Generally, we can divide the stamping die into two parts, namely, the engineering mold and the progressive die.

Engineering dies can be divided into composite dies, drawing dies, riveting dies and so on, the following is a brief introduction to the structure and role of these dies;

Engineering die: also known as "single process die", refers to a stamping stroke, can only complete a stamping process of the die. After the project is finished, the product needs to be manually or mechanically removed from the mold, and then put into the next station mold to continue production, until the last working procedure of the mold finished, the entire product is not completed. This kind of mold is easy to maintain, but it is time-consuming and labor-intensive to produce. It needs more labor and time costs, and the rejection rate of the product is higher.

Compound die: Common compound die structure has compound blanking, compound drawing and so on, this die structure and other engineering die structure is slightly different. The punch (also known as the common die or punch) is designed in the lower die, the other several templates are lower splint (fixed punch), lower stop baffle and lower stripper (outer stripping), the upper die in turn is the master die (or knife edge), inner stripper and upper pad, the inner stripping using the same height sleeve hanging on the upper pad, and then using a punch or spring to top. For example, the compound die used for blanking, its internal demolition generally out of the master die 0.50 mm can be, can not be lower than the master die, otherwise the master die knife edge is easy to collapse or not stripping. The internal detachment force must be strong enough to eject the product from the master mold. Generally, if the material is thicker, we have nitrogen springs installed on it.

Continuous die: also known as "progressive die", refers to a stamping stroke in the process, in different workstations at the same time to complete two or more stamping processes of the mold, this mold maintenance is more difficult, the need for experienced fitters to operate, but the production efficiency is very high, play fast if a small It can produce thousands of products, save labor and time cost, and lower product rejection rate.