Effect of Easing Device on an Air-Jet Loom of Double Back Rest System

2011 ◽  
Vol 464 ◽  
pp. 717-720
Author(s):  
Si Yong Wang ◽  
Zhi Hua Feng ◽  
Fan Lv
Keyword(s):  
Rest System ◽  
Air Jet ◽  
Warp Tension ◽  
Air Jet Loom ◽  
Back Rest

In order to release the influence of shedding motion on warp tension fluctuation, easing device is often set on short looms with single back rest system. With the decrease of the beam’s diameter, the wrapping angle formed by warp and the active back rest will become bigger, and the effect of the easing device will be more significant. However, the wrapping angle of the double back rest system is a constant while the change of the beam’s diameter. The effect of easing device on air-jet looms of double back rests system is analyzed in this paper, and conclusion has been made that the easing device can be eliminated on the double back rests system.

Nonlinear Dynamic Analysis of Back-Rest System of Type WG-2000 Air-Jet Loom

2010 ◽  
Vol 43 ◽  
pp. 722-725
Author(s):  
Lang Sun ◽  
Zhi Hua Feng ◽  
Si Yong Wang
Keyword(s):  
Dynamic Analysis ◽  
Nonlinear Dynamic ◽  
Nonlinear Dynamic Analysis ◽  
Rest System ◽  
Rotating Speed ◽  
Air Jet ◽  
Weaving Technology ◽  
Set Up ◽  
Air Jet Loom ◽  
Back Rest

The dynamic model of the back-rest system of type WG-2000 air-jet loom is set up and the relevant nonlinear vibration analysis is investigated when principal parametric resonance is taken into consideration. Results show that the system will be unstable when the corresponding frequency of the rotating-speed meets Ω≈2ω0/n, it may have unstable region. The higher speed is, the wider the region is. The nonlinear dynamic analysis of the back-rest system can be benefit for engineering design and improvement of weaving technology.

An investigation of the effects of weave types on surface roughness of woven fabric

2021 ◽  
pp. 004051752110106
Author(s):  
Kura A Beyene ◽  
Degu M Kumelachew
Keyword(s):  
Surface Roughness ◽  
Confidence Interval ◽  
Pairwise Comparison ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Weft Direction ◽  
Air Jet ◽  
Handling Characteristics ◽  
Warp Tension ◽  
Air Jet Loom

The fabrics intended for clothing have more emphasis on their appearance and handling characteristics such as luster, smoothness or roughness, stiffness or limpness, and draping qualities. Nowadays, evaluating fabric touch can be of great interest in the industry to match the quality needs of the consumer and the parameters for the manufacturing process. Throughout this study, the effect of weave types on the surface roughness of cotton woven fabric was investigated and analyzed. Three different weave types namely, plain 1/1, twill 1/3, and sateen 8/3 were investigated. The fabric parameters were 27*20Ne (warp/weft) count of yarn, 38*18 (EPC [Ends per Centimeters]/PPC [Picks per Centimeters]) thread density, and 710 CN/TEX (Cent-newton per Tex) with warp tension was produced by air-jet loom. The findings of this study revealed that the surface roughness values of all the fabrics increased regularly on moving from plain 1/1 weave to sateen 8/3 weave. But, the surface roughness of fabric in the weft direction is higher than in the warp direction. The weave type is statistically significant at a confidence interval of 95% and can effectively be used to describe the surface roughness for both warp and weft direction of woven fabrics. The pairwise comparison reveals that it is statistically significant for weave types in the warp and weft direction of the fabrics. This investigation and analysis of weave types on surface roughness of cotton woven fabrics help textile technologies and manufacturers to consider the weave types during the production of fabrics for different end applications.

Research on the response characteristics of solenoid valve of the air-jet loom by simulation

2013 ◽  
Vol 22 (6) ◽  
pp. 606-612 ◽  
Author(s):  
Yuzhen Jin ◽  
Ruoyu Deng ◽  
Yingzi Jin ◽  
Xudong Hu
Keyword(s):  
Solenoid Valve ◽  
Response Characteristics ◽  
Air Jet ◽  
Air Jet Loom

scholarly journals Air Stream ejected from Sub-nozzles of Air Jet Loom

1996 ◽  
Vol 42 (3-4) ◽  
pp. 80-85 ◽  
Author(s):  
Ryuji Shintani ◽  
Ikuei Donjou ◽  
Kazuhide Chikaoka ◽  
Atsushi Okajima
Keyword(s):  
Air Jet ◽  
Air Stream ◽  
Air Jet Loom

scholarly journals An Investigation of Air Consumption of Air-Jet Loom

2021 ◽  
Vol 11 (1) ◽  
pp. 1-14
Author(s):  
Mohammad Mobarak Hossain ◽  
Habiba Alaya Suchona ◽  
Mst Tanzina Nasrin ◽  
Imran Hossain
Keyword(s):  
Air Jet ◽  
Air Jet Loom

Investigation into the Fabric Handle which Weaved on Air-Jet Loom by Bundle Yarn Filling Insertion Technology

2013 ◽  
Vol 821-822 ◽  
pp. 360-364
Author(s):  
Yi Weng ◽  
Hong Jun Cui
Keyword(s):  
Bending Properties ◽  
Air Jet ◽  
Fabric Handle ◽  
Air Jet Loom

Aimed to investigate the fabric handle which weaved with bundle yarn filling insertion technology, the properties of interlace resistance, flatness, friction, bending and compressing are tested. And 2 fabrics with the same size which weaved by different weaving methods on air-jet loom are analyzed contrastively. The result shows that the double wefts satin fabric which weaved with bundle yarn filling insertion technology had the adjacent interweave resistance, touched more flat and stiff compared to which weaved by traditional weaving technique. It was smoother and had better bending properties at warp orientation. But along weft orientation, it was rougher and had less bending properties.

Analysis of the characteristics of air–yarn coupling movement in the profiled reed groove of an air-jet loom

2021 ◽  
pp. 004051752110569
Author(s):  
Yuzhen Jin ◽  
Hailang Xiong ◽  
Jingyu Cui
Keyword(s):  
Numerical Results ◽  
Weft Yarn ◽  
Valuable Insight ◽  
Arbitrary Lagrangian Eulerian ◽  
Air Jet ◽  
Gap Ratio ◽  
Gas Consumption ◽  
Simulation Results ◽  
Gas Leaks ◽  
Air Jet Loom

The movement characteristics of yarn in the profiled reed groove of an air-jet loom can have a great impact on the performance of the fabric. Unstable yarn movement tends to lead to weft defects, as short wefts or weft breaks may occur, which could deteriorate the quality of the final fabric. In this paper, the characteristics of the yarn movement in a profiled reed groove are numerically studied. The arbitrary Lagrangian–Eulerian method is used to solve the two-way airflow–yarn interaction and the yarn is simulated with the ball–socket model. A fluctuation ratio is defined to characterize the unsteadiness of the yarn movement. Our simulation first investigates the effect of the gap ratio of the profiled reed groove (β) on the yarn movement then compares the movements of different yarn kinds. The simulation results indicate that a larger β not only decreases gas leaks (thus saves gas consumption), but also stabilizes the yarn movement. Our simulation results also show that the movement of the yarn of polypropylene is more stable than the other two weft-yarn materials. An experiment is also conducted to validate our numerical results, which shows a favorable agreement between them. Our numerical results of the yarn movement in the profiled reed groove can provide a valuable insight into the optimization of the weft insertion system of the air-jet loom.

Optimization of fluid characteristics in the main nozzle of an air-jet loom

2021 ◽  
pp. 004051752110395
Author(s):  
Xinlei Huang ◽  
Lee Michael Clemon ◽  
Mohammad Saidul Islam ◽  
Suvash C. Saha
Keyword(s):  
Fluid Dynamic ◽  
Three Dimensional ◽  
Sudden Expansion ◽  
Dynamic Features ◽  
Original Design ◽  
Flow Models ◽  
Air Jet ◽  
Acceleration Tube ◽  
Air Jet Loom ◽  
Fluid Characteristics

As part of the propulsion system, the fluid dynamic features of the main nozzle can immediately affect the stability and efficiency of an air-jet loom. This study aims to optimize the fluid characteristics in the main nozzle of an air-jet loom. To investigate ways of weakening the effect of airflow congestion and backflow phenomenon occurring in the sudden expansion region, the computational fluid dynamics method is employed. Three-dimensional turbulence flow models for a regular main nozzle and 12 prototypes with different nozzle core tip geometry are built, simulated, and analyzed to get the optimum performance. Furthermore, a set of modified equations that consider the direction of airflow are proposed for better estimation of the friction force applied by the nozzle. The result shows that the nozzle core tip's geometry has a significant influence on the internal airflow, affecting the acceleration tube airflow velocity, turbulence intensity, and backflow strength of the sudden expansion region, and other critical fluid characteristics as well. Several proposed models have succeeded in reducing the backflow and outperforming the original design in many different aspects. Models A-60 and C-P, in particular, manage to increase the propulsion force by 37.6% and 20.2% in the acceleration tube while reducing the maximum backflow by 57.1% and 52.2%, respectively. These simulation results can provide invaluable information for the future optimization of the main nozzle.

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