new developments of weaving machines
TRANSCRIPT
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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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