Plastics Product Design — Summer 2025

What is product design? What are the roles of a product designer?

What is check list? List the ideal check list for product design.

List the various steps followed in preliminary product design.

What are the limitations of plastic materials?

Write short notes on parting line.

Explain wall thickness design considerations while designing the product.

What is the importance of metal inserts in plastic part? Explain briefly about types of inserts.

List any three self-lubricating plastic materials.

What are the reasons for the failure of a plastic product?

Explain the long-term and short-term properties of plastics.

What care should be taken while selecting a material for making milk pouches?

Explain the importance of designing radii and fillets in a product.

Explain molded holes in product design.

What are the disadvantages of injection moulding?

Classify various plastics processing techniques on the basis of product contour.

Compare different plastic processing methods with respect to product size.

Which process is used to manufacture thermoplastic chairs and why?

Explain briefly about thermoforming?

Compare blow moulding & rotational moulding processes.

Define: i) Draft or Taper ii) Warpage iii) Hinges

What is the importance of ribs and bosses?

Describe the procedure for designing gears.

Describe the selection of material for designing a pump impeller.

Explain briefly external and internal threads.

Describe the procedure for designing chemical reactor.