Toyo Seikan Kaisha, Ltd.

Toyo Seikan Co., Ltd.

Mitsuhiko Aoyagi

Hidekazu Tomaru

Norihito Saiki

Kiyosumi Manita

A can 1 is provided with a mouth part (4), a shoulder part (3), and a body part (2). The shoulder part (3) of the can (1) is decorated, without damaging the shoulder part (3), by forming at least one of a recess and a protrusion by a rotating process in which the shoulder part (3) is held between a receiver (11a), having a concave-convex shape, of an inner roll (11) and an outer roll (12) having a convex-concave shape corresponding to the concave-convex shape of the receiver (11) of the inner roll (11).

Can manufacturing method, can manufacturing device, can, and can manufacturing tool set

A method and a device for manufacturing a synthetic resin coated metal can body capable of drawing and ironing the synthetic resin coated metal can body with a large processing quantity without causing can body breakage. First and second ironings are conducted to the side wall of a redrawn can () formed by drawing a thermoplastic resin-coated aluminum sheet () on both surfaces by a first ironing die () and a second ironing die () in that order according to the pressing-in of a punch () with such processing quantities that sheet thickness reduction ratios from an original sheet thickness come within the rages of 35 to 55% and 60 to 75% respectively for manufacturing a metal can body. Since the coated layer of a thermoplastic resin acts on a metal body in a direction for preventing the metal body from being broken (ruptured), processing conditions for ironing are relieved, and even if an ironing with a high sheet thickness reduction ratio is performed, an ironing capable of maintaining quality is allowed without causing the can body breakage in a first step can () and a second step can ().

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Yokohama, Japan

Mitsuhiko Aoyagi