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在精密铸造生产中,使用制壳机械对于解决涂料质量、降低劳动强度和提高生产率是很有效的,也是很有必要的。MZ384自动制壳机的优点是:占地面积小(仅占地26米~2);投资省;采用工艺较先进,自动程序控制,操作人员1～2人;安装、操作、维修均较方便。我厂于1982年安装了一台MZ384自动制壳机,该机采用氯化铵饱和水溶液高温快速硬化,硬化后即进行热风干燥。由于各地所用制壳材料不同,对于硬化所需时间也有不同要求。我们在手工制壳时采用石英型高强度模壳,面层涂料由水玻璃(模数3～3.2、比重1.3～1.35)50％,石英粉(270目)50％,另加洗净剂0.1～0.2和微量的正辛醇组成,过渡层涂料由水玻璃50％,石英粉25～30％,陶土
In the production of precision casting, the use of shell making machinery is very effective and necessary for solving the problems of paint quality, labor intensity and productivity. MZ384 automatic shell making machine has the advantages of small area (only occupying an area of 26m ~ 2), investment, advanced technology and automatic program control with 1 ~ 2 operators, convenient for installation, operation and maintenance . I plant in 1982 installed a MZ384 automatic shell making machine, the machine uses ammonium chloride saturated aqueous solution quickly hardened at high temperature, after hardening, hot air drying. Due to the different shell materials used throughout, there are different requirements for the time required for hardening. We use hand-made shell quartz high-strength shell, the surface coating from water glass (modulus 3 to 3.2, the proportion of 1.3 to 1.35) 50%, quartz powder (270 mesh) 50%, plus detergent 0.1 ~ 0.2 and a trace of n-octanol composition, the transition layer coating from water glass 50%, 25 ~ 30% quartz powder, clay