Crystallized materials, with low hygroscopicity, are prone to melt fracture and easy to decompose in long-term contact with hot metal;
2. Good fluidity, but large shrinkage range and value, prone to shrinkage cavity, dent and deformation;
3. fast cooling speed, casting system and cooling system should slow heat dissipation, and pay attention to control the molding temperature, material temperature low direction direction is obvious, especially at low temperature and high pressure, mold temperature is less than 50 degrees, plastic parts are not smooth, easy to produce poor welding, mark, more than 90 degrees prone to warping deformation;
4. the plastic wall thickness must be uniform, avoid lack of glue, sharp Angle, to prevent stress concentration.
