YARN MANUFACTURE I : PRINCIPLE OF CARDING AND DRAWING COURSE OUTLINE : ABOUT INSTRUCTOR : COURSE PLAN : Carding and drawing are two fundamental process in yarn manufacture. In carding 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. Prof. R. Chattopadhyay, is working as professor in the department of Textile Technology, IIT Delhi. He has been teaching in the department for last thirty years and has keen interest in yarn manufacturing process, mechanics of yarn structure, process control, application of statistics in textile industry and textile product design. Week 01 : Week 02 : Week 03 : Week 04 : Week 05 : Week 06 : Week 07 : Week 08 : PROF. R CHATTOPADHYAY Department of Textile Technology IIT Delhi INTENDED AUDIENCE B.E/B.Tech : 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. 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. Motion transfer in card, draft and production calculations, card setting, significance of setting. Card clothing: licker-in, cylinder, doffer clothing; card tooth geometry, Operational load on cylinder, fibre transfer efficiency, carding process. 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. 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. 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. Drawing process and its influence on fibre configuration in sliver, Draft and production calculation. TYPE OF COURSE COURSE DURATION EXAM DATE Rerun | Core | UG 8 weeks (29 Jul’19 - 20 Sep’19) 29 Sep 2019 : : : 391

YARN MANUFACTURE I : PRINCIPLE OF CARDING AND DRAWING · 2019-06-12 · Carding and drawing are two fundamental process in yarn manufacture. ... Objectives of carding process, carding

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YARN MANUFACTURE I : PRINCIPLE OFCARDING AND DRAWING

COURSE OUTLINE :

ABOUT INSTRUCTOR :

COURSE PLAN :

Carding and drawing are two fundamental process in yarn manufacture. In carding the �bre tufts are opened, cleaned and separated thoroughly by fast moving pinned surfaces and then reassembled to form a nice 2D array of �bres 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 �bres.

Prof. R. Chattopadhyay, is working as professor in the department of Textile Technology, IIT Delhi. He has been teaching in the department for last thirty years and has keen interest in yarn manufacturing process, mechanics of yarn structure, process control, application of statistics in textile industry and textile product design.

Week 01 :

Week 02 :

Week 03 :Week 04 :

Week 05 :

Week 06 :

Week 07 :

Week 08 :

PROF. R CHATTOPADHYAYDepartment of Textile TechnologyIIT Delhi

INTENDED AUDIENCE B.E/B.Tech:

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.Design feature of cylinder section, construction, design and working of �ats, analysis of carding theory, carding force, �bre shedding, Transfer of �bres from cylinder to do�er, Technologicalsigni�cance of do�ng arc, do�ng of web, web condensation, Package formation: Forms of packaging, coiling, analysis of can drive.Motion transfer in card, draft and production calculations, card setting, signi�cance of setting.Card clothing: licker-in, cylinder, do�er clothing; card tooth geometry, Operational load on cylinder, �bre transfer e�ciency, carding process.Autoleveller in card: principle of autolevelling, type of autoleveller, type of autoleveller, correctionlength, Fibre con�guration in card sliver, mechanism of �bre hook and nep formation, cloudy web,Drawframe: Fundamentals of drafting, draft, ideal drafting, geometrical analysis of �bre movement in drafting.Objectives of drawing, Design features and working mechanism of drawframe. Drafting unit, drawing rollers, Drafting roller arrangement and its signi�cance, package formation, Autoleveller indrawframe, Sliver irregularity and its control.Theory of drafting, Vasile�’s model of drafting, drafting wave, Drafting force , draft vs drafting force,Roller setting: analysis of roller setting, in�uence of roller setting.Drawing process and its in�uence on �bre con�guration in sliver, Draft and production calculation.

TYPE OF COURSECOURSE DURATIONEXAM DATE

Rerun | Core | UG8 weeks (29 Jul’19 - 20 Sep’19) 29 Sep 2019

:::

391