PRO-TECH-MA 2017 & SURFACE ENGINEERIG 2017
20 June – 23 June, 2017, Bardejov Spa, hotel Alexander
Committees Papers
Conference Program
ISBN 978-80-553-3181-2
Published by Technical University of Košice, 2017
Editors: Emil Spišák Ľuboš Kaščák Anna Guzanová Ľudmila Dulebová
134 pages, 80 copies
Conference Proceeding
PRO-TECH-MA 2017 – SURFACE ENGINEERING 2017 International Scientific Conference, Bardejov Spa 20.-23.6.2017
67
UNCONVENTIONAL BARREL DESIGNS OF SINGLE- SCREW PLASTICIZING SYSTEMS
Łukasz Majewski
*, Emil Sasimowski
Politechnika Lubelska, Lublin, Poland
*Corresponding author: e-mail: l.majewski@pollub.pl, Tel.: +48 81 538-42-25, Politechnika Lubelska, ul. Nadbystrzycka 38D, 20-618 Lublin, Poland
Keywords: plasticizing system, rotating sleeve of the barrel, barrel construction, NEWEX project
Abstract
Extrusion is one of the most important processes in polymer processing technology, just next to injection molding. The first extruder was invented and patented in 1879 by Matthew Gray, which used Archimedes screw in its design [1]. Since that time, constantly work on improving the work of extruders was carried out, which are implemented in two different ways, technological or construction method [2, 3, 4]. The construction method involves both the modification of the screw construction and the entire barrels of the plasticizing system.
Evidence of the relevance of this issue may be the number of patents describing the classic and unconventional construction of extruders [4].
The following work is a review of the contemporary construction solutions of the plasticizing systems, whose applications were intended to improve the efficiency and effectiveness of the extrusion process. One of the more interesting solutions is the kinematic activation of the plasticizing system's barrel by introducing a rotary sleeve in a plasticizing system whose rotational speed and direction can be freely modified.
Fig. 1 The scheme indicating the partitioning of the heating zones 0—V of the plasticizing system equipped with a rotational
sleeve of the barrel positioned in zones
The introduction of a rotary sleeve into the plasticizing system is able to improve the efficiency of the extrusion process, however, in order to do so, it is necessary to select a numerous technological parameters of the process. After all, the solution seems promising and that is the reason why this solution became the object of interest for the research team of the NEWEX project - Investigation and development of a new generation of machines for the processing of composite and nanocomposite materials.
PRO-TECH-MA 2017 – SURFACE ENGINEERING 2017 International Scientific Conference, Bardejov Spa 20.-23.6.2017
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Fig. 2 Mass flow rate Ġ of the material as a function of the velocity nc of the rotary sleeve of the barrel AT the Speer of rotation of the screw ns; 1- 1,67 s-1, 2 – 5,0 s-1, 3 –
8,33 s-1, dashed line – classic screw, grooved rotary sleeve in the second zone of the plasticizing system, continous line – classic screw, grooved rotary sleeve in the third
zone of the plasticizing system, dotted line – special screw, geometrically uniform rotary sleeve located in the second zone of the plasticizing system
Acknowledgment:
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 734205 .
References:
[1] M. Gray: patent No. 5056 (1879).
[2] F. Johannaber: Kunststoff Maschinen Führer, 4 Ausgabe, Carl Hanser Verlag, München-Wien 2004.
[3] A. Leveque: Mixing element/section of a screw in a plastification apparatus, WO 03043798, (2003).
[4] J.W. Sikora: Konstrukcyjne metody zwiększania efektywności uplastyczniania.
Przetwórstwo Tworzyw 14, 53 (2006).
