Analysis on the Defects in Yarn Manufacturing Process & its Prevention in Textile Industry
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To uniform feeding to the next stage such as carding machine.
Recycling the waste material.
4.1.2 Technical points in Blow room
Following are the technical points in the blow room:
Opening in blow room means opening the cotton in small pieces. The operation of opening means to
increase volume of flocks while the number of fiber in the flock remains constant. That is the specific
density of material is reduced.
If the size of dirt
particle is larger, it can be removed easily.
A lot of impurities and contamination are eliminated at the start of the process.
As much opening of cotton will be more, cleaning result will be more acceptable. But this cleaning of
cotton is done on the basis of high fiber loss. High roller speed gives more better cleaning effect but
also more stress on fiber. So roller speed is adjusted at a nominal speed so there should be well opening
of cotton and it does not effect of quality of fiber.
Cleaning efficiency of cotton is depending upon trash percentage. The cleaning efficiency is different
for different verities of cotton with same trash percentage.
If the opening of cotton is done well in initial stage then cleaning becomes easier. As surface area of
opened cotton is more, so therefore cleaning is more efficient.
In traditional method more number of machine are used to open and clean natural fiber.
If automatic bale opener machine is used, the tuft size of material should be as small as possible. In this
way more efficiency of machine is achieved and machine stopping time is reduced.
For the opening of cotton, use inclined spiked lattice (tray) at the initial stage always a better way of
opening of cotton with minimum damage.
Mechanical action on fibers creates some problems in the quality of yarn in the form of neps.
In beating operation by using a much shorter machine sequence, fibers with better elastic properties. In
this way spin ability can be produced.
Stickiness in the cotton affects the process very badly in the way of production and quality.
It is necessary to control the temperature inside the department, when use stickiness cotton.
Released of dust particles into the air occurs whenever the raw material
is rolled beaten or thrown
about. Accordingly the air at such position is sucked away. For the removal of dust perforated drums,
stationary drums are used.
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