Subject Code: 2143407
GUJARAT TECHNOLOGICAL UNIVERSITY
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SEMESTER-IV(NEW) — EXAMINATION — SUMMER 2019
Subject Name: Mould Manufacturing Technology
Time: 02:30 PM TO 05:00 PM
Date: 09/05/2019
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) Explain how mould cost is estimated and quoted. MARKS 03
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(b) Explain the working principle of Vernier Caliper with neat sketch. MARKS 04
(c) Name different non-metallic materials used for mould construction and what are its advantages & Disadvantages MARKS 07
Q.2 (a) What is the necessary of hard chrome plating MARKS 03
(b) Explain the functioning of Dial-Gauge with neat sketch. MARKS 04
(c) Explain the working principle of WIRE-EDM with neat sketch. MARKS 07
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OR
(c) Explain beryllium-copper alloy? Why it is important in mould manufacturing? State its advantages and disadvantages. MARKS 07
Q.3 (a) Name different parts of the mould. MARKS 03
(b) Explain the working principle of micrometer with neat sketch. MARKS 04
(c) What is Rapid Prototyping? Explain Stereolithography technique with neat sketch. MARKS 07
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OR
(a) What is Chemical etching technique? MARKS 03
(b) Explain how slip gauges are classified based on their accuracy MARKS 04
(c) What is heat treatment process? Explain nitriding heat treatment procedure. MARKS 07
Q.4 (a) What is pantograph? MARKS 03
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(b) Write a short note on mould maintenance. MARKS 04
(c) Explain different types of steels used for mould manufacturing. MARKS 07
OR
(a) How mould life is calculated? MARKS 03
(b) Explain vacuum-hardening heat treatment process. MARKS 04
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(c) Why mould maintenance is important? Explain how it can be achieved by proper scheduling? MARKS 07
Q.5 (a) State the difference between CNC-Turning and CNC-Milling MARKS 03
(b) Write a short note on mould assembly. MARKS 04
(c) Explain how mould cavity thickness can be calculated and why it is important MARKS 07
OR
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(a) How mould is protected against wear and Corrosion. MARKS 03
(b) Explain different types of Mould polishing techniques. MARKS 04
(c) What is CMM? Name different types of CMM? What are the functions of CMM? MARKS 07
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