Method and apparatus for making a sand core with an improved hardening rate
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United States of America Patent
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Dec 23, 2003
Grant Date -
Sep 18, 2003
app pub date -
Mar 18, 2002
filing date -
Mar 18, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a method and apparatus for making a sand mold (112) utilizing reverse purge air through a core box (100 and 100') to harden the binder in the sand mold (112) proximate the ejection pins (106 and 106'). The sand mold (112) may be removed from the core box (100 and 100') prior to drying the binder completely.
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