Apparatus for continuously recycling synthetic plastics...

B - Operations – Transporting – 29 – B

Patent

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Details

B29B 17/00 (2006.01) B02C 13/18 (2006.01) B29B 17/04 (2006.01) B29C 47/10 (2006.01)

Patent

CA 2370949

An apparatus for continuously recycling synthetic plastics material, preferably polyester, comprises a first receptacle for the material in which tools are disposed which comminute and/or mix the material by their motion. The pre-processed material is conveyed from this receptacle through a vacuum- tightly closable conduit into a second receptacle, the interior of which can be evacuated. Also within this second receptacle movable tools for processing the material are provided. The material is conveyed off the second receptacle by means of a screw. Another screw is bearingly supported within the channel and the screw volutions of this screw convey the material from the first receptacle into the second receptacle. Between the screw volutions of this further screw and the second receptacle there is provided at least one damming element in the channel, which is disposed in the flow of the conveyed material. Thereby, a complete vacuum-tightness. of the second receptacle and a continuous operation of the apparatus is enabled.

L'invention concerne un dispositif de recyclage continu de matière plastique, de préférence de polyester, qui comprend une première cuve collectrice (2) pour recevoir la matière et dans laquelle se trouvent des outils (9) mobiles broyant et/ou mélangeant la matière. La matière ainsi prétraitée est transportée hors de cette cuve collectrice (2) jusqu'à une seconde cuve collectrice (19), en passant par un canal (18) pouvant être obturé de manière étanche au vide. Cette seconde cuve collectrice comprend un espace intérieur dans lequel le vide peut être effectué, ainsi que des outils (22) mobiles servant à traiter la matière. Ladite matière est ensuite évacuée de cette seconde cuve collectrice (19) au moyen d'une vis sans fin (30). Il est prévu une autre vis sans fin (15) dans le canal, dont les pas refoulent la matière de la première cuve collectrice (2) à la seconde cuve collectrice (19). Entre les pas de vis (52) de cette autre vis sans fin (15) et la seconde cuve collectrice, il est prévu dans le canal (18) au moins un élément de retenue (39) situé dans le flux de la matière refoulée. Ce système permet de parvenir à une étanchéité complète au vide de la seconde cuve collectrice (19), lorsque le dispositif fonctionne en continu.

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