| 摘要 |
<p>An apparatus for producing a granulated material from used thermoplastic material, such as plastics foil, and an aqueous filler material, such as sawdust. The apparatus comprises a cutting unit (1) provided with knives (9, 30) for the thermoplastics, a worm extruder unit (2) for plastifying the thermoplastic material and communicating with the cutting unit (1), as well as a granulating unit (3). The rotating knives (9) of the cutting unit (1) are arranged on a cylinder unit (8) mounted in an elongated chamber (7). The fastening spots of the knives (9) are preferably placed on at least one helical line on the surface of the cylinder unit (8). The cutting unit (1) is mounted parallel to and opposite the worm extruder unit (2) in such a manner that said worm extruder unit can emit heat to said cutting unit. The cutting unit (1) comprises at least two temperature and/or moisture sensors (15a-15g) inside the chamber (7) and in addition heat-regulating means controlled by said temperature and/or moisture sensors (15a-15g) so as to ensure a regular evaporation of the water in the filler material which is thereby dry when passing from the cutting unit (1) into the worm extruder unit (2). The worm extruder unit is provided with at least two thermostatically controlled (19a, 19b, 19c) auxiliary heat tapes (18a, 18b, 18c). In this manner a very reliable production of the granulated material is achieved without risking vapour explosions inside the worm extruder unit. <IMAGE></p> |
