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US 10,549,328 B2Granted
Dummy block for extrusion press
AssigneeExco Technologies Limited
InventorPaul Henry Robbins
Life of this patent
Estimating the term…
Abstract
A dummy block for a metal extrusion press comprises: a generally cylindrical base having a forward surface and an outwardly extending circumferential flange; an expandable collar coupled to the base, the collar having an inwardly extending circumferential rib abutting the circumferential flange; a collar support coupled to the base and abutting the collar; and a moveable plunger coupled to the base and accommodated by the collar. The plunger has a rear surface configured to abut the forward surface of the base.
Claims19
A dummy block for a metal extrusion press comprising:
- a generally cylindrical base having a planar forward surface and an outwardly extending circumferential flange;
- an expandable collar coupled to the base, the collar having an inwardly extending circumferential rib abutting the circumferential flange;
- a collar support coupled to the base and abutting the collar;
- and
- a moveable plunger coupled to the base and accommodated by the collar, the plunger comprising
- a forward portion having a frustoconical shape and defining a forward face configured to abut a billet during use, and
- a rear portion having a cylindrical shape and extending rearward from the forward portion, the rear portion defining a planar rear surface configured to abut the planar forward surface of the base, the planar rear surface and the planar forward surface having equal areas and equal diameters.
4 more elements
A metal extrusion press comprising:
- a dummy block having:
- a generally cylindrical base having a planar forward surface and an outwardly extending circumferential flange,
- an expandable collar coupled to the base, the collar having an inwardly extending circumferential rib abutting the circumferential flange,
- a collar support coupled to the base and abutting the collar, and
- a moveable plunger coupled to the base and accommodated by the collar, the plunger comprising
- a forward portion having a frustoconical shape and defining a forward face configured to abut a billet during use, and
- a rear portion having a cylindrical shape and extending rearward from the forward portion, the rear portion defining a planar rear surface configured to abut the planar forward surface of the base, the planar rear surface and the planar forward surface having equal areas and equal diameters;
- a stud or elongate projection coupled to the base;
- and
- an extrusion ram abutting the dummy block and having a central cavity accommodating the stud or elongate projection, a portion of the central cavity having a concave rear surface.
7 more elements
Dependencies are inferred from the claim text.