Quasi self-destructive core for investment casting
AssigneeSikorsky Aircraft Corporation
InventorsShihong G. Song, James S. Giampapa, John H. Meeson, JR.
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Abstract
A composite core for forming a passage in an investment casting mold is provided including a generally hollow structural element. The structural element is configured to deform when a force is applied to an end thereof. A rigid shell element is formed about the structural element. The shell element extends beyond both an interior surface and an exterior surface of the structural element. The shell element is configured to shatter when the structural element deforms.
Claims14
A method for manufacturing a composite core for forming a passage in an investment casting mold comprising:
- arranging a core element adjacent an interior surface of a generally hollow structural element to form a preform;
- layering slurry having particles of varying sizes about the structural element of the preform;
- and
- applying heat to the preform.
A method for forming a passage in a cast component comprising:
- arranging a composite core into an interior of a mold;
- pouring material of the component into the mold;
- curing the material to form the component;
- applying a force to an exposed portion of the composite core such that the composite core deforms inside the component.
Dependencies are inferred from the claim text.