Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1995-05-31
1999-01-12
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72344, 72427, B21D 2200, B21D 4500
Patent
active
058573755
ABSTRACT:
Can ends are ejected from a tool station by a lifter ring and air currents in an ejector chute provided by a curved nozzle assembly adjacent an opening in the lower edge of the chute. It entrains can ends in air current across the die station and over a knife edge in the lower opening of the chute. The lower wall of the chute is positioned on top of the blanking die during the can end entrainment. The punch assembly moves down through the lower opening and through a larger opening in the chute. After can end clears the tooling and continues down the chute with air streams that are augmented by nozzles in the upper wall, the chute is lifted. Double-acting cylinder actuators lift the chute. Side walls of the chute taper inwardly to align the can ends for precise release from the discharge end. Sensor emitters sense passage of the can ends. Solenoid valves control application of fluid pressure to opposite ends of the actuator cylinders. A solenoid valve controls a booster current air blast for starting can covers along the chute. Lifting and lowering the chute a stall amount provides rapid and accurate indexing and stepping of the sheet material to the die stations. The chutes being in sections allows for their side by side aligning over the tooling stations and quick removal of the assembly. Lifting and lowering of the chutes/stripper combination by means other than press slide allows independent timing from the press. Lowering the chute/stripper combination allows can ends to eject from the top of the lower die surface unobstructed by the stripper.
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Nelson Donald
Ruby Gary V.
Butler Rodney
Creighton Wray James
Larson Lowell A.
M. S. Willett, Inc.
Narasimhan Meera P.
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