| 摘要 |
PURPOSE:To reduce costs and to improve the recovery rate of products by using the semi-finished product of a toner which is crushed to <=30mu grain size as a raw material and executing a series of stages for grinding, granulating and mixing within the same vessel. CONSTITUTION:The raw material powder which is made into <=3mu grain size by the premixing, kneading, cooling, and crushing stages are charged into the vessel rotating at a high speed and are pressed by centrifugal force to the inside peripheral face of the vessel to form a powder layer. This powder layer is subjected to a series of the treating stages from crushing to granulating, sizing and homogenization mixing in the one vessel by using a powder treatment device which imparts the powerful compressive friction by a stator and the agitating and mixing by a scraper to the powder layer and spherodizes the powder by the friction heat in the raw material powder and separately added heating means. Both the initial and running costs are thereby reduced and the efficiency and the product recovering rate are improved. |
