Yarn Winding Research Articles

Comparative Analysis of Winding of Multiple Yarns on Automated Winding Machine

In this work, an automated yarn winding machine for small-scale industry is attempted to be designed and developed. Any nation’s economy benefits greatly from the textile industry, but in India, where it employs almost 66 million people, this is particularly true. The demand for premium yarn is rising along with the ready-to-wear industry. In order to determine if it is feasible to wind a rod of varying length on an automated winding machine, a comparative investigation of the various yarn materials is conducted in this paper. A few phenomena that may cause yarn strength to decline are also investigated. This led to the discovery that non-traditional winding procedures produce better results than conventional winding approaches. In this the experiments performed on cotton, polyester and wool and compared analysis is done.

Optimization and experimental validation of reinforcing fibers winding pattern for carbon/carbon composite crucible preform

In order to address the problem of transition slip between the cylindrical segment and the ellipsoidal head segment of the carbon/carbon composite crucible preform with asymmetrical structure during the winding process, a winding pattern combining geodesic and non-geodesic is presented innovatively. Firstly, the formulae for the winding angle and the winding central rotation angle of the crucible cylindrical segment and the ellipsoidal head segment are established, and the fourth-order Runge-Kutta numerical method is employed for parametrical design. The two-tangent point winding path is determined by analyzing the effect of the cylindrical segment’s winding pitch, different ellipsoidal head segment heights, and slip coefficient on the winding angle. Secondly, the needle disk winding method is proposed to address the slight winding angle at the open end of the cylinder, making it easier to hang the yarn. Finally, the experiment on dry yarn winding of 3k carbon fiber (linear density: 198 g/km) is carried out. The results indicate that the relative error rate between the actual winding angle and the theoretical design angle differs by no more than 1.66%, demonstrating that carbon fibers can be stably and uniformly wound onto the surface of the carbon/carbon composite crucible preform. Compared to the traditional manual winding method, the winding pattern enhances winding efficiency, ensures carbon fibers’ uniformity and structural stability, and provides a new technological approach to producing high-performance composite materials.

Computer Modelling of Yarn Winding on Conical Bobbins

The article presents the results of the computer modelling of yarn winding on conical bobbins based on the analytical method of constructing tubular-shaped surfaces as a partial case of channel surfaces using the vector algebra apparatus. It is stated that the guide line takes the shape of a conical spiral line along which the forming moves (in the form of a circle with a diameter equal to the average diameter of the yarn), and is set using the moving Frenet basis. The obtained mathematical models facilitate the building, in MathCAD 3D visualization graphics, of a tubular-shaped surface, which represents the layers of yarn winding on a conical cartridge, and the reinforced yarn, which comprise the core component and the wrapping component, as well as the determination of both the lengths of individual layers of winding and the total length of winding (not including the transition sections). Well-known methods of forming geometric objects and computer modelling were also used in the work. The theoretical studies are based on the basic principles of textile production technology.

Yarn Winning Machine Design

A mop is a very simple tool, but it is very much needed in society, especially to help with household work. In this final project the author tries to make a thread roller to process the manufacture of mops. The basic material for making mops is 0.85 cotton yarn and the waste material is clothing waste. The design of a tool with results that can support the need for the manufacture of basic materials in the production of mops, which is expected to be useful for the textile industry, which can meet market needs and can be used as a home industry so that it can improve people's living standards. In the design of the Yarn Winding Machine above, it can be produced: the diameter of the driving pulley is 100 mm and the diameter of the pulli being driven is 100 mm. The ratio of the pulli on the drive shaft to the pulli being driven is 1: 1, the main shaft of 19 mm can deliver 144 watts of power. These machines have a transmission system driven by an electric motor HP/1400 rpm/1 phase by using a large pulley of 210 mm with a small pully diameter of 45 mm. Belts used with L = 813 mm with a total of 2 pieces can connect a power of 144 watts.

Mathematical Modeling of Yarn Winding Tension

Mathematical Modeling of Yarn Winding Tension

Aktivasi Nilai Pendidikan Dalam Konsep Aswaja

Education in Indonesia is like being in a tangled yarn winding. Growth is lush yet full of mud and moss. There is a happy face, but there was an air-rada rada black. Simply put, our education (Indonesia) like a ship sailing aimlessly and goals. Appeared later than this confusion about the various interpretations of education in Indonesia. Such as Character Education, Cultural Value-Based Education, Social, Religious and others. The times, the movement of ideas and seek solutions to the problems of education in Indonesia continues to grow. A number of researchers, experts and practitioners work together to look for the hallmark of education in Indonesia. Various methods and stratgei done in order to find distinctive character education formulations ness. There are various kinds of character education are taken from the values of both groups, a particular doctrine or custom. This new discovery is the responsibility of the observer forms, practitioners and education experts on wajahpendidikan in Indonesia. One of these ideas Aswaja Value-Based Character Education. Is this keaswajaan effective and could be part of the establishment of the nation's private good?

Empirical model for matching spectrophotometric reflectance of yarn windings and multispectral imaging reflectance of single strands of yarns.

The state-of-the-art multispectral imaging system can directly acquire the reflectance of a single strand of yarn that is impossible for traditional spectrophotometers. Instead, the spectrophotometric reflectance of a yarn winding, which is constituted by yarns wound on a background card, is regarded as the yarn reflectance in textile. While multispectral imaging systems and spectrophotometers can be separately used to acquire the reflectance of a single strand of yarn and corresponding yarn winding, the quantitative relationship between them is not yet known. In this paper, the relationship is established based on models that describe the spectral response of a spectrophotometer to a yarn winding and that of a multispectral imaging system to a single strand of yarn. The reflectance matching function from a single strand of yarn to corresponding yarn winding is derived to be a second degree polynomial function, which coefficients are the solutions of a constrained nonlinear optimization problem. Experiments on 100 pairs of samples show that the proposed approach can reduce the color difference between yarn windings and single strands of yarns from 2.449 to 1.082 CIEDE2000 units. The coefficients of the optimal reflection matching function imply that the reflectance of a yarn winding measured by a spectrophotometer consists of not only the intrinsic reflectance of yarn but also the nonignorable interreflection component between yarns.

A multispectral imaging approach to colour measurement and colour matching of single yarns without winding

This paper investigates a multispectral imaging approach to colour measurement and colour matching of single yarns. The small size of a single yarn makes it impossible for spectrophotometers directly to acquire its spectral reflectance. Multispectral imaging systems, on the other hand, have the potential to measure the reflectance of single yarns as they can record both the spectral and the spatial information of a sample. A multispectral imaging system, namely imaging colour measurement, has been developed to conduct colour measurement of single yarns. A single yarn is first detected from backgrounds by a modified K‐means clustering method. The reflectance of the single yarn is then specified by an averaging method. Comparative experiments based on 100 pairs of single yarns and corresponding yarn windings show that the reflectance magnitude of a single yarn acquired by imaging colour measurement is smaller than that of corresponding yarn winding measured by a Datacolor 650 spectrophotometer. Experiments on 16 single yarns show that the repeatability and spatial reproducibility of the imaging colour measurement system in measuring a single yarn colour are 0.1185 and 0.2827 CMC(2:1) units. A colour matching comparison experiment (pass or fail), using 24 pairs of single yarns and corresponding pairs of solid‐colour yarn dyed fabrics, shows that single yarns measured by imaging colour measurement can achieve similar colour matching results to solid‐colour yarn dyed fabrics measured by the Datacolor 650 spectrophotometer, with degrees of similarity of 87.5 and 83.3% when the CMC(2:1) and CIE2000(2:1:1) colour difference formulas are employed.

Recent Studies on Yarn Tension and Energy Consumption in Ring Spinning

High energy consumption remains a key challenge for the widely used ring spinning system. Tackling this challenge requires a full understanding of the various factors that contribute to yarn tension and energy consumption during ring spinning. In this paper, we report our recent experimental and theoretical research on air drag, yarn tension and energy consumption in ring spinning. A specially constructed rig was used to simulate the ring spinning process; and yarn tension at the guide-eye was measured for different yarns under different conditions. The effect of yarn hairiness on the air drag acting on a rotating yarn package and on a ballooning yarn was examined. Models of the power requirements for overcoming the air drag, increasing the kinetic energy of the yarn package (bobbin and wound yarn) and overcoming the yarn wind-on tension were developed. The ratio of energy-consumption to yarn-production over a full yarn package was discussed. A program to simulate yarn winding in ring spinning was implemented, which can generate the balloon shape and predict yarn tension under a given spinning condition. The simulation results were verified with experimental results obtained from spinning cotton and wool yarns.

REDUCING YARN HAIRINESS IN WINDING BY MEANS OF JETS: OPTIMISATION OF JET PARAMETERS, YARN LINEAR DENSITY AND WINDING SPEED

Abstract Reducing yarn hairiness during yarn winding by the use of air jets is a new approach, since the production rate of winding is very high and the process itself increases yarn hairiness. The Box & Behnken factorial design approach has been used to optimise the jet angle, the jet diameter, yarn linear density and the winding speed in order to reduce the yarn hairiness. A jet angle of 450, a jet diameter of 2.2 mm, 10 tex yarn and a winding speed of 800 m/min give the optimal results in terms of reducing the hairiness. A CFD (computational fluid dynamics) model has been developed to simulate the airflow pattern inside the jets with the use of Fluent 6.1 software. The air velocity around the core of the jet is the influencing factor in wrapping the hairs on the yarn body.

Innovation in Linen Manufacture

This monograph traces the various means by which flax fibre is transformed into linen yarns and fabrics. The principal innovations and developments of the past fifty years are identified. An extensive range of relevant literature is reviewed. Details are given of how the fibre is extracted from the stem of the flax plant and of the stages of yarn and fabric production. An explanation is given of how yarns are produced from short fibres (known as tow) using carding, drafting and dry spinning, and from long fibres (known as line) using hackling, drafting, doubling, roving and wet spinning in warm water. Further areas covered include yarn winding, linen weaving, dyeing and finishing. New applications for flax fibre, beyond traditional uses in apparel or furnishing fabrics, are also identified.

Minimizing Energy Consumption of Yarn Winding in Ring Spinning

Ring spinning has been and will continue to be an important system for making staple yarns from different fibers in the textile industry. But high power consumption and low productivity remain the two outstanding problems with ring spinning. Based on an analysis of power distribution during yarn winding in ring spinning, models for the ratio of energy consumption to yarn production over a full yarn package are established. Spindle speed, yarn count, and package diameter are the three key parameters affecting this ratio. The effects on energy consumption of these parameters are discussed through a case study. The energy-to-production ratio increases with increased package diameter but decreases with increased spindle speed and/or yarn count (tex). The results will help guide spinners in minimizing energy consumption in ring spinning.

Distribution of Power Requirements During Yarn Winding in Ring Spinning

A model of a yam package is established for a ring spinning system. The yarn layer, surface area, and mass of the yam package are formulated with respect to the diameters of the empty bobbin and full yarn package, yarn count, and yarn winding-on time. Based on the principles of dynamics and aerodynamics, models of the power requirements for overcoming the skin friction drag, increasing the kinetic energy of the yarn package (bobbin and wound yarn), and overcoming the yarn wind-on tension are developed. The skin friction coefficient on the surface of a rotating yam package is obtained from experiment. The power distribution during yam packaging is discussed based on a case study. The results indicate that overcoming the skin friction drag during yarn winding consumes the largest amount of energy. The energy required to overcome the yarn wind-on tension is also significant.

Stitch Length Variation in Circular Knitting Machines Due to Yarn Winding Tension Variation in the Storage Yarn Feed Wheel

The yarn delivery rate required to knit a given stitch quality on a multifeeder circular knitting machine is generally based on the belt speed of the positive yarn feed system. The actual stitch length in the fabric measured after knitting is always less than the stitch length required. Yam tension immediately before the yarn is wound on the storage yarn feed wheel is the main cause of this problem. This paper investigates the tension build-up of the yam on its way from the yarn, package to the storage yarn feed wheel. Several fabric samples are knitted with different winding tensions to the storage yam feed wheel, and the stitch lengths of the samples are measured. The results show that the stitch length is largely affected by the winding tension to the storage yarn feed wheel.

Effect of chemical modification on the performance of biodegradable jute yarn-Biopol® composites

Jute yarn-Biopol® composites are prepared by hot-press moulding technique. Jute yarns of two varieties (7.36 lbs/spy and 11.86 lbs/spy) are used for composite fabrications. Effects of temperature, yarn amount, chemical modification like dewaxing (defatting), alkali treatment, graft copolymerization and orientation of yarn winding on the performance of resulting composites have been investigated. The mechanical properties like tensile strength, bending strength, impact strength and bending-E-modulus increased substantially in comparison to pure Biopol® as a result of reinforcement with jute yarns. The most remarkable observations of our present investigations include more than 150% enhancement in tensile strength, impact strength, bending-E-modulus and more than 50% enhancement in bending strength of the resulting composites as compared to pure Biopol® sheets. Amount of jute yarn, chemical modifications and measurement of mechanical properties on the direction of winding of yarns contribute significantly to the mechanical properties of resulting composites.

A device for the take-up of pneumatically tangled acetate yarns onto a spinning package

Three variants of take-up and winding devices have been developed; these permit one to take up yarn from the spinning machine onto a commercial package by a frictionless method and ensure a constant linear velocity of yarn winding.

Calculation of the elastic deformation of textile beams during yarn winding

The problem of winding yarn on beams is examined. A theoretical calculation of the pressures on and the deformation of the beams is developed. In a first approximation the beam is assumed to be completely rigid and in a second approximation the elasticity of the barrel and flanges is taken into account. The results, developed on several types of yarn and on beams of various shapes and forms, are compared with experimental data obtained during a series of tests by the I.D.I. of Turin, Italy, on beams during use.

リング精紡, 撚糸機の巻取りについて

リング精紡, 撚糸機の巻取りについて

リング精紡, 撚糸機の巻取りについて

リング精紡, 撚糸機の巻取りについて