| 摘要 |
<p>A screw element includes an outer radius R<SUB>a </SUB>and a core radius R<SUB>i </SUB>for multiscrew extruders with co-rotating and intermeshing screw shafts. The screw element has in axial cross section through its longitudinal axis a profile which has at each of the two axial end faces (i.e. a front end face and a rear end face) only one screw flight 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 and conversely, in a corresponding way, the width (flight land angle phi) of the screw flight are formed in a special way and a shearing flight with a constant shearing flight radius R<SUB>s</SUB>, which is greater than R<SUB>i</SUB>, and less than R<SUB>a</SUB>, is provided.</p> |
