Application of Compound Technology to Precision Casting for Motor in Investment Casting
Li Haishu (Dongfeng Investment Casting Co., Ltd., Shiyan, China)
Surface roughness and dimensional accuracy reach up to Ra 6.3～3.2 and CT6 ～ CT5 respectively for the casting obtained by compound casting process substitutive for conventional process based on analysis of wax pattern making and shell making process in investment casting. At present, the developed compound technology has been used for over 69 kinds of precision castings free from machining in investment casting. Developed compound technology contained the adjustment of wax-ethyl silicate pattern component, increase in the pressure for wax pressurization and use of silicate sol-sodium silicate compound technology for mold shell making.
【CateGory Index】： TG249.5