| 摘要 |
PROBLEM TO BE SOLVED: To provide a crusher capable of obtaining evenly uniform powder, and to provide especially a groove shape on a mortar of the crusher.SOLUTION: A crusher constituted of a circular upper mortar 1 fixed downward, a circular lower mortar 2 rotating upward, and driving means for rotating the lower mortar, is provided with a plurality of continuous concavo-convex grinding parts 3a, 3b, 4a, 4b respectively on the upper mortar and the lower mortar, and also is provided with a circular planar recessed part 4c on the lower mortar.SELECTED DRAWING: Figure 6 |
