Simulation on Roller Drafting Based on Hook Fiber Arrangement in the Sliver

Sun, Na; Yu, Chongwen

doi:10.1007/s12221-021-0496-x

Cited by 2 publications

(3 citation statements)

References 24 publications

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“…To simplify, the proportion of fastmoving and slow-moving fibers in floating fibers it is assumed to be equivalent to the proportion of the number of front and back roller fibers. Fast-floating and slow-floating fibers can be expressed as 15,19…”

Section: Verification Of Simplified Curvesmentioning

confidence: 99%

“…To simplify, the proportion of fast-moving and slow-moving fibers in floating fibers it is assumed to be equivalent to the proportion of the number of front and back roller fibers. Fast-floating and slow-floating fibers can be expressed as 15 ,19 where F f ( x ) is the number of fast-floating fibers and F s ( x ) is the number of slow-floating fibers. Their distributions are shown in Figure 7.…”

Section: Simplification Of the Fiber Distributionmentioning

confidence: 99%

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Isometric fiber distribution in the roller drafting zone

Qian,

Zhou,

2024

Textile Research Journal

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Roller drafting, a key mechanical operation for attenuating slivers to a desired thickness, holds critical significance in the spinning processes of the textile industry. Within the drafting stage of spinning, the motion state of fibers is influenced by their intrinsic characteristics, the force applied, and the distribution of both fast-moving and slow-moving fibers. This research focused on man-made fibers, which are isometric, and studied their distributions in the roller drafting zone. In addition, the cut-off weighting method was incorporated to measure the fiber distributions in the drafting zone, the impact of drafting parameters on fiber distribution was discussed, and the associated fiber distribution curves were generated. Findings reveal that fiber distributions are highly affected by factors such as the fiber length, roller-setting, and draft ratio. Conversely, the input sliver linear density and doubling number exhibited negligible influence on the fiber distribution. The total fiber distribution curve appeared as a dichotomy, including a horizontal line and an oblique line. This study also presented a second-order regression model and a deduction model to predict the distribution of isometric fibers in the roller drafting zone.

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Section: Verification Of Simplified Curvesmentioning

confidence: 99%

Section: Simplification Of the Fiber Distributionmentioning

confidence: 99%

Isometric fiber distribution in the roller drafting zone

Qian,

Zhou,

2024

Textile Research Journal

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“…4,[23][24][25][26] Furthermore, the simulation of the roller drafting process has been carried out based on the model of fiber arrangement in the sliver. 2,3,[27][28][29] Nevertheless, in these models, the fiber in the input sliver before the drafting simulation was regarded to be randomly arranged and the additional irregularity caused by the fore-spinning process was not considered. In the carding sliver, the sliver irregularity calculated from the idealized random fiber arrangement is regarded as the theoretical irregularity, which is far lower than the actual sliver irregularity.…”

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confidence: 99%

Study of sliver irregularity caused by fiber acceleration motion during the drafting process

Liu,

Zhu,

Zhong

et al. 2023

Textile Research Journal

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During the drafting process, the fiber acceleration motion contributes significantly to the sliver irregularity. In this study, the drafting simulation based on the improved model of fiber arrangement in the sliver was developed to analyze the sliver irregularity caused by the acceleration motion during the drafting process. The results indicated that the drafting simulation could provide an effective reference for the parameter optimization of the drafting process under the condition of saving raw material cost and time cost. The simulations and calculations denoted that a shorter gauge length and larger input sliver linear density by more concentrated accelerated motion could be conducive to more even slivers during the drafting process. In addition, in order to generate higher sliver evenness, in the double-zone drafting process, the draft ratio of the back drafting zone should be selected to be slightly greater than 1 so that the draft ratio of the front drafting zone would be relatively large when the total draft ratio is constant due to the trend of the additional irregularity caused by the acceleration motion increasing to a peak value firstly and then decreasing as the draft ratio grows.

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Simulation on Roller Drafting Based on Hook Fiber Arrangement in the Sliver

Cited by 2 publications

References 24 publications

Isometric fiber distribution in the roller drafting zone

Isometric fiber distribution in the roller drafting zone

Study of sliver irregularity caused by fiber acceleration motion during the drafting process

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