{"id":4596,"date":"2020-09-09T03:30:59","date_gmt":"2020-09-09T03:30:59","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4596"},"modified":"2020-09-09T03:30:59","modified_gmt":"2020-09-09T03:30:59","slug":"hot-top-casting","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/hot-top-casting\/","title":{"rendered":"Moulage \u00e0 chaud"},"content":{"rendered":"

Dans la production par fusion et moulage d'alliages d'aluminium d\u00e9form\u00e9s, le moulage \u00e0 t\u00eate chaude est un proc\u00e9d\u00e9 de moulage largement utilis\u00e9, qui pr\u00e9sente les caract\u00e9ristiques suivantes :<\/p>\n

(1) Le temps de s\u00e9jour du m\u00e9tal dans le moule apr\u00e8s solidification et formage est court, ce qui permet d'\u00e9viter pratiquement tout ph\u00e9nom\u00e8ne de r\u00e9chauffage secondaire ; la surface du lingot est donc plane et lisse, et sa qualit\u00e9 est bonne.<\/p>\n

(2) Avant que le lingot ne soit refroidi directement par l'eau de refroidissement au niveau du bord inf\u00e9rieur du moule, la paroi liquide de la cavit\u00e9 qui se forme est tr\u00e8s mince. On obtient ainsi une vitesse de cristallisation \u00e9lev\u00e9e, ce qui permet d'obtenir des dendrites fines.<\/p>\n

(3) \u00c9quip\u00e9 d'un chapeau chauffant situ\u00e9 au-dessus du cristallisoir, qui augmente la distance entre le niveau du liquide et le front de cristallisation, et \u00e9l\u00e8ve la temp\u00e9rature de la masse fondue. Le gaz pr\u00e9cipit\u00e9 lors de la cristallisation du lingot et les scories qu\u2019il transporte remontent sous certaines conditions \u00e0 la surface du liquide, ce qui contribue \u00e0 am\u00e9liorer la puret\u00e9 du lingot.<\/p>\n

(4) \u00c9tant donn\u00e9 que le bonnet chauffant<\/a> Cela permet d'augmenter le niveau de liquide, ce qui permet de r\u00e9aliser la coul\u00e9e au m\u00eame niveau, r\u00e9duisant ainsi la pollution secondaire de la masse fondue dans le syst\u00e8me de coul\u00e9e.<\/p>\n

(5) Les cristalliseurs peuvent \u00eatre dispos\u00e9s de mani\u00e8re compacte lors de la coul\u00e9e, et les moules destin\u00e9s \u00e0 une coul\u00e9e en une seule fois sont reli\u00e9s \u00e0 la plaque de d\u00e9rivation, ce qui am\u00e9liore l'efficacit\u00e9 de la production.<\/p>\n

\"Moulage<\/p>\n

Les \u00e9quipements utilis\u00e9s pour le proc\u00e9d\u00e9 de moulage \u00e0 chaud pr\u00e9sentent les avantages suivants :<\/p>\n

(1) Il est possible de couler plusieurs lingots \u00e0 la fois. Le nombre de lingots pouvant \u00eatre coul\u00e9s par cycle est d\u00e9termin\u00e9 par la surface du puits de coul\u00e9e et le diam\u00e8tre du lingot. Une usine de transformation de l\u2019aluminium peut couler simultan\u00e9ment des lingots de petite taille, ce qui est bien plus productif que les moules classiques et la coul\u00e9e horizontale.<\/p>\n

(2) Op\u00e9ration de coul\u00e9e simple. Au d\u00e9but de la coul\u00e9e, ouvrez l'orifice de coul\u00e9e. Lorsque le niveau d'aluminium fondu dans la goulotte atteint 90%, relevez le barrage de retenue<\/a> dans le tuyau de distribution<\/a> simultan\u00e9ment, et diriger rapidement l'aluminium en fusion vers les tuyaux de guidage. Coul\u00e9e. Une fois la coul\u00e9e lanc\u00e9e, r\u00e9gler la pression et le d\u00e9bit d'eau, et augmenter \u00e0 temps le niveau de liquide dans la goulotte. De cette mani\u00e8re, des dizaines de lingots peuvent \u00eatre coul\u00e9s \u00e0 la fois, et seuls des mouleurs qualifi\u00e9s sont n\u00e9cessaires pendant l\u2019ensemble du processus de coul\u00e9e : 3 \u00e0 4 personnes.<\/p>\n

(3) D\u00e9pannage facile. Au cours du processus de coul\u00e9e, si un lingot pr\u00e9sente une fissure, une fuite, etc., il suffit de boucher le tube de tirage avec c\u00f4ne de sortie<\/a>.<\/p>\n

(4) La qualit\u00e9 de surface du lingot est bonne. L'exp\u00e9rience montre que lorsque les pr\u00e9paratifs pr\u00e9alables \u00e0 la coul\u00e9e sont effectu\u00e9s, notamment lorsque le moule est mis en place et que le dispositif de finition est lubrifi\u00e9, on obtient une meilleure qualit\u00e9 de surface du lingot.<\/p>","protected":false},"excerpt":{"rendered":"

In the melting and casting production of deformed aluminum alloys, hot top casting is a widely used casting process, which has the following characteristics: (1)…<\/p>","protected":false},"author":1,"featured_media":4598,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[10],"class_list":["post-4596","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-hot-top-casting"],"yoast_head":"\nHot Top Casting used for Deformed Aluminum Alloys<\/title>\n<meta name=\"description\" content=\"In the melting and casting production of deformed aluminum alloys, hot top casting is a widely used, it can improve the production efficiency.\" \/>\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\/fr\/hot-top-casting\/\" 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