A method for chipping of wood and a disc chipper

Details A method for chipping of wood and a disc chipper A method for chipping of wood and a disc chipper

B - Operations, Transporting

27

L

B27L 11/00 (2006.01)

Patent

CA 2331731

A wood chipping method and a disc chipper provided with knives (4). The chips (11), after having separated from a log (3), pass through a chip opening (12) in the disc (1) and hit an impact surface (10) located after a knife. Along different portions of the knife (4), a stronger impact effect is caused in proximity to the centre than in proximity to the outer periphery of the disc. The direction of the impact surface (10) deviates more from the directition of the rear surface (15) of the knife in proximity to the centre of the disc than in proximity to the outer periphery of the disc. The distance of the connecting line between the rear surface (15) of the knife and the impact surface (10) from the cutting edge (16) of the knife can be longer on the outer periphery of the disc than in the centre of the disc.

L'invention concerne un procédé permettant de mettre en copeaux le bois et une déchiqueteuse à disque équipée de couteaux (4). Une fois les copeaux (11) séparés d'un rondin (3), ils traversent une ouverture pour copeaux (12) ménagées dans le disque (1) et viennent heurter une surface (10) d'impact se trouvant après le couteau. Un effet d'impact se produit le long des différentes parties du couteau (4) et est plus marqué à proximité du centre qu'à proximité du pourtour externe du disque. La direction de la surface (10) d'impact s'écarte plus de la direction de la surface arrière (15) du couteau se rapprochant du centre du disques que de celle se rapprochant du pourtour externe du disque. La distance de la ligne de connexion entre la surface arrière (15) du couteau et la surface (10) d'impact du bord tranchant (16) du couteau peut être plus longue sur le pourtour externe du disque qu'au centre du disque.

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