Yarn manufacture I : Principle of Carding and Drawing
Indian Institute of Technology Delhi and NPTEL via Swayam
Overview
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 fibresINTENDED AUDIENCE : Undergraduate students of Textile TechnologyPREREQUISITES : Nill
Syllabus
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 IntensityWeek 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 driveWeek 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
draftingWeek 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 controlWeek 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 settingWeek 8 :Drawing process and its influence on fibre configuration in sliver, Draft and production calculation
feature of taker-in/ licker-in,waste extraction, opening IntensityWeek 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 driveWeek 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
draftingWeek 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 controlWeek 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 settingWeek 8 :Drawing process and its influence on fibre configuration in sliver, Draft and production calculation
Taught by
Prof.R Chattopadhyay
Charts
- #2 in Subjects / Engineering / Textiles
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Sanjar TojimirzaevGood day. the textile industry is developing day by day. driven by the decision to expand skills. this course will teach you a lot about textiles, discover new possibilities and produce new assortments.
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