Method and apparatus for cleaning thermoplastic material for...

Details Method and apparatus for cleaning thermoplastic material for... Method and apparatus for cleaning thermoplastic material for...

B - Operations, Transporting

29

B

B29B 17/02 (2006.01)

Patent

CA 2058655

METHOD AND APPARATUS FOR CLEANING THERMOPLASTIC MATERIAL FOR REUSE ABSTRACT Apparatus and a method for its use in cleaning comminuted thermoplastic material for reuse in manufacture of molded plastic products. Batches of plastic including adherent label materials and adhe- sives are agitated by a rotor until frictionally heated to a predetermined temperature. A flow of air is used to carry away loosened labels and adhesives. A small amount of water is introduced as a spray to dissolve adhesives and soften remaining label materials further, while loosened pieces continue to be removed in a stream of air. Thereafter, remaining adherent par- ticles are removed in an aspirator providing a multi- stage cascade through counter currents of air, and the particle-carrying air is then cleaned in a cyclone separator.

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