Cold drawing a disk into a cap for a paper core

Details Cold drawing a disk into a cap for a paper core Cold drawing a disk into a cap for a paper core

1983-03-28

1986-07-15

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72350, B21D 2200

Patent

active

045998850

ABSTRACT:
Apparatus and process for cold drawing a disk into a cap for a paper core. The process comprises cold drawing a disk to form a cylindrical cup having a rim and a socket, removing the central portion of the cup leaving a flange, straightening the flange and trimming the rim. The resultant cap is characterized by having a uniform-sized rim of a width equal to the width of the socket.
The apparatus comprises a press having a fixed portion and a movable portion, a cylindrical member mounted on the fixed portion, a ram and a number of opposed cylinders carried by the movable portion, and means for moving the movable portion toward the fixed portion.

REFERENCES:
patent: 2075847 (1937-04-01), Hothersall
patent: 3435653 (1969-04-01), Scaletta
patent: 3942354 (1976-03-01), Randolph

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