Study of yarn properties and displacement deviation of acceleration points based on the novel drafting system

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

doi:10.1080/00405000.2021.2024344

Cited by 1 publication

(3 citation statements)

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“…The unevenness of the yarn is typically recognized to be linked to fiber movement. 21,27 The drafting device’s operation and the distribution of friction forces in the main drafting zone have a significant impact on controlling the accelerations of floating fibers. As previously mentioned, the pressure distribution of the NDS features more and higher peaks than that of the DAD, which improves fiber movement control and reduces the number of floating fibers.…”

Section: Resultsmentioning

confidence: 99%

“…Importantly, the nose bar of the curved top pin helps shorten the floating zone by extending and improving the friction forces in the main drafting zone, which concentrates the distribution of fiber acceleration points to the front roller nip and results in more uniform yarns. 21…”

Section: Structures Of the Dad And Ndsmentioning

confidence: 99%

“…Inspired by the preceding research, Quan et al. 20,21 conducted several pieces of research on a novel drafting device, analyzing the mechanism of the novel drafting unit and comparing yarn properties between novel yarns and traditional yarns. In this study, the external friction fields of the DAD and novel drafting system (NDS) were characterized by the finite element method (FEM), unraveling the different operation patterns in the main drafting zone.…”

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confidence: 99%

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Finite element modeling and experimental investigation between the novel drafting and double-apron drafting systems

Quan

Cheng

et al. 2022

Textile Research Journal

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The ring spinning frame featuring the double-apron drafting device is the most widely used method due to its various advantages. The finite element method and experiments were conducted to study the double-apron drafting unit and the novel drafting system. The novel drafting system is characterized by a curved drafting zone and curtate floating zone due to the elimination of the double-apron drafting unit’s double rubber aprons and the innovation of the pins. The finite element results of the double-apron drafting unit and novel drafting system demonstrate that the external friction field in the drafting zone of the double-apron drafting unit is composed of straight-line segments from the pin nip to the middle roller nip. In contrast, the force in the novel drafting system is akin to undulations and exhibits stronger and smoother distribution. In experiments, the double-apron drafting unit and novel drafting system were installed on the ring spinning and compact spinning frames, namely the double-apron drafting unit-ring spinning, double-apron drafting unit-compact spinning, novel drafting system-ring spinning and novel drafting system-compact spinning, to study the slippage rates and yarn properties. It can be seen that the slippage rates of rubber aprons in the double-apron drafting unit-ring spinning vary from 5.84% to 6.89%, while the slippage rates of the lattice apron in the novel drafting system-ring spinning range from 0.39% to 0.66%. In addition, the yarn properties produced by the novel drafting system-ring spinning and novel drafting system-compact spinning, including yarn evenness, imperfections and strength, outstrip those produced by the double-apron drafting unit-ring spinning and double-apron drafting unit-compact spinning.

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Section: Resultsmentioning

confidence: 99%

Section: Structures Of the Dad And Ndsmentioning

confidence: 99%

mentioning

confidence: 99%

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