DPT 4th Sem Plastics Product and Mould Design Question Bank

        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. Write about different types of hinges and snap fits.

2. Explain 3-plate mold with neat sketch?

3. Why Ribs are needed in plastic product design? Explain the methodology with neat sketch.

4. What is the importance of taper or draft in product design?

5. Explain the importance of designing radii and fillets in a product.

6. What is the importance of ribs and bosses? What are the design considerations to be taken

while designing ribs and bosses?

7. Explain two plate mold with neat sketch.

8. What are design guidelines for injection molding plastic part design?

9. What is Runner and its types? How Runner size is calculated? Write a short note on Runner

efficiency.

10. What are the major components of Ejection system? Explain sleeve Ejection technique with

neat sketch.

11. Explain a. Baffle cooling b. bubbler cooling c. thermal pin cooling with neat sketches.

12. What is parting line? How many types of parting line were there? What are the major factors

to be considered for the selection of parting line?

13. What is shrinkage? How the shrinkage value is calculated? What are the factors that cause

shrinkage and what are the factors that reduce shrinkage.

14. Discuss in detail about bosses & their design in plastic parts

15. Explain what is extrusion & its principle? What are the different types of extruder zones and

its applications explain with the help of neat sketch.

16. What is extrusion principle? How extrusion dies are classified? Explain any one type of

extrusion die with neat sketch.

17. Explain extrudate swell, shark skin & Bambooing effect in extrusion with appropriate

sketches? What are the causes and remedies for the same?

18. Explain straight through extrusion die with neat sketch.

19. Explain offset extrusion die with neat sketch.

20. What is thermoforming? Explain Mechanical & Vacuum Thermoforming process with neat

sketch.

21. Explain Pot & plunger type transfer Molds with neat sketch.

22. List the types of compression molds. Explain with neat sketch any one in detail.

23. What is Rapid prototyping? Explain steriolithiography technique with neat sketch.

24. Discuss about RIM Process, applications & Benefits in modern industry.

25. What are the Plastic Part Design Guidelines for Injection Molding?