Replaceable ring for dummy block

Details Replaceable ring for dummy block Replaceable ring for dummy block

1996-07-18

1998-06-30

Larson, Lowell A.

Metal deforming

By extruding through orifice

Indirect extrusion

B21C 2500

Patent

active

057717346

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 plunger head having a planar face and the collar having a forward planar face; 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 plunger head face is essentially planar with the face of said collar.

REFERENCES:
patent: 3282074 (1966-11-01), Gardner
patent: 3303684 (1967-02-01), Starr et al.
patent: 3630064 (1971-12-01), Mahns
patent: 3831418 (1974-08-01), Bogdanov et al.
patent: 3919873 (1975-11-01), Biswas et al.
patent: 3977226 (1976-08-01), Mann et al.
patent: 4024743 (1977-05-01), Decours et al.
patent: 4550584 (1985-11-01), Degen
patent: 4714423 (1987-12-01), Hattori et al.
patent: 5272900 (1993-12-01), Robbins
patent: 5311761 (1994-05-01), Robbins

Affiliated with

Also associated with

Rating

Replaceable ring for dummy block does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Replaceable ring for dummy block, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Replaceable ring for dummy block will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1848578