Method and apparatus for recycling waste materials including...

B - Operations – Transporting – 29 – B

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B29B 17/00 (2006.01) B29B 9/06 (2006.01) B29B 13/10 (2006.01) B29B 17/02 (2006.01) B29C 45/47 (2006.01) B29C 47/40 (2006.01) B29C 47/62 (2006.01)

Patent

CA 2190351

A method of recycling waste material in- cluding a first fraction of particulate thermoplas- tic material and a second fraction of particulate material at least some of which is substantially unaffected by thermoplastic processes, compris- ing the steps of: a) introducing said fractions into an apparatus having at least one shearing zone: b) during the passage of said fractions through said apparatus, subjecting the fractions to shearing forces in said at least one shearing zone to plasti- cize said first fraction and to intimately mix said first and second fraction to produce a plastic mass wherein said second fraction is disbursed in, and surrounded by said first fraction; and c) restricting the flow of said fractions through said apparatus at at least one position downstream from the po- sition at which said first fraction is plasticized to increase the pressure in said shearing zone.

L'invention concerne un procédé pour recycler des déchets comprenant une première fraction de matières thermoplastiques particulaires et une seconde fraction de matières particulaires dont au moins une partie n'est pratiquement pas affectée par des processus appliqués aux matières thermoplastiques. Le procédé consiste à: a) introduire les fractions dans un appareil ayant au moins une zone de cisaillement; b) pendant le passage des fractions dans l'appareil, soumettre ces fractions à des forces de cisaillement dans au moins une zone de cisaillement, pour plastifier la première fraction et pour mélanger intimement la première fraction et la seconde fraction, afin de produire une masse plastique où la seconde fraction est dispersée dans la première fraction et entourée par celle-ci; et c) restreindre le débit des fractions à travers l'appareil en au moins une position en aval de la position à laquelle la première fraction est plastifiée, pour augmenter la pression dans la zone de cisaillement.

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