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CAD of the Gating System of Thin Castings.

Research Project

Project/Area Number 59460079
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 機械工作
Research InstitutionChiba Institute of Technology.

Principal Investigator

CHIJIIWA Kenji  Chiba Institute of Technology., 工学部, 教授 (90010587)

Co-Investigator(Kenkyū-buntansha) KANAZAWA Kenichi  Chiba Institute of Technology., 工学部, 講師 (30169544)
MINAMI Kazuichiro  Chiba Institute of Technology., 工学部, 助教授 (80083814)
OOTA Eiichi  Chiba Institute of Technology., 工学部, 教授 (50083811)
Project Period (FY) 1984 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 1986: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1985: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1984: ¥2,600,000 (Direct Cost: ¥2,600,000)
KeywordsCAD system / casting product / mashy-state metal / 粘性抵抗
Research Abstract

This study presents a trial of CAD applied to thinning of casting product. At first the theoretical equations of multi-gating are analytically derived from Bernoulli's theorem. And casting process into a mold of a simple shape is graphically expressed. Effect of casting speed, ratio of ingate, and etc. on casting process, is experimentally investigated using water and the metal melted at low temperature. The result shows that each simulation leads to noticeable error, compared with the analytical result. Next, in order to obtain a relation between a coefficient of vicosity and a rate of solid phase in mashy-state metal of Al-(0-15%)Si alloy, experiment is carried out using the measuring appratus manufactured specially. It shows that a coefficient of viscousity radically increases at a rate above 30% and reaches <infinite> at 80%. Considering that the rate of solid is under 30% in usual casting, it is clear that a coefficient of viscousity at 0-30% is necessary for theoretical analysis.
By experiments in friction loss in a casting mold and loss caused by a variation in cross section, theoretical equation is modified. And rising process of surface in case of transe-verse flow in ununifom transverse cross section of a casting mold is researched theoretically and experimentally.
In conclusion a design for the bottom-gate can lead to CAD system, but method incorporating of a change of temperature at a top of flow and molding resistence into the equation, is insufficient. Also a falling gate is not considered in this study, but needs to be investi-gate in future.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 南和一郎,千々岩健児: 鋳物(日本鋳物協会). 58. 268-274 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 千々岩健児,金沢憲一,南和一郎: 鋳物(日本鋳物協会).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Kazuichiro Minami and Kenji Chijiiwa: "Flow Process in Multigating System." The Journal of Japan Foundrymen's Society. 58. 268-274 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Kenji Chijiiwa, Kenichi Kanazawa and Dazuichiro Minami: "Viscous Friction Under Coexisting State of Liguid and Solid of Al-Si Alloys." The Journal of Japan Foundrymen's Society revious Arrangement).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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