Metal deforming – By use of closed-die and coacting work-forcer – With stripping or ejecting from tool
Patent
1980-08-26
1982-08-31
Gilden, Leon
Metal deforming
By use of closed-die and coacting work-forcer
With stripping or ejecting from tool
72349, B21D 4500
Patent
active
043465803
ABSTRACT:
Improved ironing material and structure for drawing and ironing can bodies from lightweight flat rolled sheet metal while facilitating stripping from the ironing mandrel and providing desired flanging metal are disclosed. The exterior surface of the mandrel is provided with a uniform-taper transition zone contiguous to the trim height for a can body being formed such that sidewall metal thickness increases uniformly above the main body portion of the can body and expires along the tapered surface of the transition zone. The tapered surface extends beyond formed can body height so that stripping means approach the open end of an ironed can body along a portion of the mandrel having a smaller diameter than the interior diameter of the mandrel mounted can body.
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patent: 3406554 (1968-10-01), Frankenberg
patent: 3733880 (1973-05-01), Hansson
patent: 3855862 (1974-12-01), Moller
patent: 3937046 (1976-02-01), Saunders
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patent: 3972217 (1976-08-01), Misonoo
patent: 3990289 (1976-11-01), Widmann
patent: 4095452 (1978-06-01), Cruz
patent: 4193279 (1980-03-01), Maeder
Gilden Leon
National Steel Corporation
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