Method and apparatus for feeding liquid metal into a mold
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United States of America Patent
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Jan 5, 1993
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N/A
app pub date -
May 4, 1990
filing date -
May 5, 1989
priority date (Note) -
Expired
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Abstract
A mold containing a gasifiable or vaporizable disposable pattern 3, embedded in sand 4 without a binding agent, is fed through its base by a pressurized chamber 6 containing liquid cast metal. The pressure in the chamber 6 is regulated as a function of the surface area/volume ratio of the disposable pattern 3 to prevent the emergence of high-gloss carbon.
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