| abstract |
The extruder screw (11) is comprised of a screw shaft (12) and of a number of screw elements (16a, 16b, 16c) that can be releasably attached thereto or are attached thereto. To this end, the screw shaft has an external toothing (16) and the screw elements have an internal toothing (22a, 22b, 22c) that meshes therewith, the tooth profile of the teeth (28, 33) of the external and internal toothing being asymmetrical. With regard to a preferred rotating direction (R) of the extruder screw (11), the torque-transmitting tooth flanks (29, 34) of the teeth of the external and internal toothing are at a smaller angle to the normal (N) to the axis of rotation (A) than the respectively opposite tooth flanks (30, 35) of the external and internal toothing. The invention also relates to an extruder and to a shaft-hub connection. |