| 摘要 |
PURPOSE:To operate a crusher group in an optimum state by deciding on the number of crushers and positions of scrapers corresponding to the amount of transport by a signal from a measuring instrument provided at a preceding stage. CONSTITUTION:The feeding amount of raw material products from a mixing tank is grasped by a measuring instrument 7 provided to a conveyor. The priority level of a selected crusher is selected with priority selection switches 57A- 57D. Then, deciding circuits 61A-61C in a decision control circuit 59 determine the optimum number of crushers and selection signals 51A-51D for scrapers are outputted from decision results of command deciding circuits 63A-63D, 64A-64D, 65A-65D and 66A-66D for scrapers on the basis of signals from the circuits 61A-61C. Consequently, when the amount of transport decreases greatly to change the decision contents of the circuits 61A-61C, the crusher with the lowest priority is stopped, and when the amount increases, on the other hand, a new crusher is operated. |
