Method and device for disintegrating irregularities in...

B - Operations – Transporting – 27 – N

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B27N 3/14 (2006.01) B27N 1/00 (2006.01) B27N 1/02 (2006.01)

Patent

CA 2411051

Wood fibers (2) which are used in the production of fiberboards are supplied from a metering device (1) through a feed chute (7) to a disintegration roller (12) comprising a plurality of pins (13) on its surface. The disintegration roller (12) rotates at high speed, in such a way that the pins (13) deflect the fibers (6) hitting the disintegration roller (12). The fibers are entrained (6) by the pins (13) and fed through a chute section (17) formed by a partial section (15) of the roller periphery and a wall (16) lying opposite the latter, to an outlet orifice (18) of the chute section (17). Either a forming belt (19) of a forming machine is located beneath the outlet orifice (18), or the fibers (6) pass the outlet orifice (18) into the air duct of an air fiber sifter. The disintegration roller (12) disintegrates irregularities in a fiber stream (6), e.g. fiber bundles, or drops of condensed water.

Des fibres de bois (2), utilisées dans la fabrication de panneaux de fibres, passent d'un dispositif de dosage (1) par une cheminée d'alimentation (7) jusqu'à un cylindre de désagrégation (12) comportant sur sa surface une pluralité de pointes (13). Ce cylindre de désagrégation (12) tourne à haute vitesse, de sorte que les pointes (13) dévient les fibres (6) qui tombent sur le cylindre (12). Ces fibres (6) sont entraînées par les pointes (13) et acheminées vers un orifice de sortie (18) de la partie cheminée (17) après avoir traversé cette dernière, qui est formée par une section (15) du cylindre et par une paroi (16) opposée. Soit le ruban de moulage (19) d'une mouleuse se trouve sous l'orifice de sortie (18), soit les fibres (6) passent de l'orifice de sortie (18) dans le canal d'air d'un séparateur de fibres à air. Ledit cylindre de désagrégation (12) supprime ainsi les irrégularités d'un flux de fibres (6), sous forme, par exemple, de mottes de fibres ou de gouttes d'eau de condensation.

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