{"id":11688,"date":"2021-12-09T02:09:33","date_gmt":"2021-12-09T02:09:33","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11688"},"modified":"2021-12-09T02:09:33","modified_gmt":"2021-12-09T02:09:33","slug":"cast-rolling-nozzles","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/cast-rolling-nozzles\/","title":{"rendered":"Boquillas de laminaci\u00f3n por fundici\u00f3n"},"content":{"rendered":"

Las boquillas de laminaci\u00f3n fundidas se calcinan a altas temperaturas y no contienen materia org\u00e1nica. La tasa de contracci\u00f3n a 800 \u00b0C es nula, por lo que pueden utilizarse en diversas m\u00e1quinas de colada continua de doble rodillo. Las boquillas de colada blanda de fibra cer\u00e1mica sin escoria se utilizan para producir chapas y l\u00e1minas de aluminio destinadas a materiales de envasado farmac\u00e9utico y alimentario. La boquilla de colada dura, fabricada con fibra cer\u00e1mica y material de relleno importado, se caracteriza por su alta resistencia, su superficie lisa y su resistencia al desgaste. Es adecuada para la colada y el laminado de chapas de aluminio a alta velocidad.<\/p>\n

El boquilla de fundici\u00f3n<\/a>\u00a0Est\u00e1 fabricado con materiales de alta calidad (sin silicato de sodio), que presentan un aluminio con buenas propiedades antiadherentes, baja conductividad t\u00e9rmica, buena estabilidad a altas temperaturas, densidad uniforme, superficie lisa y dimensiones precisas.<\/p>\n

Las protuberancias en forma de tira que aparecen a lo largo de la superficie del producto de aluminio son defectos superficiales del mismo. Cuando la protuberancia se encuentra en un solo lado del producto, se denomina \u00aboreja unilateral\u00bb, y cuando se encuentra en ambos lados, \u00aboreja bilateral\u00bb. Algunas se extienden a lo largo de todo el producto, pero tambi\u00e9n hay que son parciales, intermitentes o peri\u00f3dicas. Las protuberancias que aparecen en la superficie del producto deben eliminarse mediante desbaste.<\/p>\n

\"\"<\/p>\n

Las boquillas de laminado fundidas agrietaban las orejas porque, durante el proceso de laminado, se produc\u00eda un exceso de metal en el orificio acabado y dicho exceso se comprim\u00eda en el espacio entre los rodillos. Las razones concretas son las siguientes:<\/p>\n

(1) Un dise\u00f1o inadecuado de la pasada, un ajuste incorrecto del laminador o un desgaste severo del orificio acabado, lo que da lugar a un gran n\u00famero de orificios acabados y rebabas en ambos lados;
\n(2) El carril gu\u00eda de entrada del orificio acabado est\u00e1 mal instalado, no est\u00e1 bien fijado, el juego es demasiado grande o el tipo de orificio de entrada no es propicio para que se produzcan rebabas unilaterales o rebabas rotas en ambos lados;
\n(3) La temperatura de la pieza laminada es baja o la diferencia de temperatura a lo largo de toda su longitud es considerable;
\n(4) Ajuste deficiente del laminador continuo.
\n(5) Al cortar el metal en el orificio delantero del producto acabado, aparecen cascos convexos en la superficie de la pieza laminada y se generan rebabas peri\u00f3dicas durante el laminado.<\/p>\n

Los m\u00e9todos de prevenci\u00f3n y eliminaci\u00f3n son:<\/p>\n

(1) Elegir un factor de anchura adecuado y perfeccionar el dise\u00f1o del orificio;
\n(2) Mejorar el proceso de ajuste del laminador y distribuir de forma razonable el grado de reducci\u00f3n;
\n(3) Instala correctamente el riel de entrada del orificio ya terminado;
\n(4) Sustituir las ranuras de desgaste que presenten un desgaste grave;
\n(5) Mejorar la calidad del calentamiento de la palanquilla para alcanzar una temperatura uniforme.<\/p>","protected":false},"excerpt":{"rendered":"

Cast rolling nozzles are calcined at high temperatures and do not contain organic matter. The shrinkage rate at 800\u00b0C is zero, and it can be…<\/p>","protected":false},"author":1,"featured_media":11690,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-11688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nCast Rolling Nozzles for Molten Aluminum -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Cast-rolling nozzles are calcined at high temperatures and do not contain organic matter. 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