Investment casting is among the more common investment casting, also known as the lost wax casting: choose appropriate casting material system, such as paraffin wax casting;Touch on casting refractory coating and sand and refractory process, sclerosis type shell and dry;Then the internal casting melt away, get the cavity;Roasting shell in order to obtain enough strength, and the casting material, burning residual;Casting need metal materials;After shelling solidification cooling, deoxidization, can achieve the high investment finished products.According to the requirements of the product or heat treatment and cold working and surface treatment. 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 investment molding production lines, core making method can be used: cold core box, hot core box, shell core efficient core method, etc.