Yarn manufacture I : Principle of Carding and Drawing
ABOUT THE COURSE:
Carding and drawing are two fundamental process in yarn manufacture. Incarding the fibre tufts are opened , cleaned and separated thoroughly by fast moving pinned surfaces
and then reassembled to form a nice 2D array of fibres which is subsequently transformed into an uniform sliver. Drawframe is essentially a stretching device for sliver used to improve mass irregularity of sliver and parallelization of fibres
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Final Exam (in-person, invigilated, currently conducted in India) is mandatory for Certification and has INR Rs. 1100 as exam fee
INTENDED AUDIENCE: Undergraduate students of Textile Technology
CORE/ELECTIVE: Core
UG/PG: UG
PREREQUISITES: None
INDUSTRY SUPPORT: None
631 students have enrolled already!!
ABOUT THE INSTRUCTOR:
Dr. R. Chattopadhyay is Professor at the Department of Textile Technology, Indian Institute of Technology IIT Delhi. He is also an alumnus of this institute. He is involved in teaching, research, consultancy and organising courses for industry and academia. His area of expertise is staple fibre spinning, quality & process control , industrial ropes and product design. He has guided 8 doctoral and 52 master thesis and has about 75 research papers in national and international Journals. He is member of The Textile Institute UK and The Institution of Engineers, India. He is member of International Advisory Board for Journal of Textile Engineering, Japan and Chairman Consulting editor for the Journal of Institution of Engineers. He is a regular reviewer of papers published in Journal of Textile Institute (UK), Textile Research Journal (USA), Indian Journal for Fibre and Textile Research. His current research interest are Structure - property - performance relationship in yarns, ropes and cordages, Textile product design and pressure garments.
COURSE LAYOUT:
Week 1 : Objectives of carding process, carding actions , working principle of
carding machine, Card feed system, lap and continuous feed systems,
design feature of taker-in/ licker-in, waste extraction, opening
Intensity Week 2 : Design feature of cylinder section, construction , design and working
of flats, analysis of carding theory , carding force, fibre shedding,
Transfer of fibres from cylinder to doffer, Technological significance
of doffing arc, doffing of web , web condensation, Package
formation: Forms of packaging, coiling, analysis of can drive Week 3 : Motion transfer in card, draft and production calculations, card
setting, significance of setting, Week 4 : Card clothing: licker-in, cylinder ,doffer clothing; card tooth
geometry, Operational load on cylinder , fibre transfer efficiency,
carding process, Week 5 : Autoleveller in card: principle of autolevelling, type of autoleveller,
type of autoleveller, correction length, Fibre configuration in card
sliver, mechanism of fibre hook and nep formation, cloudy web,
Drawframe: Fundamentals of drafting, draft , ideal drafting,
geometrical analysis of fibre movement in drafting Week 6 : Objectives of drawing, Design features and working mechanism of
drawframe. Drafting unit, drawing rollers, Drafting roller
arrangement and its significance , package formation, Autoleveller in
drawframe, Sliver irregularity and its control Week 7 : Theory of drafting, Vasileff’s model of drafting, drafting wave,
Drafting force , draft vs drafting force, Roller setting: analysis of
roller setting, influence of roller setting Week 8 : Drawing process and its influence on fibre configuration in sliver,
Draft and production calculation
SUGGESTED READING MATERIALS:
1. Fundamentals of spun yarn Technology, C. A. Lawrence, CRC Press, 2003. 2. Manual
of Textile Technology, Volumes 1-3, W. Klein, The Textile Institute, Manchester, 1993. 3. The
Economics, Science and Technology of Yarn Production, P. R. Lord, School of Textiles, NC State
University, USA, 1981. 4. The Institute Series on Textile Processing. Volume : Opening, Cleaning, and
Picking, Zoltan S. Szaloki, Institute of Textile Technology, Charlottesville, Virginia, 1976. 5. Technology
of Carding, R. Chattopadhyay, NCUTE Publication, Ministry of Textiles, Govt. Of India, 2003. 6. Spun
Yarn Technology, Butterworths, London, 1987.
CERTIFICATION EXAM :
The exam is optional for a fee.
Date and Time of Exam: October 7, 2018 (Sunday):
Time of Exams: Morning session 9am to 12 noon; Afternoon session: 2pm to 5pm.
Exam for this Course will be available in both morning & afternoon sessions.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published.
CERTIFICATE:
Final score will be calculated as : 25% assignment score + 75% final exam score
25% assignment score is calculated as 25% of average of Best 6 out of 8 assignments
E-Certificate will be given to those who register and write the exam and score greater than or equal to 40% final score. Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Madras. It will be e-verifiable at http://nptel.ac.in/noc/
