轧环机下箱体,材质HT 250,重9 500 kg,轮廓尺寸4 100 mm×2 500 mm×577 mm,干砂型,冲天炉熔炼。运用均衡凝固模数法设计补缩式顶注雨淋浇注系统,以大孔出流作充填校核。采用2个浇包同时浇注,2套独立对称的浇注系统,设计结果为:直浇道φ80 mm,横浇道56/60 mm×50 mm,18只内浇道φ18 mm,浇注温度1 320~1 380℃。浇注出的铸件形状完整,机加后没有缩孔、缩松、夹渣、气孔等缺陷,工艺出品率93%。表明均衡凝固模数法设计补缩式浇注系统是实用的。 Ring under the box machine, material HT 250, weight 9 500 kg, profile size 4 100 mm × 2 500 mm × 577 mm, dry sand, cupola smelting. Using the method of equilibrium solidification modulo design, the retractable top-pouring rain pouring system is designed to check the filling of large holes. The results of the design are as follows: the sprue φ80 mm, the runner 56/60 mm × 50 mm, the 18 implants φ18 mm, the pouring temperature 1320 ~ 1 380 ° C. Casting castings complete shape, machined no shrinkage, shrinkage, slag, porosity and other defects, craft production rate of 93%. It shows that it is practicable to design a retractable pouring system by the method of equilibrium solidification modulus.