目前铸造生产中,广泛应用铸铁整铸式砂箱,这种砂箱特点是简单易行,成本比较低。但对于长、宽、高三个方向尺寸较大,而中间根挡高度又较小的这一类型砂箱,由于转角受到三个方向阻碍,很容易形成裂纹。我厂在铸造B2016A立柱砂箱时,内相尺寸3740mm×2115mm ×560mm,横挡高度却只有 90mm。应用如图转角防裂新形式,四周转角下四片坭 Casting production, widely used cast iron casting sand box, this sand box is characterized by simple, low cost. But for the length, width and height of the three directions larger size, and the middle of the root block height and smaller this type of sand box, due to the corner by three obstacles, it is easy to form cracks. I plant casting B2016A column sand box, the internal size of 3740mm × 2115mm × 560mm, the height of the block is only 90mm. Application Figure corner crack new form, surrounded by four corners 坭