| 摘要 |
PROBLEM TO BE SOLVED: To provide an impact type crusher controlling the generation of fine powder, and suitable for manufacturing a phenol resin molding material and the like. SOLUTION: In the constitution of this crusher, matter to be crushed is crushed by intermeshing a plurality of projected square pillarlike protrusions 4 formed on a rotating table 5 in a crushing chamber 2 with a plurality of pillarlike protrusions 6 formed on a fixed table 7 of an opening and closing door. In this case, a plurality of projected square pillarlike protrusion 4 are disposed on a plurality of lines in the concentric circle radial shape on the rotating table 5, and the height of protrusions 44 disposed on the outermost peripheral line is set to be 1/2-2/3 of the height of the square pillar-shaped protrusions 4 disposed on other peripheral lines. Also the number of the square pillarlike protrusions 44 on the outermost peripheral line is set to be half or less of the number of protrusions on the peripheral line which is on the line inner side of the outermost line. |
