Die forming metallic sheet materials

Details Die forming metallic sheet materials Die forming metallic sheet materials

1991-07-23

1992-02-04

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72 54, 72 56, B21D 2602

Patent

active

050850687

ABSTRACT:
A process and apparatus for forming a sheet material by drawing it into a die cavity (12) utilizing the flow of a viscous thermoplastic polymer medium extruded against the sheet (22) and/or extruded out of said die cavity (12) through a plurality of passageways, (14a), (14b), and (14c) and programmably varying said extrusion of said medium to cause the sheet material to be controllably stretched into the cavity and shaped.

REFERENCES:
patent: 1625914 (1927-04-01), Seibt
patent: 3529458 (1970-09-01), Butler et al.
patent: 4502309 (1985-03-01), Hamilton et al.
patent: 4934441 (1976-01-01), Hamilton et al.

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