There are many factors that affect the quality of cast iron craft.
The first to have a reasonable casting process. According to the casting structure, weight and size, casting alloy characteristics and production conditions, select the appropriate sub-surface and shape, core method, reasonably set the casting tendons, cold iron, riser and pouring system.
The second is the cast iron design process. When designing, It is also necessary to consider the rationality of the design from the viewpoint of casting alloy and casting process characteristics, that is , the size effect and solidification, shrinkage, stress and other issues, to avoid or reduce deformation, cracking and other defects of cast iron craft.
The third is the quality of raw materials for casting. Metal inclusions, refractories, fuels, fluxes, modifiers and foundry sand use qualified products, to avoid affecting cast iron appearance quality and internal quality.
The fourth is the process operation, develop a reasonable process of operation procedures to improve the technical level of workers, so that the correct implementation of the rules.