Take the sand mold casting, mass production of the factory should create conditions for the modelling of advanced technology, core making method.Old jar type or shock squeeze moulding machine production line productivity is not high, workers labor intensity, large noise, not adapt to the requirement of mass production, shall be modified step by step.For small castings, can use horizontal parting or vertical parting flaskless high pressure molding machine production line straight type, solid modeling and production efficiency is high, covers an area of less;For the thing that can be used in various cases of high pressure molding machine production lines, air impact molding line, in order to adapt to the requirement of fast, high precision molding production lines, core making method can be used: cold core box, hot core box, shell core efficient core method, and medium batch of large castings can consider applications self-hardening resin sand molding and core making.Precision casting sheet small batch production of heavy castings, manual modeling is still important, the method of manual can meet the requirements of various complex is more flexible, does not require a lot of process equipment.Can be used sodium silicate sand, sodium silicate sand mold VRH law, organic ester sodium silicate self-hardening sand, clay self-hardening sand mould and dry type, resin cement sand mold, etc.;Made for single piece of heavy castings, pit modelling method of low cost, fast production.Batch production or long-term production of stereotypes products box, split box shape modelling method is good, although high mould and sand box to start investing, but from compensated save modelling cycle time, improve the quality of its products.