{"id":17256,"date":"2024-03-19T18:16:17","date_gmt":"2024-03-19T10:16:17","guid":{"rendered":"https:\/\/firstmold.com\/?post_type=case-study&#038;p=17256"},"modified":"2026-03-30T11:29:23","modified_gmt":"2026-03-30T03:29:23","slug":"fuse-bracket-manufacturing","status":"publish","type":"case-study","link":"https:\/\/firstmold.com\/es\/case-study\/fuse-bracket-manufacturing\/","title":{"rendered":"Fabricaci\u00f3n de soportes de fusibles mediante moldeo por inserci\u00f3n"},"content":{"rendered":"<p>Un soporte de fusibles, tambi\u00e9n llamado portafusibles o bloque de fusibles, es un alojamiento seguro para un fusible dentro de un circuito el\u00e9ctrico. La principal consideraci\u00f3n para la fabricaci\u00f3n de soportes de fusibles es sujetar firmemente el fusible en su lugar. Esto proporciona el aislamiento el\u00e9ctrico necesario para proteger tanto al personal como a los equipos de fallos el\u00e9ctricos como cortocircuitos, sobrecalentamiento o sobrecorriente.<\/p>\n\n\n\n<p>Existen diferentes tipos de soportes para fusibles, como los montados en panel, los montados en placa de circuito impreso (PCB), los soportes para fusibles con plomo, los soportes para fusibles de carril y los soportes para fusibles de automoci\u00f3n. El tipo de soporte suele venir determinado por la aplicaci\u00f3n prevista. Entre las principales funciones de un soporte para fusibles de pl\u00e1stico se incluyen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>Proporciona un montaje y una conexi\u00f3n seguros:<\/em><\/strong> Proporciona una base estable que mantiene el fusible firmemente unido a la v\u00eda el\u00e9ctrica y evita que se suelte por factores externos o vibraciones.<\/li>\n\n\n\n<li><strong><em>Sirve como aislante el\u00e9ctrico para mayor seguridad:<\/em><\/strong> La fabricaci\u00f3n de piezas de fusibles (producci\u00f3n en serie) suele realizarse con pl\u00e1stico no conductor y resistente al calor que a\u00edsla los componentes el\u00e9ctricos bajo tensi\u00f3n para evitar cortocircuitos y descargas el\u00e9ctricas accidentales.<\/li>\n\n\n\n<li><strong><em>Facilita el mantenimiento y la sustituci\u00f3n:<\/em><\/strong> Los t\u00e9cnicos pueden acceder f\u00e1cilmente a un fusible fundido a trav\u00e9s del soporte para sustituirlo. Esto minimiza el tiempo de inactividad por reparaci\u00f3n del circuito.<\/li>\n\n\n\n<li><strong><em>Protecci\u00f3n frente a elementos ambientales:<\/em><\/strong> La fabricaci\u00f3n de soportes de fusibles est\u00e1 dise\u00f1ada principalmente para sellar el fusible de la humedad, el polvo y la corrosi\u00f3n. Esto permite utilizarlos en condiciones duras.<\/li>\n\n\n\n<li><strong><em>Mejor organizaci\u00f3n para fusibles m\u00faltiples:<\/em><\/strong> En aplicaciones como la industria del autom\u00f3vil, donde se necesitan varios fusibles, un soporte de fusibles ayuda a centralizar los diferentes fusibles para una mejor gesti\u00f3n de m\u00faltiples circuitos.<\/li>\n<\/ul>\n\n\n\n<p>Hay muchas aplicaciones que requieren la fabricaci\u00f3n de soportes de fusibles, como la automoci\u00f3n, la maquinaria industrial, los electrodom\u00e9sticos y los sistemas de energ\u00edas renovables. Proporcionan soluciones rentables y duraderas para cortocircuitos y otros fallos el\u00e9ctricos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-client-requirements\">Requisitos del cliente<\/h2>\n\n\n\n<p>Despu\u00e9s de visitar las instalaciones de producci\u00f3n y la tecnolog\u00eda de First Mold, un fabricante de soportes de fusibles se convenci\u00f3 de que hab\u00eda encontrado al socio adecuado y se sent\u00f3 a discutir los detalles de su proyecto. El cliente quer\u00eda un utillaje de producci\u00f3n en serie para la fabricaci\u00f3n de piezas de fusibles. Se espera que el utillaje de acero se utilice para moldear tereftalato de polibutileno (PBT) en soportes de fusibles.<\/p>\n\n\n\n<p>El cliente quer\u00eda espec\u00edficamente el moldeo por inserci\u00f3n para el proceso de fabricaci\u00f3n. En esta t\u00e9cnica de moldeo, los componentes met\u00e1licos, como terminales de acero inoxidable, insertos roscados o barras colectoras, se colocan en una cavidad del molde antes de la inyecci\u00f3n del PBT fundido. Tras la inyecci\u00f3n, el pl\u00e1stico encapsula los insertos para crear una \u00fanica pieza doble que combina metal conductor con una carcasa de pl\u00e1stico aislante.<\/p>\n\n\n\n<p>Otros requisitos cr\u00edticos mencionados por el fabricante de soportes para fusibles son un \u00edndice de rendimiento de producci\u00f3n en serie \u226590%, un tratamiento superficial brillante est\u00e1ndar y una tolerancia de las piezas de \u00b10,05 mm. Cumplir la precisi\u00f3n dimensional era fundamental para un montaje sin juntas, un reto constante que ten\u00edan con su anterior socio.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-challenges-and-solution\">Retos y soluciones<\/h2>\n\n\n\n<p>El director de producci\u00f3n de First Mold, Bowen Huang, reuni\u00f3 a un equipo de profesionales del utillaje para hacer una lluvia de ideas sobre los posibles retos del proyecto e idear soluciones adecuadas para cada uno de ellos. Hab\u00eda retos peculiares asociados a la petici\u00f3n del cliente. Por ejemplo, la creaci\u00f3n de un molde de soporte fusible para moldeo por inserci\u00f3n requiere m\u00e1s atenci\u00f3n que los moldes normales.<\/p>\n\n\n\n<p>Adem\u00e1s, aunque el PBT es un termopl\u00e1stico de ingenier\u00eda de alto rendimiento con gran resistencia, rigidez y resistencia al calor, se sabe que tiene una gran capacidad de absorci\u00f3n de agua. Esto puede dar lugar a la fabricaci\u00f3n de productos defectuosos si no se optimiza adecuadamente el proceso de producci\u00f3n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-insert-displacement-during-fuse-parts-manufacturing-mass-production\">Desplazamiento de insertos durante la fabricaci\u00f3n de piezas fusibles (producci\u00f3n en serie)<\/h3>\n\n\n\n<p>Uno de los mayores retos de la fabricaci\u00f3n de soportes de fusibles mediante moldeo por inserci\u00f3n es la desviaci\u00f3n o el desplazamiento de la inserci\u00f3n por el pl\u00e1stico fundido inyectado. El m\u00e1s m\u00ednimo desplazamiento puede provocar atascos en el montaje o fallos funcionales. Cuando no hay forma de corregir el desplazamiento, se desecha todo el lote.<\/p>\n\n\n\n<p>A diferencia de otros fabricantes de moldes de piezas fusibles, el equipo de ingenieros de First Mold resolvi\u00f3 el problema del desplazamiento de la plaquita en la fase de dise\u00f1o del molde. El innovador dise\u00f1o, facilitado con software de vanguardia, condujo a un desplazamiento cero de la posici\u00f3n del inserto en la producci\u00f3n en masa de piezas fusibles, eliminando el desecho en origen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-challenge-with-molding-pbt-material\">Reto del moldeo de material PBT<\/h3>\n\n\n\n<p>Aunque el PBT presenta varias ventajas deseables con respecto a los pl\u00e1sticos normales, se enfrenta a diferentes contratiempos en el moldeo, como la r\u00e1pida cristalizaci\u00f3n, que puede provocar alabeos y contracciones elevadas y no uniformes, especialmente cuando est\u00e1 reforzado con fibra de vidrio.<\/p>\n\n\n\n<p>El material PBT presenta una elevada absorci\u00f3n de agua y una contracci\u00f3n dif\u00edcil de controlar. Adem\u00e1s, la humedad puede romper la cadena molecular del PBT a altas temperaturas. Esto lo vuelve quebradizo, reduce su resistencia y crea defectos superficiales como manchas o separaciones. El alabeo del producto, las dimensiones fuera de tolerancia y la falta de ajuste al equipo del cliente son algunos de los problemas que pueden derivarse de una humedad excesiva en el PBT.<\/p>\n\n\n\n<p>El equipo de ingenieros de First Mold utiliz\u00f3 una biblioteca de par\u00e1metros de moldeo por inyecci\u00f3n especializada para PBT. Esto incluye el secado a 110<sup>o<\/sup>C a 130<sup>o<\/sup>C durante 3 - 4 horas para reducir el contenido de humedad por debajo de 0,02%. La temperatura del molde para la fabricaci\u00f3n de los estribos fusibles se control\u00f3 adecuadamente en torno a 70<sup>o<\/sup>C a 90<sup>o<\/sup>C para controlar la cristalizaci\u00f3n.<\/p>\n\n\n\n<p>Tanto el dise\u00f1o del molde como el del producto se tuvieron muy en cuenta para evitar secciones gruesas que pudieran provocar marcas de hundimiento. Una combinaci\u00f3n de pasos de optimizaci\u00f3n ayud\u00f3 a First Mold a eliminar por completo la contracci\u00f3n, la deformaci\u00f3n y las burbujas, con unas dimensiones estables 100%.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-tooling-challenge-for-single-cavity-mold-for-insert-molding\">Reto de utillaje para molde de cavidad \u00fanica para moldeo por inserci\u00f3n<\/h3>\n\n\n\n<p>Muchos fabricantes de moldes no tienen experiencia en la creaci\u00f3n de moldes de una sola cavidad para el moldeo por inserci\u00f3n. Aunque el fabricante de soportes de fusibles sugiri\u00f3 inicialmente un molde multicavidad, el equipo de ingenieros de First Mold lo desaconsej\u00f3 por la mayor probabilidad de defectos.<\/p>\n\n\n\n<p>Sin embargo, la falta de experiencia en la depuraci\u00f3n de moldes de cavidad \u00fanica para la fabricaci\u00f3n de soportes de fusibles puede provocar frecuentes paradas de producci\u00f3n, ajustes de moldes y cambios de material durante la producci\u00f3n en serie, lo que provoca retrasos en la entrega y costes incontrolados.<\/p>\n\n\n\n<p>First Mold utiliz\u00f3 moldes de cavidad \u00fanica para obtener la m\u00e1xima precisi\u00f3n en lugar de moldes multicavidad. El equipo se centr\u00f3 exclusivamente en componentes de seguridad de control electr\u00f3nico de gama alta, con una precisi\u00f3n muy superior a la de los moldes multicavidad utilizados por la competencia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-insufficient-bonding-strength-between-the-plastic-and-metal-insert\">Insuficiente fuerza de adhesi\u00f3n entre el inserto de pl\u00e1stico y el de metal<\/h3>\n\n\n\n<p>Unos par\u00e1metros de moldeo incorrectos, la contaminaci\u00f3n de la superficie y la falta de enclavamiento mec\u00e1nico son algunos de los factores que pueden provocar una uni\u00f3n insuficiente entre el pl\u00e1stico y el metal en el moldeo por inserci\u00f3n. Cuando los insertos se aflojan, giran o se caen, se crean riesgos para la seguridad. Esto puede dar lugar a devoluciones directas de los clientes.<\/p>\n\n\n\n<p>El equipo de ingenieros de First Mold cre\u00f3 un proceso maduro de producci\u00f3n en serie para la fabricaci\u00f3n de piezas fusibles mediante moldeo por inserci\u00f3n que garantizaba 72 horas de producci\u00f3n estable continua, con un \u00edndice de rendimiento de 93,2%+, muy superior a la media del sector. Esta haza\u00f1a se logr\u00f3 utilizando una combinaci\u00f3n de procesos, incluyendo:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Limpieza o desengrase adecuados del inserto mediante un ba\u00f1o qu\u00edmico.<\/li>\n\n\n\n<li>Precalentar el inserto a 80<sup>o<\/sup>C a 120<sup>o<\/sup>C para reducir el choque t\u00e9rmico.<\/li>\n\n\n\n<li>Chorreado con arena de la superficie de la plaquita para hacerla m\u00e1s rugosa y aumentar el enclavamiento.<\/li>\n\n\n\n<li>Optimizaci\u00f3n de los par\u00e1metros de inyecci\u00f3n, incluida la velocidad de inyecci\u00f3n, la presi\u00f3n de mantenimiento y el control de la contracci\u00f3n.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-poor-dimensional-consistency\">Poca coherencia dimensional<\/h3>\n\n\n\n<p>Otra preocupaci\u00f3n del fabricante de soportes para fusibles era garantizar que el producto tuviera la precisi\u00f3n dimensional adecuada. Una precisi\u00f3n dimensional deficiente crear\u00eda una situaci\u00f3n en la que las piezas no podr\u00edan cumplir los requisitos de las l\u00edneas de montaje automatizadas y solo ser\u00edan adecuadas para el montaje manual de gama baja.<\/p>\n\n\n\n<p>First Mold implement\u00f3 un control dimensional de todo el proceso para lograr un \u00cdndice de Compatibilidad de Procesos (CPK) \u2265 1,325. El producto resultante era perfectamente compatible con l\u00edneas de montaje automatizadas para clientes de gama alta.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-the-client-gained-with-first-mold-s-solutions\">Lo que el cliente gan\u00f3 con las soluciones de First Mold<\/h2>\n\n\n\n<p>No nos limitamos a enviar al cliente un molde de una sola cavidad. First Mold entreg\u00f3 una herramienta completa con documentaci\u00f3n para la optimizaci\u00f3n del proceso que garantiza una producci\u00f3n de soportes de fusibles de alta calidad constante. Aprovechando las capacidades de hardware y software de nuestras instalaciones, as\u00ed como un equipo de ingenieros con conocimientos avanzados en utillaje de moldes, First Mold entreg\u00f3 al cliente el molde de producci\u00f3n en serie para la fabricaci\u00f3n de piezas fusibles en menos de tres semanas.<\/p>\n\n\n\n<p>De acuerdo con la petici\u00f3n del cliente de un acabado superficial brillante est\u00e1ndar, empezamos con un esmerilado inicial utilizando piedras de aceite m\u00e1s gruesas antes de pasar a pulir la superficie del molde con papel de lija de grano m\u00e1s fino. Conseguir el acabado superficial brillante est\u00e1ndar era importante para el fabricante de piezas fusibles porque le ahorraba costes de posproducci\u00f3n. En otras palabras, los soportes de los fusibles estaban listos para su env\u00edo tras el montaje.<\/p>\n\n\n\n<p>Al trabajar con nuestro equipo de expertos fabricantes de moldes, el cliente recibi\u00f3 asesoramiento gratuito para redise\u00f1ar el molde de cavidad \u00fanica para el moldeo por inserci\u00f3n con el fin de evitar el desplazamiento durante la inyecci\u00f3n del pl\u00e1stico fundido. Resolver este problema, el m\u00e1s denunciado en el moldeo por inserci\u00f3n, garantiza al cliente un mejor \u00edndice de rendimiento y consistencia, mucho m\u00e1s de lo que propon\u00edan sus contactos anteriores.<\/p>\n\n\n\n<p>Al igual que todos los dem\u00e1s clientes con los que ha trabajado First Mold, el fabricante de soportes de fusibles disfrut\u00f3 de asistencia posventa y sustituci\u00f3n r\u00e1pida de piezas, lo que puede ahorrar m\u00e1s costes a largo plazo gracias a la reducci\u00f3n de los tiempos de inactividad operativa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faq\">PREGUNTAS FRECUENTES<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1774840714600\"><strong class=\"schema-faq-question\">\u00bfCu\u00e1l es el mayor reto de la fabricaci\u00f3n de soportes de fusibles mediante moldeo por inserci\u00f3n?<\/strong> <p class=\"schema-faq-answer\">La desalineaci\u00f3n y el desplazamiento del inserto bajo la inyecci\u00f3n a alta presi\u00f3n de pl\u00e1stico fundido, el alabeo o las grietas por tensi\u00f3n debidas a la diferencia de coeficientes de expansi\u00f3n t\u00e9rmica entre el pl\u00e1stico y los metales, y la mala uni\u00f3n entre el inserto y el pl\u00e1stico son los principales retos que debe superar el fabricante de moldes.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1774840729097\"><strong class=\"schema-faq-question\">C\u00f3mo evitar una mala uni\u00f3n en el moldeo por inserci\u00f3n para la fabricaci\u00f3n de piezas fusibles<\/strong> <p class=\"schema-faq-answer\"><strong><em>Selecci\u00f3n de pol\u00edmero pl\u00e1stico y material met\u00e1lico compatibles:<\/em><\/strong> Aseg\u00farese de que tienen coeficientes de dilataci\u00f3n t\u00e9rmica similares y utilice materiales con excelentes propiedades adhesivas.<br><strong><em>Preparaci\u00f3n adecuada del inserto:<\/em><\/strong> Limpie y desengrase los insertos con alcohol o limpiadores ultras\u00f3nicos y desbaste la superficie del inserto para crear una estructura microporosa que mejore el enclavamiento mec\u00e1nico.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>This study shows the molding manufacturer&#8217;s capabilities to manufacture perfect fuse bracket parts with precision insert injection molding.<\/p>","protected":false},"author":2,"featured_media":17258,"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":[78],"class_list":["post-17256","case-study","type-case-study","status-publish","has-post-thumbnail","hentry","case-study-category-injection-molding-cases","case-study-tag-tools-and-equipment"],"acf":{"photo_gallery":{"case_study_gallery":[[{"id":17258,"title":"DC Circuit Fuse Holder by insert molding service","caption":"DC Circuit Fuse Holder by insert molding 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