Method of producing a metal mold

Details Method of producing a metal mold Method of producing a metal mold

1993-10-07

1994-07-19

Bradley, P. Austin

Metal founding

Process

Shaping a forming surface

164 63, 164 65, 1641602, B22D 1800, B22D 1806

Patent

active

053299817

ABSTRACT:
A method of producing a metal mold is disclosed. A heat resistant sheet is forcedly brought into close contact with a product configuration surface of a matrix such as a wooden pattern, a resin model, or the like by making use of negative pressure. The matrix is brought into contact with a melt of a low melting-point alloy while that state of close contact is being maintained and the melt is allowed to cool as it is, thereby casting one part of the mold which makes up a pair. The matrix is then removed, and by using the one part of the mold thus cast as a new matrix, this new matrix is brought into contact with the melt of a low melting-point alloy via the heat resistant rubber sheet and is allowed to cool as it is, thereby casting a counterpart of the mold that makes up the pair.

REFERENCES:
patent: 3548050 (1967-04-01), Mozer
patent: 3789907 (1974-02-01), Nakata
patent: 4043376 (1977-08-01), Kasai
patent: 4217946 (1980-08-01), Murahashi
"Metal Press" Nov. 1976, pp. 16 and 17.
Japanese Laid-Open Technical Report No. 89-6998 (vol. 14-24), May 20, 1989.

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