Introduction of PC plastic injection molding process

PC plastic is a relatively common plastic in injection molding. Many plastic parts are especially injection molded. PC plastic has been recognized by the market for its excellent performance. So when PC plastic is in injection molding, what should be paid attention to in this process?

1. Introduction to the performance of PC plastics

PC material has the characteristics of high strength, good transparency, low molding shrinkage, and good processing performance, and is widely used in the fields of electronic appliances and industrial parts. Today, I will talk with you about the injection molding process of PC materials and the selection of screws.

2. PC plastic process characteristics

The process characteristics of PC are: melt viscosity is less sensitive to shear rate, but more sensitive to temperature, no obvious melting point, high melt viscosity, easy hydrolysis of resin at high temperature, and easy cracking of products.

3. PC plastic injection molding process

In view of these characteristics of PC plastics, we should pay special attention to different treatment: to increase the fluidity of the melt, it is not by increasing the injection pressure but by increasing the injection temperature. The runner and gate 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.

Before molding, the resin needs to be fully dried to keep the water content below 0.02%. In addition, heat preservation measures should be taken during the processing to prevent re-absorption of moisture.

Not only a reasonable product design is required, but also the molding process should be correctly mastered, such as increasing the mold temperature and post-processing the product to reduce or eliminate internal stress. Adjust the process parameters in time according to the different conditions of the product.

When PC plastic is being processed by injection molding, the operator needs to be familiar with the characteristics of the plastic itself, so that it can be injected into qualified injection molding products.