7—a Simple Yarn-Friction Tester for Use With Knitting Yarns

Hammersley, M. J.

doi:10.1080/00405007308630420

Cited by 6 publications

(12 citation statements)

References 2 publications

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“…Regression dependencies (11)(12)(13) (28) Figure 8 represents graphical dependencies reflecting influence of guide's radius on para-amid, meta-aramid, and carbon multifilament yarns tension for the I area, that have been obtained with the use of dependencies (20)(21)(22). Figure 9 represents graphical dependencies reflecting influence of guide's radius on para-amid, meta-aramid, and carbon multifilament yarns tension for the II area, that have been obtained with the use of dependencies (23)(24)(25). Figure 10 represents graphical dependencies reflecting influence of guide's radius on para-amid, meta-aramid, and carbon multifilament yarns tension for the III area, that have been obtained with the use of dependencies (26-28).…”

Section: Resultsmentioning

confidence: 99%

“…This method ensures independence of measurement result from parameters of conversion function and their deviations from nominal values [17][18][19]. While planning the experiment it is necessary to consider direction of relative shifting of friction surface [20,21], yarn sliding speed or guide surface movement speed [22,24], curvature radius of cylindrical surface [17,18,25]. Taking into account that para-aramid, metaaramid, and carbon multifilament yarns are used as warp yarns bending rigidity can be ignored [2,13].…”

Section: Introductionmentioning

confidence: 99%

“…Design of the experimental unit estimates the accuracy of the obtained results, while determining yarn tension. The papers [23][24] show the scheme for determination of the yarn tension. In this scheme the cylinders with big radii are used as guides.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Tension for Aramid and Carbon Yarns While Weaving Industrial Fabrics

Shcherban¹,

Kolysko²,

Melnyk³

et al. 2022

FaT

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Resulting from researches conducted to determine tension for para-aramid, meta-aramid, and carbon multifilament yarns during their contact with the operative parts of the weaving looms as part of the industrial fabrics formation process, we have found out that in threading areas the tension is increasing driven by variation of values of the friction forces in the contact area. It has been proven that tension degree of para-aramid, meta-aramid, and carbon multifilament yarns before industrial fabric formation area is influenced by (1) tension before cylindrical guide surface of an operative part, (2) radius of the cylindrical guide surface curve of the operative part, (3) contact angle between yarns and cylindrical guide surface of an operative part, (4) mechanical, physical and structural properties of para-aramid, metaaramid, and carbon multifilament yarns. It allowed (yet at the initial stage of design of technological process of industrial fabric formation) to determine para-aramid, meta-aramid, and carbon multifilament yarns tension before formation area depending on (1) form of threading line for yarns at the weaving loom, (2) mechanical, physical and structural properties of para-aramid, meta-aramid, and carbon multifilament yarns and industrial fabrics. The paper contains experimental research of interaction of para-aramid, metaaramid, and carbon multifilament yarns and cylindrical guide surfaces of the operative parts of automatic weaving looms. Based on experimental researches regression dependencies have been obtained between para-aramid, meta-aramid, and carbon multifilament yarns tension value after cylindrical guide surfaces of the operative part and (1) tension before cylindrical guide surface of the operative part, (2) radius of the cylindrical guide surface curve of the operative part, (3) contact angle between yarns and cylindrical guide surface of the operative part. Consecutive application of these regression dependencies allows to determine para-aramid, meta-aramid, and carbon multifilament yarns tension before industrial fabrics formation area. Analysis of regression dependencies allowed to find out values of technological parameters when para-aramid, meta-aramid, and carbon multifilament yarns tension before industrial fabrics formation area will be of minimum value. It will allow to minimize tension of para-aramid, metaaramid, and carbon multifilament yarns while manufacturing resulting in (1) yarn breakages reduction, (2) better productivity of weaving looms due to reduced stoppage time, (3) improved quality of manufactured industrial fabrics. Therefore, we can argue that suggested technological solutions are practically attractive. In view of this, it is reasonable to say that it is possible to directionally regulate the process of para-aramid, meta-aramid, and carbon multifilament yarns tension change while manufacturing industrial fabrics on the weaving looms through selection of values of guides’ geometrical parameters.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Determination of Tension for Aramid and Carbon Yarns While Weaving Industrial Fabrics

Shcherban¹,

Kolysko²,

Melnyk³

et al. 2022

FaT

View full text Add to dashboard Cite

show abstract

“…In work [18], when experimentally determining the tension of main threads with guides, its kinematic characteristics are taken into account, which are determined by the specificity of the technological process itself. In work [19], in the experimental setup, the guide surface was installed with the possibility of rotation about its axis. Moreover, the radius of curvature of the guide significantly exceeded the calculated radius of the main thread.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The adequacy of our regression dependences (3) to (8) was checked using the SPSS software for statistical treatment of experimental data [2,15,17]. Analysis of the significance of the coefficients of regression equations ( 3) to ( 8) made it possible to reject insignificant ones [2,[15][16][17][18][19]. In re-gression equations ( 5) to (8), the size of the overstep j Z must be substituted in degrees, and the size h, which characterizes the differential tension of shed, in millimeters.…”

Section: Combined Influence Of the Overstep And Different Tension Of ...mentioning

confidence: 99%

Determining the rational structure of multilayer technical fabric for woven power clamps

Shcherban,

Melnyk,

Kolysko

et al. 2024

EEJET

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The object of research is multi-layered technical fabrics for woven power clamps. A task to determine the rational structure of a multi-layer technical fabric for power clamps has been solved, which makes it possible to achieve an effect when introduced into production through the minimization of raw material costs and the reduction of energy costs for manufacturing a unit of products. The value of the beating force, the tension of warp threads of the outer protective layers, the force layers, the warp threads for connecting the outer protective layers, and the force layers for two structures of multilayer technical fabric were studied. A comparative analysis of conditions for the formation of two multilayer fabrics from polyamide threads was carried out and a multilayer fabric with the most rational structure was selected, the formation of which would require less technological effort. Experimental studies have made it possible to build regression dependences on determining the influence of the initial tension of warp threads of the outer protective layers on the beating force value. The joint effect of the size of an overstep and the different tension of a shed on the beating force value was established, depending on the structure of a multilayer technical fabric. It is shown that when the tension of warp threads of the outer protective layers increases, the beating force value increases. A value of the tension of warp threads in outer protective layers, force layers, warp threads for connecting the outer protective layers and force layers in the position of an overstep and at the moment of thread beating was determined. Analysis of regression dependences will make it possible to determine the optimal loading parameters of the loom. It has been proven that the beating force value is affected by the structure of a multi-layer technical fabric and the tension of warp threads in outer protective layers. The improved multi-layer technical fabric is used for laying pipes with an external factory-made polyethylene coating

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More about fibre friction and its measurements

Yuksekkay

2009

Textile Progress

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7—a Simple Yarn-Friction Tester for Use With Knitting Yarns

Cited by 6 publications

References 2 publications

Determination of Tension for Aramid and Carbon Yarns While Weaving Industrial Fabrics

Determination of Tension for Aramid and Carbon Yarns While Weaving Industrial Fabrics

Determining the rational structure of multilayer technical fabric for woven power clamps

More about fibre friction and its measurements

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