{"id":8943,"date":"2021-05-27T06:41:43","date_gmt":"2021-05-27T06:41:43","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8943"},"modified":"2021-05-27T06:41:43","modified_gmt":"2021-05-27T06:41:43","slug":"ceramic-foam-filters-for-cast","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filters-for-cast\/","title":{"rendered":"Filtres en mousse c\u00e9ramique pour la fonderie"},"content":{"rendered":"<p>Les filtres en mousse c\u00e9ramique destin\u00e9s aux alliages d\u2019aluminium moul\u00e9s permettent de r\u00e9duire consid\u00e9rablement les impuret\u00e9s. Ils permettent non seulement d\u2019am\u00e9liorer l\u2019aspect des pi\u00e8ces moul\u00e9es apr\u00e8s d\u00e9moulage, mais aussi de limiter l\u2019apparition de produits d\u00e9fectueux, voire de r\u00e9duire les travaux de maintenance. L'utilisation d'un filtre pour m\u00e9tal en fusion permet d'\u00e9liminer diverses impuret\u00e9s pr\u00e9sentes dans la masse fondue et de la purifier. Ce type de moulage peut \u00eatre r\u00e9alis\u00e9 avec divers alliages, ce qui permet d'am\u00e9liorer les propri\u00e9t\u00e9s m\u00e9caniques et la r\u00e9sistance \u00e0 la fatigue, de r\u00e9duire les co\u00fbts d'usinage, de raccourcir les d\u00e9lais d'usinage, d'am\u00e9liorer l'usinabilit\u00e9 et de prolonger la dur\u00e9e de vie des outils d'usinage.<\/p>\n<p>En g\u00e9n\u00e9ral, il existe trois m\u00e9thodes pour \u00e9liminer les inclusions de l'aluminium fondu : la pr\u00e9cipitation, la flottation et la filtration. Lorsque la taille des inclusions est inf\u00e9rieure \u00e0 90 \u03bcm, elles ont moins de chances de se d\u00e9poser au fond du four sous l'effet de la gravit\u00e9. La purification traditionnelle au gaz, l'affinage en continu et d'autres proc\u00e9d\u00e9s peuvent faire remonter certaines inclusions \u00e0 la surface de l'aluminium fondu, mais lorsque la taille des inclusions est inf\u00e9rieure \u00e0 30 \u03bcm, les chances qu'elles remontent \u00e0 la surface sont tr\u00e8s faibles.<\/p>\n<p>L'avantage du filtre en mousse c\u00e9ramique r\u00e9side dans sa capacit\u00e9 \u00e0 retenir des inclusions bien plus petites que la taille de ses pores. Le principe de r\u00e9tention des inclusions par les filtres de fonderie repose sur trois m\u00e9canismes : le filtrage par tamisage, le filtrage par formation d'un g\u00e2teau filtrant et le filtrage en profondeur.<\/p>\n<p>Les filtres en mousse c\u00e9ramique destin\u00e9s aux fonderies d'aluminium moul\u00e9 sont capables de filtrer les scories et les impuret\u00e9s pr\u00e9sentes dans la solution m\u00e9tallique bien plus efficacement que les autres filtres, et leur filtration exerce un effet physique et chimique global. Les grosses inclusions sont physiquement tamis\u00e9es et retenues \u00e0 la surface du filtre. En raison de leur affinit\u00e9 chimique, les petites inclusions sont adsorb\u00e9es \u00e0 la surface, sur les parois lat\u00e9rales ou dans les alv\u00e9oles du filtre. Ainsi, celui-ci permet d\u2019\u00e9liminer efficacement les impuret\u00e9s de diff\u00e9rentes tailles, y compris celles qui sont bien plus petites que les alv\u00e9oles du filtre. Le <a href=\"http:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filter-for-aluminum\/\">filtre en mousse c\u00e9ramique pour l'aluminium<\/a> peut \u00e9galement lisser l'\u00e9coulement turbulent du m\u00e9tal en fusion, r\u00e9duire la turbulence et permettre au m\u00e9tal en fusion de s'\u00e9couler de mani\u00e8re fluide et r\u00e9guli\u00e8re.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ceramic Foam Filters for cast aluminum alloy can greatly reduce impurities. It not only can reduce the appearance of castings after demolished, but also can&hellip;<\/p>","protected":false},"author":1,"featured_media":8950,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-8943","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ceramic-foam-filter"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ceramic Foam Filters for Cast Aluminum -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The Ceramic Foam Filters for cast aluminum foundry is capable of filtering metal solution slag far better than other filters.\" \/>\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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