GTU BE 2019 Summer Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
SEMESTER-VI(NEW) — EXAMINATION - SUMMER 2019
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Subject Code:2163407 Date:16/05/2019
Subject Name:Plastic Manufacturing Technology
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks
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| MARKS | |
|---|---|
| Q.1 (a) Define: Plastics Processing Techniques. Explain the selection criteria for choosing a particular processing method? | 03 |
| (b) Explain injection moulding process & its cycle time. | 04 |
| (c) Explain nomenclature of injection moulding screw & Function of each zone. | 07 |
| Q.2 (a) Define Max. Daylight & Shot capacity. | 03 |
| (b) Differentiate b/w hydraulic clamping & toggle clamping. | 04 |
| (c) Explain any five common injection molding defects with its cause & remedies. | 07 |
| OR | |
| (c) Write short on Feeding system & Cooling system in Injection mould. | 07 |
| Q.3 (a) Explain Transfer moulding process with neat sketch. | 03 |
| (b) Explain the types of mold used in compression molding with diagram. | 04 |
| (c) Explain up-stroke & down-stroke compression moulding machine. | 07 |
| OR | |
| Q.3 (a) Explain applications of extrusion process. | 03 |
| (b) Differentiate b/w Single screw & Twin screw extruder. | 04 |
| (c) Explain shark skin, melt fracture & bambooing. | 07 |
| Q.4 (a) Explain blow moulding process & classify it. | 03 |
| (b) Write short note on materials used for blow moulds. | 04 |
| (c) Explain parison programming with neat sketch. | 07 |
| OR | |
| Q.4 (a) Explain the function of thrust bearing in extruder. | 03 |
| (b) Differentiate b/w blown film & cast film. | 04 |
| (c) Write short note on stretch blow moulding process. | 07 |
| Q.5 (a) Write the principle of thermoforming process. | 03 |
| (b) Explain Plug assisted thermoforming process. | 04 |
| (c) Explain Drape forming process. | 07 |
| OR | |
| Q.5 (a) Explain about tie layer. | 03 |
| (b) Explain faults, causes and remedies of blow moulding process. | 04 |
| (c) Explain faults, causes and remedies of thermoforming process. | 07 |
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