B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/70, 113/78
B21D 22/28 (2006.01) B21C 3/02 (2006.01) B21D 22/20 (2006.01) B21D 22/30 (2006.01)
Patent
CA 2032144
METHOD AND APPARATUS FOR FORMING WALL IRONED ARTICLES ABSTRACT A wall ironing ring (8, 11, 14) for use in cooperation with a punch (1) to reduce the thickness of a sidewall of a cup (17) drawn from a laminate of a polyester film and sheet aluminium or sheet aluminium alloy has a frusto conical entry surface (24) to the ring which converges at an angle between 1° and 4° to a central axis perpendicular to the plane of the ring and terminates at a land of short length, measured at said axis; and divergent exit surface extends from said land at an angle in the range from 5° to 15°. The ironing ring may be made from a material having a thermal conductivity greater than 50 W/m°C used in cooperation with a like ring of smaller land diameter held apart from the first ring by a spacer (7) in which coolant is applied to the cup.
Ambrose Kevin Mark
Digby Stephen John
Heyes Peter John
Mistry Pravin
Williams Steven Paul
Carnaudmetalbox Plc
Finlayson & Singlehurst
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