Method of making a unitary pattern assembly

Details Method of making a unitary pattern assembly Method of making a unitary pattern assembly

B - Operations, Transporting

22

C

22/161

B22C 7/02 (2006.01)

Patent

CA 1064673

METHOD OF MAKING A UNITARY PATTERN ASSEMBLY ABSTRACT OF THE DISCLOSURE This invention involves a method of making a unitary pattern assembly which is useful in forming investment shell molds for the conventional and directional solidifi- cation of molten metals and alloys. It comprises providing a fixture having first and second pattern capturing means, providing a mold structure having a cavity, positioning the mold structure and fixture to expose the capturing means to the cavity, forming a pattern in the cavity and removing the mold structure from the pattern. A unitary pattern assembly comprising a fixture and pattern fixedly captured therein is obtained. Multiple patterns may also be captured in the fixture. The method is especially suitable for making a pattern assembly useful in the production of gas turbine engine blades by the "lost wax" process. -1-

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