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AssigneeMitsubishi Materials Corporation
InventorsTatsuya Hanafusa, Masahiro Hosoi, Aki Ikeda
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A manufacturing apparatus for manufacturing a can having a can body including a dome section and an annular projection. The dome section is formed on a bottom of the can and is recessed inwardly of the can body. The annular projection is formed around a peripheral edge of the dome section so as to project outwardly in a direction of an axis of the can. A plurality of inner recesses are formed on an inner wall of the annular projection. The apparatus includes: an apparatus main body; a mandrel disposed on the apparatus main body for supporting the can body; a can bottom processing unit disposed on the apparatus main body so as to be relatively movable in the direction of the can axis with respect to the can bottom. The can bottom processing unit includes: a plurality of punch pawls having extreme ends which are disposed in a circumferential direction, which are movable in a radial direction, and which project toward the mandrel; a punch pawl expanding member which moves the extreme ends outwardly in the radial direction; and a dome support member which abuts the dome section from the inside of the punch pawls in the radial direction and supports the dome section. The apparatus produces a can having a reduced can bottom thickness, but still has a sufficient can strength without deformation of the can bottom and in which the phenomenon of bottom growth is suppressed.
A can manufacturing apparatus for forming a can having a can body including a dome section and an annular projection, wherein said dome section is formed on a bottom of said can and is recessed inwardly, wherein said annular projection is formed around the peripheral edge of the dome section and projects outwardly in a direction of an central longitudinal axis of said can, and wherein a plurality of inner recesses are formed on an inner peripheral wall of said annular projection in a circumferential direction and are formed inwardly, said apparatus comprising:
A can manufacturing method for manufacturing a can having a can body including a dome section and an annular projection, wherein said dome section is formed on a bottom of said can and is recessed inwardly of said can body, and wherein said annular projection is formed around a peripheral edge of said dome section so as to project outwardly in a direction of a central longitudinal axis of said can, said method comprising the steps of:
Dependencies are inferred from the claim text.