Method for producing a cup-shaped object

Details Method for producing a cup-shaped object Method for producing a cup-shaped object

2004-09-02

2010-02-16

Ross, Dana (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

C413S008000

Reexamination Certificate

active

07661286

ABSTRACT:
A method for the production of a cup-shaped article, in particular a blank of a screw cap for glass bottles or the like, from an enameled metal sheet, using two tools in a stepwise manner: 1) the blank is stamped from the metal sheet in a first tool by the relative motion between a cutting bell cooperating with a blank holder and a drawing block, and the blank is drawn around the drawing block, the width of a flange forming between the cutting bell and the blank holder being continuously reduced with a progressive degree of deformation until the flange reaches a defined width (R-r), and 2) the blank is deformed in a second tool such that the radially outwardly directed flange is deflected toward a profiling introduced in a wall of the blank.

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