Sand core mould structure of engine cylinder block

The utility model discloses a sand core mould structure of an engine cylinder block as well as a modeling process. The mould structure comprises a main core of the engine cylinder block consisting of a cylinder barrel, an axle seat and an oil pan, wherein the axle seat consists of an axle seat core and a primary core matched and combined with the axle seat core. The split structure of the structure provided by the utility model facilitates standardized processing and modeling of the main core of the engine cylinder block. The abnormal face in a special structure is independently processed, so that the structure is more precise and high in efficiency during integral modeling and processing. The main core of the abnormal face during modeling and processing is prepared twice. When the core is prepared in the second time, the mould is still partitioned from the central line of the cylinder barrel, and the main core with the abnormal face is taken as an integral core. The primary core is the mould part during moul