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Classification of Shuttle-less weaving Vignesh Dhanabalan - [email protected]
10

Classifications of shuttless weaving

Apr 14, 2017

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Page 1: Classifications of shuttless weaving

Classification of Shuttle-less weaving

Vignesh Dhanabalan -

[email protected]

Page 2: Classifications of shuttless weaving

Vignesh Dhanabalan -

[email protected]

Page 3: Classifications of shuttless weaving

◦ Partially guided solid carrier ( Projectile loom)

◦ Fully guided solid carrier (Rapier loom)

◦ Fluid carrier Air jet lom

Water jet loom

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Vignesh Dhanabalan -

[email protected]

Page 4: Classifications of shuttless weaving

PROJECTILE LOOM

Also called missile loom as the picking action is done by

a series of small bullet like projectiles which hold the

weft yarn and carry it through the shed and then return

empty.

20 and 60g in mass.

Projectile loom can produce up to 300 ppm and is less

noisier then the shuttle loom. Vignesh Dhanabalan -

[email protected]

Page 5: Classifications of shuttless weaving

RAPIER LOOM

fork-like opening

Handing over of weft yarn from one head to the other at centre of warp shed.

Subsequently both heads move back in opposite directions.

Vignesh Dhanabalan -

[email protected]

Page 6: Classifications of shuttless weaving

AIR JET

w

a

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r

J

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t

Energy is stored in fluid

through compression.

The released energy

propels weft along with a

certain amount of fluid.

Vignesh Dhanabalan -

[email protected]

Page 7: Classifications of shuttless weaving

Shuttleless Loom.

Insert weft yarn by means of projectile, rapier, air and water jet

Weft yarn is

placed outside

the weaving

loom.

The speed is

faster, quiet and

better fabric

quality

Page 8: Classifications of shuttless weaving

COMPARISON OF SHUTTLE AND SHUTTLELESS LOOMS

110 to 225 picks per minute (ppm).

weave 2 to 4 times as much as

conventional looms

The physical and mental strain

upon the weaver is less.

Strain upon the warp threads is reduced due to

smaller depth of shed.

Laborious process

Ware and tear is high owing to

high maintenance cost.

• The shuttle sometimes leads to abrasion

on the warp yarns and at other times

causes thread breaks.

Page 9: Classifications of shuttless weaving

LIMITATIONS OF SHUTTLE LOOM

Unit-I / Shuttleless Weaving/ Vignesh Dhanabalan 9

Shuttle looms are limited as long as their fundamental constructions involved in the

use of

shuttle propulsion

power required for picking is proportional to the cube of the loom speed

• loom speed is increased from 200 to 300 picks per minute, the power

requirement would increase by a factor of (3/2)3 i.e. 3.4 times approximately

The above results are show the following disadvantages:

1. Greater strain imposed on the picking mechanism, thus rendering it liable to frequent

failure.

2. Greater amount of noise and vibration.

3. Because of superior energy in shuttle, greater strain is again imposed on the

checking mechanism.

4. The movement of shuttle will be more difficult to control and there will be a greater

possibility of its escape from the loom.

Page 10: Classifications of shuttless weaving

MACHINERY

Loom speed

Weft insertion rate

loom width

Machine down time

Yarn breakage rate

Loom

Type

Loom

Width

in cm

Speed

in rpm

WIR

(MPM)

Conventional

Power loom

180 180 300-400

Projectile

loom

180-540 300-450 700-1500

Rapier-Rigid 150-400 300-550 1000-1200

Rapier-

Flexible

110-420 325-550 1000-1300

Water Jet 150-230 1000 1600-2000

Air Jet 190-430 500-

1100

1200-2520

Linear

Multiphase

190 1100-

1600

2000-3000

Drum type

Multiphase

170-190 2430-

3230

4000

(Twill)&

6000

(plain)

Unit-I / Shuttleless Weaving/ Vignesh Dhanabalan

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