| 摘要 |
PURPOSE:To obtain improved resin shot material, that enables the automation of continuous production, the improvement of labor saving and the stability of material-quality by a method in which after the amino resin such as urea resin and melamine resin, etc., has been kneaded and extruded, it is crushed and pelletized and then is dry- and cure-treated. CONSTITUTION:Forming material is fed to a primary sieve 14 through the storing tank 12 receiving the forming material composed of the collected dust powder of urea resin packed in a flexible container 11 and a constant volume- discharging machine 13. Then after roughly granulated objects have been removed, the forming material is kneaded and extruded. A producing device is composed of the two axis-kneading and extruding machine 16 provided with the hopper 15 with a pushing mechanism, the crusher 17 crushing extrudate, the dryer 18 which cures the crushed and pelletized formed object to prescribed hardness and a secondary sieve 19 which collects the product of prescribed grain size. |
