PL6704 - PLASTICS PRODUCT DESIGN (Syllabus) 2013-regulation Anna University

PL6704 - PLASTICS PRODUCT DESIGN (Syllabus) 2013-regulation Anna University

PL6704

PLASTICS PRODUCT DESIGN

 LPTC

3003

OBJECTIVES: To enable the students
• To understand the concepts of product design and composite product design.
• To learn the design for threaded moulds and insert moulded products.

UNIT I

10

Product Design -Concepts - size, shape and function - form and function - Aesthetics, Ergonomics - shrinkage, Flash lines. Undercuts - External & Internal - Wall thickness - variances in wall thickness - suggested wall thickness for thermoplastics and thermosetting materials - Emphasize on designing with engineering plastics. Taper or draft. Fits & Tolerances. Designing with plastics for load bearing applications like gears, bearing, sandwich laminates. Design of radii, fillets, ribs and bosses. Design for flow and shape. Moulded Holes - through holes - blind holes - threaded holes - side holes - holes parallel to draw - nearness of holes to each other and side wall - moulding holes not parallel to draw - drilled and tapped holes. Design of integral hinges, hinges and snap fits for boxes and assembly of moulded parts.

UNIT II

8

Moulded threads—thread pieces—threaded holes Inserts-Materials-Selection of metal for inserts-minimum wall thickness of material round inserts-anchorage-relieving moulding stresses around inserts-location of inserts in the part- moulded in inserts-pressed in inserts


UNIT III

9

Quality and economy-tooling aspects on product design-process variables vs product design-product design appraisal. Product design limitations-shrinkage vs tolerance-minimum wall thickness- mechanical properties-creep properties-end use requirements with case studies. Prototype development – rapid prototyping techniques – stereolithography.

UNIT IV

9

Composite product design - Concepts of composite product design-Design requirements- functional-safety-reliability –cost effectiveness Design constraints-use of factor of safety for uncertainities in design-design failure criteria- optimisation in design.

UNIT V

9

Design date-physical, mechanical and functional properties of composites-code of practice of loading on structures-structure properties relation of composites-failure criteria and design. Design of simple structural elements-tension bars-columns-beams-pipes-plates and shells. Design of joints-bolted joints-bonded joints etc.

TOTAL : 45 PERIODS

OUTCOMES:
Students will acquire the knowledge and principles of basic product design.

TEXT BOOKS:
1. Robert A. Malloy, “Plastic Part Design for Injection Moulding”, Hanser Publishers, Munich Vienna, New York, 1994..
2. Paul A. Tres, “Designing Plastic Parts for Assembly”, 2nd Revised Edition, Hanser
3. Publishers, Munich Vienna New York, 1994.

REFERENCES
1. N G Mc Crum, Principles of Polymer Engineering, Oxford Science Publications, New York, 1997.
2. Belofsky, H., “Plastics Product Design and Processing Engineering, Hanser Publishers, Munich Vienna New York, 1994.
3. Plastics Product Design Engineering Hand Book- By Dubois, H.
4. Plastics Product Design & Process Engineering -By Belofsky, Harold.

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