Precision casting according to the requirements of the product, or for heat treatment and cold working and surface treatment.Such as sand 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 type high pressure molding machine production line, 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, etc.