{"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\/it\/case-study\/two-shot-injection-molding-for-precision-hair-trimmer-manufacturing\/","title":{"rendered":"Stampaggio a iniezione a due riprese per la produzione di tagliacapelli di precisione"},"content":{"rendered":"<p id=\"h-\">I trimmer sono strumenti importanti per la cura dei capelli. \u00c8 interessante notare che la maggior parte dei produttori \u00e8 bloccata nel decidere se produrre un tagliacapelli o un trimmer. Sebbene le due cose si assomiglino, il tagliacapelli ha lame pi\u00f9 grandi ed \u00e8 ideale per tagliare una grande quantit\u00e0 di capelli.<\/p>\n\n\n\n<p>Un tagliacapelli, invece, \u00e8 specializzato nel taglio dei capelli molto vicino alla cute. Hanno lame pi\u00f9 sottili e sono leggeri, il che li rende ideali per delineare, definire i dettagli, bordare e acconciare i capelli. I produttori di tagliacapelli realizzano questi prodotti soprattutto per la pulizia di scollature, basette o peli del viso. Le caratteristiche principali dei tagliacapelli includono:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>Maggiore precisione e dettagli:<\/em><\/strong> \u00c8 dotato di lame pi\u00f9 sottili che consentono di ottenere linee nitide e pulite.<\/li>\n\n\n\n<li><strong><em>Tagliare pi\u00f9 a fondo:<\/em><\/strong> Tagliano pi\u00f9 corti dei tagliacapelli, il che li rende perfetti per le barbe, i dettagli e la creazione di sfumature nette.<\/li>\n\n\n\n<li><strong><em>Pi\u00f9 leggero delle forbici:<\/em><\/strong> Sono stati progettati per essere pi\u00f9 compatti e leggeri, il che li rende pi\u00f9 facili da maneggiare e da usare per i dettagli pi\u00f9 complessi.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-crucial-parts-of-a-hair-trimmer\">Parti fondamentali di un tagliacapelli<\/h2>\n\n\n\n<p>Per le startup che vogliono entrare nel settore della produzione di tagliacapelli, \u00e8 importante conoscere i componenti di un tagliacapelli. I tagliacapelli sono costituiti da una serie di lame staccabili azionate da un motore. I componenti elettronici sono alloggiati in un involucro di plastica con un interruttore di alimentazione. Di seguito sono riportati i componenti principali di un tagliacapelli.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>Lame:<\/em><\/strong> \u00c8 la parte che esegue il taglio vero e proprio. Si compone di una lama fissa che funge da pettine e di una lama mobile che funge da taglierina. Le lame mobili vibrano l'una contro l'altra per tagliare i capelli.<\/li>\n\n\n\n<li><strong><em>Motore:<\/em><\/strong> Fornisce l'energia che aziona il movimento delle pale.<\/li>\n\n\n\n<li><strong><em>Alloggi:<\/em><\/strong> Il corpo \u00e8 l'involucro esterno che protegge i componenti interni dai danni provocati dagli urti e dagli elementi ambientali.<\/li>\n\n\n\n<li><strong><em>Protezioni\/pettini di limitazione:<\/em><\/strong> Si tratta di plastiche a scatto che determinano la lunghezza dei capelli che il rifinitore taglier\u00e0. Le lunghezze possono variare da molto corte a lunghe.<\/li>\n\n\n\n<li><strong><em>Pulsante di accensione:<\/em><\/strong> Utilizzato per accendere\/spegnere il dispositivo<\/li>\n\n\n\n<li><strong><em>Collegamento all'unit\u00e0:<\/em><\/strong> \u00c8 il meccanismo che traduce l'energia del motore in oscillazione della lama.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-client-requirements\">Requisiti del cliente<\/h2>\n\n\n\n<p>Un'azienda produttrice di tagliacapelli si \u00e8 rivolta a First Mold per avere assistenza con <a href=\"https:\/\/firstmold.com\/it\/two-shot-injection-molding\/\" type=\"page\" id=\"4041\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>produzione di stampi a iniezione di precisione a due colpi<\/strong><\/a>. Secondo il cliente, stava costruendo una fabbrica di produzione di massa di tagliacapelli ed era alla ricerca di un'azienda che lo assistesse nella produzione di stampi. Durante la ricerca di una fabbrica per la produzione in serie di tagliacapelli in Cina, First Mold \u00e8 stata citata spesso.<\/p>\n\n\n\n<p>Prima di sedersi per discutere del loro progetto imminente, hanno chiesto di visitare la fabbrica e l'impianto tecnologico di First Mold. Convinti da ci\u00f2 che hanno visto, hanno definito il piano del loro progetto imminente. Mentre la maggior parte dei produttori di tagliacapelli si concentra su prodotti per adulti, questo cliente voleva creare un prodotto pensato per i bambini.<\/p>\n\n\n\n<p>Poich\u00e9 il cliente era nuovo nel settore, voleva anche una consulenza sul materiale migliore e sul processo di stampaggio a iniezione per costruire i diversi componenti del tagliacapelli, in particolare le protezioni e l'alloggiamento. Altri requisiti chiave per il tagliacapelli sono:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>Spessore della parete:<\/em><\/strong> 1,0 mm o meno<\/li>\n\n\n\n<li><strong><em>Peso complessivo del prodotto:<\/em><\/strong> Da 200 a 250 g<\/li>\n\n\n\n<li><strong><em>Tolleranza ai guasti:<\/em><\/strong> Nessuna sbavatura o bava<\/li>\n\n\n\n<li><strong><em>Trattamento della superficie:<\/em><\/strong> Stampa su seta<\/li>\n\n\n\n<li><strong><em>Tolleranza di montaggio:<\/em><\/strong> \u00b10.0<em>5 mm<\/em><\/li>\n\n\n\n<li><strong><em>Tasso di rendimento della produzione di massa:<\/em><\/strong> \u226598%<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-challenges-and-solution\">Sfide e soluzioni<\/h2>\n\n\n\n<p>Poich\u00e9 il produttore di tagliacapelli stava creando un prodotto specificamente progettato per i bambini, era estremamente importante che le protezioni e l'alloggiamento fossero privi di scaglie o bave a causa della natura sensibile della pelle dei bambini. Il motivo \u00e8 che le bave possono lasciare piccoli tagli sulla pelle dei bambini. Inoltre, il cliente voleva creare un prodotto leggero. Pertanto, per gli ingegneri di First Mold \u00e8 stato importante progettare per alleggerire il prodotto.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-material-compatibility-for-2k-molding\">Compatibilit\u00e0 dei materiali per lo stampaggio 2K<\/h3>\n\n\n\n<p>La seconda sfida che First Mold ha dovuto superare in collaborazione con il produttore di tagliacapelli \u00e8 stata quella di garantire la compatibilit\u00e0 dei materiali. Poich\u00e9 la tecnica di produzione \u00e8 lo stampaggio a iniezione a due riprese (o stampaggio 2K), era importante garantire che i due materiali utilizzati per lo stampaggio fossero chimicamente compatibili per assicurare un'adeguata adesione.<\/p>\n\n\n\n<p>Il primo materiale deve resistere alla temperatura del secondo, pi\u00f9 caldo, durante l'iniezione, senza deformarsi o fondersi. Se i materiali non si legano correttamente, la presa soft-touch pu\u00f2 staccarsi durante l'uso. Inoltre, se il <a href=\"https:\/\/firstmold.com\/it\/guides\/plastic-shrinkage\/\" type=\"post\" id=\"11677\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>tassi di ritiro<\/strong><\/a> dei materiali rigidi e morbidi differiscono in modo significativo, possono verificarsi deformazioni o incrinature.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-intricate-hair-trimmer-mold-design\">Design intricato dello stampo per tagliacapelli<\/h3>\n\n\n\n<p>Il <a href=\"https:\/\/firstmold.com\/it\/tag\/mold-design\/\" type=\"post_tag\" id=\"61\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>progettazione dello stampo per lo stampaggio a iniezione a due riprese<\/strong><\/a> di solito richiede da 30% a 50% un'attrezzatura pi\u00f9 complessa. Ad esempio, lo stampo deve essere progettato in modo da consentire la rotazione del primo colpo verso la seconda cavit\u00e0 per il sovrastampaggio. \u00c8 stato necessario creare uno stampo con uno spessore uniforme delle pareti per garantire un raffreddamento costante.<\/p>\n\n\n\n<p>Per ottenere un raffreddamento costante, gli ingegneri di First Mold hanno progettato canali di raffreddamento avanzati nello stampo. Questo aspetto \u00e8 fondamentale anche per la stabilit\u00e0 dimensionale. La simulazione CAD ha aiutato gli ingegneri di First Mold anche nel posizionamento delle porte, <a href=\"https:\/\/firstmold.com\/it\/guides\/mold-flow-analysis\/\" type=\"post\" id=\"11704\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>analizzare il flusso dello stampo<\/strong><\/a>, e individuare potenziali deformazioni prima della produzione.<\/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 di stampo a due colpi del tagliacapelli\" 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 di stampo a due colpi del tagliacapelli<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-hair-trimmer-manufacturing-challenges-with-2k-molding\">Sfide di produzione dei tagliacapelli con stampaggio 2K<\/h3>\n\n\n\n<p>Lo stampaggio a iniezione a due riprese richiede di solito un tempo di ciclo pi\u00f9 lungo a causa delle fasi di iniezione, trasferimento e raffreddamento supplementari che avvengono all'interno della macchina. Inoltre, i difetti sono generalmente pi\u00f9 comuni, soprattutto nell'area in cui il secondo colpo incontra il primo. Questo difetto pu\u00f2 portare a scagliature, arricciamenti o spellature.<\/p>\n\n\n\n<p>La porta del primo colpo pu\u00f2 lasciare dei segni. Tuttavia, gli ingegneri di First Mold si sono assicurati che la progettazione dello stampo fosse fatta con attenzione, in modo che il secondo colpo coprisse qualsiasi segno lasciato dalla porta del primo colpo. Questa considerazione progettuale ha anche eliminato la necessit\u00e0 di costosi ritardi nella lavorazione e nell'assemblaggio in post-produzione, che sarebbero costati al produttore.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-designing-hair-trimmer-housing-for-lightweight\">Progettazione di alloggiamenti per tagliacapelli leggeri<\/h3>\n\n\n\n<p>Per rispettare i limiti di peso imposti dal produttore del tagliacapelli, ogni componente doveva essere progettato tenendo conto della leggerezza. Ad esempio, invece di pareti spesse per l'alloggiamento, gli ingegneri di First Mold hanno optato per pareti sottili rinforzate con nervature.<\/p>\n\n\n\n<p>Per garantire la massima resistenza, la geometria delle costole \u00e8 stata progettata utilizzando <a href=\"https:\/\/firstmold.com\/it\/tips\/nx-cad-vs-solidworks-vs-creo\/\" type=\"post\" id=\"23375\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Software CAD (SolidWorks)<\/strong><\/a>. Moldflow \u00e8 stato utilizzato per convalidare il progetto per la producibilit\u00e0, per garantire uno spessore uniforme ed evitare problemi di riempimento.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-preventing-flash-or-burrs-in-trimmer-guard\">Prevenzione di scintille o bave nella protezione del rifilatore<\/h3>\n\n\n\n<p>Sono state adottate diverse misure per prevenire la formazione di flash. La prima \u00e8 stata l'ottimizzazione del processo. Tra queste, l'ottimizzazione della pressione e della velocit\u00e0 di iniezione. Una pressione eccessiva pu\u00f2 forzare il materiale fuso nelle linee di separazione. Inoltre, la temperatura di fusione \u00e8 stata ottimizzata per aumentare la viscosit\u00e0 dei materiali troppo fluidi.<\/p>\n\n\n\n<p>Durante la progettazione dello stampo dell'alloggiamento del tagliacapelli, gli ingegneri di First Mold hanno aumentato la forza di serraggio per tenere lo stampo ben chiuso contro la pressione interna della plastica. I piani della macchina erano paralleli e correttamente allineati per evitare una pressione di serraggio non uniforme.<\/p>\n\n\n\n<p>La combinazione di queste tecniche ha eliminato la formazione di flash e ha fatto risparmiare al produttore di tagliacapelli preziose risorse che sarebbero state spese per l'elaborazione in post-produzione. Inoltre, ha reso il prodotto sicuro per l'uso da parte del pubblico di riferimento.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-creating-tight-tolerance-for-easy-assembly\">Creazione di tolleranze strette per un facile assemblaggio<\/h3>\n\n\n\n<p>Tenendo conto della stretta tolleranza (\u00b10,05 mm) richiesta dal produttore, gli ingegneri di First Mold hanno dovuto utilizzare una combinazione di progettazione CAD precisa e lavorazione CNC per creare gli stampi dei tagliacapelli. Le tolleranze strette sono fondamentali per garantire un funzionamento accurato dei componenti. Una piccola deviazione pu\u00f2 portare a guasti di assemblaggio, rotture premature o connessioni deboli.<\/p>\n\n\n\n<p>Una tolleranza ristretta garantisce che il gancio maschio e l'incavo femmina si allineino sempre perfettamente. In questo modo si evita una situazione in cui l'innesto a scatto \u00e8 troppo allentato, con conseguente tintinnio dei componenti. Si evita anche che l'innesto a scatto sia troppo stretto, con conseguente forza di montaggio eccessiva che potrebbe danneggiare i componenti.<\/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=\"Parte centrale dello stampo della parte 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\">Parte centrale dello stampo della parte principale<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-the-client-gained-by-embracing-first-mold-s-solutions\">Cosa ha guadagnato il cliente adottando le soluzioni di First Mold<\/h2>\n\n\n\n<p>Quando il cliente \u00e8 entrato nella sede di First Mold, non aveva ben chiara la differenza tra un tagliacapelli e un rifinitore. Inoltre, volevano utilizzare un unico tipo di plastica per tutte le diverse parti in plastica.<\/p>\n\n\n\n<p>Tuttavia, dopo aver comunicato con il team First Mold di ingegneri dedicati con decenni di esperienza nel settore, hanno scoperto che non era un'idea favorevole. Invece, per ottenere i migliori risultati, sono stati scelti diversi materiali plastici (ABS, PC, POM, PC+ABS e TPU) per i vari componenti.<\/p>\n\n\n\n<p>Sebbene la creazione di stampi a iniezione a due colpi richieda maggiori competenze tecniche, il produttore di tagliacapelli si \u00e8 fatto consegnare lo stampo 2K prima dell'inizio previsto della produzione di massa. La consegna tempestiva ha permesso al produttore di soddisfare i preordini e di rispettare l'obiettivo della domanda.<\/p>\n\n\n\n<p>L'uso di un software di simulazione virtuale ha permesso a First Mold di limitare i costi di produzione. <a href=\"https:\/\/firstmold.com\/it\/guides\/what-is-mold-trial\/\" type=\"post\" id=\"19366\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>stampaggio di prova<\/strong><\/a> tentativi per un massimo di tre volte. Questo \u00e8 stato particolarmente importante perch\u00e9 i tentativi ripetuti richiedono tempo e costi elevati. La combinazione di una lavorazione pi\u00f9 rapida e di una riduzione dei tentativi di stampaggio ha garantito il rispetto del budget per l'intero processo di produzione dei tagliacapelli.<\/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\">Come si evita il flash nella produzione di tagliacapelli tramite stampaggio a iniezione?<\/strong> <p class=\"schema-faq-answer\">Un corretto serraggio e la riduzione della velocit\u00e0 e della temperatura di iniezione per aumentare la viscosit\u00e0 della plastica sono alcuni dei passi necessari per ridurre o eliminare il verificarsi del flash. L'ottimizzazione delle condizioni di iniezione pu\u00f2 essere ottenuta utilizzando un software di simulazione.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1770868289238\"><strong class=\"schema-faq-question\">Qual \u00e8 il modo migliore per progettare le nervature nelle parti in plastica?<\/strong> <p class=\"schema-faq-answer\">Le nervature devono essere il pi\u00f9 corte possibile e non devono essere pi\u00f9 spesse di 60% dello spessore nominale della parete, come regola generale. Il mantenimento di un rapporto adeguato tra nervature e parete \u00e8 importante per evitare fenomeni di ritiro, concentrazione di tensioni e bolle d'aria.<\/p> <\/div> <\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>La produzione di tagliacapelli personalizzati di FirstMold soddisfa i severi requisiti dei clienti in termini di aspetto e prestazioni. Questo \u00e8 un caso.<\/p>","protected":false},"author":2,"featured_media":14404,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"case-study-category":[66],"case-study-tag":[77],"class_list":["post-14402","case-study","type-case-study","status-publish","has-post-thumbnail","hentry","case-study-category-injection-molding-cases","case-study-tag-personal-care"],"acf":{"photo_gallery":{"case_study_gallery":[[{"id":35794,"title":"Injection-molded main body of the hair trimmer","caption":"","full_image_url":"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/Injection-molded-main-body-of-the-hair-trimmer.webp","thumbnail_image_url":"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/Injection-molded-main-body-of-the-hair-trimmer-150x150.webp","large_srcset":"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/02\/Injection-molded-main-body-of-the-hair-trimmer.webp 1000w, 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