Method and apparatus for extruding metal

Details Method and apparatus for extruding metal Method and apparatus for extruding metal

1989-02-21

1991-02-05

Larson, Lowell A.

Metal deforming

By extruding through orifice

With cutting

72270, B21C 3504

Patent

active

049894374

ABSTRACT:
A method and apparatus for extruding metal using the reverse method in which a billet placed in the bore of a container is compressed between a base and an extruding block. Billets are extruded in the raw state without prior removal of the outer layer, leaving a play sufficient to form a sleeve of a thickness at least equal to that of the outer layer to be removed, between the periphery of the block and the inner face of the bore, along the inner face. The bore is then scraped, using a scraping block whose periphery is separated from the inner face of the bore by a play which is less than the thickness of the sleeve but sufficient for the sleeve to be removed over a part only of its thickness.

REFERENCES:
patent: 3563079 (1971-02-01), Monie et al.
patent: 3630064 (1971-12-01), Mahns
patent: 3810379 (1974-05-01), Schlogelhofer

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