{"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\/fr\/molten-aluminium-casting-stage\/","title":{"rendered":"\u00c9tape de coul\u00e9e de l'aluminium en fusion"},"content":{"rendered":"

Une fois que l'aluminium fondu a \u00e9t\u00e9 coul\u00e9 pendant un certain temps, la phase de coul\u00e9e commence. \u00c0 ce stade, la vitesse de coul\u00e9e augmente progressivement, passant de la vitesse initiale \u00e0 la vitesse normale de coul\u00e9e ; la temp\u00e9rature de coul\u00e9e augmente \u00e9galement pour atteindre la temp\u00e9rature normale de coul\u00e9e ; enfin, le d\u00e9bit d'eau de refroidissement passe du d\u00e9bit initial au d\u00e9bit normal de coul\u00e9e.<\/p>\n

Veillez \u00e0 respecter les points suivants pendant la phase de coul\u00e9e de l'aluminium fondu :<\/strong><\/p>\n

Cette \u00e9tape est celle qui pr\u00e9sente le plus de risques d'\u00e9chec dans le processus de moulage ; elle comporte \u00e9galement des risques d'explosion et de br\u00fblures. Selon les statistiques disponibles, plus de 70% d'accidents li\u00e9s au moulage se sont produits \u00e0 cette \u00e9tape. Il convient donc d'accorder une attention particuli\u00e8re \u00e0 la s\u00e9curit\u00e9 \u00e0 ce stade et de r\u00e9duire au minimum le nombre de personnes pr\u00e9sentes sur le site.<\/p>\n

La vitesse de coul\u00e9e initiale est g\u00e9n\u00e9ralement comprise entre 50% et 70% de la vitesse de coul\u00e9e normale. En r\u00e8gle g\u00e9n\u00e9rale, la vitesse de coul\u00e9e normale doit \u00eatre atteinte dans les 200 mm de longueur de coul\u00e9e.<\/p>\n

Le volume d'eau de refroidissement commence g\u00e9n\u00e9ralement \u00e0 augmenter par rapport au volume initial d\u00e8s le d\u00e9but du temps de maintien. Lorsque la vitesse de coul\u00e9e atteint son niveau normal, le volume d'eau (pression d'eau) atteint \u00e9galement le volume normal d'eau de refroidissement de la coul\u00e9e.<\/p>\n

\u00c0 ce stade, veillez \u00e0 bien observer le moule, et le moule pr\u00e9sentant une fuite d'aluminium doit \u00eatre colmat\u00e9 avec c\u00f4ne en fibres r\u00e9fractaires<\/a> \u00e0 temps pour \u00e9viter une fuite excessive d'aluminium, et ainsi pr\u00e9venir toute explosion ou tout autre accident.<\/p>\n

\"C\u00f4nes<\/p>\n

\u00c0 ce stade de la coul\u00e9e d\u2019aluminium fondu, il est \u00e9galement facile de provoquer un bouchage d\u00fb \u00e0 la condensation de l\u2019aluminium dans le tube de tirage. Les causes du bouchage sont nombreuses, mais elles sont g\u00e9n\u00e9ralement li\u00e9es \u00e0 la basse temp\u00e9rature de l\u2019aluminium fondu ou \u00e0 des temps de remplissage et de maintien trop longs. Une analyse sp\u00e9cifique est n\u00e9cessaire en conditions r\u00e9elles de production. L'aluminium du bouchon peut se refondre et s'\u00e9chapper pendant le processus de coul\u00e9e, provoquant une explosion. Il peut \u00e9galement entra\u00eener un d\u00e9bit d'aluminium fondu trop faible \u00e0 un certain niveau de la plate-forme, ce qui rend difficile le remplissage par l'aluminium fondu et, au final, la coul\u00e9e elle-m\u00eame.<\/p>\n

En r\u00e8gle g\u00e9n\u00e9rale, lorsque le creuset qui fuit ou le bouchon en aluminium atteint plus de 5 cristallisateurs, il convient d'interrompre la coul\u00e9e \u00e0 temps afin d'\u00e9viter tout danger.<\/p>\n

\u00c0 ce stade, le niveau de liquide de la plate-forme de coul\u00e9e varie consid\u00e9rablement. \u00c9vitez autant que possible les gros rouleaux d'aluminium fondu. Surveillez la vitesse d'inclinaison du four statique ou le r\u00e9glage de l'\u0153illet du four manuel. Faites en sorte que le niveau de liquide de la plate-forme atteigne une valeur stable en peu de temps. La valeur de stabilit\u00e9 g\u00e9n\u00e9rale doit \u00eatre inf\u00e9rieure de 30 \u00e0 40 mm \u00e0 la surface la plus haute de la plate-forme.<\/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\/fr\/molten-aluminium-casting-stage\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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