Metal founding – Process – Shaping a forming surface
Patent
1977-08-01
1979-01-09
Spicer, Jr., Robert L.
Metal founding
Process
Shaping a forming surface
164 60, 164235, B22C 904, B22C 702
Patent
active
041333683
ABSTRACT:
An improved mold for casting single crystal metallic articles is disclosed and comprises a ceramic investment mold having a main article cavity and having embedded at its lower end below the article cavity and in communication therewith a preformed ceramic single crystal starter insert. The preformed starter insert generates a plurality of single metallic crystals in a growth cavity and then selects one crystal for further propagation through the article cavity. A method for making such a mold is also disclosed.
REFERENCES:
patent: 2770859 (1956-11-01), Henry
patent: 3461949 (1969-08-01), Nilson
patent: 3598172 (1971-08-01), Copley
Lin K. Y.
Spicer, Jr. Robert L.
Timmer Edward J.
United Technologies Corporation
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