我厂生产的熔模铸件多是拖拉机配件，批量较大，必须准备多套金属压型。过去制作金属压型时采用的是机械加工和手工刻研的方法，制作麻烦，费工费力，造价昂贵，不能适应多快好省地发展生产的需要。 I plant the investment casting is mostly tractor parts, larger, you must prepare more sets of metal pressure type. In the past, metal stamping used mechanical and manual methods, making troubles, laborious and expensive, and could not meet the needs of developing production faster, better and more economically.