Self supporting core-in-a-core for casting
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United States of America Patent
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Jun 12, 2012
Grant Date -
Jun 7, 2012
app pub date -
Jul 1, 2011
filing date -
Jul 2, 2010
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A core-in-a-core casting method and hybrid core (40) for use in the method. An inner core (42) formed of process-inert particles disposed in a binder material is used as a mold for casting an outer core ((44) formed of particles that will sinter during a subsequent firing step. The inner core provides mechanical support for the outer core during the firing step, and during which the inner core devolves into compacted but unbonded particles that can be removed conveniently from the outer core following the firing step to reveal the fired hollow outer core (44).
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