垂直线生产的可锻铸铁管件夹渣缺陷分析

Analysis on Slag inclusion Defects of Malleable Cast Iron Pipes Produced in Vertical Molding Line

采用垂直造型线生产可锻铸铁管件已成为可锻铸铁行业主要生产方式。自引进迪砂垂直线后,可锻铸铁管件的夹渣缺陷是阻碍其正常生产的主要原因。经反复试验,查找管件夹渣缺陷产生的原因,研究改进措施,最终摸索出一套成功的方案,即改进垂直浇注系统,增加各种集渣、挡渣结构等。结果表明,管件的夹渣率由20%降至3%以下,夹渣废品率由10%降至0.5%以下,达到了管件批量生产要求。

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.