Polymer Extrusion in one of the most important processes in the plastics/ polymers industry. Continuous improvements of the extrusion technologies allow for more efficient production of plastics and novel applications. Extrusion requires deep understanding of materials properties, hardware operation and process analysis. This course covers those fields along with other extrusion attributes such as control and troubleshooting.
Objective
- To understand extrusion fundamentals
- To learn about extrusion machinery and devices
- To understand the extrusion process and its sub processes
- To learn about extrusion process design, operation and control
Principles
- Mass and energy balances
- Thermodynamics of extrusion
- Elasticity
- Crystallization
- Types of Heat Transfer
Polymer properties
- Bulk material properties
- Melt Flow properties
- Thermal properties
Extruder types
- Single Screw
- Multi screw
- Disk
- Ram
- Others
Extruder Hardware
- Drive
- Thrust bearing
- Barrel and feed throat
- Feed hopper
- Screw
- Die
- Heating and cooling
Instrumentation and Control
- Pressure
- Temperature
- Power
- Controllers
- Total system control
Functional process analysis
- Solids conveying
- Drag solids conveying
- Plasticating
- Melt conveying
- Die forming
- Devolatilization
- Mixing
Screw Design
- Die design
- Twin screw extruders
- Troubleshooting of extruders
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