Grinder

B - Operations – Transporting – 24 – B

Patent

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Details

B24B 19/22 (2006.01) E21C 49/00 (2006.01)

Patent

CA 2176676

This grinder is for fibrous material such as peat moss, wood and asbestos. It may comprise a generally cylindrical casing with its axis horizontally disposed. The casing may have a top material feeding funnel, vertical end walls, an imperforate, partly cylindrical wall, and a partly cylindrical screen forming the bottom section of the casing and located upstream of the imperforate wall. A rotor may be journalled in the end walls and extend across the casing being co-axial with the imperforate wall and the screen; the rotor may include rigid radial blades with a free edge face defining a smaller gap with the inner surface of the screen and a greater gap with the inner surface of the imperforate wall. This greater gap permits unplugging of the fibrous material which might be caught between the blades and the imperforate wall. The grinder produces separation and alignment of the fibres by the shearing action of the blades moving past the screen. The ground material is ejected through the holes of the screen.

Cette invention concerne un déchiqueteur de matières fibreuses comme de la mousse de tourbe, du bois ou de l'amiante. Il est formé d'un tambour généralement cylindrique à axe horizontal surmonté d'une trémie d'alimentation, fermé aux deux extrémités par des parois verticales et présentant un secteur non perforé et, en amont de celui-ci, un secteur perforé formant une partie de sa moitié inférieure. Un rotor centré dans le tambour est monté à tourillon entre les deux parois d'extrémité; il porte des lames radiales rigides dont le rayon est plus grand dans la partie non perforée du tambour que dans la partie perforée. Le jeu en bout de lame plus grand dans la partie non perforée du tambour permet de dégager la matière fibreuse susceptible de se coincer entre les lames et la paroi non perforée. L'action cisaillante des lames au droit de la partie perforée du tambour réalise la séparation et l'alignement des fibres qui s'évacuent par les perforations dans ce secteur du tambour.

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