RSB-D 50 DrawFrame – A New Dimension in Productivity, Quality and Operation

The new single-head draw frame generation ischaracterized by its performance: productivity increase of up to 33 %, reduced energy costs, quicker lot change at out standing sliver quality and easy, intuitive operation.

In thefallof 2016, Rieterintroducedthenew RSB-D 50 single-head draw frame for the firsttime to a global audience attheexhibitions ITMA Asia in China and ITME in India (Fig. 1).Thenewdrawframegenerationexcelswith a multitudeofinnovativesolutions. These reducecosts, increasethequality and simplifyoperation and maintenance.

RSB-D 50 drawframe – highest productivity with 1 200 m/min delivery speed.

Energy saving drive conceptECOrizedwith 25 % fewer belts

With the patented drive conceptECOrized, 25 % ofthebelts and drive elements as well as thedifferentialgear are savedcompared to theprevious model. Twoservo-motors drive thedraftingsystem. Uniquefeatures are thefrequency-­controlled drive forthesuction and theindividual drive forthecoiler. Thenew drive solutionforthecoilerleads to straightbelttracking and a far longerlifetime (Fig. 2).Thequietmachineis evidence ofthelowabrasion.

The servomotor forthecoilerallows rapid optimizationofthe speed

Lowerelectricitycosts per year

Thenew drive solutiongeneratesyearlysavingsofapproximately Euro 1 000 foreach RSB-D 50. Ifthesavingoverthelifetimeofthemachineiscomparedwiththeinvestment, a very attractive ratio results.

As a standard feature, thedrawframes are nowequippedwithintegratedenergymeasuring. Should a significantlyincreasedpowerconsumptionoccur, preventivemaintenancecanbecarriedout and a breakdownofthemachinethusavoided.

Eventougherwithpowerfluctuations

With a shortpowerfluctuation, thecontrolvoltageissuppliedfromthe drive converter. Thisenergystorecancompensateshort-term voltageinterruptions and reductions. Thedrawframekeepsrunning. Withlongerinterruptions, thedrawframewithactiveautolevelingshutsdown in a controlledmanner. The web remains in thethreadedcondition and allows a rapid restart.

Furtheroptimizeddraftingsystemengineering

Conventionalsliverguides in front ofthedrafting unit are oftenwronglyadjusted. The most frequentfaultisnoncentralguidanceofthesliver. Thenew, patentedsliverguideguaranteescentralguidanceofthesliveratalltimes and thereforeconsistentsliverquality (Fig. 3).The web widthisreproducible and is set by simpleswivellingoftheguideelements. Additionalfiberguides in themaindraftingfieldpreventlateralslippingoftheedgefibers. Fewerdisturbingfaults in theyarn are theresult. Furthermore, the top rollerbearings are permanentlylubricated and run at a lowertemperature.

Patentedsliverguideforconsistent and reproduciblequality

When processing fibers with high fiber-fiber friction, as is the case with man-made fibers, activesliverseparationisnecessaryfor a trouble-free canchange. To achievethis, themotorsoftheautolevelerdraftingsystemcreate a thin place, whichistransportedbelowthecoiler and deliberatelybreaksatcanchange.

CLEANcoil and CLEANcoil-PES coilersforpreciseslivercoiling

CLEANcoilisthe standard coilerforallfibermaterials and thereforeoffersmaximal flexibility. Thespiralcoiling tube ensurescoilingwhichis free ofdraftingfaults, evenathighdeliveryspeeds. A honeycombstructure on thecoilerundersidereliablypreventsdeposits.

For the processing of 100 % polyester, the latest development CLEANcoil-PES (Fig. 4) with a new type of coating offers unique advantages in coiling. Even with critical polyester fibers, the cleaning cycle can be extended by at least 100 %. This also leads to more consistent sliver and yarn quality (Fig.5).

CLEANcoil-PES: the coiler for 100 % Polyester fibers

Precise coiling of Polyester slivers thanks to CLEANcoil-PES coiler

Up to 33 % higher productivity at equal or better yarn quality

The SB-D 50 draw frame without leveling and the RSB-D 50 autoleveler draw frame produce, in practice, at a delivery speed of up to 1 200 m/min. Depending on the fiber material, up to 33 % higher speeds in comparison to the previous model are possible.

The following is an example of a customer who processes combed cotton. The RSB-D 50 is operating at 650 m/min, the previous model RSB-D 45 at 480 m/min. Despite far higher delivery speed, the sliver quality values of the RSB-D 50 achieve an equally good level (Fig. 6). The yarn count Ne 30 shows equal or even slightly better quality. In the nine-week long-term test, the mean values of the disturbing faults on the RSB-D 50 are also remarkable. Compared to the RSB-D 45, that already achieves very good quality values, the Classimat values could be improved by 13 % and the winder cuts by 8 %.

With significantly higher production, the RSB-D 50 achieves very goodsliver and yarn quality

Touch display and LED displays for intuitive operation

The SB-D 50 and RSB-D 50 use the latest control generation as well as a colored touch display with a high resolution. This allows intuitive and easy operator guidance (Fig. 7).

Easy operation: touching the selected fields leads directly to the required menu item

Clear indications are of decisive importance for the operator when it concerns efficient working. Here, LEDs, that are visible from afar and provide information on the condition of the draw frame, help (Fig. 8). They simplify the operator’s work immensely. By means of the USB interface, the data is quickly and easily transferred to other machines. Connection to the Rieter mill control system SPIDERweb is possible as a standard feature.

LEDs visible from afar allow the operators to work efficiently

Technological know-how in the machine display

Frequent personnel changes or shortage of specialists are increasing problems for spinning mills. Rieter offers the remedy with setting recommendations that appear directly on the machine display. The basis is the well-known SLIVERprofessional expert system which is now integrated in the machine display. It provides valuable technological support. This unique tool offers setting recommendations for the entire machine, after the raw material data has been entered. These can be transmitted as a data record onto other machines. In addition, SLIVERprofessional assists with the analysis of spectrogram faults such as periods and draft waves. In this way, faults are rapidly corrected and the availability of the machine is increased.

Assembly on or recessed into the floor

The SB- and RSB-D 50 allow, as previously, assembly on the floor. This makes very flexible positioning possible. A new option is to install the machine recessed into the floor. This means, the transfer height of the can on the empty can magazine is lower and thus more convenient. The full cans are pushed out directly onto the spinning mill floor.

Proven advantages of the RSB-D 45 are retained

The RSB-D 50 keeps unique features of the previous model which are all patented. Here is a selection:

  • Effective suction by automatically lifting clearer lips on the top rollers
  • CLEANtube for sliver coiling without trash accumulations – for cotton applications
  • Sensor for exact first sliver coils, even with can plates that are too low.

With the RSB-D 50 and SB-D 50, Rieter sets another milestone in draw frame engineering for the benefit of our customers. Once more, the saying prevalent amongst mill managers „Buy an RSB and you can sleep peacefully“, applies.

Author:

Jürgen Müller

HeadProduct Group DrawFrames
Machines& Systems
juergen.mueller@rieter.com

 

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