Two piece mold used in manufacture of PDC drill bits and method of using same
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United States of America Patent
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Issued Date -
Apr 29, 2010
app pub date -
Oct 24, 2008
filing date -
Oct 24, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A graphite core mold having its own cavity is pressed into a cavity of a graphite shell mold. The core cavity is filled with tungsten carbide, mixed with a nickel alloy, heated and then cooled to thereby provide a carbide matrix body. After milling the carbide matrix body to thereby provide a carbide bit body, the intact shell mold is removed and then used again.
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