METHOD FOR PRODUCING INVESTMENT CASTINGS
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United States of America Patent
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Issued Date -
Jul 10, 2014
app pub date -
Aug 10, 2012
filing date -
Aug 19, 2011
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Abandoned
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Abstract
A method for producing investment castings, preferably in ceramic moulds, from alloys based on Al, Mg, Cu, Zn and Fe, characterised in that the ceramic mould is baked at temperatures of 800-1000° C. for 2-4 hours, then the mould is cooled to a temperature of 20-950° C. and is held at this temperature for 10-40 minutes, then it is poured with liquid alloy overheated by from 50 to 200° C. above the initial melting point and after a lapse of 10-100 seconds, the mould is immersed at a fixed or variable speed in a liquid cooling medium, which is a 1-99 volume percent aqueous solution of liquid polymer at a temperature of 15-85° C.
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