Patent ID: 9364884
Filing Date: 2016-06-14
CPC Classification: B21D

Claim Text:
1. A stamping slug retention assembly adapted for a stamping operation, comprising: a die trim section having a die trim profile opening with interior trim profile walls and a taper relief disposed below the die trim profile opening, said die trim profile opening having a longitudinal central axis; wherein said die trim profile opening is adapted to receive a trim punch and retain a slug after said trim punch is withdrawn from said die trim profile opening; at least one recess along an edge of said die trim profile opening; wherein a radius of the recess tapers towards the taper relief, such that a width of the recess narrows towards the taper relief; wherein the recess extends at least to a boundary between the taper relief and the die trim profile opening; wherein a longitudinal axis of the recess is disposed parallel to a direction of movement of the trim punch; wherein said recess top end is disposed along said upper surface of said die trim section and along said edge of said die trim profile opening, and said recess bottom end is disposed along said interior die trim profile insert walls such that said recess is adapted to create a geometrical tab on an edge of a slug, which is progressively wedged against said recess as said slug is pushed into said die trim profile opening, thereby preventing said slug from being withdrawn from said die trim profile opening when said trim punch is removed.