1. In plastic die stamping, it is also the most commonly used method to separate the product from the die; 2. Hard alloy high-speed steel punches, such as tungsten steel punches, can be used to pass through longer and thinner holes; 3. The punch is also called the center. It is a conical metal round bar with head assembled on lathe or grinder, which is used to support the workpiece and make it rotate around it, but it is completely different from the punch of plastic parts. 4. The plastic punch can also be used in the mold, which can play a stabilizing role, and is called the pin. The types of plastic punch are: flat punch, round punch, needle seat, standard punch, non-standard punch and so on.