PL6605 - PLASTICS PROCESSING TECHNOLOGY – II (Syllabus) 2013-regulation Anna University

PL6605 - PLASTICS PROCESSING TECHNOLOGY – II (Syllabus) 2013-regulation Anna University

PL6605	PLASTICS PROCESSING TECHNOLOGY – II	LPTC

3003

OBJECTIVES: To enable the students

• To understand the processing techniques like thermoforming, calendaring, and rotational moulding.
• To learn the manufacturing of cellular plastics.
• To learn the basic of machining and joining of plastics by various adhesion and welding techniques.

UNIT I		9

Thermoforming Basic principles & types of thermoforming processes, Thermoforming moulds-processing parameters—faults, causes and remedies. Calendering Principle and process description, types of calender units 2, 3 and 4 rolled calenders, Design of calender roll, Heating and temp control, roll crown, roll crossing and roll bending, materials for calendering, calendering sheets and films, embossing, coating and lamination by calender, comparison between calendering and extrusion.

UNIT II		9

Rotational moulding - Introduction-principle-process-machinery used-materials-moulds process parameters-merits & demerits of roto moulding. FRP & Laminates - Introduction, FRP Processing methods-contact moulding-hand lay up, Spray up method-vacuum bag & pressure bag moulding, filament welding Centrifugal casting, pultrusion, pulforming matched die moulding – Laminates, definition of terms-high, medium and low pressure laminating process, types of machinery, impregnation systems – decorative and industrial laminates, continuous high pressure laminating process, application.

UNIT III		9

Cellular plastics - Introduction-process to create foam in resins-mechanical foaming, chemical foaming, physical foaming-processes to shape and solidify foams – low Pressure foam moulding, high pressure foam moulding, RIM Casting foams, steam chest moulding structural foam moulding–applications – Foamed extrusion. Casting Processes - Introduction – casting processes viz:Mould casting, Empedding/potting, Encapsulation –Dipcasting-slush casting Roto casting, cell casting, static powder casting, continuous casting, solvent casting, operation and control of above csting processes plastisol processing. Coating Process - Introduction-Roller coating methods, powder coating-fluidaised bed coating, Electro static spray coating-Equipment, process and applications.

UNIT IV		9

Machining & Joining of Plastics (10 hours) - Introduction-Importance of machining – methods viz; cutting, drilling, blending, filling etc., joining-principles-cohesion principle, adhesion principle – solvent cementing. Dop cementing, welding of plastics-viz high frequency welding thermal sealing, spin welding, vibration welding, hot plate welding, ultrasonic welding, Adhesive ponding-examples: Mechanical fasteners.

UNIT V		9

Other Secondary Processes like Printing, painting, Hot slamping, In mould decoration, Electro plating and vacuum metallising.

TOTAL : 45 PERIODS

OUTCOME:

Upon completion of this course, the students will acquire the knowledge of specific processing techniques such as thermoforming, calendaring, and rotational moulding. They also learn the machining and joining of plastic materials.

TEXT BOOKS:

1. A Guide to Injection Molding of Plastics - By Bolur, P.C.
2. Development in Injection Molding - By Whelan, A & Craft, J.L.
3. Technician’s Hand Book & Plastics - By Grandilli, P.A.

REFERENCES

1. Plastics Materials & Processing - By Schwartz & Goodman.
2. Injection Molding - By Athalye, A.S.
3. Injection Molding Technology - By V.D.I.
4. Innovation in Polymer Processing - By Stevenson.
5. Extrusion The definitive Processing Guide and Hand Book - By Giles, H.H & Others.
6. Compression Molding - By Iyesew, A.I.
7. Polymer Extrusion - By Rauwedaal, Chris.
8. Thermoforming - By James & Throne.
9. Basic Principle of rotational molding - By Crawford, R.J & Throne, J.L.
10. Basic Principle of Rotational Molding - By Bruins.
11. Basic Principle of Thermoforming - By Brycle, D.M
12. Plastics Injection Molding - By Brycle, D.M.
13. Injection molding of Plastics component - By Bown John.
14. Plastics Mold Design Vol.1 Compression & Transfer Moulds - By Bebb.
15. Plastics forming - By Beadle.
16. Plastics Forming - By Figher.
17. Calendering of Plastics - By Elden & Swan.
18. Welding of Plastics - By New Man.