Knit Fabric Turning Process | Features of Fabric Turning Machine

Last Updated on 22/06/2021

Fabric Turning Process | Features of Knit Fabric Turning Machine

Rana Sohel
Executive Engineer
Sunman Textile Mills Ltd. Chittagong
Email: rsohel07tex@gmail.com

 

Fabric turning:
Normally turning is done for those fabrics which are not same in both face and back to protect the face side of fabric from any dust, spot, other colors, machine corrosion or any visual or physical disturbance. The machine by which counting of rolls and face/back side of fabric is opened is called turner machine. It is also called tubular fabric reversing machine. Inverting tubular knit fabric is the principal task of this machine. Fabric turner machine is used in batch section in textile industry.

Fabric Turning Machine
Fig: Fabric Turning Machine (Image: Textilelab blog)

Cross-sectional diagram of fabric Turning machine:

Cross–sectional diagram of Turning machine
Fig: Cross–sectional diagram of turning machine

Different parts of the fabric turning machine:

Different parts of turning machine
Fig: Different parts of turning machine

Special features of knit fabric turning machine:

  1. Fabric turning face side to back side by cylinder.
  2. Delivery per hours = 417 kg.
  3. A large cylinder present
  4. Two pipes for blowing air
  5. An engine inside of the machine
  6. Two rollers (for delivering the fabric) on the upper side of the machine.
  7. 3 buttons two for start two pipes individually the other is for stop the machine.

The necessity of turning:

  • To remove some dirt from the fabric.
  • To count the number of rolls.
  • To make back side of appearing on face side as required.
  • To make some identification on fabric.
  • To adjust all the rolls together with hand.

E.g. Some fabrics can be cut at the bottom side in fabric times and some are not (the fabric which are cut during turning is also cut after weight measurement at the top side of the fabric and also a card is supplied by the people who takes the weight of the fabric.

  • To make the back face side as required for a fabric.
  • To adjust all the rolls together with hand by knot for a nozzle.
  • They fulfill the turning row in process Route card and also fulfill the particular turning books. Then, it goes for sewing.

 Fabric turning table:

Which fabrics are turning by machine? Which fabrics are not turning by m/c?
  • Single Lacoste.
  • Double Lacoste.
  • 1×1 Rib.
  • 2×2 Ribs.
  • Lycra single jersey (Turn over by hand).
  • CVC Fleece (Turn over by hand).
  • 1×1 Lycra Rib.
  • Collar and Cuffs.

Special Note: -“CVC fleece” fabric is turned over by hand because, due to pressure of machine padder, it may be stained on fabric, which can create more problems during dyeing and brushing.

-Lycra single jersey Turning two times.

Calculation of fabric turning machine:

Considering point:

  1. Dwell Period
  2. Winch Speed
  3. Fabric Rope Length.

Duel Period:
Duel period is the cycle time during which total length of rope passes through the nozzle. Standard duel period is 2.5 to 3.0

……………………………… . ………..Fabric wt in kg×39.37×1000
Dwell Period = —————————————————————————————
………….. ……. …..Fabric width in inch× GSM× Nozzle no ×M/c Speed

……………………….Rope Length per Nozzle
Winch Speed = ————————————————–
………………………..Std. Cycle Time (2.5-3)

………………………………..Total Fabric wt x 100 x 1000
Total Rope Length = ——————————————–
…………………………………Tube dia x 2 x 2.54 x GSM

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