The first is the design process of copper casting.
In order to avoid or reduce the component segregation, deformation, cracking and other defects of copper castings, the rationality of design must be considered from the perspective of casting alloy and casting process characteristics, i.e. obvious size effect and solidification, shrinkage, stress and other issues, in addition to the determination of geometrical shape and size of parts according to working conditions and metal material properties.
The second is to have a reasonable casting process.
According to the structure, weight and size of the copper casting, the characteristics of the casting alloy and the production conditions, the proper parting surface, molding and core making methods are selected, and the casting reinforcement, chill, riser and pouring system are reasonably set. To ensure the quality of castings.
The third is the quality of raw materials for casting.
The quality of metal furnace burden, refractory material, fuel, flux, modifier, casting sand, molding sand binder, coating and other materials are not up to standard, which will cause defects such as porosity, pinhole, slag inclusion, sand sticking, etc. in the casting, which will affect the appearance quality and internal quality of the copper casting. In serious cases, the casting will be scrapped.
The fourth is process operation.
It is necessary to formulate reasonable process operation procedures, improve the technical level of workers, and make the process procedures correctly implemented.