| 摘要 |
PURPOSE:To prevent leakage of a molten from the end of a billet and to cast stably the billet by controlling the heating areas in the upper part of stationary gates pressed to both end faces of two water-cooling rolls and the cooling areas in the lower part according to the thickness of the billet and the radius of the water-cooling rolls. CONSTITUTION:The upper parts of the refractory materials 7 on the front surfaces of stationary gates 2, 2' are heated to a high temp. by electric heaters 8 at the rear side and the lower parts are cooled by the cooling water passing through the inside of water cooling chillers 9 at the rear side. When a molten metal 4 is poured into the space formed of water cooling rolls 1, 1' and the gates 2, 2', the molten metal 4 is cooled by the rolls 1, 1' to form a billet 3. The position of the chillers 9 in the lower parts of the stationary gates is so controlled as to have the distance (l) satisfying the equation I where the distance between the neutral point of the water cooling rolls and the top end of the chillers 9 is designated as l(mm.), the radius of the casting rolls as R(mm.) and the thickness of the billet as t(mm.) thereby controlling the formation of the solidified metal on the wall surfaces of the stationary gates. |
