In addition to the above solutions, it can also be solved in the following ways:
1. Increase the mold temperature: By increasing the mold temperature, the cooling time can be reduced, thus reducing the bubbles formed by internal contraction.
2. Prolonging the injection time: By adopting high-pressure and low-speed injection, the residence time of plastic in the mold can be increased, so that plastic can better fill the mold and reduce the generation of bubbles.
3. Control the storage speed: If the storage speed is too fast, the plastic may not be completely plasticized in the barrel, resulting in bubbles. Appropriate increase of back pressure can improve this problem.
4. Make sure the raw materials are dry: If the raw materials contain moisture, bubbles may also form during injection molding. Therefore, it is very important to ensure the drying of raw materials.
5. Control the residence time of the plastic in the barrel: If the plastic stays in the barrel for too long, it may cause the plastic to overheat and generate bubbles.
6. Adjust the ejection amount of the screw: If the ejection amount of the screw is too long, the plastic may not be completely plasticized in the mold, resulting in bubbles.
7. Check the exhaust of the mold: If the exhaust of the mold is not smooth, gas may accumulate in the mold and form bubbles.
8. Adjust the injection pressure and injection speed: If the injection pressure is too small or the injection speed is too fast, the plastic may not completely fill the mold, resulting in bubbles.
9. Control the melt temperature and mold temperature: If the melt temperature is too high or the mold temperature is too low, it may affect the plasticization and flow of plastics and lead to the generation of bubbles.