Trajectories of fibers and analysis of yarn quality for compact spinning with pneumatic groove

Hai-ping, Dou; Liu, Shirui

doi:10.1080/00405000.2010.515728

Cited by 21 publications

(15 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CFD has become the most powerful tool at present (Dou & Liu, 2011;Zou, Cheng, & Hua, 2010), which is built on the physical model and CFD method, and can be used to analyze the physical phenomena involving fluid flow and heat conduction. Finite element method (FEM) is one of the most commonly used CFD on analyzing fluid flow .…”

Section: Introductionmentioning

confidence: 99%

Effects of lattice apron density on yarn qualities in Four-line compact spinning system

Liu

Zhang

2016

The Journal of The Textile Institute

View full text Add to dashboard Cite

In the paper, using finite element method (FEM), the effects of lattice apron density on yarn qualities in Four-line compact spinning system were studied by analyzing the numerical simulations of the airflow velocity. Firstly, three different kinds of yarns, 18.2tex (32 S ), 9.7tex (60 S ), and 5.8tex (100 S ), were spun on FA507B spinning frame equipped with lattice aprons of mesh size 150, 120, and 100, respectively. The hairiness, breaking strength, and evenness of spun yarns were tested and comparatively analyzed. Secondly, using FEM, the numerical simulations of the airflow velocity in the condensing zone were presented. The finite element model of condensing zone was constructed according to the physical parameters of the practical system. Then, the simulation of airflow velocities on five straight lines located in the front, middle, and back of condensing zone were given. It is shown that, in the whole condensing zone, for the lattice apron with mesh size 100, the direct transverse condensing force is high, but the assisted condensing force is low and disorder, which is not beneficial for yarn qualities. Compared to the lattice apron with mesh size 150, the usage of lattice apron with mesh size 120 may be beneficial for the high-count yarn condensing or the yarn condensing under the relatively lower negative pressures. Furthermore, taking the 9.7tex as an example, the trajectory of yarn movement in the condensing zone was given using high-speed camera system OLYMPUS i-speed3. Corresponding airflow velocities along the yarn movement path were presented.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of lattice apron density on yarn qualities in Four-line compact spinning system

Liu

Zhang

2016

The Journal of The Textile Institute

View full text Add to dashboard Cite

show abstract

“…The usages of ring spinning in about 90% of the world spinning industry make it the most popular method for short staple fiber [5]. Compact spinning attachment is trumped among various techniques not only for improvement of yarn quality but also meeting the customer's criteria and improves subsequent processes weaving, knitting, and dying in terms of increasing productivity [6][7][8]. It is a fundamental modification of traditional ring spinning because it allows to condense the fiber bundle as well as to decrease the spinning triangle [9,10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Lattice Apron Age on the Quality of Compact Ring-Spun Yarns

Raian

Hossen

2018

TTEFT

View full text Add to dashboard Cite

The compact spinning technique is one of the major improvements of classical ring spinning which has superior yarn structure and quality in terms of hairiness and strength. With a view to achieve, this paper reveals the significant correlation of differently aged lattice aprons of sussen compact spinning attachment with different yarn quality characteristics and fitting both simple and multiple linear regression equation. The 100% cotton compact yarns of 30's Ne are spun with differently aged lattice apron from the same cotton fibers, same roving and on the same spindles of the same ring frame with keeping the machine speed and doff length constant. The unevenness of mass variation U%, imperfection index (IPI), hairiness (H), countstrength-product (CSP), tenacity, elongation% of yarns are tested with quality control equipment and analyzed. Comparing with the new to 10-month aged lattices apron the evenness, strength, imperfections, and hairiness of produced yarns show decrement trends with an increment in elongation. The established multiple linear regression fitting line elicits the manufacturers to predict the quality of compact ring spun yarns.

show abstract

“…The pneumatic system is the dominant one, which adopts perforated drum, perforated apron or lattice apron as condensing elements. 5,6 The roving strand emerging from the front roller nip is condensed by negative pressure airflow produced by the aforementioned elements. The air current is running in open space, which caused high additional energy consumption during spinning process.…”

Section: Introductionmentioning

confidence: 99%

Nozzle based compact spinning

Wang¹,

Xue²,

Cheng³

2018

JTEFT

View full text Add to dashboard Cite

Compact spinning is one of the most successful innovations in the 21st century in spinning industry. Today, the available dominant compact spinning systems are the pneumatic compact spinning systems, which adopt perforated drum, perforated apron or lattice apron as condensing elements. In this paper a novel pneumatic compact spinning is proposed, that is, a precisely designed nozzle as the condensing element and a holding roller were added on the conventional ring spinning frame. When a conventionally drafted roving strand passes by the front nip, it will immediately enter the cavity of the nozzle and is affected by the inside vortex, which finally resulted into a partially wrapped and thinner round structure. The structure of the fiber strands delivered from the holding roller was viewed and recorded through the consecutive pictures. The 4 cases of wrapping structure were statistical analyzed. The results show that more than 1/4 strands are in wrapped structure. The width of the fiber strand passing by the nozzle was measured, which is significantly narrowed, compared with the fiber strand before entering the nozzle. According to the principle of compact spinning, a viable yarn with less hairiness may be produced from this system.

show abstract

Trajectories of fibers and analysis of yarn quality for compact spinning with pneumatic groove

Cited by 21 publications

References 3 publications

Effects of lattice apron density on yarn qualities in Four-line compact spinning system

Effects of lattice apron density on yarn qualities in Four-line compact spinning system

Effect of Lattice Apron Age on the Quality of Compact Ring-Spun Yarns

Nozzle based compact spinning

Contact Info

Product

Resources

About