1. Introduction to Extruders
o Single Screw Extruders
o Twin Screw Extruders
2. Safety
o Moving Parts & Nip Points
o Electricity/Grounding
o High Temperatures
o High Pressures
3. Drive System
o Motor
o Gearbox
o Thrust Bearing
4. Screw and Barrel
o Materials of Construction
- Standard Materials
- Corrosive Resistance
- Wear Resistance
- Specialty Materials
- Screw/Barrel Material Compatibility
o Flight Treatment
o Screw/Barrel Clearances
- Heated Barrel
- Cooled Feed Throat
o Screw/Barrel Wear
o Barrel Alignment
- Consequences of Misalignment
- Alignment Techniques
o Feed Housing
- Temperature Control
- Cooling Channel Blockage
o Screw/Barrel Cleaning
- Pulling Screw
- Cleaning Screw/Barrel
- Measurements
- Breaker Plate/Screen Pack Installation
- Replacing Screw
5. Instrumentation
o Sensor Calibration
o Heater Installation and Diagnostics
o Thermocouple Installation and Diagnostics
o Pressure Transducers
6. Proper Operation Methods
o Start-up
o Normal Operation
o Shutdown
7. Purging
o Material Types
o Purging Methods
8. Troubleshooting Mechanical Problems
o Vibrations/Unusual Sounds
o High/Low Temperature
o Low/No Output
o Output Instabilities
o Excessive Pressure
o Vent Flow
o Plastic Leakage |
