Dual-feed rotor spinning of cotton fiber: trash separation and yarn properties

Peyravi, Ali; Eskandarnejad, Safdar; Moghadam, M. Bameni

doi:10.1080/00405000.2013.813663

Cited by 15 publications

(15 citation statements)

References 3 publications

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“…[11] Even pressure distribution achieved through additional transfer channel will affect the fiber processing mechanics. This observation agrees with Peyravi et al [13] Findings when they improvised a dual-feed unit to study the yarn characteristics.…”

Section: Evaluation Of the Airflow Regimesupporting

confidence: 93%

“…Study on the behavior of drag and lift forces in the flows is a significant phenomenon that gives a comprehensive understanding of a given processes, which can help to improve the quality and handle costs efficiently. [3][4][5] Numerical studies in textile processing have tremendously risen in the past decade with authors focusing on finite element methods to study fiber processing techniques more comprehensively [6][7][8][9][10][11][12][13]. In all industrial rotor spinning machines, the opening of the fibers is performed by the opening roller, in which sliver is fed from a single point.…”

Section: Introductionmentioning

confidence: 99%

“…Increasing the number of feed rollers from one to two may improve fiber opening and trash ejection by two-step loading in the opening zone of the roller. Peyravi et al [13] and Wang et al [14] reported the dual-feed concepts that could spin yarns with better yarn properties. Their remarkable findings have significantly contributed to rotor spinning research with critical insights towards design modification, yarn quality improvement and reduction in production costs.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of drag and lift in the internal flow field of a dual rotor spinning unit via CFD

2017

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In the present study, we evaluate the drag and lift magnitude in the new dual-feed rotor spinning unit using computational fluid dynamics technique. We adopt theoretical and numerical approach based on FLUENT to investigate the influence of new design on the drag and lift in the rotor interior. Results reveal that the drag and lift inside the rotor of the proposed model are reduced by 60-80% and 50-66% respectively as compared to the conventional unit. The velocity and pressure profiles become evenly distributed in the dualfeed rotor interior as opposed to the conventional rotor spinning unit and this modification is anticipated to improve fiber configurations. This phenomenon can be utilized to further optimize the rotor spinning unit and other wall-bounded engineering problems.

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Section: Evaluation Of the Airflow Regimesupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of drag and lift in the internal flow field of a dual rotor spinning unit via CFD

2017

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“…Recent developments in rotor spinning have concentrated on improving yarn quality and productivity through design modifications of machine components. For example, modification in the feeding unit by using two feeding rollers rather than one was done with an objective to improve fibre opening by gradual loading of the opening roller and to improve the fibre orientation and properties of the final rotor yarn [116,117]. Since its commercial introduction in ITMA-1967, the rotor speed in rotor spinning has been increased from 30,000 rpm to 200,000 rpm and manufacturers have produced longer automated machines.…”

Section: 22mentioning

confidence: 99%

Cotton in the new millennium: advances, economics, perceptions and problems

et al. 2018

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Cotton is the most significant natural fibre and has been a preferred choice of the textile industry and consumers since the industrial revolution began. The share of man-made fibres, both regenerated and synthetic fibres, has grown considerably in recent times but cotton production has also been on the rise and accounts for about half of the fibres used for apparel and textile goods. To cotton's advantage, the premium attached to the presence of cotton fibre and the general positive consumer perception is well established, however, compared to commodity manmade fibres and high performance fibres, cotton has limitations in terms of its mechanical properties but can help to overcome moisture management issues that arise with performance apparel during active wear. This issue of Textile Progress aims to: i. Report on advances in cotton cultivation and processing as well as improvements to conventional cotton cultivation and ginning. The processing of cotton in the textile industry from fibre to finished fabric, cotton and its blends, and their applications in technical textiles are also covered. ii. Explore the economic impact of cotton in different parts of the world including an overview of global cotton trade. iii. Examine the environmental perception of cotton fibre and efforts in organic and genetically-modified (GM) cotton production. The topic of naturally-coloured cotton, post-consumer waste is covered and the environmental impacts of cotton cultivation and processing are discussed. Hazardous effects of cultivation, such as the extensive use of pesticides, insecticides and irrigation with fresh water, and consequences of the use of GM cotton and cotton fibres in general on the climate are summarised and the effects of cotton processing on workers are addressed. The potential hazards during cotton cultivation, processing and use are also included. iv. Examine how the properties of cotton textiles can be enhanced, for example, by improving wrinkle recovery and reducing the flammability of cotton fibre.

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“…To obtain better yarn properties, research on the design of the rotor spinning unit has been conducted experimentally over the past few decades [6][7][8][9]. Lawrence and Chen [9,10] investigated fiber removal from the opening roller and fiber trajectories in the transfer channel using high-speed cinematography.…”

Section: Introductionmentioning

confidence: 99%

Rotor spinning transfer channel design optimization via computational fluid dynamics

Lin

Bergadà

Zeng

et al. 2017

Textile Research Journal

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The conventional rotor spinning unit generates flow vortices in the transfer channel upstream region which affect the fiber configuration and consequently yarn properties. Geometry and spinning parameters such as transfer channel length, inlet width, rotor outlet pressure, opening roller speed and diameter were found to be key parameters influencing airflow characteristics. To reduce the flow vortices in the upper stream region, modifications of the transfer channel were proposed, and their airflow fields were analyzed using Computational Fluid Dynamics (CFD). Three designs were studied; round transfer channel inlet, a bypass channel for extra air supply and one with both the bypass and the round inlet. Analysis of airflow revealed that the design with both round transfer channel inlet and a bypass proved to be very effective in properly directing the flow and minimizing vortices. The design was also characterized by smoother velocity streamlines and maximum mass flow across the transfer channel. A conventional rotor spinning unit was modified in which a round transfer channel inlet corner and a bypass channel were utilized to conduct the experimental tests. Three sets of yarn samples were produced using the conventional and modified rotor spinning units under different rotor speed conditions. Yarn properties were tested. Properties such as tenacity, CVm%, thin and thick places of the spun yarns produced by the new design improved compared to that of the conventional yarn.

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Dual-feed rotor spinning of cotton fiber: trash separation and yarn properties

Cited by 15 publications

References 3 publications

Evaluation of drag and lift in the internal flow field of a dual rotor spinning unit via CFD

Evaluation of drag and lift in the internal flow field of a dual rotor spinning unit via CFD

Cotton in the new millennium: advances, economics, perceptions and problems

Rotor spinning transfer channel design optimization via computational fluid dynamics

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