Journal of the Society of Powder Technology, Japan
Online ISSN : 1883-7239
Print ISSN : 0386-6157
ISSN-L : 0386-6157
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Volume 22, Issue 2
Displaying 1-5 of 5 articles from this issue
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  • Study on the Compaction of Fine Powder with Vibration
    Fumiaki TAKEUCHI, Shigenori FUKUDA, Kiyoshi YAMANAKA, Takeshi KANO
    1985 Volume 22 Issue 2 Pages 73-78
    Published: February 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.73
    JOURNAL FREE ACCESS
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    In general, many factors lead to a decline in the capacity of equipment packing fine powders. These factors are mostly due to the complicated properties of fine powders, such as adhesiveness, poor fluidity and dusting characteristics.
    This study was undertaken to investigate the rapid compaction of fine powder. The laboratory-size vibration equipment was set up, and the optimum frequency and amplitude were investigated.
    Three metal soaps were used as a sample. It was found that the vibration during packing was quite effective. Good compaction of fine powder was achieved in a short time period from 1/5 to 1/10 in comparison with no vibration. The optimum frequency varies with the height of the powder bed. When the height of the powder bed is high, the optimum frequency is low and vice versa.
    A higher amplitude, namely, a higher acceleration of vibration gives a better packing effect within the limits of this experiment.
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  • The Development of a Continuous Measuring System for the Degree of Mixing of Powders by an Optical Method
    Munetake SATOH, Yuichiro DEGUCHI, Syuji KOMURA, Kei MIYANAMI
    1985 Volume 22 Issue 2 Pages 79-84
    Published: February 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.79
    JOURNAL FREE ACCESS
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    A new system has been developed to measure the flow and mixing characteristics of powder mixers. The intensity of the changes of the reflected light from the mixture were measured continuously by a photometer with five sets of optical fiber probes located separately in the mixer vessel. The output signals were processed by an A/D converter and a microcomputer, and the concentration change with time and the degree of mixing at every moment were calculated and displayed on the VDT.
    The mixing performance for a high speed agitator-type mixer with a vibrating vessel was investigated by using the present system. The experimental results show that the optical measurement is accurate enough for practical usages, and the developed system is useful not only for evaluation of the mixing performance but also for the measurement of the surface condition of particles.
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  • [title in Japanese]
    Isao SUGIMOTO, Yoshiteru TAKAHASHI
    1985 Volume 22 Issue 2 Pages 85-97
    Published: February 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.85
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1985 Volume 22 Issue 2 Pages 110-117
    Published: February 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.110
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1985 Volume 22 Issue 2 Pages 118-121
    Published: February 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.118
    JOURNAL FREE ACCESS
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