In the plastic molding process, due to the characteristics of the molding process, the internal stress of the injection molded parts inevitably exists, but proper control of the process conditions can make the plastic parts reduce the internal stress as much as possible and ensure the normal use of the parts. On the contrary, if the process is not properly controlled, a large internal stress will be generated, which not only reduces the strength performance of the component.
In addition, the warpage and even cracking during storage and use can cause the coating to crack or even come off. Therefore, the control of process parameters should make the internal stress as small as possible. Mold plating process conditions include: raw material drying, mold temperature, processing temperature, injection speed, injection time, injection pressure, holding pressure, holding time, cooling time, etc. Selection of plastic materials: There are many types of plastic, but not all plastics can be electroplated. Some plastic and metal layers have poor bonding strength and no practical value; some plastic and metal coatings have physical properties that are too large to be used in high-temperature environments. At present, ABS is the most commonly used mold plating, followed by PP. In addition, PSF, PC, PTFE, etc. also have successful plating methods, but it is more difficult.
