Process for producing sand mold
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United States of America Patent
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Feb 11, 1997
Issued Date -
N/A
app pub date -
Nov 19, 1993
filing date -
Jul 5, 1990
priority date (Note) -
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Abstract
A foundry mold is produced from sand by blending, with one another, sand, a binder comprising a ester cured-phenolic resin, a curing agent comprising an organic ester compound and one or more additives containing therein a metal of the groups IB to VIII, and molding and curing the mixture into a foundry mold. The mixture is useful in a self-curing molding method and a vapour curing molding method, and the resulting mold is thereby provided with an unexpected improved mechanical strength. In particular the invention is advantageously effective with used or reclaimed refractory sand.
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