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The Adaptive Relay Valve D rive

(ARVD) for Picanol's OM NIp/us

800 air-jet weaving machine

ers air consumption and

tts reduces energy costs.

F abric manufacturers are underpressure more than ever. Weaversaround the world are fightingagainst higher costs in terms of

labor, raw material, production timeand reduced energ\' consumption toremain competit ive. In turn, the

machinery suppliers are challenged toprovide up-to-date machiner^'.

In times of increasing energ)' costs,it is of utmost interest for fabric pro-ducers to use weaving machines thatoffer reduced energy consumption.

Adaptive Relay Valve DrivePicanol NV, Belgium, provided the

following information about i tsAdaptive Relay Valve Drive, which isfeatured on its OMNlplus 800 air-jet

weaving machine:

Adaptive Relay Valve Drive(ARVD) automatically adapts theclosing timing of the relay nozzlevalves to the behavior of the fillingyam. Instead of appKing one settingfor all the different picks, ARVDapplies the best relay valve timingfor each individual pick, thus reduc-ing the overall air consumption.

At each insertion cycle, thewinding timings from the pre-

Textite World presents

some recent technologies

that provide improved

efficiencies in the weaving mill.

By Jurg Rupp, Executive Editor

winder are compared with a refer-ence value by the mach ine's micro-processor. Since the fi l l inginsertion speed varies from onepick to another, it is not necessar}'for the relay nozzles to blow forthe same amount of time at eachpick. Consequently, the machineadapts the closing timings for therelay nozzle valves automatically.

For a fast pick, the relay nozzlevalves do not stay open very long.... For a slow pick, they stay openlonger. ... This is done from thesecond relay nozzle valve onwards.

Picanol notes that decreased airconsumption reduces energ>' costs,and reduced blowing on the fillingyarn reduces the number of brokenpicks. Also, Pick Repair Automationhas a higher success rate because the

type of filling stops changes.

Air-Jet WeavingItaly-based Itema Weaving has

recently upgraded its Sulzer Textir'^'L5500 a ir- je t weaving m achin e ,suited primarily for applications suchas quality apparel and home textilefabrics made with natural or man-made fibers or blends.

Key benefits of this machine aresaid to be the fabric quality and lowrunning costs. According to ItemaWeaving, the L5500's strength is itscompetitiveness in terms of its capac-ity to conveniently weave fabricsthat comply with superior qualitystandards, while also maintaining ahigh degree of efficiency even at topperformance levels . The companyadds that "conveniently" also means

producing with reduced off-qualityrates and reduced air consumptionper meter of fabric, which improvesprofits. T\^e L5500's RTC (Real TimeControl ler) funct ion enables themachine to adapt to various weavingconditions, thereby obtaining signifi-cant air-consumption savings.

Targeted customers are weaversinterested in superior production toenable entrance into new, highlyprofitable markets. The L5500 can be

ada pted to different pro duc t ion

J6 JANUARY/FEBRUARY 2010 TextiteWorld.com

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requirements. Easy operation, w idestrange of application and shortest set-

t imes-ate-key-^ctors..

Recent upgrades in the L5500technology have increased themachine 's effic iency and perfor-mance. For standard weaving, themaximum speed now is 1,200 revolu-

tions per minute, and the maximumweaving width is 4,000 millimeters(mm). This is equal to a productioncapacity in excess of 2,500-meters-per~minute weft insertion rate.

Drawing-in: AnIm portan t Cost Factor

Switzeriand-based Stäubli AGreports that automatic drawing-inmachines for the weaving harness havelong helped weaving mills around the

world stay competitive. Automaticallydrawn-in warps are characterized byzero defect and high quality, and tiieyare available as required for productionn a fraction of the time compared with

manual drawing-in.

According to S täubli, the upgradedSafir automatic drawing-in machine

ffers new opportunities regardinglexibility, thanks to the refinement of

elta line combined with establishedtate-of-the-art technologies, particu-arly the Opal leasing machine. Sincets introduction at ITMA 2007 in

unich, Germany, and after severalpgrades, the machine can be config-

s the yam to be drawn in du ring

ing-in of double threads or Ihreads of the wrong color.

S t ä u b l i

be handled freely. H eddle distribu-tion can be programmed on upto 28 fram es. It also is possible touse two different types of dropwires for the same weaving harness— an application that is especiallyi n t e r e s t i n g f o r t e r r yw e a v i n g

with upperbeams andv a r y i n gdrop wireweights forthe groundthreads and

Stàubti's upgraded Safir

au tomat ic drawing- in mach ine

can be configured to draw in one or

pile threads.With virtuallyunrest r ic ted appl ica t ionpotential, Stäubli says Safir sets newstandards in automatic drawing-in.

The machine also features user-friendly ergonomics and convenientoperation u sing a color touchscreen.

Warp-tying is another cost factorin the weaving mill. Stäubli reports itsMagma warp-tying machine is espe-cially suitable for tying coarse yams.A patent-pending system that workswithout yam-specific settings enablesseparation of threads to be tied at thelease, which considerably simplifiesoperation and changing from oneapplication to the next. A built-incamera system monitors the separa-tion of the threads, thus eliminatingdoubled threads. MagiTia also can beset easily to tie double knots, andtherefore can tie even very slick yamsreliably, according to the company.

The Magma warp-tving machinefor coarse yarns complements

tw o w arp beams, each having up to eight thre ad layers.

Stäubli's Topmatic t^ing machine line.The machines feature a new, patentedseparating system that reliably sepa-

rates threads from the lease com-pletely without using thread-specificsepara t ing e lements and wi thoutmaking special adjustments. Opticalsensors check every separated yarnpair before tying, thus preventing afalse double yarn from being tied. Thefault can be corrected simply.Depending on yam material, single ordouble knots can be tied, as selectedby a simple push of a button. Opti-mization of the tying rate is accom-plished using the adjustment wheel.

Magma can tie a range of yarnsincluding wool, cotton, linen andother staple yams, as well as mono-and multifilaments, polypropyleneribbons, and many other yam types.The yarn count for staple fibersranges from Ne 0.3 to 50 for warpswith 1:1 lease. The machine comes

equipped with an optical dou-

Itema Weaving'sSulzer Textil" L55OO air-jet b le -y am sensor, and single or

machine features several recent upgrades. d o u b le k n ot s ca n be sele cte deasily. The length of knot

ends is variable, with aminimum of 5 mm.

The tying framecan be used onall Stäubli type

TPF3 tying frames,and easy mainte-nance is guaran-teed, with onlyregular lubrica-

tion needed. GQ

Textile World JANUARY/FEBRUA RY 2010 37