YARN MANUFACTURING PROCESS
Fibres are twisted together to form a yarn. This
process is called as spinning. Spinning pro-cess includes all process from
cleaning the fibres to opening the bale for twisting of yarn.
The fibres are collected from various bales which
are mixed together and finally the yarn is produced. Simultaneously,
impuri-ties such as lint, dirt, seeds, leaves and stems are removed by the
machines (picker, break-ers and intermediates). After cleaning, the fibres are
loosen end and formed like a lap.
Lap is unrolled and drawn into a revolv-ing
cylinder, which contains fine hooks or wide bristles. These will pull the
fibres in one direction and form them into a thin film. It is known as carding.
This film is drawn into a funnel shaped opening. The yarn comes out in the form
of round rope like strand called sliver (Figure 4.3).
It is a process of straightening the fibre. Short
fibres are combed out. The long fibres are again formed into a sliver called
comb sliver (Figure 4.4).
In drawing process, several slivers are drawn
together. Slivers are drawn to form a single sliver of the same diameter (Figure
The combined sliver or condensed com-bined sliver
is taken to the slubber of a series of machines called Roving frames. A slack
twist is given to the yarn sliver (Figure 4.5).
Spinning is the next process after roving.
Spinning frame is made up with a number of spools. The roving passes through
the ring spinning mechanism, which is drawn again and twisted. Required size
and twist of yarn is obtained and wound on bobbins properly. Now bobbin is
ready to be used for weaving (Figure 4.6).