Four factors affecting copper castings:
The first is the design of copper castings. When designing, in addition to determining the geometry and size of the part according to the working conditions and metal material properties, the rationality of the design must be considered from the perspective of casting alloy and casting process characteristics, that is, obvious size effects and solidification and shrinkage , Stress and other problems to avoid or reduce the occurrence of defects such as segregation, deformation and cracking of copper castings.
The second is to have a reasonable casting process. That is, according to the structure, weight and size of copper castings, the characteristics of casting alloys and production conditions, the appropriate parting surface and modeling, core making methods are selected, and the casting ribs, cold irons, feeders, and pouring systems are reasonably set. To ensure the quality of castings.
The third is the quality of the raw materials for casting. The quality of metal charge, refractory, fuel, flux, modifier, and foundry sand, molding sand binder, coating and other materials are not up to standard, which will cause defects such as pores, pinholes, slag inclusion, and sand sticking in the casting, affecting the appearance of copper castings The quality and internal quality will cause castings to be scrapped when serious.
The fourth is process operation. It is necessary to formulate reasonable process operating procedures, improve the technical level of workers, and enable process procedures to be correctly implemented.
