Metal extrusion process and extrusion press

Details Metal extrusion process and extrusion press Metal extrusion process and extrusion press

1994-05-06

1997-03-25

Larson, Lowell A.

Metal deforming

By extruding through orifice

Container and/or support therefor

B21C 2700

Patent

active

056133936

ABSTRACT:
A process for extrusion of a metal billet placed in a container delimiting a housing for the billet. One end of the container is closed by a closing bottom and the other end by a dummy block. Before extrusion, the billet is pre-compressed in order to apply it against the inner face of the housing. At the start of the pre-compression, a limited play is maintained between the closing bottom and the corresponding end of the container, preventing the container from approaching the closing bottom during pre-compression so as to allow evacuation of air contained between the billet and the inner housing face during expansion of the billet.

REFERENCES:
patent: 1935286 (1933-11-01), Born
patent: 2822087 (1958-02-01), Lorant
patent: 5445004 (1995-08-01), Nannini et al.

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