Research on flow field in a modified ring spinning system with the air nozzle

Liu, Xinjin; Su, Xiaolei

doi:10.1080/00405000.2016.1171480

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…This is why a false twisting device was added to impart false twist in the spinning triangle zone, that is, in the weakest point of the yarn path located immediately after the front rollers of the drafting system, to increase process stability and yarn quality. [71][72][73][74][75][76][77][78][79][80][81][82][83] Yilmaz has studied the characteristic properties of the yarn by integrating a false twisting device comprised of air nozzles between the drafting system and yarn guide to reduce the yarn hairiness up to an angular spindle speed of 10,000 rpm in the conventional ring spinning process (Figure 20). 71 The objective of integrating the pre-twisting device was to bind the projected fibers onto the yarn body by the swirling airflow in the nozzle.…”

Section: Multi-balloon (Or Spinhole) Technologymentioning

confidence: 99%

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A critical review on recent developments and solutions in the high-speed ring spinning process

Abdkader,

Hossain

2023

Textile Research Journal

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Twist plays an important role in textile technology, particularly in the production of staple yarn structures. Due to the higher yarn quality and flexibility of the process, most short staple fiber yarns are produced in the ring spinning process in comparison to other high-speed spinning processes, such as rotor or air jet spinning. To impart twist in the yarn, the ring/traveler system, rotor and air jet nozzle are used in the ring, rotor and air jet spinning processes respectively. However, the productivity of the ring spinning process is limited significantly due to the frictional heat generated between the ring and traveler, especially at higher angular spindle speeds, which is crucial for the spinning of man-made fibers. This paper aims to describe the recent developments and solutions for increasing productivity in the ring spinning process in a systemic way. To reduce the friction, different topologies and surface modifications in the ring/traveler system were made to increase the angular spindle speed of maximum 23,000 rpm. To eliminate the friction, the twisting element was made of an air bearing or magnetically elevated rings were developed by replacing the ring/traveler system completely, thus permitting a higher angular spindle speed of up to 50,000 rpm. Further approaches deal with cap, loop and nova spinning or Nu-Torque technology to reduce yarn tension or residual torque in the yarn, respectively. The results of the presented work reveal the potential of different developments, especially in the field of twisting system, so that the productivity of ring spinning can be increased drastically.

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Section: Multi-balloon (Or Spinhole) Technologymentioning

confidence: 99%

Section: Adding a False Twisting Devicementioning

confidence: 99%

A critical review on recent developments and solutions in the high-speed ring spinning process

Abdkader,

Hossain

2023

Textile Research Journal

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“…Vortex spinning is a pneumatic spinning method and widely used in the textile industry [ 1 , 2 , 3 ]. It can be viewed as a refinement of jet spinning, or a natural development in fascinated yarn technology, which enables the yarns to exhibit better evenness and tenacity values [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Control of Macromolecule Chains Structure in a Nanofiber

Tian

2020

Polymers

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Mechanical property is one of the most important properties of nanofiber membranes. Electrospinning is widely used in the preparation of nanofibers due to its advantages such as good stability and easy operation. Compared with some nature silk, the mechanical properties of nanofibers prepared by electrospinning are poor. Based on the principle of vortex spinning and DNA structure, this paper designed an air vortex electrospinning device that can control the structure of macromolecular chains in nanofibers. When a weak air vortex is generated in the electrospinning process, the macromolecule chains will entangle with each other and form a DNA-like structure so as to improve the mechanical property. In addition, when a strong air vortex is generated during the electrospinning process, the nanofibers will adhere to each other, thereby enhancing the mechanical property and enlarging the pore size.

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