Device for fractionating and scattering specially fibrous...

B - Operations – Transporting – 27 – N

Patent

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B27N 3/14 (2006.01)

Patent

CA 2286623

The invention relates to a device for fractionating specially fibrous particles having different sizes, specially lignocellulose and/or cellulose- containing fibers, chips or similar particles. The device comprises a dosing hopper (1) containing the non-fractionated particles, a substantially flat sifting device (19) connected downstream to the dosing hopper (1) and a feed unit for the dosing hopper (1) through which the particles are fed from the dosing hopper (1) to the surface of the sifting device (19). A conveyor device with a plurality of portioning segments (17) which are separated from each other and which can move along the surface of the sifting device (19) is provided in the area of the sifting device (19). Part of the particles fed by the feed device to the surface of the sifting device (19) can be moved or displaced along the sifting device (19) on each of said portioning segments. The invention further relates to a device for scattering the preferably fibrous particles treated with binding agents in such a device, e.g. wood fibers, wood chips or the like.

L'invention concerne un dispositif permettant de fractionner en particulier des particules fibreuses de différentes grosseurs, notamment des fibres contenant de la ligno-cellulose et/ou de la cellulose, des copeaux ou des particules similaires. Ce dispositif comprend un réservoir de dosage (1) contenant les particules non fractionnées, un dispositif de criblage (19) sensiblement plat monté en aval du réservoir de dosage (1) et une unité d'alimentation du réservoir de dosage (1), par l'intermédiaire de laquelle les particules peuvent être extraites du réservoir de dosage (1) pour être amenées sur la surface du dispositif de criblage (19). Dans la zone de la surface du dispositif de criblage (19), il est prévu un dispositif de transport muni d'une pluralité de sections de portionnement séparées les unes des autres et déplaçables le long de la surface du dispositif de criblage (19), et dans lesquelles une partie des particules placées par l'unité d'alimentation sur la surface du dispositif de criblage (19) peuvent être transportées, notamment déplacées, au-dessus de la surface du dispositif de criblage (19). Outre ce dispositif, l'invention concerne un dispositif permettant de disséminer des particules de préférence fibreuses mélangées notamment avec des liants, particules telles que des particules de bois, des copeaux de bois ou similaires.

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