Optimal design of the horn gear for rotary three-dimensional braiding machine

Du, Chengjie; Meng, Zhuo; Sun, Yize; Yu, Jianyong

doi:10.1080/00405000.2020.1716530

Cited by 5 publications

(7 citation statements)

References 9 publications

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“…A weft insertion mechanism via magnetic actuation can also save 60% of energy 35 . Eliminating processing steps is another noticeable development in textile conversion [36][37][38] . Another example is the combination of spinning and knitting pro-cesses in a single machine that allows the direct input of fibre slivers or roving into a circular knitting machine, thus eliminating ring spinning and yarn storage and saving energy, space and operational costs; reducing CO2 emissions; and improving product quality 39 .…”

Section: Textile Conversionmentioning

confidence: 99%

Advancing life cycle sustainability of textiles through technological innovations

et al. 2022

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Throughout their life cycle, textiles produce 5-10% of global greenhouse gas emissions and consume the second-largest amount of the world's water with polluting microplastics and chemical agents released to waterways. Here we examine the state-of-the-art technology developments meant to solve these problems in a cradle-to-grave fashion. We analyse their impacts with respect to the Sustainable Development Goals in the United Nations Agenda 2030, particularly those concerning the deployment of natural resources, energy and environmental impacts. We follow a systematic analytical framework that identifies and elucidates impactful technologies. We further discuss future directions along which the green transformation of textiles could be accelerated.Textile products have a global market valued at US$961.5 billion, with major sectors in apparel (~75%), technical textiles (~12%) and household goods (~9%) 1 . Approximately 90 billion articles of clothing, or 62 Mt, are manufactured and sold each year 2 . Apart from meeting essential clothing needs, the textile supplier chain provides ample employment opportunities, fuels economic and social developments, and improves well-being and life quality, especially in developing countries.The life cycle of textile and apparel products involves different stages and players because the product supply chain is long, highly branched and globalized, as shown in Fig. 1. The life cycle begins with making or harvesting raw materials for textile fibres, originating from plants, animals and petroleum, among other sources, thus involving the agriculture and chemical industries. Fibre production routes vary greatly, from harvesting from plants or animals to fibre forming through methods such as melt spinning, dry spinning and wet spinning. At the textile conversion stage, fibres or fibre blends are used to make yarns and fabrics with the desired tenacity, durability, colour, pattern and hand feel. Products such as garments require further processing to realize the final forms to be used by consumers. The distribution stage involves logistics, wholesalers and retailers. Product cleaning and care are normally conducted at home as laundry at the usage stage. The disposal stage has several branches; the used products may be sent to landfills or incinerators or alternatively recycled or reused. Since the suppliers of This is the Pre-Published Version.

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Section: Textile Conversionmentioning

confidence: 99%

Advancing life cycle sustainability of textiles through technological innovations

et al. 2022

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“…The same motion is available with lace braiding machines as well, [5][6][7] and in this "the maypole" is not correctly assigned to only one class of machines. Many authors use "rotary braiding machines" in this case, [8][9][10][11] where in reality, the term "rotary braiding" can be assigned as well on the lace principle because the gear plates are rotating there too. 12 A very clear difference between these principles is the continuity of the motion -the commonly used braiding machines with horn gears and full and empty slots has continuously rotating horn gears and the lace technology-based machines have clearly discontinuous motion of the gear plates, which alternate between stopping and rotating.…”

Section: Terminological Clarificationmentioning

confidence: 99%

“…A 3D braiding machine with a larger number of gears is reported in Guowei et al 11 and two-time bifurcated braids are demonstrated. In the latest research on machine development, Du et al 8 investigate the optimal design of the gears for such machines, which allow a continuous process. Improvement of the carriers for the reduction of fluctuations in carbon fiber tension is reported in Hu et al 21,22 The mathematical modeling of the friction between yarns is reported by Zhang et al 23 All these works demonstrate that 3D braiding with continuously rotating horn gears has reached maturity as a technology and equipment and increases its application areas.…”

Section: State Of the Machine Developmentmentioning

confidence: 99%

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Carrier delay-based method for development of the tracks for the transitions between patterns on 3D braiding machines with continuous rotating horn gears

Gleßner¹,

Kyosev

2021

Textile Research Journal

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The pattern changes on the 3D rotary braiding machines (maypole principle with horn gears with full and empty slots) require complex planning of the carrier positions and timing and allow for production of bifurcated and other complex braids with variable cross sections for medical and technical applications. Another common application of pattern changes is to make a visually different pattern for marking of the remaining length of rope when used in a climbing context or for generally lengthened pieces for medical sutures. The development of such samples has previously been done using the trial-and-error method. This paper presents one rule for supporting a more systematic and purposeful trial, which significantly speeds up the development process. After a short review of the related literature, the main theoretical background is given and two practical cases for pattern change are demonstrated. The patterns were developed using numerical simulation before being tested on a real braiding machine. With this paper the authors hope to give some motivation for the remaining braiders in the world to continue working on the development of systematic rules for this complex process.

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“…Ma et al 15 studied the segmented motion characteristics of the leveraged carrier and established the kinematics model and verified the motion law of each part of the carrier combined with the experiment. Du et al 16 optimized the horn gear radius under continuous braiding conditions using the carrier speed fluctuation rate and acceleration fluctuation rate as evaluation functions. Hu et al 17 analyzed that the carrier movement along the “∞” track is an important reason for yarn tension fluctuation and studied the influence of pulley wrap angle and bobbin rotation speed on braiding quality.…”

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of axial clearance between the carrier base and horn gear in radial braiding machines

Meng

Sun

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Radial braiding machines are widely used in the preparation of complex preforms of high-performance fibers. However, the structural characteristics of a radial braiding machine inevitably cause axial clearance between the carrier base and horn gear, which affects the running speed of braiding machines and the stability of carrier exchanges. It is easy to create disadvantages of yarn fuzzing and poor continuity of preformed fibers. In order to solve these problems, this study compares and analyzes the coplanar horn gears in the industry and designs a kind of noncoplanar horn gear. Through the study, it is found that the trajectory of a carrier on a horn gear is divided into the linear phase and circular phase, based on which the mathematical model of the axial clearance between the carrier base and horn gear is established. The variation curve of the clearance with the horn gear rotation angle is plotted by using MATLAB software. A simulation model of the axial clearance between the carrier base and horn gear is established by using ABAQUS software, and carrier bases with different clearances are made to run on the braiding machine. The reliability of the theoretical calculation is verified by combining simulation and experiment, and it is proved that the use of the noncoplanar horn gear in radial braiding machines can effectively reduce the clearance and reduce vibration and shock.

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Optimal design of the horn gear for rotary three-dimensional braiding machine

Cited by 5 publications

References 9 publications

Advancing life cycle sustainability of textiles through technological innovations

Advancing life cycle sustainability of textiles through technological innovations

Carrier delay-based method for development of the tracks for the transitions between patterns on 3D braiding machines with continuous rotating horn gears

Modeling and analysis of axial clearance between the carrier base and horn gear in radial braiding machines

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