Abstract:
The debarking machine of the instant invention includes a frame having a stationary central hub, a ring rotatably mounted on the frame for rotation about the hub having air-pressure-actuated tools carried on the ring. Power means are provided for rotating the ring. Air passage means extend from the central hub to the ring for supply actuating air to the tools. Air passage means includes a rotary-air-seal coupling, which comprises a substantially U-shaped channel formed of a pair of opposed L-shaped annular structures which extend about the hub and have a first air plenum carried therein. A pair of annular, floating seals are disposed on the interior side walls of the U-shaped channel and a rotary disc, having a second air plenum therein, is mounted on the ring and received in the U-shaped channel, in rotatable contact with the air seals.
Abstract:
A method and apparatus for debarking logs of the type having long-fibre bark. In a first debarking operation, rotary cutterheads remove a portion of the mark so as to leave a bark/no-bark, barber-pole pattern on a log's surface. In a second, downstream debarking operation, scrapers on a rotating ring remove the remaining bark.
Abstract:
A rotation ring barker comprises a stator and a rotor which has an opening for lengthwise feeding of a log and which is associated with a number of working tools, each of which is actuated by a spring mechanism normally striving to maintain the tool yieldingly urged against a log passing through the rotor for removing the bark from the log. If necessary, the individual tools are jointly movable in a direction outwardly from the log against the action of said spring mechanism. Positioned between the rotor and stator is a ring element which is rotatably mounted on said rotor and, during normal operation, follows the rotor. The ring element is connected, via a transmission, with the drive shaft of a pump mounted on and constantly following the rotor. The stator has a braking device adapted to reduce, when need arises, the speed of the ring element relative to the speed of the rotor, preferably to zero, thereby to activate the pump via the transmission so that the pump may transmit to the working tool a force overcoming the pressure of said spring mechanism and causing the tool to swing outwardly away from the center of the rotor.
Abstract:
A bark stripping machine in which a plurality of knives each having a cutting member at one end and a wing member at the other end are pivotably mounted on the inner peripheral surface of a rotary drum, with the cutting members extending toward the center of said rotary drum, and said rotary drum is rotated at a high speed while inserting a wood from the front side of said rotary drum, whereby the bark of the wood is stripped.
Abstract:
The delimber-debarker comprises a suitable frame, a cutter carriage carried in the frame and being driven by a motor through a sprocket and chain, a plurality of cutting heads mounted on journaled shafts provided with pinions operable to engage a ring gear on the carriage and to drive the cutting heads carried in each of the respective cutters, and a feed assembly carried on the frame and being operable to drive a log through the carriage and between the cutters.
Abstract:
A barking method, and an apparatus for utilization of the method, in which a log (6) during a substantially linear feeding movement is brought to pass one or a number of barking means (1; 4, 4'), arranged to perform a surrounding and rotary movement in relation to the log (6). According to the invention, the barking means (1; 4, 4') are pressed into a contact position by influence from centrifugal force during a surrounding and rotary movement in relation to the log (6). The contact pressure of the barking means (1; 4, 4') is continuously variable by increasing/decreasing the rotary speed of the barking means (1; 4, 4') in relation to the log (6). The barking means (1; 4, 4') can be arranged inclined in relation to the feed direction of the log (6), in order to cause a feed movement for the log (6) in direction past the barking means (1; 4, 4').
Abstract:
Un procédé d'écorçage utilise un appareil grâce auquel un tronçon de bois (6), effectuant un mouvement d'avance essentiellement linéaire passe par un ou plusieurs organes d'écorçage (1; 4, 4'), conçus pour effectuer un mouvement entourant et rotatif par rapport au tronçon de bois (6). Selon la présente invention, les organes d'écorçage (1; 4, 4') sont pressés l'un contre l'autre par application d'une force centrifuge durant un mouvement entourant et rotatif par rapport au tronçon de bois (6). La pression de contact des organes d'écorçage (1; 4, 4') peut être variée continuellement par augmentation/diminution de la vitesse rotative des organes d'écorçage (1; 4, 4') par rapport au tronçon de bois (6). Les organes d'écorçage (1; 4, 4') peuvent être disposés de façon inclinée par rapport à la direction d'avance du tronçon de bois (6), afin de permettre à celui-ci d'effectuer un mouvement d'avance dans une direction passant par les organes d'écorçage (1; 4, 4').