How to prevent plastic barrels from becoming brittle

- Nov 12, 2019-

1. The temperature of the barrel and nozzle is too low and needs to be adjusted. If the material is easily degraded, the temperature of the barrel and nozzle should be increased.

2. Reduce the pre-plastic back pressure and speed of the screw to make the material slightly loose and reduce the degradation of the plastic due to shearing and overheating.

3. The mold temperature is too high and it is difficult to demould. The mold temperature is too low, the plastic is prematurely cooled, the fusion joint is poorly fused, and cracking is easy, especially for high melting point plastics such as polycarbonate.

4. The cavity core should have a proper draft angle. When the core is difficult to demould, it is necessary to increase the cavity temperature and shorten the cooling time. When the cavity is difficult to remove, reduce the cavity temperature and extend the cooling time.