Composite mold with fugitive metal backup
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United States of America Patent
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Issued Date -
Aug 30, 2007
app pub date -
Feb 27, 2006
filing date -
Feb 27, 2006
priority date (Note) -
Abandoned
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Abstract
Composite mold for use in casting a metal or alloy includes an inner mold region that includes a mold cavity and a fugitive metallic outer backup mold region residing on the inner mold region, wherein the metallic material of the backup mold region has such a melting temperature that the backup mold region melts from the inner mold region after the molten metal or alloy is cast and at least partially solidified in the mold. The inner mold region can comprise a non-metallic refractory or ceramic shell mold, while the backup mold region can comprise tin or other relatively low melting point metal or alloy.
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