Design of two-stage extractor screws

A basis for design of two‐stage extractor screws is developed with special focus on determining optimum design of the final pumping section in order to maximize pressure‐generating capability. Departure from the conventional square‐pitch helix angle of 17.7° appears justified in this section of the...

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Veröffentlicht in:Polymer engineering and science 1983-04, Vol.23 (6), p.299-305
1. Verfasser: Squires, P. H.
Format: Artikel
Sprache:eng
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Zusammenfassung:A basis for design of two‐stage extractor screws is developed with special focus on determining optimum design of the final pumping section in order to maximize pressure‐generating capability. Departure from the conventional square‐pitch helix angle of 17.7° appears justified in this section of the screw where pressure‐development capability is critical to successful performance. Optimization can produce gains of 5 to 30 percent in pressure (or in corresponding length reductions), the exact benefits depending on the non‐Newtonian behavior of the melt and on the optimization strategy selected.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.760230603