(1) the reasonable mold design. In progressive die, it is possible to affect the accuracy of stamping parts. In view of the small parts of the stamping parts, the general arrangement of the larger area of blanking, and then arrange a smaller area of punching and cutting, in order to reduce the impact of punching force on the stamping parts.

(2) press materials. To overcome the traditional mold structure design, the stripper plate a material containing space (i.e. when the mold is closed, the stripper plate and the die bonding, the gap at the stripper plate and the material receiving die for the material thickness of t-0.03 ~ 0.05mm).So, the stripper plate smooth motion stamping, and the material can be pressed. The key part of forming, a stripper plate made of insert structure, convenient to solve long time stamping parts caused by pressing the stripper plate mill (pressure) loss, and no compression materials.

(3) additional force function. In order to increase the pressure on the side of the concave die, the pressure of the side material of the concave die is increased, and the blanking and twisting deformation of the stamping part is suppressed by the thickening dimension of the pressing part of the unloading insert block (H+0.03mm).