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1．雨淋式浇注系统的特点及选用原则雨淋式浇注系统可使铸件顺序凝固,有利于铸件的补缩,能防止铸件产生缩孔、冷隔、夹渣以及浇不足等缺陷,同时还可以防止由于冲砂而引起的夹砂、气孔和渣孔等缺陷。因此,对于机械加工要求较高的零件,以及对表面质量要求高而不经加工就使用的零件,应采用雨淋式浇注系统。我厂一部分铸铁件,如起重机的卷筒、钢锭模以及减速器轮毂等,均采用雨淋式浇注系统,质量良好。
1. Rain pouring system features and selection principles Rain pouring system allows the order of solidification of castings is conducive to the casting of shrinkage, to prevent the casting shrinkage, cold, slag and insufficient pouring defects, but also can prevent Due to sand and sand caused by sand, porosity and slag holes and other defects. Therefore, for machining parts require higher, as well as the surface quality requirements without processing parts should be used rain pouring system. Cast iron parts of our factory, such as the crane drum, ingot mold and reducer hub, are used rain pouring system, good quality.