Investment cast airfoil core/shell lock and method of casting

Details Investment cast airfoil core/shell lock and method of casting Investment cast airfoil core/shell lock and method of casting

1989-12-26

1991-09-24

Seidel, Richard K.

Metal founding

Process

Shaping liquid metal against a forming surface

164 30, 164340, 164361, 164370, B22C 910, B22D 3304

Patent

active

050506650

ABSTRACT:
The tapered core/shell lock includes notches which, in conjunction with protrusions from the shell mold, prevent axial slip of the core main body. In addition, the core/shell lock provides a tapered core print area which is much larger, and extends further into the shell mold, then the conventional "T" bar core/shell lock. By increasing the axial length of the core print area, shifting at the tip of the core main body is reduced, while tapering of the core print eliminates the need to lacquer slip the end of the core/shell lock, eliminating addtional sources of core shift.

REFERENCES:
patent: 4093017 (1978-06-01), Miller, Jr. et al.
patent: 4487246 (1984-12-01), Frasier
patent: 4596281 (1986-06-01), Bishop
patent: 4627480 (1986-12-01), Lee

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