Process for the extrusion of rubber compounds and plastics and gear extruders

摘要

The invention concerns a process for extrusion of rubber mixtures and plastics and a gear extruder in which the gear extruder has a housing in which a pair of combining gears and two insertion rollers are housed and which is equipped with two insertion channels and an extrusion channel. It is the task of the invention to improve the material intake by simple means and in a simple way and to better fill the gaps with material to be extruded, thereby reducing the drag of air locks. The invention consists of:that, as far as possible, the goods to be processed are to be made by means of insertion rollers arranged in a place where the teeth of the gears with the inside wall of the housing form an insertion column, Enter into the tooth cavities of the gears and thereby expel at least part of the air contained in the tooth cavities. To carry out this procedure, one can use the inventive gear extruder, which is characterized by the fact that each gear is directly attached to an intake roller, and that the inlet rollers are positioned in a single location in enclosure designs,where the teeth of the gears with the inside wall of the housing form an inlet column. In this way, it is possible to fill the gaps of the teeth more perfectly with material to be extruded and to avoid the drag of air to a large extent.