{"id":14402,"date":"2024-02-22T10:07:51","date_gmt":"2024-02-22T02:07:51","guid":{"rendered":"https:\/\/firstmold.com\/?post_type=case-study&#038;p=14402"},"modified":"2026-02-12T13:37:54","modified_gmt":"2026-02-12T05:37:54","slug":"two-shot-injection-molding-for-precision-hair-trimmer-manufacturing","status":"publish","type":"case-study","link":"https:\/\/firstmold.com\/fr\/case-study\/two-shot-injection-molding-for-precision-hair-trimmer-manufacturing\/","title":{"rendered":"Moulage par injection en deux temps pour la fabrication de tondeuses \u00e0 cheveux de pr\u00e9cision"},"content":{"rendered":"<p id=\"h-\">Les tondeuses sont des outils importants pour le toilettage des cheveux. Il est int\u00e9ressant de noter que la plupart des fabricants ne savent pas s'ils doivent produire une tondeuse ou une tondeuse. Bien que les deux se ressemblent, la tondeuse poss\u00e8de des lames plus grandes et est id\u00e9ale pour couper une grande quantit\u00e9 de cheveux.<\/p>\n\n\n\n<p>La tondeuse \u00e0 cheveux, quant \u00e0 elle, est sp\u00e9cialis\u00e9e dans la coupe des cheveux tr\u00e8s pr\u00e8s de la peau. Elles ont des lames plus fines et sont l\u00e9g\u00e8res, ce qui les rend id\u00e9ales pour dessiner les contours, les d\u00e9tails, les bordures et le coiffage des cheveux. Les fabricants de tondeuses \u00e0 cheveux fabriquent principalement ces produits pour nettoyer les d\u00e9collet\u00e9s, les pattes ou les poils du visage. Les principales caract\u00e9ristiques des tondeuses \u00e0 cheveux sont les suivantes :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>Plus de pr\u00e9cision et de d\u00e9tails :<\/em><\/strong> Les lames plus fines permettent d'obtenir des lignes nettes et pr\u00e9cises.<\/li>\n\n\n\n<li><strong><em>Couper plus profond\u00e9ment :<\/em><\/strong> Ils coupent plus court que les tondeuses, ce qui en fait le choix id\u00e9al pour les barbes, les d\u00e9tails et les d\u00e9colorations nettes.<\/li>\n\n\n\n<li><strong><em>Plus l\u00e9ger qu'une tondeuse :<\/em><\/strong> Ils sont con\u00e7us pour \u00eatre plus compacts et plus l\u00e9gers, ce qui les rend plus faciles \u00e0 manipuler et \u00e0 utiliser pour les d\u00e9tails complexes.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-crucial-parts-of-a-hair-trimmer\">Les \u00e9l\u00e9ments essentiels d'une tondeuse \u00e0 cheveux<\/h2>\n\n\n\n<p>Pour les start-ups qui souhaitent se lancer dans la fabrication de tondeuses \u00e0 cheveux, il est important de conna\u00eetre les diff\u00e9rentes parties d'une tondeuse \u00e0 cheveux. Les tondeuses \u00e0 cheveux sont constitu\u00e9es d'un ensemble de lames amovibles entra\u00een\u00e9es par un moteur. Les composants \u00e9lectroniques sont log\u00e9s dans un bo\u00eetier en plastique dot\u00e9 d'un interrupteur. Voici les principaux composants d'une tondeuse \u00e0 cheveux.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>Lames :<\/em><\/strong> C'est la partie qui effectue la coupe proprement dite. Elle se compose d'une lame fixe qui agit comme un peigne et d'une lame mobile qui agit comme un coupeur. Les lames mobiles vibrent l'une contre l'autre pour couper les cheveux.<\/li>\n\n\n\n<li><strong><em>Moteur :<\/em><\/strong> Il fournit l'\u00e9nergie qui entra\u00eene le mouvement des lames.<\/li>\n\n\n\n<li><strong><em>Le logement :<\/em><\/strong> Le corps est l'enveloppe ext\u00e9rieure qui prot\u00e8ge les composants internes des dommages caus\u00e9s par les chocs et les \u00e9l\u00e9ments environnementaux.<\/li>\n\n\n\n<li><strong><em>Peignes de protection\/limitation :<\/em><\/strong> Il s'agit de plastiques encliquetables qui d\u00e9terminent la longueur de cheveux que la tondeuse va couper. Les longueurs peuvent varier de tr\u00e8s court \u00e0 long.<\/li>\n\n\n\n<li><strong><em>Bouton d'alimentation :<\/em><\/strong> Permet d'allumer ou d'\u00e9teindre l'appareil<\/li>\n\n\n\n<li><strong><em>Lien de transmission :<\/em><\/strong> C'est le m\u00e9canisme qui traduit l'\u00e9nergie du moteur en oscillation de la lame.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-client-requirements\">Exigences du client<\/h2>\n\n\n\n<p>Un fabricant de tondeuses \u00e0 cheveux s'est adress\u00e9 \u00e0 First Mold pour obtenir de l'aide dans les domaines suivants <a href=\"https:\/\/firstmold.com\/fr\/two-shot-injection-molding\/\" type=\"page\" id=\"4041\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>production de moules d'injection de pr\u00e9cision en deux temps<\/strong><\/a>. Selon le client, il construisait une usine de production de masse de tondeuses \u00e0 cheveux et cherchait une entreprise capable de l'aider \u00e0 produire des moules. Au cours de sa recherche d'une usine de production de masse de tondeuses \u00e0 cheveux en Chine, First Mold est apparu fr\u00e9quemment.<\/p>\n\n\n\n<p>Avant de s'asseoir pour discuter de leur projet, ils ont demand\u00e9 \u00e0 visiter l'usine et les installations technologiques de First Mold. Convaincus par ce qu'ils ont vu, ils ont trac\u00e9 les grandes lignes de leur projet \u00e0 venir. Alors que la majorit\u00e9 des fabricants de tondeuses \u00e0 cheveux se concentrent sur les produits pour adultes, ce client souhaitait cr\u00e9er un produit destin\u00e9 aux enfants.<\/p>\n\n\n\n<p>Comme ce client \u00e9tait nouveau dans l'industrie, il souhaitait \u00e9galement obtenir des conseils sur le meilleur mat\u00e9riau et le meilleur proc\u00e9d\u00e9 de moulage par injection pour construire les diff\u00e9rents composants de la tondeuse \u00e0 cheveux, en particulier les protections et le bo\u00eetier. Les autres exigences cl\u00e9s pour la tondeuse \u00e0 cheveux sont les suivantes :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>\u00c9paisseur de la paroi :<\/em><\/strong> 1,0 mm ou moins<\/li>\n\n\n\n<li><strong><em>Poids total du produit :<\/em><\/strong> 200g \u00e0 250g<\/li>\n\n\n\n<li><strong><em>Tol\u00e9rance aux pannes :<\/em><\/strong> Pas de bavures ni d'\u00e9clats<\/li>\n\n\n\n<li><strong><em>Traitement de surface :<\/em><\/strong> Impression sur soie<\/li>\n\n\n\n<li><strong><em>Tol\u00e9rance d'assemblage :<\/em><\/strong> \u00b10.0<em>5mm<\/em><\/li>\n\n\n\n<li><strong><em>Taux de rendement de la production de masse :<\/em><\/strong> \u226598%<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-challenges-and-solution\">D\u00e9fis et solutions<\/h2>\n\n\n\n<p>\u00c9tant donn\u00e9 que le fabricant de tondeuses \u00e0 cheveux cr\u00e9ait un produit sp\u00e9cialement con\u00e7u pour les enfants, il \u00e9tait extr\u00eamement important que les protections et le bo\u00eetier soient d\u00e9pourvus d'\u00e9clats ou de bavures en raison de la nature sensible de la peau des enfants. En effet, les bavures peuvent laisser de minuscules coupures sur la peau des enfants. Le client souhaitait \u00e9galement cr\u00e9er un produit l\u00e9ger. Il \u00e9tait donc important pour les ing\u00e9nieurs de First Mold de concevoir un produit l\u00e9ger.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-material-compatibility-for-2k-molding\">Compatibilit\u00e9 des mat\u00e9riaux pour le moulage 2K<\/h3>\n\n\n\n<p>Le deuxi\u00e8me d\u00e9fi que First Mold a d\u00fb relever en collaboration avec le fabricant de tondeuses \u00e0 cheveux consistait \u00e0 assurer la compatibilit\u00e9 des mat\u00e9riaux. La technique de production \u00e9tant le moulage par injection en deux temps (ou moulage 2K), il \u00e9tait important de s'assurer que les deux mat\u00e9riaux utilis\u00e9s pour le moulage \u00e9taient chimiquement compatibles pour garantir une bonne adh\u00e9rence.<\/p>\n\n\n\n<p>Le premier mat\u00e9riau doit r\u00e9sister \u00e0 la temp\u00e9rature du second, plus chaud, lors de l'injection par-dessus, sans se d\u00e9former ni fondre. Si les mat\u00e9riaux n'adh\u00e8rent pas correctement, la poign\u00e9e souple peut se d\u00e9coller \u00e0 l'usage. De m\u00eame, si le <a href=\"https:\/\/firstmold.com\/fr\/guides\/plastic-shrinkage\/\" type=\"post\" id=\"11677\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>taux de r\u00e9tr\u00e9cissement<\/strong><\/a> des mat\u00e9riaux rigides et souples diff\u00e8rent sensiblement, des d\u00e9formations ou des fissures peuvent se produire.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-intricate-hair-trimmer-mold-design\">Design complexe du moule de la tondeuse \u00e0 cheveux<\/h3>\n\n\n\n<p>Les <a href=\"https:\/\/firstmold.com\/fr\/tag\/mold-design\/\" type=\"post_tag\" id=\"61\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>conception de moules pour le moulage par injection en deux temps<\/strong><\/a> n\u00e9cessite g\u00e9n\u00e9ralement un outillage plus complexe de 30% \u00e0 50%. Par exemple, le moule doit \u00eatre con\u00e7u de mani\u00e8re \u00e0 permettre au premier coup de tourner vers la deuxi\u00e8me cavit\u00e9 pour le surmoulage. Il a \u00e9t\u00e9 n\u00e9cessaire de cr\u00e9er un moule avec une \u00e9paisseur de paroi uniforme pour assurer un refroidissement constant.<\/p>\n\n\n\n<p>Pour obtenir un refroidissement constant, les ing\u00e9nieurs de First Mold ont con\u00e7u des canaux de refroidissement avanc\u00e9s dans le moule. Cette \u00e9tape est \u00e9galement cruciale pour la stabilit\u00e9 dimensionnelle. La simulation CAO a \u00e9galement aid\u00e9 les ing\u00e9nieurs de First Mold \u00e0 placer les portes, <a href=\"https:\/\/firstmold.com\/fr\/guides\/mold-flow-analysis\/\" type=\"post\" id=\"11704\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>analyser l'\u00e9coulement du moule<\/strong><\/a>, et de d\u00e9tecter les d\u00e9formations potentielles avant la production.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/two-shot-mold-base-of-hair-trimmer.webp\" alt=\"base de la tondeuse \u00e0 cheveux moul\u00e9e en deux parties\" class=\"wp-image-14409\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/two-shot-mold-base-of-hair-trimmer.webp 600w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/two-shot-mold-base-of-hair-trimmer-300x200.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/two-shot-mold-base-of-hair-trimmer-18x12.webp 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">base de la tondeuse \u00e0 cheveux moul\u00e9e en deux parties<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-hair-trimmer-manufacturing-challenges-with-2k-molding\">D\u00e9fis de la fabrication de tondeuses \u00e0 cheveux avec le moulage 2K<\/h3>\n\n\n\n<p>Le moulage par injection en deux temps n\u00e9cessite g\u00e9n\u00e9ralement un temps de cycle plus long en raison des \u00e9tapes suppl\u00e9mentaires d'injection, de transfert et de refroidissement qui ont lieu dans la machine. En outre, les d\u00e9fauts sont g\u00e9n\u00e9ralement plus fr\u00e9quents, en particulier dans la zone o\u00f9 la deuxi\u00e8me injection rencontre la premi\u00e8re. Ce d\u00e9faut peut se traduire par l'apparition d'\u00e9clats, d'un enroulement ou d'un d\u00e9collement.<\/p>\n\n\n\n<p>La premi\u00e8re porte de tir peut laisser des marques. Toutefois, les ing\u00e9nieurs de First Mold ont veill\u00e9 \u00e0 ce que la conception du moule soit soigneusement r\u00e9alis\u00e9e de mani\u00e8re \u00e0 ce que le deuxi\u00e8me tir couvre toutes les marques laiss\u00e9es par la porte du premier tir. Cette conception a \u00e9galement permis d'\u00e9viter des retards de traitement et d'assemblage post-production co\u00fbteux, qui auraient co\u00fbt\u00e9 de l'argent au fabricant.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-designing-hair-trimmer-housing-for-lightweight\">Conception d'un bo\u00eetier de tondeuse \u00e0 cheveux l\u00e9ger<\/h3>\n\n\n\n<p>Pour respecter la limite de poids fix\u00e9e par le fabricant de tondeuses, chaque composant a d\u00fb \u00eatre con\u00e7u dans un souci de l\u00e9g\u00e8ret\u00e9. Par exemple, au lieu de parois \u00e9paisses pour le bo\u00eetier, les ing\u00e9nieurs de First Mold ont opt\u00e9 pour des parois minces renforc\u00e9es par des nervures.<\/p>\n\n\n\n<p>Pour garantir une r\u00e9sistance maximale, la g\u00e9om\u00e9trie des nervures a \u00e9t\u00e9 con\u00e7ue \u00e0 l'aide des \u00e9l\u00e9ments suivants <a href=\"https:\/\/firstmold.com\/fr\/tips\/nx-cad-vs-solidworks-vs-creo\/\" type=\"post\" id=\"23375\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Logiciel de CAO (SolidWorks)<\/strong><\/a>. Moldflow a \u00e9t\u00e9 utilis\u00e9 pour valider la conception en vue de la fabrication, afin de garantir une \u00e9paisseur uniforme et d'\u00e9viter les probl\u00e8mes de remplissage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-preventing-flash-or-burrs-in-trimmer-guard\">Pr\u00e9vention des \u00e9clats ou des bavures dans le carter de coupe<\/h3>\n\n\n\n<p>Plusieurs mesures ont \u00e9t\u00e9 prises pour \u00e9viter la formation de flash. La premi\u00e8re a \u00e9t\u00e9 l'optimisation du processus. Il s'agissait notamment d'optimiser la pression et la vitesse d'injection. Une pression excessive peut forcer le mat\u00e9riau fondu \u00e0 p\u00e9n\u00e9trer dans les plans de joint. La temp\u00e9rature de fusion a \u00e9galement \u00e9t\u00e9 optimis\u00e9e afin d'augmenter la viscosit\u00e9 des mat\u00e9riaux trop fluides.<\/p>\n\n\n\n<p>Lors de la conception du moule du bo\u00eetier de la tondeuse \u00e0 cheveux, les ing\u00e9nieurs de First Mold ont augment\u00e9 la force de serrage pour maintenir le moule herm\u00e9tiquement ferm\u00e9 contre la pression interne du plastique. Les plateaux de la machine \u00e9taient parall\u00e8les et correctement align\u00e9s pour \u00e9viter une pression de serrage in\u00e9gale.<\/p>\n\n\n\n<p>La combinaison de ces techniques a permis d'\u00e9liminer la formation de flashs et d'\u00e9pargner au fabricant de tondeuses \u00e0 cheveux des ressources pr\u00e9cieuses qui auraient \u00e9t\u00e9 consacr\u00e9es au traitement post-production. En outre, elle a permis de s\u00e9curiser l'utilisation du produit par le public cible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-creating-tight-tolerance-for-easy-assembly\">Cr\u00e9er des tol\u00e9rances \u00e9troites pour faciliter l'assemblage<\/h3>\n\n\n\n<p>Compte tenu de la tol\u00e9rance serr\u00e9e (\u00b10,05 mm) exig\u00e9e par le fabricant, les ing\u00e9nieurs de First Mold ont d\u00fb utiliser une combinaison de conception CAO pr\u00e9cise et d'usinage CNC pour cr\u00e9er les moules de tondeuses \u00e0 cheveux. Une tol\u00e9rance serr\u00e9e est essentielle pour garantir le bon fonctionnement des composants. Un \u00e9cart mineur peut entra\u00eener une d\u00e9faillance de l'assemblage, une rupture pr\u00e9matur\u00e9e ou des connexions faibles.<\/p>\n\n\n\n<p>Une tol\u00e9rance serr\u00e9e garantit que le crochet m\u00e2le et la cavit\u00e9 femelle s'alignent parfaitement \u00e0 chaque fois. Cela permet d'\u00e9viter que l'encliquetage soit trop l\u00e2che, ce qui entra\u00eenerait un cliquetis des pi\u00e8ces. Cela permet \u00e9galement d'\u00e9viter que l'encliquetage soit trop serr\u00e9, ce qui entra\u00eenerait une force d'assemblage excessive susceptible d'endommager les pi\u00e8ces.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/Mold-core-part-of-the-main-part.webp\" alt=\"Partie centrale du moule de la partie principale\" class=\"wp-image-14407\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/Mold-core-part-of-the-main-part.webp 600w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/Mold-core-part-of-the-main-part-300x200.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/Mold-core-part-of-the-main-part-18x12.webp 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">Partie centrale du moule de la partie principale<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-the-client-gained-by-embracing-first-mold-s-solutions\">Ce que le client a gagn\u00e9 en adoptant les solutions de First Mold<\/h2>\n\n\n\n<p>Lorsque le client est entr\u00e9 dans les locaux de First Mold, il ne savait pas tr\u00e8s bien quelle \u00e9tait la diff\u00e9rence entre une tondeuse \u00e0 cheveux et une tondeuse \u00e0 cheveux. De plus, il souhaitait utiliser un seul type de plastique pour toutes les pi\u00e8ces en plastique.<\/p>\n\n\n\n<p>Cependant, apr\u00e8s avoir communiqu\u00e9 avec l'\u00e9quipe de First Mold, compos\u00e9e d'ing\u00e9nieurs d\u00e9vou\u00e9s poss\u00e9dant des d\u00e9cennies d'exp\u00e9rience dans le domaine, ils ont d\u00e9couvert que ce n'\u00e9tait pas une bonne id\u00e9e. Au lieu de cela, diff\u00e9rents mat\u00e9riaux plastiques (ABS, PC, POM, PC+ABS et TPU) ont \u00e9t\u00e9 utilis\u00e9s pour diff\u00e9rents composants afin d'obtenir les meilleurs r\u00e9sultats.<\/p>\n\n\n\n<p>Bien que la cr\u00e9ation d'un moulage par injection en deux temps n\u00e9cessite davantage de comp\u00e9tences techniques, le fabricant de tondeuses \u00e0 cheveux a fait livrer son moule 2K avant le d\u00e9but pr\u00e9vu de la production en s\u00e9rie. La livraison dans les d\u00e9lais a permis au fabricant d'honorer les pr\u00e9commandes et d'atteindre l'objectif de la demande.<\/p>\n\n\n\n<p>L'utilisation d'un logiciel de simulation virtuelle a permis \u00e0 First Mold de limiter l'impact de ses activit\u00e9s sur l'environnement. <a href=\"https:\/\/firstmold.com\/fr\/guides\/what-is-mold-trial\/\" type=\"post\" id=\"19366\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>moulage d'essai<\/strong><\/a> Le nombre de tentatives est limit\u00e9 \u00e0 trois. Ce point \u00e9tait particuli\u00e8rement important, car les essais r\u00e9p\u00e9t\u00e9s prennent du temps et sont co\u00fbteux. La combinaison d'un outillage plus rapide et d'un nombre r\u00e9duit d'essais de moulage a permis de respecter le budget de l'ensemble du processus de fabrication de la tondeuse \u00e0 cheveux.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faq\">FAQ<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1770868280675\"><strong class=\"schema-faq-question\">Comment \u00e9viter le flash dans la fabrication de tondeuses \u00e0 cheveux par moulage par injection ?<\/strong> <p class=\"schema-faq-answer\">Un bon serrage et une r\u00e9duction de la vitesse et de la temp\u00e9rature d'injection pour augmenter la viscosit\u00e9 du plastique sont quelques-unes des \u00e9tapes n\u00e9cessaires pour r\u00e9duire ou \u00e9liminer l'apparition de la bavure. L'optimisation des conditions d'injection peut \u00eatre r\u00e9alis\u00e9e \u00e0 l'aide d'un logiciel de simulation.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1770868289238\"><strong class=\"schema-faq-question\">Quelle est la meilleure fa\u00e7on de concevoir des nervures dans les pi\u00e8ces en plastique ?<\/strong> <p class=\"schema-faq-answer\">Les nervures doivent \u00eatre aussi courtes que possible et ne doivent pas \u00eatre plus \u00e9paisses que 60% de l'\u00e9paisseur nominale de la paroi, en r\u00e8gle g\u00e9n\u00e9rale. Le maintien d'un rapport nervures\/paroi appropri\u00e9 est important pour \u00e9viter les mod\u00e8les de retrait, la concentration des contraintes et les bulles d'air.<\/p> <\/div> <\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>La fabrication sur mesure de tondeuses \u00e0 cheveux par FirstMold r\u00e9pond aux exigences strictes des clients en mati\u00e8re d'apparence et de performance. 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of injection molded hair trimmer","url":"","target":""}]]}},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.3 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Hair Trimmer Manufacturing By Two-shot Injection Molding<\/title>\n<meta name=\"description\" content=\"FirstMold offers electric, cordless, and precision hair trimmers. 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