Plastic injection molds mainly include gating, ejection, guide, positioning, and inserts. Generally, the outer guide plate, guide pillar, and guide sleeve of a plastic injection mold should be frequently worn. When the mold is pressed tightly, the rotating position of the connecting moving mold is damaged, and the mold cannot be repaired. When the mold cannot be designed, overloading protects the mold and molded parts from damage. However, when the parts of a plastic injection mold are damaged and have a short repair life, extrusion and extrusion accidents occur, and other parts can be repaired if damaged or worn. The surface of plastic parts that have been used in plastic injection molds for a long time will not be damaged due to corrosion resistance and long-term friction damage. The surface of plastic fusion parts will not be damaged, and defects will appear on the smooth surface of the plastic parts. After long-term friction and wear, the surface of the plastic parts will restore its original appearance, and the surface of the plastic parts will have no new luster, only the surface of the plastic parts. 3. The original cracks or cracks of plastic parts that have been used for a long time, such as too small a mold release angle or too thick a cross section on the surface of the plastic parts, sand pits embedded in the surface of the plastic parts, excessive cracks caused by movement of the surface of the plastic parts along the mold opening and parting surface of the material base, or excessive cracks caused by grinding gaps after mold opening, or cracks caused by movement of the surface of the plastic parts along the mold opening and parting surface of the material base, or due to trimming or mold opening errors after mold opening.
For high gloss molds with complex cavities, the mold repair time is usually 2-3 minutes, while the molding cycle is 13-20 minutes. If less mold repair time is used, it takes 12-15 minutes, while the molding cycle is usually 1-3 minutes. In recent years, the mold industry has developed rapidly and has a wide scale, forming two major systems, namely, the synchronous promotion of mold design and development and the synchronous promotion of mold product design. It can be seen that the development of mold has great significance. Starting in 1983, after several years in China's mold industry, mold enterprises have completely shaken off the dependence on manual workshops, thereby demonstrating their competitiveness as independent sites. At present, China's mold production value, mold standard parts production value, and total exports have maintained an average annual level< eod>。