| 摘要 |
PURPOSE:To carry out crushing with high efficiency by sliding a grinding tool for grinding a roll surface on the roll surface in the width direction of diameter extension crossing rectangularly in the roll moving direction and moving said tool reciprocally in the axial direction of roll. CONSTITUTION:A base fed from above is crushed between a couple of rolls 2 and 3 facing each other and rotating facing inwardly, and at least the roll 2 is set to be able to make contact or separate with from the another roll 3. A grinding tool 43 for grinding the surface of the roll 2 is set slidably in touch with the surface of the roll 2 in the width direction of diameter D extension crossing rectangularly in the movable direction of the roll 2 and also movable reciprocally in the axial direction of the roll 2. As a result, crushing can be carried out with high efficiency at low cost. |
