Patent ID: 9207552
Filing Date: 2015-12-08
Classification: G03G

Abstract:
1. A classifying apparatus comprising: a cylindrical casing, a powder material feeding port for feeding high-pressure air and powder material to the cylindrical casing, a louver ring disposed in the casing so as to be in communication with the powder material feeding port in a horizontal direction, the louver ring having a plurality of arc-shaped guide slats annularly arranged, wherein the classifying apparatus satisfies a relationship of α≧30° where, in the horizontal cross section, a denotes an angle formed between lines connecting the center of the louver ring with both ends of each of the guide slats, a center core disposed at the powder material-discharged side of the powder material feeding port, a separator core disposed at the powder material-discharged side of the center core, the separator core having an opening at a center thereof, a dispersion chamber defined by the center core and an inner wall of the casing at the powder material-fed side, the dispersion chamber being for dispersing the powder material together with the high-pressure air, wherein the louver ring is disposed in the dispersion chamber, a classification chamber defined by the center core, the separator core and a side inner wall of the casing, the classification chamber being for centrifugally separating the powder material fed from the dispersion chamber into fine powder and coarse powder, and a flow path encircling the louver ring, the flow path receiving the high-pressure air and the powder material fed from the powder material feeding port, wherein in a horizontal cross section of part of the classifying apparatus where the part contains the powder material feeding port and the louver ring, the louver ring is located at a position where the louver ring does not intersect with an extended line of a wall surface of the powder material feeding port at the side of the louver ring.