Download GTU BE/B.Tech 2018 Winter 7th Sem New 2172601 Rubber Equipment Design Ii Question Paper

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Subject Code: 2172601

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-VII (NEW) EXAMINATION - WINTER 2018

Subject Name: Rubber Equipment Design-II

Time: 10:30 AM TO 01:00 PM

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

1. (a) Give the importance of Parting line in Mold. [03]
2. (b) Write the factors affecting the design and construction of the mold. [04]

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3. (c) Discuss in detail about “Cryogenic Deflating”. [07]

Q.2

1. (a) “Strength of the cavity is important parameter in mold design” justify the statement. [03]
2. (b) Write the properties required for Sprue Bush. [04]
3. (c) Explain the Transfer molding process in detail with diagram and write the advantages of transfer molding over compression molding. [07]

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OR

1. (c) Explain in detail about Thermal Consideration for Transfer molding. [07]

Q.3

1. (a) Give the function & importance of Die. [03]
2. (b) List the important aspects for practical die design. [04]

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3. (c) Write a Short note on “Die Geometry” [07]

OR

1. (a) “Strength and rigidity is important factors for die design” justify the statement. [03]
2. (b) Which materials are used for die construction? [04]
3. (c) Rubber extruder die is essentially a ‘stream lined channel'-Explain the statement. [07]

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Q.4

1. (a) Define the term (1) Lead (2) Compression Ratio (3) Starts [03]
2. (b) Give the difference between Hot feed and Cold feed Extruder. [04]
3. (c) Explain the Thermal conductivity and Boundary layer affects Extrusion cooling. [07]

OR

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1. (a) Write the importance of Feed Roller in Extruder. [03]
2. (b) Give the difference between Bimetallic liner and Induction Liner. [04]
3. (c) Discuss the effects of the Screw & Barrel temperature in detail. [07]

Q.5

1. (a) Define the term (1) Shot capacity (2) Locking Force (3) Sink Mark. [03]

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2. (b) List out and Draw the different design of Runner cross section. [04]
3. (c) Discuss the factors which influencing mold filling in Injection molding. [07]

OR

1. (a) Write the disadvantages of Injection Transfer molding. [03]
2. (b) Give the comparison between Insulated runner systems and Internally heated runner system. [04]

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3. (c) List out the different types of Injection Units and explain any two in detail. [07]

Date: 15/11/2018

Total Marks: 70