PRESS MOLDING DEVICE, PRODUCTION METHOD FOR PRESS MOLDED ARTICLE USING SAID MOLDING DEVICE, AND PRESS MOLDED ARTICLE

Title:

PRESS MOLDING DEVICE, PRODUCTION METHOD FOR PRESS MOLDED ARTICLE USING SAID MOLDING DEVICE, AND PRESS MOLDED ARTICLE

Document Type and Number:

WIPO Patent Application WO/2015/083367

Kind Code:

A1

Abstract:

A press molding device (20) for producing a press molded article (10) having a hat-shaped cross section and having an external shape curved in an L shape along the longitudinal direction in the planar view. The press molding device (20) comprises: a punch (31); a first blank holder (32); a second blank holder (33); a leading section (54); a second die (53); and a pad (41). When pushing the punch (31) into a die (50) and molding a metal plate (70) into the press molded article (10), a first guiding surface (50c) of the leading section (54) precedes a second guiding surface (50d) of the second die (53), then sliding of the first blank holder (32) and the leading section (54) relative to the punch (31) is restricted, pushing of the punch (31) into the die is continued in this restricted state, and the press molded article (10) is molded. As a result, a press molded article (10) having reduced cracks and wrinkles can be obtained.

Inventors:

NISHIMURA RYUICHI (JP)
NAKAZAWA YOSHIAKI (JP)
OTSUKA KENICHIRO (JP)
YONEBAYASHI TORU (JP)
HARADA RYUICHI (JP)
HASHIMOTO KOJI (JP)

Application Number:

PCT/JP2014/006004

Publication Date:

June 11, 2015

Filing Date:

December 02, 2014

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21D24/00; B21D22/26; B21D24/12

Domestic Patent References:

WO2013094705A1	2013-06-27
WO2014106932A1	2014-07-10
WO2011145679A1	2011-11-24

Foreign References:

JPS6466024A	1989-03-13
JPS60103518U	1985-07-15
DE19853130A1	2000-05-31
JP2009255116A	2009-11-05

Other References: