VISCOELASTIC FLUID FLOW FEATURES IN THE DISK-SHAPED GAP EXTRUDER
Disk-shaped gap extruders have higher plasticizing and homogenizing power than screw extruders, but the forming pressure which they develop is lower. Therefore, they are mainly used as mixers or granulators for loading the prep- aration material into the screw extruder. The operation principle of d...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Igor Sikorsky Kyiv Polytechnic Institute
2013-10-01
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| Series: | Вісник Національного технічного університету України «Київський політехнічний інститут імені Ігоря Сікорського»: Серія «Хімічна інженерія, екологія та ресурсозбереження» |
| Subjects: | |
| Online Access: | http://chemengine.kpi.ua/article/view/55742 |
| Summary: | Disk-shaped gap extruders have higher plasticizing and homogenizing power than screw extruders, but the forming
pressure which they develop is lower. Therefore, they are mainly used as mixers or granulators for loading the prep-
aration material into the screw extruder. The operation principle of disk-shaped extruder based on the use of emerg-
ing into a viscoelastic material the stress normal to the shear rate.
This article conducted numerous experiments which allow us to estimate qualitatively and quantitatively the
Weissenberg effect that occurs when the flow of polymer melts is viscoelastic. The viscoelastic fluid flow in
axisymmetrical channel disk-shaped extruder is research. Numerical experiments have allowed calculating the ex-
trusion technological parameters of viscoelastic liquid at a high Weissenberg number more accurately.
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| ISSN: | 2617-9741 2664-1763 |