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Press Molded Article Manufacturing Method And Press Molding Device

Abstract: A method for manufacturing a press-molded article (300, 400) comprises: sandwiching a blank (200) between a die (20, 20B) and a blank holder (30, 30A-30F); and using a punch (10, 10B) to push in the blank (200) in a pressing direction (Z). When viewed from the pressing direction (Z), a rim (24) of the die (20, 20B) on the punch (10, 10B) side thereof includes a curved section (241) that is curved convexly on the punch (10, 10B) side and that extends with a radius of curvature less than 400 mm. When viewed from the pressing direction (Z), a space (C) between a rim (34) of the blank holder (30, 30A-30F) on the punch (10, 10B) side thereof and the rim (24) of the die (20, 20B) on the punch (10, 10B) side thereof varies along the rim (24) of the die (20, 20B), said space being on a perpendicular line in the direction of extension of the rim (24) of the die (20, 20B), When viewed from the pressing direction (Z), the spacing (C) is smallest at the curved section (241).

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
18 March 2025
Publication Number
13/2025
Publication Type
INA
Invention Field
MECHANICAL ENGINEERING
Status
Email
Parent Application

Applicants

NIPPON STEEL CORPORATION
6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Inventors

1. URUSHIBATA, Ryo
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
2. ITO, Yasuhiro
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

# Name Date
1 202517024095-STATEMENT OF UNDERTAKING (FORM 3) [18-03-2025(online)].pdf 2025-03-18
2 202517024095-REQUEST FOR EXAMINATION (FORM-18) [18-03-2025(online)].pdf 2025-03-18
3 202517024095-PROOF OF RIGHT [18-03-2025(online)].pdf 2025-03-18
4 202517024095-POWER OF AUTHORITY [18-03-2025(online)].pdf 2025-03-18
5 202517024095-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [18-03-2025(online)].pdf 2025-03-18
6 202517024095-FORM 18 [18-03-2025(online)].pdf 2025-03-18
7 202517024095-FORM 1 [18-03-2025(online)].pdf 2025-03-18
8 202517024095-FIGURE OF ABSTRACT [18-03-2025(online)].pdf 2025-03-18
9 202517024095-DRAWINGS [18-03-2025(online)].pdf 2025-03-18
10 202517024095-DECLARATION OF INVENTORSHIP (FORM 5) [18-03-2025(online)].pdf 2025-03-18
11 202517024095-COMPLETE SPECIFICATION [18-03-2025(online)].pdf 2025-03-18
12 202517024095-FORM 3 [01-09-2025(online)].pdf 2025-09-01