{"id":7245,"date":"2020-12-25T09:18:41","date_gmt":"2020-12-25T09:18:41","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7245"},"modified":"2020-12-25T09:18:41","modified_gmt":"2020-12-25T09:18:41","slug":"molten-aluminium-casting-stage","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/molten-aluminium-casting-stage\/","title":{"rendered":"Etapa de fundi\u00e7\u00e3o de alum\u00ednio fundido"},"content":{"rendered":"

Ap\u00f3s o alum\u00ednio fundido permanecer no molde por um determinado per\u00edodo, inicia-se a fase de fundi\u00e7\u00e3o. Nessa fase, a velocidade de fundi\u00e7\u00e3o come\u00e7a a aumentar, passando da velocidade inicial para a velocidade normal de fundi\u00e7\u00e3o; a temperatura de fundi\u00e7\u00e3o tamb\u00e9m come\u00e7a a subir at\u00e9 atingir a temperatura normal de fundi\u00e7\u00e3o; e o volume de \u00e1gua de resfriamento aumenta, passando do volume inicial para o volume normal de \u00e1gua de resfriamento.<\/p>\n

Preste aten\u00e7\u00e3o aos seguintes itens durante a etapa de fundi\u00e7\u00e3o do alum\u00ednio fundido:<\/strong><\/p>\n

Essa etapa \u00e9 a que apresenta maior risco de falhas na fundi\u00e7\u00e3o, al\u00e9m de ser propensa a explos\u00f5es e queimaduras. De acordo com estat\u00edsticas relevantes, mais de 70% de acidentes na fundi\u00e7\u00e3o ocorreram nessa etapa. Portanto, deve-se dar aten\u00e7\u00e3o especial \u00e0 seguran\u00e7a nessa etapa, e o n\u00famero de funcion\u00e1rios no local deve ser reduzido ao m\u00ednimo.<\/p>\n

A velocidade inicial de fundi\u00e7\u00e3o \u00e9, geralmente, de 50% a 70% da velocidade normal de fundi\u00e7\u00e3o. Normalmente, a velocidade normal de fundi\u00e7\u00e3o deve ser atingida ao longo de um comprimento de fundi\u00e7\u00e3o de 200 mm.<\/p>\n

O volume de \u00e1gua de resfriamento geralmente come\u00e7a a aumentar em rela\u00e7\u00e3o ao volume inicial de \u00e1gua quando o tempo de reten\u00e7\u00e3o se inicia. Quando a velocidade de fundi\u00e7\u00e3o atinge o n\u00edvel normal, o volume de \u00e1gua (press\u00e3o da \u00e1gua) tamb\u00e9m atinge o volume normal de \u00e1gua de resfriamento da fundi\u00e7\u00e3o.<\/p>\n

Preste aten\u00e7\u00e3o \u00e0 observa\u00e7\u00e3o nesta etapa, e o molde com vazamento de alum\u00ednio deve ser vedado com cone de fibra refrat\u00e1ria<\/a> a tempo de evitar um vazamento excessivo de alum\u00ednio, evitando assim explos\u00f5es ou outros acidentes.<\/p>\n

\"Cones<\/p>\n

Nesta etapa de fundi\u00e7\u00e3o do alum\u00ednio fundido, tamb\u00e9m \u00e9 f\u00e1cil ocorrer o entupimento causado pela condensa\u00e7\u00e3o do alum\u00ednio no tubo de vaz\u00e3o. Existem muitas raz\u00f5es para o entupimento, geralmente decorrentes da baixa temperatura do alum\u00ednio fundido ou do tempo excessivamente longo de enchimento e reten\u00e7\u00e3o. \u00c9 necess\u00e1ria uma an\u00e1lise espec\u00edfica na produ\u00e7\u00e3o real. O alum\u00ednio do entupimento pode se refundir e vazar durante o processo de fundi\u00e7\u00e3o, causando uma explos\u00e3o. O alum\u00ednio do entupimento tamb\u00e9m pode fazer com que a vaz\u00e3o do alum\u00ednio fundido seja muito baixa em determinada posi\u00e7\u00e3o da plataforma, o que dificulta o preenchimento com o alum\u00ednio fundido e, por fim, dificulta a fundi\u00e7\u00e3o.<\/p>\n

Geralmente, quando o recipiente com vazamento ou o tamp\u00e3o de alum\u00ednio atinge mais de 5 cristalizadores, a fundi\u00e7\u00e3o deve ser interrompida a tempo para evitar riscos.<\/p>\n

Nesta fase, o n\u00edvel do l\u00edquido na plataforma de fundi\u00e7\u00e3o sofrer\u00e1 grandes varia\u00e7\u00f5es. Procure evitar grandes ondula\u00e7\u00f5es no alum\u00ednio fundido. Preste aten\u00e7\u00e3o \u00e0 velocidade de inclina\u00e7\u00e3o do forno est\u00e1tico ou ao ajuste do olho do forno manual. Fa\u00e7a com que o n\u00edvel do l\u00edquido na plataforma atinja um valor est\u00e1vel em pouco tempo. O valor geral de estabilidade deve ser 30 mm a 40 mm inferior \u00e0 superf\u00edcie mais alta da plataforma.<\/p>","protected":false},"excerpt":{"rendered":"

After the molten aluminium filling for a certain period of time, it starts to enter the casting stage. At this stage, the casting speed starts…<\/p>","protected":false},"author":1,"featured_media":7251,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-7245","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nMolten Aluminium Casting Blocked with Refractory Fiber Cone<\/title>\n<meta name=\"description\" content=\"At this molten aluminium casting stage, the mold with aluminum leakage should be blocked with refractory fiber cone in time.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/pt\/molten-aluminium-casting-stage\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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