MULTI-STAGE PRESS-MOLDING METHOD FOR SHEET MATERIAL, AND MOLD DEVICE FOR MOLDING SHEET MATERIAL

WIPO Patent Application WO/2024/025040

A1

The present invention relates to a method and a device for molding a sheet material into a hat type which protrudes a predetermined height from a floor surface and which has a flat surface on the top thereof, and the method may comprise the steps of: (S1) molding a sheet material into the shape a protrusion having a curved surface at the top thereof, so that the sheet material has a uniform thickness reduction ratio; (S2) forming both end edge parts by moving, left and right, the sheet material in the center thereof so that the protrusion has a flat surface; and (S3) forming the flat surface by correcting the protruding portions of both the end edge parts such that same become flat.

WO/2023/110152	A DIE PAIR FOR MANUFACTURING A 3D-SHAPED PLATE BY PRESS FORMING, A DIE OF THE DIE PAIR AND A PRESS-FORMING METHOD USING THE DIE PAIR
JP2002113525	METAL COVER, ITS MANUFACTURING METHOD AND PRESS DIE USED THEREFOR
JPS555191	METHOD AND DEVICE FOR INCREASING DENSITY OF FINS OF HEAT EXCHANGER

JUNG YOUNG JU (KR)
KIM KI JOUNG (KR)
JIN BYEONG KEUK (KR)
HYUN JOO SIK (KR)

PCT/KR2022/017376

February 01, 2024

November 07, 2022

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HYUNDAI STEEL CO (KR)

B21D13/02; B21D11/08; H01M8/0206

JP2006120497A	2006-05-11
KR20170003668A	2017-01-09
JP2001087820A	2001-04-03
JP2001321838A	2001-11-20
JP2012051016A	2012-03-15

YOON & YANG(IP)LLC (KR)

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