Unstructured tetrahedral grids which are suitable for airflow with wall effects and complicated boundary layers were adopted to divided grids in the computational area.
Mass irregularity and imperfections of yarn is mainly affected by the main draft of drafting unit. Rotor yarns are less irregular compared to the ring spun yarn because of multiple doubling or back doubling of fibres in the rotor groove.
To study the effect of feed stock, we have conducted a study to compare the yarn characteristics using both drawn sliver and card sliver as the feed material. However, the card sliver, due to its loose structure, is easier to twist.
Materials and Methods 2. Indian Journal of Fibre and Textile Research, 17, We are developing the fundamental knowledge base that can lead to more efficient machines, shorter production lines, and novel processes.
The vortex air spinning unit is composed of a Murata MJS, twin air jet spinning nozzle, and utilizes Influence of spinning parameters on vortex service air system. Some of the test results have been used to build a two-phase flow model in CFD. Staple yarn manufacturing involves four essential operations: It has been also found that at rotor diameter variation, the thick places were increased Thus as the number of fibers in the yarn increases, the percentage of wrapper fibers decreases and the tenacity goes down.
Effect of rotor diameter on yarn neps at rotor speed of 35, rpm. We have demonstrated its feasibility in producing coarse yarns. ABSTRACT Defect free yarn is a great demand for spinner, knitter, and weaver and also other textile personnel because numerous end products from knit apparels to woven fabrics, from towels to sheets and from carpets to industrial fabrics characteristics significantly depend on the physical properties of yarn.
Tested rotor spun yarns had a larger diameter, higher hairiness, lower tenacity and higher elongation, lower mass irregularity and number of imperfections, higher abrasion resistance and lower bending rigidity compared to tested Vortex spun yarns.
Further work could be done on producing quality yarn of various counts from other natural, synthetic and blends fibres to justify this analysis. A negative air pressure is formed in the first nozzle to aspirate the fiber sliver.
It is expected that uniformity of polyester staple fibers will produce a reasonably uniform web. By incorporating multiple spinning heads on the carding machine itself, the novel Card-Spinning machine will replace the traditional card, two draw frames and the yarn-spinning machine.
Therefore, a pair of normal feeding rollers are used to control the rate of feeding the web ribbon into the spinning nozzle. Vortex Yarn guide book, Retrieved 08 24,Web site: The function of the back nozzle is to enhance the cohesion of the strand thus giving greater yarn strength.
Conclusions Rotor-spun yarns have established firmly in fields of application for woven and knitted fabrics. Journal of Textile Science and Technology, 2, Effect of rotor diameter on yarn thin places at rotor speed of 35, rpm.
Thus two issues, namely higher number of wrapper fibers and longer extent of wrapper fibers needed attention. Cite this paper Repon, M. At constant rotor diameter of 43 mm, the yarn qualities were improved i. Look at the figure which demonstrates the Murata principle of producing fasciated yarns with two nozzles N1 and N2.
Various types of yarns were produced based on different variables. Realizable k-epsilon model was used to simulate the turbulence of airflow in the nozzle. Rotor-spun yarns could be utilized effectively where the particular properties of the rotor-spun yarns corresponded particularly closely to the requirements of the end products.
The fibres moved forward to the rotor groove from the conical rotor wall by centrifugal forces in the rapidly rotating rotor. This is important for monitoring the input quality of the web to the yarn-spinning head.
Also worth mentioning as end products using rotor spun yarns are socks and sweaters in the clothing sector, sheets and upholstery fabrics in the home textile sector, as well as technical textiles. Considering such factors the present research work was initiated to study the effect of rotor speed and rotor diameter upon the yarn quality.
It also could be checked by changing others spinning parameters. Rotor speed changed from 35, to 45, rpm at constant rotor diameter of 43 mm and rotor diameter raised from 43 mm to 66 mm at constant rotor speed of 35, rpm. Effect of rotor diameter on yarn thick places at rotor speed of 35, rpm.
Effect of rotor diameter on yarn thick places at rotor speed of 35, rpm. In addition, rotor spun yarns are not as affected by roller drafting wave as ring yarns .
Forty pressure sensors arranged in four rows are installed to monitor the flow pattern.The influence of vortex spinning parameters on the hairiness properties of polyester/cotton vortex yarn has been studied. Polyester/cotton yarn of blend ratio has been produced in two different counts (Ne 20s and Ne 40s) each with four different spinning parameters (delivery speed, spindle size, feed ratio and nozzle pressure).
INFLUENCE OF SPINNING PARAMETERS ON VORTEX SPUN YARN PROPERTIES Vortex spinning can be viewed as a refinement of jet spinning, or a natural development in fasciated yarn technology.
An entirely new technology “to spin yarn with the vortex flow of compressed air” created VORTEX; a quite new type of yarn 9 / African. Request PDF on ResearchGate | Vortex spinning technology | The latest development in air jet spinning technology is the Murata Vortex Spinner (MVS), which was firstly introduced at Osaka International Textile Machinery Show OTEMAS '97 by Murata Machinery Ltd.
targeting the regular wear and casual fashion markets. Numerical computation of a flow field affected by the process parameters of Murata vortex spinning. Fibres Text East Eur ; 35 – Google Scholar: Li, ML, Yu, CW.
A numerical and experimental study on the effect of the orifice angle of vortex tube in vortex spinning machine. J Text Inst ; – Google Scholar, Crossref: Gizem Karakan Günaydin and Ali Serkan Soydan (March 1st ). Vortex Spinning System and Vortex Yarn Structure, Vortex Structures in Fluid Dynamic Problems Hector Perez-de-Tejada, IntechOpen, DOI: / Available from: Gizem Karakan Günaydin and Ali Serkan Soydan (March 1st ).
Vortex. Defect free yarn is a great demand for spinner, knitter, and weaver and also other textile personnel because numerous end products from knit apparels to woven fabrics, from towels to sheets and from carpets to industrial fabrics characteristics significantly depend on the physical properties of yarn.
The qualities of rotor yarn are really directed by spinning parameters.Download