Sen'i Kikai Gakkaishi (Journal of the Textile Machinery Society of Japan)
Online ISSN : 1880-1994
Print ISSN : 0371-0580
ISSN-L : 0371-0580
Volume 47, Issue 4
Displaying 1-10 of 10 articles from this issue
  • 1994 Volume 47 Issue 4 Pages P179a
    Published: 1994
    Released on J-STAGE: October 27, 2009
    JOURNAL FREE ACCESS
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  • 1994 Volume 47 Issue 4 Pages P179b
    Published: 1994
    Released on J-STAGE: October 27, 2009
    JOURNAL FREE ACCESS
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  • Yo-ichi Matsumoto, Kouichiro Toriumi, Kazuhisa Harakawa
    1994 Volume 47 Issue 4 Pages T83-T88
    Published: April 25, 1994
    Released on J-STAGE: October 27, 2009
    JOURNAL FREE ACCESS
    The yarn count and the twist level of spun yarn are deeply concerned not only with the quality and structure of the yarn, but also the efficiency of production of the spinning frame. The quality and structure of yarn produced by using the throstle-spinning frame are affected by the mean spinning tension and the kind of raw materials used.During actual operation of the throstle-spinning frame, the efficiency of rotation of the stuffer tube, and the linear density and the twist level of the yarn were measured. The main factors determining the linear density and the twist level of throstle-spun yarn were analysed and discussed.
    It was found that the twist level and the linear density of throstle-spun yarn depended on the efficiency of rotation of the stuffer tube and the inherent constant of the raw material, respectively. Under an appropriate spinning tension, the twist factor of throstle-spun yarn made of a random fiber assembly was a constant value. It also became clear that the throstle-spinning process had a dynamically auto-balancing mechanism between the yarn count and twist level of the yarn produced.
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  • Sukenori Shintaku, Toshiyasu Kinari, Junnya Hori
    1994 Volume 47 Issue 4 Pages T89-T95
    Published: April 25, 1994
    Released on J-STAGE: October 27, 2009
    JOURNAL FREE ACCESS
    Stress distribution in the yarn package wound on the flanged bobbin is made clear by using the data of model experiment on which yarn packages are formed by several kinds of yarn that has different Young's modulus. They are also useful for obtaining the deformation of the flanged bobbin using the finite element analysis. The following results are obtained.
    (1) The smaller Young's modulus of the yarn, the larger the radial load compressing the barrel of the flanged bobbin. Increasing rate of the radial compressive stress decreases with accumulated yarn layer.
    (2) The smaller Young's modulus of the yarn, the larger the axial load expanding the flanges of the bobbin. Increasing rate of the axial expanding load increases with cumulated yarn layer.
    (3) The radial load compressing the barrel of bobbin is larger than the axial load expanding its flanges.
    (4) The smaller Young's modulus of the yarn, the larger the flanged bobbin deforms by internal stess in yarn package.The maximum deformation is generated near the root of its flanges.
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  • Michinori Kawano, Kazuta Mitsuishi, Kazumasa Ogahara, Michihiro Ogahar ...
    1994 Volume 47 Issue 4 Pages T96-T102
    Published: April 25, 1994
    Released on J-STAGE: October 27, 2009
    JOURNAL FREE ACCESS
    Since ordinary woven fabrics (bi-axial fabrics) are composed of warps and fillings, the modulus of elasticity and the tensile resistance in bias direction lower relatively as compared with those in warp and filling directions. In order to improve the characteristics like this, new fabrics“Tetra-axial woven Fabrics”composed of warps, fillings and bias yarns were made, and assessment was performed on the physical properties of fabrics.
    In the experiment, the effcts that the difference in the structures of bi-axial and tetra-axial fabrics exerted to the load-elongation curves, the tensile resistances, the moduli of elasticity and the tearing strengths were investigated.The tensile tests was carried out based on technique of F.L.Scardino.and F.K.Ko.The tensile resistance and the modulus of elasticity of bi-axial fabrics lowered severely in bias direction, but in tetra-axial fabrics, the dependence on the tensile direction was very small.On the other hand, the tearing strength of tetra-axial fabrics increased largely as compared with that of bi-axial fabrics.
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  • A. Okamoto
    1994 Volume 47 Issue 4 Pages P147-P151
    Published: April 25, 1994
    Released on J-STAGE: October 27, 2009
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  • F. Tokumori
    1994 Volume 47 Issue 4 Pages P152-P160
    Published: April 25, 1994
    Released on J-STAGE: October 27, 2009
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  • Y. Kitagawa
    1994 Volume 47 Issue 4 Pages P161-P166
    Published: April 25, 1994
    Released on J-STAGE: October 27, 2009
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  • K. Nakamura
    1994 Volume 47 Issue 4 Pages P167-P173
    Published: April 25, 1994
    Released on J-STAGE: October 27, 2009
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  • The Future of Our Textile industry
    Katsuji Kodama
    1994 Volume 47 Issue 4 Pages P174-P179
    Published: April 25, 1994
    Released on J-STAGE: October 27, 2009
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