公开(公告)号：US20250010353A1

公开(公告)日：2025-01-09

申请号：US18891130

申请日：2024-09-20

Applicant: Toyo Seikan Co., Ltd.

Inventor： Kazuhiko Tsukada ,  Kei Oohori ,  Tatsuya Osafune ,  Yousuke Ogawa ,  Takanori Nakagawa ,  Ryuji Onuki ,  Ryosuke Hanada

IPC: B21D51/26 ,  H01M50/103

Abstract: A square can manufacturing method and a square can manufacturing apparatus that suppress the occurrence of nonuniformity in thickness of a long side wall without increasing the manufacturing cost are provided. The square can manufacturing method includes drawing and ironing at a planned cylindrical part of an intermediate molded product. In the square can manufacturing method, a die and a punch are formed such that in a state where the punch is inserted into a die machining through hole in an unloaded state, a distance in a short side direction between a center portion of a punch long side wall machining part in a long side direction and a die long side wall machining part is smaller than a distance in the short side direction between both end portions of the punch long side wall machining part in the long side direction and the die long side wall machining part.

公开(公告)号：US20250010352A1

公开(公告)日：2025-01-09

申请号：US18890192

申请日：2024-09-19

Applicant: Toyo Seikan Co., Ltd.

Inventor： Kazuhiko Tsukada ,  Kei Oohori ,  Tatsuya Osafune ,  Yousuke Ogawa ,  Takanori Nakagawa ,  Ryuji Onuki ,  Ryosuke Hanada

IPC: B21D51/26 ,  H01M50/103

Abstract: Provided are a square can manufacturing method and a square can manufacturing apparatus. The square can manufacturing method includes a shape correction step of correcting the shape of an intermediate molded product, and in the shape correction step, a distance in a short side direction between planned long side wall parts of the intermediate molded product is expanded by pushing the planned long side wall parts outward in the short side direction by a long side wall pressing part of a shape correction punch inserted in the intermediate molded product, and a planned bottom wall part of the intermediate molded product is planarized by sandwiching the planned bottom wall part between a bottom wall pressing part of the shape correction punch inserted in the intermediate molded product and a bottom wall pressing member disposed on an outer surface side of the planned bottom wall part.