Methods and apparatus for expansion reforming the bottom profile

Details Methods and apparatus for expansion reforming the bottom profile Methods and apparatus for expansion reforming the bottom profile

1992-11-10

1994-10-18

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

723794, 72393, B21D 5126

Patent

active

053557093

ABSTRACT:
Methods and apparatus for reforming drawn and ironed containers are disclosed. The invention permits improvements in bottom profiles by radially expanding arcuate segments against the inner leg that connects the bottom rim of the container to the center panel. The reforming introduced by the present invention permits containers to be constructed of a lighter gauge material without suffering from any loss in strength. The container being reformed is seated on a flat surface and a radially expanding die is used in conjunction with a tapered mandrel to reform the bottom profile. Most preferably, the reforming tool of the present invention is incorporated into a container necking mechanism.

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