Determent Of The Denier Count Of Cotton Yarn By Using Warp Reel & Electric Balance

Introduction: Count is a numerical process which defines fineness or corners of yarn. Count is a number indicating the mass per unit length or per unit mass.

There aretwo types of count

1. Direct
2. Indirect

Objects:

• To know about yarn count
• To calculate yarn fineness
• To calculate yarn consumption
• To maintain the buyer requirement
•  

Workingprinciple: We know about denier count is a direct count system. In a direct system the yarn number or count is the number of units of weight per unit length.

 Denier count: The weight of a fixed length 9000m of yarn is determined as the weight per unit length is the yarn count. So mathematically,

N =(W×l)÷(W×L)

Where,

N = Yarn Count

L    = Sample length

L   =Unit of length

W   =Unit of weight

W   =sample weight

Machine Description: In this experiment we saw that this machine contains more bobbin, one tension and yarn taker. The warp Reel is used to measure the length of yarn. This yarn is taken by a wheel where the circumference is 1.5 yards Electric balance is used to determine the weight of cotton yarn and we also use one bobbin carrier.

warp reel

Apparatus:

1. Bobbin carrier
2. Yarn package
3. Yarn tension
4. Handle
5. Wrap Reel
6. Electric balance
7. Steel bar

Working Procedure: In this experiment at first we have taken a yarn package and put it on the bobbin carrier then. The yarn passed through the yarn tensioner to wrap reel then we start moving the handle wheel and it is moving 80 times then we found our desired one then we complete the calculate and found the count CV% controlling working action etc. Before calculation we weight the desired yarn finally. By this value we draw the graph of control limit.

Calculation: From table 1 count N

We know that N =(sample weight ÷ unit of weight) × (unit of length × sample lenght)

So ,

N1 = (2.11gm÷1gm) × (9000m ÷ 109.2)=173.90

N2 = (2.12gm÷1gm) × (9000m ÷ 109.2)=174.72

N3 = (2.10gm÷1gm) × (9000m ÷ 109.2)=173.07

N4 = (2.13gm÷1gm) × (9000m ÷ 109.2)=175.54

N5 =  (2.12gm÷1gm) × (9000m ÷ 109.2)=17.72

Average count: =174

From table 2:- SD = 0.76

CV% = 1.22%

CL = 174

UCL = 213.51

LCL = 134.42

UWAL =200.38

LWAL = 147.61

Table 01:- Table for average count 

  

Obs no	Sample length	Length unit	Sample weight	Weight count	Count	Average count
1	120	9000	2.11	1	173.90	174.39
2	120	9000	2.12	1	174.72
3	120	9000	2.10	1	173.07
4	120	9000,	2.13	1	175.54
5	120	9000	2.02	1	174.72

Table 2:-Table for efficient of variation

Obs no	count	Average count	(Xi-X)2	SD	CV%
1	173.90	174	0.01	2.125	1.22
2	174.72		o.51
3	173.o7		0.86
4	174.54		0.37
5	174.72		0.5

Table 3:- table for controlling Value

UCL	UWAL	CL	LWAL	LCL
213.61	200.38	174	147.61	134.42

NO OF EXPERIMENT

Result: The selected cotton yarn is 174 and the value of co-efficient variation is 1.22%

Remarks: In this experiment we know about the Denier count system and it is helpful in our working life and to be a good textile engineer, we must know it very well.

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