GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VIII (New) EXAMINATION — WINTER 2019
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Subject Code: 2182311 Date: 29/11/2019Subject Name: Advanced Plastic Mould Design
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define: Split Mould, Undercut, finger cam 03
(b) Fill in the blanks: 04
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1. ToopenaLHT, we should turn it2. Heat Pipes work on the Principle of
3. Material of Guide Pin is
4. Material of O ring is
(c) For the product shown in fig[a], design a fully automatic 07
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injection machine mould. Show calculations of feedsystem and mention about ejection system.
Q.2 (a) Write about types of undercuts giving examples. 03
(b) What is the difference between finger cam and Dog leg 04
Cam.
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(c) For the product shown in fig[a] , draw a fully automatic 07injection mould using calculations done. use graph paper.
OR
(c) Write a C program for Shot Capacity. 07
Q.3 (a) Draw Z circuit for cooling of integer cavity plates. 03
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(b) Determine the Pitch,and Pitch circle diameter for the 04interconnecting groove design , given the following
information:
Diameter of Insert, D = 35mm
Gap between inlet and outlet grooves, X=4mm
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No.of impressions: 12Depth of groove , m=3.5mm
(c) Discuss in detail, stripper plate ejection highlighting 07
actuation methods.
OR
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Q.3 (a) Discuss cooling of shallow Cores. Show with a drawing 03(b) Discuss about Heat Pipes. 04
(c) Discuss in detail, cooling methods for DEEP Cores. 07
Q.4 (a) What is projected area? 03
(b) Discuss about stripping core design for threaded 04
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components.(c) Discuss with diagrams, auto actuation methods of rotating 07
and withdrawing cores for unscrewing moulds.
OR
Q.4 (a) Discuss Heat Rods. 03
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(b) Write C program for cooling period of cycle 04Q.5 (a) Discuss Air Ejection. 03
(b) Discuss about Sprue Pullers 04
(c) For the product shown in fig[b], draw cooling for both 07
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Core and Cavity.OR
Q.5 (a) Discuss about cooling of multi impression moulds 03
(b) Tick the correct one: 04
1. For cooling cores of Deep products like buckets,
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best cooling is achieved from [a] Baffle Cooling[b] Helical Channel Cooling [c] Bubbler cooling
[d] None of these
2. For nylon 6 product having 1.5mm thread depth,
which mould can be used?
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[a] stripping mould[b] unscrewing moulds with fixed core
[c] unscrewing mould with core withdrawl
[d] none of these.
3. Cavity cooling for multiimpression moulds
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Requires [a] u circuit [b] Z circuit [c] balanced Zcircuit [d] none of these
4. For PVC, The gate that cannot be used is [a] Pin
Ejection [b] Rectangular edge gate [c] Submarine Gate [d]
All of these
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(c) Discuss in detail, about Collapsible Cores. 07--- Content provided by FirstRanker.com ---
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