Introduction to the molding characteristics of PE plastics

1. Crystalline material, small moisture absorption, do not need to be fully dried, excellent fluidity fluidity is sensitive to pressure, molding is suitable for high-pressure injection, material temperature uniformity, filling speed, holding pressure sufficient. It is not suitable to use direct gating to prevent uneven shrinkage and increase of internal stress. Pay attention to the choice of gate location to prevent shrinkage and deformation. 

2. The shrinkage range and shrinkage value are large, the directionality is obvious, easy to deformation and warping. The cooling speed should be slow, and the mold should have cold cavities and cooling system.

 3. Heating time should not be too long, otherwise decomposition will occur.

4. Soft plastic parts with shallow side grooves can be forced out of the mold. 

5. It is not suitable to contact with organic solvent to prevent cracking because of the possibility of melt rupture.