Investigation into novel drafting systems on ring spinning frame for improving yarn properties

Quan, Jing; He, Qianshan; Cheng, Longdi; Yu, Jianyong; Xue, Wenliang

doi:10.1177/00405175211073824

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Ring Frame is the most basic machine to produce carded yarn manufacturing. This equipment is called Ring Spinning Machine [20][21]. The primary function of this machine is to produce yarn from previously made roving or simplex through various processes such as creeling, drafting, twisting, building, and winding.…”

Section: Ring Spinning Framementioning

confidence: 99%

Prioritizing the quality parameters of cotton carded knit yarn by varying tensions of the bottom aprons of the ring frame

Raian¹,

Akter²,

Baral³

2023

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The forces exerted on fibres during drafting in the drafting zone with the upper and bottom aprons of the Ring Frame significantly impact the yarn quality. Aprons are crucial in manipulating fibres by facilitating movement and directing them toward the primary drafting area. From these two aprons, the bottom apron's tension is changed by changing tension spring bar groove hole positions. There is no scope for changing such settings in the case of top aprons. This research aims to achieve high-quality cotton carded knit yarn by selecting an appropriate bottom apron tension due to the significant role in proper drafting and twist insertion at the time of the manufacturing process directly affecting produced yarn's strength, evenness, imperfections, and hairiness properties. To fulfil this requirement, six yarn samples are produced each time by using 5 different tensions of the bottom drafting aprons. The samples underwent quality parameter testing, including Unevenness (U)%, Coefficient of Variation (CV)%, Imperfection Index (IPI), Hairiness (H), and Count Strength Product (CSP). The findings indicated that increasing the tension of the bottom apron while maintaining positions 1, 2, and 3 reduces the occurrence of neps, variations in thickness and thinness, and imperfections. In contrast, CSP is increased due to elevated stress on the fibres. In general, maintaining an appropriate tension enhanced the quality of the yarn, and the best quality was obtained for position 3, considering all the quality variables. Moreover, by using Interpretive Structural Modelling (ISM) methodology, the pairwise relationship between the quality variables is shown. Finally, after calculation, those quality variables are arranged in three levels. According to this level, the quality parameters are ranked where the top is the highest. It is observed that Count Strength Product is at the highest level, which indicates that CSP should be given more priority. Moreover, the end use of this yarn is to produce knit items, and for the knitting yarn, CSP is one of the most influential quality variables.

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Section: Ring Spinning Framementioning

confidence: 99%

Prioritizing the quality parameters of cotton carded knit yarn by varying tensions of the bottom aprons of the ring frame

Raian¹,

Akter²,

Baral³

2023

Text Leather Rev

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“…Yarn evenness refers to the uniformity of yarn thickness or weight in short sections along the axial direction [29,30]. Evenness is an important index of yarn quality, which not only affects the single-yarn strength and the variation factor of the strength, but also affects the weaving breakage rate and fabric flatness [31,32]. From Figures 10 and 11, it can be seen that in terms of the evenness of the yarns, the general direction is the same for both the two strands of staple fibers and the composite of filaments and staple fiber strands (p < 0.05, Appendix C).…”

Section: Comparison Of Evenness Of Yarns Spun By Different Step Rollsmentioning

confidence: 99%

Controlling the Fiber Stress Distribution with Variable-Frequency Step Roll for Tunable Spun Yarn Structures

Peng

Chen

et al. 2023

Polymers

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The dynamic regulation of fiber stress distribution in the yarn-forming triangle area is critical for controlling variable composite yarn structures, including siro and sirofil composite yarns. In this study, comparison analyses of the variable geometric structure and stress distribution during the yarn-forming process, which involves step rolls with asymmetrical fiber control, have been carried out using ring-spinning technology. The geometric analyses show that partly staple fibers are continuously controlled while other fibers intermittently lack stress restraint, resulting in cyclically changed helical angles and wrapping density in the yarn-forming triangle area. The yarn structure model displayed that periodically distributed staple fibers occur in siro composite yarn, while sirofil composite yarn shows gradual periodic changes with uniform thickness variations, caused by cyclical changes in the stress distribution between filaments, and the strand altered the yarn-forming zone shapes from symmetrical to offset. Then, a systematic comparison of variable composite yarns with different frequencies (high, medium and low frequency) revealed that low-frequency step roll with wider grooves resulted in an intermittent output of staple fibers with less stress restraint, resulting in more pronounced structural variation in the siro and sirofil composite yarns with a slight yarn quality deterioration.

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“…This zone uses pairs of top and bottom rollers running at varying speeds to attenuate the roving fibre strand into a thinner, more uniform structure [5]. The spacer is one of the critical components of the drafting zone [7][8][9]. It is a plastic material between the top and bottom apron of the drafting zone of the Ring Frame.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Impact of Spacer Size Variations on the Ring-Spun Yarn Quality Ranking

Raian,

Saha,

Hossen

et al. 2023

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Spinning represents the foundational step in textile manufacturing, with yarn quality significantly influencing subsequent processes. Consequently, enhancing yarn quality remains a primary concern for spinners. Of various spinning techniques, ring spinning stands out for its blend of productivity and quality. The final ring yarn is produced by the ring frame, a machine encompassing multiple functional zones. A pivotal component within this frame is the spacer between the top and bottom aprons in the drafting zone. It modulates drafting pressure and fibre movement, directly affecting yarn quality. This research explored the impact of spacer size on yarn quality by employing seven distinct spacer sizes to produce 20 Ne cotton combed yarn. Results indicated that smaller spacer sizes often yielded inferior yarn quality. As the size increased, quality improved; however, after reaching an optimal size, further enlargement led to a decline in five key quality metrics: CVm (%), IPI, Hairiness, Tenacity, and Elongation %. This fluctuation can be attributed to changes in fibre movement and drafting pressure in the drafting zone. The study employed Interpretive Structural Modelling (ISM), a methodology grounded in expert opinions, to rank these quality parameters in importance. Through ISM calculations, yarn tenacity emerged as the most crucial quality parameter, aligning with its significance in producing woven fabrics. Furthermore, a Cronbach's Alpha score of 0.66 underscores the robust internal consistency and interrelation attesting to the study's reliability.

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Investigation into novel drafting systems on ring spinning frame for improving yarn properties

Cited by 5 publications

References 24 publications

Prioritizing the quality parameters of cotton carded knit yarn by varying tensions of the bottom aprons of the ring frame

Prioritizing the quality parameters of cotton carded knit yarn by varying tensions of the bottom aprons of the ring frame

Controlling the Fiber Stress Distribution with Variable-Frequency Step Roll for Tunable Spun Yarn Structures

Assessing the Impact of Spacer Size Variations on the Ring-Spun Yarn Quality Ranking

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