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Patent Searching and Data


Title:
METHOD OF MANUFACTURING A PIN FOR A MOLD FOR A DIE CASTING PROCESS
Document Type and Number:
WIPO Patent Application WO/2017/124435
Kind Code:
A1
Abstract:
A method of manufacturing a pin(46) for a mold(28) includes forming the pin(46) to include a substantially uniform initial hardness throughout the entire structure of the formed pin(46). The formed pin(46) is then processed with a hardening process, such that the processed pin(46) exhibits a hardness defining a hardness gradient that gradually increases from the initial hardness at a central interior region(56) of the pin(46) to an increased surface hardness at an exterior surface(60) of the pin(46). After processing the pin(46) with the hardening process, a coating(64) maybe deposited onto the exterior surface(60) of the pin(46) with a physical vapor deposition process. The coating(64) exhibits a hardness that is greater than the hardness of the increased surface hardness of the exterior surface(60) of the pin(46). The pin(46) may include, for example, a core pin, a squeeze pin, or an ejector pin.

Inventors:
HU BIN (CN)
WANG PAN (CN)
XU YIWU (CN)
Application Number:
PCT/CN2016/071753
Publication Date:
July 27, 2017
Filing Date:
January 22, 2016
Export Citation:
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Assignee:
GM GLOBAL TECH OPERATIONS LLC (US)
International Classes:
C21D8/00; B29C33/00
Foreign References:
CN102909373A2013-02-06
CN103114185A2013-05-22
Attorney, Agent or Firm:
LIU, SHEN & ASSOCIATES (Building 110 Caihefang Road, Haidian District, Beijing 0, CN)
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