Card Fibre Transfer Test Pc-Program  ver 1.0





    1. Introduction

This Pc-program has been developed through research projects carried out in spinning mills. As a result of these mill works it has been found more important and useful than our expectations in terms of reducing carding waste, causes of carding waste, improving yarn quality especially evenness and finding out faulty running parts in carding.


Carding Machine in cotton and man made fibre spinning plays the most significant role in determining yarn quality in terms of evenness and strength.



Carding procedure is a repeating cycle of subsequent events these are


a) Lap feed by feed roll to taker-in then to cylinder

b)Carding by cylinder and flats and fixed flats

c)Web formation on doffer

d)Detaching of web by detaching roller

e)Feeding of sliver by card delivery roller


Although all the rotating parts run continuously sliver formation is realized by repetitive cycles and could be called as a Carding Cycle. Therefore variation in card sliver evenness could be analyzed as

a) Variation within cycle

b) Variation between cycles


Therefore to check the evenness of Carding Sliver should be done after determining the length of card sliver per Carding Cycle which is defined as Carding Cycle Sliver Length .


Main function of carding machine is to form a sliver to spin a yarn . In addition to these carding machine should achieve following points


Effectively removing of short fibres and non-lint materials

Parallelizing of fibres and straightening of hooks in fibres

Opening of fibre tufts into fibres to form regular web

Correcting and evening out in the chute feed lap weight variation along and across to get optimum sliver evenness.


It has been proven by many experimental results that Spectrograph CV values are related to short term regularity in card sliver does not affect yarn quality as much as variation values between and within Carding Cycle Sliver Length


1.2 Machine Card Input Data


Machine Card Input data consists of following items to be inserted to the data base.

Mach No :Machine Number

Lot No : Lot Number

Mach Type :Machine Type

Test Date : Test date

Lap weight: Gram/meter

Delivery Sliver :Gram per meter of sliver after calender roller i.e. before coiler

Delivery speed :Speed of calender roller m/min

Cylinder rpm : rpm

Doffer rpm : Rpm

Taker-in Rpm:

Detaching RPM :Detaching Roller rpm (Roller after Doffer)

and Diameters in mm of card feed roll ,taker-in(licker-in),cylinder,doffer, detaching roll and calender roll . For each machine connected Card Setting Data values.


2.0 Test Results

      Test Results

  1. -------------------------------------------------------

  2. Machine no :: 2:

  3. LotNo :: b:

  4. Machine type ::DK740:

  5. Date ::10/21/99:

  6. No of total tests : 51:

  7. ----------:----------:----------:----------:----------:-

  8. Speeds and carding

  9. ----------:----------:----------:----------:----------:-

  10. Feed cm/min : 157,080:

  11. Taker-in rpm : 800,000:

  12. Cylinder rpm : 412,000:

  13. Doffer rpm : 55,000:

  14. Doffer m/min : 120,951:

  15. Detaching roller m/min : 120,519:

  16. Delivery m/min : 125,000:

  17. Taker-in blow /cm -feed : 5,093:

  18. Carding/cm feed : 2,623:

  19. ----------:----------:----------:----------:----------:-

  20. Transfer functions parameters

  21. ----------:----------:----------:----------:----------:-

  22. Doffer/Calender Draft : 1,033:

  23. Weight of free fibres in g : 5,220:

  24. Carding sliver weight in g : 101,500:

  25. Carding time in sec : 1,296:

  26. Sliver length/cylinder 1 turn : 30,340:

  27. No of plies : 8,899:

  28. Carding -Cylinder/Feed cm : 2,623:

  29. Carding- Taker-in/Feed cm : 5,093:

  30. Sliver Length cm : 270,000:

  31. Residual Ratio % : 77,202:

  32. Transfer ratio % : 22,798:

  33. ----------:----------:----------:----------:----------:-

  34. Nominal Count G/m Sliver : 5,800:

  35. Min G/m : 5,400:

  36. Max G/m : 5,900:

  37. Mean deviation % : 8,621:

  38. Standard deviation : 0,172:

  39. A% : -2,966:

  40. CV% : 3,057:

  41. Average G/m : 5,628:

  42. Doffer lamda cm : 227,273:

  43. Carding Power : 0,642:

  44. Total k : 27:

  45. ----------:----------:----------:----------:----------:-

  46. Drafts

  47. ----------:----------:----------:----------:----------:-

  48. Feed-Taker-in : 400,000:

  49. Taker-in-Cylinder : 2,657:

  50. Cylinder-Doffer : 0,072:

  51. Doffer-Detaching : 0,996:

  52. Detaching-Calender : 1,037:

  53. Total Draft : 79,577:

  54. ----------:----------:----------:----------:----------:----------:----------:-

  55. Wave lengths

  56. Feed -:-Taker-in-:Cylinder--:Doffer----:Detaching-:Calender -:-

  57. 2500,00: 15,63: 30,34: 227,27: 55,56: 22,62

  58. 1250,00: 7,81: 15,17: 113,64: 27,78: 11,31

  59. 833,33: 5,21: 10,11: 75,76: 18,52: 7,54

  60. ----------:----------:----------:----------:----------:----------:----------:-

  61. Test L :Time s : g/m : aqsl :pqsl :

  62. ----------:----------:----------:----------:----------:-

  63. 10: 0,05: 0,900: 15,52: 10,52:

  64. 20: 0,10: 1,000: 17,24: 19,93:

  65. 30: 0,14: 1,300: 22,41: 28,35:

  66. 40: 0,19: 1,800: 31,03: 35,88:

  67. 50: 0,24: 2,000: 34,48: 42,62:

  68. 60: 0,29: 2,300: 39,66: 48,66:

  69. 70: 0,34: 2,200: 37,93: 54,06:

  70. 80: 0,38: 3,000: 51,72: 58,89:

  71. 90: 0,43: 3,400: 58,62: 63,21:

  72. 100: 0,48: 3,700: 63,79: 67,08:

  73. 110: 0,53: 3,700: 63,79: 70,54:

  74. 120: 0,58: 3,900: 67,24: 73,64:

  75. 130: 0,62: 4,100: 70,69: 76,41:

  76. 140: 0,67: 4,500: 77,59: 78,89:

  77. 150: 0,72: 4,200: 72,41: 81,11:

  78. 160: 0,77: 4,500: 77,59: 83,10:

  79. 170: 0,82: 4,600: 79,31: 84,88:

  80. 180: 0,86: 4,500: 77,59: 86,47:

  81. 190: 0,91: 4,800: 82,76: 87,89:

  82. 200: 0,96: 4,900: 84,48: 89,16:

  83. 210: 1,01: 4,700: 81,03: 90,30:

  84. 220: 1,06: 5,200: 89,66: 91,32:

  85. 230: 1,10: 5,000: 86,21: 92,24:

  86. 240: 1,15: 5,300: 91,38: 93,05:

  87. 250: 1,20: 5,100: 87,93: 93,78:

  88. 260: 1,25: 5,500: 94,83: 94,44:

  89. 270: 1,30: 5,400: 93,10: 95,02:

  90. 280: 1,34: 5,400: 93,10: 95,54:

  91. 290: 1,39: 5,400: 93,10: 96,01:

  92. 300: 1,44: 5,500: 94,83: 96,43:

  93. 310: 1,49: 5,400: 93,10: 96,81:

  94. 320: 1,54: 5,700: 98,28: 97,14:

  95. 330: 1,58: 5,600: 96,55: 97,44:

  96. 340: 1,63: 5,800: 100,00: 97,71:

  97. 350: 1,68: 5,900: 101,72: 97,95:

  98. 360: 1,73: 5,500: 94,83: 98,17:

  99. 370: 1,78: 5,600: 96,55: 98,36:

  100. 380: 1,82: 5,700: 98,28: 98,53:

  101. 390: 1,87: 5,600: 96,55: 98,69:

  102. 400: 1,92: 5,800: 100,00: 98,83:

  103. 410: 1,97: 5,600: 96,55: 98,95:

  104. 420: 2,02: 5,900: 101,72: 99,06:

  105. 430: 2,06: 5,500: 94,83: 99,16:

  106. 440: 2,11: 5,500: 94,83: 99,25:

  107. 450: 2,16: 5,900: 101,72: 99,33:

  108. 460: 2,21: 5,500: 94,83: 99,40:

  109. 470: 2,26: 5,500: 94,83: 99,46:

  110. 480: 2,30: 5,600: 96,55: 99,52:

  111. 490: 2,35: 5,700: 98,28: 99,57:

  112. 500: 2,40: 5,800: 100,00: 99,61:






3- Mill Practice of Card Fibre Transfer Test and Pc-Program


Card Fibre Transfer Test ver 1.0 Pc-Program has been effectively used in optimization in rotor spinning(material/spinning data) parameters to minimize costs as well as carded and combed cotton yarn manufacturing . The most important research finding was found to be Card Fibre Transfer Ratio % and yarn evenness correlation . Therefore ,improving of quality of yarn especially for knitted yarns this program contributes to improving of yarn evenness ,reducing carding waste , and correct maintenance of card clothing, settings



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