Apparatus for the recovery of heterogeneous waste,...

Details Apparatus for the recovery of heterogeneous waste,... Apparatus for the recovery of heterogeneous waste,...

B - Operations, Transporting

23

B

B23B 7/14 (2006.01) B29B 7/42 (2006.01) B29B 7/84 (2006.01)

Patent

CA 2077495

Apparatus for the recovery of a heterogeneous mass constituted by two or more plastics materials has a cold mixing stage in which the heterogeneous mass, previously chopped, is subjected to a thorough mixing so as to give a uniform mixture. This treatment is performed in a screw mixer (100) whose central region (102) has helical thread sections (104) of opposite hand from one another. The mixed homogeneous mass thus obtained is then subjected to a heat treatment in another screw conveyor in which the core has a section of gradually increasing diameter followed by a sharp discontinuity intended to encourage degasification of the material subjected to the heat treatment.

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