The technology and process involved in injection molding are as follows:

1. Excessive processing pressure, high speed, excessive filling, excessive injection and holding time will lead to excessive internal stress and cracking.

2. adjust the speed and pressure of the mold opening to prevent the workpiece from being rapidly stretched to cause demoulding and cracking.

3. the injection pressure is too low or the injection speed is too fast.

4. prevent plastic degradation caused by plastic degradation due to welding cracks.

5. make proper use of release agent, and pay attention to eliminating the adhesion of mold surface and other substances.

6. by eliminating the internal stress immediately after annealing, the residual stress of the workpiece can be reduced.

7. no lubrication or lubrication, but poor results.

8. raise mold temperature appropriately, make parts easy to mold release, reduce material temperature and prevent decomposition.

9. In the production of products, due to uneven cooling in the cavity, uneven shrinkage of plastics, unreasonable product structure design, easy to cause various defects of products;

10. plasticizing is bad, namely melt can not melt completely.