| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an air classifier making difficult the fusion of particles of a raw material to be classified to the surface of the member in the air classifier, wherein particles of the raw material to be classified collide with each other, hard to generate and realizing the enhancement of toner productivity. SOLUTION: In an air classifier 1 constituted so that air streams containing a raw material to be classified are ejected along the air stream contact surface extended in a curved state of a Coanda block 45 and the raw material to be classified is classified into a coarse powder group, a medium powder group and a fine powder group in a classifying region 9 formed by a plurality of classifying edges 2, 3 by Coanda effect, a plurality of the classifying edges 2, 3 have a tip angleθ(5.0<=θ<=14.0 deg.) and distribute particles of the raw material to be classified to adjacent discharge flow paths 6-8.</p> |
