The accuracy of the mold should be high, mainly reflected in the improvement of the mold precision by the mold processing technology, and secondly, the accuracy of the punch also affects the accuracy of the product.

The mold worker should be professional, the mold worker's control of the mold accuracy and algorithm will also affect the one-time pass rate of the mold. The key dimensions of many precision molds are not allowed to have a slope, but the tolerance zone and a small slope will be fully used in mold manufacturing, such as gear installation column. When building a digital model, we must pay attention to the adjustment of tolerance. Generally, the 3D model provided by customers is useless, because many of its dimensions are the limit dimensions. If we design the mold according to this, the produced mold will basically be scrapped.