Embossing method

Details Embossing method Embossing method

1975-03-25

1976-03-16

Mehr, Milton S.

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72 58, 72 62, 72358, B21D 2604

Patent

active

039437418

ABSTRACT:
A cup-shaped blank is extruded through a die onto a cylindrical non-collable mandrel having an external surface pattern counter to a desired internal embossment. Subsequently, the embossed portion of the blank is hydrostatically expanded away from the mandrel to permit removal of the embossed part from the mandrel. The application of hydrostatic pressure to the exterior of the blank during the extruding operation is disclosed.

REFERENCES:
patent: 1199414 (1916-09-01), Pomeroy
patent: 3056197 (1952-10-01), Lawson
patent: 3698221 (1972-10-01), Couland

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