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Title:
MOLDING MATERIAL PRODUCTION METHOD AND MOLDING MATERIAL THEREOF
Document Type and Number:
WIPO Patent Application WO/2017/145856
Kind Code:
A1
Abstract:
In the present invention, in producing a molding material by a molding process including at least one squeezing process, and at least one drawing process performed after said squeezing process, the width of a punch 31 used for the squeezing process is made wider at a rear end side than the width at a leading end side, and by pushing a material metal plate 2 along with the punch 31 into a push-in hole 30a, an ironing process is performed on a region corresponding to a flange section of the material metal plate. At such time, a material metal plate comprising a metal having a body-centered cubic structure is used, and the flange diameter reduction rate obtained from the flange diameter after the drawing process and the diameter of the material metal plate is set to be 0.42 or less.

Inventors:
NAKAMURA, Naofumi (4-1 Marunouchi 3-chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
YAMAMOTO, Yudai (4-1 Marunouchi 3-chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
Application Number:
JP2017/005242
Publication Date:
August 31, 2017
Filing Date:
February 14, 2017
Export Citation:
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Assignee:
NISSHIN STEEL CO., LTD. (4-1 Marunouchi 3-chome, Chiyoda-ku Tokyo, 66, 〒1008366, JP)
International Classes:
B21D22/28; B21D22/26; B21D51/18
Attorney, Agent or Firm:
SOGA, Michiharu et al. (S. Soga & Co, 8th Floor Kokusai Building, 1-1, Marunouchi 3-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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