Plug Screw Feeder

The screw feeder consists of a chip inlet, tapered compression zone, chip/and drain outlet. The feed screw is journaled by oil-lubricated bearings, and driven by a frequency controlled AC-motor via a foot-mounted gear reducer. The shaft is sealed with a stuffing box.

The plug screw feeder compresses the chips to:

• Remove pitch, water and remaining air, without shortening fiber length
• The highly compressed chips are discharged into the impregnator via a blow-back piston
• The pressate is recycled back to the chip wash to maximize pulp yield
• The screw is easy to operate and needs very little maintenance