Sunday, September 14, 2014

Knitting Calculaton|| Single joursey production Calculation

9:06 PM

Hello guys, What about you? hope that well. ok today we discuss about how to calculate fabric production per hour or per day in Knitting  machine and obiviously that be single joursey fabric. ok i will show you two system to calculate the production...
                         

For calculate production per hour or per day we need to have the following data....
Machine Gauge
Machine Dia in inches
Number of Feeders
Machine RPM
Yarn Count
Stitch length in mm
Efficiency

As a example we have the following data..

 Machine Gauge 28
Machine Dia 30 inches
Number of Feeders 96
Machine RPM 26
Yarn Count 30
Stitch length 4 mm
Efficiency 90%


 Then first system of calculation is......
First we will calculate number of needles and number of stitches produced in one revolution. This would help us in calculating the total length of yarn consumed in one revolution.
Number of needles = machine dia * gauge *(3.14)
                          = 30*28*3.14
                          = 2637.6
                          =2637 (As needles are always in even number)

Every needle is making one stitch on every feeders because machine is producing single jersey fabric (full knit fabric).
Number of stitches produced in one revolution = Number of needles * number of feeders
                                                      =2637*96
                                                      = 253152
This figure shows that machine is making 203400 stitches in one revolution.

Length of stitch is 04 mm (stitch length is always calculated in metric system)
From this figure we can calculate yarn consumption in yards in one hour
Yarn Consumption (in yards) in one hour
= number of stitches * length of (mm) * RPM *60 (minutes)/
1000(to convert mm into meters)

=253152*4*26*60/1000
= 1579688 meter or 1721860 yards

Weight of cotton yarn = length of yarn Count/count * 840
                          =1721860/30*840
                          =68.32 pounds
                          =68.32/2.2046kg = 31
   Efficiency 90% so actual production is 27.9 kg in per hour and we can calculate per day production or per shift production by multipi the value with 24 or 8.

And now the 2nd system is more easier and more short...
Length of yarn =3.14*Machine Gauge*Machine Dia in inches*Number of Feeders *Machine RPM *Stitch length in mm*Hour*Efficiency/1000*100

So length =3.14*28*30*96*26*4*60*90/1000*100
           =1422025 meter
           =1422.025km

we know that Ne*tex=590.6 

So Tex= 590.6/ne   Tex=590.6/30=19.68 Tex

Now 1km weigth=19.68 gm
so 1422.025km weight= 27994.23 gm
                           =27.99 kg
 
Now we can calculate per day production or per shift production by multipi the value with 24 or 8.
 Ok guys.Thank you all for reading my article.







Writer and editor

I am Nur Mohammed From comilla,Bangladesh.I studied in Textile Engineering and very much fond of blogging; so try to write about Textile

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