{"id":3121,"date":"2020-07-25T14:12:15","date_gmt":"2020-07-25T14:12:15","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=3121"},"modified":"2020-10-19T07:41:42","modified_gmt":"2020-10-19T07:41:42","slug":"ceramic-foam-filters-sizing","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/ar\/ceramic-foam-filters-sizing\/","title":{"rendered":"\u062a\u062d\u062f\u064a\u062f \u0645\u0642\u0627\u0633\u0627\u062a \u0627\u0644\u0645\u0631\u0634\u062d\u0627\u062a \u0627\u0644\u0631\u063a\u0648\u064a\u0629 \u0627\u0644\u062e\u0632\u0641\u064a\u0629"},"content":{"rendered":"

To obtain an optimum mold fill rate, it is important to calculate the proper Ceramic Foam Filters Sizing for each specific casting application. The filter must be large enough so that it doesn\u2019t retard or choke the flow of molten metal or become blocked with retained inclusions before the casting is completed. To achieve as close to the original unfiltered flow as possible, the filter must be several times larger than the choke area of the gating system. The following casting parameters must require careful consideration.<\/p>\n

\u062a\u062d\u062f\u064a\u062f \u0645\u0642\u0627\u0633\u0627\u062a \u0627\u0644\u0645\u0631\u0634\u062d\u0627\u062a \u0627\u0644\u0631\u063a\u0648\u064a\u0629 \u0627\u0644\u062e\u0632\u0641\u064a\u0629<\/h2>\n

Flow rate factors\u2013filter pore size number (10, 15, 25) and choke area of the gating system.<\/p>\n

Blockage factors\u2013filter pore size number (10, 15, 25) and melt quality including: melting stock, alloy chemistry, melt treatment and quantity of metal to be filtered.<\/p>\n

To achieve an adequate flow rate, the \u0645\u0631\u0634\u062d\u0627\u062a \u0627\u0644\u0631\u063a\u0648\u0629 \u0627\u0644\u062e\u0632\u0641\u064a\u0629<\/a> Sizing must be sized so its frontal area is several times greater than the total choke area in the gating system. As the filter area\/choke area increases, the mold fill rate increases exponentially. At filter area\/choke area ratios less than four, the filter significantly increases the pour time in comparison with unfiltered pouring.<\/p>\n

At filter area\/choke area rations above eight, the pour time is virtually unaffected by the filter. If the ratio is in the four-to-eight range, a slight increase in pouring time may be evident.<\/p>\n

It is generally recommended to use a filter area\/choke area ratio of at least four, but for thin-sectioned castings the ratio should be higher. Finer pore sizes (#15 and 25) slightly increase the filter flow restriction and may require a slight increase in the filter area. Multiplying the choke area by the desired filter\/choke area ratio yields the required filter size.<\/p>\n

It is important that the effective filter is used for the calculation. The effective filter area is defined as the inlet area of the filter that isn\u2019t covered by the print in the mold. The blockage factors are to be used as guidelines. Many foundries with sound metal processing practices are able to pass much more aluminum per square inch than mentioned in the table.<\/p>","protected":false},"excerpt":{"rendered":"

To obtain an optimum mold fill rate, it is important to calculate the proper Ceramic Foam Filters Sizing for each specific casting application. The filter…<\/p>","protected":false},"author":1,"featured_media":3122,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[1742],"class_list":["post-3121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-ceramic-foam-filters-sizing"],"yoast_head":"\nCeramic Foam Filters Sizing,Ceramic Foam Filter Manufacturing Process<\/title>\n<meta name=\"description\" content=\"It is important to calculate the proper ceramic foam filters sizing for each specific casting application, the filter must be large.\" \/>\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\/ar\/ceramic-foam-filters-sizing\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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