GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VI (New) EXAMINATION - WINTER 2019
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Subject Code: 2163407 Date: 09/12/2019
Subject Name: Plastic Manufacturing Technology
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1
(a) Define Plastics Processing Techniques and write down selection criteria for choosing a particular processing method? [03]
(b) Explain Melting & Solidification behavior of polymer [04]
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(c) What are the process parameters merits and de-merits of Thermoset Injection moulding machine. [07]
Q.2
(a) Define: 1) Shot Capacity, 2) Clamping Force, 3) Injection pressure [03]
(b) Write down Cycle time process variables & its effects on moulding quality [04]
(c) Explain Transfer Molding with merits and demerits [07]
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OR
(c) Explain Influence of process variables such as temperature, pressure, part size & configuration on quality and cycle time of Compression moulding [07]
Q.3
(a) Write a short note on Plunger transfer moulding [03]
(b) Differentiate between single screw extruder and Twin screw extruder [04]
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(c) Classify the types of screw used in extrusion and explain any one in details with neat sketch. [07]
OR
Q.3
(a) Write a short note on screw transfer moulding [03]
(b) Write down merit and de-merit of Twin screw extruder [04]
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(c) Classify the types of dies used in extrusion and explain any one in details with neat sketch. [07]
Q.4
(a) Write a short note on Blown film [03]
(b) Write short note on multilayer blow moulding process [04]
(c) Write down the Trouble shooting in blow moulding with remedies [07]
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OR
Q.4
(a) Write a short note on Cast film [03]
(b) Differentiate between extrusion blow moulding process & injection blow moulding process. [04]
(c) Explain parison programming. [07]
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Q.5
(a) Classify the types blow moulding machine [03]
(b) Discuss Matched die forming in detail [04]
(c) Explain pressure forming process with neat sketch [07]
OR
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Q.5
(a) Write down design factors affecting blow mould product [03]
(b) Discuss in drape Forming in detail [04]
(c) Explain plug assist thermoforming process with Advantage, Disadvantage & applications. [07]
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