Metal deforming – Process – Tube making or reshaping
Patent
1982-02-08
1984-05-08
Crane, Daniel C.
Metal deforming
Process
Tube making or reshaping
72348, 72354, 413 69, B21B 1702
Patent
active
044467141
ABSTRACT:
Methods of necking-in and flanging tubular can bodies having body walls of constant thickness. A pilot die initially inserted into the tubular can body reverses its direction during the necking-in operation with respect to the motion of a ring die member that contacts the exterior surface of the tubular can body member. This concurrent reverse movement of the two forming dies eliminates wrinkles in the necked-in region and produces a container body with increased columnar strength. Repetitive use of the method produces containers with two or three necked-in portions. A method is also disclosed for relubricating the necked-in area of the tubular can body between the successive necking stations.
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Crane Daniel C.
Jones David B.
Matthews Richard P.
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