| 摘要 |
PURPOSE:To prevent the cracking and abrasion of annular projections and to improve the service life of longitudinal cutting rolls by providing injection pipes for cooling water which inject water toward the annular projections of said rolls in proximity to said projections. CONSTITUTION:Pressurized water is supplied to the upper or lower parts in the circumferential directions of the annular projections 1 in the cylindrical parts of upper, lower rolls 2, 3 for longitudinal cutting from cooling water pipings 5 having plural nozzles 6 within the range where the working in the circumferential directions of the rolls 2, 3 is not interfered. The pipes 5 are synchronized with the movements of the rolls 2, 3. The similar method is also adaptable to rolls which are divided to >=3 parts, thus the rate of abrasion and cracks of the projections 1 are minimized. |
