{"id":1949,"date":"2024-10-14T23:49:50","date_gmt":"2024-10-14T15:49:50","guid":{"rendered":"https:\/\/plas.co\/?p=1949"},"modified":"2024-10-15T00:07:20","modified_gmt":"2024-10-14T16:07:20","slug":"tpe-overmolding","status":"publish","type":"post","link":"https:\/\/plas.co\/cs\/tpe-overmolding\/","title":{"rendered":"P\u0159etla\u010dov\u00e1n\u00ed TPE"},"content":{"rendered":"<p class=\"MsoNormal\"><span lang=\"EN-US\">Nyn\u00ed je \u010das za\u010d\u00edt s p\u0159etla\u010dov\u00e1n\u00edm termoplastick\u00fdch elastomer\u016f (TPE). TPE se tradi\u010dn\u011b pou\u017e\u00edvaj\u00ed jako n\u00e1hrada pry\u017ee, ale d\u00edky nov\u00fdm trend\u016fm na spot\u0159ebitelsk\u00e9m trhu se my\u0161lenka overmoldingu stala skute\u010dnost\u00ed i v obchodn\u00edm sv\u011bt\u011b. Na spot\u0159ebitelsk\u00e9m trhu roste popt\u00e1vka a trendy po lep\u0161\u00edm ergonomick\u00e9m pocitu a dotyku, uchopitelnosti, vzhledu, ochran\u011b proti n\u00e1razu, odd\u011blen\u00ed vibrac\u00ed a izolaci. Design\u00e9\u0159i spot\u0159ebitelsk\u00fdch v\u00fdrobk\u016f nastavuj\u00ed standard, kter\u00fd mus\u00ed v\u00fdrobci materi\u00e1l\u016f splnit, a p\u0159ich\u00e1zej\u00ed s \u0159e\u0161en\u00edmi, kter\u00e1 dob\u0159e vypadaj\u00ed a p\u016fsob\u00ed na dotek a dob\u0159e funguj\u00ed v n\u00e1ro\u010dn\u00fdch aplikac\u00edch pro kone\u010dn\u00e9 pou\u017eit\u00ed.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Tato sta\u0165 pojedn\u00e1v\u00e1 o technologii TPE overmolding obecn\u011b a o n\u00ed jako o skupin\u011b materi\u00e1l\u016f, kter\u00e9 lze pou\u017e\u00edt pro navrhov\u00e1n\u00ed \u0159e\u0161en\u00ed tohoto evergreenov\u00e9ho trendu. Z hlediska tuh\u00fdch substr\u00e1t\u016f jsou p\u0159\u00edkladem polypropylen (PP), polyethylen (PE), polystyren (PS), polystyren s vysokou r\u00e1zovou hmotnost\u00ed (HIPS), polyfenyloxid (PPO), glykolem modifikovan\u00fd polyethylentereftal\u00e1t (PETG), akrylonitrilbutadienstyren (ABS) a semikrystalick\u00e9 pol\u00e1rn\u00ed plasty jako polyester (PET, PBT) a polyamid (Nylon 6, Nylon 66). Nov\u00e9 technologie m\u00edch\u00e1n\u00ed a kompatibilizace materi\u00e1l\u016f umo\u017enily vyr\u00e1b\u011bt zbo\u017e\u00ed, kter\u00e9 lze na tyto r\u016fzn\u00e9 substr\u00e1ty p\u0159etavit.<\/span><\/p>\n<p><a href=\"http:\/\/plas.co\/wp-content\/uploads\/2024\/10\/overmolding.jpg\"><img decoding=\"async\" class=\"size-full wp-image-1952 aligncenter\" src=\"http:\/\/plas.co\/wp-content\/uploads\/2024\/10\/overmolding.jpg\" alt=\"overmolding\" width=\"1200\" height=\"600\" srcset=\"https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/overmolding.jpg 1200w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/overmolding-300x150.jpg 300w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/overmolding-1030x515.jpg 1030w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/overmolding-768x384.jpg 768w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/overmolding-705x353.jpg 705w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/a><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Pro TPE p\u0159etaven\u00e9 na tuh\u00fd povrch je d\u016fle\u017eit\u00e1 \u0159ada v\u011bc\u00ed. Prvn\u00ed a nejd\u016fle\u017eit\u011bj\u0161\u00ed v\u011bc\u00ed je zvolit typ TPE, kter\u00fd bude fungovat s pevn\u00fdm podkladem. D\u016fle\u017eit\u00fd je tak\u00e9 proces p\u0159etla\u010dov\u00e1n\u00ed (nap\u0159\u00edklad vkl\u00e1d\u00e1n\u00ed nebo 2K lisov\u00e1n\u00ed), typ stroje, podm\u00ednky procesu, zp\u016fsob p\u0159\u00edpravy materi\u00e1lu, konstrukce d\u00edlu a konstrukce formy. Unik\u00e1tn\u00ed materi\u00e1lov\u00e9 technologie, nov\u00e9 konstrukce d\u00edl\u016f a n\u00e1stroj\u016f a zdokonalen\u00ed technologi\u00ed overmoldingu budou udr\u017eovat mysl konstrukt\u00e9r\u016f aktivn\u00ed, aby mohli uspokojit neust\u00e1le rostouc\u00ed pot\u0159eby spot\u0159ebitel\u016f na pohodl\u00ed, dobr\u00fd vzhled a p\u0159idanou hodnotu.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Obsah<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"P\u0159epnut\u00ed tabulky obsahu\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">P\u0159ep\u00edn\u00e1n\u00ed<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/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:\/\/plas.co\/cs\/tpe-overmolding\/#TPE_Overmolding_Technology\" >Technologie p\u0159etla\u010dov\u00e1n\u00ed TPE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/plas.co\/cs\/tpe-overmolding\/#Insert_Molding-insert_overmolding\" >Vlo\u017ekov\u00e9 lisov\u00e1n\u00ed-insert overmolding<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/plas.co\/cs\/tpe-overmolding\/#TPE_Overmolding_Process\" >Proces p\u0159etla\u010dov\u00e1n\u00ed TPE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/plas.co\/cs\/tpe-overmolding\/#Overmolding_Part_Design_Considerations\" >\u00davahy o konstrukci d\u00edl\u016f s p\u0159etla\u010dov\u00e1n\u00edm<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/plas.co\/cs\/tpe-overmolding\/#How_TPE_Sticks_to_Engineering_Thermoplastic\" >Jak TPE p\u0159ilne k technick\u00e9mu termoplastu<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"TPE_Overmolding_Technology\"><\/span>Technologie p\u0159etla\u010dov\u00e1n\u00ed TPE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><a href=\"https:\/\/plas.co\/cs\/tpe-overmolding\/\">P\u0159ekr\u00fdv\u00e1n\u00ed TPE<\/a> pou\u017e\u00edv\u00e1 vst\u0159ikov\u00e1n\u00ed k nan\u00e1\u0161en\u00ed jednoho materi\u00e1lu (Over-Mold) na jin\u00fd materi\u00e1l (Substrate). P\u0159etvarovan\u00fd materi\u00e1l by m\u011bl p\u0159ilnout k podkladu tak, aby vydr\u017eel p\u0159i kone\u010dn\u00e9m pou\u017eit\u00ed a dob\u0159e fungoval. Over-molding odstra\u0148uje pot\u0159ebu lepidel a z\u00e1kladn\u00edch n\u00e1t\u011br\u016f pro p\u0159ipevn\u011bn\u00ed TPE na tvrd\u00e9 materi\u00e1ly. Technologie overmolding d\u00e1v\u00e1 konstrukt\u00e9r\u016fm v\u011bt\u0161\u00ed volnost, sni\u017euje v\u00fdrobn\u00ed n\u00e1klady a usnad\u0148uje v\u00fdrobu. V\u00edcemateri\u00e1lov\u00e9 tvarov\u00e1n\u00ed a vkl\u00e1d\u00e1n\u00ed jsou dva hlavn\u00ed zp\u016fsoby, jak prov\u00e1d\u011bt over-molding.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Vst\u0159ikov\u00e1n\u00ed s v\u00edce ne\u017e jedn\u00edm materi\u00e1lem je tak\u00e9 zn\u00e1m\u00e9 jako v\u00edcebarevn\u00e9 vst\u0159ikov\u00e1n\u00ed nebo vst\u0159ikov\u00e1n\u00ed se dv\u011bma n\u00e1st\u0159iky. Obr\u00e1zek 1 ukazuje, jak\u00e9 n\u00e1stroje se pou\u017e\u00edvaj\u00ed. Maj\u00ed dv\u011b nebo v\u00edce vst\u0159ikovac\u00edch jednotek. Vst\u0159ikovac\u00ed ramena stroje mohou b\u00fdt nastavena tak, \u017ee jsou navz\u00e1jem rovnob\u011b\u017en\u00e1 nebo k sob\u011b sv\u00edraj\u00ed prav\u00fd \u00fahel. Ve form\u011b jsou dv\u011b sady otvor\u016f. Jedna sada formuje z\u00e1kladn\u00ed materi\u00e1l a druh\u00e1 sada formuje kryc\u00ed materi\u00e1l.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Proces lisov\u00e1n\u00ed dv\u011bma v\u00fdst\u0159ely prob\u00edh\u00e1 ve dvou kroc\u00edch. Prvn\u00ed krok spo\u010d\u00edv\u00e1 v tom, \u017ee prvn\u00ed hlave\u0148 vypln\u00ed sadu otvor\u016f substr\u00e1tu. Jakmile je substr\u00e1t vychladl\u00fd, forma se otev\u0159e a strana, kterou lze pohybovat, se oto\u010d\u00ed o 180\u00b0, ani\u017e by substr\u00e1t vyjel z formy. Pot\u00e9 se forma uzav\u0159e a do druh\u00e9ho v\u00e1lce se vst\u0159\u00edkne p\u0159etvo\u0159en\u00fd materi\u00e1l. Druh\u00e1 polovina formy se vypln\u00ed na stran\u011b, kter\u00e1 z\u016fst\u00e1v\u00e1 v klidu. Pokud je t\u0159eba materi\u00e1l pro nadlisov\u00e1n\u00ed tvarovat na obou stran\u00e1ch d\u00edlu, m\u016f\u017ee se forma m\u00edsto ot\u00e1\u010den\u00ed pohybovat mezi dv\u011bma sadami otvor\u016f.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Rota\u010dn\u00ed deskov\u00e9 stroje vs. rota\u010dn\u00ed lisy: Rota\u010dn\u00ed deska na druh\u00e9 \u010d\u00e1sti lisu je n\u011bkdy zabudov\u00e1na do stroje, aby se mohla ot\u00e1\u010det. Pokud se rota\u010dn\u00ed deska pou\u017e\u00edv\u00e1 \u010dty\u0159ikr\u00e1t samostatn\u011b, obvykle se pou\u017e\u00edvaj\u00ed poloviny forem, kter\u00e9 jsou na n\u00ed namontov\u00e1ny. Jsou p\u0159\u00edpady, kdy je ot\u00e1\u010den\u00ed zabudov\u00e1no do samotn\u00e9ho n\u00e1stroje a jsou pou\u017eity pouze dv\u011b poloviny formy, ale \u010dty\u0159i sady otvor\u016f formy.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">St\u011bhov\u00e1n\u00ed: N\u00e1stroj v procesu Core m\u00e1 pohyblivou \u010d\u00e1st, kter\u00e1 je poh\u00e1n\u011bna hydraulikou nebo vzduchem. Jakmile je prvn\u00ed substr\u00e1t vst\u0159\u00edknut a m\u00e1 \u010das vychladnout, \u010d\u00e1st formy se st\u00e1hne a vytvo\u0159\u00ed prostor pro materi\u00e1l TPE over-mold. Pot\u00e9 je TPE vlo\u017een, v\u011bt\u0161inou ze strany otvoru, kter\u00e1 je viditeln\u00e1 po sta\u017een\u00ed vlo\u017eky zp\u011bt. Tato metoda m\u00e1 rychlej\u0161\u00ed dobu cyklu, v\u011bt\u0161\u00ed kavitaci a lep\u0161\u00ed v\u00fdkon stroje. Jedin\u00fdm probl\u00e9mem je, \u017ee lze pou\u017e\u00edt pouze konstantn\u00ed tlou\u0161\u0165ku TPE.<\/span><\/p>\n<p><a href=\"http:\/\/plas.co\/wp-content\/uploads\/2024\/10\/insert-overmolding.jpg\"><img decoding=\"async\" class=\"size-full wp-image-1953 aligncenter\" src=\"http:\/\/plas.co\/wp-content\/uploads\/2024\/10\/insert-overmolding.jpg\" alt=\"vlo\u017eka overmolding\" width=\"1200\" height=\"600\" srcset=\"https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/insert-overmolding.jpg 1200w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/insert-overmolding-300x150.jpg 300w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/insert-overmolding-1030x515.jpg 1030w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/insert-overmolding-768x384.jpg 768w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/insert-overmolding-705x353.jpg 705w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/a><\/p>\n<h2 class=\"MsoNormal\"><span class=\"ez-toc-section\" id=\"Insert_Molding-insert_overmolding\"><\/span><span lang=\"EN-US\" style=\"font-size: 16.0pt;\">Vlo\u017ekov\u00e9 lisov\u00e1n\u00ed-insert overmolding<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Vlo\u017ekov\u00e9 lisov\u00e1n\u00ed je jedn\u00edm z typ\u016f p\u0159etla\u010dov\u00e1n\u00ed, p\u0159i kter\u00e9m je tvrd\u00fd plastov\u00fd substr\u00e1t nebo kovov\u00fd d\u00edl, kter\u00fd ji\u017e byl vytvarov\u00e1n, vlo\u017een robotem nebo osobou do otvoru (obr\u00e1zek 2). Druh\u00fd materi\u00e1l, naz\u00fdvan\u00fd \"over-mold\", se vkl\u00e1d\u00e1 na jednu stranu vlo\u017eky nebo jindy kolem cel\u00e9 v\u011bci. Pro vst\u0159ikov\u00e1n\u00ed vlo\u017eek se pou\u017e\u00edvaj\u00ed standardn\u00ed vst\u0159ikovac\u00ed n\u00e1stroje.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Ot\u00e1\u010det nebo se pohybovat? Tvarov\u00e1n\u00ed stolu: K tvarov\u00e1n\u00ed substr\u00e1tu nebo vkl\u00e1d\u00e1n\u00ed vlo\u017eky do druh\u00e9 dutiny v prvn\u00ed poloze se pou\u017e\u00edv\u00e1 horizont\u00e1ln\u00ed vst\u0159ikovac\u00ed jednotka nebo robot. St\u016fl se pohybuje nebo ot\u00e1\u010d\u00ed k dal\u0161\u00edmu stanovi\u0161ti, kde se k vlo\u017een\u00ed TPE pou\u017eije dal\u0161\u00ed horizont\u00e1ln\u00ed nebo vertik\u00e1ln\u00ed vst\u0159ikovac\u00ed jednotka. Lze pou\u017e\u00edt hork\u00fd vtok nebo um\u00edstit b\u011bhoun na d\u011bl\u00edc\u00ed linku. T\u0159et\u00ed oto\u010den\u00ed stolu rota\u010dn\u00ed jednotky ji po\u0161le do stanice \"off-load\", kde se hotov\u00fd dvoud\u00edln\u00fd d\u00edl vysune.<\/span><\/p>\n<h2 class=\"MsoNormal\"><span class=\"ez-toc-section\" id=\"TPE_Overmolding_Process\"><\/span><span lang=\"EN-US\" style=\"font-size: 16.0pt;\">Proces p\u0159etla\u010dov\u00e1n\u00ed TPE<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Kter\u00fd z mo\u017en\u00fdch postup\u016f a konstrukc\u00ed forem pou\u017e\u00edt, z\u00e1vis\u00ed na zvolen\u00e9m materi\u00e1lu, n\u00e1kladech na pracovn\u00ed s\u00edlu, dostupn\u00fdch n\u00e1stroj\u00edch a stroj\u00edch a ekonomice v\u00fdroby velk\u00e9ho mno\u017estv\u00ed forem. Pokud vlo\u017eka nen\u00ed termoplast, mus\u00ed se pou\u017e\u00edt vst\u0159ikov\u00e1n\u00ed. Pokud pot\u0159ebujete pouze mal\u00e9 mno\u017estv\u00ed plastov\u00e9ho nebo kovov\u00e9ho substr\u00e1tu, n\u00e1klady na m\u00edstn\u00ed pracovn\u00ed s\u00edlu jsou n\u00edzk\u00e9 a pot\u0159ebujete udr\u017eet n\u00edzk\u00e9 n\u00e1klady na n\u00e1stroje, m\u011bli byste je um\u00edstit ru\u010dn\u011b. Pro v\u011bt\u0161\u00ed mno\u017estv\u00ed pr\u00e1ce lze pou\u017e\u00edt \u010dlunkov\u00e9 n\u00e1stroje. Roboticky um\u00edst\u011bn\u00e9 desti\u010dky a n\u00e1stroje s oto\u010dn\u00fdm stolem lze pou\u017e\u00edt, pokud mno\u017estv\u00ed pr\u00e1ce, kterou je t\u0159eba prov\u00e9st, ospravedl\u0148uje n\u00e1klady. Pokud pot\u0159ebujete vyrobit velk\u00e9 mno\u017estv\u00ed d\u00edl\u016f nebo jsou v m\u00edst\u011b va\u0161eho bydli\u0161t\u011b vysok\u00e9 n\u00e1klady na pracovn\u00ed s\u00edlu, jsou pro plastov\u00e9 podklady nejvhodn\u011bj\u0161\u00ed dvoumateri\u00e1lov\u00e9 tv\u00e1\u0159ec\u00ed stroje. Pro nejvy\u0161\u0161\u00ed po\u010dty vyroben\u00fdch d\u00edl\u016f a nejhez\u010d\u00ed vzhled jsou nejlep\u0161\u00ed syst\u00e9my s hork\u00fdmi vtoky a ventilov\u00fdmi \u0161oup\u00e1tky.<\/span><\/p>\n<h2 class=\"MsoNormal\"><span class=\"ez-toc-section\" id=\"Overmolding_Part_Design_Considerations\"><\/span><span lang=\"EN-US\" style=\"font-size: 18.0pt;\">\u00davahy o konstrukci d\u00edl\u016f s p\u0159etla\u010dov\u00e1n\u00edm<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">P\u0159i navrhov\u00e1n\u00ed p\u0159etlak\u016f existuje mnoho r\u016fzn\u00fdch \u010d\u00e1st\u00ed a tento \u010dl\u00e1nek pojedn\u00e1v\u00e1 o n\u011bkter\u00fdch obecn\u00fdch v\u011bcech, kter\u00e9 je t\u0159eba m\u00edt na pam\u011bti. <\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Co se t\u00fd\u010de materi\u00e1l\u016f, plat\u00ed pro lepiteln\u00e9 TPE p\u0159\u00edsn\u011bj\u0161\u00ed pravidla ne\u017e pro b\u011b\u017en\u00e9 TPE. Tot\u00e9\u017e plat\u00ed pro v\u00fdrobu d\u00edl\u016f. P\u0159i navrhov\u00e1n\u00ed dvoud\u00edln\u00fdch d\u00edl\u016f je t\u0159eba myslet na to, jak se budou dva r\u016fzn\u00e9 pru\u017en\u00e9 materi\u00e1ly smr\u0161\u0165ovat, co\u017e je rozd\u00edl oproti navrhov\u00e1n\u00ed jednod\u00edln\u00fdch d\u00edl\u016f. Oba maj\u00ed sv\u00e9 vlastn\u00ed syst\u00e9my vrat a b\u011bhoun\u016f, kter\u00e9 je t\u0159eba p\u0159izp\u016fsobit na z\u00e1klad\u011b vlastnost\u00ed pou\u017eit\u00e9ho materi\u00e1lu.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Abyste dos\u00e1hli co nejlep\u0161\u00edho \u010dasu cyklu, m\u011bly by b\u00fdt tenk\u00e9 st\u011bny z\u00e1kladny a nadlisku co nejrovnom\u011brn\u011bj\u0161\u00ed. Ve v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f se p\u0159i p\u0159etla\u010dov\u00e1n\u00ed dob\u0159e spoj\u00ed st\u011bny o tlou\u0161\u0165ce 1 a\u017e 3 mm. Pokud d\u00edl pot\u0159ebuje tlust\u00e9 plochy, m\u011bly by b\u00fdt vyvrt\u00e1ny, aby se d\u00edl p\u0159\u00edli\u0161 nezmen\u0161il a sn\u00ed\u017eila se doba cyklu a hmotnost. Aby se p\u0159ede\u0161lo probl\u00e9m\u016fm s proud\u011bn\u00edm, jako jsou zp\u011btn\u00e9 n\u00e1pln\u011b a lapa\u010de plyn\u016f, m\u011bly by se zm\u011bny tlou\u0161\u0165ky st\u011bn prov\u00e1d\u011bt pomalu. P\u0159id\u00e1n\u00ed kruh\u016f (alespo\u0148 0,5 mm) do ostr\u00fdch roh\u016f m\u016f\u017ee pomoci sn\u00ed\u017eit nap\u011bt\u00ed v t\u00e9to oblasti. Je t\u0159eba se vyhnout hlubok\u00fdm tmav\u00fdm kaps\u00e1m nebo \u017eebr\u016fm, kter\u00e1 nelze otev\u0159\u00edt. Dlouh\u00e9 tahy by m\u011bly m\u00edt tah 3 a\u017e 5 stup\u0148\u016f, aby se kuli\u010dka l\u00e9pe dostala ven. Hlubok\u00e9 z\u00e1\u0159ezy lze prov\u00e1d\u011bt pomoc\u00ed p\u0159etla\u010dovac\u00edch sm\u011bs\u00ed, ale pouze v p\u0159\u00edpad\u011b, \u017ee se p\u0159i otev\u00edr\u00e1n\u00ed formy pou\u017eije p\u0159edsunut\u00e9 j\u00e1dro, d\u00edl nem\u00e1 \u017e\u00e1dn\u00e9 ostr\u00e9 hrany a elastomer se p\u0159i vyj\u00ed\u017ed\u011bn\u00ed z formy m\u016f\u017ee oh\u00fdbat.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">V\u011bt\u0161ina sm\u011bs\u00ed TPE se p\u0159i vst\u0159ikov\u00e1n\u00ed smr\u0161\u0165uje ve sm\u011bru toku, ale p\u0159i vst\u0159ikov\u00e1n\u00ed v p\u0159\u00ed\u010dn\u00e9m sm\u011bru toku se smr\u0161\u0165uje m\u00e1lo. To m\u016f\u017ee zp\u016fsobit, \u017ee se po vyjmut\u00ed d\u00edlu z n\u00e1stroje smr\u0161t\u00ed materi\u00e1l pro p\u0159etaven\u00ed v\u00edce ne\u017e substr\u00e1t. To pak m\u016f\u017ee zp\u016fsobit deformaci nebo vyklenut\u00ed d\u00edlu ze substr\u00e1tu, zpravidla ve sm\u011bru toku p\u0159etv\u00e1\u0159ec\u00edho materi\u00e1lu. To plat\u00ed zejm\u00e9na u d\u00edl\u016f, kde je substr\u00e1t ten\u010d\u00ed ne\u017e p\u0159etv\u00e1\u0159en\u00fd materi\u00e1l nebo kde je pou\u017eit materi\u00e1l substr\u00e1tu s n\u00edzkou tuhost\u00ed. d\u00edly by m\u011bly b\u00fdt dlouh\u00e9 a tenk\u00e9. To lze \u010d\u00e1ste\u010dn\u011b napravit pou\u017eit\u00edm z\u00e1kladn\u00edch materi\u00e1l\u016f s vy\u0161\u0161\u00edm modulem pru\u017enosti a p\u0159id\u00e1n\u00edm ztu\u017euj\u00edc\u00edch \u017eeber do substr\u00e1tu. Pom\u016f\u017ee tak\u00e9 pou\u017eit\u00ed ten\u010d\u00edch vrstev a t\u0159\u00eddy over-mold s men\u0161\u00ed tvrdost\u00ed. Pomoci by mohlo tak\u00e9 posunut\u00ed hradla, aby se zm\u011bnil vzor toku TPE.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Pro m\u011b\u0159en\u00ed tvrdosti materi\u00e1l\u016f TPE se pou\u017e\u00edv\u00e1 tvrdost podle Shorea, co\u017e je odolnost materi\u00e1lu proti prom\u00e1\u010dknut\u00ed na lisovan\u00e9 desce o minim\u00e1ln\u00ed tlou\u0161\u0165ce 6,3 mm (ASTM D2240). P\u0159edm\u011bt s ni\u017e\u0161\u00ed tvrdost\u00ed p\u016fsob\u00ed navenek m\u011bk\u010deji, i kdy\u017e m\u00e1 stejnou tlou\u0161\u0165ku. Proto\u017ee se v\u0161ak p\u0159elisov\u00e1n\u00ed obvykle prov\u00e1d\u00ed pouze na tenk\u00e9m pl\u00e1\u0161ti TPE, ovliv\u0148uje tvrd\u00fd podklad pod n\u00edm to, jak m\u011bkk\u00fd je na omak. Pokud se to podrob\u00ed zkou\u0161ce tvrdosti, men\u0161\u00ed indentace uk\u00e1\u017ee, \u017ee k\u00e1men je tvrd\u0161\u00ed, i kdy\u017e je slupka m\u011bkk\u00e1. Pokud m\u00e1 b\u00fdt pry\u017eov\u00fd p\u0159eliv na obou stran\u00e1ch d\u00edl\u016f (A a B), je t\u0159eba pou\u017e\u00edt dv\u011b materi\u00e1lov\u00e9 formy, kter\u00e9 se mohou pohybovat mezi \u010d\u00e1stmi formy. chcete-li vytvo\u0159it hladkou vrstvu na d\u00edlu nebo na cel\u00e9 stran\u011b jednoduch\u00e9ho d\u00edlu, m\u011bli byste pou\u017e\u00edt dv\u011b materi\u00e1lov\u00e9 formy s pohybliv\u00fdmi j\u00e1dry. V\u00fdstupn\u00ed rychlost m\u016f\u017ee b\u00fdt velmi vysok\u00e1 v z\u00e1vislosti na tom, jak siln\u00e9 jsou st\u011bny elastomeru a podkladu.<\/span><\/p>\n<h2 class=\"MsoNormal\"><span class=\"ez-toc-section\" id=\"How_TPE_Sticks_to_Engineering_Thermoplastic\"><\/span><span lang=\"EN-US\">Jak TPE p\u0159ilne k technick\u00e9mu termoplastu<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Existuje mnoho faktor\u016f, kter\u00e9 mohou zm\u011bnit to, jak dob\u0159e se tvrd\u00fd technick\u00fd plast a m\u011bkk\u00e1 pry\u017e spoj\u00ed. Pro vytvo\u0159en\u00ed specifick\u00fdch vztah\u016f mezi materi\u00e1ly je d\u016fle\u017eit\u00e9, aby povrchov\u00e9 energie obou materi\u00e1l\u016f byly stejn\u00e9. Dal\u0161\u00edm d\u016fle\u017eit\u00fdm faktorem je schopnost TPE p\u0159ilnout k povrchu. Aby mezi TPE a podkladem prob\u00edhaly ur\u010dit\u00e9 reakce, mus\u00ed b\u00fdt velmi bl\u00edzko sebe a povrch mus\u00ed b\u00fdt vlhk\u00fd. Zp\u016fsob, jak\u00fdm se TPE teologizuj\u00ed, jak je zn\u00e1zorn\u011bno na obr\u00e1zku 3, ur\u010duje jejich sm\u00e1\u010den\u00ed. Materi\u00e1ly pro p\u0159etla\u010dov\u00e1n\u00ed nemaj\u00ed p\u0159\u00edli\u0161 vysokou viskozitu. Jsou tak\u00e9 citliv\u00e9 na smyk a vykazuj\u00ed smykov\u00e9 zten\u010dovac\u00ed chov\u00e1n\u00ed.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Obr\u00e1zek n\u00ed\u017ee ukazuje, \u017ee viskozita se p\u0159i vysok\u00e9m pr\u016ftoku bl\u00ed\u017e\u00ed doln\u00ed hranici rozsahu. To pom\u00e1h\u00e1 TPE vt\u00e9kat do tenkost\u011bnn\u00fdch oblast\u00ed, kter\u00e9 jsou b\u011b\u017en\u00e9 p\u0159i p\u0159etla\u010dov\u00e1n\u00ed, a vypl\u0148ovat je.<\/span><\/p>\n<p><a href=\"http:\/\/plas.co\/wp-content\/uploads\/2024\/10\/TPE-over-molding.jpg\"><img decoding=\"async\" class=\"size-full wp-image-1956 aligncenter\" src=\"http:\/\/plas.co\/wp-content\/uploads\/2024\/10\/TPE-over-molding.jpg\" alt=\"TPE over-molding\" width=\"958\" height=\"527\" srcset=\"https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/TPE-over-molding.jpg 958w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/TPE-over-molding-300x165.jpg 300w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/TPE-over-molding-768x422.jpg 768w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/TPE-over-molding-705x388.jpg 705w\" sizes=\"(max-width: 958px) 100vw, 958px\" \/><\/a><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Chemick\u00e9 slo\u017een\u00ed TPE a typ pr\u016fmyslov\u00e9ho plastu maj\u00ed velk\u00fd vliv na to, jak dob\u0159e se sm\u00e1\u010d\u00ed. Krom\u011b adhezn\u00edch vlastnost\u00ed hraj\u00ed roli tak\u00e9 difuzn\u00ed a viskoelastick\u00e9 vlastnosti elastomeru. Bod, kde se TPE a tuh\u00fd podklad setk\u00e1vaj\u00ed, je velmi d\u016fle\u017eit\u00fd jak pro pevnost spoje, tak pro typ poru\u0161en\u00ed, kter\u00e9 m\u016f\u017ee b\u00fdt bu\u010f kohezn\u00ed (C), nebo adhezn\u00ed (A). P\u0159i hled\u00e1n\u00ed zn\u00e1mek pevn\u00e9ho spoje se obvykle m\u00e1 za to, \u017ee nejl\u00e9pe se pozn\u00e1 kohezn\u00ed syst\u00e9m. Ale slab\u00fd TPE s pouze m\u00edrnou pevnost\u00ed vazby m\u016f\u017ee p\u016fsobit dojmem, \u017ee spojen\u00ed je siln\u00e9. Existuj\u00ed p\u0159\u00edpady, kdy dobr\u00e9 spojen\u00ed existuje i v p\u0159\u00edpad\u011b, \u017ee lepidlo selh\u00e1v\u00e1. Existuj\u00ed t\u0159i typy proces\u016f na styku, kter\u00e9 mohou pomoci tuh\u00e9mu podkladu a m\u011bkk\u00e9mu termoplastick\u00e9mu elastomeru dr\u017eet pohromad\u011b. Ty jsou vid\u011bt na n\u00e1sleduj\u00edc\u00edm obr\u00e1zku.<\/span><\/p>\n<p><a href=\"http:\/\/plas.co\/wp-content\/uploads\/2024\/10\/Overmolding-part-design-guideline.jpg\"><img decoding=\"async\" class=\"size-full wp-image-1950 aligncenter\" src=\"http:\/\/plas.co\/wp-content\/uploads\/2024\/10\/Overmolding-part-design-guideline.jpg\" alt=\"Pokyny pro navrhov\u00e1n\u00ed d\u00edl\u016f s p\u0159etla\u010dov\u00e1n\u00edm\" width=\"1200\" height=\"600\" srcset=\"https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/Overmolding-part-design-guideline.jpg 1200w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/Overmolding-part-design-guideline-300x150.jpg 300w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/Overmolding-part-design-guideline-1030x515.jpg 1030w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/Overmolding-part-design-guideline-768x384.jpg 768w, https:\/\/plas.co\/wp-content\/uploads\/2024\/10\/Overmolding-part-design-guideline-705x353.jpg 705w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/a><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Mechanick\u00e9 spojen\u00ed je mo\u017en\u00e9 d\u00edky designu. Mezi ob\u011bma povrchy nen\u00ed vytvo\u0159eno skute\u010dn\u00e9 spojen\u00ed, ale v tomto p\u0159\u00edpad\u011b bude fungovat jak\u00fdkoli TPE. Druh\u00fd zp\u016fsob funguje, proto\u017ee podklad a p\u0159etv\u00e1\u0159ec\u00ed materi\u00e1l TPE jsou chemicky kompatibiln\u00ed. Chemick\u00e1 kompatibilita je zalo\u017eena na povrchov\u00fdch energi\u00edch, kter\u00e9 souvisej\u00ed s t\u00edm, jak dob\u0159e spolu substr\u00e1t a TPE dr\u017e\u00ed. P\u0159i spr\u00e1vn\u00e9m zp\u016fsobu formov\u00e1n\u00ed a teplot\u011b m\u016f\u017ee vzniknout rozhran\u00ed, na kter\u00e9m se molekuly podkladu a overmold materi\u00e1lu sm\u00edchaj\u00ed. Rozhran\u00ed m\u016f\u017eete vytvo\u0159it pomoc\u00ed styrenov\u00e9ho TPE nebo olefinov\u00e9ho TPE, kter\u00fd byl nalisov\u00e1n na polyethylen jako z\u00e1klad. T\u0159et\u00ed zp\u016fsob m\u016f\u017ee b\u00fdt zabudov\u00e1n do TPE. Proces spojov\u00e1n\u00ed je tvo\u0159en specifick\u00fdmi pol\u00e1rn\u00edmi interakcemi nebo chemick\u00fdmi reakcemi mezi skupinami TPE a pevn\u00fdm podkladem.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Ke zji\u0161t\u011bn\u00ed pevnosti vazby mezi TPE a pr\u016fmyslov\u00fdm plastem lze pou\u017e\u00edt \"90stup\u0148ovou zkou\u0161ku odlupov\u00e1n\u00ed\". Zm\u011bnili jsme metodu ASTM D903 pro plasty, abychom otestovali, jak dob\u0159e p\u0159ilne m\u011bkk\u00fd TPE k tvrd\u00e9mu termoplastu. K test\u016fm se pou\u017e\u00edv\u00e1 tvarovan\u00e1 z\u00e1kladna, na n\u00ed\u017e je vylisov\u00e1na vlo\u017eka z k\u016f\u017ee TPE. Pomoc\u00ed tahov\u00e9ho testeru Instron se vy\u0159\u00edzne a nat\u00e1hne centimetr \u0161irok\u00fd prou\u017eek TPE v prav\u00e9m \u00fahlu k z\u00e1kladn\u011b. Ten je na kole\u010dku zaji\u0161t\u011bn tak, aby \u00fahel 90 stup\u0148\u016f z\u016fstal p\u0159i tahu pry\u017ee stejn\u00fd. Pevnost p\u0159ilnavosti se zji\u0161\u0165uje podle toho, jak t\u011b\u017ek\u00e9 je odtrhnout elastomer od z\u00e1kladny. Tato s\u00edla je obvykle v\u011bt\u0161\u00ed ne\u017e 2 palce. Rozd\u011bluje se do dvou skupin podle toho, zda sel\u017ee v d\u016fsledku adhezn\u00edho selh\u00e1n\u00ed (A), nebo kohezn\u00edho selh\u00e1n\u00ed (C). Adhezn\u00ed selh\u00e1n\u00ed znamen\u00e1, \u017ee na materi\u00e1lu nez\u016fstaly \u017e\u00e1dn\u00e9 zbytky TPE. Uveden\u00e1 \u010d\u00edsla jsou pr\u016fm\u011brem t\u0159\u00ed r\u016fzn\u00fdch studi\u00ed adheze. Proto\u017ee z\u00e1kazn\u00edk po\u017eaduje ur\u010ditou \u00farove\u0148 adheze, rozhodli jsme se, \u017ee \u010d\u00edslo adheze vy\u0161\u0161\u00ed ne\u017e 12 pli je dostate\u010dn\u011b dobr\u00e9.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">V sou\u010dasn\u00e9 dob\u011b je obrovsk\u00fd z\u00e1jem o p\u0159etla\u010dov\u00e1n\u00ed TPE na tuh\u00e9 substr\u00e1ty, zejm\u00e9na pro zbo\u017e\u00ed na trhu, kter\u00e9 mus\u00ed b\u00fdt m\u011bkk\u00e9 na dotek. Nov\u00e9 TPE se p\u0159etla\u010duj\u00ed na st\u00e1le v\u011bt\u0161\u00ed po\u010det substr\u00e1t\u016f. To d\u00e1v\u00e1 design\u00e9r\u016fm v\u011bt\u0161\u00ed volnost p\u0159i navrhov\u00e1n\u00ed a mo\u017enost, aby jejich zbo\u017e\u00ed vyniklo na trhu pln\u00e9m \"me-too\" kopi\u00ed.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">TPE jsou velmi zn\u00e1m\u00e9, proto\u017ee pom\u00e1haj\u00ed s prodejem v m\u00edst\u011b prodeje. Lid\u00e9 dnes maj\u00ed v obchodech na v\u00fdb\u011br z obrovsk\u00e9ho mno\u017estv\u00ed zbo\u017e\u00ed a spole\u010dnosti, kter\u00e9 zbo\u017e\u00ed vyr\u00e1b\u011bj\u00ed, cht\u011bj\u00ed, aby to jejich vyniklo. Existuje mnoho dobr\u00fdch d\u016fvod\u016f, pro\u010d si vybrat v\u00fdrobek s TPE <a href=\"https:\/\/www.plasticmold.net\/what-is-overmolding-and-2k-injection-molding\/\" target=\"_blank\" rel=\"noopener\">overmolding<\/a> povrchu, jako jsou nov\u00e9 barvy, textury, vzory a pohodl\u00ed. Pro mnoho lid\u00ed je \"tepl\u00fd\" m\u011bkk\u00fd dotek p\u0159\u00edjemn\u011bj\u0161\u00ed ne\u017e tvrd\u00fd plast. A v\u011bci, kter\u00e9 vypadaj\u00ed a p\u016fsob\u00ed na dotek jako gumov\u00e9, jsou \u010dasto pova\u017eov\u00e1ny za hodnotn\u011bj\u0161\u00ed. Lid\u00e9 jsou nyn\u00ed chyt\u0159ej\u0161\u00ed p\u0159i hled\u00e1n\u00ed zbo\u017e\u00ed, kter\u00e9 se l\u00e9pe p\u0159izp\u016fsob\u00ed jejich t\u011blu a sni\u017euje vibrace, proto\u017ee v\u011bd\u00ed v\u00edce o ergonomii a n\u00e1r\u016fstu p\u0159et\u011b\u017eov\u00e1n\u00ed kloub\u016f. P\u0159etla\u010den\u00e9 TPE mohou b\u00fdt u\u017eite\u010dn\u00e9 i pro jin\u00e9 v\u011bci, ne\u017e je pocit a pou\u017eitelnost. Mezi p\u0159\u00edklady pat\u0159\u00ed zaji\u0161t\u011bn\u00ed bezpe\u010dn\u00e9ho a pevn\u00e9ho \u00fachopu v mokr\u00fdch oblastech, vodot\u011bsn\u00e1 t\u011bsn\u011bn\u00ed a ucp\u00e1vky, tvarovan\u00e9 \"n\u00e1razn\u00edky\" chr\u00e1n\u00edc\u00ed p\u0159ed n\u00e1razy a zabra\u0148uj\u00edc\u00ed p\u0159ed\u010dasn\u00e9mu zlomen\u00ed a sni\u017euj\u00edc\u00ed vibrace.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Now is the time to start overmolding thermoplastic elastomers (TPEs). TPEs have traditionally been used to replace rubber, but new consumer market trends have made the overmolding idea a fact in the business world. Demand and trends in the consumer market are growing for better ergonomic feel and touch, grippability, looks, impact protection, vibration separation, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1953,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[13,174],"class_list":["post-1949","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-plastic-mold","tag-overmolding","tag-tpe-overmolding"],"_links":{"self":[{"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/posts\/1949","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/comments?post=1949"}],"version-history":[{"count":0,"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/posts\/1949\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/media\/1953"}],"wp:attachment":[{"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/media?parent=1949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/categories?post=1949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/plas.co\/cs\/wp-json\/wp\/v2\/tags?post=1949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}