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 57, Issue 1
Displaying 1-2 of 2 articles from this issue
Original Papers
  • Tatsuharu IKEGUCHI, Kouichi OHTA, Hidenori TSUDUKI, Masaaki OKAMURA
    Article type: Others
    Subject area: Others
    2004 Volume 57 Issue 1 Pages T1-T6
    Published: 2004
    Released on J-STAGE: June 03, 2005
    JOURNAL FREE ACCESS
    Conventionally, CAD for textiles had regarded textiles as a thin plane. For this reason, it was inapplicable to the textiles which have the feature in surface form. In this research, textiles were regarded as a thick solid structure. The research also dealt with the method of carrying out the simulation of the surface form.
    It has been thought that the surface height of yarn in textiles is influenced by the length of the float yarn. However, as a result of measuring the form of the textile surface using noncontact form measurement equipment, it became clear that the height of yarn is not decided by the length of a float yarn. It is instead decided by the state of the weave in the weaving point circumference and the distribution of float yarn in the large range.
    Based on these experiment results, a weave figure for surface form was drawn. By applying this formula to computer simulation technology, a system that displays the surface form of textiles in an instant becomes a reality.
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  • Daisuke MORI, Toshiyasu KINARI, Sukenori SHINTAKU, Shigekazu NAKAGOSHI
    Article type: Others
    Subject area: Others
    2004 Volume 57 Issue 1 Pages T7-T12
    Published: 2004
    Released on J-STAGE: June 03, 2005
    JOURNAL FREE ACCESS
    In the preparing process for two-for twisting by using a pirn winder, a hysteresis tenser, in which the distance between a pair of permanent magnet discs is compensated, have been used to maintain filament yarn tension in a constant level. By this method, however, it is difficult to compensate abrupt changes of yarn tension. In this report, we have designed the tension control system which is composed of a tension sensor, a tenser device and a personal computer. The tenser device was developed by the use of an electromagnetic coil, a revolving roller coated with magnetic material, and a separate roller to wind yarn in screw. This control system was evaluated as a tension controlled experiment for a pirn winder. As the results of experiments, it is possible for this system to control filament yarn tension within deviation ±3cN to set the tension value 20∼60cN under 200∼600m/min in yarn speed. And we confirmed that this tension control system by using fuzzy theory has excellent tension control ability in transition characteristics for a pirn winder and this system by using PID control theory has excellent stability compared with hysteresis tenser.
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