Ceramic casting core and method
AssigneeHowmet Corporation
InventorsRobert E. Grunstra, John Corrigan
Life of this patent
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Abstract
A ceramic core for use in casting an article such as for example an airfoil, wherein the ceramic core has a pocket located at or near a region of the core that is otherwise associated with occurrence of a localized casting defect in the cast article. A covering is disposed on the core to cover the pocket and provide core outer surface features.
Claims13
A method of making a ceramic core for use in casting a hollow article where the core is removed from the cast article to form a passage therein, comprising forming the ceramic core including machining or molding a pocket proximate a region of the core that is otherwise associated with occurrence of a localized casting defect in the cast article and covering said pocket to close off an open outer side of the pocket.
Dependencies are inferred from the claim text.