SAND ADDITIVES FOR MOLDS/CORES FOR METAL CASTING
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United States of America Patent
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Issued Date -
Aug 9, 2012
app pub date -
Feb 4, 2011
filing date -
Feb 4, 2011
priority date (Note) -
Abandoned
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Abstract
A foundry mix composition including silica sand, unexpanded perlite ore, and a binder material. The unexpanded perlite ore is present in the foundry mix composition from about 0.5 wt % to about 5.0 wt %. Exemplary embodiments of the present invention also contemplate methods of making a sand mold/core from such a foundry mix composition.
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