Application of Wet Sand Mixed with Inorganic Binder in Hot Box Core-shooting Process
Author of the article:CHENG Nan;CHEN Qun
Author's Workplace：Zhengzhou Molding Sand Technology and Materials Research Institute Co.,Ltd.,Zhengzhou450000,China;HenanQuannaiyuan New Materials Technology Co.,Ltd.,zhengzhou450000,China
Key Words：inorganic binder hot box process sand core performance
Abstract：
The inorganic binder was applied to the hot core box core making process.The results show that the sand core not only has good immediate hot tensile strength and room temperature tensile strength,but also has a residual strength of 0.3 MPa at 1 000℃.The core has good collapsibility.The air generating capacity of sand core at 800℃is 3 mL/g,and the service time of wet sand seal can exceed 24 h.During pouring,no poisonous and harmful gases are produced,which can effectively improve the working environment.The dimensional accuracy and surface roughness of castings obtained by pouring can meet the technological requirements.
