Method of forming a contoured container

Details Method of forming a contoured container Method of forming a contoured container

1995-06-05

1997-04-22

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With metal deformation of different type

72105, 723794, B21D 5126

Patent

active

056220707

ABSTRACT:
A method of forming a drawn and redrawn and ironed container having a contoured sidewall. A cup is blanked and formed from stock in conventional fashion. A profiled bottom may be formed in the cup during the redraw step. The cup is ironed using at least one ironing ring and an ironing punch having at least one recessed area for shaping the interior sidewall of the cup. When the cup is ironed, areas of extra material are formed on the interior of the sidewall where the recessed areas of the ironing punch were present. These areas of extra material are shaped during a spin forming step that creates the contoured sidewall of the can.

REFERENCES:
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patent: 4020670 (1977-05-01), Bulso, Jr. et al.
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patent: 4512172 (1985-04-01), Abbott et al.
patent: 4522049 (1985-06-01), Clowes
patent: 4732031 (1988-03-01), Bulso, Jr. et al.

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