Why Does Screw Extrusion Work?
Because screws combine rotational motion and friction then turn it into bulk linear motion.
this requires the bulk to be solid
only then it can be transported further
Screw and Barrel
Hopper (bridging and gravity feed)
Dies or Nozzles
Compression
Melt (melt ribbon)
Melt Plug (filament vs screw)
Pressure
Temperature
Backpressure
Retraction