{"id":10889,"date":"2026-02-27T05:57:20","date_gmt":"2026-02-27T05:57:20","guid":{"rendered":"https:\/\/ideal-pro.com\/?p=10889"},"modified":"2026-02-27T06:49:13","modified_gmt":"2026-02-27T06:49:13","slug":"causes-of-color-streaks-in-injection-molding-parts-how-to-fix-them","status":"publish","type":"post","link":"https:\/\/ideal-pro.com\/fr\/causes-des-stries-de-couleur-dans-les-pieces-moulees-par-injection-comment-les-reparer\/","title":{"rendered":"Causes des stries de couleur dans les pi\u00e8ces moul\u00e9es par injection et comment y rem\u00e9dier"},"content":{"rendered":"<p>Les stries de couleur sont l'un des d\u00e9fauts visuels les plus courants chez les personnes \u00e2g\u00e9es. <a href=\"https:\/\/ideal-pro.com\/fr\/pbt-injection-moulding-key-process-conditions-practical-guidelines\/\" target=\"_blank\" rel=\"noopener noreferrer\">moulage par injection<\/a><sup id=\"fnref-1\"><a href=\"#fn-1\" class=\"footnote-ref\">1<\/a><\/sup>, en particulier pour les parties color\u00e9es avec <strong>m\u00e9lange ma\u00eetre de couleurs<\/strong>. Bien que les m\u00e9langes-ma\u00eetres offrent une meilleure homog\u00e9n\u00e9it\u00e9 de la couleur, une plus grande puret\u00e9 et une meilleure performance anti-migration que les poudres de couleur s\u00e8ches ou les p\u00e2tes de couleur liquides, ils souffrent souvent d'une dispersion insuffisante.<\/p>\n<p>En termes simples, le m\u00e9lange ma\u00eetre de couleur peut ne pas se m\u00e9langer uniform\u00e9ment \u00e0 la r\u00e9sine brute pendant le processus de fusion et de transport. Cette r\u00e9partition in\u00e9gale se traduit directement par des diff\u00e9rences de couleur, des stries ou des rayures perceptibles sur les pi\u00e8ces moul\u00e9es finales.<\/p>\n<p>Vous trouverez ci-dessous une analyse professionnelle des principales causes et des solutions efficaces pour \u00e9liminer les stries de couleur dans les cheveux. <a href=\"https:\/\/ideal-pro.com\/fr\/pbt-injection-moulding-key-process-conditions-practical-guidelines\/\" target=\"_blank\" rel=\"noopener noreferrer\">moulage par injection<\/a><sup id=\"fnref-1\"><a href=\"#fn-1\" class=\"footnote-ref\">1<\/a><\/sup>.<\/p>\n<h2>Principales causes des stries de couleur<\/h2>\n<p>Les stries de couleur sont principalement dues \u00e0 :<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/ideal-pro.com\/wp-content\/uploads\/2026\/02\/poor-masterbatch-dispersion.jpg\" alt=\"mauvaise dispersion des m\u00e9langes-ma\u00eetres\"><\/p>\n<ul>\n<li><strong>Mauvaise dispersion du m\u00e9lange ma\u00eetre de couleur<\/strong>: Le concentr\u00e9 de couleur ne fond pas compl\u00e8tement et ne se m\u00e9lange pas avec le polym\u00e8re de base.<\/li>\n<li><strong>Fusion insuffisante dans la zone d'alimentation<\/strong>: Les basses temp\u00e9ratures ralentissent la fusion du m\u00e9lange-ma\u00eetre, ce qui entra\u00eene un m\u00e9lange in\u00e9gal.<\/li>\n<li><strong>Contre-pression et cisaillement insuffisants<\/strong>: La faible force de cisaillement limite l'homog\u00e9n\u00e9isation de la mati\u00e8re fondue.<\/li>\n<li><strong>Conception d\u00e9raisonnable des barri\u00e8res et des couloirs<\/strong>: Une grille inadapt\u00e9e provoque de faibles turbulences et un \u00e9coulement non uniforme.<\/li>\n<\/ul>\n<h2>Des solutions efficaces pour \u00e9liminer les traces de couleur<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/ideal-pro.com\/wp-content\/uploads\/2026\/02\/gate-design-improvement.jpg\" alt=\"am\u00e9lioration de la conception du portail\"><\/p>\n<h3>1. Optimiser la temp\u00e9rature de la zone d'alimentation<\/h3>\n<p>Increase the temperature in the feed zone, especially the rear feed zone, to a level close to or slightly higher than the melting zone. This helps the color masterbatch melt faster when entering the melting section, improving liquid&#8209;phase mixing and uniformity.<\/p>\n<h3>2. Augmenter correctement la contre-pression<\/h3>\n<p>Avec une vitesse de vis stable, augmentez correctement la contre-pression. Une contre-pression plus \u00e9lev\u00e9e augmente la temp\u00e9rature de fusion et renforce l'action de cisaillement \u00e0 l'int\u00e9rieur du cylindre, ce qui am\u00e9liore consid\u00e9rablement la dispersion du m\u00e9lange-ma\u00eetre color\u00e9.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/ideal-pro.com\/wp-content\/uploads\/2026\/02\/optimized-feed-zone-tempreature.jpg\" alt=\"temp\u00e9rature optimis\u00e9e de la zone d&#039;alimentation\"><\/p>\n<h3>3. Ajustez le syst\u00e8me de fermeture des moules<\/h3>\n<p>Examinez et modifiez le syst\u00e8me de coul\u00e9e du moule. Une porte trop large entra\u00eene de faibles turbulences, une faible production de chaleur et un \u00e9coulement irr\u00e9gulier de la mati\u00e8re fondue, ce qui est directement \u00e0 l'origine des stries de couleur. Le r\u00e9tr\u00e9cissement de la porte peut am\u00e9liorer la turbulence de la mati\u00e8re fondue, l'\u00e9l\u00e9vation de la temp\u00e9rature et l'homog\u00e9n\u00e9it\u00e9 de la couleur.<\/p>\n<h2>Conclusion<\/h2>\n<p>Les stries de couleur dans les produits moul\u00e9s par injection sont souvent li\u00e9es \u00e0 <strong>dispersion des mat\u00e9riaux<\/strong>, <strong>param\u00e8tres de traitement<\/strong>, et <strong>conception de moules<\/strong>. En optimisant la temp\u00e9rature du tonneau, la contre-pression et la structure de la porte, vous pouvez \u00e9liminer efficacement les stries de couleur et am\u00e9liorer la qualit\u00e9 de l'aspect et la stabilit\u00e9 des pi\u00e8ces moul\u00e9es par injection.<\/p>\n<hr><div class=\"footnotes\"><hr><ol><li id=\"fn-1\"><p>Explorez cette ressource pour d\u00e9couvrir des techniques d'experts qui am\u00e9liorent la qualit\u00e9 du moulage par injection et minimisent les d\u00e9fauts.\r <a href=\"#fnref-1\" class=\"footnote-backref\">\u21a9<\/a><\/p><\/li><\/ol><\/div>","protected":false},"excerpt":{"rendered":"<p>Color streaks are one of the most common visual defects in injection molding1, especially for parts colored with color masterbatch. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":10896,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Causes of Color Streaks in Injection Molding Parts & How to Fix Them","_seopress_titles_desc":"Learn the main causes of color streaks in injection molding parts (color masterbatch dispersion, temperature, back pressure, mold design) & effective solutions to fix color stripes permanently.","_seopress_robots_index":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[21],"tags":[86,84,85],"class_list":["post-10889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-color-masterbatch-dispersion-issues","tag-color-streaks-in-injection-molding","tag-injection-molded-parts-color-defects"],"acf":[],"_links":{"self":[{"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/posts\/10889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/comments?post=10889"}],"version-history":[{"count":5,"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/posts\/10889\/revisions"}],"predecessor-version":[{"id":10900,"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/posts\/10889\/revisions\/10900"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/media\/10896"}],"wp:attachment":[{"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/media?parent=10889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/categories?post=10889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ideal-pro.com\/fr\/wp-json\/wp\/v2\/tags?post=10889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}