To provide an electrostatic separator which is reduced in occupancy volume, low in cost, can obtain a sufficient contact area and attains an electrostatic separation highly precisely.
In the electrostatic separator, mixed plastic pieces of four kinds or more are electrified on an electrification part 1, thereafter, the plastic pieces are supplied to an electrostatic field between a rotation electrode and a counter electrode in a supply part 2 and one kind of the plastic pieces as the target is separated by the operation of the electrostatic field. The electrification part 1 is constituted by a transport hose 12 through which the plastic pieces are conveyed from a starting material vessel 11 to a supply tray 5 by a pneumatic pump 13 and protruded parts 12a are formed on the inner surface of the transport hose 12. When the kind of the plastic pieces as the separation target is on the intermediate position in the electrification rank, at least the inner surface of the transport hose 12 and the surface of the protruded and recessed parts are covered with a plastic of the same quality with the kind of the plastic pieces as the separation target. On the other hand, when the kind of the plastic pieces as the separation target is on the end part position in the electrification rank, at least the inner surface of the transport hose 12, and the surface of the protruded and recessed parts are covered with a plastic of the same quality with plastic pieces of the kind adjustment to the same plastic in the electrification rank.
TSUKAHARA MASANORI
MAEHATA HIDEHIKO
