PKSC 4300: Extrusion exam
1. Define Plasticate: the removal of crystals to achieve liquid like state
2. What are the primary components of an extruder?: 1) screw: varies for different polymer
application
2) Barrel: Houses the screw
3) Motor
4) Adapter: Connects the barrel exit to die entrance
5) Die: shapes the molten resin
6) Control system
7) Hopper: supplies resin through cooled feed throat
8) Screen pack: keeps out unmelted resin
9) Thermocouple: measures temperature
10) Back pressure sensor: monitors barrel pressure
11) electrical heaters
3. What inputs can we control in an extruder?: - Electrical heaters: maintains proper temperature
- Adapter and die temperature
- Screw RPM
- Feed throat temperature: prevents bridging
4. What are the output parameters of an extruder?: - temperature of molten resin
- back pressure
1. Define Plasticate: the removal of crystals to achieve liquid like state
2. What are the primary components of an extruder?: 1) screw: varies for different polymer
application
2) Barrel: Houses the screw
3) Motor
4) Adapter: Connects the barrel exit to die entrance
5) Die: shapes the molten resin
6) Control system
7) Hopper: supplies resin through cooled feed throat
8) Screen pack: keeps out unmelted resin
9) Thermocouple: measures temperature
10) Back pressure sensor: monitors barrel pressure
11) electrical heaters
3. What inputs can we control in an extruder?: - Electrical heaters: maintains proper temperature
- Adapter and die temperature
- Screw RPM
- Feed throat temperature: prevents bridging
4. What are the output parameters of an extruder?: - temperature of molten resin
- back pressure
