1. 塑料注射成型工艺基础

2. 内容提要
注射工艺过程
注射压力
填充模式
浇注系统与流道平衡
冷却系统
应力、收缩与翘曲
常见的注塑缺陷
CAE软件应用指南

3. Co-injection molding

4. Fusible core injection molding

5. Gas-assisted injection molding

6. Injection-compression molding

7. Lamellar (microlayer) injection molding

8. Live-feed injection molding

9. Low-pressure injection molding

10. Push-pull injection molding

11. Structural foam injection molding

12. Process cycle

13. Importance of process conditions

14. Resin data table Generic Name Melt Temperature (C/F)
Mold Temperature (C/F) 
Min. 
Rec. 
Max. 
ABS 
200/392 
230/446 
280/536 
25/77 
50/122 
80/176 
PA 6 
255/491 
300/572 
70/158 
85/185 
110/230 
PC 
260/500 
305/581 
340/644 
95/203 
120/248 
PET 
265/509 
270/518 
290/554 
100/212 
PMMA 
240/464 
250/482 
35/90 
60/140 
POM 
180/356 
225/437 
235/455 
105/221 
PP 
20/68 
PS 
PVC 
160/320 
190/374 
220/428 
40/104 
SAN 

15. Temperature-time curve at various locations in the mold

16. Screw positions at various stages

17. Cycle time and its components

18. Required mold opening

19. Determination of the gate/part freezing time

20. Pressure decreases along the delivery system and the cavity

21. Factors influencing injection pressure requirements (I)
  Variable 
Higher injection pressure required 
Lower injection pressure required 
PART DESIGN
Part thickness 
Part surface area

22. Factors influencing injection pressure requirements (II)
  Variable 
Higher injection pressure required 
Lower injection pressure required 
GATE DESIGN 
Gate size   
Flow length 

23. Factors influencing injection pressure requirements (III)
  Variable 
Higher injection pressure required 
Lower injection pressure required 
PROCESSING CONDITIONS 
Melt temperature 
Part surface area
Ram speed 

24. Factors influencing injection pressure requirements (IV)
  Variable 
Higher injection pressure required 
Lower injection pressure required 
MATERIAL SELECTION
Melt flow index 

25. Injection pressure as a function

26. Melt front advancements

27. Melt-front velocity and melt-front area

28. Fiber orientations

29. Variation of MFA

30. Basic runner system layouts

31. Commonly used runner cross sections

32. Equivalent hydraulic diameters

33. Runner diameter chart

34. Effect of runner length

35. Hot runner system types

36. Filling patterns resulting from various injection rates

37. Cold slug

38. A family-mold part with artificially balanced runners

39. Gate size terminology
                                              
FIGURE 1. Gate size terminology

40. Gate types （I） Direct (sprue) gate Tab gate Edge (standard) gate
Overlap gate Fan gate Disk (diaphragm) gate

41. Gate types （II）
Ring gate Spoke (spider) gate Film (flash) gate

42. Mold cooling accounts for more than two-thirds of the total cycle time

43. Proper and efficient cooling improves part quality and productivity

44. A typical cooling system for an injection molding machine