Vacuum sealed molding process for producing molds having a deep

Details Vacuum sealed molding process for producing molds having a deep Vacuum sealed molding process for producing molds having a deep

1974-04-26

1976-05-11

Silbaugh, Jan H.

Metal working

Method of mechanical manufacture

Shaping by direct application of fluent pressure

29428, 164 7, 164160, 264 89, 264 92, 264219, 264DIG78, 425388, B22C 900, B29C 102, B29C 1704

Patent

active

039552667

ABSTRACT:
A molding process for casting operations in which castings having a deep concave portion or a high convex portion such as pots and bathtubs are cast using vacuum sealed molds on which films are applied to be in tight contact with them, and a film forming auxiliary device for use in molding such vacuum sealed molds.

REFERENCES:
patent: 2990581 (1961-07-01), Rowe, Jr.
patent: 3088174 (1963-05-01), Kolt
patent: 3235639 (1966-02-01), Knowles
patent: 3342914 (1967-09-01), Edwards
patent: 3400111 (1968-09-01), Schwartz
patent: 3405026 (1968-10-01), Roberts
patent: 3419455 (1968-12-01), Roberts
patent: 3789907 (1974-02-01), Nakata et al.
patent: 3843301 (1974-10-01), Hijikata et al.
Philip F. Charles, Plastics World, "Engineer's Report - Vacuum Systems for Thermoforming," 4-1963, Vol. 21, No. 4 p. 34.

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