Method of manufacturing formed articles, equipment for practicin

Details Method of manufacturing formed articles, equipment for practicin Method of manufacturing formed articles, equipment for practicin

1980-03-31

1982-12-28

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72465, B21D 2200

Patent

active

043654991

ABSTRACT:
A thin sheet having a low rigidity is drawn while being depressed over the radiused corner of a die by elastic force or hydrostatic force to obtain a formed article whose sidewall part and flange part have no wrinkles. The force is applied through an annular rigid body on which elastic is exerted. The hardness of the rubber is preferably approximately 70 to 85 in accordance with ASTM D 2240 Durometer A. A laminate not more than about 200 .mu.m in thickness and consisting of a thermoplastic resin film, aluminum foil and a heat-sealable resin film is drawn into a formed article or a container which is light in weight and suitable for containing foods, for instance.

REFERENCES:
patent: 2697057 (1954-12-01), Senger et al.
patent: 2843071 (1958-07-01), Kitzinger
patent: 2980046 (1961-04-01), McGregor et al.
patent: 3884154 (1974-10-01), Bozel

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