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Advanced mold condition control to elucidate the mechanism of injection molded direct joining

Research Project

Project/Area Number 19K14859
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 18020:Manufacturing and production engineering-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kimura Fuminobu  東京大学, 生産技術研究所, 助教 (10739311)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords異材接合 / 金属樹脂直接接合 / 射出成形 / 表面処理 / 接合メカニズム / 金属樹脂接合 / 金型温度制御 / 微細構造 / 金属・樹脂直接接合 / 型温動的制御 / 金属/樹脂直接接合 / 金型状態制御 / 界面分析
Outline of Research at the Start

表面に微細な構造を有する金属に対して,射出成形によって溶融樹脂を流し込むことで,射出成形金型内で金属と樹脂を直接接合させることができる.本研究では,射出成形中の樹脂状態が接合特性に与える影響を明らかにすることを目的とする.
まず,射出成形中の樹脂状態を変化させることを可能にするため,型内状態を制御可能な金型の開発を行う.制御する型内状態としては,流動形状や温度分布の時間変化などを検討する.そして,この状態制御可能な金型を用いて,樹脂状態が接合特性とどのような関係にあるかを調査する.

Outline of Final Research Achievements

A surface fine-structured metal workpiece can be joined with an injection molded polymer component. The joining is formed in a mold during an injection molding process. This study investigated effects of an advanced control of a mold condition on a joining performance. First, the mold that can dynamically control temperature distribution was developed. Then the experiments were carried out by using the developed mold. The results showed; (1) dynamic temperature control can enhance joining strength and process efficiency; (2) temperature distribution control can enhance process efficiency; (3) the local temperature at the metal/polymer interface can be significantly important for the joining occurrence, which was derived from the distribution control.

Academic Significance and Societal Importance of the Research Achievements

本研究で取り扱った直接接合技術は,比較的新しい技術であり,厳密な接合メカニズムは未解明という問題はあるが,生産性の高さや自由度の高さから産業応用および将来の基盤技術となることが非常に期待されている.本研究で得られた成果は,接合特性の向上や生産プロセスの高効率化の指針となり,本接合技術の社会実装を進める上で必要不可欠なものになると考えられる.また,接合を発現する上で重要な要素を示唆できたことから,本研究で開発した技術は接合現象の解明を進める上で必要なツールになると考えられる.

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (10 results)

All 2021 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Structure size effect on polymer infiltration in injection molded direct joining2021

    • Author(s)
      Kadoya Shotaro、Kimura Fuminobu、Yanagishita Takashi、Kajihara Yusuke
    • Journal Title

      Precision Engineering

      Volume: 67 Pages: 100-109

    • DOI

      10.1016/j.precisioneng.2020.09.017

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chemical interaction at the interface of metal?plastic direct joints fabricated via injection molded direct joining2021

    • Author(s)
      Zhao Shuaijie、Kimura Fuminobu、Wang Shuohan、Kajihara Yusuke
    • Journal Title

      Applied Surface Science

      Volume: 540 Pages: 148339-148339

    • DOI

      10.1016/j.apsusc.2020.148339

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Manufacturing aluminum/polybutylene terephthalate direct joints by using hot water?treated aluminum via injection molding2020

    • Author(s)
      Zhao Shuaijie、Kimura Fuminobu、Yamaguchi Eiji、Horie Nayuta、Kajihara Yusuke
    • Journal Title

      The International Journal of Advanced Manufacturing Technology

      Volume: 107 Issue: 11-12 Pages: 4637-4644

    • DOI

      10.1007/s00170-020-05364-0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Formation of boehmite crystals on microblasted aluminum surface to enhance performance of metal-polymer direct joining2020

    • Author(s)
      Fuminobu Kimura, Eiji Yamaguchi, Nayuta Horie, Gota Suzuki, and Yusuke Kajihara
    • Journal Title

      Materials Letters

      Volume: 260 Pages: 126963-126963

    • DOI

      10.1016/j.matlet.2019.126963

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Experimental analysis on mechanical interlocking of metal-polymer direct joining2020

    • Author(s)
      Shuaijie Zhao, Fuminobu Kimura, Shotaro Kadoya, and Yusuke Kajihara
    • Journal Title

      Precision Engineering

      Volume: 61 Pages: 120-125

    • DOI

      10.1016/j.precisioneng.2019.10.009

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 成形接合における型温分布が接合強度に与える影響2021

    • Author(s)
      木村文信,梶原優介
    • Organizer
      プラスチック成形加工学会第31回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ナノスケール構造を用いた金属-透明樹脂成形接合2020

    • Author(s)
      竹内暁人,木村文信,門屋祥太郎,梶原優介
    • Organizer
      プラスチック成形加工学会成形加工シンポジア'20
    • Related Report
      2020 Annual Research Report
  • [Presentation] Efficiency improvement for injection molded direct joining by dynamic control of mold temperature2020

    • Author(s)
      Fuminobu Kimura and Yusuke Kajihara
    • Organizer
      euspen's 20th International Conference & Exhibition
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 急加熱・急冷却金型が成形接合の接合強度および効率に与える影響2020

    • Author(s)
      木村文信,梶原優介
    • Organizer
      プラスチック成形加工学会第31回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Dynamic control of mold temperature for metal-plastics direct joining using injection molding2019

    • Author(s)
      Fuminobu Kimura and Yusuke Kajihara
    • Organizer
      The 8th International Conference of Asian Society for Precision Engineering and Nanotechnology
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2022-01-27  

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