Advance Plastics Processing — Summer 2018

Define the types of Calendar rolls arrangements used for making sheet.

Explain the advantages of rotational molding and processing factors affecting product quality.

Explain in details the material and process steps of Reaction Injection molding. t echnique.

State the difference between open cell and closed cell foam.

Differentiate between extrusion blow molding and injection blow molding techniques.

Write the possible cause and remedies of defects in calendering process.

their application and commercial forms of availability.

Explain in detail about material, mould and process steps used in rotational molding process.

Explain briefly about casting process.

Explain heating system for calendar rolls.

Explain parison programming for parison wall thickness control with neat sketch.

Discuss encapsulation process.

Write the procedure of startup and shutdown of blow molding machine.

Explain the rotogravure printing process for printing of plastics.

Explain flexible and rigid foam with application.

List difference between rotomoulding and blow moulding

Discuss the process variable of injection blow molding and defects with cause and remedy for quality control. OR1

Give comparison of reaction injection molding with conventional injection molding.

Write a note on: Speed and cooling effect on product quality in rotomoulding.

Explain the general production methods for manufacturing foamed plastics with neat diagram and applications.

Write about electroplating.

Write a note on: Parision Swell and In mold decoration technique for plastics.

Explain the vacuum metalizing process with a neat sketch.

What is adhesive bonding?

List the various finishing techniques and explain any one.

Explain the types of machinery used in rotomoulding.