{"id":8582,"date":"2021-04-28T03:42:24","date_gmt":"2021-04-28T03:42:24","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8582"},"modified":"2021-04-28T03:42:24","modified_gmt":"2021-04-28T03:42:24","slug":"molten-metal-flow-controllers","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/molten-metal-flow-controllers\/","title":{"rendered":"R\u00e9gulateurs de d\u00e9bit de m\u00e9tal en fusion"},"content":{"rendered":"

Les r\u00e9gulateurs de d\u00e9bit de m\u00e9tal en fusion peuvent \u00eatre utilis\u00e9s en association avec une buse et une pointe, cette derni\u00e8re pr\u00e9sentant des flancs sensiblement droits, de pr\u00e9f\u00e9rence divergents. De plus, les r\u00e9gulateurs de d\u00e9bit de m\u00e9tal en fusion peuvent \u00eatre utilis\u00e9s en association avec des parois lat\u00e9rales, les parois sup\u00e9rieure et inf\u00e9rieure \u00e9tant sensiblement droites, mais divergentes en aval des r\u00e9gulateurs de d\u00e9bit. Le fait d\u2019assurer une vitesse et un profil thermique uniformes \u00e0 l\u2019aide des r\u00e9gulateurs de d\u00e9bit de m\u00e9tal en fusion pr\u00e9sente l\u2019avantage de produire des brames, en particulier des brames d\u2019aluminium, sensiblement exemptes de stries ou de d\u00e9fauts de surface.<\/p>\n

Le mat\u00e9riau utilis\u00e9 pour la fabrication de embout de buse<\/a> est un mat\u00e9riau adapt\u00e9 au contact avec le m\u00e9tal en fusion, et qui r\u00e9siste \u00e0 la dissolution ou \u00e0 l'\u00e9rosion par ce m\u00e9tal.<\/p>\n

Le niveau de m\u00e9tal en fusion dans le r\u00e9servoir est maintenu gr\u00e2ce \u00e0 un syst\u00e8me de r\u00e9gulation du niveau de m\u00e9tal, par lequel le m\u00e9tal en fusion s'\u00e9coule via bec verseur<\/a> provenant de la source de m\u00e9tal en fusion. Le syst\u00e8me de r\u00e9gulation du niveau de m\u00e9tal contr\u00f4le le d\u00e9bit de m\u00e9tal entrant dans le r\u00e9servoir \u00e0 l'aide d'un flotteur qui permet de d\u00e9terminer et de r\u00e9guler le niveau de m\u00e9tal en fusion dans le r\u00e9servoir.<\/p>\n

\"Dalle<\/p>\n

L'\u00e9l\u00e9ment d'extr\u00e9mit\u00e9 sert \u00e0 acheminer un flux de m\u00e9tal en fusion depuis le r\u00e9servoir vers la ligne de contact d'une paire de rouleaux. Ce flux de ruban de m\u00e9tal en fusion doit pr\u00e9senter une vitesse et une r\u00e9partition de temp\u00e9rature uniformes sur toute la largeur de l\u2019\u00e9l\u00e9ment d\u2019embout, laquelle peut varier, dans la pratique, de 36 pouces \u00e0 60 pouces, voire plus. Le maintien d\u2019un tel \u00e9coulement de m\u00e9tal et de telles caract\u00e9ristiques de temp\u00e9rature uniformes pour des largeurs de 60 pouces ou plus s\u2019est av\u00e9r\u00e9 impossible dans l\u2019\u00e9tat de la technique.<\/p>\n

L'\u00e9l\u00e9ment d'extr\u00e9mit\u00e9 comprend une paroi sup\u00e9rieure et une paroi inf\u00e9rieure soutenues par des \u00e9l\u00e9ments de serrage d'extr\u00e9mit\u00e9. La paroi sup\u00e9rieure et la paroi inf\u00e9rieure sont reli\u00e9es entre elles par des \u00e9l\u00e9ments de mont\u00e9e lat\u00e9raux afin de d\u00e9finir un passage. En rendant les \u00e9l\u00e9ments de mont\u00e9e lat\u00e9raux convergents, on \u00e9limine la s\u00e9paration du flux et le reflux \u00e0 proximit\u00e9 de ces \u00e9l\u00e9ments. Le canal convergent ainsi form\u00e9 fournit un gradient de pression favorable le long des parois et un \u00e9coulement principal acc\u00e9l\u00e9r\u00e9 qui limite l'augmentation de l'\u00e9paisseur de la couche limite du m\u00e9tal s'\u00e9coulant en aval. Cela permet de r\u00e9duire au minimum l'une des causes de la non-uniformit\u00e9 de la vitesse d'\u00e9coulement du m\u00e9tal observ\u00e9e dans l'\u00e9tat de la technique.<\/p>","protected":false},"excerpt":{"rendered":"

Molten metal flow controllers may be used in conjunction with nozzle and tip, and wherein the tip has sides which are substantially straight sides, which…<\/p>","protected":false},"author":1,"featured_media":8592,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8582","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nMolten Metal Flow Controllers -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Molten metal flow controllers may be used in conjunction with nozzle and tip, which can provide uniform speed and heat distribution.\" \/>\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-metal-flow-controllers\/\" \/>\n<meta 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