Method for compressing granular molding materials
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United States of America Patent
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-
Nov 10, 1992
Grant Date -
N/A
app pub date -
Apr 19, 1991
filing date -
Apr 20, 1990
priority date (Note) -
Expired
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Abstract
Foundry moldings are manufactured in an economic manner without increasing cycle time comprises a 3-stage method including the steps of feeding the molding material by means of compressed air into a molding container and thereafter precompressing the molding material by applying a pressure surge to the surface thereof and thereafter recompressing said precompressed molding material to final compression. The resulting foundry moldings are homogeneous in structure and structural integrity.
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