{"id":9521,"date":"2021-07-10T06:28:14","date_gmt":"2021-07-10T06:28:14","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9521"},"modified":"2021-07-09T06:32:49","modified_gmt":"2021-07-09T06:32:49","slug":"vacuum-formed-headbox","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/vacuum-formed-headbox\/","title":{"rendered":"Chambre de remplissage moul\u00e9e sous vide"},"content":{"rendered":"<p>Les param\u00e8tres de coul\u00e9e et la temp\u00e9rature de la caisse de t\u00eate moul\u00e9e sous vide constituent les facteurs cl\u00e9s pour garantir la production de bobines d'aluminium par coul\u00e9e et laminage.<\/p>\n<p>En abaissant la temp\u00e9rature de la caisse de t\u00eate moul\u00e9e sous vide (\u00e9galement appel\u00e9e \u00ab caisse avant \u00bb ou \u00ab r\u00e9partiteur \u00bb), il est possible de r\u00e9duire les d\u00e9fauts li\u00e9s \u00e0 la grosse granulom\u00e9trie caus\u00e9s par une temp\u00e9rature excessive, de limiter la r\u00e9action d'oxydation et de formation de scories de la masse fondue \u00e0 haute temp\u00e9rature, et ainsi de garantir la qualit\u00e9 de la t\u00f4le lamin\u00e9e \u00e0 chaud.<\/p>\n<p>En raison de l'augmentation de la vitesse de coul\u00e9e, les particules de la deuxi\u00e8me phase, observables dans la structure \u00e0 fort grossissement de la bobine coul\u00e9e-lamin\u00e9e, sont plus petites, dispers\u00e9es et r\u00e9parties de mani\u00e8re plus homog\u00e8ne. Ces fines particules de compos\u00e9s m\u00e9talliques interm\u00e9diaires permettent d'am\u00e9liorer les propri\u00e9t\u00e9s m\u00e9caniques du mat\u00e9riau et d'augmenter sa r\u00e9sistance sans r\u00e9duire sa plasticit\u00e9.<\/p>\n<p>Gr\u00e2ce \u00e0 l'augmentation de la vitesse de coul\u00e9e-laminage, les conditions de solidification de la masse fondue sont am\u00e9lior\u00e9es, la densit\u00e9 de la structure interne de la bobine coul\u00e9e-lamin\u00e9e est accrue et la qualit\u00e9 de la structure interne est consid\u00e9rablement am\u00e9lior\u00e9e. Cependant, l'augmentation de la vitesse de coul\u00e9e-laminage est \u00e9galement limit\u00e9e \u00e0 une certaine plage. \u00c0 mesure que la hauteur verticale de l'intervalle de cristallisation de l'alliage augmente, la vitesse de coul\u00e9e-laminage doit \u00eatre r\u00e9duite en cons\u00e9quence.<\/p>\n<p>Afin de faire face aux probl\u00e8mes de refroidissement et \u00e0 l'augmentation de la vitesse lors de la coul\u00e9e et du laminage, compte tenu de l'augmentation de la <a href=\"http:\/\/www.alalloycasting.com\/fr\/casting-nozzle-roll-gap\/\">\u00e9cart entre la buse et le rouleau<\/a>, il convient d'am\u00e9liorer la m\u00e9thode de r\u00e9partition du d\u00e9bit au niveau des buses et d'optimiser l'uniformit\u00e9 de la temp\u00e9rature et de la pression du fluide dans la cavit\u00e9 des buses en am\u00e9liorant la r\u00e9partition des blocs d'obturation dans les embouts de la machine de coul\u00e9e. Afin de s'adapter au refroidissement et \u00e0 l'acc\u00e9l\u00e9ration des processus de coul\u00e9e et de laminage, il est n\u00e9cessaire d'augmenter l'intensit\u00e9 du refroidissement pour garantir l'\u00e9quilibre thermique au cours de la production.<\/p>\n<p>La r\u00e9duction de la temp\u00e9rature de la caisse de t\u00eate et l'augmentation de la vitesse de coul\u00e9e permettent non seulement d'accro\u00eetre le rendement de production, mais aussi d'am\u00e9liorer la fluidit\u00e9 de la masse fondue et les conditions de solidification de celle-ci, ainsi que d'augmenter la densit\u00e9 de la structure interne de la bobine lamin\u00e9e \u00e0 chaud.<\/p>","protected":false},"excerpt":{"rendered":"<p>The casting tips and temperature of vacuum formed headbox are the key factors to ensure the aluminum coil casting and rolling production. After lowering the&hellip;<\/p>","protected":false},"author":1,"featured_media":9522,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9521","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Vacuum Formed Headbox -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The casting tips and temperature of vacuum formed headbox are the key factors to ensure aluminum coil casting and rolling production.\" \/>\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\/vacuum-formed-headbox\/\" \/>\n<meta property=\"og:locale\" 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