| 摘要 |
PURPOSE:To perfectly remove cutting slag at cutting-through face of casting slab by arranging a water-cooling type backing body, having slant face toward outside at just below the cutting-through face of the casting slab, as abutting on the casting slab and injecting compressed air as interlocking with horizontal shift of a torch. CONSTITUTION:When the casting slab 1, shifted to vertical direction, is cut by gas toward horizontal direction, the water-cooling type backing body 2, having slant face (a) toward outside is abutted on the casting slab 1, at just below the cutting-through face of the casting slab 1 and interlocked with the gas cutting torch 3. And, a nozzle 4 for compressed air injection is interlocked with the torch 3 to inject the compressed air, while shifting. Further, slang angle of the slant face (a) for the water-cooling type backing body is about 15-60 deg. and pressure of the compressed air is about 2-10kg/cm<2>. In this way, the cutting slag of the casting slab 1 is flowed down along the slang face (a) finely and is perfectly removed together with by using the compressed air.
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