Patent ID: 6720514
Filing Date: 2004-04-13
Classification: B03C,B29B,B29K,Y02W

Abstract:
A plastic sorter comprising a tribo electrifying apparatus for tribo-electrifying a plurality of types of plastic pieces by agitation, a feeder for feeding the plastic pieces electrified by the tribo electrifying apparatus, a static separating section for statically separating and sorting the plastic pieces fed by the feeder according to their polarities and amounts of electrification, and a collecting section for collecting therein the plastic pieces passed through the static separating section and separated from one another, said static separating section being provided with a drum electrode that can be freely rotated around a horizontal shaft and an opposite electrode disposed adjacent to the drum electrode to define a space used as a sorting static field,wherein said feeder includes a feed tray for guiding the electrified plastic pieces onto said drum electrode and a vibrator for vibrating the feed tray, and said opposite electrode having a surface portion facing the drum electrode, said sorting static field being defined between the surface portion of the opposite electrode and the drum electrode, and said opposite electrode, except for said surface portion thereof, being covered by an insulating resin material.