Mechanical Characteristics of Magnet Spinning Rings

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The magnet spinning ring is a recent invention in Japan, and is an original twisting and winding appratus for fine spinning machines. The magnet ring is obviously aimed at a higher spindle speed, because the spindle speed has been limited by friction and wear in the ring-traveller mechanism. <BR> This article is an attempt to explain and analyze the basic mechanical characteristics of the magnet spinning ring, which consists of two elements : an outer ring of magnet, and an inner ring as a pole piece in the shape of a thin cylinder suspended magneticaly within the outer ring.<BR> In this article we consider the inner ring a main mechanical element and investigate its motion experimentally and analyze it theoretically. The inner ring in operation makes very regular rolling motions on the inside surface of the outer ring in a horizontal plane. The rolling motions make whirling motions in the inner ring shaft about the spindle shaft, and agree well with the results of the theoretical analysis.<BR> In order to attain the object of increase in spindle speed, it is concluded from this study that advancement of magnetic stability and decrease of magnetic adhesive force are important.
社団法人日本繊維機械学会の論文