Sen'i Kikai Gakkaishi (Journal of the Textile Machinery Society of Japan)

Measurement of Drape Coefficients of Fabrics and Description of Hanged Shapes of Fabrics

part 2 : Description of Hanged Shapes About Anisotropic Fabrics

Minzhuang Yang, Mitsuo Matsudaira

1998 Volume 51 Issue 4 Pages T65-T71
Published: April 25, 1998
Released on J-STAGE: February 01, 2010

DOIhttps://doi.org/10.4188/transjtmsj.51.4_T65

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To investigate about fabric drapability of anisotropic fabrics, a method to decide the direction of a node isproposed, and the hanged shape of fabric is described using trigonometric function. Relationship between thetrigonometric function and basic mechanical parameters is also investigated. Following conclusions wereobtained :
1) Deciding at least one node for a fabric in the direction of larger value of B and/or 2HB in the warp or weftdirection, hanged shape of fabric becomes stable and reproducibility of measurement becomes high .
2) Two-dimensional projection of fabric shape is described by the equation ; r (θ) =(a+a_mcos (a_nθ+α))+ (b+b_mcos (b_nθ+β)) cos (n (θ-90)), and the drape coefficient obtained by the equation;D= (4a²+2b²+2a²_m+b²_m-4R²₀) /12R²₀, agreed well with the actual one. Further, the hanged shape obtained theoretically also agreed well with the actual one.
3) Constants in the trigonometric function can be regressed well with fabric basic mechanical parameterswith high accuracy.

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Effects of Sled Velocity on Fabric Friction

J.O. Ajayi, H.M. Elder, K.A. Bello, E.G. Kolawole, M.I.. Darma

1998 Volume 51 Issue 4 Pages T72-T79
Published: April 25, 1998
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.51.4_T72

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The influence of velocity of sliding on some new frictional parameters of weft pile fabrics is reported. The frictional amplitude diminish as the velocity of motion increased. The kinetic frictional resistance also diminish initially, and then increased as the velocity of sliding increased. The initial decrease in resistance to motion is attributed to viscoelastic effects while the increase in resistance to motion at higher speeds is ascribed to mechanical interlocking of surface structure. The amplitude of frictional resistance and number of peaks are shown to be related to some partinent fabric properties such as cord height and number respectively.

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Development of an Auto-Doffer for Covering Machines

Part 5 : Control of Autonomous Vehicle for Doffing Operation

Kiyoshi Hatta, Junya Hori, Toshiyasu Kinari, Sukenori Shintaku

1998 Volume 51 Issue 4 Pages T80-T86
Published: April 25, 1998
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.51.4_T80

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Autonomous vehicle is developed corresponding to conventional type covering machine which has slightly indented spindles and the curved frames. It is controlled to stop at proper position for doffing operations.
(1) A pair of laser displacement sensors enable the autonomous vehicle to obtain the high positioning accuracy. It is efficient to improve the sensing faculty for vehicle control underthe bad environment where slipage easily occurs or there is often disturbance.
(2) Moving vehicle experiment confirms the efficiency of the feedback control. It enables stop accuracy about ± 3mm for preparating operation of manufacturing covered yarns, such as drawing-in a core yarn.
(3) Using the laser displacement sensor which has ± 40mm in measurement range, the vehicle is able to correspond for less then 10mm in side disturbance, 5mm in vertical disturbance, and 1% in slope of floor.

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[title in Japanese]

Akira MIYOSHI

1998 Volume 51 Issue 4 Pages P211-P218
Published: April 25, 1998
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.51.4_P211

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Shingosen Technology in terms of Hand and Silk Fabrics

Tatsuki MATSUO

1998 Volume 51 Issue 4 Pages P219-P224
Published: April 25, 1998
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.51.4_P219

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Weaving Techniques of Hand Loom in Nishijin Textiles and Development of Its Automatic Motion

Tomoyoshi TSUTIYA

1998 Volume 51 Issue 4 Pages P225-P230
Published: April 25, 1998
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.51.4_P225

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[title in Japanese]

Tetsutoshi NAKAJIMA

1998 Volume 51 Issue 4 Pages P231-P241
Published: April 25, 1998
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.51.4_P231

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High Quality Silk and the Year, Round Production Technique of Aseptic Rearing with an Artificial Diet

Fujiyoshi MATSUBARA, Takashi YAMAZAKI

1998 Volume 51 Issue 4 Pages P242-P248
Published: April 25, 1998
Released on J-STAGE: February 12, 2010

DOIhttps://doi.org/10.4188/transjtmsj.51.4_P242

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[title in Japanese]

Yoshikazu YAMASAKI

1998 Volume 51 Issue 4 Pages P249-P255
Published: April 25, 1998
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.51.4_P249

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