Methods and apparatus for initiating tubular extrusion

Details Methods and apparatus for initiating tubular extrusion Methods and apparatus for initiating tubular extrusion

1983-09-19

1985-10-15

Larson, Lowell A.

Metal deforming

By extruding through orifice

Utilizing internal forming means

72262, 72265, 722531, B21C 2504, B21C 3100

Patent

active

045466343

ABSTRACT:
Methods and apparatus for initiating extrusion of elongated hollow product, more particularly cylindrical tubular product, by increasing the space between the end of a mandrel and an opposed extrusion die during extrusion start-up and thereafter gradually decreasing the space to the desired width for extrusion of the product to enhance extrusion initiation.

REFERENCES:
patent: 770997 (1904-09-01), Beck et al.
patent: 2903130 (1959-09-01), Reichl
patent: 2964177 (1960-12-01), Scribner
patent: 3422648 (1969-01-01), Lemelson
patent: 3580038 (1971-05-01), Andreassian
patent: 3999415 (1976-12-01), Austen

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