Method for controlling the feed rollers of a granulating mill for comminuting the scrap plastic film of a thermoforming machine and granulating mill for implementing such method

摘要

Method controls the induction roller speed of a comminuter which granulates the waste grid forming the manufacturing residue from a thermoforming machine. Rotor cutters act against fixed stator cutters, to chop the grid, at first into strips, then into granules. Between thermoformer and comminuter, a loop is formed. In the new method, the size of the loop (30) is sensed. Alteration in its size between one or more cycles, is related by a control system to a variation in the speed of continuous rotation of the induction rollers (26, 27). In this way, the size of the loop (30) is maintained effectively constant. Also claimed is the corresponding comminuter.