Polymer Melt Temperature in Single Screw Extrusion

1988 ◽  
Vol 3 (3) ◽  
pp. 151-155 ◽  
Author(s):  
K. Wilczynski
Keyword(s):  
Polymer Melt ◽  
Melt Temperature ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Screw Extrusion

scholarly journals Infrared melt temperature measurement of single screw extrusion

2014 ◽  
Vol 55 (5) ◽  
pp. 1059-1066 ◽  
Author(s):  
J. Vera‐Sorroche ◽  
A.L. Kelly ◽  
E.C. Brown ◽  
P.D. Coates
Keyword(s):  
Temperature Measurement ◽  
Melt Temperature ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Screw Extrusion

SSEM-AG Computer Model for Optimization of Polymer Extrusion

2006 ◽  
Author(s):  
K. Wilczynski ◽  
A. Nastaj
Keyword(s):  
Power Consumption ◽  
Extrusion Process ◽  
Global Optimum ◽  
Optimization Techniques ◽  
Operating Conditions ◽  
Melt Temperature ◽  
Local Optima ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Screw Extrusion

The optimization of an extrusion process is a conflicting, multi-objective problem. It is complicated by the number of variables (screw/die geometry, operating conditions, material data) and their non-linear relations, as well as by the opposing criteria, for example extrusion throughput and power consumption. It is difficult to find the global optimum for the process avoiding local optima. There are two approaches to solve the problem, experimental and using a mathematical model of extrusion. Optimization techniques based on an experimentation are time-consuming and very expensive. In this paper we present an optimization methodology based on the Genetic Algorithms (AG), where response surface is given by the extrusion model. A mathematical Single-Screw Extrusion Model SSEM developed at the Warsaw University of Technology is used to predict the extruder behavior, and AG approach is used for optimization. An integrated SSEM-AG system was developed to study optimization of the single-screw extrusion process. Three design criteria (output variables) are selected for optimization: maximum extrusion throughput, minimum power consumption and low melt temperature. As input variables, screw speed, barrel temperature and screw channel depth are chosen.

Analysis of Screw Extrusion of Thermoplastics for AM

2021 ◽  
Author(s):  
Yash Gopal Mittal ◽  
Shivam Prajapati ◽  
Pushkar Kamble ◽  
Dmitriy Trushnikov ◽  
Alain Bernard ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Computer Aided Design ◽  
Polymer Melt ◽  
Deposition Process ◽  
Power Requirement ◽  
Melt Temperature ◽  
Single Screw Extrusion ◽  
Screw Extrusion ◽  
Torque Capacity

Abstract 3D printing is an Additive Manufacturing (AM) process that enables physical realization of a CAD (Computer-Aided Design) model. 3D printing can be classified into several variants; Material Extrusion Additive Manufacturing (MEAM) is the most versatile and widely used. MEAM is a continuous extrusion and selective deposition process commonly used for thermoplastics. Screw Extrusion Additive Manufacturing (SEAM), a sub-domain of MEAM, uses an extruder screw to push the polymer-melt out of the nozzle. Computational Fluid Dynamics (CFD) analysis of a single screw extrusion of thermoplastics is presented in this paper. The effect of various control parameters like screw rotation, wall heat flux/temperature profile, screw geometry, etc., has been studied on the required output parameters like productivity, torque capacity, power requirement, metering efficiency, etc. It is found that the incrementally-variable-pitch screw geometry provides the best metering characteristics. However, every screw design is a compromise between melt temperature, productivity, and power requirements.

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