Gelatin coated sand core and method of making same
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United States of America Patent
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-
Oct 22, 2002
Grant Date -
Mar 7, 2002
app pub date -
Jul 23, 2001
filing date -
Jul 24, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method of making a molded article for use in a casting process, sand particles are mixed with protein and water to effect a coating of protein on the sand particles. Then, the protein coated sand particles are dried and blown into a pattern mold to form a molded article without active cooling of the coated sand particles. Steam is then passed through the molded article to hydrate and melt the protein, thereby forming bonds between contiguous sand particles. Finally, hot, dry air is passed through the molded article to harden the protein bonds between the contiguous sand particles. This forms a protein coated sand core for use in casting molten metals.
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