Method of forming a metal container body

Details Method of forming a metal container body Method of forming a metal container body

B - Operations, Transporting

21

D

B21D 22/20 (2006.01) B21D 22/22 (2006.01) B21D 22/30 (2006.01)

Patent

CA 2169743

A method of forming a metal container body comprising drawing a metal cup (12) having a sidewall and a base wall with an upwardly projecting boss in the base wall, said boss having a transverse wall (14) and an annular wall portion (15) adjacent the sidewall of the cup (12), and reforming said base wall by rolling the metal in said annular wall (15) upwardly with respect to said transverse wall (14) to form a generally frusto-conical annular wall portion between said transverse wall (14) and said sidewall.

Procédé de formage d'un corps de récipient en métal comprenant l'étirage d'une coupelle métallique (12) possédant une paroi latérale et une paroi de base pourvue d'une bosse formant une saillie vers le haut, ladite bosse possédant une paroi transversale (14) et une paroi annulaire (15) contiguë à la paroi latérale de la coupelle (12), ainsi que le reformage de ladite paroi de base par laminage du métal dans ladite paroi annulaire (15) vers le haut par rapport à ladite paroi transversale (14), de façon à réaliser une paroi annulaire tronconique entre ladite paroi transversale (14) et ladite paroi latérale.

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