Patent ID: 7152448
Filing Date: 2006-12-26
Classification: B21C

Abstract:
1. An apparatus comprising: a wheel member having an endless circumferential groove therein, a stationary constraint die surrounding the perimeter of said wheel member and covering most of the length of the groove and forming a passageway with the groove having a rectangular shaped cross section, an abutment member projecting from the stationary constraint die into the groove and blocking one end of the passageway, the wheel member being rotatable relative to the stationary constraint die in the direction toward the abutment member, an output orifice in the stationary constraint die adjacent the abutment member and having substantially the same cross section as the cross section of the passageway, and an input orifice for feeding a solid metal workpiece to be pressed into a portion of the passageway remote from the abutment member so that the workpiece is carried in the groove by frictional drag in the direction towards the abutment member and is thereby extruded through the output orifice and without any substantial change in cross section.