Displacement and deformation of material in the feed zone of single-screw extruders

Polimery ◽  
1988 ◽  
Vol 33 (07/08) ◽  
pp. 254-256
Author(s):  
JAROSLAW DIAKUN
Keyword(s):  
Single Screw ◽  
Feed Zone ◽  
Single Screw Extruders ◽  
Screw Extruders

scholarly journals Enhanced Processing of Regrind as Recycling Material in Single-Screw Extruders

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1540
Author(s):  
Philipp Thieleke ◽  
Christian Bonten
Keyword(s):  
Process Window ◽  
Experimental Investigations ◽  
The Novel ◽  
Virgin Material ◽  
Compression Tests ◽  
Melt Temperature ◽  
Single Screw ◽  
Feed Zone ◽  
Single Screw Extruders ◽  
Screw Extruders

Regrind processing poses challenges for single-screw extruders due to the irregularly shaped particles. For grooved feed zones, the output is lessened by the reduction of bulk density in comparison to virgin material. Simultaneously, the melt temperature increases, reducing the extruder’s process window. Through experimental investigations on a test stand, a novel feed zone geometry (nominal diameter 35 mm) is developed. It aligns the regrind’s specific throughput with that of virgin material. The regrind processing window is essentially increased. As the solids conveying in the novel feed zone cannot be simulated with existing methods, numerical simulations using the discrete element method are performed. Since plastic deformation occurs in the novel feed zone geometry, a new hysteresis contact model is developed. In addition to spheres, the regrind and virgin particles are modeled as superquadrics to better approximate the irregular shape. The new contact model’s simulation results show excellent agreement with experimental compression tests. The throughput of the extruder simulations is considerably underestimated when using spheres to represent the real particles than when using irregularly shaped superquadrics. Corresponding advantages can be seen especially for virgin material.

Analyzing the Influence of Surface Renewal on Diffusive Mass Transport in Vented Single-Screw Extruders

2017 ◽  
Vol 32 (3) ◽  
pp. 387-393 ◽  
Author(s):  
C. Marschik ◽  
B. Löw-Baselli ◽  
Jürgen Miethlinger
Keyword(s):  
Mass Transport ◽  
Surface Renewal ◽  
Single Screw ◽  
Single Screw Extruders ◽  
Screw Extruders

Analyzing and Troubleshooting Single-Screw Extruders

2020 ◽  
pp. I-XIX
Author(s):  
Gregory A. Campbell ◽  
Mark A. Spalding
Keyword(s):  
Single Screw ◽  
Single Screw Extruders ◽  
Screw Extruders

New range of single-screw extruders for PO pipes

2021 ◽  
Vol 65 (2) ◽  
pp. 62
Keyword(s):  
Single Screw ◽  
Single Screw Extruders ◽  
Screw Extruders

A heuristic method for modeling three-dimensional non-Newtonian flows of polymer melts in single-screw extruders

2017 ◽  
Vol 248 ◽  
pp. 27-39 ◽  
Author(s):  
Christian Marschik ◽  
Wolfgang Roland ◽  
Bernhard Löw-Baselli ◽  
Jürgen Miethlinger
Keyword(s):  
Polymer Melts ◽  
Heuristic Method ◽  
Three Dimensional ◽  
Single Screw ◽  
Newtonian Flows ◽  
Single Screw Extruders ◽  
Screw Extruders

Compounding with single-screw extruders

1997 ◽  
Vol 16 (4) ◽  
pp. 251-262 ◽  
Author(s):  
Martin Gale
Keyword(s):  
Single Screw ◽  
Single Screw Extruders ◽  
Screw Extruders

Dependence of solids conveying on screw axial vibration in single screw extruders

2006 ◽  
Vol 102 (3) ◽  
pp. 2998-3007 ◽  
Author(s):  
Qu Jinping ◽  
Shi Baoshan ◽  
Feng Yanhong ◽  
He Hezhi
Keyword(s):  
Axial Vibration ◽  
Single Screw ◽  
Single Screw Extruders ◽  
Screw Extruders

Single-Screw Extruders

1983 ◽  
pp. 1-6 ◽  
Author(s):  
Fabrizio G. Martelli
Keyword(s):  
Single Screw ◽  
Single Screw Extruders ◽  
Screw Extruders
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