水玻璃法熔腊精密铸造(以下简称精密精造)目前国外已得到广泛的使用.用此法可以铸造出任何形状的零件,而大部分零件的表面是不留机械加工余量的,只是在尺寸和精度方面要求较高的个别零件表面上,留有极小的加工余量.精密铸造做出来的铸件表面光洁度一般 Water glass melting wax casting (hereinafter referred to as precision) has been widely used abroad. With this method can cast any shape of the parts, and most parts of the surface is left without machining allowance, but in The size and precision of the individual parts require a higher surface, leaving a minimal allowance casting casting surface finish made by the general