DEVICES FOR THE RELAXATION OF BULK ARTICLES CONTAINING DRAWN THERMOPLASTICS AND FOR THE SELECTIVE SOFTENING OF THERMOPLASTICS IN A MIXTURE FLOW FOR RECYCLING

摘要

PCT No. PCT/EP96/00293 Sec. 371 Date Jul. 25, 1997 Sec. 102(e) Date Jul. 25, 1997 PCT Filed Jan. 25, 1996 PCT Pub. No. WO96/22867 PCT Pub. Date Aug. 1, 1996A worm or screw conveyor for the thermal treatment of a bulk containing thermoplastics and which has an elongated housing along which the bulk material is conveyed by a worm or screw. The worm or screw has a certain peripheral diameter and is rotatable about the worm axis to displace the bulk material therealong and an infrared heater is located in the housing centrally of the peripheral diameter for directly exposing bulk material in the housing to infrared radiant energy to heat the bulk material.