Metal founding – Process – Shaping a forming surface
Patent
1988-12-16
1991-03-12
Seidel, Richard K.
Metal founding
Process
Shaping a forming surface
164361, B22C 900
Patent
active
049985817
ABSTRACT:
A reinforced ceramic investment casting shell mold and method of making such mold. The ceramic investment casting shell mold includes alternate, repeating layers of a ceramic material and a ceramic stucco defining an overall thickness of the shell mold. A fibrous reinforcing material is disposed in the alternate, repeating layers at an intermediate thickness of the shell mold. The fibrous reinforcing material has high tensile strength at elevated temperature and a coefficient of thermal expansion that is less than the coefficient of thermal expansion of the ceramic material and the ceramic stucco. The fibrous reinforcing material is preferably woven into a twisted yarn and disposed in a generally spiral configuration.
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Corrigan John
Crouch Philip D.
Lane Jan M.
Brown Edward A.
Howmet Corporation
Seidel Richard K.
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