Download GTU BE/B.Tech 2018 Winter 8th Sem New 2182311 Advanced Plastic Mould Design Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (NEW) EXAMINATION — WINTER 2018

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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 : Ejection system ; Split moulds, Baffle 03

(b) Discuss Sleeve ejection with diagram 04

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(c) Design a fully automatic injection mould for the product shown in fig[a] 07

Q.2 (a) Discuss finger cam actuation with sketch 03

(b) Determine the pitch and the pitch circle diameter for the interconnecting groove design , given the following information: 04

Diameter of insert : 35mm ; Gap between inlet and outlet grooves : 5mm ; number of impressions : 24 ; depth of groove : 5mm.

(c) Discuss various transmission systems for unscrewing moulds with sketches 07

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OR

(c) Discuss cooling of deep cores with neat diagrams 07

Q.3 (a) What is register ring? Discuss 03

(b) Discuss Heat Rods 04

(c) For the product shown in fig[a], draw a fully automatic injection machine mould. Use graph paper 07

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OR

Q.3 (a) What is the function of Lathe machine in a mould making shop ? Discuss 03

(b) Write a C Program for Shot Capacity 04

(c) Discuss stripper plate ejection in detail with diagrams 07

Q.4 (a) Fill in the blanks: 03

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1. Material of “O” ring is __________
2. Function of locking heel is __________
3. Undercut is defined as __________

(b) Write a C program for Plasticizing Capacity 04

(c) Discuss in detail about collapsible Cores 07

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OR

Q.4 (a) Draw cooling channel layouts for product shown in fig.[a] 03

(b) Discuss cooling of shallow inserts 04

(c) Discuss Core withdrawal system using Rack & Pinion 07

Q.5 (a) What is a wear plate? Discuss 03

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(b) Write a C program for cooling period of Cycle 04

(c) Discuss multilevel cooling for integer cavities 07

OR

Q.5 (a) What are water ways? 03

(b) A product of weight 30 gms is to be moulded in PP in an injection moulding machine. If a 20 impression mould is desired, work out the shot capacity of the injection machine. Consider: Bulk factor of PS=1.4 Bulk factor of PP =1.9 Specific gravity of PS=1.04 Specific gravity of PP =0.9 04

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(c) Discuss in detail about Heat Pipes 07

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