Metal founding – Means to shape a forming surface – Including means applying vacuum directly to mold material
Patent
1982-09-17
1986-01-28
Godici, Nicholas P.
Metal founding
Means to shape a forming surface
Including means applying vacuum directly to mold material
164 16, 164181, 164323, B22C 912, B22C 1522
Patent
active
045665214
ABSTRACT:
A hopper for providing moulding sand having an opened top and a bottom member having through holes for discharging the sand is positioned spaced apart at a suitable distance horizontally from a cover member connected to a suitable source for generating gas for hardening the moulding sand. A pattern plate provided with vacuum evacuating means is disposed to be selectively connected to either one of the hopper and the cover member for discharging and filling the moulding sands into a flask placed on a pattern plate and for introducing hardening gas and allowing said gas to penetrate and permeate through the layer of sand filled in the flask to harden the filled sand, respectively. By using vacuum evacuation of a hollow chamber in the pattern plate instead of pressurized air and hardening gas under pressure, the entire moulding apparatus can be rendered lighter in construction and smaller in size, while any leakage of poisonous hardening gas can be completely prevented from occurring.
REFERENCES:
patent: 2852818 (1958-09-01), Schallenberger et al.
patent: 3289256 (1966-12-01), Ferris
patent: 4077459 (1978-03-01), Buhrer
patent: 4077461 (1978-03-01), Buhrer
patent: 4129165 (1978-12-01), Edwards
patent: 4183427 (1980-01-01), Tomikawa
Komori Toshihisa
Matui Kazuharu
Toyoda Shigehiro
Uzaki Nagato
Godici Nicholas P.
Seidel Richard K.
Sintokogio Ltd.
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