Extrusion Technical Services

Twin Screw Simulator

PolyTech's Twin-Screw Extruder Simulator (TXS™)

Product Description

The Twin-Screw Extruder Simulator (TXS™) is a personal computer software package for process simulation and analysis of plastics compounding operations in corotating, intermeshing, modular twin-screw extruders. TXS allows you to obtain quick approximate answers to many processing problems that arise in the compounding plant and the process development laboratory. TXS simulates all the steps in the process: solids conveying, melting, mixing, melt conveying and pressurization, in realistic settings with multiple feed and vent ports. TXS can simulate complex processing operations, such as the extrusion compounding of filled compounds, glass-reinforced materials, color concentrates, liquid addition, etc.
TXS is provided with a set of databases that let you store and organize all your processing data: extruder configurations, materials, and operational settings. An important characteristic of TXS is its graphical approach to assembling and viewing extruder configurations. Components are represented and manipulated as schematic, but easily recognizable and dimensionally accurate, drawings of the actual parts. The barrel and screw are assembled on the screen as it is done in the real world, thanks to TXS point-and-click interface. As a result, TXS is a powerful visualization tool for twin-screw extrusion.
TXS is very fast and extremely easy to use. Although its operation is very simple, TXS is based on sophisticated, state of the art process models. TXS was developed with the assistance and cooperation of the Polymer Processing Institute (PPI) of Hoboken, NJ, and incorporates the advanced twin-screw melting model developed by Prof. Tadmor and Prof. Gogos at PPI. The modular nature of the program, the addition of processing options and user-accessible model parameters, makes TXS a flexible simulator that can be “fine tuned” to match specific extruders, materials, or processes to an unprecedented extent.

Main Features of TXS:

 Fully graphical extruder configuration. Assemble your screw by clicking on screw elements and barrel sections within a graphical palette of available options. Modify existing configurations, add or delete components, etc. while viewing a complete picture of the screw.

 Easy setup of operating conditions. Select resins and fillers from a customizable database; input rate, speed, feed conditions; set the barrel temperature profile and feed protocol (for multi-component, multi-port systems). All in one simple graphical screen.

 Processing options. Use different heat transfer models for a more realistic evaluation of the extruder’s thermal characteristics, or simulate the effect of screw wear on your process.

 Ultra-fast simulation engine. Typical simulations take under one second in an entry-level Pentium system.

 Rule-based “expert system”. TXS analyzes your screw before running a simulation and advises you of potential problems (e.g., vent blocking). After a simulation is performed, TXS analyzes the results, detects problems, and tells you what is wrong and how to correct it.

 Summary of results. Display (and print) tables of global processing parameters that help you evaluate your process: residence time, discharge temperature, power consumption, specific energy input, etc.

 Axial plots. Plot (and print) the values of most important processing variables along the screw: pressure, temperature, fill factor, power, torque, unmolten solids, etc. Plot the results of different simulation runs in a single plot using TXS’s Multi-Plot option for easy trending and comparison.

 Interactive heat transfer and mixing analysis tool. Get key heat transfer parameters barrel by barrel, and key dispersive and distributive mixing parameters, mixing section by mixing section. Compare residence time; shear rate and shear stress, extensional flow components, mixing indices, etc.

 Materials editor. Add new materials specifications for resins and fillers, or modify existing ones, using the separate graphical TXS Materials Editor utility program provided with the package.

 Multiple output options. Print results summaries, text reports, screw configurations, axial plots. Export to high-resolution graphics files for insertion in documents and presentations. Export table of processing variables for use with graphics or spreadsheet software.

=\\=\\= Extrusion Technical Services =\\=\\=

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Consulting: http://www.feedscrews.com/newsdocuments/177.doc

Single Screw Process
Twin Screw Process

Technology:

Friction Testing for Single Screw Feed troubleshooting
http://www.feedscrews.com/viewnews.php?id=176

Patented Screw Technology
Double Barrier Screw
Solids Draining Screw
Left Hook Mixer

Compuplast Extrusion Simulation Software: http://www.compuplast.com/

Rheological Tools : http://www.compuplast.com/RheologyTools.htm
Screw Simulation : http://www.compuplast.com/extruder.htm
Flat die Simulation : http://www.compuplast.com/flatdie.htm
Chill Roll Simulation : http://www.compuplast.com/chill_roll.htm
Profile Die Simulation : http://www.compuplast.com/profile.htm
Profile Cooling Simulation: http://www.compuplast.com/ProfileCooling.htm
Co-extrusion Simulation : http://www.compuplast.com/Multi_Layer.htm
2D Flow Simulation : http://www.compuplast.com/2D%20FEM.htm
3D Flow Simulation : http://www.compuplast.com/flow3d.htm

PolyTech Twin Screw Simulation Software

TXS Twin Screw Simulation
Blends and Alloy
Reactive Extrusion
http://www.feedscrews.com/viewnews.php?id=183

Weber Systems

CAD/CAM Screw design software
http://www.feedscrews.com/viewnews.php?id=207

NDT
Ultrasonic plasticating process measurement
Injection
Extrusion: http://www.feedscrews.com/viewnews.php?id=224
Foam

Flite Technology

Screws of any type
Barrels of any type
http://www.flitetech.com/

Gimac

Micro Extruders
12MM screw accepts full size pellet
0.1- 7 lbs./hr
Micro Extrusion Auxiliary Equipment
http://www.feedscrews.com/viewnews.php?id=223

Paulson Training

Single Screw and Twin Screw Extrusion Training Videos
Injection Molding Simulator
http://www.feedscrews.com/viewnews.php?id=225

Discuss extrusion topics at FeedScrewDesigns.com (Tom Cunningham a moderator)

http://www.feedscrewdesigns.com/cgi-bin/forums/Ultimate.cgi?action=intro&BypassCookie=true

Contact Information:

Tom Cunningham
Principal Consultant
Extrusion Technical Services
HCR #1 Box 635
13 Jessica Ct.
Brodheadsville, PA 18322
USA
570-992-0961
888-610-1020 Toll Free
570-402-1176 Fax
570-236-2988 Cell
tomcun@ptd.net

This Power Point presentation shows various TXS screen shots: