2.7中间箱体在东久生产线上生产的工艺优化

Process Optimization of 2.7 Middle Box Produced on TOKO Line

介绍了2.7中间箱体在东久线生产存在的砂型成型不良以及型腔气体无法排除而产生粘砂问题。通过在模具型板厚度方向设置排气孔,提高了射砂阴影部位砂型填充紧实度,还提高了铸件的成品率;利用4个浇道棒的位置,选择其中合适的一个位置设置排气通道来降低型腔压力,铸件粘砂比例由15.06%下降到1.04%,有效解决了铸件的粘砂问题;通过改进射砂时的排气和浇注时的型腔排气,弥补了东久造型线弊端,提高了东久线产品工艺适应性。

An introduction was made on the problems existing when producing 2.7 middle box on TOKO line,including:sand mold was not good formed,gas in mold cavity couldn't be removed and caused sand burning-on defect.Through setting venting holes at the pattern plate thickness direction,the mold packing degree in the shooting shadow area was increased,and also elevated the casting qualified rate.By using positions of 4 gating bars,choosing one of them suitable to set venting channel to reduce mold cavity pressure,the casting burning-on defect ratio decreased from 15.06%to 1.04%,effectively solved sand burning-on problem of casting.Through improving air venting during sand shooting and gas venting of mold cavity during pouring,the disadvantage of TOKO line was remedied,increase product process adaptability of TOKO line.