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Journal articles on the topic 'Knitting machine design'
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1
Huang, Ji Ye, and Ming Yu Gao. "Flat Knitting Machine Design Based on Display Accelerator." Applied Mechanics and Materials 340 (July 2013): 8–12. http://dx.doi.org/10.4028/www.scientific.net/amm.340.8.
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In this paper, the application of a FPGA-based large-screen and high-resolution display accelerator technology in full-automatic textile machinery (computerized flat knitting machine) is studied. The design of traditional computerized knitting machine system is difficult to support the display of large screen and high resolution operating interface. Therefore, a displaying accelerator is designed in this paper. It comprises of FPGA, configuration chip, SDRAM and LVDS transmitter chip, is located between the embedded main processor and high resolution TFT LCD screen of computerized flat knitting machine, and implements the modules such as display acceleration logic and SDRAM controller relying on Verilog HDL programming in FPGA. The computerized flat knitting machine, applying displaying acceleration technology, can present its dynamic color interface on an 800 x 600 resolution TFT LCD (10.4") on the condition that real time, reliability and cost can be ensured.
2
Zhang, Chi, Xiao Guang Wu, and Cheng Jun Zhang. "Control Data Preparation of Computerize Flat Knitting Machine." Advanced Materials Research 627 (December 2012): 422–27. http://dx.doi.org/10.4028/www.scientific.net/amr.627.422.
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In order to realize the conversion from computer flat knitting machine design pattern to control data, a kind of control data preparation method in development of computerize flat knitting machine is introduced by this paper. This method has five parts, including of PAT data, CNT data, SYS data, KSD data, and FKD data. This paper illustrates the function of all the data documents and data definition, and give the FKD data conversion algorithm. Most existing pattern of design software flat knitting machine process files can be compatible by this method. FKD data conversion algorithm has small burden of data to control system. FKD data transmission is compact and can be quickly applied in all kinds of master-slave type of computer knitting machine control system. This design has applied to computerize flat knitting machine controller with stability of processing data and excellent performance.
3
Hu, Guo Jun, Fang Feng, and Wei Qiang Zhao. "Design of Control Circuit for Needle-Selected Mechanism of Knitting Machines." Advanced Materials Research 328-330 (September 2011): 2257–60. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.2257.
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The needle-selected technology is one of the key one for the control system of knitting machine. Based on the analysis of the structure and principle for the needle-selected mechanism, the drive circuits of the needle-selected device are designed to ensure the stability when knitting machines run. Additionally, this paper presents the discussion of the software design for needle -selected technology, which provides a theoretical reference for the research and development of the control system.
4
Liu, Zhi Hui, Sheng Ze Wang, Qiong Shen, and Jia Jun Feng. "Eye Movements as a Means to Evaluate Operation Interface of Flat Knitting Machine." Applied Mechanics and Materials 607 (July 2014): 664–68. http://dx.doi.org/10.4028/www.scientific.net/amm.607.664.
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This study investigates the characteristics of eye movements by operating flat knitting machine. For the objective evaluation purpose of the flat knitting machine operation interface, we arrange participants finish operation tasks on the interface, then use eye tracker to analyze and evaluate the layout design. Through testing of the different layout designs, we get fixation sequences, the count of fixation, heat maps, and fixation length. The results showed that the layout design could significantly affect the eye-movement, especially the fixation sequences and the heat maps, the count of fixation and fixation length are always impacted by operation tasks. Overall, data obtained from eye movements can not only be used to evaluate the operation interface, but also significantly enhance the layout design of the flat knitting machine.
5
Zhang, Li, Ting You Wang, and Hong Bin Liu. "Design for New Type Tobacco Sewing Machine Head." Applied Mechanics and Materials 687-691 (November 2014): 300–303. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.300.
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In order to reducing the worker's labor intensity in tobacco sewing, a new machine adoption with single thread sewing technology was developed. Through analyzing the existing problems in sewing machine and the tobacco damage situation, using drawing method, analytic method and other methods, the shape of the sewing component, hook line components and other mating parts were designed. The results show that the machine has the advantages of simple structure, controllable sewing speed, adjustable leaf thickness and quantity. And the tobacco leaf damage rate is low. The comprehensive efficiency in tobacco leaf knitting with this machine is four times higher than that with hand knitting. Its application prospect is considerable.
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Hu, Guo Jun, Han Qi, and Wei Qiang Zhao. "Design of Adjustment Devices of the Weaving Density for Computerized Knitting Machines." Advanced Materials Research 201-203 (February 2011): 606–9. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.606.
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The working principle of the adjustment device of the weaving density for the knitting machine is briefly introduced. Compared to the limitation from the adjustment device of the hand-cranked knitting machine, this paper presents another design method that the device is automatically controlled by the stepping motor to change the weaving density.
7
Cong, Honglian, Hui Lei, Yongchao Zhang, Aijun Zhang, and Pibo Ma. "Weft-knitted lace fabric simulation based on the spring-mass model." International Journal of Clothing Science and Technology 29, no. 1 (March 6, 2017): 60–68. http://dx.doi.org/10.1108/ijcst-10-2015-0118.
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Purpose The obtained simulation structures could reflect the appearances and the features of the fabrics. The purpose of this paper is to promote a lot for design and manufacturing of weft-knitted lace fabrics (WKLF). Design/methodology/approach The advantages of WKLF compared with warp-knitted ones were displayed. The formation mechanism of the WKLF was analyzed with employing the mechanics principles. Spring-mass model was proposed in this paper to achieve the simulation of the fabrics. End mass points and intermediate mass points were involved in the model. The displacement of end mass points was considered the dominance and the foundation to settle the positions of all the mass points. Findings A novel jacquard lace style fabric with pattern-background effect knitted on circular knitting machine were put forward, which were different from the traditional lace fabrics manufactured on the warp knitting machines. Originality/value First, as the manufacturing equipment, circular knitting machine costs much less than warp knitting machine; second, the elastic performance along weft direction of WKLF is more excellent than that of warp-knitted ones. Third, the excellent extensibility gives nice comfort; furthermore, long floating threads do not exist on the WKLF surface, so that the snag will be avoided.
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Elmoughni, Hend M., Ayse Feyza Yilmaz, Kadir Ozlem, Fidan Khalilbayli, Leonardo Cappello, Asli Tuncay Atalay, Gökhan Ince, and Ozgur Atalay. "Machine-Knitted Seamless Pneumatic Actuators for Soft Robotics: Design, Fabrication, and Characterization." Actuators 10, no. 5 (April 30, 2021): 94. http://dx.doi.org/10.3390/act10050094.
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Computerized machine knitting offers an attractive fabrication technology for incorporating wearable assistive devices into garments. In this work, we utilized, for the first time, whole-garment knitting techniques to manufacture a seamless fully knitted pneumatic bending actuator, which represents an advancement to existing cut-and-sew manufacturing techniques. Various machine knitting parameters were investigated to create anisotropic actuator structures, which exhibited a range of bending and extension motions when pressurized with air. The functionality of the actuator was demonstrated through integration into an assistive glove for hand grip action. The achieved curvature range when pressurizing the actuators up to 150 kPa was sufficient to grasp objects down to 3 cm in diameter and up to 125 g in weight. This manufacturing technique is rapid and scalable, paving the way for mass-production of customizable soft robotics wearables.
9
Fang, Yuan, Jian Bang Liu, Guo Qing Wang, and Fan Tian Xia. "Modeling and Simulation of Computerized Glove Machine’s Knitting Element Based on SolidWorks." Advanced Materials Research 945-949 (June 2014): 66–72. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.66.
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The mechanical design of computerized glove machine was traditional. It was not only lack of theoretical analysis of key institutions, but running stability needed to be improved. We analyzed the impact of the needle and cams which was based on the computerized glove machine’s knitting theory and key process points. On the basis of SolidWorks, 3-D model of computerized glove machine’s knitting element was created; We imported the 3-D model to ANSYS/LS-DYNA system and realized the motion simulation of needle and cams. As a result, we got the curves of needle’s displacement, velocity and acceleration. According to the simulation parameters of needle’s movement, the knitting element was optimized design. The result reveals that acceleration reaches a maximum of 0.63×105m/s2 when knitting time is 0.052ms. It reduces nearly 16% compare to the result before design optimization of knitting element. The smooth of computerized glove machine is being improved significantly.
10
Peng, Jiajia, Gaoming Jiang, Honglian Cong, Xuan Luo, and Yan Zhao. "Development of whole garment formed on four-bed computerized flat knitting machine." International Journal of Clothing Science and Technology 30, no. 3 (June 4, 2018): 320–31. http://dx.doi.org/10.1108/ijcst-07-2017-0105.
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Purpose The whole garment technology offers a solution for the production efficiency by directly knitting a seamless tubular garment. Due to its complexity, high requirements and few references, the technology has not been widely applied in mass production. Therefore, the purpose of this paper is to show garment technology’s detailed design method, the technique calculation process and its merits compared than common technology. Design/methodology/approach This paper first analyzes the knitting principle of the four-bed computerized flat knitting machine from its configuration. After that, the design method is putted forward as well as the technique calculation process. To reveal the advantages of the whole garment technology, this paper builds a comprehensive evaluation system by comparing the knitting time, labor cost and the yarn consumption. Findings With the evaluation system, the whole garment technology is proved to be more productive, cost-saving and less materials-consuming. Moreover, this advantage stands more out when the machine gage is higher. Research limitations/implications Due to limited research time and references, this paper only presents the whole garment technology for knitting common and traditional styles. More complicated and fashioned garments can be studied in the future research. Practical implications The design method and technology presented in this paper can be used as a reference for both the designers in the manufacture industry and the scholars for academic research works. Originality/value This paper has presented the whole garment technology and a specific method for technique calculation with consideration of garment structures. It also builds a evaluation system to show the advantages in terms of knitting efficiency, labor cost and yarn consumption.
11
Huang, Ji Ye, Ming Yu Gao, and Heng Cai. "Application of FPGA-Based Large-Screen and High-Resolution Display Accelerator in Computerized Flat Knitting Machine." Applied Mechanics and Materials 192 (July 2012): 318–22. http://dx.doi.org/10.4028/www.scientific.net/amm.192.318.
Full textAbstract:
In this paper, the application of a FPGA-based large-screen and high-resolution display accelerator technology in full-automatic textile machinery (computerized flat knitting machine) is studied. The design of traditional computerized knitting machine system is difficult to support the display of large screen and high resolution operating interface. Therefore, a displaying accelerator is designed in this paper. It comprises of FPGA, configuration chip, SDRAM and LVDS transmitter chip, is located between the embedded main processor and high resolution TFT LCD screen of computerized flat knitting machine, and implements the modules such as display acceleration logic and SDRAM controller relying on Verilog HDL programming in FPGA. The computerized flat knitting machine, applying displaying acceleration technology, can present its dynamic color interface on an 800 x 600 resolution TFT LCD (10.4") on the condition that real time, reliability and cost can be ensured.
12
Shi, Guo Fang, and Sen Lin Zhang. "Design of Pattern Preparation System of Computerized Flat Knitting Machine Based on Delphi." Advanced Materials Research 332-334 (September 2011): 1395–99. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1395.
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A design method and primary functions of pattern preparation system of computerized flat knitting machine are introduced. The system provides a formidable mapping system based on object-oriented and multi-document, so pattern becomes simple and flexible to be edited and displayed. In addition, the compiler has a novel method of compiling pattern data. Two pattern description files (PAT and CNT) are generated after compiled, which include all control information that computerized flat knitting machine needs. The system also provides a direct and friendly interface, through which user can accomplish pattern design quickly and conveniently.
13
Fang, Yuan, and Fan Tian Xia. "Dynamic Research of Knitting Element for Computerized Flat Knitting Machine Based on ANSYS/LS-DYNA." Advanced Materials Research 472-475 (February 2012): 488–93. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.488.
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Based on research on the knitting processes, an impact mechanic model for knitting elements was established to investigate the variation of the impact force in vertical direction between the cam and the select jack. The variation of the displacement, velocity, acceleration of the select jack and the stability for the needles’ moving has been confirmed by the simulation of knitting process based on the software ANSYS/LS-DYNA. Furthermore, the variation of the select jack has been confirmed by experimental measurement during the knitting process. The data of the experiment results were in accordance with the ANSYS’ simulation which verified the correctness of the ANSYS’ analysis. It provided a theoretic basis for the design of computerized flat knitting machines.
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Lv, W. G., J. Bai, and Ce Zhang. "Design of Carpet-Knitting Machine Control System Based on Embedded System." Applied Mechanics and Materials 743 (March 2015): 239–43. http://dx.doi.org/10.4028/www.scientific.net/amm.743.239.
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Electronic jacquard machine is the main knitting equipment now, and its control system is the device’s core component that can influence working performance. This paper introduces design and implementation of the Electronic Jacquard Control System for the warp woof knitting machine, and it is a high performance and scalable control system. The hardware of control system is designed with modular hierarchical method. The system contains hardware buffer and ensure reliable operation in real time, can continue weaving after outages, while, with sufficient flexibility and maintainability, can be adapted to different needs of different grades of carpet jacquard equipment. Control system supports a variety of pattern data input, providing flower pattern compilation features real-time visualization of dynamic control of the weaving process to improve the efficiency of the weaving machine. Control system based on general hardware and software platform: ARM9 and Embedded Linux operating system.
15
Zeng, Qing Liang, Zai Chao Wu, Juan Lu, and Bin Zhang. "Optimal Design of the Rubber Chain Attached Board Used in Steel Wire Knitting Machine Based on ANSYS Workbench." Applied Mechanics and Materials 215-216 (November 2012): 89–94. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.89.
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The role, principle and characteristics of the rubber chain attached board used in steel wire knitting machine were analyzed in this paper. A new kind of attached board with reasonable structure was designed through comparison of several design schemes. Eventually, through finite element analysis and size optimization design based on Workbench, the structure size of attached board was optimized and the whole strain, the maximum equivalent stress and the minimum safety factor were calculated. At the same time, new design ideas are also provided for the development of steel wire knitting machine to save materials and reduce cost.
16
Song, Xiao Lei, Bing Ying Cheng, Li Wei, and Pei Pei Yue. "Knitting Crafts and Products Design of the Double-Faced Jacquard Stitch." Advanced Materials Research 450-451 (January 2012): 462–65. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.462.
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Jacquard stitch is widely used in clothing and many other areas in recent years. The paper describes the structural features, classification and knitting crafts of the jacquard stitch. Particularly are the knitting process and the locus of needles on the needle bar. However, newly design by the fancy appearance formation regularity is the emphasis of this paper. The design principle is according to the arrangement of color yarns and the drafting of new stitches. Cotton and polyester blended yarns are taken as the raw materials with several colors. Finally, a style of the double-faced jacquard stitch of the complementary yarns and a style of the sesame points are finished on the double-needle bar by the flat knitting machine.
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Березін, Л. М. "ЕКСПРЕС-АНАЛІЗ ВПЛИВУ ІННОВАЦІЙНИХ РІШЕНЬ МЕХАНІЗМІВ НА НАДІЙНІСТЬ ШКАРПЕТКОВИХ АВТОМАТІВ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 146, no. 3 (January 11, 2021): 48–57. http://dx.doi.org/10.30857/1813-6796.2020.3.4.
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Purpose: development of a methodology for operational assessment of the influence of innovative solutions to the technical and operational characteristics of individual mechanisms and systems on the reliability of the sock automatic machine on a posteriori information about failures in production.Methodology: the method of search, description, analogies and analysis of information is used to audit the set of possible solutions to the subject of research, the basics of reliability theory, methods for assessing reliability indicators based on experimental data, matrix theory, elements of numerical methods and methodology of a posteriori reliability analysis of structurally complex technical systems. Findings: the calculation algorithm and mathematical support for operational assessment of influence of technical and operational changes of one of mechanisms on reliability of the sock automatic machine as a whole in the conditions of uncertainty of the information about failures and sources of its receipt are presented. The advantages of the proposed approach in comparison with the traditional one are shown, which allows to reduce the design duration while ensuring the required quality and minimizing costs by limiting tests and calculations. A numerical estimate of the degree of influence on the reliability of the sock automatic machine of changes in the design of the knitting mechanism is obtained. It is shown that the increase in the average failure time to 24.82 hours, when changing the technical characteristics of the knitting mechanism leads to an increase in this indicator for the machine as a whole to 1.24 hours. Originality: it is the further development of the theory and methodology of reliability analysis of sock automatic machines at the stages of design or modernization in cases of controlled variety of options for innovative mechanisms with limited information about failures and while maintaining functional and structural relationships. Practical value: the method of modeling the reliability of the sock automatic machine according to the innovative solutions of its mechanisms is proposed, which minimizes the costs of additional tests and calculations. The results of the above concept of the analysis of the reliability of the machine confirmed the sufficient accuracy of the calculations at the stage before the design preparation, which allows it to be used for other knitting machines.
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Березін, Л. М. "ЕКСПРЕС-АНАЛІЗ ВПЛИВУ ІННОВАЦІЙНИХ РІШЕНЬ МЕХАНІЗМІВ НА НАДІЙНІСТЬ ШКАРПЕТКОВИХ АВТОМАТІВ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 146, no. 3 (January 11, 2021): 48–57. http://dx.doi.org/10.30857/1813-6796.2020.3.4.
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Purpose: development of a methodology for operational assessment of the influence of innovative solutions to the technical and operational characteristics of individual mechanisms and systems on the reliability of the sock automatic machine on a posteriori information about failures in production.Methodology: the method of search, description, analogies and analysis of information is used to audit the set of possible solutions to the subject of research, the basics of reliability theory, methods for assessing reliability indicators based on experimental data, matrix theory, elements of numerical methods and methodology of a posteriori reliability analysis of structurally complex technical systems. Findings: the calculation algorithm and mathematical support for operational assessment of influence of technical and operational changes of one of mechanisms on reliability of the sock automatic machine as a whole in the conditions of uncertainty of the information about failures and sources of its receipt are presented. The advantages of the proposed approach in comparison with the traditional one are shown, which allows to reduce the design duration while ensuring the required quality and minimizing costs by limiting tests and calculations. A numerical estimate of the degree of influence on the reliability of the sock automatic machine of changes in the design of the knitting mechanism is obtained. It is shown that the increase in the average failure time to 24.82 hours, when changing the technical characteristics of the knitting mechanism leads to an increase in this indicator for the machine as a whole to 1.24 hours. Originality: it is the further development of the theory and methodology of reliability analysis of sock automatic machines at the stages of design or modernization in cases of controlled variety of options for innovative mechanisms with limited information about failures and while maintaining functional and structural relationships. Practical value: the method of modeling the reliability of the sock automatic machine according to the innovative solutions of its mechanisms is proposed, which minimizes the costs of additional tests and calculations. The results of the above concept of the analysis of the reliability of the machine confirmed the sufficient accuracy of the calculations at the stage before the design preparation, which allows it to be used for other knitting machines.
19
Luo, Xuan, Gaoming Jiang, and Honglian Cong. "A prediction method of material consumption for flat-knitted sweaters." International Journal of Clothing Science and Technology 29, no. 5 (September 4, 2017): 661–72. http://dx.doi.org/10.1108/ijcst-06-2016-0065.
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Purpose A method for predicting the material consumption of a sweater is presented before it is knitted. It can be achieved with the five basic models combined with the parameters related to the dimensions of the knitting machine and needles. The paper aims to discuss these issues. Design/methodology/approach Based on the parameters of the needle bar flat knitting machine, the sweater is modeled with five basic structures. The mathematical expression of each basic structure can be derived with corresponding parameters under some consumptions. In following, the predictive weight of the sweater can be formulated with the expression of the length of the basic structures and the linear density of the yarn. Findings To evaluate the performance of the proposed scheme, experiments of three types of sweaters on four different knitting machines are carried out. The results show that the proposed method can achieve the performance with the bias values by percentage ranging from −1.54 to −2.84 percent. Research limitations/implications Due to the present limited research, more experiments could not be carried out. To improve the performance and robustness of the proposed method, statistical performance measures such as the statistical mean and variance in massive experiments will be studied in the further research. Practical implications The evaluation of the material consumption can be obtained before it is knitted with the known basic parameters related to the machine and yarn. Originality/value This paper derives the general expressions of five basic structures based on the corresponding parameters of knitting machine. The predictive weight of the sweater is expressed according to the above basic structures before the sweater is knitted.
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Єліна, T. В., Т. А. Дзикович, Л. Є. Галавська, and Т. М. Дмитренко. "РОЗРОБКА ЖІНОЧИХ ПАНЧІХ З ЖАКАРДОВИМ ВІЗЕРУНКОМ." Fashion Industry, no. 4 (February 23, 2021): 26–31. http://dx.doi.org/10.30857/2706-5898.2020.4.1.
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Development of a model of warm and stylish women's stockings with a jacquard pattern, suitable for mass production. Methodology. To achieve this goal, a review of patent and technical іnformation on the manufacture of hosiery with jacquard patterns was realized. Autodesk AutoCAD software is used to increase the effi ciency of product design. Findings. The study developed a collection of women's stockings with animal ornaments and patterns for making the same. A pattern simulating the color of a zebra's fur was chosen for experimental production.A two-color double bed jacquard stockings collection is designed. The production of this knit does not involve the knitting density changes. Correspondence of the stocking surface geometry to the measurements of a person’s leg can be provided by increasing or decreasing working needles. The latter cannot be realized on specialized circular knitting equipment for hosiery production. The models of the collection can be made on fl at knitting machines accord ing to the patterns. An experimental model is made of half-woolen yarn on a semi-industrial fl at knitting machine Brother KH-965i. The linker Hague D280E has been used for the stocking’s parts sewing. A parametric pattern of the unfolded product in Autodesk AutoCAD has been created. To adjust the pattern to the desired size, a customer has to enter the measurements and the boundary will be redrawn automatically. An application in the Autolisp programming language has been developed to automatically calculate the knitting program (increase and decrease the number of working needles). Entering course and wale spacing values of the sample structure in the program allows the automatically calculating the required number of working needles in each part of the product.Practical value. The technology of making women’s hosiery with design patterns on the basis of double jacquard knits on fl at-bed knitting machines has been develope d. Such products can be made both on modern fl at knitting machines with computer control, such as, for example, automated equipment of the Stoll or Shima Seiki brands and on semi-industrial knitting machines, such as Brother, Selver Red and others.
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Melnyk, Liudmyla, Olena Kyzymchuk, and Liudmyla Zubkova. "Ukrainian Folk Ornaments in Modern Knitting." TEKSTILEC 64, no. 2 (March 27, 2021): 84–95. http://dx.doi.org/10.14502/tekstilec2021.64.84-95.
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National arts and crafts are not only the skills of an individual nation but an ethnic phenomenon that has unique features and serves as a source of information on national history and culture. Decorative and applied art in Ukraine combines the traditions and techniques of manufacturing and decoration, which have been developed and passed down from generation to generation. It has a clear national identity and numerous regional differ¬ences in ornamental motifs, compositions and favourite colours. Therefore, the Ukrainian folk art has a significant potential and is a source of ideas in creating modern clothing as well as interior items. Embroidery as a way of creating ornamental motifs on a textile material using various techniques is a common process for decorating clothes and interiors for the Ukrainians. Today, ornamental compositions of embroidered folk textiles could be transmitted into modern clothes using various technologies. However, the use of a knitting machine allows creating a pattern during the item production. The ornament transformation into a pattern for knitting can be carried out with graphic software by creating a grid with a cell size similar to the loop size of a knitted structure for corresponding interlooping. A number of clothing and interior items with ethnic motifs was created using the capabilities of flat knitting machines within the masters programme “Knitting Technology and Design” at the Textile Technology and Design Department of the Kyiv National University of Technologies and Design.
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Fan, You Hong, Ji Hong Xu, Xiao Dou Liang, and Xiao Hui Li. "Design of Ottoman Stitch in Knit CAD for Computer Flat Machine." Advanced Materials Research 821-822 (September 2013): 694–97. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.694.
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This paper introduces the definition of ottoman stitch in details, provides some fabric panels of ottoman and describes the appearance of fabric structure. In addition, the knitting method and technology design for whole-ottoman and part-ottoman in Knit CAD are introduced and analyzed respectively. Finally, some typical examples for application of ottoman on sweater design are enumerated, which can enlarge and enrich the fields of sweater design.
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Дворжак, В. М. "ЗАСТОСУВАННЯ МЕХАНІЗМУ ЧЕТВЕРТОГО КЛАСУ ДЛЯ ПРИВОДУ ВУШКОВИХ ГОЛОК ОСНОВОВ’ЯЗАЛЬНОЇ МАШИНИ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 146, no. 3 (January 11, 2021): 15–24. http://dx.doi.org/10.30857/1813-6796.2020.3.1.
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Development and research of functionally-adequate target mechanisms of technological machines of light industry with application of applied CAE-programs. Used the apparatus of vector algebra; analytical and numerical methods for determining the position functions of planar mechanisms containing a structural group of the fourth class of the second order, based on the vector transformation of coordinates; random search method for metric synthesis of flat mechanisms; methods of computer visualization and animation of kinematic schemes of flat mechanisms of higher classes. Mathematical models describing the position functions of the mechanism of eyelets of a warp knitting machine containing a structural group of the fourth class of the second order with rotating kinematic pairs in the form of angles of moving links, free vectors constructed on these links and radius vectors of characteristic points of the mechanism as a function of the angle of rotation of the master crank. The geometrical parameters of the flat six-link mechanism of eyelets for the warp knitting machine containing the structural group of the fourth class of the second order with rotating kinematic pairs as a result of metric synthesis of the mechanism by random search in CAE-program are determined; computer circuit modeling of the obtained mechanism is performed; graphs of visualization and animation of the kinematic scheme of the received mechanism are constructed; identification of the kinematic scheme of the obtained mechanism for compliance with the accepted structure; the received graph of function of position of an auricular needle of the mechanism of the fourth class; the functions of the position of the eye needle of the new mechanism and the mechanism of the basic knitting machine OV-7 are compared. The structure of a flat six-link mechanism, containing structural groups of the fourth class of the second order with rotating kinematic pairs, is proposed for use as a drive in a warp knitting machine on the example of the mechanism of oscillating movement of eyelets. The geometric dimensions of the moving parts of the functionally adequate mechanism of the fourth class for the drive of the eye needles of the basic knitting machine are determined. Software blocks for automated computer metric synthesis and calculation of link angles and radius vectors of characteristic points of the mechanism in the CAE program have been created. Practical Value is to use the results for the design and construction of flat mechanisms of the fourth class with rotating kinematic pairs of warp knitting machines, in which the working bodies make stops during the work process.
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Дворжак, В. М. "ЗАСТОСУВАННЯ МЕХАНІЗМУ ЧЕТВЕРТОГО КЛАСУ ДЛЯ ПРИВОДУ ВУШКОВИХ ГОЛОК ОСНОВОВ’ЯЗАЛЬНОЇ МАШИНИ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 146, no. 3 (January 11, 2021): 15–24. http://dx.doi.org/10.30857/1813-6796.2020.3.1.
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Development and research of functionally-adequate target mechanisms of technological machines of light industry with application of applied CAE-programs. Used the apparatus of vector algebra; analytical and numerical methods for determining the position functions of planar mechanisms containing a structural group of the fourth class of the second order, based on the vector transformation of coordinates; random search method for metric synthesis of flat mechanisms; methods of computer visualization and animation of kinematic schemes of flat mechanisms of higher classes. Mathematical models describing the position functions of the mechanism of eyelets of a warp knitting machine containing a structural group of the fourth class of the second order with rotating kinematic pairs in the form of angles of moving links, free vectors constructed on these links and radius vectors of characteristic points of the mechanism as a function of the angle of rotation of the master crank. The geometrical parameters of the flat six-link mechanism of eyelets for the warp knitting machine containing the structural group of the fourth class of the second order with rotating kinematic pairs as a result of metric synthesis of the mechanism by random search in CAE-program are determined; computer circuit modeling of the obtained mechanism is performed; graphs of visualization and animation of the kinematic scheme of the received mechanism are constructed; identification of the kinematic scheme of the obtained mechanism for compliance with the accepted structure; the received graph of function of position of an auricular needle of the mechanism of the fourth class; the functions of the position of the eye needle of the new mechanism and the mechanism of the basic knitting machine OV-7 are compared. The structure of a flat six-link mechanism, containing structural groups of the fourth class of the second order with rotating kinematic pairs, is proposed for use as a drive in a warp knitting machine on the example of the mechanism of oscillating movement of eyelets. The geometric dimensions of the moving parts of the functionally adequate mechanism of the fourth class for the drive of the eye needles of the basic knitting machine are determined. Software blocks for automated computer metric synthesis and calculation of link angles and radius vectors of characteristic points of the mechanism in the CAE program have been created. Practical Value is to use the results for the design and construction of flat mechanisms of the fourth class with rotating kinematic pairs of warp knitting machines, in which the working bodies make stops during the work process.
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Xia, Wen, Wen Ren, and Sencai Lai. "New Design of a Boost Drive Circuit with an Energy Recovery Function for the Piezoelectric Jacquard Needle." Fibres and Textiles in Eastern Europe 29, no. 1(145) (February 28, 2021): 86–91. http://dx.doi.org/10.5604/01.3001.0014.5051.
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Aiming at the technical bottlenecks existing in the current warp knitting machine control system such as jacquard drive circuit, the design method of self-boosting power supply circuit integrated with jacquard driver is proposed for the embedded warp knitting machine jacquard control system for miniaturization design. The voltage boost circuit designed can boost the low voltage from the input of the working power supply to the high voltage for the output to drive the oscillation of the piezoelectric ceramic jacquard needles. Since the circuit adopts energy storage inductance instead of current-limiting resistor to optimize the driving circuit, it not only limits the forward charging current of the piezoelectric ceramic, but also effectively realize the energy recovery function. The effectiveness of the design method is verified by simulation.
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Qiu, Yu Ying. "The Effect of Tucking Courses' Number on Performance of Knitted Fabric." Advanced Materials Research 627 (December 2012): 353–56. http://dx.doi.org/10.4028/www.scientific.net/amr.627.353.
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In this paper, four types of single needle tuck stitches which have different tuck courses are designed and programmed through M1PLUS software. Using the blended yarns of apocynum fiber and cotton fiber (10/90), these tuck stitched are knitted by STOLL computer flat knitting machine. Through testing, comparing and analyzing on dimension property, thickness, air permeability and drape, the change regulation of tuck structures is grasped so as to guide the design of the knitting fabric.
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Effendi, Riki, Fadwah Maghfurah, and Rudiarto Rudiarto. "Optimization Design of Multifunction Machines For Making 2 Kinds of Animal Feed." Journal of Energy, Mechanical, Material and Manufacturing Engineering 3, no. 2 (December 31, 2018): 99. http://dx.doi.org/10.22219/jemmme.v3i2.7011.
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Optimization design of multifunctional machines for making of animal feed is one of the development efforts of conventional machinery to be a multifunctional machine with electric motor drive which is to help small MSME industries so that their results and capacity are faster and more effective during the process of milling and grinding. This is a new concept designed to increase the time effectiveness of its use. This tool is specifically designed to chop odot grass and grind corn kernels, where the tool works using resources from an electric motor that moves a U-type blade or type I blade for knitting or grinding. The method used to make multifunction machines includes the development of existing models, seeking research on previous tools, refining the design model concept, making 3D models using the Solidworks Computer Aided Design (CAD) with a cycle time of 50 seconds on different test pieces and mills where assembly time is needed to complete the multifunction machine for ± 20 days or 28800 minutes.
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Kang, Li. "Hand Flat Knitting Machine Speech Counter System Design - Based on Single-Chip Microcomputer." Advanced Materials Research 383-390 (November 2011): 4227–34. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.4227.
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This paper designed a set of counter system to hand flat knitting machine based on single-chip microcomputer, for the inconvenient of counter of traditional ones. It used a shading photoelectric switch sensor converted the output of the sensor into standard electrical signal of single-chip microcomputer with converter, then dealed with single-chip microcomputer, and the count value was output by speech at the end . The hardware simulation results show that the design is practical, achieving the schemed requirements.
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Zheng, Baoping, Gaoming Jiang, Zhijia Dong, and Haisang Liu. "Design of warp knitting electronic shogging system based on mixed-velocity planning curve." Textile Research Journal 91, no. 13-14 (January 21, 2021): 1594–608. http://dx.doi.org/10.1177/0040517520982583.
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To realize high-speed running of a warp knitting machine, the shogging motion should not only meet the requirement of high dynamic response but should also satisfy high positioning accuracy. Due to the large location disturbance and the dynamic response delay in the interpolation method or the single velocity planning curve method, an electronic shogging system for a warp knitting machine based on the mixed-velocity planning curve is proposed in the present study. Through the analysis of the shogging motion combined with the knitted structure, the optimal resolution of the instruction signal is calculated, which is 725 pulses for one needle step, and the velocity loop bandwidth of the servo driver is optimized. In addition, the motor with a load inertia ratio close to 1 is also selected. Analysis of the shogging motion vibration curve confirms that the shogging motion has advantages of high positioning accuracy and high dynamic response under the mixed-velocity planning curve. The response performance with the mixed curve is 12.5% higher than that with the quintic polynomial, and the positioning accuracy of the mixed curve is 26% higher than that with uniform acceleration–deceleration curve.
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Qin, Zhi Gang, and Xiao Hong Ma. "Investigation on Tensile Properties of Weft Insertion Warp Knitted Fabric Reinforced Composites." Advanced Materials Research 821-822 (September 2013): 1200–1203. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.1200.
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Warp knitted fabrics possess a number of changes in the structures, so they do have great advantages on the property design of composites. The three kinds of weft insertion warp knitted fabrics are knitted on a Raschel latch needle warp knitting machine with glass continuous-filament yarns. The warp knitted fabric/ unsaturated polyester resin composite laminates are produced by manual molding technology. The tensile properties of composites in the course, wale and diagonal directions are tested on the universal material testing machine. The results show that the tensile stress/strain curves of the composites were nonlinear. The tensile properties of the composites possess obvious anisotropic characteristics. The tensile strengths and elastic modulus of the warp knitting composites depend on the needle space number of inlaid yarn, fabric density and structure.
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Zhang, J. G., X. G. Wu, C. Zhang, and C. J. Zhang. "CPLD Application in the Development of the Pin Selection Controller in Knitting Machine." Key Engineering Materials 392-394 (October 2008): 913–18. http://dx.doi.org/10.4028/www.scientific.net/kem.392-394.913.
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By the help of professional CPLD software/hardware development tools like PLD carrier and MAXPLUS, this paper successfully put forward the objective device—Electrical Pin Selection Controller in Circular Weft Knitting Machine, which covers the primary aspects of expected inputs, electrical simulation and verification, programming and downloading, etc. Details have been given on how to apply CPLD in the pin selection controller design. Moreover, introductions have been given to the pin selection mechanism and the design schema.
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Wang, Liang, Xi Wei Wang, and Xi Jing Wang. "Research on High-Pressure Hose Knitting Machine Knowledge Modeling Based on Ontology." Advanced Materials Research 482-484 (February 2012): 2535–38. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.2535.
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In view of knowledge management problems for the manufacturing industries , this paper presents an approach of knowledge organization and management based on ontology. Knowledge model of high-pressure hose knitting machine is completed by the use of ontology modularization technology and ontology integration technology.It achieves a greater range of knowledge sharing and reusing ,provides a technical support for the enterprise to speed up product design , and has a certain significance on knowledge accumulations and innovations of manufacturers.
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Zhao, Cang, Guang Li Song, and Lei Xu. "Optimal Design of Computerized Flat Knitting Machine Cam Curves Based on UG and ANSYS/LS-DYNA." Applied Mechanics and Materials 529 (June 2014): 410–14. http://dx.doi.org/10.4028/www.scientific.net/amm.529.410.
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By combining the industrial design software UG and finite element dynamic analysis software ANSYS/LS-DYNA, the paper respectively designs the non-linear knitting cams with polynomial curves, and simulates the loop-forming process in the interaction between the cams and needles. Based on comparative analyses, it’s thereby concluded that the polynomial curve has the best performance and is significantly superior to the cam curve composed of straight-lines and circular-arcs; the elements with higher stresses are located above the butt of needle jack and the joint of the jack and latch needle; and the polynomial curve is effective in lowering the maximum stress of the needle.
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Sagström, Elisabeth, Nils Krister Persson, and Åsa Lundevall. "Material Efficient Manufacturing of Three-Dimensional Components Using Metal Knitting." Key Engineering Materials 554-557 (June 2013): 1806–13. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.1806.
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The high investment cost and long lead-time to design and manufacture a forming tool is a major obstacle for local manufacturing of products in sheet metal. To minimize resource consumption large efforts are put into increase material efficiency by reducing the thickness of the sheet and move towards production methods with less scrap percentage. Nevertheless, the scrap portion is still high, in the automotive industry often as high as 50%. This paper discuss the possibilities of introducing knitting of metal wire into metal engineering industry to manufacture scrap free, light-weight three dimensional components in metal. Knitting could be a way of obtaining material efficient production within metal engineering industry especially for small and medium sized enterprises, SME. A knitting machine is able to produce large amounts of products at low price with moderate investments costs. For certain products knitting offer a simplified production of ready formed, 3D components. Experiments with knitting stainless steel wire were performed in order to establish the possibilities and limits of knitting today as well as identify development possibilities. The experiments covered improving the stiffness of the metal knit-wear by using different knitting techniques as well as introducing subsequent manufacturing steps such as surface treatment and joining. Demonstrators where produces for a number of geometries; squares, rectangles, boxes, hour-glass like in 2D and tubular, conical and T-tube shaped in 3D. For two geometries produced with knitting and sheet metal forming the material efficiency was compared. The first geometry used 32 % less material in the knitted product compared to the sheet metal component. The second geometry used 72 % less material in the knitted component compared to the sheet metal component. However, properties like strength and stiffness will be considerable less for a knitted component than for a sheet metal component. Today applications for the knitted materials have to be chosen carefully to take advantage of the potential of the material. With further development of both the knitting technique and subsequent operations the process will open new possibilities of material efficient and light-weight manufacturing.
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Эліна, Т. В., and Л. Є. Галавська. "РОЗРОБКА КОНСТРУКЦІЇ ТА ТЕХНОЛОГІЇ ВИГОТОВЛЕННЯ АДАПТИВНИХ ШКАРПЕТОК ДЛЯ ЛЮДЕЙ З ВАДАМИ ГОМІЛКОСТОПУ." Fashion Industry, no. 1 (May 25, 2021): 43–50. http://dx.doi.org/10.30857/2706-5898.2021.1.2.
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Development of functional socks for people with special needs who have diseases associated with ankle defects, including patients with diabetes.Methodology. The analytical method of reviewing scientifi c, technical, and patent documentation in the fi eld of research is used in the work. An experimental method for determining the elongation on a tensile tester WDW-05M, unfolding method. Analysis of problems associated with the elimination of excess pressure of the sock on the foot in people with increased measurements of the feet and ankles due to gunshot wounds, injuries or chronic diseases, including varicose veins, diabetes, edema, tumors, etc. confi rms the need to deve lop a new range of functional sock products. In the course of the research, the properties of weft-knitted structures were analyzed and a scientifi cally substantiated design of adaptive socks for home use was proposed. The design includes at least two sections, the elastic properties of which diff er. The back side of the leg, heel, sole, and toe are made of 1x1 rib knit, the instep and the front part of the leg are made of 3x3 rib knit. The section with higher stretchability and elasticity, made of 3x3 rib knit, softly maintains the shape of the socks’ leg, practically without creating pressure on the ankle and allowing to signifi cantly increase the perimeter of the sock in the area of the foot, toes, and/or heel. A sam ple of adaptive socks made of PAN yarn 32x2 tex х4 by knitting according to the shape of the unfolding of its 3D surface was made on the fl at knitting machine PVRK of the 8-th gauge. The connection of the product's parts in order to give the product a three-dimensional shape is made on a linker machine Hague D280E.Practical value. The design and technology of manufacturing functional socks have been developed. It is proposed to use industrial and semi-industrial double-bed fl at-knitting machines as technologic al equipment for their production. The use of various rib knit patterns for diff erent functional zones o f a sock allows providing the set value of conditional tension of threads when using the sock on a foot of atypical measurements.
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Березін, Л. М. "ДО РОЗРАХУНКУ ГЕОМЕТРИЧНИХ ПАРАМЕТРІВ ПОДАТЛИВИХ ГРАНЕЙ КЛИНІВ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 138, no. 5 (February 3, 2020): 9–16. http://dx.doi.org/10.30857/1813-6796.2019.5.1.
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Development of recommendations for calculating the geometry of cams with flexibility facet, which have console beams with variable moment of section resistance along their length for provide strength conditions and specified deflections. Method of search, description, analogous and information analysis is used to audit the many possible decisions regarding the subject of research, the experience in the field of knitting machines of automatic half-hose machine and methods of cross and longitudinal sections from the classical position of resistance of materials. Mathematical support for the complex approach of working out of cams of various designs with flexibility working facets according to the criteria of strength, flexibility and minimization of geometric dimensions using the beam shape coefficient of deflections is presented. The advantages of beams with equal resistance along its length in comparison with homogeneous beams having constant section sizes are shown. The dependences are given, which advisable to determine the dimensions of the root and final sections of a trapezoidal beam with a free end load of concentrated force, and also formulas for calculating the shape coefficient by deflection with sufficient accuracy and convenience in engineering calculations. Further development of the theory and methodology of designing elements of knitting systems of automatic half-hose machine based on load modes, dimensions restrictions and technological process requirements. Questions are presented that contribute to a comprehensive approach to the improvement of cams designs with flexibility facet based on calculated recommendations, taking into account their specificity. The information helps to improve the quality and efficiency of cam design solutions to meet the requirements for strength and flexibility using the economic index of section.
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Husain, Muhammad Dawood, Richard Kennon, and Tilak Dias. "Design and fabrication of Temperature Sensing Fabric." Journal of Industrial Textiles 44, no. 3 (July 26, 2013): 398–417. http://dx.doi.org/10.1177/1528083713495249.
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A temperature sensing fabric is described, along with the manufacturing techniques required to produce the fabric on a computerised flat-bed knitting machine. Knitted sensing fabrics with copper, nickel and tungsten wire elements have been produced with resistances ranging from 3 to 130 Ω. The most successful samples have been created using textile-wrapped, enamelled wire and not only the textile character of the sensing element was enhanced, but also its tensile strength. A mathematical relationship has been derived between the temperature and resistance of the knitted sensors and this can be used to optimise its dimensions to achieve a targeted reference resistance. The temperature-resistance curves demonstrate a linear trend with a coefficient of determination in the range of 0.99–0.999 and can be integrated into garments to monitor skin temperatures.
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Chen, Yongdang, Fuli Xiao, Lin Yu, and Pengjuan Cui. "Design of Multi-Line Elastic Belt Conveying Control System for Knitting Machine Based on I2C Protocol." IEEE Access 8 (2020): 51803–9. http://dx.doi.org/10.1109/access.2020.2979627.
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Chen, Li, and Rui Zhang. "Pattern Generation Based on Julia Set and its Application in the Design of Seamless Underwear Products." Advanced Materials Research 332-334 (September 2011): 702–5. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.702.
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In order to improve the design capacity of knitted fabric pattern and explore new design thought, this article studies the fractal image generation of Julia set and applies it into the pattern design of seamless underwear products. It adopts VB programming to generate Julia set pattern based on escape time algorithm, and then uses part imaging and amplification or changes the function orders to get a lot of colorful patterns. When these generated patterns are imported under the help of Photon software, color part in the patterns will be replaced with pre-designed fabric patterns and finally comes with patterns identifiable to seamless underwear knitting machine. Such method greatly expands the design thoughts of seamless underwear products.
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Zhao, Shuaiquan, Hong Hu, Hasan Kamrul, Yuping Chang, and Minglonghai Zhang. "Development of auxetic warp knitted fabrics based on reentrant geometry." Textile Research Journal 90, no. 3-4 (August 1, 2019): 344–56. http://dx.doi.org/10.1177/0040517519866931.
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This paper reports a novel method to fabricate auxetic warp knitted fabrics on a tricot warp knitting machine based on a special structure design and knitting process. Three auxetic warp knitted structures were successfully developed and all of them were designed to form a reentrant hexagonal geometry to acquire an auxetic effect. To provide the fabrics with reentrant frames, elastomeric yarns and stiff yarns were used to form the elastic underlaps and stiff underlaps, respectively. While the elastic underlaps can keep the reentrant structures stable, the stiff underlaps can support the reentrant structures to keep their reentrant frames. To alleviate the transfer of yarns in the loops under tension, an additional front yarn guide bar was used to feed binding yarns to basic reentrant structures. After knitting, all the fabrics were subjected to a heat setting process to keep their shape and a tensile test to assess their auxetic behavior. The experimental results showed that all the fabrics exhibited an obvious auxetic behavior within a wide range of strain. In particular, the fabrics retained auxetic behavior until breaking when stretched in the wale direction, and the Poisson’s ratio of the fabrics could be as low as –0.5. On the other hand, the fabrics exhibited a large tensile elongation when stretched in the course direction and their Poisson’s ratios changed from negative to positive after the tensile strain exceeded a certain value.
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Ten Bhömer, Martijn, Hai-Ning Liang, Difeng Yu, Yuanjin Liu, Yifan Zhang, Eva De Laat, and Carola Leegwater. "Designing Predictive Tools for Personalized Functionalities in Knitted Performance Wear." Temes de Disseny, no. 35 (July 25, 2019): 42–75. http://dx.doi.org/10.46467/tdd35.2019.42-75.
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Developments of advanced textile manufacturing techniques—such as 3D body-forming knitwear machinery—allows the production of almost finalized garments, which require little to no further production steps to finalize the garment. Moreover, advanced knitting technology in combination with new materials enables the integration of localized functionalities within a garment on a “stitch by stitch level.” There is potential in enhancing the design tools for advanced knitting manufacturing through the use of technologies such as data gathering, machine learning, and simulation. This approach reflects the potential of Industry 4.0, as design, product development, and manufacturing are moving closer together. However, there is still limited knowledge at present about how these new technologies and tools can have an impact on the creative design process. The case study presented in this paper explores the potential of predictive software design tools for fashion designers who are developing personalized advanced functionalities in textile products. The main research question explored in this article is: “How can designers benefit from intelligent design software for the manufacturing of advanced personalized functionalities in textile products?”. Within this larger research question three sub-research questions are explored: (1) What kind of advanced functionalities can be considered for the personalization process of knitwear? (2) How to design interactions and interfaces that use intelligent predictive algorithms to stimulate creativity during the fashion design process? (3) How will predictive software impact the manufacturing process for other stakeholders and production steps? These questions are investigated through the analysis of a Research Through Design case study, in which several predictive algorithms were compared and implemented in a user interface that would aid knitwear designers during the development process of high-performance running tights.
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Ren, Wen, and Sencai Lai. "Embedded Electronic Jacquard Guide Bar: A New Approach to Warp Knitting Using the Machine Jacquard Control System." Fibres and Textiles in Eastern Europe 26, no. 6(132) (December 31, 2018): 95–101. http://dx.doi.org/10.5604/01.3001.0012.5172.
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A fluorine-containing acrylate copolymer emulsion was prepared in this study, which was The jacquard control system is one of the crucial parts of a warp knitting machine. In this paper, we present a new jacquard control scheme called the embedded electronic jacquard guide bar (EEJGB). In this scheme, the Micro-Controller Unit (MCU), jacquard driver circuit, DC powers, and communication interfaces are integrated to achieve a simple structure, high reliability as well as ease of installation and maintenance. Specifically an innovative communication strategy with the advantages of fault tolerance and automatic addressing based on the Modbus serial bus is formulated. This paper describes the design of the hardware structure, communication methods of EEJGB, and printed circuit board (PCB), provided to demonstrate the feasibility of the method proposed.
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Ren, Wen, Xia Wen, and Sencai Lai. "Design of an Adaptive Boost Energy-Saving Fuzzy Control System Driven by the Finite State Machine." Mathematical Problems in Engineering 2021 (May 7, 2021): 1–12. http://dx.doi.org/10.1155/2021/9924836.
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Aiming at the challenging problem of the traditional warp knitting machine electronic jacquard control system with complex structure of multiple circuit boards layered cascade, such as large physical space occupation, high power consumption, and independent high-voltage power supply voltage, we proposed an embedded circuit and control strategy design for the piezoelectric jacquard needle (PJN) with adaptive boost and energy recovery functions. Firstly, the electromechanical dynamics model of PJN was established. Secondly, the fuzzy PI double closed-loop control algorithm driven by a finite state machine is proposed. Thirdly, with the help of a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), the PJN is integrated with the drive circuit. The drive circuit of PJN uses an energy storage inductor to replace the current limiting resistor of the traditional drive circuit, which can not only limit the forward charging current of the PJN and reduce energy loss but also can use the energy absorbed from the low-voltage power supply to adaptively boost the power supply of the PJN to the high voltage required for working conditions. The simulation results show that the new PJN drive circuit has an adaptive self-boost function. The PWM signal modulated by the fuzzy PI double closed-loop control algorithm can efficiently and accurately control the adaptive boost power supply and the voltage across the PJN. The mode of the circuit can be correctly switched through the sequential logic of the finite state machine and realize the energy recovery function.
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Mermelstein, Sylvia P., and Memis Acar. "Modelling the pattern creation process for the optimum design of a circular warp-knitting machine using a conical needle-bed." Journal of the Textile Institute 98, no. 5 (September 28, 2007): 397–408. http://dx.doi.org/10.1080/00405000701464050.
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Ahn, Jinwook, and Jungsik Jang. ""A Study on the Development of Mobile GUI Design Usability Evaluation Principles for the Convenience of Using the Knitting Machine"." Journal of Industrial Design Studies 14, no. 4 (December 31, 2020): 119–28. http://dx.doi.org/10.37254/ids.2020.12.54.11.119.
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Atalay, Ozgur, Asli Tuncay, Muhammad D. Husain, and William R. Kennon. "Comparative study of the weft-knitted strain sensors." Journal of Industrial Textiles 46, no. 5 (July 28, 2016): 1212–40. http://dx.doi.org/10.1177/1528083715619948.
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In this study, weft-knitted strain-sensing structures are described, along with the materials and manufacturing techniques required to produce the fabrics on a computerised flat-bed knitting machine. Knitted sensing fabrics with conductive yarns, i.e. silver-plated nylon yarn and polyester-blended stainless steel yarn have been created with different design possibilities. A laboratory test set-up was built to characterise the knitted sensors and the resulting equivalent resistance under the different level of strains. The most successful samples have been realised through a series of single conductive courses within the interlock base fabric structure using silver-plated nylon in terms of responsivity, repeatability and lower electrical signal drift. Deficiencies associated with strain-sensing structures realised through the intermeshing of conductive yarns have also been addressed.
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Dawit, Hewan, Qian Zhang, Yimeng Li, Syed Rashedul Islam, Jifu Mao, and Lu Wang. "Design of Electro-Thermal Glove with Sensor Function for Raynaud’s Phenomenon Patients." Materials 14, no. 2 (January 14, 2021): 377. http://dx.doi.org/10.3390/ma14020377.
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Raynaud’s phenomenon (RP) is a disease that mainly affects human fingertips during cold weather. It is difficult to treat this disease using medicine, apart from keeping the body in a warm environment. In this research, conductive knitted fabrics were fabricated to help relax the vessels of the patient’s fingertips by providing proper heat, and also serving as a sensor to detect finger motion after relaxation of the blood vessels of patients. Four different structures, termed plain, purl, interlock, and rib were produced using conductive silver/PE (polyethylene) yarn and wool yarn, with a computerized flat knitting machine. The effect of knitted structure on the electro-thermal behavior, sensitivity, and stability of resistance change (∆R/R) under different tensile forces was investigated. By comprehensive comparison, the purl structure was identified as the preferred structure for the heating glove for RP patients, owing to superior electro-thermal behavior. Additionally, the purl structure had a greater capacity to detect different motions with stable resistance change. This potential electro-thermal glove could be used for functional, as well as aesthetic (fashion) purposes, and could be worn at any time and occasion with complete comfort.
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Shahzad, Amir, Naseer Ahmad, Zulfiqar Ali, Ali Afzal, Muhammad Bilal Qadir, Zubair Khaliq, and Muhammad Qamar Khan. "Statistical analysis of yarn to metal frictional coefficient of cotton spun yarn using Taguchi design of experiment." Journal of Strain Analysis for Engineering Design 53, no. 7 (July 11, 2018): 485–93. http://dx.doi.org/10.1177/0309324718786373.
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Yarn’s surface to metal friction is an important consideration in the subsequent process of knitting and weaving as it influences mainly the ends down rate, fly generation, process efficiency, wear and tear of machine parts, and production rate of the process. These frictional properties are measured in terms of the coefficient of friction of yarn. The effect of cotton type, yarn twist, yarn linear density, process type, and finishing treatment was studied on the surface to the metal friction coefficient of cotton spun yarn using Taguchi experimental design. The experiments were conducted with Pakistani and Indian cotton using combed and carded ring spinning processes. Using Taguchi design of experiment, a total of 36 samples of cotton ring-spun yarns were produced. The coefficient of friction between the yarn’s surface and metal’s surface is measured in compliance with ASTM D3108. The outcome of the Taguchi model to predict the coefficient of friction of yarns with a predefined combination of constituting parameters was further confirmed with nine yarn samples. The frictional characteristics of yarns are found to be influenced by all factors. In addition to the application of wax, the longer fiber length, lower trash count, lower short fiber index, and the optimum level of twist are found advantageous to reduce the yarn coefficient of friction.
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Vallett, Richard, Ryan Young, Chelsea Knittel, Youngmoo Kim, and Genevieve Dion. "Development of a Carbon Fiber Knitted Capacitive Touch Sensor." MRS Advances 1, no. 38 (2016): 2641–51. http://dx.doi.org/10.1557/adv.2016.498.
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ABSTRACTTextiles, in combination with advances in materials and design, offer exciting new possibilities for human and environmental interaction, including biometric and touch-based sensing. Previous fabric-based or flexible touch sensors have generally required a large number of sensing electrodes positioned in a dense XY grid configuration and a multitude of wires. This paper investigates the design and manufacturing of a planar (two-dimensional, XY location) touch fabric sensor with only two electrodes (wires) to sense both planar touch and pressure, making it ideal for applications with limited space/complexity for wiring. The proposed knitted structure incorporates a supplementary method of sensing to detect human touch on the fabric surface, which offers advantages over previous methods of touch localization through an efficient use of wire connections and sensing materials. This structure is easily manufactured as a single component utilizing flatbed knitting techniques and electrically conductive yarns. The design requires no embedded electronics or solid components in the fabric, which allows the sensor to be flexible and resilient. This paper discusses the design, fabrication, sensing methods, and applications of the fabric sensor in robotics and human-machine interaction, smart garments, and wearables, as well as the highly transdisciplinary approach pursued in developing medical textiles and flexible embedded sensors.
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Kumar, Bahadur Goonesh, Satyadev Rosunee, and Mark Bradshaw. "Measuring electromagnetic shielding efficiency of 1×1 plain knitted fabrics." International Journal of Clothing Science and Technology 29, no. 4 (August 7, 2017): 525–38. http://dx.doi.org/10.1108/ijcst-08-2016-0100.
Full textAbstract:
Purpose In this research project, electrical conductive yarns were knitted together with 100 per cent cotton yarns to create knitted fabrics that would be used as electromagnetic (EM) shielding materials. The paper aims to discuss these issues. Design/methodology/approach 1×1 plain fabrics knitted on double-bed hand knitting machines of five and seven gauges. Several strands of the cotton yarns were used together in order to knit samples with good handling properties. The electrical conductive yarn has six plies and each ply has 29 filaments with Naño-coating of silver and having an electrical resistance of 4 Ohms per 100 mm and a count of 96 Tex. The knitted fabrics have similar texture but vary in term of specific weight, fabric density, loop length, Tex, tightness factor, thickness and electrical conductivity. These variations affected the properties of the fabrics, determining factors of a good shielding or not. A special designed Faraday cage was built to measure the EMSE of each knitted fabrics. The EM waves were sent through the signal generator at different frequencies as from 400 to 1,100 MHz and with three different power inputs of 10, 20 and 30 dBm. EMSE measurements were also carried out after the knitted samples were rotated clockwise. Findings Good EMSE shielding results were achieved with the knitted samples, however in this study it was found that different knitted fabrics shielded better at specific frequencies and power inputs. Practical implications Knitted fabrics can be used to develop comfortable garments that can be used to shield EM waves and protect the wearer. Originality/value The choice of using the conductive yarns is exclusive. In addition the EMSE were measured with fabrics knitted in the same structure but on different knitting machine gauge. Three different power inputs were considered and EMSE measurements were taken using frequencies as from 400 to 1,100 MHz. A new method for measuring the electrical resistance on the knitted fabrics and the method used for measuring the EMSE for each knitted fabric were considered.