一、前言: 用钢板焊接或铸造等传统方法制作汽车车身模具,需用大型复杂设备,模具制造周期长,成本高。由于上述原因,使汽车覆盖件成形模的制造比较困难。尤其对于一些中、小型汽车制造厂,这个问题就显得更为突出。目前,由于锌基合金模的应用和推广,使这个问题得到一些简化。但由于锌基合金模具制造时存在收缩,变形和排气等技术问题,因而多数用在中、小型模具上。 大型锌基合金模具,一般其工艺过程是:先用木料或混用石膏制作凸模模型,再使用模 First, the foreword: The steel plate welding or casting and other traditional methods of making auto body mold, the need for large complex equipment, mold manufacturing cycle length, high cost. For the above reasons, it is difficult to manufacture automobile cover forming dies. Especially for some medium and small car manufacturers, the problem becomes even more prominent. At present, due to the application and promotion of zinc-based alloy mold, this problem is somewhat simplified. However, zinc-based alloy mold manufacturing there are shrinkage, deformation and exhaust and other technical problems, so most used in medium and small molds. Large-scale zinc-based alloy mold, the general process is: first with wood or mixed plaster cast model, and then use the mold