demolding-design-guide","status":"publish","type":"post","link":"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/","title":{"rendered":"How Should Undercuts and Demolding Be Designed for Custom Silicone Products?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_73 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Inhalt<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#What_Is_an_Undercut_in_a_Silicone_Product\" title=\"What Is an Undercut in a Silicone Product?\">What Is an Undercut in a Silicone Product?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#Which_Product_Features_Create_Demolding_Risk\" title=\"Which Product Features Create Demolding Risk?\">Which Product Features Create Demolding Risk?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#Why_Is_Demolding_Direction_Important\" title=\"Why Is Demolding Direction Important?\">Why Is Demolding Direction Important?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#Does_Silicone_Hardness_Affect_Demolding\" title=\"Does Silicone Hardness Affect Demolding?\">Does Silicone Hardness Affect Demolding?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#Can_Draft_Help_Silicone_Demolding\" title=\"Can Draft Help Silicone Demolding?\">Can Draft Help Silicone Demolding?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#When_Is_a_More_Complex_Mold_Structure_Needed\" title=\"When Is a More Complex Mold Structure Needed?\">When Is a More Complex Mold Structure Needed?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#Why_Can_a_Sample_Demold_Well_but_Mass_Production_Still_Have_Problems\" title=\"Why Can a Sample Demold Well but Mass Production Still Have Problems?\">Why Can a Sample Demold Well but Mass Production Still Have Problems?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#What_Should_Buyers_Check_During_Sample_Approval\" title=\"What Should Buyers Check During Sample Approval?\">What Should Buyers Check During Sample Approval?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#Undercut_and_Demolding_DFM_Checklist\" title=\"Undercut and Demolding DFM Checklist\">Undercut and Demolding DFM Checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#How_LYA_Silicone_Supports_Demolding_DFM_Review\" title=\"How LYA Silicone Supports Demolding DFM Review\">How LYA Silicone Supports Demolding DFM Review<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#Frequently_Asked_Questions\" title=\"Frequently Asked Questions\">Frequently Asked Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.lyasilicone.com\/de\/silicone-undercut-demolding-design-guide\/#Design_the_Product_for_Both_Use_and_Manufacturing\" title=\"Design the Product for Both Use and Manufacturing\">Design the Product for Both Use and Manufacturing<\/a><\/li><\/ul><\/nav><\/div>\n<h3>Answer Excerpt<\/h3>\n<p class=\"isSelectedEnd\">Undercuts can be used in <a href=\"https:\/\/www.lyasilicone.com\/de\/\"><strong>individuelle Silikonprodukte<\/strong><\/a> because cured silicone is flexible, but the product still needs a controlled demolding path. Deep undercuts, narrow openings, sharp textures, thin sections and locking structures can increase stretching during mold release. Buyers should review demolding direction, material flexibility, tear-sensitive areas and mold structure during DFM before tooling and validate the final design with production-intent samples.<\/p>\n<p class=\"isSelectedEnd\">Silicone allows product designers to create structures that would be difficult to remove from a rigid mold if the product were made from a much less flexible material.<\/p>\n<p class=\"isSelectedEnd\">However, flexibility does not mean that every undercut can be removed safely.<\/p>\n<p class=\"isSelectedEnd\">A silicone product may technically come out of the mold but still create production problems such as:<\/p>\n<ul data-spread=\"false\">\n<li>Product tearing<\/li>\n<li>White stress marks<\/li>\n<li>Thin-edge damage<\/li>\n<li>Permanent deformation<\/li>\n<li>Distorted holes<\/li>\n<li>Damaged texture<\/li>\n<li>Slow manual demolding<\/li>\n<li>Different results between operators<\/li>\n<li>High scrap rates<\/li>\n<li>Longer production cycles<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">Your existing mold-development checklist already identifies deep undercuts, narrow openings, internal locking structures and sharp textures as areas that need demolding review before tooling.<\/p>\n<p class=\"isSelectedEnd\">For OEM buyers, the question should therefore not only be:<\/p>\n<blockquote>\n<p class=\"isSelectedEnd\">Can this shape be molded?<\/p>\n<\/blockquote>\n<p class=\"isSelectedEnd\">A better question is:<\/p>\n<blockquote>\n<p class=\"isSelectedEnd\">Can this product be removed from the mold repeatedly without damaging the part or making mass production unstable?<\/p>\n<\/blockquote>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_an_Undercut_in_a_Silicone_Product\"><\/span>What Is an Undercut in a Silicone Product?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">An undercut is a feature that prevents a molded product from moving directly out of the mold along a simple straight release direction.<\/p>\n<p class=\"isSelectedEnd\">Common examples include:<\/p>\n<ul data-spread=\"false\">\n<li>Internal lips<\/li>\n<li>Reverse hooks<\/li>\n<li>Deep grooves<\/li>\n<li>Narrow necks<\/li>\n<li>Closed openings<\/li>\n<li>Ring structures<\/li>\n<li>Deep recessed textures<\/li>\n<li>Side-facing details<\/li>\n<li>Locking ribs<\/li>\n<li>Structures wider behind a narrow opening<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">A simple flat silicone mat may have very little undercut.<\/p>\n<p class=\"isSelectedEnd\">A ring-shaped teether with internal openings, raised chewing textures and narrow connecting sections can contain several features that stretch significantly during demolding.<\/p>\n<p class=\"isSelectedEnd\">Silicone flexibility may allow some of these features to release without complex mechanical mold actions, but the amount of deformation still needs to remain within a practical range for the selected material and structure.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Which_Product_Features_Create_Demolding_Risk\"><\/span>Which Product Features Create Demolding Risk?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3>1. Narrow Openings<\/h3>\n<p class=\"isSelectedEnd\">A product may contain a large internal feature behind a smaller opening.<\/p>\n<p class=\"isSelectedEnd\">During demolding, the larger feature must pass through the narrow opening.<\/p>\n<p class=\"isSelectedEnd\">This causes the surrounding silicone to stretch.<\/p>\n<p class=\"isSelectedEnd\">Examples include:<\/p>\n<ul data-spread=\"false\">\n<li>Ring handles<\/li>\n<li>Finger holes<\/li>\n<li>Teether openings<\/li>\n<li>Flexible covers<\/li>\n<li>Internal retention lips<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">If the remaining silicone around the opening is too thin, repeated stretching during demolding may create tears or permanent distortion.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h3>2. Deep Raised Textures<\/h3>\n<p class=\"isSelectedEnd\">Raised textures are common on:<\/p>\n<ul data-spread=\"false\">\n<li>Baby-Bei\u00dfringe<\/li>\n<li>Pet chew products<\/li>\n<li>Sensory toys<\/li>\n<li>Grooming products<\/li>\n<li>Grip surfaces<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">The deeper and more complex the texture becomes, the more the product may need to stretch or peel away from the corresponding mold feature.<\/p>\n<p class=\"isSelectedEnd\">Textures with sharp roots or narrow spaces can also increase local stress.<\/p>\n<p class=\"isSelectedEnd\">For a <a href=\"https:\/\/www.lyasilicone.com\/de\/produkt\/custom-silicone-baby-teether-oem-manufacturer\/\"><strong>silicone baby teether<\/strong><\/a>, raised dots, waves and ridges may provide the intended surface structure, but their root geometry and demolding direction should be reviewed before the mold is cut. LYA&#8217;s current teether product range supports custom shapes, textures and mold development, making this a practical DFM issue for private-label projects.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h3>3. Internal Locking Structures<\/h3>\n<p class=\"isSelectedEnd\">Some silicone products use flexible internal lips or snap-fit structures to:<\/p>\n<ul data-spread=\"false\">\n<li>Hold a lid<\/li>\n<li>Retain another component<\/li>\n<li>Create an assembly connection<\/li>\n<li>Prevent a component from sliding out<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">These features may work well during final use but create difficult mold release.<\/p>\n<p class=\"isSelectedEnd\">The designer needs to consider two different movements:<\/p>\n<ol start=\"1\" data-spread=\"false\">\n<li>How the finished product will assemble with its matching component<\/li>\n<li>How the silicone part itself will leave the manufacturing mold<\/li>\n<\/ol>\n<p class=\"isSelectedEnd\">A structure that works perfectly during assembly may still be unsuitable for efficient production if the demolding path requires excessive stretching.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h3>4. Thin Sections Beside an Undercut<\/h3>\n<p class=\"isSelectedEnd\">Undercuts become more risky when the surrounding material is thin.<\/p>\n<p class=\"isSelectedEnd\">High-risk combinations include:<\/p>\n<ul data-spread=\"false\">\n<li>A narrow hole beside a thin outer edge<\/li>\n<li>A deep texture on a thin wall<\/li>\n<li>A locking lip connected by a narrow neck<\/li>\n<li>A handle opening with very little surrounding material<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">The product may stretch successfully several times during sampling but develop inconsistent damage when repeated across thousands of production cycles.<\/p>\n<p class=\"isSelectedEnd\">DFM should therefore evaluate undercut depth together with wall thickness and tear-sensitive geometry.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-medium wp-image-10918\" src=\"https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-undercut-demolding-risk.jpg-300x300.jpg\" alt=\"Silicone teether undercut and demolding risk areas\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-undercut-demolding-risk.jpg-300x300.jpg 300w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-undercut-demolding-risk.jpg-150x150.jpg 150w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-undercut-demolding-risk.jpg-768x768.jpg 768w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-undercut-demolding-risk.jpg-12x12.jpg 12w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-undercut-demolding-risk.jpg-600x600.jpg 600w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-undercut-demolding-risk.jpg-100x100.jpg 100w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-undercut-demolding-risk.jpg.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Why_Is_Demolding_Direction_Important\"><\/span>Why Is Demolding Direction Important?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">Demolding direction determines how the finished product moves away from the mold surfaces.<\/p>\n<p class=\"isSelectedEnd\">A good release direction minimizes unnecessary:<\/p>\n<ul data-spread=\"false\">\n<li>Stretching<\/li>\n<li>Twisting<\/li>\n<li>Peeling<\/li>\n<li>Pulling<\/li>\n<li>Local deformation<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">Consider a textured silicone ring.<\/p>\n<p class=\"isSelectedEnd\">If the product can release mostly along the natural direction of the texture, the required deformation may be relatively controlled.<\/p>\n<p class=\"isSelectedEnd\">If the same texture locks sideways behind a mold feature, the product may need to stretch significantly before release.<\/p>\n<p class=\"isSelectedEnd\">The manufacturer should identify the main release direction during <a href=\"https:\/\/www.lyasilicone.com\/de\/custom-silicone-mold-development-checklist\/\"><strong>custom silicone mold development<\/strong><\/a>, not after the first tool has already been machined. Your current mold checklist similarly recommends confirming the primary demolding direction, undercut depth, product stretching and whether inserts are needed before tooling.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Does_Silicone_Hardness_Affect_Demolding\"><\/span>Does Silicone Hardness Affect Demolding?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">Yes, but hardness should not be evaluated alone.<\/p>\n<p class=\"isSelectedEnd\">A softer silicone may deform more easily during removal, while a firmer structure may resist distortion but require greater force to pass over an undercut.<\/p>\n<p class=\"isSelectedEnd\">Demolding behavior also depends on:<\/p>\n<ul data-spread=\"false\">\n<li>Elongation<\/li>\n<li>Tear resistance<\/li>\n<li>Wall thickness<\/li>\n<li>Product geometry<\/li>\n<li>Texture<\/li>\n<li>Undercut depth<\/li>\n<li>Mold surface<\/li>\n<li>Release path<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">For this reason, <a href=\"https:\/\/www.lyasilicone.com\/de\/how-to-choose-silicone-hardness-custom-products\/\"><strong>Shore A hardness<\/strong><\/a> should be reviewed together with the complete molded structure.<\/p>\n<p class=\"isSelectedEnd\">Changing hardness after tooling can also change product flexibility, dimensions, suction, folding and demolding behavior, which is why material and hardness should ideally be confirmed before final mold approval.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Can_Draft_Help_Silicone_Demolding\"><\/span>Can Draft Help Silicone Demolding?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">Draft is a slight taper applied to a wall or feature to help the product separate from the mold.<\/p>\n<p class=\"isSelectedEnd\">Silicone may tolerate less conventional geometry than many rigid products because it can flex during release, but this does not mean draft can always be ignored.<\/p>\n<p class=\"isSelectedEnd\">Draft can be particularly useful around:<\/p>\n<ul data-spread=\"false\">\n<li>Deep walls<\/li>\n<li>Textures<\/li>\n<li>Ribs<\/li>\n<li>Logo features<\/li>\n<li>Internal cavities<\/li>\n<li>Tall protrusions<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">The required geometry depends on the actual material, surface finish, feature depth and mold design.<\/p>\n<p class=\"isSelectedEnd\">Avoid using one universal draft value for every silicone product.<\/p>\n<p class=\"isSelectedEnd\">The correct approach is to evaluate whether the selected feature can release consistently without damaging either the product or the intended surface finish.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"When_Is_a_More_Complex_Mold_Structure_Needed\"><\/span>When Is a More Complex Mold Structure Needed?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">Not every undercut should be solved by stretching the silicone.<\/p>\n<p class=\"isSelectedEnd\">Depending on the product, the mold may require:<\/p>\n<ul data-spread=\"false\">\n<li>Removable inserts<\/li>\n<li>Multi-part mold construction<\/li>\n<li>Split cores<\/li>\n<li>Special core geometry<\/li>\n<li>Manual inserts<\/li>\n<li>Other controlled mold-release solutions<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">A more complex mold can increase:<\/p>\n<ul data-spread=\"false\">\n<li>Tooling cost<\/li>\n<li>Mold-maintenance requirements<\/li>\n<li>Production steps<\/li>\n<li>Operator involvement<\/li>\n<li>Cycle time<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">Therefore, the engineering team should compare two options:<\/p>\n<p class=\"isSelectedEnd\"><strong>Option A:<\/strong> Simplify the product geometry.<\/p>\n<p class=\"isSelectedEnd\"><strong>Option B:<\/strong> Keep the product design and accept a more complex mold.<\/p>\n<p class=\"isSelectedEnd\">The better choice depends on how important the feature is to product function and brand differentiation.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Why_Can_a_Sample_Demold_Well_but_Mass_Production_Still_Have_Problems\"><\/span>Why Can a Sample Demold Well but Mass Production Still Have Problems?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">Engineering samples are usually produced in small quantities.<\/p>\n<p class=\"isSelectedEnd\">A technician may carefully remove each part by hand.<\/p>\n<p class=\"isSelectedEnd\">Mass production is different.<\/p>\n<p class=\"isSelectedEnd\">Operators need a repeatable method across:<\/p>\n<ul data-spread=\"false\">\n<li>Hundreds or thousands of parts<\/li>\n<li>Multiple mold cavities<\/li>\n<li>Different shifts<\/li>\n<li>Longer production runs<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">A structure that requires one specific technician to carefully twist and pull every product may not be a stable production design.<\/p>\n<p class=\"isSelectedEnd\">Possible mass-production problems include:<\/p>\n<ul data-spread=\"false\">\n<li>Different pulling force between operators<\/li>\n<li>Torn thin areas<\/li>\n<li>Distorted holes<\/li>\n<li>Slow output<\/li>\n<li>Inconsistent product shape<\/li>\n<li>Higher rejection rate<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">Demolding should therefore be evaluated during pilot production, not only on one successful first sample. LYA&#8217;s current mold-development process also recommends pilot production to validate mold-cavity differences, handling and production stability before full production.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Should_Buyers_Check_During_Sample_Approval\"><\/span>What Should Buyers Check During Sample Approval?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3>Check the Product Immediately After Demolding<\/h3>\n<p class=\"isSelectedEnd\">Inspect:<\/p>\n<ul data-spread=\"false\">\n<li>Holes<\/li>\n<li>Thin edges<\/li>\n<li>Texture roots<\/li>\n<li>Internal lips<\/li>\n<li>Narrow necks<\/li>\n<li>Handles<\/li>\n<li>Logos<\/li>\n<li>Parting lines<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">Look for:<\/p>\n<ul data-spread=\"false\">\n<li>Small tears<\/li>\n<li>White stress marks<\/li>\n<li>Distortion<\/li>\n<li>Surface damage<\/li>\n<li>Permanent stretching<\/li>\n<\/ul>\n<h3>Check Shape Recovery<\/h3>\n<p class=\"isSelectedEnd\">Allow the product to rest under the agreed conditions.<\/p>\n<p class=\"isSelectedEnd\">Confirm whether stretched areas return to the approved shape.<\/p>\n<h3>Compare Mold Cavities<\/h3>\n<p class=\"isSelectedEnd\">Identify samples by cavity number.<\/p>\n<p class=\"isSelectedEnd\">One cavity may release differently because of small differences in:<\/p>\n<ul data-spread=\"false\">\n<li>Surface finish<\/li>\n<li>Venting<\/li>\n<li>Geometry<\/li>\n<li>Filling<\/li>\n<li>Mold condition<\/li>\n<\/ul>\n<h3>Repeat Demolding<\/h3>\n<p class=\"isSelectedEnd\">One successful part is not enough.<\/p>\n<p class=\"isSelectedEnd\">Repeated production should confirm that the product can be removed consistently.<\/p>\n<h3>Repeat Functional Testing<\/h3>\n<p class=\"isSelectedEnd\">After demolding, confirm that the product still performs its intended function.<\/p>\n<p class=\"isSelectedEnd\">For a teether, check:<\/p>\n<ul data-spread=\"false\">\n<li>Ring shape<\/li>\n<li>Hole geometry<\/li>\n<li>Texture integrity<\/li>\n<li>Thin connections<\/li>\n<li>Overall deformation<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">The product should not pass simply because it can physically be removed from the mold.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-medium wp-image-10919\" src=\"https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-demolding-quality-inspection.jpg-300x300.jpg\" alt=\"Silicone teether demolding and quality inspection\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-demolding-quality-inspection.jpg-300x300.jpg 300w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-demolding-quality-inspection.jpg-150x150.jpg 150w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-demolding-quality-inspection.jpg-768x768.jpg 768w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-demolding-quality-inspection.jpg-12x12.jpg 12w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-demolding-quality-inspection.jpg-600x600.jpg 600w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-demolding-quality-inspection.jpg-100x100.jpg 100w, https:\/\/www.lyasilicone.com\/wp-content\/uploads\/2026\/08\/silicone-teether-demolding-quality-inspection.jpg.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Undercut_and_Demolding_DFM_Checklist\"><\/span>Undercut and Demolding DFM Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table>\n<tbody>\n<tr>\n<td>Artikel<\/td>\n<td>What Buyers Should Confirm<\/td>\n<\/tr>\n<tr>\n<td>Main release direction<\/td>\n<td>Product can leave the mold in a controlled direction<\/td>\n<\/tr>\n<tr>\n<td>Undercuts<\/td>\n<td>Depth and geometry are practical<\/td>\n<\/tr>\n<tr>\n<td>Narrow openings<\/td>\n<td>Enough surrounding material remains<\/td>\n<\/tr>\n<tr>\n<td>Thin areas<\/td>\n<td>Not overstretched during release<\/td>\n<\/tr>\n<tr>\n<td>Textures<\/td>\n<td>Roots and direction allow stable demolding<\/td>\n<\/tr>\n<tr>\n<td>Internal lips<\/td>\n<td>Mold release is considered before assembly function<\/td>\n<\/tr>\n<tr>\n<td>Material<\/td>\n<td>Flexibility and tear behavior suit the structure<\/td>\n<\/tr>\n<tr>\n<td>Hardness<\/td>\n<td>Evaluated together with geometry<\/td>\n<\/tr>\n<tr>\n<td>Mold structure<\/td>\n<td>Inserts or split construction identified early<\/td>\n<\/tr>\n<tr>\n<td>Surface finish<\/td>\n<td>Demolding does not damage cosmetic areas<\/td>\n<\/tr>\n<tr>\n<td>Mold cavities<\/td>\n<td>Each cavity releases consistently<\/td>\n<\/tr>\n<tr>\n<td>Pilot production<\/td>\n<td>Demolding remains repeatable at production volume<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_LYA_Silicone_Supports_Demolding_DFM_Review\"><\/span>How LYA Silicone Supports Demolding DFM Review<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">LYA Silicone&#8217;s current website positions the company around <a href=\"https:\/\/www.lyasilicone.com\/de\/oem-service\/\"><strong>OEM and ODM development<\/strong><\/a> for silicone baby, pet, outdoor, educational and other consumer silicone products, with project support covering drawings, mold development, sampling and mass production.<\/p>\n<p class=\"isSelectedEnd\">For products with complex undercuts or flexible structures, project review may include:<\/p>\n<ul data-spread=\"false\">\n<li>Product drawing review<\/li>\n<li>Undercut analysis<\/li>\n<li>Demolding-direction evaluation<\/li>\n<li>Wall-thickness review<\/li>\n<li>Material and hardness discussion<\/li>\n<li>Texture review<\/li>\n<li>Mold-structure planning<\/li>\n<li>Sample production<\/li>\n<li>Demolding inspection<\/li>\n<li>Shape-recovery validation<\/li>\n<li>Pilot production<\/li>\n<li>Mass-production quality control<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">The best time to solve a difficult demolding problem is before mold machining begins.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3>Can Silicone Products Have Undercuts?<\/h3>\n<p class=\"isSelectedEnd\">Yes.<\/p>\n<p class=\"isSelectedEnd\">Silicone flexibility allows many undercut structures, but depth, wall thickness, material behavior and release direction still need engineering review.<\/p>\n<h3>Does Softer Silicone Always Make Demolding Easier?<\/h3>\n<p class=\"isSelectedEnd\">No.<\/p>\n<p class=\"isSelectedEnd\">A softer product may stretch more easily, but the final result also depends on tear resistance, geometry, thickness and the undercut structure.<\/p>\n<h3>Can a Deep Undercut Tear the Product?<\/h3>\n<p class=\"isSelectedEnd\">It can increase tear risk when excessive stretching is concentrated around thin or sharp areas.<\/p>\n<h3>Do Silicone Products Always Need Draft Angles?<\/h3>\n<p class=\"isSelectedEnd\">Not every feature requires the same draft strategy.<\/p>\n<p class=\"isSelectedEnd\">The required geometry depends on feature depth, material, surface finish and mold-release method.<\/p>\n<h3>Can the Mold Be Changed After Demolding Problems Appear?<\/h3>\n<p class=\"isSelectedEnd\">Sometimes mold modification is possible, but it can add tooling cost, sample revisions and project delay.<\/p>\n<p class=\"isSelectedEnd\">Undercut and release risks are better reviewed during DFM.<\/p>\n<h3>Should Demolding Be Checked During Pilot Production?<\/h3>\n<p class=\"isSelectedEnd\">Yes.<\/p>\n<p class=\"isSelectedEnd\">Pilot production helps confirm whether the release method is repeatable across cavities, operators and a longer production run.<\/p>\n<div contenteditable=\"false\">\n<hr \/>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Design_the_Product_for_Both_Use_and_Manufacturing\"><\/span>Design the Product for Both Use and Manufacturing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">A successful silicone product must work in two different situations:<\/p>\n<ul data-spread=\"false\">\n<li>During customer use<\/li>\n<li>During manufacturing and demolding<\/li>\n<\/ul>\n<p class=\"isSelectedEnd\">An attractive undercut, texture or locking structure should not create unnecessary tearing, deformation or slow manual production.<\/p>\n<p class=\"isSelectedEnd\">Before tooling, review:<\/p>\n<ul data-spread=\"false\">\n<li>Undercuts<\/li>\n<li>Demolding direction<\/li>\n<li>Wall thickness<\/li>\n<li>Material<\/li>\n<li>Hardness<\/li>\n<li>Texture<\/li>\n<li>Mold structure<\/li>\n<li>Shape recovery<\/li>\n<li>Pilot-production behavior<\/li>\n<\/ul>\n<p>To review the mold-release risk of your custom silicone product, send <a href=\"https:\/\/www.lyasilicone.com\/de\/contact\/\"><strong>LYA-Silikon<\/strong><\/a> your drawing, product application, material requirement, target hardness, critical textures, expected quantity and product-use requirements.<\/p>","protected":false},"excerpt":{"rendered":"<p>Answer Excerpt Undercuts can be used in custom silicone products because cured silicone is flexible, but the product still needs [&hellip;]<\/p>","protected":false},"author":1,"featured_media":10917,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Silicone Undercut & Demolding Design Guide | LYA","_seopress_titles_desc":"Learn how undercuts, 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