Patent ID: 6271492
Filing Date: 2001-08-07
Classification: B03C,B29B,B29K,Y02W

Abstract:
A frictional charging device that charges crushed chips of a plurality of kinds of plastics by stirring them and feeds them to an electrostatic separator used for sorting, said frictional charging device being characterized in thatsaid device is provided with a stirring vessel rotatable around its axis, and a rotary driving device for rotating said stirring vessel,said stirring vessel having a loading port formed at one end thereof for loading plastic chips,said stirring vessel having a delivery port formed at the other end thereof for delivering charged plastic chips,said delivery port being provided with a plurality of delivery area wires arranged along the cross-section of the stirring vessel, at predetermined intervals and parallel to each other,wherein in order that chips of a particular kind of plastic to be sorted out and plastic chips having a positive or negative polarity reverse to that of said chips of said particular kind of plastic, in the electrification rank for said kinds of plastics forming the chips, may be equal in proportion to each other, particles of either of said plastics are put as a friction assisting material in the stirring vessel,the particles of said friction assisting material being so formed that they are larger than the plastic chips,the spacing between said delivery area wires being set larger than the plastic chips and smaller than the particles of the friction assisting material.