Patent ID: 6860172
Filing Date: 2005-03-01
Classification: B22F,Y10T

Abstract:
1. A method for producing a powdered metal compact in a punch and die assembly, the powdered metal compact having a bore, at least one recess and at least one aperture communicating between the bore and the at least one recess, the method comprising: providing a top punch having a forward end with at least one first protruding member; providing a bottom punch having a forward end with at least one second protruding member; positioning the top and bottom punches in a die with the forward end of the top punch facing the forward end of the bottom punch and with a metal powder therebetween; compacting the metal powder by pressing the top and bottom punches towards each other until the at least one first protruding member abuts the at least one second protruding member at at least one region of contact, wherein the bore is formed by a volume of space delimited by the at least one second protruding member between the top and bottom punches and the at least one aperture is formed at the at least one region of contact; and removing the top punch and ejecting the metal powder compact from the die.