Contents
Academic literature on the topic 'Large diameter circular knitting machine'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Large diameter circular knitting machine.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Large diameter circular knitting machine"
1
Abdessalem, Saber Ben, Youssef Ben Abdelkader, Sofiene Mokhtar, and Saber Elmarzougui. "Influence of Elastane Consumption on Plated Plain Knitted Fabric Characteristics." Journal of Engineered Fibers and Fabrics 4, no. 4 (2009): 155892500900400. http://dx.doi.org/10.1177/155892500900400411.
Full textAbstract:
The requirements in terms of wearing comfort with sportswear underwear and outerwear are widely linked to the use of elastane fibers. Today, elastomeric plated jersey fabric is one of the most common fabrics produced with large-diameter circular knitting machine (LCKM). However, the relation between elastane proportion and fabric characteristics has not been enough studied in literature and knitters generally use experience during machines adjustments in to order reach needed fabric characteristics. The aim of this paper was to investigate the relation between Lycra® consumption and fabric dimensional and elastic behavior. The obtained results showed that Lycra® proportion inside fabric has an incidence on fabric width, weight and elasticity. The origin of this behaviour has been discussed.
2
Abdessalem, Saber Ben, Salem Ben Mansour, and Helmi Khelif. "Influence of Delayed Timing on Knitted Fabric Characteristics." Journal of Engineered Fibers and Fabrics 7, no. 4 (2012): 155892501200700. http://dx.doi.org/10.1177/155892501200700401.
Full textAbstract:
Delayed timing is a complex adjustment of large-diameter circular knitting machine (LCKM). It corresponds to the delay between cylinder and dial needles knock-over. It is generally not well-known by machines users and its impact on fabric properties has not been enough studied in literature. Knitters generally use experience during delayed timing adjustment in order reach needed fabric characteristics. The aim of this paper was to investigate the relation between delayed timing intensity and yarn tension, yarn consumption, fabric weight as well as loop length and shape. The obtained results showed that delayed timing has an incidence on fabric weight and loop shape especially at fabric back side. The origin of this influence has been discussed and related to needles feeding mechanisms.
3
SHCHERBAN, Volodymyr, Oksana KOLISKO, Marjana KOLISKO, Anton KIRICHENKO, and Yuryj SHCHERBAN. "COMPUTER PROCEDURES OF THE SOFTWARE COMPLEX FOR DETERMINING THE TENSION OF THE THREAD SUPPLY PROCESS ON CIRCULAR KNITTING MACHINES." Herald of Khmelnytskyi National University 305, no. 1 (2022): 256–59. http://dx.doi.org/10.31891/2307-5732-2022-305-1-256-259.
Full textAbstract:
Determining the intensity of the thread feed process on a circular knitting machine for elastic weaves allows you to initially determine the technological loads that will occur during the interaction of the thread with the guides and working bodies depending on the type of raw material, curvature of guide surfaces, thread feed rate. The tension is changed due to the interaction of the threads with the guides of the circular knitting machine for elastic weaves of large and small curvature, tensioning devices. The development of procedures for the computer determination of thread tension on a circular knitting machine for elastic weaves should be based on the use of object-oriented programming languages. Determining the tension and changes in relative tension in the refueling zones of a circular knitting machine for elastic weaves, taking into account the specifics of the design of the thread feed system, will improve the technology of processing raw materials on a circular knitting machine for elastic weaves. The improvement of technological processes of thread processing on a circular knitting machine for elastic weaves should be based on complex studies of the process of interaction of threads with combined tensioning devices, working guide surfaces of large and small curvature of the feed system. Theoretical dependences for determining the tension will allow to obtain mathematical software used in computer software to calculate the tension and change the relative tension in the refueling zones of circular knitting machine for elastic weaves, reduce the percentage of thread breakage, improve the quality of knitted fabric. You can reduce the tension of the thread feeding process and reduce the number of thread breaks on a circular knitting machine for elastic weaves by using quality raw materials and optimizing the interaction of threads with tensioning devices on a circular knitting machine for elastic weaves, where there is interaction of threads with surfaces large and small curvature. Thread tension relationships are systems of transcendental equations that require numerical methods to solve.
4
Peiner, Christoph, Henning Löcken, Leon Reinsch, and Thomas Gries. "3D Knitted Preforms Using Large Circular Weft Knitting Machines." Applied Composite Materials 29, no. 1 (2021): 273–88. http://dx.doi.org/10.1007/s10443-021-09956-1.
Full textAbstract:
Abstract3D-knits are typically produced on flat knitting or special circular knitting machines in a time-consuming process. The utilisation of a sewing-like pattern opens up the potential of a 10–50 times faster production on common large circular knitting machines as compared to conventional flat knitting machines. Since common large circular knitting machines are not designed for this technology, the limitations and the stability of process conditions have been rarely studied. To further proof the feasibility and increase technological maturity, agile product development is conducted. As a concept product, a sports bra with customised cups is developed and demonstrated, which is knitted in a single step in approx. 5 min using the sewing-like pattern on a large circular knitting machine. The agile process is utilised to build process knowledge, develop a methodology for product design and to defined a descriptive process terminology. In order to further accelerate and digitize the production process, an algorithm is developed and implemented to convert CAD-data into machine readable knitting structures. The paper presents the basics of the 3D-Knit one large circular knitting machines and a defined terminology. Furthermore, process knowledge is built up and from this a sequence of development steps is derived. The development of a 3D-knitted sports bra is presented as a proof of concept of the technology. Further, the first steps for digitalising the product development process are given. The results open up application possibilities in sportswear, upholstery and aerospace with increased productivity and hence cost reduction.
5
Krauledaitė, Julija, Kristina Ancutienė, Virginijus Urbelis, Sigitas Krauledas, and Virginija Sacevičienė. "Development and evaluation of 3D knitted fabrics to protect against mechanical risk." Journal of Industrial Textiles 49, no. 3 (2018): 383–401. http://dx.doi.org/10.1177/1528083718783316.
Full textAbstract:
In this research, eight different 3D weft-knitted fabrics were developed and evaluated. 3D fabrics have been knitted on circular weft-knitting machines with two different gauges: 20E gauge and 28E gauge. Three different raw materials were used for the fabric’s production: high molecular mass polyethylene (HPPE) yarn and 0.05 mm diameter steel wire in the outer layers (for the front and reverse) and polyamide yarn in the binding layer. The experiments were conducted on the developed 3D knitted fabrics to determine the fabric’s resistance to mechanical risks such as circular blade cut, puncture, abrasion, and also to evaluate the comfort parameter, such as air permeability. It was defined that 3D weft-knitted fabrics best results on tests: circular blade cut, puncture and abrasion resistant were achieved using HPPE yarn twisted with steel wire, higher mass per unit area with more significant amount of steel wire. According to the standard EN 388:2003, three samples of developed 3D weft-knitted fabrics had the highest 5th blade cut and the highest (4th) abrasion resistance level. All of them had the highest (4th) level of puncture resistance. 3D fabrics knitted on a circular weft-knitting machine of gauge 28E ensured 1.3–2.1 times greater blade cut and 4.9–12.1 times greater abrasion resistance result, than fabrics knitted on gauge 20E, due to a higher stitch density, higher mass per unit area, density and fabric’s thickness. But on the other hand, these parameters lowered air permeability by 20.2–43.0%.
6
Soekoco, Asril, Ateeq Ur Rehman, Ajisetia Fauzi, et al. "Fabrication of Recycled Polycarbonate Fibre for Thermal Signature Reduction in Camouflage Textiles." Polymers 14, no. 10 (2022): 1972. http://dx.doi.org/10.3390/polym14101972.
Full textAbstract:
Thermal signature reduction in camouflage textiles is a vital requirement to protect soldiers from detection by thermal imaging equipment in low-light conditions. Thermal signature reduction can be achieved by decreasing the surface temperature of the subject by using a low thermally conductive material, such as polycarbonate, which contains bisphenol A. Polycarbonate is a hard type of plastic that generally ends up in dumps and landfills. Accordingly, there is a large amount of polycarbonate waste that needs to be managed to reduce its drawbacks to the environment. Polycarbonate waste has great potential to be used as a material for recycled fibre by the melt spinning method. In this research, polycarbonate roofing-sheet waste was extruded using a 2 mm diameter of spinnerette and a 14 mm barrel diameter in a 265 °C temperature process by using a lab-scale melt spinning machine at various plunger and take-up speeds. The fibres were then inserted into 1 × 1 rib-stitch knitted fabric made by Nm 15 polyacrylic commercial yarns, which were manufactured by a flat knitting machine. The results showed that applying recycled polycarbonate fibre as a fibre insertion in polyacrylate knitted fabric reduced the emitted infrared and thermal signature of the fabric.
7
Shen, Nan Yan, Jing Li, Xue Dong Wang, Jun Ye, and Zhi Xiang Yu. "Analysis and Detection of Elastic Deformation of the Large-Scale Crankshaft in Non-Circular Grinding." Applied Mechanics and Materials 532 (February 2014): 285–90. http://dx.doi.org/10.4028/www.scientific.net/amm.532.285.
Full textAbstract:
Due to the discontinuous axis and the big ratio of length to diameter, the large-scale crankshaft is easy to generate the complex elastic deformation under the effect of the huge gravity and the clamping force on non-circular grinding machine. The distinctive deformation deteriorates the coaxiality of all the main journals and thus the grinding precision of crankpins in non-circular grinding. In this paper, the statics analysis of large-scale crankshaft has been conducted by using the finite element simulation. The overall deformation of crankshaft and the position offset of each main journal center without or with the auxiliary supports have been simulated and contrasted. The results manifest that the auxiliary support forces produced by the steady rests have the positive effect on the compensation for crankshaft deformation. On this basis, to satisfy the demand of position adjustment of the upper and lower support pads of servo-controlled open steady rest, the on-machine measurement method and device of the position of main journal center is proposed. And then the offset calculation model of the main journal center is deduced using the measured data. The measurement method and device are beneficial for the straightening of the crankshaft and the improvement of machining accuracy of crankpins in non-circular grinding.
8
Dong, Xiang Min, Li Gang Cai, Yong Sheng Zhao, and Xiao Shi. "Deformation Analysis for Hydrostatic Rotary Table of Heavy Duty CNC Machine Tool." Applied Mechanics and Materials 457-458 (October 2013): 335–39. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.335.
Full textAbstract:
The deformation of constant flow and closed type hydrostatic rotary table of heavy duty CNC machine tool has a great influence on the film thickness because of its large diameter, high load-bearing. According to the circular plate deformation theory of elasticity, differential equations of worktable deformation are derived in the simply supported conditions when bearing uniform force of different locations. Displacement curves of worktable are obtained. Force and deformation weaknesses of hydrostatic rotary table are found, which can provide theory basis for supporting location of heavy workpiece machining and whether oil film is failure or not.
9
Pavlović, Željka, and Zlatko Vrljičak. "Comparing double jersey knitted fabrics made of Tencel and modal yarns, spun by different spinning methods." Journal of Engineered Fibers and Fabrics 15 (January 2020): 155892502091985. http://dx.doi.org/10.1177/1558925020919854.
Full textAbstract:
A double-bed circular knitting machine with a gauge of E17 and a needle bar diameter of 200 mm (8 in) was used to make three groups of plain weft knitted Tencel fabrics and three groups of modal knitted fabrics. The yarns were spun using three spinning methods: ring, rotor, and air-jet system. Their count was 20 tex. All the knitted fabric samples were manufactured under the same conditions. One-half of each knitted fabric sample remained unfinished, while the other half was finished. Structure parameters of all finished and unfinished knitted fabrics were analyzed, and the most significant parameters were compared. Tensile properties of the knitted fabrics in wale and course directions were measured. The difference in the elasticity of the knitted fabric was analyzed in particular, and the portions of knitted fabric stretch are given. The basic conclusion is that using equal yarn fineness, but different raw material composition and structure, the produced knitted fabrics had substantially different fabric masses per unit area. The raw material composition and construction of the yarn, that is, the yarn manufacturing process and the spinning process produce yarns of different structures and properties that are manifested in the structure and properties of the knitted fabric. Thus, the finishing process must be specific for each raw material composition and yarn structure.
10
Yagishita, H. "Experimental Research on Circular Milling of Bi-Layer Composite Materials Consisting of CFRP Laminates and Titanium Alloys." Key Engineering Materials 622-623 (September 2014): 1207–14. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.1207.
Full textAbstract:
Recently, to construct an airframe 2-layer composite materials consisting of carbon fiber reinforced plastic (CFRP) laminates and TiAl6V4 still need to be machined, whereby drill holes are frequently machined. Special attention has to be paid to the machining quality, which implies hole dimensional accuracy, defect free peripheral zone, edge quality at inlet and outlet of hole and so on. Machining defects often occur as a consequence of excessive mechanical and thermal loads, which are often caused by wrong process conditions or by the wrong choice of machining process itself. With respect to widely used state-of-the-art machine tools providing high performance and equipped with potent control unit, for the comparatively large drill hole, circular milling gains interest as an alternative to the drilling operation [1, 2]. In this research, in order to select suitable machining conditions for 2-layer composite materials consisting of CFRP laminates and TiAl6V4 a large number of circular milling tests of 6 mm diameter are executed by using a high performance vertical milling machine. Hole diameter deviation from 6 mm and inner surface roughness in relation to number of hole machined are measured and evaluated for CFRP laminates and TiAl6V4. Moreover, from observations of cutting edges in relation to number of hole machined it is confirmed that under wrong machining conditions the difference of heat conductivity between CFRP laminates and TiAl6V4 induces for chips of TiAl6V4 to be deposited on the end cutting edges of endmill used. In this case tool life shortens extremely.