new developments of weaving machines

8/2/2019 New Developments of Weaving Machines

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NEW DEVELOPMENTS OF WEAVING

MACHINES


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DEVELOPMENTS IN RAPIER

WEAVINGOverall machine Developments

Production (Speed ) rate (up to 1500mpm or 600 to 800 rpm)without scarifying their special status of flexibility

The design improvement in Rapier gripper permits handling widerange of yarns without any need for changes.

The machine owes its speed, flexibility and low energyconsumption to a combination of high technology andeconomic design.

Style changes can be executed Exceptionally rapidly'. havingindependent motor drives, this yielded fewer moving parts, fewergears, fewer oil seals and no timing belts.

No toothed belts, which are prone to wear, and breakage.


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SUMO MOTOR DEVELOPMENTS..

Saving on energy consumption of more than 10%in comparison with conventional clutch and brakeconfiguration.

Machine speed setting is done accurately andcompletely, electronically via microprocessor. Thisreduces the setting time.

Speed setting is easy to copy to other machine

either with electronic set card or with productioncomputer with bi-directional communication.

Automatic pick finding device reduces the downtimes for repairing filling and warp breakages.


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Electronic take-up and let-

off motion.. Required pick density can be programmed on

microprocessor keyboard. No pick wheel required.

The accuracy of settings make it easy to adjust

pick density of fabric with optimum fabric weightand minimum yarn consumptions

The electronic link between let-off and take-up isan additional tool to manage the fabric marks.

Warp beam driven by electric let off motionthrough separate drive wheel that stays on loom,ensures trouble free operation of let-off systemand improve fabric quality.


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Filling Detection units

The system detects short picks, reboundingfillings and prevent faults in fabric at rightend.

At filling breaks, the machine stops and onlythe harness are moved automatically to freethe broken pick for removal of weaver.


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Stop motions.

Weft break detectors) work on the piezoelectric principle

It is instant detection of a weft fault Work with all types of yarns

Can monitor the yarn at a low tension

Insensitive to dust and dirt Reliable


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Multiphase Weaving

There is a warp wise shed formation in thisinstead of weft wise shed formation as foundin the other weaving systems.

can insert four weft yarns simultaneously at aconstant uniform yarn velocity of 22 m/s withminimal weft loading.

can go up to a maximum of 5500m/min ofweft insertion rate.


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Features

Beat-Up

The combs located behind shed forming element perform the function ofconventional reed. The lower shed, which rises after insertion of weft, lifts theweft out of channel over the entire weaving width. The beat-up comb thencatches the weft and beats up.

Weft insertionThe channel in the shed forming elements guide in insertion of weft. The weft isinserted by nozzles are similar to airjet weaving. Additional nozzles betweenshed forming elements further support the weft. Four wefts are inserted at atime. The weft measuring, clamping, cutting, sensing and controlling are similarto air-jet machines.

Shed Formation

The warp yarns pass over rotating weaving rotor and shed forming elementsselect and lift warp yarn for shed formation. The curve shape of the elements,rotation of rotor and movement of warp positioners help in selection andformation of shed by controlling the motion of warp positioner. The weaveselection is made possible


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Advantages

Minimum specific energy consumption

Small footprint

Reduced room air treatment requirement andless dust production (made possible by theintegrated Dust extraction system and airconditioning system)

Substantially lower noise emissions

20 to 30 percent lower production costs


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AIR JET WEAVING MACHINE

OMNI plus 800 air jetweaving machine

Dornier air-jet weaving machine

Sultex L5500 air-jet weavingmachine


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Draw Backs

Limited speed of 1000-1500 rpm.

Higher energy consumption.

Weft insertion is not always accurate

When apply brakes the tension peak in weftcausing breakages.


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New Developments

Energy-efficient Sumo motor

Modified Picking mechanism

Slim Through light Sensor Pneumatic catching device (PCD)

Real Time Controller(RTC)

Automatic Pick Controlling device Electronic Braking System

New air supply system

Tapered Tunnel Reed


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Energy-efficient Sumo motor Energy saving

Dissipate less heat

Speed of the motor is controlledelectronically

The machine is up to full speed right from thevery first pick.


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Modified Picking mechanism

Multi nozzles are divided into two zones &connected with separate tanks directly.

Automatic timing control (ATC)

Independent pressure tanks

Microprocessor keyboard

Slim Through light Sensor weft stop sensor

Can easily be positioned

Can use for darker shades


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Pneumatic catching device (PCD)

Catches the weft yarn once it reach the right-hand side of the fabric

Reduction in air consumption

Real Time Controller(RTC)

an active control system influencing the

current weft insertion rate, optimizing thenozzle blow times

Minimal air consumption


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Automatic Pick Controlling

device Instantly corrects the main nozzles air pressure

during full cheese changes.

Nozzle air jet pressure is adjusted automatically.

Electronic Braking System

Precisely control Braking time

Brake stroke


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New air supply system

Nozzle

Tandem nozzles

Tapered sub nozzles

Diamond like coating

Extends their lifetime when using abrasive yarns. Reduce air consumption


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Tapered Tunnel Reed

Introduced tapered shape to the reed. Prevent air dispersion.

More stable picking

Less air consumption during

picking.


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Other Developments

Pneumatically controlled Self-threading

Electronically controlled weft cutter Pneumatic tucking in devices


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new developments of weaving machines

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