The Experts below are selected from a list of 129 Experts worldwide ranked by ideXlab platform

Chongwen Yu - One of the best experts on this subject based on the ideXlab platform.

  • a study on fiber motion in the Drafting Zone and hook removal
    Textile Research Journal, 2020
    Co-Authors: Yuanying Shen, Chongwen Yu, Jianping Yang
    Abstract:

    In this study, the hook removal of four types of hooks during the Drafting process has been investigated, and the theory of fiber straightening was further improved by analyzing the relationship be...

  • Modeling fiber arrangement and distribution during the roller Drafting process
    Textile Research Journal, 2019
    Co-Authors: Chongwen Yu, Jianping Yang
    Abstract:

    During the spinning process, the roller Drafting operation plays a significant role in attenuating the sliver to an appropriate linear density. In this study, the model of fiber arrangement was applied to simulating the roller Drafting process in order to shed light on the sliver dynamic behavior in the Drafting Zone. The Drafting process was operated from the high-velocity motion of the first accelerated fiber to the high-velocity motion of the last accelerated fiber. The proposed model showed that the simulated sliver attenuation processes were highly corresponded to the actual sliver attenuation results. In addition, the results revealed that the draft ratio, gauge length, input sliver linear density and accelerated-point distribution form had effective influences on the attenuation curves of sliver linear density, whilst the delivery speed scarcely had any effect. The fiber distributions of various forms were also investigated specifically and quantitatively from the fiber arrangement during the draft...

  • Fiber motion and the accelerated point distribution in roller Drafting
    Textile Research Journal, 2018
    Co-Authors: Kudakwashe D Mupfudze, Yuanying Shen, Chongwen Yu
    Abstract:

    In this study, the tracer fiber method was used to determine the accelerated point distribution in both the break draft and main Drafting Zone of the drawing frame with varying different draft para...

  • A study of the Drafting force in roller Drafting and its influence on sliver irregularity
    Journal of The Textile Institute, 2011
    Co-Authors: William Oxenham, Chongwen Yu
    Abstract:

    Drafting force is the direct and intuitive factor resulting in fiber motion in a Drafting Zone. Utilizing data collected from an ITT Draftometer, this paper discusses the effect of draft ratio and ratch in both the break and the main draft Zones on Drafting force and the coefficient of variation (CV) of Drafting force, and how these in turn affect sliver and yarn irregularity. It is shown that: the draft settings in the break draft Zone have a significant effect on the Drafting force; the break draft ratio shows distinct relationship with sliver irregularity; the ratch in the main Drafting Zone has considerable influence on Drafting force; and in the experiments reported the Drafting force does not directly relate to final yarn irregularity.

  • The influence of fiber length distribution on the accelerated points in Drafting: A new perspective on Drafting process
    Fibers and Polymers, 2009
    Co-Authors: Chongwen Yu
    Abstract:

    The distribution of the accelerated points of fibers in roller Drafting is the key to the evenness of the drafted slivers. The fiber length distribution is believed to affect the accelerated points. This approach is trying to give a quantitative expression of the influence. A parabolic density function is introduced for the expression of density functions and a generalized method is presented. The experiment shows that the parabolic-type density function is a better explanation for the distribution of the accelerated points in the Drafting Zone in terms of the consequent yarn unevenness. The statistical test verifies the distribution type. The analysis helps to understand the mechanism of the roller Drafting and can be used in the optimization of the parameters in roller Drafting.

R Murugan - One of the best experts on this subject based on the ideXlab platform.

  • optimization of Drafting Zone variables in ring spinning for the production of cotton milkweed blended yarns
    Indian Journal of Fibre & Textile Research (IJFTR), 2016
    Co-Authors: T Karthik, R Murugan
    Abstract:

    Cotton/milkweed (60/40) blended yarn of 29.5 tex has been produced on a ring spinning system. The influence of fibre friction, front Zone roller setting and front top roller pressure at speed frame and ring frame on yarn properties has been studied using the Box and Behnken design. The optimum conditions within the processing limits of the machines are established. It is observed that a higher fibre friction gives higher yarn tenacity and lower yarn unevenness, imperfection and hairiness. The roller setting and top roller pressure also influence the yarn properties at speed frame and ring frame. With the increase in roller setting the yarn tenacity increases initially and then decreases, while other yarn properties deteriorate at wider roller settings. The increase in top roller pressure leads to reduction in yarn unevenness, imperfection and hairiness due to better control of milkweed fibres in the Drafting Zone. In general, blends of cotton/alkali-treated milkweed fibres with moderate to lower roller setting and moderate to higher level of top roller pressure give better results.

  • Optimization of Drafting Zone variables in ring spinning for the production of cotton/milkweed blended yarns
    2016
    Co-Authors: T Karthik, R Murugan
    Abstract:

    Cotton/milkweed (60/40) blended yarn of 29.5 tex has been produced on a ring spinning system. The influence of fibre friction, front Zone roller setting and front top roller pressure at speed frame and ring frame on yarn properties has been studied using the Box and Behnken design. The optimum conditions within the processing limits of the machines are established. It is observed that a higher fibre friction gives higher yarn tenacity and lower yarn unevenness, imperfection and hairiness. The roller setting and top roller pressure also influence the yarn properties at speed frame and ring frame. With the increase in roller setting the yarn tenacity increases initially and then decreases, while other yarn properties deteriorate at wider roller settings. The increase in top roller pressure leads to reduction in yarn unevenness, imperfection and hairiness due to better control of milkweed fibres in the Drafting Zone. In general, blends of cotton/alkali-treated milkweed fibres with moderate to lower roller setting and moderate to higher level of top roller pressure give better results.

Wang Hong - One of the best experts on this subject based on the ideXlab platform.

T Karthik - One of the best experts on this subject based on the ideXlab platform.

  • optimization of Drafting Zone variables in ring spinning for the production of cotton milkweed blended yarns
    Indian Journal of Fibre & Textile Research (IJFTR), 2016
    Co-Authors: T Karthik, R Murugan
    Abstract:

    Cotton/milkweed (60/40) blended yarn of 29.5 tex has been produced on a ring spinning system. The influence of fibre friction, front Zone roller setting and front top roller pressure at speed frame and ring frame on yarn properties has been studied using the Box and Behnken design. The optimum conditions within the processing limits of the machines are established. It is observed that a higher fibre friction gives higher yarn tenacity and lower yarn unevenness, imperfection and hairiness. The roller setting and top roller pressure also influence the yarn properties at speed frame and ring frame. With the increase in roller setting the yarn tenacity increases initially and then decreases, while other yarn properties deteriorate at wider roller settings. The increase in top roller pressure leads to reduction in yarn unevenness, imperfection and hairiness due to better control of milkweed fibres in the Drafting Zone. In general, blends of cotton/alkali-treated milkweed fibres with moderate to lower roller setting and moderate to higher level of top roller pressure give better results.

  • Optimization of Drafting Zone variables in ring spinning for the production of cotton/milkweed blended yarns
    2016
    Co-Authors: T Karthik, R Murugan
    Abstract:

    Cotton/milkweed (60/40) blended yarn of 29.5 tex has been produced on a ring spinning system. The influence of fibre friction, front Zone roller setting and front top roller pressure at speed frame and ring frame on yarn properties has been studied using the Box and Behnken design. The optimum conditions within the processing limits of the machines are established. It is observed that a higher fibre friction gives higher yarn tenacity and lower yarn unevenness, imperfection and hairiness. The roller setting and top roller pressure also influence the yarn properties at speed frame and ring frame. With the increase in roller setting the yarn tenacity increases initially and then decreases, while other yarn properties deteriorate at wider roller settings. The increase in top roller pressure leads to reduction in yarn unevenness, imperfection and hairiness due to better control of milkweed fibres in the Drafting Zone. In general, blends of cotton/alkali-treated milkweed fibres with moderate to lower roller setting and moderate to higher level of top roller pressure give better results.

Bojun Xu - One of the best experts on this subject based on the ideXlab platform.

  • Research on the Compact-Siro Spun Yarn Structure
    Fibres & Textiles in Eastern Europe, 2015
    Co-Authors: Xuzhong Su, Bojun Xu
    Abstract:

    Compact-Siro spinning technology is one of the most widely used spinning methods. It is conducted on a compact ring frame by simultaneously feeding two rovings into the Drafting Zone at a predetermined separation. In fact, Compact-Siro spinning incorporates the features of both Compact and Siro-spinning systems. In this paper, the structure of CompactSiro spun yarn is investigated. By using a DZ3 video microscope, the horizontal structure of Compact-Siro spun yarn, Sirospun yarn, Compact yarn and Ring spun yarn were obtained. It is shown that compared with Compact single yarn, Compact-Siro spun yarn has a more compact and clear surface structure, a more uniform and smooth shape, and less hairiness. Then the cross section structure of Compact yarn and Compact-Siro spun yarn were obtained by using Hardy’s Y172 thin cross-section sampling device and the DZ3 video microscope. It is shown that compared with Sirospun yarn, the cross-section of Compact-Siro spun yarn is smoother and closer to being circular. Meanwhile in the Compact-Siro spun yarn body, the fibers of two substrands show axial symmetrical distribution approximately, which is beneficial for spun yarn qualities, especially for improving the yarn evenness and hairiness. Finally the results obtained were illustrated in spinning experiments.