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Improving Punch Life

IP.com Disclosure Number: IPCOM000080154D
Original Publication Date: 1973-Nov-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Yardley, JV: AUTHOR

Abstract

In punching abrasive materials such as ceramic, even with hardened steel tools, the punches rapidly wear requiring frequent replacement. It has been found that by laminating a film of MYLAR* to the sheet of green ceramic, and then punching through the MYLAR and then the ceramic material, greatly increased punch life is attained. It appears that as the punch pierces the MYLAR, the MYLAR assumes the shape of the punch forming a protective coating to the face of the punch. Thus as each hole is punched, it is effectively with a new punch inasmuch as the previous ceramic slug and MYLAR piece is removed after each punching operation. * Trademark of E. I. du Pont de Nemours & Co.

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Improving Punch Life

In punching abrasive materials such as ceramic, even with hardened steel tools, the punches rapidly wear requiring frequent replacement. It has been found that by laminating a film of MYLAR* to the sheet of green ceramic, and then punching through the MYLAR and then the ceramic material, greatly increased punch life is attained. It appears that as the punch pierces the MYLAR, the MYLAR assumes the shape of the punch forming a protective coating to the face of the punch. Thus as each hole is punched, it is effectively with a new punch inasmuch as the previous ceramic slug and MYLAR piece is removed after each punching operation. * Trademark of E. I. du Pont de Nemours & Co.

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