Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 4th Sem 3142308 Fundamentals Of Mold Design Previous Question Paper
Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?IV (NEW) EXAMINATION ? WINTER 2020
Subject Code: 3142308 Date:11/02/2021
Subject Name: Fundamentals of Mold Design
Time:02:30 PM TO 04:30 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) Define: Core, Register Ring ,Cavity
03
(b) Define: Sprue Bush, Runner and Gate, Guide Bush, Guide Pillars
04
(c) Explain about Integer cavity and Integer core plates with neat sketch.
07
Q.2 (a) Explain in brief about Inserts
03
(b) Comparison between Ejector & Retaining Plate.
04
(c) Explain about shape and type of Inserts with neat sketch.
07
Q.3 (a) Define Parting surface of mold. List out various types of Parting
03
surface.
(b) Explain in brief about Locating Ring
04
(c) Sketch any four types of Guide pins used in Mold design.
07
Q.4 (a) List types of Bolster Plate.
03
List out various types of Ejector system
(b) State importance of cooling in mold design.
04
(c) Explain about Sprue Puller in detail.
07
Q.5 (a) Choose any product produced in Hand Injection Molding machine.
03
Draw plan & sectional Elevation of the selected product.
(b) Draw sectional Elevation of Hand Injection mold for above selected
04
product.
(c) Draw plan & Inverted Plan of Hand Injection mold for above selected
07
product.
Q.6 (a) For a Rectangular product of Polyacetal having length 100mm,width
03
50mm and height 25mm , wall thickness 2mm throught. Calculate the
dimensions of rectangular edge gate.
(b) Calculate the shot capacity of an injection molding machine if a product
04
weight 20 gms is to be moulded in ABS and a 8 impression mold is
desired.
Assume:
Bulk factor of PS=1.9
Bulk factor of ABS=1.8
Specific gravity of PS=1.04
Specific gravity of ABS=1.0
(c) Discuss Sleeve Ejection in detail.
07
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Q.7 (a) List types of Runner.
03
(b) List the factors govern the size of Runner.
04
(c) Explain about Runner balancing with different examples and neat
07
sketch.
Q.8 (a) List types of Gate used in Mold Design.
03
(b) Discuss the application of any four Gate.
04
(c) Explain about Film Gate in detail with neat sketch.
07
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This post was last modified on 04 March 2021