Comparison of the airflow characteristics and yarn properties between conventional and dual-feed-opening rotor spinning units

Abstract

In order to explore the differences between conventional and dual-feed-opening rotor spinning units (RSUs), this work compares the airflow characteristics of two RSU models utilizing a computational fluid dynamics simulation model with the accuracy verified by airflow behavior observation and air pressure measurement. The effect of two different opening roller speeds on the airflow field distribution of a dual-feed-opening model is also investigated. In addition, the yarn properties of six pure and blended yarns corresponding to the two RSU models are evaluated. The results reveal that the distributions of airflow velocity vector and air pressure in the two RSU models show a strong similarity under the same boundary conditions. However, the dual-feed-opening model possesses a centrosymmetric and more balanced airflow field distribution compared to the conventional model. In addition, the dual-feed-opening yarns show a superior performance in comparison to the conventional yarns. Furthermore, for the dual-feed-opening model, there are equivalent contributions of two separated opening and fiber transmission systems to the airflow field distribution and yarn formation. Compared to the configuration with the same two opening roller speeds, the dual-feed-opening model configured with two different opening roller speeds obtains an improved blended yarn performance with having few effects on the airflow characteristics. This strength of the dual-feed-opening RSU could facilitate the production of blended and fancy yarns employing the fibers with diverse properties. This study could provide some guidelines for the manufacture of rotor-spun yarns and the future design of RSUs.

Keywords

Dual-feed-opening rotor spinning unit airflow field computational fluid dynamics simulation rotor-spun yarn

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References

Gooch

JW.

Rotor spinning. In: Gooch JW (ed.) Encyclopedic dictionary of polymers. New York: Springer New York, 2011, pp.639–639.

Kwasniak

An investigation of a new method to produce fancy yarns by rotor spinning. J Text Inst Proc Abstr 1996; 87: 321–334.

Cheng

Murray

Effects of spinning conditions on structure and properties of open-end cover-spun yarns. Text Res J 2000; 70: 690–695.

Matsumoto

Fushimi

Saito

, et al . Twisting mechanisms of open-end rotor spun hybrid yarns. Text Res J 2002; 72: 735–740.

Huh Y, Kim YR and Oxenham W. Analyzing structural and physical properties of ring, rotor, and friction spun yarns. Text Res J 2002; 72: 156–163.

Nield

Ali

ARA.

Open-end-spun core-spun yarns. J Text Inst 1977; 68: 223–229.

Pouresfandiari

Fushimi

Sakaguchi

, et al. Spinning conditions and characteristics of open-end rotor spun hybrid yarns. Text Res J 2002; 72: 61.

Matsumoto

Y-I

Saito

Sakaouchi

, et al. Combination effects of open-end rotor spun hybrid yarns. Text Res J 2004; 74: 671–676.

Yang

R-H

Wang

S-Y.

Determination of the convergent point in the rotor-spun composite yarn spinning process. Text Res J 2009; 79: 555–557.

10.

Yang

R-H

Wang

S-Y.

A mathematical model for rotor-spun composite yarn spinning process. Text Res J 2010; 80: 487–490.

11.

Hajilari

Eskandarnejad

Behzadan

, et al. Effect of two separate fibre feed systems in rotor spinning on yarn properties. Fiber Polym 2007; 8: 543–549.

12.

Peyravi

Eskandarnejad

Moghadam

MB.

Dual-feed rotor spinning of cotton fiber: trash separation and yarn properties. J Text Inst Proc Abstr 2014; 105: 377–382.

13.

Xue

Gao

Yang

, et al. Rotor spinning method and apparatus using three-cotton-sliver asynchronous input and multi-stage carding. Patent CN105063821B, China, 2015.

14.

Yang

R-H

Xue

Gao

W-D.

Structure and performance of color blended rotor spun yarn produced by a novel frame with asynchronous feed rollers. Text Res J 2019; 89: 411–421.

15.

Wang

Yan

, et al. Dual feed carding device. Patent CN103911696A, China, 2014.

16.

Kong

Platfoot

RA.

Two-dimensional simulation of air flow in the transfer channel of open-end rotor spinning machines. Text Res J 1996; 66: 641–650.

17.

Yang

Pan

, et al. Effect of position of the fiber transport channel on fiber motion in the high-speed rotor. Text Res J. Epub ahead of print March 17, 2021. DOI: 00405175211001804.

18.

Yang

Chen

, et al. Numerical simulation of 3D flow in rotation cup of rotor spinning. Appl Mech Mater 2011; 80-81: 1145–1149.

19.

Yang

Liu

Xue

, et al. Numerical analysis and comparison of airflow in rotors with U and V groove during rotor spinning process. J Eng Fiber Fabric 2016; 11: 29–35.

20.

Xiao

Dou

H-S

Critical rotating speed of rotor cup in an air suction open-end spinning machine. Text Res J 2017; 87: 1593–1603.

21.

Lin

Zeng

Wang

Computational simulation of air flow in the rotor spinning unit. Text Res J 2016; 86: 115–126.

22.

Akankwasa

Lin

Zhang

, et al. Numerical simulation of three-dimensional airflow in a novel dual-feed rotor spinning box. Text Res J 2018; 88: 237–253.

23.

Akankwasa

Lin

Wang

Evaluation of the dual-feed rotor spinning unit based on airflow dynamics and blended yarn properties. J Text Inst 2017; 108: 1985–1996.

24.

Shi

Akankwasa

Zhang

, et al. Characterization of the airflow field in the rotor spinning unit based on a novel experimental approach and numerical simulation. Text Res J. 2021; 91(7–8): 717–728.

25.

Speight

JG.

Bernoulli's principle. John Wiley & Sons, Inc., Hoboken, USA, 2017.