挂砂冷铁芯顾名思意就是在冷铁表面挂一层芯砂的型芯。它主要是应用在一些体高、壁厚、内径较小的中小型套筒类铸件中,有助于解决铸件内壁皮下组织缩松和局部缩孔现象,并能在一定程度上提高铸件组织的致密性。我厂生产的铸铁件复泵变向阀室下套、蒸汽机车上热 Hanging sand cold core as the name suggests is hanging on the surface of a layer of cold iron core sand core. It is mainly used in a number of small, medium-sized sleeve castings with body height, wall thickness and inner diameter, which can help to solve the problem of shrinkage and shrinkage of subcutaneous tissue in the inner wall of castings and can improve the compactness of the castings to a certain extent Sex. I plant the production of iron pieces of complex pump valve chamber under the cover, steam locomotive on the heat