METHOD OF MANUFACTURING BOTTOMED CONTAINER, AND PRESS SYSTEM

Abstract: to suppress warping at a bottom of a workpiece when manufacturing a bottomed box-section cylindrical container by molding a workpiece from a flat plate state to a box-section cylindrical shape state having a bottom by performing multiple press-drawing steps by using multiple molds each having a long-hole-shaped shaping hole. a first press-drawing step is performed using a first mold having a first shaping hole having a long hole shape. a second press-drawing step is performed using a second mold having a second shaping hole having a long hole shape, and is configured as a next press-drawing step after the first press-drawing step. the first shaping hole is formed with a larger dimension in a width direction perpendicular to a longitudinal direction than the second shaping hole, and is formed tapering inward in the width direction from both end sides to the center side in the longitudinal direction.

Inventor(s): TOSHIHIRO ODAGAKI

CPC Classification: B21D22/28 (WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire ))

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