3D knitting using large circular knitting machines

Simonis, Kristina; Gloy, Yves-Simon; Gries, Thomas

doi:10.1088/1757-899x/254/9/092004

Cited by 8 publications

(13 citation statements)

References 3 publications

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“…There are no machine modifications on jacquard knitting machines needed and the productivity of large circular knitting machines can be enhanced with the new technology. As it is generally the case with 3D knitting, the prerequisite for this application is individual needle control, which means a jacquard machine is required [3][4][5][6][7].…”

Section: State Of the Art -Principle Of Forming 3d-textiles On Large Circular Knitting Machinesmentioning

confidence: 99%

“…The other needles continue to form loops, but produce these on the backside of the knitted fabric. In this way, the continuous movement of the circular knitting machines can be maintained and the effective surface area can be reduced [3][4][5][6].…”

Section: State Of the Art -Principle Of Forming 3d-textiles On Large Circular Knitting Machinesmentioning

confidence: 99%

“…It is still necessary to cut the fabric out of the knitted tube and the reduced fabric remains on the backside (Fig. 2), and therefore does not reduce the amount of material used [3][4][5][6].…”

Section: State Of the Art -Principle Of Forming 3d-textiles On Large Circular Knitting Machinesmentioning

confidence: 99%

“…3D-textile architectures are typically produced on flat knitting machines or special seamless machines. Fuhrmann et al previously developed a basic principle of forming 3D-textile architectures on large circular knitting machines [4][5][6].…”

Section: Introduction-definition 2d-and 3d-textilesmentioning

confidence: 99%

“…With the Eqs. (1)-(5) in the first step the path of each wale is mapped to the surface. In the second step, the wales are connected in course direction.…”

mentioning

confidence: 99%

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3D Knitted Preforms Using Large Circular Weft Knitting Machines

et al. 2021

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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.

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Section: State Of the Art -Principle Of Forming 3d-textiles On Large Circular Knitting Machinesmentioning

confidence: 99%

Section: State Of the Art -Principle Of Forming 3d-textiles On Large Circular Knitting Machinesmentioning

confidence: 99%

Section: State Of the Art -Principle Of Forming 3d-textiles On Large Circular Knitting Machinesmentioning

confidence: 99%

Section: Introduction-definition 2d-and 3d-textilesmentioning

confidence: 99%

“…With the Eqs. (1)-(5) in the first step the path of each wale is mapped to the surface. In the second step, the wales are connected in course direction.…”

mentioning

confidence: 99%

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3D Knitted Preforms Using Large Circular Weft Knitting Machines

et al. 2021

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3D Printing of Textiles: Potential Roadmap to Printing with Fibers

2019

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Abstract3D printing (3DP) has transformed engineering, manufacturing, and the use of advanced materials due to its ability to produce objects from a variety of materials, ranging from soft polymers to rigid ceramics. 3DP offers the advantage of being able to print at a variety of lengths scales; from a few micrometers to many meters. 3DP has the unique ability to produce customized small lots, efficiently. Yet, one crucial industry that has not been able to adequately explore its potential is textile manufacturing. The research in 3DP of textiles has lagged behind other areas primarily due to the difficulty in obtaining some of the unique characteristics of strength, flexibility, etc., of textiles, utilizing a fundamentally different manufacturing technology. Textiles are their own class of materials due to the specific structural developments that occur during the various stages of textile manufacturing: from fiber extrusion to assembly of the fibers to fabrics. Here, the current 3DP technologies are reviewed with emphasis on soft and anisotropic structures, as well as the efforts toward 3DP of textiles. Finally, a potential pathway to 3DP of textiles, dubbed as printing with fibers to create textile structures is proposed for further exploration.

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Aachen Technology Overview of 3D Textile Materials and Recent Innovation and Applications

et al. 2022

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This paper provides an overview of the recent definition, technologies and current trends regarding 3D fabrics. In this paper a definition of 3D fabrics, including spacer fabrics, is given and the recent technologies regarding weaving, braiding, weft and warp knitting and tailored fiber placement are presented. Furthermore, an overview of the latest developments in 3D fabrics at the Institut für Textiltechnik of RWTH Aachen University is presented including: large circular 3D knitting, braided and woven structures for medical purposes, newest testing methods and equipment for spacer fabrics, multiaxial fabrics for composites, warp knitted spacer fabrics for space and construction applications, ceramic matrix composite 3D braiding and 4D textiles.

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3D knitting using large circular knitting machines

Cited by 8 publications

References 3 publications

3D Knitted Preforms Using Large Circular Weft Knitting Machines

3D Knitted Preforms Using Large Circular Weft Knitting Machines

3D Printing of Textiles: Potential Roadmap to Printing with Fibers

Aachen Technology Overview of 3D Textile Materials and Recent Innovation and Applications

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