Press-forming mold and method for manufacturing protective film for press-forming mold

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United States of America Patent

PATENT NO 9902093
SERIAL NO

14009522

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Abstract

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A press-forming mold has a protective film for preventing seizing during press-forming formed on at least a forming surface that comes into contact with a formed body. The protective film is formed by PVD. An arbitrary selection section extracted from the surface of the protective film is divided into a plurality of individual sections; and, when the gradient of the surface at the nth division point is represented by (dZn/dXn), taking N to represent the number of divisions, the root-mean-square RΔq calculated by the following numerical expression is no greater than 0.032.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL LTD )2-4 WAKINOHAMA-KAIGANDORI 2-CHOME CHUO-KU KOBE-SHI HYOGO 651-8585
KOSHUHA ALL METAL SERVICE CO LTD328 UEKINO-MACHI OTA-SHI GUNMA 373-0014

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kashi, Takaharu Imizu, JP 1 1
Yamamoto, Kenji Kobe, JP 666 5727

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