Metal deforming – By extruding through orifice – Indirect extrusion
Patent
1982-05-04
1984-08-07
Larson, Lowell A.
Metal deforming
By extruding through orifice
Indirect extrusion
72263, 72270, B21C 3300, B21C 3506
Patent
active
044635893
ABSTRACT:
An indirect extrusion press including a die assembly having a loose die detachably mounted on a die stem and axially movable relative to a billet container for extruding a billet through a die hole, and a die handling mechanism for transferring the die assembly between the press center and a position outside the press machine, the indirect extrusion press including a reduced diameter portion provided in the rear end portion of the die stem and defining a stepped wall portion; a loose die detachably mounted on the end face of the reduced diameter portion; and a detachable cleaning ring loosely fitted on the reduced diameter portion of the die stem in abutting engagement with the stepped wall portion and in axially spaced relation with the loose die, the cleaning ring being in sliding engagement with the inner periphery of the billet container in the extruding phase of the press operation to remove container shells. The press may further include as part of the die handling mechanism a chuck member for releasably gripping the loose die and cleaning ring and movable for transferring the die and ring in spaced relation between the press center and a retracted position outside the press machine, and a knocking member movable into the space between the loose die and cleaning ring at the retracted position to knock off container shells from a gap between the loose die and the cleaning ring.
REFERENCES:
patent: 1609988 (1926-12-01), Bull
patent: 3314267 (1967-04-01), Kent et al.
patent: 3530702 (1970-09-01), De Ridder
patent: 4048832 (1977-09-01), Raab et al.
patent: 4154081 (1979-05-01), Boshold
patent: 4379398 (1983-04-01), Asari et al.
Asari Akira
Masuda Tsuneharu
Mizoguchi Masao
Noyori Tatsuhiko
Tabuchi Takahisa
Kabushiki Kaisha Kobe Seiko Sho
Larson Lowell A.
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