Method for demoulding a casting, cast from a light metal melt, from a casting mould
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United States of America Patent
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Feb 20, 2018
Grant Date -
Jul 7, 2016
app pub date -
Sep 4, 2013
filing date -
Sep 4, 2013
priority date (Note) -
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Abstract
A method for demolding a casting from a casting mold having at least one casting core which images a passage opening in the casting connecting two outer sides of the casting and is produced from a molding material bound by a binder which decomposes under the influence of temperature, wherein the casting mold undergoes a heat treatment in a furnace for the demolding, during which it is heated to a temperature at which the binder loses its binding effect. In the furnace, hot gas is flowed through a passage formed in the casting core of the casting mold, the temperature of the hot gas corresponding at least to the temperature at which the binder of the molding material loses it binding effect such that the casting core decomposes into fragments or separate sand particles as a consequence of the influence of the hot gas.
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