Impregnated ceramic core and method of making
AssigneeHowmet Research Corporation
InventorRodney S. Haaland
Life of this patent
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Abstract
An impregnated fired, porous ceramic core for use in an investment casting shell mold in the casting of molten metals and alloys is strengthened by impregnating the core with an aqueous emulsion of water-insoluble polymer followed by drying to remove the water.
Claims13
A method of strengthening a fired, porous ceramic investment casting core comprising:
- impregnating the fired, porous ceramic investment casting core with an aqueous emulsion of a water-insoluble polymer, and
- drying the impregnated core to remove water.
A method of strengthening a fired, porous ceramic investment casting core comprising impregnating the fired porous ceramic investment casting core with an aqueous emulsion of a water-insoluble acrylic polymer and drying the impregnated core to remove water.
A method of strengthening a fired, porous ceramic core having an airfoil shaped region for use in investment casting, comprising:
- impregnating the fired, porous ceramic core having the airfoil shaped region with an aqueous emulsion of a water-insoluble polymer, and
- drying the impregnated core to remove water.
A method of strengthening a fired, porous ceramic core having an airfoil shaped region for use in investment casting, comprising impregnating the fired, porous ceramic core having the airfoil shaped region with an aqueous emulsion of a water-insoluble acrylic polymer and drying the impregnated core to remove water.
Dependencies are inferred from the claim text.