Scaling-Up for the Counter-Rotating Twin Screw Extrusion of Polymers.

Area of Science:

• Polymer Engineering
• Process Simulation
• Computational Modeling

Background:

• Scaling up polymer extrusion processes is crucial for industrial production.
• Existing methods for scaling extrusion processes have limitations.
• Counter-rotating twin-screw extrusion requires specialized scaling approaches.

Purpose of the Study:

• To develop a novel computer system for scaling up counter-rotating twin-screw extrusion.
• To enhance extrusion process throughput using genetic algorithms.
• To optimize scaling parameters based on polymer melt temperature and plasticating distributions.

Main Methods:

• Developed a computer scaling-up system for counter-rotating twin-screw extrusion.
• Utilized process simulation with the TSEM (Twin Screw Extrusion Model) program.
• Applied GASES_TWIN (Genetic Algorithms Screw Extrusion Scaling) software based on genetic algorithms.

Main Results:

• The developed system successfully scaled up the extrusion process.
• Scaling criteria included polymer melt temperature at die exit and relative melting length.
• Distributions of polymer melt temperature and plasticating along the screw were optimized.
• A significant increase in extrusion throughput was achieved.

Conclusions:

• The novel scaling system effectively enhances counter-rotating twin-screw extrusion throughput.
• The GASES_TWIN software provides an optimized approach using genetic algorithms.
• This solution complements existing methods for various extrusion process scaling and optimization.