Download GTU B.Tech 2020 Winter 7th Sem 2173409 Plastic Mold And Die Design Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2173409 Plastic Mold And Die Design Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2173409 Date:28/01/2021
Subject Name:Plastic mold & Die design
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS
Q.1 (a) What are the machines used for fabrication of molds.
03

(b) What are the design considerations and constraints for split mould?
04

(c) What are parts of Conventional Injection Mold and Suggest best materials to
07
Manufacture them with neat sketch



Q.2 (a) What is Honing Operation?
03

(b) What is Shrinkage and how it can be calculated? What is warpage?
04

(c) Explain the Working principle of EDM-wire cut machine with neat sketch
07




Q.3 (a) What are the parts of Extruder screw and their functions
03

(b) For a 8 ? cavity Mould explain the concept of Runner and Gate Balancing
04

(c) What is Transfer Molding? Explain the Design principles of Pot and Plunger
07
transfer mold with appropriate sketches.




Q.4 (a) What is Transfer Pot and Loading chamber?
03

(b) Explain the working principle of Form Pin.
04

(c) What is Extrusion? What are the die Design Goals of Extrusion Die and suggest
07
the ways to accomplish the same.
Q.5 (a) What is Gate? What are the factors that required selecting the optimum size of
03
Gate?

(b) What is Bolster? Name the types of Bolsters available and what are the materials
04
used for construction of bolsters.

(c) Explain the working Principle of Finger cam actuation mechanism with neat
07
sketch and necessary calculations



Q.6 (a) What is Runner efficiency and how it is calculated?
03

(b) What is Sprue? Write a short Note on Sprue Design and Its types with
04
appropriate sketches

(c) What is Runner? How many Types of Runners were there with neat sketches?
07
How runner size and layout is calculated? Suggest the best runner.
Q.7 (a) Explain Transfer Molding Cycle with neat sketch.
03

(b) Explain Flash Type compression mold with neat sketch.
04

(c) Explain Different types of Gates with neat sketches? Explain how Auto-Degating
07
can be achieved?



Q.8 (a) What are the fundamentals to be considered in designing Transfer Molds?
03
(b) Explain how Integer Core and cavity cooling can be achieved with neat diagram.
04
(c) What is Parting surface? Explain How parting surfaces are classified.
07
.
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