Journal of Japan Foundry Engineering Society
Online ISSN : 2185-5374
Print ISSN : 1342-0429
ISSN-L : 1342-0429
Volume 85, Issue 9
Displaying 1-11 of 11 articles from this issue
Special Articles Foreword for Special Issue on Progress of Casting Equipment Research and Development in Recent Years
Research Articles
  • Yoshiyuki Noda, Atsushi Ito, Kazuhiko Terashima, Makio Suzuki, Kazuhir ...
    2013 Volume 85 Issue 9 Pages 574-583
    Published: September 25, 2013
    Released on J-STAGE: April 03, 2017
    JOURNAL FREE ACCESS

      This paper discusses with an advanced control system for tilting-ladle type automatic pouring machines used in metal-casting industry. In order to precisely pour the liquid outflow from a ladle into a sprue cup of a mold, a falling position control system of the outflow liquid is proposed in this paper. In the proposed approach, a mathematical model on the falling position of the outflow liquid is derived from the shape of the ladle and the pouring conditions. The proposed mathematical model is verified by the experiments using a system which monitors the trajectory of the outflow liquid. In this study, the pouring process to the ladle which has a pouring mouth with a flow guide was analyzed mathematically. The falling position of the outflow liquid was varied with the tilting angle of the ladle according to the effects of the flow guide. The results confirmed that the flow velocity of the liquid from the ladle is increased by the contraction of cross-section of the liquid. This means that the flow velocity estimated by the mathematical model must be compensated using the experimental data. This paper therefore proposed a compensation method. Based on the model analysis, the falling position control is constructed by feedforward control using the proposed falling position mathematical model. The effectiveness of the proposed control system was validated through the experiments using an automatic pouring machine with a monitoring system.

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