我厂铸铁车间生产的某筒体铸件,其浇注系统(为顶注雨淋浇口)以前都是与铸件本体同一铸型,采用表面干燥砂型,每一铸件制作一副浇口。由于生产批量大,需耗用大量型砂和造型工时,生产周期长,经济效益不高。在不改变其工艺方案的前提下,将浇注系统改为成型耐火砖,明浇后一模多铸,收到了满意的效果。制造过程如下:在原砂型浇口铸造质量稳定的前 Casting plant in our factory cast a cylinder, the casting system (for the top pouring rain gate) are the same casting body with the previous cast, the use of dry sand surface, each casting a gate. Due to the large production volume, a large amount of molding sand and molding work hours are required, the production period is long, and the economic benefits are not high. Under the premise of not changing the process plan, the pouring system was changed into a shaped refractory brick, which was cast in a mold after pouring and received satisfactory results. Manufacturing process is as follows: In the original sand gate casting quality and stability before