长春机车工厂自1960年起采用离心铸造,生产各种型号的蒸汽机车汽缸套、汽室套及涨圈等,铸件最大尺寸为φ710×φ650×2280毫米;最小尺寸为φ305×φ255×2280毫米。由于型砂粘度大,捣实又紧,致使起模困难,起初曾用吊车将滚筒模和芯子一起吊起,用大锤敲打滚筒模外壳和芯子,结果不仅费力而且滚筒模外壳被敲得凸凹不平。后来学习了兄弟单位经验,设计制造了利用十吨吊车牵引动滑轮组拔模力 Changchun locomotive factory since 1960 using centrifugal casting, production of various types of steam locomotive cylinder liner, steam chamber cover and up ring, casting the largest size of φ710 × φ650 × 2280 mm; the smallest size of φ305 × φ255 × 2280 mm. Due to the high viscosity sand, tamping and tight, resulting in difficulties in starting die, the original crane has been used to lift the drum with the core mode, with a sledgehammer knocking drum mold shell and core, the result is not only laborious and drum mold shell was knocked Bumpy. Later learned the experience of the brothers unit, the design and manufacture of the use of ten tons of crane traction pulley block pulling force