Patent ID: 7913369
Filing Date: 2011-03-29
Classification: B30B,Y10T

Abstract:
1. A method of manufacturing a center pin for use inside of a punch and die powder compaction apparatus, where the center is an interior form for a battery component manufactured through the application of pressure using the compaction apparatus, comprising; forming a re-usable center pin base of a rigid material; independently forming, as a replaceable component, a center in tip of a wear-resistant material, said center pin tip including a generally cylindrical outermost surface having length greater than its diameter, wherein the wear-resistant material on the outermost surface of the center pin tip is resistant to abrasion from powder used in battery component manufacture; assembling the center pin tip and the center pin base such that the outermost surface of the center pin tip is exposed when assembled to the center pin base; and semi-permanently affixing the center pin tip to the center pin base to complete the center pin for use in a compaction tool as an interior form for a battery component; wherein the center pin tip is formed with a shoulder and a reduced diameter, tapered shaft extending therefrom and having the largest diameter at the end thereof, and where that the reduced diameter, tapered shaft is inserted into a hollow of the center pin base when the base is being heated, such that once the base is cooled, the reduced diameter, tapered shaft is retained within the hollow and affixed thereto.