{"id":6927,"date":"2020-12-10T02:50:03","date_gmt":"2020-12-10T02:50:03","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6927"},"modified":"2020-12-10T02:50:03","modified_gmt":"2020-12-10T02:50:03","slug":"molten-cast-metal-filtration","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/molten-cast-metal-filtration\/","title":{"rendered":"Filtration des m\u00e9taux en fusion"},"content":{"rendered":"<p>La filtration du m\u00e9tal en fusion s'est av\u00e9r\u00e9e \u00eatre une m\u00e9thode efficace pour am\u00e9liorer la qualit\u00e9 globale de la pi\u00e8ce moul\u00e9e. La filtration am\u00e9liore les propri\u00e9t\u00e9s m\u00e9caniques et physiques de la pi\u00e8ce moul\u00e9e en \u00e9liminant les inclusions du m\u00e9tal en fusion avant qu'il ne p\u00e9n\u00e8tre dans la cavit\u00e9 du moule.<\/p>\n<p>Il existe de nombreuses applications dans la pratique de la fonderie o\u00f9 une grande quantit\u00e9 de m\u00e9tal en fusion est vers\u00e9e \u00e0 plusieurs reprises dans le four de maintien afin de reconstituer le m\u00e9tal utilis\u00e9, puis vers\u00e9e dans la machine de moulage sous pression \u00e0 chaque coul\u00e9e et lors des op\u00e9rations de nettoyage. Les fonderies qui doivent verser de mani\u00e8re r\u00e9p\u00e9t\u00e9e ou automatique du m\u00e9tal en fusion (en particulier de l\u2019aluminium) dans des machines de moulage, telles que les machines de moulage sous pression ou les installations de moulage en moule permanent, ne peuvent pas facilement utiliser de filtres dans leurs syst\u00e8mes d\u2019alimentation. Il est donc courant de filtrer le m\u00e9tal dans le puits d\u2019immersion du four de maintien avant de le verser dans la machine. Ces op\u00e9rations font g\u00e9n\u00e9ralement appel \u00e0 un robot qui plonge dans l\u2019orifice de pr\u00e9l\u00e8vement du four, puis verse le m\u00e9tal dans une machine de moulage. L\u2019aluminium est g\u00e9n\u00e9ralement le m\u00e9tal coul\u00e9 dans ces op\u00e9rations. M\u00eame si l\u2019aluminium est filtr\u00e9 dans le four de maintien, lorsqu\u2019il est immerg\u00e9 \u00e0 l\u2019air libre dans l\u2019orifice d\u2019immersion, il forme imm\u00e9diatement des \u00e9cumes ou de l\u2019oxyde. Pouvoir filtrer le m\u00e9tal au moment o\u00f9 il est coul\u00e9 dans la machine de moulage constituerait un avantage consid\u00e9rable. La plupart de ces op\u00e9rations sont \u00e9galement r\u00e9alis\u00e9es \u00e0 grand volume.<\/p>\n<p><a href=\"http:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filters-applications\/\">Filtres en mousse c\u00e9ramique<\/a> sont largement utilis\u00e9s dans la filtration des m\u00e9taux en fusion destin\u00e9s \u00e0 la coul\u00e9e afin d\u2019am\u00e9liorer la propret\u00e9 des pi\u00e8ces moul\u00e9es et de r\u00e9duire le nombre de pi\u00e8ces devant \u00eatre mises au rebut en raison de la pr\u00e9sence d\u2019impuret\u00e9s ind\u00e9sirables. Ce filtre en c\u00e9ramique est g\u00e9n\u00e9ralement int\u00e9gr\u00e9 au syst\u00e8me de coul\u00e9e afin d\u2019\u00e9liminer les scories, les r\u00e9sidus et autres particules du flux de m\u00e9tal avant que celui-ci ne p\u00e9n\u00e8tre dans la cavit\u00e9 du moule. Les types de filtres c\u00e9ramiques les plus courants comprennent les structures c\u00e9ramiques poreuses rigides et les mousses c\u00e9ramiques r\u00e9ticul\u00e9es rigides. Ces filtres sont relativement \u00e9pais et, en raison de leur structure volumineuse, le m\u00e9tal en fusion qui, souvent, se refroidit avant d\u2019atteindre le filtre n\u00e9cessite des ouvertures plus larges pour garantir un passage fiable du m\u00e9tal en fusion. Le filtre en c\u00e9ramique extrud\u00e9e en nid d\u2019abeilles repose donc sur la formation d\u2019un g\u00e2teau de filtration en amont du filtre pour \u00e9liminer les inclusions plus petites qui, sans cela, passeraient \u00e0 travers les ouvertures du filtre. Le filtre en mousse c\u00e9ramique, bien qu\u2019il offre un parcours plus sinueux que le filtre en nid d\u2019abeilles, pr\u00e9sente \u00e9galement le risque de formation de g\u00e2teaux de filtration susceptibles de devenir des inclusions.<\/p>","protected":false},"excerpt":{"rendered":"<p>The filtration of molten cast metal has proven to be an effective method to improve overall casting quality. Filtration improves the mechanical and physical properties&hellip;<\/p>","protected":false},"author":1,"featured_media":6928,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6927","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>Molten Cast Metal Filtration with Ceramic Foam Filters<\/title>\n<meta name=\"description\" content=\"Ceramic foam filters are widely used in molten cast metal filtration to improve the cleanliness of the aluminum castings.\" \/>\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-cast-metal-filtration\/\" 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