The interaction of moving yarns with stationary surfaces

Shim, Woo Sub; Lee, Hun; Lee, Duck Weon

doi:10.1007/s12221-013-0164-x

Cited by 4 publications

(4 citation statements)

References 27 publications

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“…During the spinning process, the traveler moves around the ring along with yarn. As a result, the traveler has tribology with both the ring and yarn involving a complex wear profile, as mentioned in Figure 2 [27,29,30]. Between two components, the ring is stationary and the yarn is moving; hence, the friction between the moving components (traveler and yarn) is exceptionally high [29,30].…”

Section: Wear Resistancementioning

confidence: 99%

“…As a result, the traveler has tribology with both the ring and yarn involving a complex wear profile, as mentioned in Figure 2 [27,29,30]. Between two components, the ring is stationary and the yarn is moving; hence, the friction between the moving components (traveler and yarn) is exceptionally high [29,30]. In addition, yarn is a thin strand having a higher relative speed than the traveler due to the dragging tension of winding by the spinning bobbin, and there is a lag of speed between the traveler and spinning bobbin due to friction with the ring.…”

Section: Wear Resistancementioning

confidence: 99%

“…In addition, yarn is a thin strand having a higher relative speed than the traveler due to the dragging tension of winding by the spinning bobbin, and there is a lag of speed between the traveler and spinning bobbin due to friction with the ring. This altogether makes the friction between the yarn and traveler very prominent, causing severe and sharp wear on the traveler (Figure 2, case 1); thus, it is mainly responsible for the short life of the traveler [27,28,30]. In Figure 3, images of ring-spinning travelers after the trial on spinning frame are presented that were worn out at different cycles (also called doff/doffing, the process of unloading/collecting a full package and replacing it with an empty one); molded chopped fiber-filled (Figure 3a,b), printed plastic (Figure 3c), printed, chopped, fiber-filled plastic (Figure 3d), and printed, chopped, and continuous fiber-filled plastic travelers (Figure 3e,f) after four, one, two, and one doffs, respectively.…”

Section: Wear Resistancementioning

confidence: 99%

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Comparing Performance of 3D-Printed and Injection-Molded Fiber-Reinforced Composite Parts in Ring-Spinning Traveler Application

2021

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Fiber-reinforced 3D printing (3DP) technology is a recent addition to the material extrusion-based 3DP process unlocking huge potential to apply this technology for high-performance material fabrication with complex geometries. However, in order to take the full advantage of this technology, a comparative analysis with existing technologies targeting a particular application is necessary to understand its commercial applicability. Here, an applied composite part, ring-spinning travelers, has been developed using the unique design features of fiber-reinforced 3DP technology that is beyond the capability of the currently used technology; the injection molding, quality, and performance of the printed and molded travelers were investigated and compared. The results demonstrated that fiber-reinforced 3DP is a promising technology that offers a lot of flexibility regarding reinforcement patterns and materials including both short and continuous fibers to tailor the performance, although the printed travelers showed poorer surface characteristics and wear resistance than the molded travelers. Based on the present analysis, a number of recommendations have been proposed on the design of the traveler to apply the technology effectively and use the printer to improvise and manipulate the performance of the travelers.

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Section: Wear Resistancementioning

confidence: 99%

Section: Wear Resistancementioning

confidence: 99%

Section: Wear Resistancementioning

confidence: 99%

See 1 more Smart Citation

Comparing Performance of 3D-Printed and Injection-Molded Fiber-Reinforced Composite Parts in Ring-Spinning Traveler Application

2021

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“…Our Equation ( 28) is more general than the similar equations in the literature. [1][2][3][4][5][6][7][12][13][14][15][16][17][18][19][20][21] Namely, we obtain an additional term À _…”

Section: à _mentioning

confidence: 99%

Balloon theory of yarn during unwinding from packages

Praček

Pušnik

Franken

et al. 2016

Textile Research Journal

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Yarn unwinding from a package is a key problem in many textile processes, such as weft insertion and warping. Stability of the unwinding has a direct influence on the efficiency of the entire textile process and the quality of the final product. The quality of the yarn is numerically expressed mainly in terms of mechanical quantities. In the unwinding process, viscoelastic properties are the most important. They depend on how the yarn is stressed. The quality of the yarn that is being unwound should not be reduced, unless this reduction does not significantly lower the quality of the fabric. We strive to achieve as large warping and weaving speeds as possible; therefore, our aim is to improve the theory of cross-wound package unwinding and to find the necessary modifications of the yarn unwinding process. The goal of our contribution is to state the equations of motion that describe the unwinding yarn.

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Method for deriving twisting process parameters of large package E-glass yarn by measuring physical properties of bobbin yarn

Wang,

Chen,

et al. 2023

Science and Engineering of Composite Materials

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Twisting is an important part in the production process of large package E-glass yarn. To derive the twisting process parameters of large package E-glass yarn, a method from the physical properties of bobbin yarn is proposed based on the study of the twisting principle of E-glass yarn. After unwinding the bobbin yarn and measuring its twist, loop pitch, and corresponding diameter, the calculation is completed according to the steps of first determining the descending speed of the traveler, then fitting the spindle speed data, and finally calculating the elevating speed of the traveler. The result is that the twisting spindle speed of D450 E-glass yarn with 31.8 T/m decreases from 5,015 to 4,550 rpm, the elevating speed of the traveler is 0.91 m/min, and the descending speed of the traveler is 1.50 m/min. The accuracy of the calculation is verified by monitoring the rotating speed of the roving cake and measuring the loop pitch of bobbin yarn in the twisting experiment. The result shows that the prediction error of this method is less than 1.1%, which can effectively derive the twisting process parameters of large package E-glass yarn, and provide a reference for the twisting process design scheme of glass fiber strand manufacturers.

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The interaction of moving yarns with stationary surfaces

Cited by 4 publications

References 27 publications

Comparing Performance of 3D-Printed and Injection-Molded Fiber-Reinforced Composite Parts in Ring-Spinning Traveler Application

Comparing Performance of 3D-Printed and Injection-Molded Fiber-Reinforced Composite Parts in Ring-Spinning Traveler Application

Balloon theory of yarn during unwinding from packages

Method for deriving twisting process parameters of large package E-glass yarn by measuring physical properties of bobbin yarn

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