The Effect of a Slub on the Stability of the Ring-spinning Balloon

Fraser, W. B.; Farnell, L.; Stump, D. M.

doi:10.1080/00405009508659039

Cited by 18 publications

(19 citation statements)

References 13 publications

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“…Moreover, spinning tension affects the structure and properties of the spun yarns [1]. Therefore, researchers have tried to predict the yarn tension and the profiles of the balloon in the ring spinning [1][2][3][4][5][6][7][8][9][10][11][12]. From the 1950s onwards, various mathematical models have been presented to model different aspects of the yarn balloon such as configuration and tension.…”

Section: Introductionmentioning

confidence: 99%

“…A great review on the state-of-the art up to the late 1980s was presented by Batra et al [3], followed by a complete review until the late 1990s by Zeng [1]. Clark et al [4], Fraser [5], Fraser et al [6,7], and Fraser and Stump [8] investigated the dynamic theory and the effect of non-uniformity and slob on the stability of the ring spinning balloon. Fan et al [9] studied forces acting on the unwinding of the yarn from the package in hollow spindle spinning.…”

Section: Introductionmentioning

confidence: 99%

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Finite-element and multivariate analyses of tension distribution and spinning parameter effects on a ring-spinning balloon

Mehrabad

Johari

Aghdam

2010

Proceedings of the Institution of Mechanical Engineers, Part C:

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This study aims to investigate the effects of spinning parameters on the balloon tension and configuration. A novel experimental set-up was designed to measure the yarn tension at the pigtail. Experimental results were then used to implement boundary conditions in a multivariate analysis. Also, a finite-element (FE) code was used to predict the yarn balloon profile and stresses induced in the yarn. In particular, Coriolis acceleration and twist effects are considered on the model. It was observed that the equations governing the yarn path and the movement equation of twist in the yarn were completely dependent on each other. FE analysis revealed that while the Coriolis acceleration increases the tension in the yarn, it has little influence on the balloon configuration. Results of this study can be used to obtain optimized production parameters to increase the yarn quality and productivity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite-element and multivariate analyses of tension distribution and spinning parameter effects on a ring-spinning balloon

Mehrabad

Johari

Aghdam

2010

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…2 and 3, respectively. The equation of the traveller motion for the seating with one reaction force has been published, for example, in the works [1], [2], and [6]. This paper focuses on vertical ring with the seating with two reaction forces.…”

Section: Equation Of the Traveller Motionmentioning

confidence: 99%

“…Depending on the character of the seating, determined by the shapes of the ring and the traveller, as a rule, it is a case of seating with one or two reaction forces. The driving force of the traveller is the yarn tension, generated as a result of the balance of forces acting on the traveller during the winding process of the yarn [1], [2]. The ballooning of yarn, which is an accompanying phenomenon of the winding process, exerts a considerable influence on the reaction forces in the ring-traveller system.…”

Section: Introductionmentioning

confidence: 99%

Approach To Analyse Of Reaction Forces In Ring–Traveller System

Beran

Konečna

2017

Autex Research Journal

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The paper presents the approach to analyse of reaction forces and contact pressure for ring-traveller system in twisting machine. The theory of the ballooning yarn has been adapted for the calculation of reactions, and the motion equation is developed for traveller with two reaction forces. The components of normal reaction forces are analyzed for system with free balloon and control one. The effect of the balloon control ring is shown to be significant, reducing the reaction forces of traveller or increasing the speed of spindle. Contact pressure generated between the ring and the traveller is analyzed using Hertzian contact theory. The article also presents the recommendations for optimization of the traveller shape to increase its service life.

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“…In particular, Fraser et al. 25 studied the effect of yarn non-uniformity in the ring spinning process, and quantified that even a slub that in practice would be considered quite small can have a significant effect on the stability of the yarn balloon. Denton 26 investigated the effects of twisting-rate variations in the false twist-texturing process and demonstrated that an oscillating twisting rate can generate an amplitude of twist in the downstream zones greater than the original variation in the texturing zone.…”

mentioning

confidence: 99%

Variation of false twist on spinning process stability and resultant yarn properties in a modified ring spinning frame

Yin

Tao

2017

Textile Research Journal

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Twisting is an important process to form a continuous yarn from short fibers and to determine the structure and properties of the resultant yarn. This article reports on the effect of variation of false twist on process stability and resultant yarn quality in a modified ring spinning frame. Based on twist kinematics, three practical cases that cause twist variations in the spinning process are investigated, namely step function, rectangular function and periodic function changes in false twist. The simulation results are validated by experiments and a good agreement has been demonstrated. The resultant properties of yarn within 30% periodic change in false twist demonstrated insignificance compared with yarn without variation. With the developed model, essential system parameters are numerically examined and their quantitative relationships are studied. The practical implications are discussed.

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The Effect of a Slub on the Stability of the Ring-spinning Balloon

Cited by 18 publications

References 13 publications

Finite-element and multivariate analyses of tension distribution and spinning parameter effects on a ring-spinning balloon

Finite-element and multivariate analyses of tension distribution and spinning parameter effects on a ring-spinning balloon

Approach To Analyse Of Reaction Forces In Ring–Traveller System

Variation of false twist on spinning process stability and resultant yarn properties in a modified ring spinning frame

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