In order to solve the problem of contact and separation between the copper tube and the cooled green shell during the working process, the copper tube of the die is still a square or rectangular copper tube with one side bent, the inner cavity of the copper tube is conical from the upper opening to the lower opening, and the inner cavity of the copper tube is conical, segmented double conical or triple conical or multi conical, or parabolic inner cavity from the upper opening to the lower opening, The upper or upper taper is greater than the lower or lower taper. Preferably, the taper of the straight surface is greater than that of the arc surface. In the working process, the air gap between the green shell and the inner wall of the copper pipe is avoided, which is more in line with the change law of green shell shrinkage.
 

1. Design principle of inner cavity shape of mold copper tube of high-efficiency billet caster
According to the solidification characteristics of continuous casting billet, the inner cavity shape of mold copper tube of high-efficiency billet caster was designed. Two problems are mainly considered: one is the thermal deformation of mold copper pipe near the meniscus due to high heat flux and heat concentration. The second is shell shrinkage during solidification. The design principle is to make the shape of the inner cavity of the die copper pipe consistent with the shrinkage law of the solidified shell, so as to reduce the air gap thermal resistance.
2. Main characteristics of copper pipe material for high efficiency continuous casting mold
High efficiency continuous casting requires good thermal conductivity, high recrystallization temperature, thermal fatigue resistance, high strength, good wear resistance and long service life. The main characteristic of high efficiency continuous casting mold copper pipe material is that the comprehensive performance of copper pipe material is the best.continuous casting mold material are good thermal conductivity, high recrystallization temperature, thermal fatigue resistance, high strength, good wear resistance and long service life. The main feature of high-efficiency continuous casting mold copper pipe material is that the comprehensive performance of copper pipe material is the best.