Plastics Product and Mould Design Questions

               CENTRAL INSTITUTE OF PLASTICS ENGINEERING & TECHNOLOGY

                                               Question Bank

1 MARK—QUESTION

2 MARK ---QUESTION

3 MARK --- QUESTION

4/5 MARK ----QUESTION

COURSE : DPT

SEMESTER : IV

SUBJECT : Plastics Product and Mould Design

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1. Differentiate between Heat Pipe and Heat Rod?

2. What are the different types of cooling cavity inserts?

3. Write any two functions of Gate?

4. What is cold slug well?

5. What are the functions of Ribs?

6. What is Daylight?

7. What are the different types of Runner?

8. Differentiate between Balanced and unbalanced runner layout?

9. What is ejector grid?

10. Why cooling system is necessary in Injection Moulds? Contd.., P/7

11. What is the reason for keeping core in moving half?

12. What are the guidelines for gate location?

13. Mention the factors to be considered while deciding wall thickness?

14. What is Rapid prototyping?

15. What is venting?

16. What is clamping force?

17. Write down the procedure for compression moulding?

18. Name the various transfer Moulding process?

19. Name any two merits of transfer moulding?

20. What is pinch off?

21. What is Parison programming?

22. What do you mean by Parison?

23. How to calculate clamping force for blow mould?

24. Any two advantages and disadvantages of Hot runner Mould?

25. What is Rotational Mould?

26. Why Rapid prototyping is used?

27. Mention the types of Extrusion Process?

28. What is meant by preform?

29. Write the advantages of 3D printing?

30. Write down the advantages of plastics over metals in product design?

31. What are the advantages of radius and fillet in plastics products?

32. What are the functions of Ribs in product design?

33. Define blow ratio?

34. Why draft angle should be provided in mould?

35. What is shrinkage?

36. What are the types of compression moulding?

37. What should be the properties of plastic materials used in blow moulding?

38. What is Bulk factor?

39. Define undercut?

40. What is cull?

41. Why flash pocket is necessary in Extrusion blow moulds?

42. Why is venting necessary?

43. What is plasticizing capacity?

44. What is shot capacity (or) Injection capacity?

45. What is the purpose of Breaker plate in Extrusion Die?

46. What are the steel materials used for core, Ejector pins?

47. What is the use of Bosses in plastics product Design?

48. How to calculate the depth of loading chamber in compression mould?

49. What is the use of Heel block in a split cavity injection mould?

50. Define Thermoforming Process?

51. What is RIM Process?

52. What is the job of the HAUL-OFF unit in the Pipe Extrusion process?

53. What is Die Swell?

54. Define Parting Surface. How do you classify?

55. What is Dry cycle time?