The reason of the whole product is crisp when the mold is produced by injection molding

1. Insufficient injection and pressure pressure of injection molding machine; 2. The back pressure is too small and the raw material is not solid enough;

2. The back pressure is too big, the shear, friction heat increase; 4. The shooting speed is too slow to crystallize;

3. The mold temperature is too high, the raw material overshoot, decompose, metamorphism; 6. The mold temperature is too low to crystallize;

4. Insufficient time for injection and pressure protection; 8. The injection molding machine has been down for too long and the injection cycle is too long;

5. The storage time is too long; 10. The secondary material is added to the new material;

6. Raw material strength, insufficient toughness and insufficient viscosity; 12. Unreasonable additives or too many additions;

7. Raw materials are not fully dried; 14. The internal structure of the product is too thick, and some places are too thin, uneven, and unreasonable in the feeding place.

8. The mold feeding is not uniform, the cold well is not enough; 16. The wall thickness is too thin

9. The injection molding machine temperature is low and unstable; 18. The injection molding machine is not cleaned;

10. It is unreasonable to increase the stress of plasticids, resulting in fracture;

11. The mold cooling circuit of plastic parts is not arranged.