The mold is simple 2-plate mold structure, but because it is a puzzle product, there are a lot of small parts, the positions between parts and the pouring points are very skillful, if the arrangement is not good, there will be flash problems, air trap problem. Products are ejected out by pins. There are many ejectors in this mold, so ejector balance of ejector plate is very important. The most characteristic is that the mold runner is also a part of the product, is the product frame and fixed base.