ring

How a Spinning Mill Works (Complete spinning mill process)

This is a process of converting raw cotton into a more usable form.

In the first stage, raw cotton is mixed with water in order to remove dirt and impurities. The mixture is then sent through a series of machines called ‘blow room’ and ‘carding’. In the blow room, air is blown to make the cotton fluffy. This process makes it easier for the carding machine to separate out fibers of different lengths. The carded fiber is then compressed into slivers which are spun together to form yarns.
Spinning is a process that converts raw materials, such as cotton, wool, or flax, into a continuous strand of yarn. The process is carried out in four steps: carding, drawing out, spinning and twisting.

Below are the details of some major sections or departments used in a spinning mill to convert the fiber into yarn.

CARDING
In the carding process the raw material is first broken down into small pieces and then it is cleaned from the impurities like trash, dead fiber, dust and dirt. After this cleaning process the cleaned cotton is converted into sliver form. This sliver is stored and carried forward to the next section in canes.

DRAWING
The carding machines separate the raw material into a web of long fibers called sliver. The process starts by drawing slivers from the carding machine. The slivers are then taken to the drawing machines where this sliver is reprocessed to make it softer, straight and variation is decreased by using several canes of sliver into one row.

COMBERS
It is a process in which the fibers are passed through a series of rotating brushes. The brushes pull out the shorter fibers and leave behind the longer ones, which are then wound onto bobbins in the forms of laps.
The most common type of machine used for combing is called a comber.

SIMPLEX
The simplex frames pull the slivers out to make them thinner and longer, while being twisted together to form roving.

RING
The roving is then taken to the spinning frames where it is stretched out and twisted together even more tightly to produce yarn. In the spinning mill process, yarn is spun into thread by a spinning machine. The spinning machine is called a ring frame and it includes four parts: the spindle, the flyer, the bobbin and the doffer.
The spindle is attached to a rotating drive shaft that is powered by an electric motor. The flyer is a large rotating cylinder with many slots in it that catches thread as it comes off of the spindle. The bobbin holds all of the thread coming off of the flyer and stores it until it can be wound onto a small container called bobbin

AUTO CONE / WINDING
Then the yarn bobbins are converted into big yarn cones to their final shape.

PACKING DEPT
Then these cones are brought to the packing department. Packing is being done in both mechanical and manual form. most common packing are carton packing, PP bag packing and pallets.

Author: Afzaal Khadim Khan
Owner: Textiles Bar
Lahore Pakistan

What is difference between ring spun, open end and Autocoro yarn

Ring spun yarn is a better quality yarn with higher prices and higher cost of production as compare to open end or Autocoro yarns.
Ring spun yarn factory consist of the following manufacturing processes.
1. Blow Room.
2. Carding.
3. Drawing.
4. Combers or Combing process.
5. Simplex
6. Ring
7. Winding or Auto cone department
Above is the complete spinning or yarn manufacturing process engage in the ring spun yarn production.

The open end or Autocoro is same till Drawing process but after that all work is done by rotor machine which decrease the production cost but at the same time as high draft is given so the quality of yarn suffered due to high draft. This factor also affects the quality of yarns. In ring we hae wide range of options for yarn counts but in open end or autocoro we can produce limited number of yarn counts.

Following processes are engaged in open end or autocoro yarn manufacturing.
1. Blow Room.
2. Carding.
3. Drawing
4. Rotor machines.