filtre en mousse c\u00e9ramique d'alumine<\/a> Il faut disposer d'une certaine hauteur manom\u00e9trique pour d\u00e9marrer la filtration et surmonter l'obstacle que repr\u00e9sente la tension superficielle. La valeur de cette hauteur manom\u00e9trique a une incidence consid\u00e9rable sur le d\u00e9marrage du filtre. En r\u00e8gle g\u00e9n\u00e9rale, elle doit \u00eatre sup\u00e9rieure \u00e0 400 mm. Le p\u00e9n\u00e9trateur doit donc \u00eatre proportionnellement plus grand.<\/p>\nLa partie o\u00f9 le filtre en c\u00e9ramique expans\u00e9e et le moule se chevauchent doit \u00eatre scell\u00e9e autant que possible afin d\u2019\u00e9viter toute fuite de m\u00e9tal en fusion par l\u2019interstice, ce qui compromettrait l\u2019efficacit\u00e9 de la filtration. Pour certains moules en sable, tels que les moules humides, l'utilisation du filtre en c\u00e9ramique expans\u00e9e seul peut facilement entra\u00eener la chute du sable \u00e0 l'endroit o\u00f9 le filtre est plac\u00e9. Il est donc n\u00e9cessaire de concevoir un support de filtre destin\u00e9 \u00e0 maintenir ce dernier en place, afin qu'il ne bouge pas sous l'impact du m\u00e9tal en fusion, d'emp\u00eacher les particules de sable de p\u00e9n\u00e9trer dans la cavit\u00e9 et d'\u00e9viter toute perte de m\u00e9tal en fusion.<\/p>\n
Principes de filtration de l'aluminium fondu \u00e0 l'aide d'un filtre en mousse c\u00e9ramique<\/strong><\/p>\nPlus la position de placement est proche de la cavit\u00e9 de moulage, mieux c'est, car cela r\u00e9duit le risque d'oxydation secondaire ;<\/p>\n
La conception du syst\u00e8me de coul\u00e9e doit \u00eatre simple, et les autres mesures de r\u00e9tention des scories peuvent \u00eatre n\u00e9glig\u00e9es, ce qui permet d'am\u00e9liorer le taux d'utilisation du moule en sable et le rendement du processus ;<\/p>\n
La surface de travail du filtre doit \u00eatre comprise entre 4 et 6 fois la section transversale de blocage du syst\u00e8me de coul\u00e9e afin de garantir que la vitesse de coul\u00e9e ne soit pas affect\u00e9e ;<\/p>\n
S\u00e9lectionnez le filtre adapt\u00e9 en fonction du type d'alliage de fonderie et de la temp\u00e9rature de coul\u00e9e ; il ne doit pas \u00eatre utilis\u00e9 \u00e0 une temp\u00e9rature sup\u00e9rieure \u00e0 celle pr\u00e9vue ;<\/p>\n
Choisissez la taille de pores appropri\u00e9e pour obtenir un v\u00e9ritable effet filtrant ;<\/p>\n
Les filtres ne permettent pas de r\u00e9guler la vitesse de versement.<\/p>","protected":false},"excerpt":{"rendered":"
Before using the alumina foam ceramic filter molten Alu filtration, use compressed air to blow off the surface dust and internal fragments to prevent impurities…<\/p>","protected":false},"author":1,"featured_media":9337,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9336","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\n
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