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The basket extruders are not part of the family of screw extruders. These basket extruders have a vertical rotating shaft with 4 extrusion blades located inside a cylindrical screen. The basket extruders are fed through a hopper located above the cylindrical screen while rotating pressure blades assist the material flow into the extrusion zone.
The basket extruder requires a very limited amount of energy to push the material through the screen, resulting in granules with a relatively low density and hardness.
Production scale basket extruders are available in the following models for industrial applications:
- Uniform extrusion pressure across entire screen area
- Choice of extrusion blades to suit process
- Variable shaft rotation speed via mechanical variator or variable speed drive
- Feed hopper with safety grid
- 304SS contact parts