{"id":19377,"date":"2024-05-07T15:49:17","date_gmt":"2024-05-07T07:49:17","guid":{"rendered":"https:\/\/firstmold.com\/?p=19377"},"modified":"2025-07-18T11:56:53","modified_gmt":"2025-07-18T03:56:53","slug":"flash-in-injection-molding","status":"publish","type":"post","link":"https:\/\/firstmold.com\/es\/tips\/flash-in-injection-molding\/","title":{"rendered":"Flash en el moldeo por inyecci\u00f3n An\u00e1lisis y soluciones | Defectos en el moldeo por inyecci\u00f3n"},"content":{"rendered":"<p><a href=\"https:\/\/firstmold.com\/es\/tips\/injection-molding-defects\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Defectos de moldeo por inyecci\u00f3n<\/strong><\/a> son problemas que toda f\u00e1brica de moldeo por inyecci\u00f3n puede encontrar durante el proceso de moldeo. La rebaba es un defecto com\u00fan en el moldeo por inyecci\u00f3n.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/The-appearance-of-common-flash-in-injection-molding-production.webp\" alt=\"La aparici\u00f3n de flash com\u00fan en la producci\u00f3n de moldeo por inyecci\u00f3n\" class=\"wp-image-31388\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/The-appearance-of-common-flash-in-injection-molding-production.webp 1200w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/The-appearance-of-common-flash-in-injection-molding-production-300x169.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/The-appearance-of-common-flash-in-injection-molding-production-1024x576.webp 1024w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/The-appearance-of-common-flash-in-injection-molding-production-768x432.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/The-appearance-of-common-flash-in-injection-molding-production-18x10.webp 18w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/The-appearance-of-common-flash-in-injection-molding-production-600x338.webp 600w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p>Para los dise\u00f1adores de productos o estructuras, comprender los defectos de rebabas y otros defectos del moldeo por inyecci\u00f3n les ayuda a mejorar sus m\u00e9todos de dise\u00f1o y a aceptar los productos acabados o las piezas de las f\u00e1bricas de moldeo por inyecci\u00f3n (consulte las normas de aceptaci\u00f3n del moldeo por inyecci\u00f3n).<\/p>\n\n\n\n<p>Para las f\u00e1bricas de moldes y moldeo por inyecci\u00f3n, analizar el flash y resolver este defecto a la perfecci\u00f3n es una habilidad fundamental. Todo profesional del moldeado y del moldeo por inyecci\u00f3n tiene la responsabilidad y la obligaci\u00f3n de dominar todos los defectos del moldeo por inyecci\u00f3n.<\/p>\n\n\n\n<p>A continuaci\u00f3n encontrar\u00e1 una tabla de defectos comunes del moldeo por inyecci\u00f3n y sus enlaces, que los amigos interesados pueden consultar para comprenderlos en profundidad:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th class=\"has-text-align-center\" data-align=\"center\" colspan=\"5\">Comprender los diferentes defectos del moldeo por inyecci\u00f3n<\/th><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Flash<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/short-shot-in-injection-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Tiro corto<\/strong><\/a><\/td><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/sink-marks\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Marca del fregadero<\/strong><\/a><\/td><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/warpage-in-injection-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Deformaci\u00f3n<\/strong><\/a><\/td><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/burn-marks\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Marca de quemadura<\/strong><\/a><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/splay-marks-silver-streaks-in-injeciton-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Splay Mark\/Silver Streak<\/strong><\/a><\/td><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/black-spots-and-black-specks\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Mancha oscura\/mancha negra<\/strong><\/a><\/td><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/flow-marks\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Marca de flujo<\/strong><\/a><\/td><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/bubbles\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Burbuja<\/strong><\/a><\/td><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/weld-lines\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>L\u00ednea de soldadura<\/strong><\/a><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><a href=\"https:\/\/firstmold.com\/es\/tips\/uneven-color-and-color-difference\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Diferencia de color\/Color desigual<\/strong><\/a><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong><a href=\"https:\/\/firstmold.com\/es\/tips\/ejector-pin-marks\/\" target=\"_blank\" rel=\"noreferrer noopener\">Marca del pasador eyector<\/a><\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-flash-in-injection-molding\">\u00bfQu\u00e9 es la rebaba en el moldeo por inyecci\u00f3n?<\/h2>\n\n\n\n<p>El destello en las piezas de pl\u00e1stico, tambi\u00e9n conocido como rebaba o rebaba, se refiere al material extra producido durante el proceso de moldeo cuando la masa fundida de pl\u00e1stico entra en el hueco del molde. Este material extra suele estar situado en el borde o la superficie de la pieza de pl\u00e1stico y tiene un aspecto afilado, de ah\u00ed el nombre de \"rebaba\", como se muestra en la imagen inferior:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"1000\" height=\"489\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/flash-in-injection-molded-plastic-parts.webp\" alt=\"flash en piezas de pl\u00e1stico moldeadas por inyecci\u00f3n\" class=\"wp-image-19379\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/flash-in-injection-molded-plastic-parts.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/flash-in-injection-molded-plastic-parts-300x147.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/flash-in-injection-molded-plastic-parts-768x376.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/flash-in-injection-molded-plastic-parts-18x9.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">flash en piezas de pl\u00e1stico moldeadas por inyecci\u00f3n<\/figcaption><\/figure>\n\n\n\n<p>Las rebabas en las piezas de pl\u00e1stico se producen sobre todo en la posici\u00f3n de separaci\u00f3n del molde, como la superficie de separaci\u00f3n del molde, el ajuste deslizante del <a href=\"https:\/\/firstmold.com\/es\/guides\/what-is-an-injection-mold-slider\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>deslizador<\/strong><\/a>el hueco del <a href=\"https:\/\/firstmold.com\/es\/guides\/mold-inserts\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>inserte<\/strong><\/a>y el agujero del <a href=\"https:\/\/firstmold.com\/es\/guides\/ejector-pin\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>pasador eyector<\/strong><\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-the-impact-of-flash-on-plastic-parts\">El impacto del flash en las piezas de pl\u00e1stico<\/h3>\n\n\n\n<p>La presencia de rebabas puede afectar a la calidad y el aspecto de las piezas de pl\u00e1stico, e incluso puede repercutir en su rendimiento y vida \u00fatil. Si estos reboses no se resuelven a tiempo, seguir\u00e1n expandi\u00e9ndose, imprimiendo el molde y causando hundimientos localizados, lo que provocar\u00e1 da\u00f1os permanentes. Las rebabas en el hueco de inserci\u00f3n y en el orificio del pasador expulsor tambi\u00e9n pueden hacer que la pieza se atasque en el molde, afectando a <a href=\"https:\/\/firstmold.com\/es\/tips\/demolding-process\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>desmoldeo<\/strong><\/a>. Por lo tanto, es necesario tomar medidas durante la producci\u00f3n de piezas de pl\u00e1stico para controlar y reducir la aparici\u00f3n de rebabas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-acceptance-standards-for-flash-on-plastic-parts\">Normas de aceptaci\u00f3n de rebabas en piezas de pl\u00e1stico<\/h3>\n\n\n\n<p>En sentido estricto, el destello es inevitable, pero la mayor\u00eda de los desbordamientos de pl\u00e1stico son insignificantes. Por lo tanto, es necesario establecer una cierta norma como referencia a la hora de aceptar piezas de pl\u00e1stico. En general, para los productos con requisitos elevados, el destello no debe superar el <strong>0,05 mm<\/strong>En el caso de los productos con menos requisitos, el destello no debe ser superior a <strong>0,1 mm<\/strong>. La norma de aceptaci\u00f3n debe confirmarse bas\u00e1ndose en el uso real del producto.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Acceptance-Criteria-for-Flash-During-Customer-Inspection-of-Injection-Molded-Products.webp\" alt=\"Criterios de aceptaci\u00f3n de rebabas durante la inspecci\u00f3n por parte del cliente de productos moldeados por inyecci\u00f3n\" class=\"wp-image-31386\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Acceptance-Criteria-for-Flash-During-Customer-Inspection-of-Injection-Molded-Products.webp 1280w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Acceptance-Criteria-for-Flash-During-Customer-Inspection-of-Injection-Molded-Products-300x169.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Acceptance-Criteria-for-Flash-During-Customer-Inspection-of-Injection-Molded-Products-1024x576.webp 1024w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Acceptance-Criteria-for-Flash-During-Customer-Inspection-of-Injection-Molded-Products-768x432.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Acceptance-Criteria-for-Flash-During-Customer-Inspection-of-Injection-Molded-Products-18x10.webp 18w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Acceptance-Criteria-for-Flash-During-Customer-Inspection-of-Injection-Molded-Products-600x338.webp 600w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-causes-and-solutions-for-flash-in-injection-molding\">Causas y soluciones de las rebabas en el moldeo por inyecci\u00f3n<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Four-Common-Factors-Causing-Flash-in-Injection-Molding.webp\" alt=\"Cuatro factores comunes que provocan rebabas en el moldeo por inyecci\u00f3n\" class=\"wp-image-31387\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Four-Common-Factors-Causing-Flash-in-Injection-Molding.webp 1280w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Four-Common-Factors-Causing-Flash-in-Injection-Molding-300x169.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Four-Common-Factors-Causing-Flash-in-Injection-Molding-1024x576.webp 1024w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Four-Common-Factors-Causing-Flash-in-Injection-Molding-768x432.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Four-Common-Factors-Causing-Flash-in-Injection-Molding-18x10.webp 18w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Four-Common-Factors-Causing-Flash-in-Injection-Molding-600x338.webp 600w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-material-factors\">1. Factores materiales<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-analysis\">An\u00e1lisis:<\/h4>\n\n\n\n<p>\u2460 El pl\u00e1stico tiene una fluidez demasiado buena y la viscosidad de fusi\u00f3n es demasiado baja, por lo que es propenso a la formaci\u00f3n de flash. Por ejemplo, el polietileno (PE) y el polipropileno (PP). <\/p>\n\n\n\n<p>\u2461 La materia prima pl\u00e1stica tiene una granularidad desigual, lo que da lugar a una alimentaci\u00f3n inestable, provocando un llenado incompleto o destellos. <\/p>\n\n\n\n<p>\u2462 Las materias primas pl\u00e1sticas con alta absorci\u00f3n de agua se descomponen a altas temperaturas, reduciendo la viscosidad de la masa fundida y provocando destellos, como PA, ABS, PC, PMMA, etc.<\/p>\n\n\n\n<p><em>Consejos: Haga clic en los enlaces para consultar informaci\u00f3n sobre \"<a href=\"https:\/\/firstmold.com\/es\/pe-injection-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Moldeo por inyecci\u00f3n de PE<\/strong><\/a>\u201c, \u201c<a href=\"https:\/\/firstmold.com\/es\/pp-injection-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Moldeo por inyecci\u00f3n de PP<\/strong><\/a>\u201c, \u201c<a href=\"https:\/\/firstmold.com\/es\/pa-injection-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Moldeo por inyecci\u00f3n de PA<\/strong><\/a>\u201c, \u201c<a href=\"https:\/\/firstmold.com\/es\/abs-injection-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Moldeo por inyecci\u00f3n de ABS<\/strong><\/a>\u201c, \u201c<a href=\"https:\/\/firstmold.com\/es\/pc-injection-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Moldeo por inyecci\u00f3n de PC<\/strong><\/a>\", y \"<a href=\"https:\/\/firstmold.com\/es\/pmma-injection-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Moldeo por inyecci\u00f3n de PMMA<\/strong><\/a>\".<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-solution\">Soluci\u00f3n:<\/h4>\n\n\n\n<p>\u2776 Cambie el material o a\u00f1ada aditivos para reducir la fluidez. <\/p>\n\n\n\n<p>\u2777 Utilice materiales de granularidad uniforme.<\/p>\n\n\n\n<p>Las causas relacionadas con los materiales exigen que los dise\u00f1adores de productos o los profesionales del molde comprendan las caracter\u00edsticas de la mayor\u00eda de los materiales. La tabla siguiente muestra la fluidez de los pl\u00e1sticos m\u00e1s utilizados:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Nombre del material<\/th><th>Fluidez<\/th><\/tr><\/thead><tbody><tr><td>Polietileno (PE)<\/td><td>Alta<\/td><\/tr><tr><td>Polipropileno (PP)<\/td><td>Alta<\/td><\/tr><tr><td>Poliestireno (PS)<\/td><td>Alta<\/td><\/tr><tr><td>Acrilonitrilo butadieno estireno (ABS)<\/td><td>Medio<\/td><\/tr><tr><td>Poliamida (PA)<\/td><td>Medio<\/td><\/tr><tr><td>Policarbonato (PC<a href=\"https:\/\/firstmold.com\/es\/guides\/pc-plastic\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>)<\/strong><\/a><\/td><td>Medio<\/td><\/tr><tr><td>Polioximetileno (POM)<\/td><td>Medio<\/td><\/tr><tr><td>Tereftalato de polietileno (PET)<\/td><td>Medio<\/td><\/tr><tr><td>Tereftalato de polibutileno (PBT)<\/td><td>Medio<\/td><\/tr><tr><td>Poliuretano (PU)<\/td><td>Medio<\/td><\/tr><tr><td>Cloruro de polivinilo (PVC)<\/td><td>Bajo<\/td><\/tr><tr><td>Cloruro de polivinilideno (PVDC)<\/td><td>Bajo<\/td><\/tr><tr><td>Acetato de polivinilo (PVA)<\/td><td>Bajo<\/td><\/tr><tr><td>Polimetilmetacrilato (PMMA)<\/td><td>Bajo<\/td><\/tr><tr><td>Polipropileno etileno copol\u00edmero (PPE)<\/td><td>Medio<\/td><\/tr><tr><td>Polisulfona (PSU)<\/td><td>Medio<\/td><\/tr><tr><td>Polieteretercetona (PEEK)<\/td><td>Bajo<\/td><\/tr><tr><td>Polidimetilsiloxano (PDMS)<\/td><td>Bajo<\/td><\/tr><tr><td>Etilvinilacetato (EVA)<\/td><td>Medio<\/td><\/tr><tr><td>Elast\u00f3mero termopl\u00e1stico (TPE)<\/td><td>Alta<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-mold-factors\">2. Factores del moho<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-analysis-0\">An\u00e1lisis:<\/h4>\n\n\n\n<p>\u2460 La precisi\u00f3n de la superficie de separaci\u00f3n del molde es deficiente.<\/p>\n\n\n\n<p>La placa m\u00f3vil est\u00e1 deformada y alabeada, hay cuerpos extra\u00f1os pegados en la superficie de separaci\u00f3n o rebabas salientes alrededor de la base del molde. El molde viejo tiene hundimientos por fatiga alrededor de la cavidad debido a un exprimido previo.<\/p>\n\n\n\n<p>\u2461 El <a href=\"https:\/\/firstmold.com\/es\/tag\/mold-design\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>dise\u00f1o de moldes<\/strong><\/a> no es razonable.<\/p>\n\n\n\n<p>El dise\u00f1o de la cavidad est\u00e1 desalineado, lo que provoca tensi\u00f3n en un lado del molde durante la inyecci\u00f3n, dando lugar a rebabas.<\/p>\n\n\n\n<p>\u2462 El molde tiene un paralelismo deficiente, est\u00e1 montado de forma no paralela, la placa no es paralela o los tirantes tienen una distribuci\u00f3n desigual de la fuerza y una deformaci\u00f3n desigual, todo lo cual provoca un cierre incompleto del molde, con la consiguiente formaci\u00f3n de rebabas. <\/p>\n\n\n\n<p>\u2463 La precisi\u00f3n de ajuste del n\u00facleo deslizante es deficiente, y el n\u00facleo fijo y la cavidad est\u00e1n desalineados, lo que provoca rebabas. En los moldes con varias cavidades, si las gu\u00edas y las compuertas no est\u00e1n dise\u00f1adas razonablemente, las fuerzas de llenado desiguales tambi\u00e9n provocar\u00e1n rebabas. <\/p>\n\n\n\n<p>\u2464 El n\u00famero de compuertas es demasiado escaso.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-solution-0\">Soluci\u00f3n: <\/h4>\n\n\n\n<p>\u2776 Mejorar la precisi\u00f3n de procesamiento y engrosar la placa del molde. <\/p>\n\n\n\n<p>\u2777 Ajuste la colocaci\u00f3n del producto. <\/p>\n\n\n\n<p>\u2778 Mejore la precisi\u00f3n de procesamiento y aumente la precisi\u00f3n de prueba del molde; mejore la precisi\u00f3n de ensamblaje del molde, utilizando el accesorio de plomo rojo o de plomo azul. <\/p>\n\n\n\n<p>\u2779 Mejorar la precisi\u00f3n de procesamiento y aumentar la precisi\u00f3n de prueba del molde; mejorar la precisi\u00f3n de montaje del molde, utilizando plomo rojo o plomo azul de ajuste. <\/p>\n\n\n\n<p>\u277a Aumente el n\u00famero de compuertas o cambie su posici\u00f3n.<\/p>\n\n\n\n<p>El destello causado por este factor afecta a la disposici\u00f3n de los canales en el dise\u00f1o del molde. <\/p>\n\n\n\n<p><em>Para m\u00e1s detalles, consulte el art\u00edculo \"<a href=\"https:\/\/firstmold.com\/es\/guides\/mold-runner\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Dise\u00f1o del canal de moldeo<\/strong><\/a>.\u201d<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-reasonable-runner-design-to-solve-flash-problems\">Dise\u00f1o de corredor razonable para resolver los problemas de flash<\/h4>\n\n\n\n<p>2.1 Buscar el equilibrio y la simetr\u00eda<\/p>\n\n\n\n<p>\u2776 Todas las cavidades deben llenarse simult\u00e1neamente a la misma temperatura<\/p>\n\n\n\n<p>a. Utilice una disposici\u00f3n equilibrada<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"399\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/A-balanced-layout-to-avoid-burrs.webp\" alt=\"Una disposici\u00f3n equilibrada para evitar rebabas\" class=\"wp-image-19380\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/A-balanced-layout-to-avoid-burrs.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/A-balanced-layout-to-avoid-burrs-300x120.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/A-balanced-layout-to-avoid-burrs-768x306.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/A-balanced-layout-to-avoid-burrs-18x7.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">Una disposici\u00f3n equilibrada para evitar rebabas<\/figcaption><\/figure>\n\n\n\n<p>b. La disposici\u00f3n no equilibrada puede lograr el equilibrio ajustando el tama\u00f1o de la puerta<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"521\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Non-balanced-layout-can-achieve-balance-by-adjusting-the-gate-size.webp\" alt=\"La disposici\u00f3n no equilibrada puede lograr el equilibrio ajustando el tama\u00f1o de la puerta\" class=\"wp-image-19381\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Non-balanced-layout-can-achieve-balance-by-adjusting-the-gate-size.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Non-balanced-layout-can-achieve-balance-by-adjusting-the-gate-size-300x156.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Non-balanced-layout-can-achieve-balance-by-adjusting-the-gate-size-768x400.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Non-balanced-layout-can-achieve-balance-by-adjusting-the-gate-size-18x9.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p>\u2777 Balance de puertas<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"241\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Gate-balance-to-avoid-burrs-in-injection-molding.webp\" alt=\"Equilibrio de compuertas para evitar rebabas en el moldeo por inyecci\u00f3n\" class=\"wp-image-19382\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Gate-balance-to-avoid-burrs-in-injection-molding.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Gate-balance-to-avoid-burrs-in-injection-molding-300x72.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Gate-balance-to-avoid-burrs-in-injection-molding-768x185.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Gate-balance-to-avoid-burrs-in-injection-molding-18x4.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">Equilibrio de compuertas para evitar rebabas en el moldeo por inyecci\u00f3n<\/figcaption><\/figure>\n\n\n\n<p>\u2778 Disposici\u00f3n sim\u00e9trica de productos grandes y peque\u00f1os<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"412\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Symmetrical-arrangement-to-avoid-burrs.webp\" alt=\"Disposici\u00f3n sim\u00e9trica para evitar rebabas\" class=\"wp-image-19383\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Symmetrical-arrangement-to-avoid-burrs.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Symmetrical-arrangement-to-avoid-burrs-300x124.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Symmetrical-arrangement-to-avoid-burrs-768x316.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Symmetrical-arrangement-to-avoid-burrs-18x7.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">Disposici\u00f3n sim\u00e9trica para evitar rebabas<\/figcaption><\/figure>\n\n\n\n<p>\u2779 Equilibrio de la fuerza de moldeo, es decir, que el centro de presi\u00f3n de inyecci\u00f3n coincida con el centro del canal principal, para evitar el centelleo.<\/p>\n\n\n\n<p>2.2 Mantenga el canal lo m\u00e1s corto posible para reducir la tasa de desperdicio, el ciclo de moldeo y la p\u00e9rdida de calor. La disposici\u00f3n en H es mejor que la anular o sim\u00e9trica.<\/p>\n\n\n\n<p>2.3 Para los productos de alta precisi\u00f3n, el n\u00famero de cavidades debe ser el menor posible. A\u00f1adir una cavidad reduce la precisi\u00f3n del producto en 4%. El n\u00famero de cavidades para moldes de precisi\u00f3n no suele ser superior a 4.<\/p>\n\n\n\n<p>2.4 Mismo color, mismo material.<\/p>\n\n\n\n<p>2.5 Estructura compacta, ahorro de materiales de acero<\/p>\n\n\n\n<p>2.6 Grande cerca, peque\u00f1o lejos<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"466\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Big-near-small-far-layout.webp\" alt=\"Trazado grande cerca, peque\u00f1o lejos\" class=\"wp-image-19384\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Big-near-small-far-layout.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Big-near-small-far-layout-300x140.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Big-near-small-far-layout-768x358.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Big-near-small-far-layout-18x8.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p>2,7 Altura similar<\/p>\n\n\n\n<p>2,8 Grande cerca, peque\u00f1o lejos, encajar en los huecos<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"525\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Large-near-small-far-fitting-in-gaps.webp\" alt=\"Grande cerca, peque\u00f1o lejos, encajar en los huecos\" class=\"wp-image-19385\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Large-near-small-far-fitting-in-gaps.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Large-near-small-far-fitting-in-gaps-300x158.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Large-near-small-far-fitting-in-gaps-768x403.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Large-near-small-far-fitting-in-gaps-18x9.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p>2,9 Para el mismo producto, grande cerca, peque\u00f1o lejos<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"413\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/For-the-same-product-big-near-small-far.webp\" alt=\"Para el mismo producto, grande cerca, peque\u00f1o lejos\" class=\"wp-image-19386\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/For-the-same-product-big-near-small-far.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/For-the-same-product-big-near-small-far-300x124.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/For-the-same-product-big-near-small-far-768x317.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/For-the-same-product-big-near-small-far-18x7.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">Para el mismo producto, grande cerca, peque\u00f1o lejos<\/figcaption><\/figure>\n\n\n\n<p>2.10 Buena procesabilidad<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-injection-process-factors\">3. Factores del proceso de inyecci\u00f3n<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-analysis-1\">An\u00e1lisis:<\/h4>\n\n\n\n<p>\u2460 Presi\u00f3n de inyecci\u00f3n demasiado alta o velocidad de inyecci\u00f3n demasiado r\u00e1pida. Debido a la alta presi\u00f3n y a la alta velocidad, aumenta la fuerza de apertura del molde, lo que provoca el desbordamiento.<\/p>\n\n\n\n<p>\u2461 La sobrealimentaci\u00f3n provoca destellos. <\/p>\n\n\n\n<p>\u2462 La temperatura del ca\u00f1\u00f3n, de la boquilla es demasiado alta o <a href=\"https:\/\/firstmold.com\/es\/guides\/mold-temperature\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>temperatura del molde<\/strong><\/a> es demasiado alto, lo que puede reducir la viscosidad del pl\u00e1stico, aumentar la fluidez y provocar destellos al fluir suavemente en el molde.<\/p>\n\n\n\n<p>\u2463 El tiempo de espera es demasiado largo.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-solution-1\">Soluci\u00f3n: <\/h4>\n\n\n\n<p>\u2776 Reduzca la presi\u00f3n y la velocidad de inyecci\u00f3n. <\/p>\n\n\n\n<p>\u2777 Reducir la cantidad de material, pesar el peso por adelantado o disminuir gradualmente durante <a href=\"https:\/\/firstmold.com\/es\/guides\/what-is-mold-trial\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>prueba de moho<\/strong><\/a>.<\/p>\n\n\n\n<p>\u2778 Reduzca la temperatura del barril, la boquilla y el molde. <\/p>\n\n\n\n<p>\u2779 Reduzca el tiempo de retenci\u00f3n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-injection-machine-factors\">4. Factores de la m\u00e1quina de inyecci\u00f3n<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-analysis-2\">An\u00e1lisis:<\/h4>\n\n\n\n<p>\u2460 La fuerza de sujeci\u00f3n de la m\u00e1quina es insuficiente.<\/p>\n\n\n\n<p>\u2461 El ajuste del dispositivo de sujeci\u00f3n es deficiente, el mecanismo de palanca no est\u00e1 enderezado, lo que provoca una sujeci\u00f3n no uniforme a izquierda, derecha, o arriba, abajo, el paralelismo del molde es deficiente, lo que provoca que un lado est\u00e9 bien sujeto y el otro no, lo que provoca destellos durante la inyecci\u00f3n.<\/p>\n\n\n\n<p>\u2462 El anillo de retenci\u00f3n muy desgastado, el muelle de la boquilla de muelle fallado, el ca\u00f1\u00f3n o el tornillo desgastados en exceso, fallo del sistema de refrigeraci\u00f3n en el puerto de alimentaci\u00f3n, causando \"puenteo\", alimentaci\u00f3n insuficiente de material. Adem\u00e1s, una almohadilla de amortiguaci\u00f3n de tama\u00f1o insuficiente tambi\u00e9n puede contribuir a este problema.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-solution-2\">Soluci\u00f3n: <\/h4>\n\n\n\n<p>\u2776 Sustit\u00fayala por una inyectora de mayor tonelaje. <\/p>\n\n\n\n<p>\u2777 Compruebe la sujeci\u00f3n, rep\u00e1rela o sustit\u00fayala a tiempo si es necesario. <\/p>\n\n\n\n<p>\u2778 Sustituya las piezas de inyecci\u00f3n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Un caso t\u00edpico de flash<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-case-analysis-router-housing-flash\">An\u00e1lisis de casos - Router Housing Flash<\/h3>\n\n\n\n<p>La imagen siguiente muestra una carcasa fabricada por una empresa con material de PC. Como se observa, el destello es peque\u00f1o y est\u00e1 dentro de l\u00edmites aceptables. Sin embargo, el cliente, por determinadas razones, solicit\u00f3 cambiar a material PBT. Tras el cambio de material, aparecieron destellos, y fue dif\u00edcil resolver el problema a trav\u00e9s del proceso. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-reason-analysis-and-improvement-measures\">An\u00e1lisis de motivos y medidas de mejora<\/h3>\n\n\n\n<p>El destello en este caso se debe principalmente al destello del producto resultante de la sustituci\u00f3n del material bajo el control del proceso de moldeo original.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-mold-related-causes\">Causas relacionadas con el moho:<\/h4>\n\n\n\n<p>La estructura del producto en este caso es simple, utilizando un \u00fanico punto de inyecci\u00f3n de compuerta lateral. El material anterior utilizado fue PC, y los ajustes del proceso de moldeo y la apertura del molde se ajustaron a los requisitos del material PC. El valor de desbordamiento (anchura de la abertura) para el material PC es de 0,06 mm, mientras que el del material PBT es menor, de 0,02 mm. Comparando los datos, es evidente que si el molde se dise\u00f1a para 0,06 mm, el PBT producir\u00e1 rebabas en zonas donde antes no lo hac\u00eda el PC.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-measures-to-solve-the-above-problem\">Medidas para resolver el problema anterior:<\/h4>\n\n\n\n<p>Durante la apertura del molde, respete el valor de desbordamiento correcto; de lo contrario, ser\u00e1 necesario modificar el molde.<\/p>\n\n\n\n<p><strong>Tome nota:<\/strong> En este caso, aunque los materiales PBT y PC difieren en fluidez y temperatura de inyecci\u00f3n, la diferencia en el valor de desbordamiento es un hecho. Por lo tanto, cuando sustituya los materiales y dise\u00f1e los moldes, tenga muy en cuenta estos impactos, ya que los ajustes del proceso pueden ser todo un reto.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-in-conclusion\">En conclusi\u00f3n<\/h2>\n\n\n\n<p>La rebaba es uno de los defectos m\u00e1s comunes del moldeo por inyecci\u00f3n. Una f\u00e1brica de moldeo por inyecci\u00f3n que puede evitar o resolver perfectamente los problemas de flash es una empresa con una buena calidad de proceso. Adem\u00e1s, muchas piezas de pl\u00e1stico pueden encontrar m\u00faltiples problemas simult\u00e1neamente. Por lo tanto, la familiaridad con el dise\u00f1o estructural, el dise\u00f1o de moldes, las pruebas de muestras, el an\u00e1lisis y la resoluci\u00f3n de problemas, as\u00ed como garantizar la apariencia y las caracter\u00edsticas de los materiales, son habilidades esenciales para todo profesional de la industria del moldeo por inyecci\u00f3n.<\/p>\n\n\n\n<p>Si tiene alguna pregunta sobre flash, no dude en ponerse en contacto con nosotros en <a>firstmold88@gmail.com<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Comprenda el defecto de flash en el moldeo por inyecci\u00f3n, empiece por el dise\u00f1o del producto y controle cada paso del dise\u00f1o del molde y de la producci\u00f3n del moldeo.<\/p>","protected":false},"author":5,"featured_media":31388,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[48],"tags":[51,63],"class_list":["post-19377","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tips","tag-injection-molding","tag-injection-molding-defects"],"acf":[],"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>Flash In Injection Molding<\/title>\n<meta name=\"description\" content=\"Understand the flash defect in injection molding, start from product design, and control each step of mold design and molding production.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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