GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Subject Name:Plastic Manufacturing Technology
Time: 02:30 PM TO 05:00 PM Total Marks: 70
3. Figures to the right indicate full marks.
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI (NEW) EXAMINATION - WINTER 2018
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Subject Code:2163407 Date:27/11/2018Subject Name:Plastic Manufacturing Technology
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.
| Q.1 | (a) Define Plastic Processing Techniques. | 03 |
| (b) Define Weld line, flash & Warpage. | 04 | |
| (c) Compare :Thermoplastics Injection Molding with Thermoset Injection Molding Process. | 07 | |
| Q.2 | (a) Define Shot capacity & Injection Pressure. | 03 |
| (b) Define back pressure ,Suck back & Drooling. | 04 | |
| (c) Explain the function of clamping system & its types. | 07 | |
| OR | ||
| (c) Write short on Injection Mould. | 07 | |
| Q.3 | (a) Explain compression moulding Process with neat sketch. | 03 |
| (b) Explain the types of mold used in compression molding with diagram. | 04 | |
| (c) Write comparison b/w compression & transfer moulding process. | 07 | |
| OR | ||
| Q.3 | (a) Explain about tie layer. | 03 |
| (b) Explain screw nomenclature with neat diagram. | 04 | |
| (c) Explain faults, causes and remedies of transfer moulded article | 07 | |
| Q.4 | (a) What is L/D ratio and compression ratio. | 03 |
| (b) Explain the function sereen pack & breaker plate. | 04 | |
| (c) Write short note on types of dies used in extrusion. | 07 | |
| OR | ||
| Q.4 | (a) Differentiate b/w single stage & two stage blow moulding process. | 03 |
| (b) Differentiate b/w single screw & twin screw extruder. | 04 | |
| (c) Explain the manufacturing process of RPVC pipe with line diagram. | 07 | |
| Q.5 | (a) Write short note on multilayer blow moulding process. | 03 |
| (b) Write short note on pinch-off in blow moulding process. | 04 | |
| (c) What is stretch Blow Molding Process? Why it is used? Explain with advantages & disadvantages. | 07 | |
| OR | ||
| Q.5 | (a) Explain the principle of thermoforming process. | 03 |
| (b) Discuss matched die forming. | 04 | |
| (c) What is drape forming? Give the advantages of pressure forming over vacuum forming. | 07 |
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