PL8604 - PLASTICS PROCESSING TECHNOLOGY II (Syllabus) 2017-regulation Anna University

PL8604 - PLASTICS PROCESSING TECHNOLOGY II (Syllabus) 2017-regulation Anna University

PL8604	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	THERMOFORMING AND CALENDERING	9

Basic principles –Raw materials & 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	FRP & LAMINATES	9

Introduction, FRP Processing methods-contact moulding-hand lay up, Spray up method-vacuum bag & pressure bag moulding, Autoclave- filament winding, 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	CELLULAR PLASTICS	9

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.

UNIT IV	ROTATIONAL MOULDING, CASTING AND COATING PROCESS	9

Rotational moulding - Introduction-principle-process-machinery used-materials-moulds process parameters-merits & demerits of roto moulding. Casting Processes - Introduction – casting processes viz: Mould casting, Embedding /potting, Encapsulation –Dip casting-slush casting Roto casting, cell casting, static powder casting, continuous casting, solvent casting, operation and control of above casting processes plastisol processing. Coating Process - Introduction-Roller coating methods, powder coating-fluidized bed coating, Electro static spray coating-Equipment, process and applications.

UNIT V	POST MOULDING / SECONDARY PROCESS ON PLASTICS PRODUCTS	9

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 bonding-examples: Mechanical fasteners- Printing, painting, Hot stamping, In mould decoration, Electro plating and vacuum metalizing.

TOTAL : 45 PERIODS

OUTCOMES: 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. Development in Injection Molding - By Whelan, A & Craft, J.L.
2. Technician’s Hand Book & Plastics - By Grandilli, P.A.,1981.

REFERENCES:

1. Plastics Materials & Processing - By Schwartz & Goodman.,1982.
2. Innovation in Polymer Processing - By Stevenson.,1996.
3. Thermoforming - By James & Throne.,2013.
4. Basic Principle of rotational molding - By Crawford, R.J & Throne, J.L.
5. Basic Principle of Rotational Molding - By Bruins.
6. Basic Principle of Thermoforming - By Brycle, D.M