Structural characteristics and forming process of progressive die

The structural characteristics of the progressive die: 　　1, the mold is composed of an upper mold, a lower mold and a mold sleeve, and is guided by a guide post; 　2, the upper mold has an upper mold fixed plate equipped with a punch and a screw is connected to the upper template; 3. Insert two semi-conical concave molds into the concave mold sleeve with tapered holes, with cavity holes in the middle, and two semi-circular concave molds for positioning by two positioning pins; 　　 4. The lower mold is fixed by the lower mold The plate is composed of a core and another core; 　　5. The unloading part is composed of ejector rods and ejector pads. After the parts are formed, the upper mold is first opened with a special unloading work, and then the ejector rod is used to pry the upper mold. The two semi-cone concave molds are pushed out of the mold, and the product can be taken out by separating the progressive mold.　　Progressive mold molding process: 　　1. In the preparation stage, after weighing the plastic powder, first pour it into the feeding chamber and heat it to a plastic state. In the pressure stage, when the pressure column moves down on the worktable on the hydraulic press, it enters the feeding chamber to pressure the molten plastic, and injects it into the cavity at high speed through the gating system of the mold. After a certain period of time, it is guaranteed to be insulated and hardened.　　2. In the unloading stage, after the mold is opened, use the special unloading mechanism to eject the plastic parts, and clean the mold cavity, the feeding chamber and the runner, and prepare for the next stroke of extrusion.