| 摘要 |
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. |
