Copper pipe is core equipment of continuous filling machine. It can quickly crystallize high-temperature liquid steel to form steel castings. Electromagnetic induction stirring, copper mold cooling water, and then pull out the casting, and divide the workpiece into specified lengths through flame cutter (torch cutter). Steel is directly cast into the copper pipe of the mold, and the copper pipe is continuously cooled to form a blank. In order to solve this problem, the copper pipe is in contact with the shell of the cooling blank during operation, and the separation time is shortened, The die copper pipe is still inclined in a curve to the direction of square or rectangular copper tube. The copper pipe in the cavity has a cone, and the distance between the wellhead and the wellhead is low. In the copper tube, from top to bottom, the cavity is a double cone, three or more cones or paraboloid resonators. The shape of the cone at the top or top is larger than that at the bottom or bottom. The taper of the surface is better. During operation, the air gap between the workpiece shell and the inner wall of the copper pipe is avoided, which is more in line with the shrinkage law of the blank sleeve