Unconventional method of weft insertion

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Unconventional method of weft insertion

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Unconventional method of weft insertion

  1. 1. In The Name Of ALLAH, The Most Gracious,The Most Merciful.
  2. 2. Department of Textile Engineering Mehran University of Engineering & Technology Jamshoro
  3. 3. METHOD OF WEFT INSERTION IN SHUTTLEES WEAVING MACHINES SHUTTLE LESS
  4. 4. 1) PROJECTILE(GRIPPER):- The picking action is accomplished by a small Bullet like Gripper(Projectile), which grips the weft yarn & carries it through the shed. Several gripper are normally used in the loom , while one is crossing the loom with the weft yarn, the others are return to the starting position. The return by conveyer chain.
  5. 5. DRAW BACK OF PROJECTILE:- The dragging of the weft yarn across a loom creates strain on the yarn so projectile loom are not suitable for weak yarn.
  6. 6. 2)RAPIER:- A Rapier loom use a Rapier to pull the weft yarn across the loom. For a single Rapier a long rapier device is required to extend across the full width of warp. Two rapier enter the shed from opposite side of loom & transfer the weft yarn from one rapier to another rapier near centre of loom. Double Rapier further divided into two categories 1) Flexible Rapier & 2) Rigid Rapier
  7. 7. 3) AIR JET ;- In this weft yarn across the loom by using high speed(compress) of air . Nozzle are used to insert the weft yarn into the shed. The Fabric width of Air Jet loom is normally narrower than Rapier or Projectile loom.
  8. 8. DRAW BACK;- Air jet loom cannot produce great variety of fabrics.
  9. 9. 4) WATER JET LOOM:- In this water is shoot under high force & with it a weft yarn. The force of water as it propelled across the shed cross the yarn to opposite side .. In water jet unit use vacuum suction & heat to remove water from the fabrics. Only use for Hydrophobic fibres.
  10. 10. ALWAYS REMEMBER ME IN YOUR PRAYERS…..

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