GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University
Subject Code: 2182307
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VIII (NEW) EXAMINATION — WINTER 2017
Subject Name: Advanced Plastic Mould Design
Time: 02:30 PM TO 05:30 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) | Define Split mould. Why do we use split moulds? | 03 |
| (b) | Discuss cooling of shallow inserts | 04 | |
| (c) | Design a fully automatic injection mould for the product shown in fig[a] | 07 | |
| Q.2 | (a) | Define : waterways, locking heel, O ring | 03 |
| (b) | Discuss stripping of internal threads design | 04 | |
| (c) | Determine the pitch and the pitch circle diameter for the interconnecting groove design , given the following information: Diameter of insert : 30mm ; Gap between inlet and outlet grooves : 4mm ; number of impressions : 14 ; depth of groove : Smm. | 07 | |
| OR | |||
| (c) | For the product shown in fig[a], draw a fully automatic injection machine mould. Use graph paper | 07 | |
| Q.3 | (a) | Fill in the blanks: a. core cooling is preferred if we have deep cores. b. Sprue puller is preferred for nylons --- Content provided by FirstRanker.com --- c. Material of O ring is | 03 |
| (b) | Write C program for shot capacity | 04 | |
| (c) | Discuss various transmission systems for unscrewing moulds with sketches | 07 | |
| OR | |||
| (c) | What is shrinkage? Why should mould be designed considering shrinkage? | 07 | |
| Q4 | (a) | Write a C program for cooling period of Cycle | 03 |
| (b) | What is a sprue puller? Discuss various types with applications | 04 | |
| (c) | Write MOC for split cavity , O ring, locking heel | 07 | |
| Q4 | (a) | Write C program for no.of impressions | 03 |
| (b) | Discuss Heat Pipes | 04 | |
| (c) | OR Differentiate between finger cam and dog leg cam for Split moulds | 07 | |
| Q.5 | (a) | Where do we use a angled lift split mould? | 03 |
| (b) | Discuss in detail about cooling of DEEP cores | 04 | |
| (c) | Core withdrawal systems using hydraulics | 07 | |
| Q.5 | (a) | Draw cooling layout for cavity in case of round caps , impression mould. | 03 |
| (b) | Discuss in detail Collapsible cores | 04 | |
| (c) | List various methods of actuation of Split mould and discuss any one in detail | 07 | |
| (a) | Discuss Core withdrawal system using Rack & Pinion | 03 | |
| (b) | Discuss in detail about Heat Pipes | 04 | |
Date: 07/11/2017
Total Marks: 70
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