| 摘要 |
PROBLEM TO BE SOLVED: To crush waste materials into a predetermined shape and size efficiently and stably, upon re-use of waste materials (raw materials) such as crushed insulators assuming a high-volume production.SOLUTION: A raw material crushing apparatus includes an outer cone 21, an inner cone 22 disposed in the outer cone 21, and a drive unit 40 for rotating the inner cone 22. In the apparatus, the raw materials are made to pass through a gap formed between the outer cone 21 and the inner cone 22, and crushed. The gap includes a first crushing gap 30b, and a second crushing gap 30c which is bent in the radially outward direction or in the radially inward direction of the inner cone 22 with respect to the first crushing gap 30b, and communicates with the first crushing gap 30b. |
