Device for comminuting plastic waste material

Details Device for comminuting plastic waste material Device for comminuting plastic waste material

B - Operations, Transporting

02

C

B02C 18/22 (2006.01)

Patent

CA 2399082

An apparatus for comminuting waste of synthetic plastic material comprises a housing (1) in which at least one rotor (2) is bearingly supported for rotation around a, preferably horizontal, axis by a motor. The rotor (2) is provided on its periphery with comminuting tools acting onto the supplied material, in particular knives 6, counter tools, in particular counter knives (8), assigned to the knives, being stationarily disposed within the housing (1) forming a supply well (7) of great volume. The material disposed within the supply well (7) is pressed against the rotor (2) by a supply means which comprises at least two slides (17, 18) superimposed above each other and supplying the material to the rotor (2), which slides are independently from each other moveable against the rotor (2) or away from it. The front surface of the lowermost (17) facing the rotor (2) defines with the tangent (44) to the enveloping circle (26) of the comminuting tools (6) carried by the rotor (2) a substantially wedge-shaped intake gap (24) for the material to be comminuted. This intake gap (24) narrows to below up to its lower end. (Fig. 1)

Dispositif de broyage de déchets plastiques, qui comporte un boîtier (1) dans lequel au moins un rotor (2) est monté rotatif sous l'effet d'un moteur, autour d'un axe de préférence horizontal. Le rotor (2) est doté sur son enveloppe externe d'outils de broyage agissant sur la matière introduite, en particulier de couteaux (6), auxquels sont associés des contre-outils, en particulier des contre-couteaux (8), montés à demeure dans un boîtier (1) formant une cage d'alimentation (7) de grand volume. La matière se trouvant dans la cage d'alimentation (7) est pressée contre le rotor (2) par un dispositif d'alimentation qui comporte au moins deux barres coulissantes (17, 18) placées l'une au-dessus de l'autre et poussant la matière vers le rotor (2), ces deux barres coulissantes pouvant effectuer un mouvement de va-et-vient indépendamment l'une de l'autre par rapport au rotor (2). La face avant de la barre coulissante inférieure (17) orientée vers le rotor (2) forme, avec la tangente (44) du cercle (26) constitué par les lignes de flanc des outils de broyage portés par le rotor (2), un espace d'alimentation (24) essentiellement en forme de coin pour la matière à introduire. L'espace d'alimentation (24) se rétrécit vers le bas jusqu'à son extrémité inférieure.

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