{"id":4960,"date":"2023-05-31T00:52:53","date_gmt":"2023-05-30T22:52:53","guid":{"rendered":"https:\/\/www.zatecsa.com\/?p=4960"},"modified":"2023-05-31T01:16:09","modified_gmt":"2023-05-30T23:16:09","slug":"defectos-en-inyeccion-de-plastico_rechupes","status":"publish","type":"post","link":"https:\/\/www.zatecsa.com\/en\/defectos-en-inyeccion-de-plastico_rechupes\/","title":{"rendered":"Defectos en inyecci\u00f3n de pl\u00e1stico:Rechupes"},"content":{"rendered":"<h1>Defectos de Inyecci\u00f3n de pl\u00e1stico: Rechupes<\/h1>\n<p>Los rechupes o defectos de inyecci\u00f3n por marcas de hundimiento, <em><strong>son depresiones que se forman en la superficie de la cara opuesta de una zona de acumulaci\u00f3n de masa, al contraer la pieza de pl\u00e1stico durante el enfriamiento<\/strong><\/em>. Es decir la capa externa se desplaza hacia adentro por las tensiones de enfriamiento.<\/p>\n<p>Esto afecta negativamente a algunas <a href=\"https:\/\/www.zatecsa.com\/tolerancias-en-piezas-de-inyeccion-de-plastico\/\"><em><strong>tolerancias<\/strong><\/em><\/a> lineales, as\u00ed como tolerancias geom\u00e9tricas, planitud, paralelismo&#8230; en la zona donde se produce el rechupe.<\/p>\n<p>Es uno de los defectos t\u00edpicos de inyecci\u00f3n, y <em><strong>en ocasiones viene determinado por el propio <a href=\"https:\/\/www.zatecsa.com\/consideraciones-de-diseno-en-inyeccon-de-plastico\/\">dise\u00f1o<\/a> de pieza<\/strong><\/em>, en un cruce de nervios, o por tabiques secundarios de refuerzo con un espesor semejante o superior al de la pared donde apoya.<\/p>\n<p>No obstante, <em><strong>puede haber otras causas como:<\/strong><\/em><\/p>\n<ul>\n<li><em><strong>Solidificaci\u00f3n lenta<\/strong><\/em> durante el proceso.<\/li>\n<li><strong><em>Tiempo de demasiado corto de la presi\u00f3n de mantenimiento.<\/em><\/strong><\/li>\n<li><em><strong>Ramal y entrada de inyecci\u00f3n insuficiente<\/strong><\/em>, por su dimensionado.<\/li>\n<\/ul>\n<p>Por tanto, para evitar que el bebedero y ramal a pieza solidifiquen prematuramente, es necesario dimensionar correctamente los canales con una secci\u00f3n adecuada, y lo mas ampl\u00eda posible seg\u00fan geometr\u00eda de cada pieza.<\/p>\n<p>Adem\u00e1s el aumentar la presi\u00f3n de mantenimiento, ayuda en la disminuci\u00f3n del citado rechupe.<\/p>\n<figure style=\"width: 403px\" class=\"wp-caption alignleft\"><img fetchpriority=\"high\" decoding=\"async\" title=\"SinkMarks\" src=\"https:\/\/www.zatecsa.com\/wp-content\/uploads\/2023\/05\/Sink-Marks.jpg\" alt=\"\" width=\"403\" height=\"303\" \/><figcaption class=\"wp-caption-text\">Rechupes (Sink Marks)_Zatec technical plastic injection<\/figcaption><\/figure>\n<p>Otros puntos a tener en cuenta que pueden ayudar para minimizar estas marcas de hundimiento, son la homogeneizaci\u00f3n del espesor general con un cambio de dimensi\u00f3n gradual si fuera necesario. Adem\u00e1s de dimensionar los nervios o paredes secundarias adecuadamente, aplicando vaciados donde sea posible. Por otro lado, si la entrada de inyecci\u00f3n se ubica en la zona de mayor espesor, o cerca de \u00e9sta, recibiendo material fundido durante el mayor tiempo posible, compensando la contracci\u00f3n, evitaremos o minimizaremos este defecto.<\/p>\n<p>Tambi\u00e9n conviene revisar, no solo el dise\u00f1o de pieza y par\u00e1metros de m\u00e1quina, otros aspectos como el material en alg\u00fan cambio de lote, secado adecuado, molde, perif\u00e9ricos o combinaci\u00f3n de varios factores, tambi\u00e9n deben tenerse en cuenta a la hora de caracterizar un defecto en nuestro 8D para la resoluci\u00f3n de problemas.<\/p>\n<p>Cualquier duda o consulta donde necesite optimizar el dise\u00f1o y ahorrar costes, estamos a su disposici\u00f3n. <a href=\"https:\/\/www.zatecsa.com\/contacto-inyeccion-plasticos-tecnicos\/\"><em><strong>Contacta con nosotros<\/strong><\/em><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Defectos de Inyecci\u00f3n de pl\u00e1stico: Rechupes Los rechupes o defectos de inyecci\u00f3n por marcas de hundimiento, son depresiones que se forman en la superficie de la cara opuesta de una zona de acumulaci\u00f3n de masa, al contraer la pieza de pl\u00e1stico durante el enfriamiento. Es decir la capa externa se desplaza hacia adentro por las [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4976,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[25],"tags":[147,92,71,72],"class_list":["post-4960","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticias","tag-defectos-proceso-inyeccion","tag-diseno-de-piezas-de-plastico","tag-empresa-de-inyeccion-de-plasticos","tag-moldeo-por-inyeccion"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Defectos en inyecci\u00f3n de pl\u00e1stico:Rechupes<\/title>\n<meta name=\"description\" content=\"Los rechupes, son depresiones en la superficie de 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