On-Line Measurement of Rheological Properties of LDPE, HDPE and LDPE/MICA Systems in Single-Screw Extrusion

2014 ◽  
Vol 941-944 ◽  
pp. 1788-1791
Author(s):  
Hong He ◽  
Jian Guo Zhou
Keyword(s):  
Rheological Properties ◽  
Extrusion Process ◽  
Multiphase System ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Single Screw Extruder ◽  
Line Measurement ◽  
Screw Extrusion ◽  
On Line

The quality of extrudate is closely related to its rheological properties during extrusion. Therefore, on-line measurement of rheological properties of polymer is important in extrusion process. In the present work, comparisons between the on-line viscosities of LDPE in single screw extruder and that in lab under the same condition were made by using online rheometer. Effects of set temperature of on-line rheometer, screw configuration and different positions, as well as weight proportions of filler, size of MICA particles of LDPE/MICA multiphase system on the melt viscosity in single screw extrusion are discussed.

scholarly journals Influence of the parameters of the extrusion process on the properties of PLA composites with the addition of graphite

2021 ◽  
Vol 1199 (1) ◽  
pp. 012057
Author(s):  
K Fiedurek ◽  
P Szroeder ◽  
M Macko ◽  
A Raszkowska-Kaczor ◽  
N Puszczykowska
Keyword(s):  
Power Consumption ◽  
Cone Calorimeter ◽  
Extrusion Process ◽  
Screw Extruder ◽  
Single Screw ◽  
Grain Sizes ◽  
Single Screw Extrusion ◽  
Single Screw Extruder ◽  
Screw Extrusion ◽  
Screw Diameter

Abstract The main purpose of the work is to determine the influence of the screw diameter on the parameters of the single screw extrusion process, such as power consumption, torque, throughput, the actual temperature of the melt on the extruder die, as well as phase s with the use of a laboratory single-screw extruder.. The research was carried out with the use of various plasticizing systems. Two types of graphite: pre-expanded and normal grade with different grain sizes were used in the research. Flammability tests of the obtained composites were carried out using cone calorimeter.

scholarly journals The Effects of Antioxidants Content on Mechanical Properties and Water Absorption Behaviour of Biocomposites Prepared by Single Screw Extrusion Process

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Mohd Hafizuddin Ab Ghani ◽  
Mohd Nazry Salleh ◽  
Ruey Shan Chen ◽  
Sahrim Ahmad ◽  
Mohd Rashid Yusof Hamid ◽  
...  
Keyword(s):  
Rice Husk ◽  
Extrusion Process ◽  
Modulus Of Rupture ◽  
Screw Extruder ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Single Screw Extruder ◽  
Flexural Testing ◽  
Hybrid Fillers ◽  
Screw Extrusion

The performance of hybrid fillers between rice husk and sawdust filled recycled high density polyethylene (rHDPE) with the presence of antioxidants (IRGANOX 1010 and IRGAFOS 169, with the ratio of 1 : 1) was investigated. The biocomposites with 30 wt% of matrix and around 70 wt% of hybrid fillers (rice husk and sawdust) and different antioxidants’ contents (0 to 0.7 wt%) were prepared with single screw extruder. Increasing the amount of antioxidants in biocomposites reduced the modulus of elasticity and modulus of rupture on flexural testing. The addition of antioxidants increased the tensile and impact strength of biocomposites. From the study, samples with 0.5 wt% of antioxidants produce the most reasonable strength and elasticity of biocomposites. Furthermore, the effect of antioxidants content on water uptake was minimal. This might be caused by the enhanced interfacial bonding between the polymer matrix and hybrid fillers, as shown from the morphology by using scanning electron microscopy (SEM).

N-Lamina Model of Extrusion Pressure of Non-Plug Flow Solid Conveying in Feeding Section by Single-Screw Extrusion Molding

2011 ◽  
Vol 221 ◽  
pp. 271-277 ◽  
Author(s):  
Chun Hui Liu ◽  
Jian Hua Qin ◽  
Da Li Shi
Keyword(s):  
Plug Flow ◽  
Extrusion Pressure ◽  
Powder Materials ◽  
Screw Extruder ◽  
Molding Process ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Single Screw Extruder ◽  
Screw Extrusion ◽  
Solid Conveying

While extrusion molding with single-screw extruder, extrusion pressure comes into being from feeding section; it is one of the basic conditions to ensure that extrusion process can be carried on normally, in order to ensure molding process goes smoothly, it must meet the following requirement: extrusion pressure generated during the process must be sufficient. Therefore it has certain engineering significance to design structure of a single screw correctly that a mathematical model for formation of extrusion pressure during single-screw extrusion molding will have to be established. This paper conducted a research on theory of extrusion pressure when powder of pure UHMWPE resin is still in feeding section by molding in barrel of the single screw extruder specially designed for pure UHMWPE, and established a n-lamina model of powder materials or grain materials which is in feeding section and at the state of non-plug flow solid conveying, and it provided a method to calculate extrusion pressure of the n-lamina model, thus it enriched and perfected theory of single-screw extrusion molding.

The Effect of Screw Speed on Extrusion Quality of the Single-Screw Extruder

2014 ◽  
Vol 941-944 ◽  
pp. 1715-1719
Author(s):  
Yuan Lou Gao ◽  
Xin Wang ◽  
Li Zhou
Keyword(s):  
Extrusion Process ◽  
Screw Extruder ◽  
Screw Speed ◽  
Element Analysis ◽  
Outlet Pressure ◽  
Single Screw ◽  
Single Screw Extruder ◽  
Multi Phase Flow ◽  
Multi Phase

This paper adopts the method of multi-phase flow to simulate the extrusion process of single-screw extruder based on different screw speed by using the finite element analysis software, and get the conclusion that the screw speed has a significant effect on the extrusion quality and outlet pressure of the single-screw extruder. With the increase of the screw speed, the extrusion quality of the single-screw extruder gets worse and the outlet pressure of the single-screw extruder increases.

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