Measurement Methods of Dynamic Yarn Tension in a Ring Spinning Process

The productivity of the conventional ring spinning process is currently limited by the frictional heat that occurs in the ring/traveler twisting system. In the framework of a fundamental research project from the German Research Foundation (DFG), the levitation principle of superconducting magnetic bearing (SMB) was implemented as a twisting element in order to eliminate the frictional problem and thus aim, at least, to double the productivity. A mathematical model of the dynamic yarn path has already been presented considering the friction free SMB system up to an angular spindle speed of 25,000 r.p.m. In this paper, the existing theoretical model, which was developed up to 25,000 r.p.m, was further modified considering the balloon control ring and yarn elasticity at a higher angular spindle speed, such as 50,000 r.p.m. The model was solved numerically using the RUNGE-KUTTA method. With this model, it is possible to estimate the yarn tension distribution and balloon form considering the above-mentioned parameters. The model established was further validated by comparing the yarn tension and balloon forms predicted with measured ones up to an angular spindle speed of 15,000 r.p.m in a ring spinning tester based on superconducting magnetic bearing.

Download Full-text

Investigation of Movable Balloon Controller System on a Ring Spinning Frame

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.175-176.474 ◽

2011 ◽

Vol 175-176 ◽

pp. 474-479

Author(s):

Ju Sheng Qiu ◽

Zhi Li Zhong ◽

Huan Guo ◽

Xun Gai Wang

Keyword(s):

Displacement Sensor ◽

Step Motor ◽

Ring Spinning ◽

Yarn Tension ◽

Spun Yarns ◽

The Status ◽

Spinning Process ◽

Linear Module ◽

High Power Consumption

Compared to other spinning system, the ring spinning process has been used to produce higher quality yarns, but with a much lower spinning efficiency, resulted from the relatively high spinning tension that leads to increased yarn breakage rates and makes high power consumption. Thus, depressing yarn tension is essential to change the status. In this paper, we design a movable balloon controller system to reduce yarn tension. The system is automatic, composed of powder switch, touch screen, PLC (Programmable Logic Controller), pulling-thread displacement sensor, controller of step motor, step motor and linear module. PLC, the core of the system, controls the position of the balloon controller by a series of programs. Then yarn tension was tested while spinning with movable balloon control ring, fixed balloon control ring and no balloon control ring, respectively. The result shows that the yarn tension can be depressed indeed by equipping this movable balloon controller system to some extent. Additionally, we find that the number of hairiness of ring spun yarns with this system can be reduced to some extent, while yarn tensile properties are not as sensitive to be worse. It is significant to cut down ends-down rate, improve the quality of ring spun yarns, the spinning efficiency as well as the energy efficiency of ring spinning.

Download Full-text

High-Frequency Yarn Tension Variations in Spinning

Journal of Engineering for Industry ◽

10.1115/1.3183827 ◽

1980 ◽

Vol 102 (1) ◽

pp. 45-50

Author(s):

E. Dyson ◽

G. Afshari

Keyword(s):

Experimental Investigation ◽

Periodic Structure ◽

Coefficient Of Variation ◽

Rotational Speed ◽

High Frequency ◽

Ring Spinning ◽

Statistical Parameters ◽

Yarn Tension ◽

Rotor Spinning

A description of an experimental investigation of the variations in yarn tension during both ring and rotor open-end spinning which have frequencies equal to, or greater than, the rotational speed of the system is given. Typical results are illustrated and discussed both in terms of statistical parameters such as the coefficient of variation and in terms of their spectra. Tension variations during rotor spinning are shown to have, in general, a much less pronounced periodic structure then the corresponding variations during ring spinning.

Download Full-text

Mathematical modeling, simulation and validation of the dynamic yarn path in a superconducting magnet bearing (SMB) ring spinning system

Textile Research Journal ◽

10.1177/0040517516641363 ◽

2016 ◽

Vol 87 (8) ◽

pp. 1011-1022 ◽

Cited By ~ 2

Author(s):

M Hossain ◽

C Telke ◽

M Sparing ◽

A Abdkader ◽

A Nocke ◽

...

Keyword(s):

Permanent Magnet ◽

High Speed ◽

New Technology ◽

Superconducting Magnet ◽

Magnetic Bearing ◽

Ring Spinning ◽

Yarn Tension ◽

Runge Kutta Method ◽

Superconducting Ring ◽

Superconducting Magnetic Bearing

The new concept of a superconducting magnetic bearing (SMB) system can be implemented as a twisting element instead of the existing one in a ring spinning machine, thus overcoming one of its main frictional limitations. In the SMB, a permanent magnet (PM) ring rotates freely above the superconducting ring due to the levitation forces. The revolution of the PM ring imparts twists similarly to the traveler in the existing twisting system. In this paper, the forces acting on the dynamic yarn path resulting from this new technology are investigated and described with a mathematical model. The equation of yarn movement between the delivery rollers and the PM ring is integrated with the Runge-Kutta method using MATLAB. Thus, the developed model can estimate the yarn tension and balloon form according to different spindle speeds considering the dynamic behavior of the permanent magnet of the SMB system. To validate the model, the important relevant process parameters, such as the yarn tension, are measured at different regions of the yarn path, and the balloon forms are recorded during spinning with the SMB system using a high speed camera.

Download Full-text

Reducing Yarn Hairiness in a Modified Ring Spinning Yarn Path by Various Offsets

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.331.493 ◽

2011 ◽

Vol 331 ◽

pp. 493-497

Author(s):

Xu Zhong Su ◽

Wei Dong Gao ◽

Ting Ting Wu ◽

Xin Jin Liu ◽

Yun Zhang

Keyword(s):

Critical Region ◽

Breaking Force ◽

Ring Spinning ◽

Fiber Tension ◽

Yarn Properties ◽

Spun Yarns ◽

Spinning Process ◽

Spinning Triangle ◽

Yarn Hairiness ◽

The Right

Spinning triangle is a critical region in the spinning process of yarn. Its geometry influences the distribution of fiber tension in the spinning triangle and the properties of spun yarns, such as the yarn breakage and hairiness. In this paper, the relationships between the spinning angle and yarn properties especially the yarn hairiness were investigated under various horizontal offsets. The properties of spun yarns produced by the modified system were evaluated and analyzed. Both left diagonal and right diagonal yarn arrangements were examined. The results indicate that the right diagonal yarn path leads to reduce yarn hairiness but the left diagonal yarn path leads to increase yarn hairiness; the breaking force of yarn changes little; yarn evenness deteriorates slightly with the changes of offset.

Download Full-text

Spinning Process and Mechanical Properties Analysis of PTT Filament Core Spun Yarn

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.1207 ◽

2011 ◽

Vol 239-242 ◽

pp. 1207-1210

Author(s):

Yuan Xue ◽

En Long Yang

Keyword(s):

Mechanical Properties ◽

Mechanical Property ◽

Elastic Recovery ◽

Staple Fiber ◽

Ring Spinning ◽

The Core ◽

Outer Sheath ◽

Spun Yarn ◽

Two Component ◽

Spinning Process

The two component filament/staple fiber core-spun yarn is spun on FA506 ring spinning frame with PTT filament as interlaced yarn and Tencel staple fiber as outer sheath. The spinning process and process parameters were analyzed. The morphology, mechanical property and wear-resisting property of two component core-spun yarn were tested. Results indicate that elastic recovery rate of core-spun is up to 90.6%; broken strength is up to 20 cN/tex after boiling water treatment. The core-spun yarn can be used as a new kind of knitting yarn for sweater.

Download Full-text

Evolution Regularity of Temperature Filed in Hot Power Backward Spinning for 7075 Cast Aluminium Alloy Tube

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.1170 ◽

2013 ◽

Vol 774-776 ◽

pp. 1170-1173 ◽

Cited By ~ 1

Author(s):

R.Y. Zhang ◽

S.J. Tu ◽

G.Y. Zhao ◽

J. Wang ◽

Z.H. Guo

Keyword(s):

Aluminium Alloy ◽

Internal Surface ◽

Fe Model ◽

Outer Face ◽

Key Factors ◽

Ring Spinning ◽

Alloy Tube ◽

Temperature Filed ◽

Spinning Process ◽

Lock Ring

The spinning temperature is one of key factors affected the uneven deformation during the hot power backward spinning for brittle material tubes, such as cast 7075 aluminium alloy tube. To analyze the evolution regularity of temperature filed in the spinning process, a 3D thermo-mechanical FE model of the process is developed under ABAQUS/Explicit environment. Then, the evolution of temperature filed during the process is analyzed based on the FE model. The results show that: The contact areas temperatures between lock ring, spinning rollers and tube decrease sharply during the initial spinning stage. The high temperature region is transferred from unformed zone of the tube to the contact area between spinning roller and tube. In the spinning zone, the temperature of internal surface of the tube is apparently higher than that of outer face.

Download Full-text

Analysis of Process and Properties of Stainless Steel Filament Wrapped Yarn Based on Multi-Axial Ring Spinning

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.332-334.743 ◽

2011 ◽

Vol 332-334 ◽

pp. 743-746

Author(s):

Cheng Liang Deng ◽

Zhao Qun Du ◽

Wei Dong Yu

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Process Optimization ◽

Steel Wire ◽

Ring Spinning ◽

Excellent Performance ◽

The Core ◽

Axial Ring ◽

Spinning Process ◽

Core Yarn

A new spinning method was presented to spin three-axial stainless steel filament wrapped yarn by modified ring-spinning, where the stainless steel filament was set as the core yarn and the nylon filament for decoration wrapping the stainless steel filament in the fields of the fabric for Shielding application. A set of process parameters was obtained by the ring spinning frame improvement and spinning process optimization, which realized to spin nylon filament wrapped stainless steel filament yarn. Moreover, the structure, and tensile mechanical properties were measured on the wrapped yarns. The results show that the process can spin stainless steel wire wrapped yarn and acquire the excellent performance of the yarn.

Download Full-text