Lost foam pattern for molding and method of making same

Details Lost foam pattern for molding and method of making same Lost foam pattern for molding and method of making same

1992-11-13

1994-09-20

Lin, Kuang Y.

Metal founding

Process

Shaping a forming surface

164 45, B22C 904

Patent

active

053480694

ABSTRACT:
A molding lost foam pattern made out of synthetic resin is decomposed and gasified by molten metal. The molding lost foam pattern includes a runner portion foam pattern extending vertically. The runner portion foam pattern includes a hollow portion and a base portion. A plurality of short-sized gate portion foam patterns are provided on external surfaces of the hollow portion of the runner portion foam pattern, and a product portion foam pattern is connected to the external surfaces of the hollow portion through the plurality of short-sized gate portion foam patterns. A method of making the molding lost foam pattern is also disclosed.

REFERENCES:
patent: 4766942 (1988-08-01), Wessman et al.
patent: 4819711 (1989-04-01), Chancellor

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