Plastic producing machine, especially and extruder, is operated using worm rotational speed control

摘要

A process for operating a machine for producing plastic material , especially an extruder, comprises driving the machine by using a rotational speed control. The worm is rotated at more than 600 rpm. The speed is chosen so a vacuum is formed in the transition region between the filling funnel and the worm inlet. The specific material entry is greater than the theoretical value at 0 rpm.