Effect of vortex tube structure on yarn quality in vortex spinning machine

Li, Meiling; Yu, Chongwen; Shang, Shanshan

doi:10.1007/s12221-014-1786-3

Cited by 11 publications

(14 citation statements)

References 5 publications

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“…The guiding body guides the fibers through the spiral channel into the twisting chamber; the vortex tube is a major twisting part with five jet orifices tangentially distributed on its periphery; the cone body is a supporting part for open-end fibers; and the doffing tube with five jet orifices plays the role of yarn drawing-in. 21 A cross-section drawn of the nozzle is showed in Figure 2, where the blue shading is the airflow area. The computational model is depicted in Figure 3, where the Z-axis is the yarn outlet axial direction, the X-axis is the radial direction, and the Y-axis is the tangential direction.…”

Section: Computational Modelmentioning

confidence: 99%

Numerical simulation of the airflow field in vortex spinning processing

Shang

Yang

2018

Textile Research Journal

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Three-dimensional numerical simulation of the airflow characteristics during the whole vortex spinning process, including the initial state of the yarn drawing-in process and the normal stable process, were obtained and analyzed. Spinning experiments, with the aid of a scanning electron microscope, were adopted to verify the results of the numerical simulation. The numerical simulation results show that the turbulence phenomenon in the normal spinning process is much more obvious than that in the initial spinning process; the air streamlines move orderly in the initial spinning process, which will produce a strong suction force that will be conducive to drawing the fiber bundle into the nozzle successfully, but the trajectory of airflow is complex in the normal stable spinning process and there is an upstream airflow with the same direction as the rotating airflow to provide extra tension for the yarn, which can improve the strength of the resultant yarn. The spinning experimental result is consistent with the result predicted by numerical simulation. The research further reveals the flow regularity and the turbulent phenomenon of the high-speed rotating airflow, predicts the effect of airflow motion on the spinning effect, and is helpful for stabilizing the spinning process and improving the yarn tenacity.

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Section: Computational Modelmentioning

confidence: 99%

Numerical simulation of the airflow field in vortex spinning processing

Shang

Yang

2018

Textile Research Journal

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“…The path followed by the fibre in the currents created by the air jets play a crucial role in yarn quality. Most structural defects are caused by the deflection of fibres in the air jet from their ideal path [4][5][6][7][8][9].…”

Section: Vortex Spinningmentioning

confidence: 99%

“…Murata Vortex spinning technology is a modified form of jet spinning which has attracted a lot of attention because of its advantages over ring-spinning, open end and air-jet spinning. It has a high productivity rate, its yarn structure is similar to ring yarn, low hairiness and most important; it is possible to use a wider fibre length range to spin a wider yarn size production rage for 100% cotton [5][6][7][8][9][10]. Above-mentioned facts about the ring-spun yarn and especially air-jet and vortex yarn were the basic reason to deal with the influence of air-jet and vortex yarn structure on woven fabric functionality in comparison with conventional ring-spun yarn in the weft direction.…”

Section: Introductionmentioning

confidence: 99%

The influence of air-jet and vortex yarn on functionality of woven fabric

Gorjanc

Glažar

2018

Industria Textila

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The basic intention of the research is to analyse the influence of air-jet and vortex yarn structure on woven fabric functionality. With the research, the air-jet and vortex yarn from the mixture of 65 % PES / 35 % CO fibres and fineness 20 tex were analysed. For comparison, the conventional ring-spun yarn was chosen from the mixture of 65 % PES/35 % CO fibres and fineness 20 tex. The woven fabric in the twill weave T1/3Z was produced from the air-jet, vortex and ring-spun yarn in the weft direction with two different weft densities (20 and 30 yarns per cm). In the first part of the study, the structure, physical and mechanical properties of the air-jet, vortex and ring-spun yarn were analysed, while in the second part of the research, the influence of used yarn in the weft direction on the functionality of woven fabric was studied. The research was focused mainly on physical, mechanical properties as well as permeability properties of woven fabric with air-jet and vortex yarn in the weft direction in comparison with woven fabric with conventional ring-spun yarn in the weft direction, with equal chemical composition and fineness of yarn. The research results was shown which yarn structure in the weft direction of woven fabric (air-jet or vortex) the most closely approximates the characteristics of the ring-spun yarn, which has because of ring-traveller-spindle mechanism ideal and the most even structure, mainly because of the insertion of the true twist.

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“…The airflow during rotor spinning process obey mass conservation and momentum conservation in view of fluid mechanics [9][10][11][12].…”

Section: Models and Experimentsmentioning

confidence: 99%