Debarker - Fuji King
The Fuji King Rotary Debarker is an innovative development in debarking technology employing a combination of mechanical abrasion and log-to-log contact to efficiently remove bark from logs of all shapes and species. The result is cleanly debarked logs with minimal fibre loss, from difficult to debark and widely varying furnish.
Logs can be fed either longitudinally from the end or transversely from the side with the wood axis parallel to the debarker axis.
Bond between bark and wood broken at the cambium layer by:
- Contact with debarking plates
- Log-to-log contact
As the rotors turn – they bring the debarking plates into contact with the bark. This contact, along with the log to log contact within the debarking chamber breaks the bond between the wood and the bark at the cambium layer.
With other rotary debarker designs, the plate is installed without an incline. In the Fuji King Rotary Debarker design, the plate is oriented at an angle to the rotor surface rather than level with the surface. This design optimizes the angle of force imparted onto the log and promotes:
- Optimal individual log rotation exposing more of the bark surface to the debarking plates
- Optimal over-all log rotation within the chamber exposing more logs to the debarking plates
Loosened bark drops to the waste conveyor beneath the debarker.
The Fuji King Rotary Debarker design incorporates fixed rotor combs between and to the sides of the rotors. These fixed combs contain slots through which the inclined debarking plates pass as the rotors turn. The action of the plates passing through these slots provides a slicing/shearing action that cuts loosened bark and drives it into the area below the rotors where it is deposited in the waste conveyor. This allows a very effective separation of the fibre and bark streams and eliminates the opportunity for bark remaining and being discharged at the debarker outfeed along with the debarked fibre.
Plate Profile Aggressiveness
The debarking plate profile can be varied to suit variations in:
- Wood species
- Seasonal variation ( e.g. frozen conditions)
- Wood size and shape
The Fuji King Rotary Debarker design offers six different plate profiles that are bolt-on detachable and re-buildable.
The final control variable is the discharge gate. The gate height is controlled by the operator and has the effect of controlling the wood fill level within the debarker. Raising and lowering the gate raises and lowers the fill level of logs within the debarker.
"The Fuji King Debarker is manufactured in North America by Kadant Carmanah under license from Fuji Kogyo Co. Ltd. of Japan."
Full contact of rotors along entire length of log
Far gentler action than conventional drum debarkers
Bark is expelled to a separate conveyor
Modular design ensures the system can be sized to fit any application
The Fuji King Debarker design uses inclined abrasive plates, necessary when dealing with tough species and frozen conditions
Small diameter, crooked, and swept logs can be effectively debarked
Fewer damaged logs, less fiber loss, and lower operating costs
Allows simultaneous processing of a wide variation in species, diameter, length and shapes
Accommodates plant level capacities in Pulp and OSB applications as well as the single module requirements of woodyard residual clean-up