China Pa66 Plastic Parts Manufacturers

1. Glass fiber reinforced PA

OEM PA Automotive Injection Molding Supplier can significantly improve its mechanical properties, dimensional stability, heat resistance and aging resistance by adding 30% glass fiber to PA. This improvement increases the fatigue strength of PA by 2.5 times. When processing the reinforced PA, the injection molding manufacturer should appropriately increase the injection pressure and injection speed, and increase the barrel temperature by 10-40℃. Since the glass fiber is oriented along the flow direction during the injection process, although the mechanical properties are improved, it may also cause directional shrinkage, thereby causing warping of the product. Therefore, in the mold design, the position and shape of the gate must be reasonable, and the warping phenomenon can be reduced by increasing the mold temperature.

2. Adding flame retardants

Injection molding manufacturers add flame retardants to PA to improve its flame retardant properties. However, most flame retardants are easy to decompose at high temperatures and may release acidic substances, causing corrosion to metal parts, so hard chrome plating is required during the plasticizing process. In terms of process, injection molding manufacturers should pay attention to the cylinder temperature not being too high and the injection speed not being too fast to avoid high temperature causing compound decomposition, which will cause discoloration and mechanical properties of the product to decrease.

3. Use additives such as carbon black

By adding ultraviolet absorbers such as carbon black to PA, injection molding manufacturers can improve the self-lubrication and wear resistance of PA, which is especially important for falling and wear parts during the forming process. Therefore, injection molding manufacturers need to use equipment with strong feeding capacity and high wear resistance, usually composed of screw, barrel, rubber head and rubber gasket to ensure processing stability and efficiency.