International Journal of Mechanical Engineering

In the sand casting process of large castings, due to the shrinkage effect of materials, problems such as size errors and surface defects often occur, which affect the quality and performance of the castings. The main reasons for shrinkage defects include the characteristics of casting materials, casting process parameters, cooling process, and other factors. To reduce these defects, it is necessary to conduct a thorough analysis of the key factors affecting shrinkage and adopt effective control methods. This article explores the causes of shrinkage defects in the sand casting process of large castings, analyzes the influence of different factors on shrinkage defects, and proposes corresponding control measures, such as optimizing sand mold formula, improving cooling system, adjusting process parameters, etc. Comprehensive optimization of casting processes can effectively reduce shrinkage defects, improve the quality and yield of castings.

Large castings; Sand casting; Shrinkage defects; Cause analysis; Control method