Process for controlling a changeover and throttle element

摘要

During start-up and during colour change in a cold-feeding extruder system, the flow of the plasticated material in the conveying barrel (11) of the extruder (10) is to have the same properties as during production operation. A critical physical parameter in the conveying barrel (11) is held constant at the production level by means of a control (30) which operates the changeover and throttle element (1). Cold-feeding extruder. <IMAGE>