Double or multi extruder screw, has axial tensioned screw elements arranged on support and connected with one another in torque proof manner via axial front toothing, where support is designed as tension rod

摘要

The screw (1) has axial tensioned screw elements (5) arranged on a support (2) and connected with one another in a torque proof manner via an axial front toothing (10) and another axial front toothing. The support is designed as a tension rod (3), at which the screw elements are supported in a pre-stressed manner via a screw point (4) and a tightening screw. A coupling element (6) is attached to the rod for connecting the screw with a drive shaft. A seal (28) i.e. ring seal, acting at the screw point is made of plastic or metal.