Method and apparatus for removing core material
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United States of America Patent
Stats
-
Jan 10, 2012
Grant Date -
Jan 7, 2010
app pub date -
Jul 2, 2008
filing date -
Jul 2, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Core material is removed from a passage in a casting by exposing at least a portion of the core material in the passage to a leaching liquid. At least a portion of the core material in the passage is exposed to a gas. An opening to passage is exposed to a gas. At least a portion of the leaching liquid in the passage is boiled while the opening to the passage is exposed to a gas. At least a portion of the leaching liquid is expelled from the passage in the casting by the boiling action. To expose at least a portion of the core material in a passage to a leaching liquid, a flow of leaching liquid is conducted from a reservoir container to an operating container in which the casting is disposed. To expose at least a portion of the core material in the passage to a gas, a flow of leaching liquid is conducted from the operating container to the reservoir container.
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