Abstract: The invention relates to method of supporting a unloading conveyor bridge extending substantially horizontally at the bottom level of a bulk material pile storage, implemented as supports in the area of the bridge ends as well as in at least one point therebetween. At least one of the supports is positionally adjusted in the vertical direction. The support force is thereby kept substantially constant at the actual support point. For the adjustment can be used spring loading, fluid pressure loading or gravity loading, for example.

Abstract: A knife system of a disc chipper, the knife in said system being clamped to its operation position between a wear plate and a press block. The wear plate is supported to the knife disc adjustably for the inclination with respect to the surface of the knife disc. The adjustability is provided by means of a hinge and an adjustment strip. The hinge strip is located adjacent a knife and the adjustment strip is located at the next chip opening. A convergent space is provided for the adjustment strip. The adjustment strip is correspondingly wedge-shaped and has a position adjustable and locking means.

Abstract: A knife system of a disc chipper, the knife in said system being clamped to its operation position between a wear plate and a press block. The wear plate is supported to the knife disc adjustably for the inclination with respect to the surface of the knife disc. The adjustability is provided by means of a hinge and an adjustment strip. The hinge strip is located adjacent a knife and the adjustment strip is located at the next chip opening. A convergent space is provided for the adjustment strip. The adjustment strip is correspondingly wedge-shaped and has a position adjustable and locking means.

Abstract: The invention relates to method of supporting a unloading conveyor bridge extending substantially horizontally at the bottom level of a bulk material pile storage, implemented as supports in the area of the bridge ends as well as in at least one point therebetween. At least one of the supports is positionally adjusted in the vertical direction. The support force is thereby kept substantially constant at the actual support point. For the adjustment can be used spring loading, fluid pressure loading or gravity loading, for example.

Abstract: The present invention concerns an apparatus for receiving and feeding into a chipper wood to be chipped, said apparatus containing a feed conveyor receiving log bundles, a tumbling drum breaking the bundles, and a receiving conveyor. The feed conveyor is speed-controlled according to the position information of a log bundle, and the speed of rotation of the tumbling drum is adjusted depending on the amount of wood discharged from the drum. The position information of the log bundle is received for example from the torque moment or input power of the drives of the drum. Thereby the speed of the feed conveyor, respectively the rotation speed of the drum, is set to slow down as a result of the increasing toque moment or input power of the drum, respectively to speed up as a result of the decreasing torque moment or input power.

Abstract: The invention concerns a method for clamping a knife of a disc chipper, wherein the knife is pressed from the knife disc via knife a clamp against a wear plate in a diagonal position (?) with respect to the plane of the knife disc with a compressive force (N) substantially parallel with the axis of the knife disc. According to the invention, the compensating force of the force directed to the knife clamp, caused by the diagonal position (?) of the knife and transversal to the compressive force (N) is exerted to the wear plate.

Abstract: The invention concerns a method and an apparatus for drum debarking of wood, the bark being removed from the wood in a debarking drum being rotatable alternatively in the opposite directions and having different debarking properties in the alternative directions of rotation thereof. According to the invention, the wood and the loosened bark along with it are guided to a bark separation dependent on the direction of rotation of the debarking drum.

Abstract: The present invention concerns an apparatus for receiving and feeding into a chipper wood to be chipped, said apparatus comprising a feed conveyor (12) receiving log bundles (1?), a tumbling drum (13) breaking the bundles, and a receiving conveyor (7?). The feed conveyor (12) is speed-controlled according to the position information of a log bundle (1?), and the speed of rotation of the tumbling drum (13) is adjusted depending on the amount of wood discharged from the drum. The position information of the log bundle is received for example from the torque moment or input power of the drives of the drum. Thereby the speed of the feed conveyor, respectively the rotation speed of the drum, is set to slow down as a result of the increasing toque moment or input power of the drum, respectively to speed up as a result of the decreasing torque moment or input power.

Abstract: The present invention concerns a method for fixing a knife in wood chipper apparatuses over the whole knife length between two steady surfaces. The fixing force is developed by means of a roller chain located between two counter surfaces and reversing its direction at each of its couplings, the roller chain having stationary end rollers and intermediate rollers at the couplings, the intermediate rollers rolling during the press movement in the longitudinal direction of the chain. An external force is applied to the roller chain, the force changing its direction at the touching points of the rollers, so that the force applied to the roller chain affects to multiple points of the counter surfaces thus forming a prominent total pressing force.

Abstract: The object of the invention is an apparatus for storage of wood chips in a curved-top stockpile the apparatus consisting of a central tower, which supports a conveyor for loading the chips and a beam-like turning pile composer, and a unloading beam supported on ground level on the lower part of the tower as well as on supporting wheels and furnished with unloading devices for transporting the wood chips towards the center of the apparatus. The central tower is furnished at one side with a tubular ex-central opening, and the tower occupies a central tube for delivering the wood chips either upwards or downwards from the opening. The unload drive for the unloading device is positioned inside the tower and the stockpile yard is furnished with a wall at the reach of the unloading device.

Abstract: The object of the invention is an apparatus for storage of wood chips in a curved-top stockpile the apparatus consisting of a central tower, which supports a conveyor for loading the chips and a beam-like turning pile composer, and a unloading beam supported on ground level on the lower part of the tower as well as on supporting wheels and furnished with unloading devices for transporting the wood chips towards the center of the apparatus. The central tower is furnished at one side with a tubular ex-central opening, and the tower occupies a central tube for delivering the wood chips either upwards or downwards from the opening. The unload drive for the unloading device is positioned inside the tower and the stockpile yard is furnished with a wall at the reach of the unloading device.

Abstract: The present invention concerns a method and an apparatus for removing gas from comminuted lignocellulose material, wherein material is heated with steam to a degasification temperature and the heated material flow is led as a dense composed bed through a gas removal stage. The material is heated by introducing a steam flow into the material flow in transversal direction with respect to the direction of the material flow.

Abstract: The object of the invention is an apparatus for storage of wood chips in a curved-top stockpile the apparatus consisting of a central tower which supports a conveyor for loading the chips and a beam-like turning pile composer, and a unloading beam supported on ground level on the lower part of the tower as well as on supporting wheels and furnished with unloading devices for transporting the wood chips towards the center of the apparatus.

Abstract: The present invention concerns a method for fixing a knife in wood chipper apparatuses over the whole knife length between two steady surfaces. The fixing force is developed by means of a roller chain located between two counter surfaces and reversing its direction at each of its couplings, the roller chain having stationary end rollers and intermediate rollers at the couplings, the intermediate rollers rolling during the press movement in the longitudinal direction of the chain. An external force is applied to the roller chain, the force changing its direction at the touching points of the rollers, so that the force applied to the roller chain affects to multiple points of the counter surfaces thus forming a prominent total pressing force.

Abstract: The present invention concerns a chipping or crushing apparatus having a prominent speed of rotation and mass inertial moment. The main parts of the apparatus include a chipping disc or a rotor, a short circuit motor and a frequency converter connected to the circuit of the motor. From the chipping disc, respectively from the rotor or from the motor there is arranged a data connection of the speed of rotation to the frequency converter, and the frequency converter has been arranged to control the frequency of the motor current by means of said data so, that in a situation of peak load, when the motor load (torque M) has reached the nominal load, the frequency converter keeps the motor load at the nominal load by decreasing the frequency of the motor current. Thereby kinetic energy of the rotating components will be released for use in the peak loads corresponding to the decrease of the speed of rotation.

Abstract: The present invention concerns a chipping or crushing apparatus having a prominent speed of rotation and mass inertial moment. The main parts of the apparatus comprise a chipping disc or a rotor, a short circuit motor and a frequency converter connected to the circuit of the motor. From the chipping disc, respectively from the rotor or from the motor there is arranged a data connection of the speed of rotation to the frequency converter, and the frequency converter has been arranged to control the frequency of the motor current by means of said data so, that in a situation of peak load, when the motor load (torque M) has reached the nominal load, the frequency converter keeps the motor load at the nominal load by decreasing the frequency of the motor current. Thereby kinetic energy of the rotating components will be released for use in the peak loads corresponding to the decrease of the speed of rotation.

Abstract: The invention concerns a method for clamping a knife of a disc chipper, wherein the knife is pressed from the knife disc via knife a clamp against a wear plate in a diagonal position (a) with respect to the plane of the knife disc with a compressive force (N) substantially parallel with the axis of the knife disc. According to the invention, the compensating force of the force directed to the knife clamp, caused by the diagonal position (a) of the knife and transversal to the compressive force (N) is exerted to the wear plate.

Abstract: The object of the invention is an apparatus for storage of wood chips in a curved-top stockpile the apparatus consisting of a central tower which supports a conveyor for loading the chips and a beam-like turning pile composer, and a unloading beam supported on ground level on the lower part of the tower as well as on supporting wheels and furnished with unloading devices for transporting the wood chips towards the center of the apparatus.

Abstract: The present invention concerns a method for manufacturing wear plates of a disc chipper. The wear plate is provided with a plated surface by sintering in an oven at a temperature of 900-1000° C. Selective portions of the wear plate are strengthened by quenching and hardening utilizing the temperature achieved in connection with sintering.

Abstract: The present invention relates to method for separating loose bark from a flow of debarked wood logs are conveyed substantially in the direction of their longitudinal axis along a substantially horizontal conveyor track. During their travel, the logs are forced into unidirectional accelerating rotation that simultaneously moves the logs laterally. An accelerating rotary motion is advantageously imparted to the logs on a rolling ramp adapted between two conveyors operating at different height levels.