Patent ID: 6223579
Filing Date: 2001-05-01
Classification: B21D,F02B

Abstract:
A core die formation apparatus for the formation of a core plug from a core blank having a recessed region comprising:said recessed region of said core blank comprising at least one grooved surface formed therein;a second die member having a top surface, a blank accepting region and a substantially perpendicular opening extending through at least a portion of the second die member;the opening includes an introduction region parallel to the blank accepting region, a transition region, and an end region, wherein the size of the opening at the introduction region is smaller than the size of the core blank and greater than the size of the opening at the end region;the transition region comprises a substantially continuous surface providing a substantially smooth, gradual transition from the introduction region to the end region, to, in turn, facilitate smooth formation of the core blank into the core plug, without substantially affecting the grooved surfaces of the core blank; andmeans for propelling the core blank from the top surface of the second die member through the end region of the opening, to, in turn, render a core plug.