Metal deforming – By use of roller or roller-like tool-element – With work-forcer offset from – and relatively movable...
Patent
1975-04-28
1976-10-05
Larson, Lowell A.
Metal deforming
By use of roller or roller-like tool-element
With work-forcer offset from, and relatively movable...
72224, 72347, B21B 1706, B21D 2400
Patent
active
039837335
ABSTRACT:
A die for performing the ironing process in the manufacture of drawn and ironed food or beverage cans. A number of rollers are mounted in a carriage to form a ring of suitable inner diameter to perform the desired amount of reduction in the thickness of a can mounted on a mating punch. Each roller has a concave peripheral surface which forms a small segment of the ring. The rollers have conical end surfaces which butt together closely at the inner diameter. On the outer side of the ring, the rollers bear on backer members. In one form of the invention the backer members are stationary strips and the carriage moves in the same direction as the can when the can passes through the die. In another form the carriage is stationary and the backer strips move in the opposite direction. In another form, the backer members are additional rollers mounted on bearings. In all cases the friction between the rollers and the can and the rollers and the backer members is primarily rolling friction.
This invention relates to the manufacture of food or beverage cans of the type known as seamless or drawn and ironed cans, and pertains more particularly to dies for performing the ironing process.
REFERENCES:
patent: 2145125 (1939-01-01), Moore
patent: 3457759 (1969-07-01), Doerr et al.
patent: 3581539 (1971-06-01), Lauener
patent: 3729970 (1973-05-01), Propach et al.
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