1.注塑機射出和保壓壓力不足; 2.背壓太小、原料不夠扎實;
1. Insufficient injection and pressure holding pressure of injection molding machine; 2. The back pressure is too small and the raw materials are not solid enough;
3.背壓太大,剪切、磨擦熱量增加; 4.射速太慢,未充分結(jié)晶;
3. If the back pressure is too large, the shear and friction heat will increase; 4. Too slow shooting speed and insufficient crystallization;
5.模溫太高,原料過火、分解、變質(zhì); 6.模溫太低,未充分結(jié)晶;
5. The mold temperature is too high, and the raw materials are too hot, decomposed and deteriorated; 6. Mold temperature is too low and not fully crystallized;
7.射出、保壓時間不足; 8.注塑機停機時間太長了和注塑周期太長;
7. Insufficient injection and pressure holding time; 8. The shutdown time of the injection molding machine is too long and the injection molding cycle is too long;
9.儲料時間太長; 10.二級回料在新料里添加比例太多;
9. The storage time is too long; 10. The proportion of secondary return material in new material is too large;
11.原料強度、韌性不夠,粘度不夠; 12.添加劑不合理,或添加太多;
11. Insufficient strength, toughness and viscosity of raw materials; 12. Unreasonable additives or too many additives;
13.原料未充分烘干; 14.產(chǎn)品內(nèi)部結(jié)構(gòu)有些地方太厚,有些地方太薄,不均勻,進料地方考慮不合理。
13. Raw materials are not fully dried; 14. The internal structure of the product is too thick in some places, too thin and uneven in some places, and the consideration of feeding place is unreasonable.
15.模具進料不均勻,冷料井不夠; 16.產(chǎn)品壁厚太薄
15. Uneven die feeding and insufficient cold well; 16. The product wall thickness is too thin
17.注塑機溫度時高時低,不穩(wěn)定; 18.注塑機料管沒清理好;
17. The temperature of the injection molding machine is high and low, which is unstable; 18. The material pipe of the injection molding machine is not cleaned properly;
19.頂出不合理,塑體應力增加,產(chǎn)生破裂;
19. The ejection is unreasonable, and the plastic stress increases, resulting in fracture;
20.塑料件模具冷卻回路沒排好。
20. The cooling circuit of plastic mold is not arranged properly.