| 摘要 |
The invention relates to a screw element with an outer radius Ra and a core radius Ri for multiscrew extruders with co-rotating and intermeshing screw shafts, in particular for twin-screw extruders, which has in axial cross section through its longitudinal axis (10) a profile which has at each of the two axial end faces (front end face 8, rear end face 8') only a screw flight (1, 1') corresponding to a conventional single-start screw element for intermeshing screw shafts. In this case, the width (flight land angle phi) of the screw flight (1) and conversely, in a corresponding way, the width (flight land angle phi) of the screw flight (1') are formed in a special way and a shearing flight (7) with a constant shearing flight radius Rs, which is greater than Ri and less than Ra, is provided.
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