| 摘要 |
PURPOSE:To efficiently produce colored resin powder for toner by providing a grinding chamber following an acceleration pipe in which a powdery raw material is carried and accelerated by high-speed air flow and providing a plurality of feed ports of the powdery raw material to the acceleration pipe. CONSTITUTION:A powdery raw material 7 is supplied to an acceleration pipe 3 through the feed ports 1 provided to this acceleration pipe 3. Compressed gas such as compressed air is introduced into the acceleration pipe 3 from a supplying nozzle 2. The powdery raw material 7 supplied into the acceleration pipe 3 is instantaneously accelerated and the made high-speed. The powdery raw material 7 is spouted into a grinding chamber 8 from the outlet 13 of the acceleration pipe at high velocity and collides against the collision face 14 of a collision member 4 and is ground. Thereby, since the powdery raw material 7 can be dispersed and supplied into the acceleration pipe 3 from a plurality of feed ports 1, it efficiently collides against the collision face 14 and grinding efficiency is enhanced. In other words, treating capacity is enhanced in comparison with a conventional grinder. Moreover, the particle diameter of the obtained product can be made smaller in the same treating capacity. |
