In The Name Of ALLAH, The Most Gracious,The Most Merciful.

Department of Textile EngineeringMehran University of Engineering & Technology Jamshoro

UNCONVENTIONAL METHOD

OF WEFT INSERTION

DANISH RAJA

12TE62

ASSIGNED BY :- SIR MAZHAR HUSSAIN PEERZADA

PRESENTED BY:-

METHOD OF WEFT INSERTION IN SHUTTLEES WEAVING MACHINES

SHUTTLE LESS

SOLID FLUID INERTIA

PROJECTLE RAPIER

WATER AIR

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.

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.

2)RAPIER:-

A Rapier loom use a Rapier to pull the weft yarn across the loom.

RAPIER CAN BE SINGLE OR DOUBLE.

Single Rapier:-For a single Rapier a long rapier device is required to extend across the full width of warp.

Double Rapier:-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

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.

DRAW BACK;-

Air jet loom cannot produce great variety of fabrics.

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 ..

DRAW BACK:-

In water jet unit use vacuum suction & heat to remove water from the fabrics.

Only use for Hydrophobic fibres.

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