PC material has the characteristics of high strength, good transparency, low molding shrinkage, and good processing performance. It is widely used in the electronic and electrical industry and industrial parts. Today, Daliang will talk with you about the injection molding process of PC material and the choice of screw.

PC has excellent performance, high transparency, good impact toughness, creep resistance, and wide operating temperature range.

The process characteristics of PC are: the melt viscosity is less sensitive to the shear rate, but the temperature sensitivity is large, there is no obvious melting point, the melt viscosity is high, the resin is easy to hydrolyze at high temperature, and the product is easy to crack.

In view of these characteristics, we must pay special attention to the difference: to increase the fluidity of the melt, not by increasing the injection pressure, but by increasing the injection temperature. The runners and gates of the mold are required to be short and thick to reduce the pressure loss of the fluid, and at the same time, a higher injection pressure is required. The resin needs to be fully dried before molding and processing to keep its water content below 0.02%. In addition, the resin should be insulated during processing to prevent re-absorption of moisture. Not only is a reasonable product design required, but also the molding process should be properly mastered. For example, increasing the mold temperature and post-processing the product can reduce or eliminate internal stress. According to the different conditions of the product, adjust the process parameters in time.
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