Characteristics:

The screws for vented rubber extruder can be devided into the feeding zone,the plasticizing zone,the venting zone and the extrusion zone. The flute spiral of the venting zone is both deep and has a large lead, so that its volume grows significantly. The gas in the rubber material gradually developes into bubbles and after the rubber material enters this zone, the bubbles are cut to pieces by the screw edges and the gas is extracted by the vacuum pump from the vent. The rubber material after venting treatment heads for the extrusion zone for further plasticizing and mixing. This design improves the compactness and the presentation quality remarkably. The venting rubber screw is mainly used in the production of continuous vulcanized rubber under ordinary pressure, such as the rubber coating of wires and cables, the shaping extrusion of rubber tubes, inner tubers, non-conventional type rubber sealing strips,etc.