Casting machine control

Details Casting machine control Casting machine control

B - Operations, Transporting

22

D

341/108.1

B22D 11/06 (2006.01) B22D 11/20 (2006.01)

Patent

CA 1329247

-22- CASTING MACHINE CONTROL Abstract A dual drive sheet casting machine for casting metal sheet has a pair of water cooled rolls between which the metal is cast. Each roll of the casting machine is driven by a separate motor, with one motor being a master and the other a slave driven at a controlled percentage of the speed or current of the master motor. Differential current to the two motors indicates sticking or microsticking of metal to the rolls. When the magnitude of the differential current exceeds a high limit indicating sticking, the master roll is slowed to eliminate the sticking. When the magnitude of differential current passed by a band pass filter between one half and ten Hertz exceeds a selected maximum indicating microsticking, the rotational speed of the master roll is decreased. After making a change in roll speed, the control circuit is disabled for an interval to permit the casting machine to regain stability.

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