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Volume 9, Issue 4
Displaying 1-4 of 4 articles from this issue
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Haruo Sanuki1963 Volume 9 Issue 4 Pages 160-166
Published: 1963
Released on J-STAGE: May 15, 2006
JOURNAL FREE ACCESSTo analyse the fundamental mechanism of the drying process, the author has studied experimentally the effects which the degree of porosity (degree of opening) in wool assemblies have on the efficiency of their drying.
Wool assemblies of the same weight but of different degrees of porosity (Ph) were dried under a steady condition. The experiment has shown that, in the range of Ph=7097%, the relation between the porosity degree and the rate of drying is not proportional and that the rate of drying is the smallest for Ph=90%. The reason for this anomaly in the order of Pacan be explained in terms of the degree of the flow of the air current through a wool assembly.
The drying mechanism of a wool assembly having an extremely large degree of porosity (Ph=9599%) was also investigated. Furthermore, the author investigated experimentally the relation between the output and the porosity degree of a treated wool assembly on a jet-type drying machine.View full abstractDownload PDF (12701K) -
Part 3 : Construction of a High-Speed CardTakuzo Tooka, Masayuki Kitta, Hirokazu Yamamoto1963 Volume 9 Issue 4 Pages 167-176
Published: 1963
Released on J-STAGE: May 15, 2006
JOURNAL FREE ACCESSFewer nep slivers are obtained from a card equipped with metallic card clothing than from a card equipped with the conventional wire fillet clothing. A combination of metallic card clothing with a larger tooth angle on the cylinder and metallic card clothing with a smaller tooth angle on the doffer reduces neps and impurities in the sliver. These facts are related to the fiber density on the cylinder surface. We considered this relation and the cleaning action in the lickerin part, and made sure that increases in the speeds of all parts of a card equipped with metallic card clothing would increase production and improve sliver quality. Then we designed and built a new card which had various features, including smaller diameters and higher speeds of the lickerin roll, the cylinder, and the doffer, and the use of pneumatic devices and stationary flats. Spinning tests proved that production could be raised fivefold with no lowering of the quality of the sliver or yarn, and that wastes, the floor space and labor could be reduced considerably.View full abstractDownload PDF (18631K) -
Part 2 : Separating Specular RefIection from Diffuse ReflectionM. Uno, H. Saito, A. Shimoi, A. Koide1963 Volume 9 Issue 4 Pages 177-184
Published: 1963
Released on J-STAGE: May 15, 2006
JOURNAL FREE ACCESSThe specular and diffuse components of a reflection from a sliver, which bear closely on the optically measured degree of fiber orientation, have been studied from both theoretical and practical points of view, and the application of the results obtained to the device of measuring the degree of fiber orientation in a sliver was explained. The results are :
1) A reflection from a sliver can be separated into the specular and diffuse components by using a polarized incident light and by observing the reflection through analyzers.
2) A reflection from cotton slivers is composed chiefly of diffuse components, and the specular component is only 1/20 or 1/30 of the total reflection. The ratio of the diffuse to specular components depends on the kind of fibers.
3) It is, therefore, reasonable to define the degree of fiber orientation by specular components only.
4) Measurement can be simplified by using only one polarized plane to obtain the specular component on one plane. The specular component which is on the same plane but whose polarized axis is vertical to the first polarized plane can be calculated theoretically.
5) It is possible to observe continuously the degree of fiber orientation of a running sliver if a rotating polarizer is placed on the incident-light side and fixed analysers on the reflection-sides, and only the specular components are picked up.View full abstractDownload PDF (13620K) -
Yoshiharu Mukai1963 Volume 9 Issue 4 Pages 185-189
Published: 1963
Released on J-STAGE: May 15, 2006
JOURNAL FREE ACCESSAbstract The jumping of nylon flocks in the electric field has been investigated quantita- tively with a photo density meter, a leakage resistance meter. The results are:
1) The flying ability of flocks in the electric field under a given electric stress begins to increase at a leakage resistance of about 1011 and continues to rise rapidly as the leakage resistance decreases. However, the jumping ability reaches a sa.turation point when the leakage resistance is about 109.
2) The flying density of flocks changes in proportion to the separability of fibers if the jumping ability is the same.View full abstractDownload PDF (9137K)
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