filtro de espuma cer\u00e2mica de alumina<\/a> \u00c9 necess\u00e1rio que haja uma certa altura manom\u00e9trica para iniciar a filtra\u00e7\u00e3o, a fim de superar o obst\u00e1culo da tens\u00e3o superficial. O valor da altura manom\u00e9trica tem um efeito consider\u00e1vel no in\u00edcio da filtra\u00e7\u00e3o. Geralmente, ela deve ser superior a 400 mm. O indentador deve ser proporcionalmente maior.<\/p>\nA parte de sobreposi\u00e7\u00e3o entre o filtro de espuma cer\u00e2mica e o molde deve ser vedada o m\u00e1ximo poss\u00edvel para evitar a perda de metal fundido pela fresta e para que o efeito de filtragem seja alcan\u00e7ado. Em alguns moldes de areia, como os moldes \u00famidos, o uso exclusivo do filtro de espuma cer\u00e2mica pode facilmente causar a queda da areia no local onde o filtro est\u00e1 posicionado. Dessa forma, \u00e9 necess\u00e1rio projetar um assento de filtro para sustent\u00e1-lo, de modo que ele n\u00e3o se mova sob o impacto do metal fundido, evitando que part\u00edculas de areia entrem na cavidade e que ocorra perda de metal fundido.<\/p>\n
Princ\u00edpios da filtragem de alum\u00ednio fundido por filtro de espuma cer\u00e2mica<\/strong><\/p>\nQuanto mais pr\u00f3xima a posi\u00e7\u00e3o de coloca\u00e7\u00e3o estiver da cavidade de fundi\u00e7\u00e3o, melhor, o que reduz a probabilidade de oxida\u00e7\u00e3o secund\u00e1ria;<\/p>\n
O projeto do sistema de canaliza\u00e7\u00e3o deve ser simples, e outras medidas de reten\u00e7\u00e3o de esc\u00f3ria podem ser desconsideradas, o que pode melhorar a taxa de utiliza\u00e7\u00e3o do molde de areia e a taxa de produ\u00e7\u00e3o do processo;<\/p>\n
A \u00e1rea de trabalho do filtro deve ser de 4 a 6 vezes a se\u00e7\u00e3o transversal de bloqueio do sistema de canaliza\u00e7\u00e3o, a fim de garantir que a velocidade de vazamento n\u00e3o seja afetada;<\/p>\n
Selecione o filtro adequado de acordo com o tipo de liga de fundi\u00e7\u00e3o e a temperatura de vazamento, e n\u00e3o o utilize acima da temperatura indicada;<\/p>\n
Escolha o tamanho de poro adequado para realmente obter o efeito de filtragem;<\/p>\n
Os filtros n\u00e3o podem ser usados para controlar a velocidade de vazamento.<\/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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