Method of and device for forming vacuum sealed molds

Details Method of and device for forming vacuum sealed molds Method of and device for forming vacuum sealed molds

1975-03-12

1977-03-01

Roethel, John E.

Metal founding

Process

Shaping a forming surface

164160, B22C 512

Patent

active

040097471

ABSTRACT:
A method of and device for forming vacuum sealed molds, in which suction is applied to a charging material charged into a flask to remove the charging material adjacent the top of a sprue or a communicating passage thereby forming a cup-shaped pouring basin for the sprue or a funnel-shaped concave for the passage in a mold, thereafter a shielding film is applied over the upper surface of the flask, and a suction is applied to the charging material within the flask.

REFERENCES:
patent: 2513785 (1950-07-01), Browne
patent: 3825058 (1974-07-01), Miuro et al.
patent: 3843301 (1974-10-01), Hijikata et al.

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