| Autor: |
Luger, Hans-Jürgen, Miethlinger, Jürgen |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 3158 Issue 1, p1-6, 6p |
| Abstrakt: |
The aim of the present work is to study the extrusion performance of double wave screws and present a modeling approach based on network analysis for calculating the pressure-/throughput behavior. Wave and energy-transfer screws exhibit wave-like channel depth profiles (valley/crest sequences and flight undercuts) with the purpose of inducing solid bed break-up, dispersion of solid agglomerates and enhancing dispersive and distributive mixing by creating extensional and wedge flows. Experiments were performed on a well-instrumented 35/34D and 60/33D single-screw extruder with barrier and wave screws, varying materials, and screw speeds. The replacement of the barrier zone with a combination of a compression and a double wave zone resulted in a considerable performance improvement. Furthermore, a simulation routine based on network analysis is presented to calculate the non-isothermal melt dominant pressure-/throughput behavior of wave and energy-transfer zones. In combination with recently developed melt conveying and dissipation models the simulation results are in excellent accordance with the experimental results. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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