Foundry mold composition, foundry mold made therefrom and method for producing the same
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United States of America Patent
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Dec 13, 1994
Grant Date -
N/A
app pub date -
Jan 22, 1993
filing date -
Jan 22, 1993
priority date (Note) -
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Abstract
A composition for use in producing a foundry mold, a foundry mold of the composition and a method for making the foundry mold from the composition. The composition includes sodium smectite clay and at least one of a metal oxide, hydroxide or salt as a mineral clay component of the composition. This mineral clay component is present in the composition along with water and foundry sand. The metal of the oxide, hydroxide or salt may be aluminum, calcium, iron, potassium, magnesium, boron or zinc. The sodium smectite clay may be at least one of bentonite, hectorite or saponite.
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