Conform product thermomechanical treatment

Details Conform product thermomechanical treatment Conform product thermomechanical treatment

1987-12-31

1989-04-25

Larson, Lowell A.

Metal deforming

By extruding through orifice

With product handling

72262, 72364, B21C 3100

Patent

active

048235865

ABSTRACT:
Apparatus for continuously extruding material includes a moving member and a stationary member forming a passageway therebetween for frictional feeding of the material to be extruded under pressure into the passageway. An abutment in the passageway forms a barrier to the material being fed therein, whereby the forces on the material heat it and cause it to yield. The heated material flows into an extrusion chamber adjacent to the abutment and is extruded from a die in a wall of the chamber. A cooling system provides first and second phases of quenching the extruded product separated by an interval of self-annealing to limit the surface grain size and the hardness of the extruded product. The product is subjected to the first phase of quenching immediately as it exists the die, to maintain the temperature of the extruded product at a desired fixed level at a selected point along the flow path of the extruded product downstream of the die.

REFERENCES:
patent: 3364707 (1968-01-01), Foerster
patent: 3368377 (1968-02-01), Hirayama et al.
patent: 3774431 (1973-11-01), Stromblad et al.

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