Seikei-Kakou
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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Volume 9, Issue 2
Displaying 1-15 of 15 articles from this issue
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Index
Preface : Special Issue on Global Competitiveness of Japanese Mold Technology
Technical Note : Special Issue on Global Compelitiveness of Japanese Mold Technology
Technical Reports
Views of Processing Technique
Memoir
Special Lecture
Reports of International Meeting
Original Papers
  • Numerical Simulation of Heat Transfer and Crystallization of Non-Newtonian Flow in a Two-dimensional Flat Channel
    Masami TANIGUCHI, Yoshiaki AOKI, Yasuhiko HIRAO, Toshio AIHARA
    1997 Volume 9 Issue 2 Pages 162-168
    Published: February 20, 1997
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.4325/seikeikakou.9.162
    JOURNAL FREE ACCESS
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    Solidification process of molten polymer flowing in a two-dimensional flat channel was simulated with a numerical simulation program developed by considering non-Newtonian flow and crystallization simultaneously. In our crystallization model, effects of non-isothermal, convective, and stress-induced crystallization kinetics were taken into account. The effect of the cooling wall temperature on the velocity distribution and the formation of the skin layer is predicted. The skin layer becomes thicker along the flow direction, owing to the development of a temperature boundary layer, though the skin layer and the temperature boundary layer are not analogical. The skin layer thickness is predicted to be greater with mass velocity under the same cooling wall temperature. Simulated skin layer thickness, affected by stress-induced crystallization in a strong viscous shear flow, agreed with experimental data.
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  • Theoretical Study on Performance of a Twin Screw Extruder
    II. Three Dimensional Flow Analysis in an Intermeshing Counter-rotating Twin Screw Extruder with Circulation Flow
    Lijie LIU, Hisamitsu HIGASHI, Yuki NAGASHIMA, Toshihisa KAJIWARA, Kazu ...
    1997 Volume 9 Issue 2 Pages 169-175
    Published: February 20, 1997
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.4325/seikeikakou.9.169
    JOURNAL FREE ACCESS
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    We have developed a prediction technique for the three-dimensional flow field in the melt conveying zone in intermeshing counter-rotating twin screw extruders with circulation flow by the finite element method. We obtained the details of the velocity and stress fields for the full flight screw and the relationship between circulation flow rates and the screw configurations. It was found that circulation flow rates become large with increasing flight width and decreasing calender gap. We also obtained the spatial distribution, residence time distribution and history of maximum shear stress using a numerical tracer experiment.
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Reports from Universities and Institutions in Japan
Reports from Oversea Universities and Institutions
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