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Types Of Warp Knitting Machines

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Ferrari Kumar
Studying Textile Engineering at Anna University , Chennai
Ferrari Kumar
Ferrari Kumar

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  Types Of Warp Knitting Machines

Warp Knitting :Fundamentals Of Warp Knitting | Warp Knitting | Basic Warp Knit Structure | Knitting Elements | Needles and needle bar | Pressure Bar | Sinker and Sinker Bar | Guide and Guide Bar | Knitting Terms | Over lap | Under lap | Open lap | Closed lap | GUIDE BAR MOVEMENTS |  Swinging movement   | Shogging movement | Types of chain links| Types Of Warp Knitting Machines | Tricot Warp Knitting Machine | Tricot Warp Knitting Machine Features | Raschel Warp Knitting Machine | Raschel Warp Knitting Machine Features |Tricot Warp Knitting Machine Application | Raschel Warp Knitting Machine Application | Textile Study Center | textilestudycenter.com

  1. Warp knitting is defined as a loop forming process in which yarn is fed into knitting zone , parallel to fabric selvedge .
  2. In warp knitting , fabric is made by forming loops from yarns coming in parallel sheet form run in the direction of fabric formation . ( warp beam like in weaving )
  3. So that warping process is essential for warp knitting .
  4. Every needle is fed by a separate yarn for loop formation . In order to connect the loops into a fabric , the yarns are shifted between the needles .
  5. All the yarns will be knitted in course simultaneously.
  6. For the purpose of shifting yarn , guide will be used.

Warp knitting machines are flat and comparatively more complicated than weft knitting machines.


Types Of Warp Knitting Machines :

      1 .  Tricot machine

      2 .  Raschel machine

Tricot Warp Knitting Machine :

Features :

  1. Initially only bearded needles were used .
  2. Fine filaments are knitted .
  3. Machine gauge up to 24 to 40( here gauge is number of needles per inch)
  4. Fabric is pulled at right angle to needle .
  5. Sinker controlled fabric throughout the knitting cycle.
  6. Low fabric take down tension.
  7. Number of guide bars usually not more than four.
  8. Machine speed is high ( up to 3500 courses per min )
  9. Machines are wider and comparatively simple structures are produced .
  10. Warp beams are positioned at the back side of the machine .

 

Fundamentals Of Warp Knitting | Warp Knitting | Basic Warp Knit Structure | Knitting Elements | Needles and needle bar | Pressure Bar | Sinker and Sinker Bar | Guide and Guide Bar | Knitting Terms | Over lap | Under lap | Open lap | Closed lap | GUIDE BAR MOVEMENTS |  Swinging movement   | Shogging movement | Types of chain links| Types Of Warp Knitting Machines | Tricot Warp Knitting Machine | Tricot Warp Knitting Machine Features | Raschel Warp Knitting Machine | Raschel Warp Knitting Machine Features |Tricot Warp Knitting Machine Application | Raschel Warp Knitting Machine Application | Textile Study Center | textilestudycenter.com


Raschel Warp Knitting Machine :

Features :

  1. Initially latch needles are used .
  2. More versatile – number of guide bars up to 16.
  3. Suitable for outer wear and furnishing .
  4. Any type of yarn can be used .
  5. Fabric controlled by high take down tension .
  6. Sinkers hold fabric only when the needles raise .
  7. Fabric pulled at about 160 degree to needle . machines are made in coarser gauges 24 to 64 ( here gauge is defined as number of needles per two inch )
  8. Machines are narrower and comparatively lower speed ( up to 2000 courses per min )
  9. Warp beams are positioned at the top of the machine .

Fundamentals Of Warp Knitting | Warp Knitting | Basic Warp Knit Structure | Knitting Elements | Needles and needle bar | Pressure Bar | Sinker and Sinker Bar | Guide and Guide Bar | Knitting Terms | Over lap | Under lap | Open lap | Closed lap | GUIDE BAR MOVEMENTS |  Swinging movement   | Shogging movement | Types of chain links| Types Of Warp Knitting Machines | Tricot Warp Knitting Machine | Tricot Warp Knitting Machine Features | Raschel Warp Knitting Machine | Raschel Warp Knitting Machine Features |Tricot Warp Knitting Machine Application | Raschel Warp Knitting Machine Application | Textile Study Center | textilestudycenter.com

Advantages  :

  1. Due to the simultaneous knit , production rate will be much more higher than the weft knitting.
  2. The yarn is in criss-cross form to the adjacent wale line , so that dimensional stability will be much higher.
  3. Elongation of the fabric will be less.

Applications  :

Warp knitted fabric will be used for apparel ,fashion fabric and technical textiles.

Apparel : Mens formal

Technical textiles : Medical textiles and auxetic textiles .


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Ferrari Kumar
Studying Textile Engineering at Anna University , Chennai
Ferrari Kumar
Ferrari Kumar

Latest posts by Ferrari Kumar (see all)

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