Dummy block construction

Details Dummy block construction Dummy block construction

1997-05-23

1999-07-06

Hail, III, Joseph J.

Metal deforming

By extruding through orifice

Indirect extrusion

B21C 2500

Patent

active

059184981

ABSTRACT:
In a dummy block construction for use in extruding an extrudable metal, the dummy block having a dummy block base; a connector for connecting said dummy block base to a stem of an extruder; a replaceable wear ring connected to a forward circumferential portion of said dummy block base; a device for releasably securing said wear ring to said dummy block base; a device for expanding said ring to engage a billet container inside wall of an extrusion press during extrusion of a billet of extrudable metal through such extrusion press, the improvement being characterized in the wear ring being a metal collar having a conical interior surface converging towards said dummy block base; and the device for expanding the ring comprising a metal plunger having a plunger head with a conical surface for engaging the collar conical surface to expand the collar as said plunger head is forced into the collar during extrusion; the converging surfaces of the collar and the plunger head extending a sufficient distance to permit telescoping of the plunger head into the collar to an extent whereby the collar is expanded to engage the billet container inside wall.

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