Analysis on Slag inclusion Defects of Malleable Cast Iron Pipes Produced in Vertical Molding Line
Author of the article:AI Chenguang;ZHANG Xiaojuan;YUAN Shaoqiang
Author's Workplace：Hebei Jianzhi Casting Group Co.,Ltd.,Tangshan 064100,China;Key Lab of Intelligent Equipment Digital Design and Process Simulation,Tangshan University,Tangshan 063000,China
Key Words：gating system gating end well and extension for slag collection slag collection parts
Abstract：Production of malleable cast iron pipe by vertical molding line has become the main production mode in malleable cast iron industry. Slag inclusion defect of malleable cast iron pipe is the main reason hindering its normal production after the introduction of DISA vertical line. Through repeated tests, the causes of slag inclusion defects in pipe fittings were found, and improvement measures were studied. Finally, a successful scheme was found, that is, the vertical gating system was improved, and various slag collection and slag retaining structures were added. The results show that the slag inclusion rate of pipe fittings decreases from 20% to less than 3%, and the slag rejection rate decreases from 10% to less than 0.5%, which meets the requirements of pipe fittings mass production.
