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Find Out the Production of Jacquard Circular Knitting Machine

Find Out the Production of Jacquard Circular Knitting Machine
Raju Tex
Knitting Technologist,
B.J.Group, Mawna, Gazipur
Chittagong Textile Engineering College
Facebook: https://www.facebook.com/ERZRAZU




Jacquard circular knitting machine
A jacquard circular knitting machine is disclosed provided with a needle cylinder driving mechanism capable of optionally and readily controlling the rotary motion of the needle cylinder according to the pattern to be knitted.
Jacquard circular knitting machine
Jacquard circular knitting machine
A two-color jacquard fabric is to be produced, and the following machine and fabric data were assumed:

Example-1:

Values of circular knitting machine:
  • Machine diameter = 26”
  • Gauge E = 20
  • Number of feeders = 60
  • Machine speed = 27rpm
  • Machine efficiency = 80%
Values of article:
  • Structure: two colour jacquard (two part
  • Courses for one course)
  • Yarn: cotton yarn Nm = 50/1(80%), polyester filament yarn dtex = 67f14(20%)
  • Course density = 10.5courses/cm.
  • Wales density = 16wales/cm.
  • Fabric weight = 90gm/m2
We know that,

                                                                                       n X S X 60 X ŋ
Machine performance L in meter per hour = ………………………………………..
                                                                          feeders/course X courses/cm X 100


    27 X 60 X 60 X 0.80
= …………………………
      2 X 10.5 X l00

= 37 m/hr.

                                                D X π X E
Fabric width, WB in meter = …………………
                                              wpcm X 100

    26 X 3.14 X 20
= ……………………
        16 X 100

= 1.02m

                                                               L X WB X Weight in GSM
Machine performance in Kg per hour = ……………………………
                                                                            1000

    37 X 1.02 X 90
= …………………
           1000

= 3.396 Kg/hr

Example-2:
Values of circular knitting machine:
  • Machine diameter = 30”
  • Gauge E = 20
  • Number of feeders = 96
  • Machine speed = 23rpm
  • Machine efficiency = 80%
Values of article:
  • Structure: three colour jacquard
  • Yarn: polyester dtex = 150/1
  • Course density = 12courses/cm.
  • Wales density = 11wales/cm.
  • Fabric weight = 180gm/m2
                                                                                      n X S X 60 X ŋ
Machine performance L in meter per hour = ………………………………………..
                                                                          feeders/course X courses/cm X 100

    23 X 96 X 60 X 0.80
= ……………………………
         3 X 12 X 100

= 29.44 m/hr.

                                              D X π X E
Fabric width, WB in meter = …………………
                                             wpcm X 100

     30 X 3.14 X 20
= ……………………
          11 X l00

= 1.7m

                                                               L X WB X Weight in GSM
Machine performance in Kg per hour = ……………………………
                                                                            1000

    29.44 X 1.7 X 18
= ……………………
          1000

= 9 Kg/h

Example-3:
Calculate the production of a single-jersey circular knitting machine in kg/hr from the following data:

Values of circular knitting machine:

  • Machine diameter = 30”
  • Gauge E = 28
  • Number of feeders = 96
  • Machine speed = 35rpm
  • Machine efficiency = 80%
Values of article:
  • Structure: plain(Single jersey)
  • Yarn: cotton Nm 50/1(Ne29.6/1)
  • Stitch length = 0.25cm
   n X S X(π X d X E X stitch length in cm)X 60 X ŋ X 0.4536
= …………………………………………………………………………
                   100 x l00 X Ne x 840 x 0.9144

   n X S X(d X E X stitch length in cm.) X ŋ
= ……………………………………...........…… X 0.00001112598
                           Ne

   35 X 96 x (30 X 28 X 0.25) X 80
= ……………………………….....…. X 0.00001112598
                       29.6

=21.22 Kg. (ANS)

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