Method for controlling die-retaining force of extruder

Details Method for controlling die-retaining force of extruder Method for controlling die-retaining force of extruder

1993-12-20

1995-10-03

Larson, Lowell A.

Metal deforming

By extruding through orifice

Pressure or velocity conditioning

72272, B21C 3100

Patent

active

054542502

ABSTRACT:
A method and apparatus for controlling the die-retaining force of an extruder is disclosed. In the operation of an extruder adapted to retain a die with a container actuated by a container cylinder and effect extrusion of a billet readied for use in the container by forcing the billet through the die, to keep the die-retaining force of the extruder constant, the control of the die-retaining force of the extruder is carried out by causing the container cylinder to impart to the container a force directed away from the die so as to be sequentially decreased during the first half period of the extrusion and causing the container cylinder to impart to the container a force directed toward the die so as to be sequentially increased during the last half period of the extrusion.

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