Method of forming a cast metal article
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United States of America Patent
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Mar 12, 2013
Grant Date -
Nov 22, 2012
app pub date -
May 18, 2011
filing date -
May 18, 2011
priority date (Note) -
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Abstract
A cast metal article is formed with an internal cavity. The internal cavity is formed by a ceramic core which is removed from the cast metal article to leave the cavity. The ceramic core is formed with a cavity to facilitate removal of the core from the cast metal article. To remove the core from the cast metal article, the cavity in the core is filled with a leaching liquid.
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