Pressing method and punch and die press for the same

Details Pressing method and punch and die press for the same Pressing method and punch and die press for the same

1984-12-20

1987-09-01

Larson, Lowell A.

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72465, B21D 2210

Patent

active

046899790

ABSTRACT:
A method of pressing a blank comprises the steps of pressing the blank between a die assembly having a cavity with a highly viscous substance contained therein and a punch, inserting the punch into the cavity to increase a pressure of the highly viscous substance in the cavity, and pressing the blank against a surface of the punch under the pressure of the highly viscous substance. The pressing method can form pressed product of complex shape highly accurately and free from cracks, wrinkles, or other damages. There is also disclosed a punch and die press suitable for effecting the abovesaid pressing method.

REFERENCES:
patent: 1012401 (1911-12-01), McCullough
patent: 3066556 (1962-12-01), Jaskowiak
patent: 3208255 (1965-09-01), Burk
patent: 3264854 (1966-08-01), Carlisle
patent: 3418836 (1968-12-01), Olson
patent: 3533256 (1970-10-01), Hurek
patent: 3635061 (1972-01-01), Rydell
patent: 3962895 (1976-06-01), Rydell
patent: 4314468 (1982-02-01), Basil
patent: 4392368 (1983-07-01), Folkessa

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