{"id":9239,"date":"2021-06-19T08:25:52","date_gmt":"2021-06-19T08:25:52","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9239"},"modified":"2021-06-18T08:30:38","modified_gmt":"2021-06-18T08:30:38","slug":"filters-for-cast-alloys","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/filters-for-cast-alloys\/","title":{"rendered":"Filtres pour alliages moul\u00e9s"},"content":{"rendered":"<p>Les filtres en mousse c\u00e9ramique destin\u00e9s aux alliages de fonderie constituent la m\u00e9thode la plus efficace pour la filtration du m\u00e9tal en fusion.<\/p>\n<p>L'industrie mondiale impose sans cesse de nouvelles exigences en mati\u00e8re de qualit\u00e9 des produits de haute technologie, tels que les flans de bo\u00eetes et les substrats en aluminium pour plaques PS. La transformation et la production de l'aluminium n\u00e9cessitent l'utilisation de filtres en mousse c\u00e9ramique, qui \u00e9liminent les inclusions non m\u00e9talliques de l'aluminium fondu et de ses alliages. Les exigences de base applicables aux filtres destin\u00e9s aux alliages de fonderie sont les suivantes :<\/p>\n<ul>\n<li>Le filtre permet d'\u00e9liminer efficacement les inclusions m\u00e9talliques.<\/li>\n<li>Le filtre doit garantir une vitesse normale de coul\u00e9e du m\u00e9tal.<\/li>\n<li>La surface du filtre doit \u00eatre irr\u00e9guli\u00e8re, pr\u00e9senter une certaine stabilit\u00e9 chimique et une bonne r\u00e9sistance aux chocs thermiques.<\/li>\n<li>Au contact de l'aluminium fondu, il ne l'endommagera pas, n'\u00e9clatera pas et ne le polluera pas.<\/li>\n<li>Co\u00fbt r\u00e9duit.<\/li>\n<\/ul>\n<p>Ces conditions ne sont ni ind\u00e9pendantes les unes des autres, ni totalement compatibles. Par exemple, si la vitesse d'\u00e9coulement de l'aluminium fondu est augment\u00e9e, l'efficacit\u00e9 de la filtration s'en trouvera affect\u00e9e. Les filtres destin\u00e9s aux alliages de fonderie peuvent r\u00e9duire la r\u00e9sistance \u00e0 l'\u00e9coulement du m\u00e9tal fondu en augmentant la taille des pores et le nombre d'ouvertures, ou en r\u00e9duisant l'\u00e9paisseur de la maille du filtre. Par cons\u00e9quent, la conception du filtre doit tenir compte de sa structure, de sa r\u00e9sistance \u00e0 l'\u00e9coulement, ainsi que de l'effet de filtration optimal et de la qualit\u00e9 de la coul\u00e9e.<\/p>\n<p>La mousse c\u00e9ramique est un nouveau type de mat\u00e9riau qui peut \u00eatre fabriqu\u00e9 dans diff\u00e9rentes tailles et formes afin de r\u00e9pondre aux exigences en mati\u00e8re de caract\u00e9ristiques et d'efficacit\u00e9 de filtration.<\/p>\n<p>Le <a href=\"http:\/\/www.alalloycasting.com\/fr\/foam-ceramic-filter-medium\/\">filtre en mousse c\u00e9ramique (CFF)<\/a> Il se compose d'un morceau de mousse c\u00e9ramique \u00e0 cellules ouvertes pr\u00e9sentant diff\u00e9rentes \u00e9paisseurs et sections transversales. En r\u00e8gle g\u00e9n\u00e9rale, il comporte un volume de vides interconnect\u00e9s de 85%. La finesse de fabrication du filtre varie, g\u00e9n\u00e9ralement entre 10, 20 et 30 PPI (pores par pouce lin\u00e9aire), et l\u2019on observe une tendance vers des pores plus fins (50, 60, 80 PPI). \u00c0 mesure que la taille des pores diminue, l\u2019efficacit\u00e9 et la fiabilit\u00e9 du syst\u00e8me de filtration augmentent. Une autre observation int\u00e9ressante concernant la filtration de m\u00e9taux tr\u00e8s purs est que le filtre pr\u00e9sente des performances m\u00e9diocres pour les particules de petite taille (15 \u00e0 30 \u00b5m) par rapport aux particules comprises entre 30 et 60 \u00b5m.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ceramic foam filters for cast alloys are the most effective way for molten metal filtration. The industry in the world continuously puts forward new requirements&hellip;<\/p>","protected":false},"author":1,"featured_media":9240,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9239","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>Filters for Cast Alloys, Ceramic Foam Filter Molten Metal Filtration<\/title>\n<meta name=\"description\" content=\"Ceramic foam filters for cast alloys are the most effective way for molten metal filtration, used for high-tech products such as can blanks.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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