Method and apparatus for manufacturing gas-hardened molds

Details Method and apparatus for manufacturing gas-hardened molds Method and apparatus for manufacturing gas-hardened molds

1996-10-23

1999-03-30

Lin, Kuang Y.

Metal founding

Process

Shaping a forming surface

164 37, 164169, B22C 1523, B22C 15272, B22C 15276

Patent

active

058876391

ABSTRACT:
A method and apparatus is provided for increasing the packing density and strength of sand for gas-hardening casting molds. The method is characterized by the steps of filling spaces defined by a pattern plate 1 and a mold frame with gas-hardening casting sand 4, depressurizing a closed container 3 after the filled assembly has been conveyed thereinto, introducing air into the container 3, applying a pressure to the upper surface of the casting sand to increase its packing density, and hardening the casting sand by a hardening gas.

REFERENCES:
patent: 5558148 (1996-09-01), Uzaki et al.

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