Vent extruders made by Rubicon have been designed and developed to produce sections free from pores and flexible hoses. Here, highly volatile components are removed from the rubber compound during the extrusion process. This occurs through a purposefully designed screw and a vented barrel to which a vacuum pump is connected.

Low pulsation and high pressure build-up are the outstanding features of these extruders. These machines are preferably used upstream of continuous pressureless vulcanization lines.