改善天然湿型砂混砂过程中结团现象的研究

摘要

The agglomeration occurring in the green sand mixing was effectively reduced by adding an additive YZ-1 and changing the watering sequence.The results indicate that the compression strength of green sand increased with the increasing of addition YZ-1 lubricant when the addition amount is less critical value; with the increase of YZ-1 lubricant, the compression strength reaches a peak value, then the compression strength decreases till cannot satisfy requirement of mold making.By adding YZ-1 lubricant and changing the watering sequence, the cluster phenomenon can be solved better.%通过加入YZ-1型润滑剂和改变加水顺序等措施,可以有效改善湿型砂混砂过程中的结团现象.当YZ-1型润滑剂加入量比较少时,可以在一定程度上提高湿型砂的抗压强度；当YZ-1型润滑剂含量继续增加时,湿型砂抗压强度又会逐渐降低直至无法造型.采用原砂先加水后加粘土的工艺比传统的原砂先加土后加水的工艺,型砂的强度更高、结团度更低.对加过YZ-1型润滑剂的湿型砂再重新混制反复多次,抗压强度提高,结团度基本不变.