Yaa How To Calculate Roving Hank Together With Its Cv%

How to Calculate Roving Hank in addition to Its CV%

Abeed Hasan
Dept. of Textile Engineering,
Khulna University of Engineering & Technology
Email: 1521033abeed@gmail.com

Introduction:
A roving is a long in addition to narrow packet of fiber. Rovings are produced during the physical care for of making spun yarn from wool fleece, raw cotton, or other fibers. Their psyche purpose is every minute fiber prepared for spinning, exactly they may every minute good live on used for specialized kinds of knitting or other fabric arts. Roving count is determined every minute publish of hanks of 840 yards acquaint inwards one lb.

Sliver Hank = Length of hanks of 840 yards / weight inwards one lbs

The coefficient of variation is reported every minute a per centum in addition to calculated from the average in addition to touchstone difference every minute follows:

Standard Deviation×100
---------------------------------------
            Average

Objectives of this study:

1. To decide the hank of Sliver.
2. To decide the hank of Roving.
3. To know the sliver in addition to Roving sample thickness.
4. To decide the relation betwixt count in addition to weight of Sliver in addition to Roving.

Theory:
At first, nosotros lead maintain to determine the count of Sliver in addition to Roving is compounded betwixt beam in addition to twine block. Generally the beam has one lb length of Sliver or Roving. So that the revolution to beam volition run one yards of Sliver or Roving.

Machine description:
There is a block Roller of the Front side of the m/c. The top side the tension is arranged .There is a count meter behind the machine. The Sliver or Roving is passed betwixt block roller in addition to tension roller.

Required apparatus:

1. Wrap block
2. Electric residual
3. Sliver or Roving

Experimental procedure:
At outset nosotros fixed the count zero. Then the sliver is passed through the block roller. Take yards of sliver in addition to weight it in addition to and hence decide the sliver hank. Let’s accept v times for average hank. We every minute good mensurate the touchstone difference in addition to co-efficient of variable. Similarly mensurate roving hank length vi yards every minute good decide CV%.

Experimental Data:
 
Table-1: Measurement of Roving Hank

Table-2: Measurement of Roving CV%

Results:
For roving the count of cotton fiber Roving 0.79645 in addition to CV% is 1.87.

Discussion:
In this Experiment, nosotros should live on careful nigh setting the sliver in addition to roving betwixt the guide in addition to rubbing guide of twine block. We should every minute good live on precaution nigh operating the twine block (clockwise). The weight of sliver in addition to roving should live on taken really carefully past times electrical balance. Finally the roving hank in addition to CV% should live on calculated.

Conclusion:
In this experiment, the Roving Hank in addition to CV% has been calculated. It volition live on really helpful inwards our time to come industrial life.

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