我厂在生产转子Ⅱ型及SP_3型混凝土喷射机铸铁件车轮、减速箱轮芯、以及其他矿山机械轮盘类铸铁件时,不论是干模造型还是潮模造型,需要采用竖立泥芯,过去均按一般工艺规定的方法,采用单芯头定位或双芯头定位。这两种定位方法,我们在生产实践中证明,均存在不同的问题和局限性。单芯头定位只适合于稳定度较大的粗短泥芯,一般适用于高度h<120毫米、直径D>80毫米的泥芯。对于高度h>120毫米、直径D< I plant in the production of rotor type Ⅱ and SP_3 concrete cast iron cast iron wheels, gear boxes and other gear wheels, and other pieces of mining machinery cast iron wheels, whether it is dry-type or tide model modeling, the need to use the erected mud core, the past According to the provisions of the general process method, the use of single-core positioning or dual-head positioning. These two positioning methods, we have proved in the production practice, there are different problems and limitations. Single-core positioning is only suitable for large stubborn stubs, generally suitable for mud cores of height h <120 mm and diameter D> 80 mm. For height h> 120 mm, diameter D <