| 摘要 |
PURPOSE: To largely improve the comminuting efficiency by first discharging a thermosetting resin of a molten state from the opening of a rotating rotor, forming the resin in a fiber state specified in the diameter, and then forming it as a finely particlelike resin by using an arbitrarily comminuting step. CONSTITUTION: A thermosetting resin is formed in a molten state by an extruder 1, introduced from the introducing unit of the upper part of a rotor 1, discharged by a centrifugal force, and formed in a fiber state in which the diameter is 1.0 to 20.0α(whereαis the mean particle size of the obtained finely particlelike thermosetting resin). The diameter of the fiber is regulated according to the supplying speed and viscosity of the resin of the molten state and the rotating speed of the rotor 2 in addition to a disc shape. If the diameter of the fiber is 20.0αor less, the mean diameter of the powder after comminuting cannot be made to beα. Thereafter, the resin is transferred to and comminuted by a comminutor 3 with the air used also for cooling, fine particles are removed by a cyclone 4 to obtain a fine particlelike resin having the particle size distribution of theαof the mean particle size. |
