{"id":15925,"date":"2026-03-16T16:33:15","date_gmt":"2026-03-16T08:33:15","guid":{"rendered":"https:\/\/rysilicone.com\/?p=15925"},"modified":"2026-04-07T10:53:46","modified_gmt":"2026-04-07T02:53:46","slug":"designing-undercuts-in-silicone-injection-molding","status":"publish","type":"post","link":"https:\/\/rysilicone.com\/da\/designing-undercuts-in-silicone-injection-molding\/","title":{"rendered":"Design af undersk\u00e6ringer i silikone spr\u00f8jtest\u00f8bning"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Undersk\u00e6ringer for\u00e5rsager ofte problemer i produktionslokalet. Hvis en del har en uplanlagt undersk\u00e6ring, kan den s\u00e6tte sig fast under udkastning. Fleksible materialer som f.eks. <a href=\"https:\/\/rysilicone.com\/da\/liquid-silicone-rubber\/\">LSR<\/a> eller <a href=\"https:\/\/rysilicone.com\/da\/silicone-vs-tpe\/\">TPE<\/a> str\u00e6kke, kn\u00e6kke eller efterlade overfladem\u00e6rker, hvis formdesignet ikke er justeret til materialets opf\u00f8rsel. Sm\u00e5 fejl kan opst\u00e5 i kaskader. En fastklemt del kan stoppe en maskine i minutter, nogle gange timer, hvis formen skal inspiceres eller justeres.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Erfarne teams l\u00e6rer hurtigt, at planl\u00e6gning af undersk\u00e6ringer sparer tid og omkostninger. Du forhindrer ikke kun fastsiddende dele. Du reducerer spild, minimerer v\u00e6rkt\u00f8jsslid og undg\u00e5r forl\u00e6ngede cyklustider. Selv mindre funktioner, som en klikflig eller en lille rille, kan skabe problemer, hvis de ignoreres tidligt i designfasen.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/a-team-of-engineers-standing-around-a-prototype-mold-in-a-workshop-setting.jpg\" alt=\"\" class=\"wp-image-15926\" srcset=\"https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/a-team-of-engineers-standing-around-a-prototype-mold-in-a-workshop-setting.jpg 800w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/a-team-of-engineers-standing-around-a-prototype-mold-in-a-workshop-setting-300x169.jpg 300w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/a-team-of-engineers-standing-around-a-prototype-mold-in-a-workshop-setting-768x432.jpg 768w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/a-team-of-engineers-standing-around-a-prototype-mold-in-a-workshop-setting-18x10.jpg 18w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/a-team-of-engineers-standing-around-a-prototype-mold-in-a-workshop-setting-600x338.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Evaluering af undersk\u00e6ringsn\u00f8dvendighed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Visse funktioner har n\u00e6sten altid brug for undersk\u00e6ringer:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kliklukninger p\u00e5 flip-covers eller medicinske huse<\/li>\n\n\n\n<li>Lodrette gevind, buer eller tr\u00e5dspalter<\/li>\n\n\n\n<li>Tykv\u00e6ggede kerner for at forhindre krympning og vridning<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ikke alle buler eller riller kr\u00e6ver en sidev\u00e6rts kerne eller elastisk udl\u00f8sning. Nogle gange l\u00f8ser det problemet at justere v\u00e6gkonussen eller flytte skillelinjen en smule. P\u00e5 et tyndv\u00e6gget LSR-d\u00e6ksel fjernede det behovet for to sidev\u00e6rts udl\u00f8sninger at flytte en tap med kun 1 mm og tilf\u00f8je en lille tr\u00e6kvinkel. Cyklustiden forbedredes, og skrothastigheden faldt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e5r du beslutter dig, skal du overveje formens kompleksitet, produktionsvolumen og nem vedligeholdelse. Nogle gange er det v\u00e6rd at undg\u00e5 sideeffekter at redesigne delen en smule. Besparelserne i bearbejdning og formens kompleksitet opvejer normalt det mindre designkompromis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Strategi for skillelinje<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Det <a href=\"https:\/\/rysilicone.com\/da\/what-are-parting-lines-in-silicone-products-manufacturing\/\">skillelinje<\/a> bestemmer, hvordan formen adskilles. Det p\u00e5virker udkastning af emne, overfladefinish og monteringstilpasning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f8gleregler:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Placer aldrig en linje p\u00e5 t\u00e6tningskanter eller klikfastg\u00f8relsesflader<\/li>\n\n\n\n<li>Undg\u00e5 monteringsflader, hvor to dele m\u00f8des<\/li>\n\n\n\n<li>Zigzag-linjer hj\u00e6lper med at frig\u00f8re stress under udkastning, men \u00f8ger bearbejdningstiden<\/li>\n\n\n\n<li>Selv 1-2 mm forskydninger i linen kan forhindre mindre tr\u00e6km\u00e6rker<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Eksempeltabel: Retningslinjer for skillelinjer<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Feature<\/td><td class=\"has-text-align-center\" data-align=\"center\">Linjeplacering<\/td><td class=\"has-text-align-center\" data-align=\"center\">Effekt<\/td><td class=\"has-text-align-center\" data-align=\"center\">Note<\/td><\/tr><tr><td>Klikl\u00e5s-fane<\/td><td>Side<\/td><td>Beskytter overfladefinishen<\/td><td>Dybgang &gt;2\u00b0 anbefales<\/td><\/tr><tr><td>Tykv\u00e6gget<\/td><td>Centerlinje<\/td><td>Reducerer m\u00e6rker fra vasken<\/td><td>En let kernetilspidsning kan v\u00e6re n\u00f8dvendig<\/td><\/tr><tr><td>T\u00e6tningskant<\/td><td>Undg\u00e5<\/td><td>Opretholder t\u00e6tning<\/td><td>Planl\u00e6g afsp\u00e6rringsflade<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Tidlig justering af skillelinjen kan fjerne undersk\u00e6ringskonflikter, reducere formkompleksiteten og forkorte produktionscyklusserne. P\u00e5 nylige projekter har en lille flytning af linjen gjort det muligt at h\u00e5ndtere tre undersk\u00e6ringsfunktioner uden yderligere kerner.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Diagram-of-Parting-Line-Placement-on-a-Complex-Silicone-Part.jpg\" alt=\"\" class=\"wp-image-15927\" srcset=\"https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Diagram-of-Parting-Line-Placement-on-a-Complex-Silicone-Part.jpg 800w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Diagram-of-Parting-Line-Placement-on-a-Complex-Silicone-Part-300x169.jpg 300w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Diagram-of-Parting-Line-Placement-on-a-Complex-Silicone-Part-768x432.jpg 768w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Diagram-of-Parting-Line-Placement-on-a-Complex-Silicone-Part-18x10.jpg 18w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Diagram-of-Parting-Line-Placement-on-a-Complex-Silicone-Part-600x338.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Bump-Off for elastiske funktioner<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bump-off bruger materialets elasticitet til at frig\u00f8re mindre undersk\u00e6ringer. Det fungerer bedst til tynde v\u00e6gge, fleksible faner og sm\u00e5 tryk.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Retningslinier:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stigvinkel: 30\u00b0\u201345\u00b0<\/li>\n\n\n\n<li>Undg\u00e5 ribber, skarpe hj\u00f8rner eller tykke zoner<\/li>\n\n\n\n<li>Beregn udkastningsplads for at forhindre overstr\u00e6kning<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">P\u00e5 produktionslinjen br\u00f8d en tynd, fleksibel tap gentagne gange sammen med sm\u00e5 tr\u00e6km\u00e6rker. Justering af bump-off-vinklen til 35\u00b0 l\u00f8ste problemet. Produktionen forl\u00f8b problemfrit, tusindvis af dele ad gangen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Selv sm\u00e5 justeringer \u2013 at flytte bump-off-punktet med 0,5 mm eller tilf\u00f8je 1-2\u00b0 tr\u00e6k \u2013 kan fjerne m\u00e6rker uden at skulle redesigne formen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sidevirkende kerner til stive funktioner<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sidevirkende kerner er afg\u00f8rende, n\u00e5r elementer ikke kan skubbes ud langs hovedaksen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Indvendige gevind, dybe hulrum eller stive buer<\/li>\n\n\n\n<li>Pladsen skal tillade fri bev\u00e6gelse<\/li>\n\n\n\n<li>Hold bev\u00e6gelsen lodret; vinklede glidere komplicerer formene<\/li>\n\n\n\n<li>Tr\u00e6kflader i kontakt med kerner<\/li>\n\n\n\n<li>V\u00e6lg materialer og bel\u00e6gninger med lav friktion for at sikre kernens lange levetid<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Rutinem\u00e6ssig vedligeholdelse er afg\u00f8rende. Grater eller snavs p\u00e5 en sidemonteret del kan for\u00e5rsage ridser eller deformerede dele. Ugentlig inspektion og sm\u00f8ring forhindrer slid og holder delene ensartede.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Multi-Feature-Silicone-Part-Ready-for-Assembly.jpg\" alt=\"\" class=\"wp-image-15929\" srcset=\"https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Multi-Feature-Silicone-Part-Ready-for-Assembly.jpg 800w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Multi-Feature-Silicone-Part-Ready-for-Assembly-300x169.jpg 300w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Multi-Feature-Silicone-Part-Ready-for-Assembly-768x432.jpg 768w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Multi-Feature-Silicone-Part-Ready-for-Assembly-18x10.jpg 18w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Multi-Feature-Silicone-Part-Ready-for-Assembly-600x338.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Materialevalg p\u00e5virker undersk\u00e6ringsdesign<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Materialets adf\u00e6rd dikterer, hvilke funktioner der er mulige:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LSR: elastisk, mindre undersk\u00e6ringer skubbes ofte ud uden ekstra mekanismer<\/li>\n\n\n\n<li>TPE: mindre elastisk, kan kr\u00e6ve sidev\u00e6rts virkende kerner<\/li>\n\n\n\n<li>Fyldte silikoner: \u00f8get stivhed, omhyggelig planl\u00e6gning n\u00f8dvendig<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">En tykv\u00e6gget LSR-del med flere trykknapper illustrerer dette. Materialets elasticitet gjorde det muligt at erstatte to sidefunktioner med bump-offs, hvilket forenklede formen, s\u00e6nkede omkostningerne og fremskyndede produktionen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Balancering af design, omkostninger og produktion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hvert undersk\u00e6ringspunkt \u00f8ger omkostninger, cyklustid og kompleksitet. P\u00e5 fabriksgulvet:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Medtag kun undersk\u00e6ringer, der er n\u00f8dvendige for funktionen<\/li>\n\n\n\n<li>Juster udkastvinklerne for at reducere udkastningskr\u00e6fterne<\/li>\n\n\n\n<li>Brug bump-off n\u00e5r elasticiteten er tilstr\u00e6kkelig<\/li>\n\n\n\n<li>Gennemg\u00e5 f\u00f8rst skillelinjer for at undg\u00e5 komplekse mekanismer<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Undersk\u00e5ret beslutningsmatrix<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Type<\/td><td class=\"has-text-align-center\" data-align=\"center\">Materiale<\/td><td class=\"has-text-align-center\" data-align=\"center\">Metode<\/td><td class=\"has-text-align-center\" data-align=\"center\">Risiko<\/td><\/tr><tr><td>Klikl\u00e5s-fane<\/td><td>LSR<\/td><td>Bump-off<\/td><td>Tr\u00e6km\u00e6rker hvis dybgang &lt;30\u00b0<\/td><\/tr><tr><td>Indvendig gevind<\/td><td>TPE<\/td><td>Sideaktion<\/td><td>Kerneslitage, friktionsm\u00e6rker<\/td><\/tr><tr><td>Tykv\u00e6gget hulrum<\/td><td>LSR\/TPE<\/td><td>Juster skillelinjen<\/td><td>Krympning, synkem\u00e6rker<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Casestudier viser, at kombinationen af sm\u00e5 designjusteringer, placering af bump-offs og selektive sideafbrydelser l\u00f8ser de fleste udfordringer med undersk\u00e6ring effektivt. Skrot falder, cyklusser forkortes, og formens levetid forbedres.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Silicone-Part-Inspection-Post-Ejection.jpg\" alt=\"\" class=\"wp-image-15930\" srcset=\"https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Silicone-Part-Inspection-Post-Ejection.jpg 800w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Silicone-Part-Inspection-Post-Ejection-300x169.jpg 300w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Silicone-Part-Inspection-Post-Ejection-768x432.jpg 768w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Silicone-Part-Inspection-Post-Ejection-18x10.jpg 18w, https:\/\/rysilicone.com\/wp-content\/uploads\/2026\/03\/Silicone-Part-Inspection-Post-Ejection-600x338.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Indsigt i produktionsgulvet<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hver bev\u00e6gelig del i en form tilf\u00f8jer sekunder til cyklussen. Ved at eliminere un\u00f8dvendige sideaktioner sparer du tid ved store serier.<\/li>\n\n\n\n<li>Materialets elastiske egenskaber undervurderes ofte. Sm\u00e5 justeringer af v\u00e6gkonus forhindrer rifter og m\u00e6rker p\u00e5 overfladen.<\/li>\n\n\n\n<li>DFM-gennemgange opdager problemer med undersk\u00e6ring f\u00f8r formfremstilling. Tidlig observation af udkastningsadf\u00e6rd muligg\u00f8r justeringer f\u00f8r indg\u00e5else af beslutninger.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Sm\u00e5 justeringer i udkast, delelinje eller bump-off placering har uforholdsm\u00e6ssig stor indflydelse p\u00e5 emnekvaliteten. Ingeni\u00f8rer ser ofte en emneudkastning og justerer vinklerne med 1-2\u00b0 for at optimere resultaterne. Disse sm\u00e5 \u00e6ndringer sparer timevis af fejlfinding senere.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Konklusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Undersk\u00e6ringer b\u00f8r kun forekomme, n\u00e5r funktionen kr\u00e6ver det. Omhyggeligt materialevalg, planl\u00e6gning af skillelinjer, bump-off design og sidev\u00e6rts integration sikrer produktion af h\u00f8j kvalitet og p\u00e5lidelighed. Tidligt samarbejde mellem design- og produktionsteams undg\u00e5r overraskelser, reducerer spild og forl\u00e6nger formens levetid.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Det er vigtigt at forst\u00e5, hvordan silikone opf\u00f8rer sig under tryk, hvordan forme interagerer med funktioner, og hvordan mindre justeringer p\u00e5virker produktionen. Gode designbeslutninger p\u00e5 forh\u00e5nd forhindrer uger med dyr fejlfinding. P\u00e5lidelige resultater kommer fra observation, testning og justering under reelle produktionsforhold, ikke fra vilk\u00e5rlige designregler.<\/p>","protected":false},"excerpt":{"rendered":"<p>Undercuts often cause trouble on the production floor. If a part has an unplanned undercut, it may stick during ejection. Flexible materials like LSR or TPE stretch, snap, or leave surface marks if the mold design isn\u2019t aligned with material behavior. Small mistakes can cascade. One jammed part can halt a machine for minutes, sometimes [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15928,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[794],"tags":[],"class_list":["post-15925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-silicone-technology"],"_links":{"self":[{"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/posts\/15925","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/comments?post=15925"}],"version-history":[{"count":0,"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/posts\/15925\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/media\/15928"}],"wp:attachment":[{"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/media?parent=15925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/categories?post=15925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rysilicone.com\/da\/wp-json\/wp\/v2\/tags?post=15925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}