CLASSIFYING DEVICE AND TONER MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a classifying device improving the dispersion properties in a dispersing chamber of the classifying device by the simple variation of equipment, achieving the improvement of classifying accuracy in the classifying chamber of the classifying device and separating particles in the range of required sizes with high efficiency and also provide a toner manufacturing method for manufacturing toners of a desired particle diameter by the above classifying device. SOLUTION: The classifying device is used for discharging a microfine powder by receiving swirl flows formed inside the dispersing chamber out of a powder material fed from a powder material feed opening disposed on the upper section of the dispersing chamber (3) of the classifying device, and the microfine powder material is guided to the classifying chamber and classified into rough powder and fine powder by the centrifugal separation. The swirl flow rate in the dispersing chamber is increased by a residue prevention means (11) provided in the classifying chamber and solid particles of the powder material are prevented from remaining thereon.