yarn production process/ spinning process

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  • Presentation On Yarn Manufacturing

    11/29/2014

    1

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • 11/29/2014

    2

    NAME:- ID No. :-

    Md. Yousuf Hossain. 120103063

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Fiber:- A unit of matter characterized by flexible,

    fineness, elasticity, sufficient strength and a high length

    to width ratio.

    e.g: Natural (Cotton, Jute, Wool, Silk)

    Manmade (Viscose, Polyester)

    Yarn:- Yarns are a grouping of fibers twisted together to

    form a continuous strand.

    e.g: Staple or filament yarn.

    11/29/2014 3

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Spinning:- Spinning is the process by which fibers are converted into yarn.

    Process flow chart of spinning- Cotton Bale Blowroom

    Carding

    Drawing

    Combing

    Drawing

    Roving/ Speed/ Simplex Frame

    Ring Spinning Yarn

    11/29/2014 4 Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Blowroom

    The section where the supplied compressed bale is turned into a uniform lap by opening, cleaning, blending or mixing.

    11/29/2014 5

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Functions of Blowroom:-

    Opening: Open the cotton bales.

    Cleaning: Eliminate dust, dirt, broken leaf, seed particles, grass.

    Blending / Mixing: By blending/mixing different types of cotton produce a comparatively good

    quality cotton.

    Lap Forming: Convert the opened and cleaned fiber into a sheet form.

    11/29/2014 6

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Flow Chart of Blowroom

    (Modern):

    Bale plucker

    Metal detector

    Uniclean

    Unimix

    Uni flex

    Vision shield

    Condenser

    Chute feed

    Carding

    11/29/2014 7 Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Carding

    Carding is the reduction of entangled mass of fibers to filmy web by working them between two closely spaced relatively moving surfaces closed with sharp points.

    11/29/2014

    8 Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Functions Of Carding Machine

    To remove the small trash particles.

    To give some degree of blending.

    To eliminate the remaining impurities.

    To produce a thick untwisted rope of fibers called sliver.

    Reduction of neps.

    Fiber orientation.

    Elimination of short fibers.

    11/29/2014 9

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Carding

    Main Parts:

    Taker-in: The region from lap roller upto cylinder is known as taker-in.

    Cylinder: The cylinder get opened with sharp teeth and then pass over to doffer.

    Doffer: The doffer take the cleaned cotton.

    11/29/2014 10

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • 11/29/2014 11

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Combing

    The process of

    straightening or

    parallelizing of fibers

    and removing of short

    fibers and impurities

    by using brushes and

    rollers is called

    combing.

    11/29/2014 12

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Objectives of Combing

    To remove naps in the carded sliver.

    To make the fiber more parallel and straight.

    To produce a uniform sliver of required per unit length.

    To remove the fiber shorter than a predetermined length.

    To remove remaining impurities in the comber lap.

    Formation of sliver having maximum possible evenness.

    11/29/2014 13

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Drawing

    Drawing is the

    process in which the

    slivers are blended,

    doubled, leveled and

    drafted by passing the

    slivers through a

    series of pairs of

    rollers.

    11/29/2014 14

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Function Of Drawframe Machine

    To straighten the crimped and hooked fibers.

    To achieve a fairly through parallelization of the fibers.

    To improve the short, medium and long term unevenness of the slivers by doubling.

    To produce a more uniform sliver.

    To reduce the weight/unit length of the card sliver.

    11/29/2014 15

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Roving/Speed/Simplex Frame

    Simplex is an intermediate process in which fibers are

    converted into low twist lea called roving.

    11/29/2014 16

    Operations Involved in Simplex Machine:

    i. Creeling

    ii. Drafting

    iii. Twisting

    iv. Winding

    v. Building

    vi. Doffing

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Functions Roving/Speed/Simplex Frame:

    To prepare the package for the R/F.

    To draft the sliver to reduce weight per unit length.

    Insert small amount of twist to give required strength of roving.

    Wind the twisted roving on to the bobbin.

    Build the roving in bobbin such a form which will facilitate handling, withdrawing & transfer to the next process.

    11/29/2014 17

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Ring Frame

    Spinning process is done by the Ring frame machine. Ring frame

    converts the bobbin into yarn.

    11/29/2014 18

    Functions of ring frame:

    Draft the roving until the required fineness is achieved.

    Twist the drafted strand to form yarn of required count and

    strength.

    Winding the twisted yarn on to the bobbin for suitable storage,

    transportation and further

    processing. Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Advantage of Ring Spinning System:

    i. Any type of material (fiber) can be spun.

    ii. Wide range of count can be processed.

    iii. It delivers a yarn with optimum characteristics.

    iv. Idealized twisting system.

    v. It is uncomplicated and easy to operate.

    vi. Higher yarn strength can be achieved

    Disadvantages of Ring Spinning System:

    i. Low production.

    ii. Machine generates more heat .

    11/29/2014 19

    Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

  • Thanks To All For Watching

    This Presentation.

    11/29/2014 20 yousuf_te@yahoo.com

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