Investment casting slurry composition and method of use
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United States of America Patent
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Oct 9, 2007
Grant Date -
N/A
app pub date -
Apr 1, 2006
filing date -
Apr 5, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An investment casting method involves producing a casting shell by applying a hardenable moist mixture to a sacrificial pattern. To hasten the hardening of the moist mixture to create the shell, a stucco coat is subsequently applied to the mixture. In some cases, the stucco coat comprises a drier mixture of the elements used in the moist mixture. The drier mixture preferably includes a material that alters the alkalinity of the underlying moist mixture. In some cases, the stucco coat also includes an amorphous mineral silicate. Once the shell is created, a molten metal is introduced into the shell to replace the sacrificial pattern, thereby producing a metal cast item.
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