Rubber Engineering & its Economics — Summer 2023

Write down the main sources of potential danger, typical causes of accident and method of guarding for internal mixer.

Give the advantages and disadvantages of batch mixing.

Discuss the following features with respect to mixing mill: (i) Ancillary Requirements (ii) Safety Devices.

Write a brief note on extruder as strainer.

Differentiate the ram extruder and screw extruder.

Discuss in detail about the problems associated with extrusion process.

Write a short note on Vacuum Extruder.

Define the term mould. Also give the general classification of mould.

How the flash removal is carried out by grinding?

List the different types of compression mould. Discuss any two in detail.

Write down the causes for following moulding problems: (i) Backrinding (ii) Under cure.

Write down the causes and remedies for following moulding problems:

Poor Knitting (ii) Pebbling.

Discuss the classification of injection moulding machine with respect to its position.

Define the following terms (i) Coating (ii) Embossing (iii) Sheeting.

What do you mean by topping? Which methods are available for it?

With labeled diagrams, explain the Farrel Continuous Mixer (FCM).

Draw various configurations of three roll calender.

What do you mean by cambering? Explain the cambering of three roll calender with figure.

With labeled diagrams, explain the Transfer Molding Process.

Define the terms: - (1) Marginal Cost (2) Variable Cost (3) Fixed Cost.

Write a short note on Market Based Economy.

Discuss the Role of Production Engineer in Rubber Industry.

Define the terms: - (1) Inventory (2) mixed economy (3) Monopoly.

Describe the concept of Mix Economics.

Describe the Role of Quality Assurance Engineer in Rubber Industry.