Studies on positive conveying in helically channeled single screw extruders
A solids conveying theory called double-flight driving theory was proposed for helically channeled single screw extruders. In the extruder, screw channel rotates against static barrel channel, which behaves as cooperative embedded twin-screws for the positive conveying. They turn as two parallel arc...
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Budapest University of Technology
2012-07-01
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Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0003162&mi=cd |
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doaj-2f3102816d714186b8b3f7ae4e217d6e2020-11-24T22:39:12ZengBudapest University of Technology eXPRESS Polymer Letters1788-618X2012-07-016754356010.3144/expresspolymlett.2012.58Studies on positive conveying in helically channeled single screw extrudersL. PanM. Y. JiaZ. M. JinK. J. WangP. XueA solids conveying theory called double-flight driving theory was proposed for helically channeled single screw extruders. In the extruder, screw channel rotates against static barrel channel, which behaves as cooperative embedded twin-screws for the positive conveying. They turn as two parallel arc plates, between which an arc-plate solid-plug was assumed. By analyzing the forces on the solid-plug in the barrel channel and screw channel, the boundary conditions when the solid-plug is waived of being cut off on barrel wall, were found to have the capacity of the positive conveying. Experimental data were obtained using a specially designed extruder with a helically channeled barrel in the feeding zone and a pressure-adjustable die. The effects of the barrel channel geometry and friction coefficients on the conveying mechanism were presented and compared with the experimental results. The simulations showed that the positive conveying could be achieved after optimizing extruder designs. Compared with the traditional design with the friction-drag conveying, the throughput is higher while screw torque and energy consumption are decreased. Besides, the design criteria of the barrel channel were also discussed.http://www.expresspolymlett.com/letolt.php?file=EPL-0003162&mi=cdProcessing technologiesPlastics moldingScrew extrusion |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
L. Pan M. Y. Jia Z. M. Jin K. J. Wang P. Xue |
spellingShingle |
L. Pan M. Y. Jia Z. M. Jin K. J. Wang P. Xue Studies on positive conveying in helically channeled single screw extruders eXPRESS Polymer Letters Processing technologies Plastics molding Screw extrusion |
author_facet |
L. Pan M. Y. Jia Z. M. Jin K. J. Wang P. Xue |
author_sort |
L. Pan |
title |
Studies on positive conveying in helically channeled single screw extruders |
title_short |
Studies on positive conveying in helically channeled single screw extruders |
title_full |
Studies on positive conveying in helically channeled single screw extruders |
title_fullStr |
Studies on positive conveying in helically channeled single screw extruders |
title_full_unstemmed |
Studies on positive conveying in helically channeled single screw extruders |
title_sort |
studies on positive conveying in helically channeled single screw extruders |
publisher |
Budapest University of Technology |
series |
eXPRESS Polymer Letters |
issn |
1788-618X |
publishDate |
2012-07-01 |
description |
A solids conveying theory called double-flight driving theory was proposed for helically channeled single screw extruders. In the extruder, screw channel rotates against static barrel channel, which behaves as cooperative embedded twin-screws for the positive conveying. They turn as two parallel arc plates, between which an arc-plate solid-plug was assumed. By analyzing the forces on the solid-plug in the barrel channel and screw channel, the boundary conditions when the solid-plug is waived of being cut off on barrel wall, were found to have the capacity of the positive conveying. Experimental data were obtained using a specially designed extruder with a helically channeled barrel in the feeding zone and a pressure-adjustable die. The effects of the barrel channel geometry and friction coefficients on the conveying mechanism were presented and compared with the experimental results. The simulations showed that the positive conveying could be achieved after optimizing extruder designs. Compared with the traditional design with the friction-drag conveying, the throughput is higher while screw torque and energy consumption are decreased. Besides, the design criteria of the barrel channel were also discussed. |
topic |
Processing technologies Plastics molding Screw extrusion |
url |
http://www.expresspolymlett.com/letolt.php?file=EPL-0003162&mi=cd |
work_keys_str_mv |
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