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A Study of Super Precise Injection Molding Technique Assisted by Radiation Energy

Research Project

Project/Area Number 08555052
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Thermal engineering
Research InstitutionTHE UNIVERSITY OF ELECTRO-COMMUNICATIONS (1997-1998)
Tokyo Institute of Technology (1996)

Principal Investigator

KUROSAKI Yasuo  The University of Electro-Communications, Faculty of Electro-Communications Professor, 電気通信学部, 教授 (70016442)

Co-Investigator(Kenkyū-buntansha) NISHIO Taichi  Sumitomo Chemical Co., Ltd., Plastic Technical Center Group Manager, 樹脂開発センター, グループマネージャー
FUSHINOBU Kazuyoshi  Tokyo Institute of Technology, Faculty of Engineering Research Associate, 工学部, 助手 (50280996)
TAKEUCHI Masaaki  Toin University of Yokohama, Faculty of Engineering Associate Professor, 工学部, 助教授 (70163384)
SATOH Isao  Tokyo Institute or Technology, Faculty of Engineering Associate Professor, 工学部, 助教授 (10170721)
山田 純  山梨大学, 工学部, 助教授 (40210455)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥18,800,000 (Direct Cost: ¥18,800,000)
Fiscal Year 1998: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 1997: ¥6,100,000 (Direct Cost: ¥6,100,000)
Fiscal Year 1996: ¥8,600,000 (Direct Cost: ¥8,600,000)
KeywordsPolymer Materials / Injection Molding Process / Radiation / Radiation Absorption Coefficient / Zinc-selenide / Birefringence / Transcription Ability / Flow Length / 赤外ふく射エネルギ / ハロゲンランプ / 耐熱ガラス / 薄肉成形品 / 樹脂充填性 / 射出成形 / ふく射エネルギー / 超高精度成形技術 / YAGレーザー / 表面転写性 / 成形限界 / 炭酸ガスレーザー / 冷却制御 / 残留複屈折
Research Abstract

In this research project, usage of infrared radiation energy was proposed to significantly improve the total quality of the injection molded polymer products. CO2 laser provided from the outside of the mold cavity was introduced through an optically transparent window of Zinc-selenide installed in the mold to prevent temperature drop of the molded polymer melt during the filling stage. Feasibility and effectiveness of this method was investigated and discussed through the experimental molding as well as the numerical heat transter analysis. In the first year, improvement of the residual birefringence (one kind of optical strain) in the products and transcription ability on product surface was experimentally studied by using the method. In the second year, temperature distribution within the molded polymer melt under irradiated was numerically estimated to make the characteristics clear, and improvement of the flow limitation in a thin flow path was experimentally studied. In the third year (final year), thin disk molding that simulates the practical process was performed according to the results obtained in the previous two years to give a general discussion for this method. And usage of a halogen lamp was tried and studied to propose a cheaper system that seemed to be desirable for the practical use. The results obtained in this research project are summarized as below :
1. This method can significantly decrease the residual birefringence within the products.
2. This method can considerably improve the transcription ability on the molded polymer surface that followed the fine mold wall geometry.
3. This method can maintain flow ability in a quite thin flow path.
4. This method can realize above advantages without considerable elongation of the process cycle time.
5. This method can be achieved with some other radiation source by choosing appropriate molding material and transparent mold window.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 黒崎、晏夫: "赤外ふく射支援による精密射出成形法に関する研究(第1報、炭酸ガスレーザー照射を利用した新射出成形法による樹脂成形品の高品位化)" 日本機械学会論文集(C編). 62・599. 2864-2871 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 斉藤、卓志: "ふく射加熱を用いた薄板あるいは微細形状を有する成形品の成形" 第8回プラスチック成形加工学会年次大会講演論文集. 69-72 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kurosaki, Yasuo: "Injection-Molding Process for High-Precision Polymer Products Utilizing CO2 Laser Irradiation" Proc.int.Symp.on Molecular and Microscale Heat Transfer in Materials Processing and Other Applications. 351-362 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 斉藤、卓志: "赤外ふく射支援による精密射出成形法に関する研究(第2報, 計算機シミュレーションによる樹脂内および金型内温度分布の予測)" 日本機械学会論文集(B編). 63-613. 3114-3122 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 斉藤、卓志: "赤外ふく射支援による薄肉射出成形品の充填性の改善" 成形加工. (掲載決定). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kurosaki, Yasuo: "Precision Injection Molding Assisted by Infrared Radiation (Quality Improvement of Polymer Products by CO2 Laser-Assisted Injection Molding Process)" Transactions of the Japan Society of Mechanical Engineers C. Vol.62-599. 2864-2871 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Saito, Takushi: "Injection Molding Process of Thin or Fine Shaped Products Assisted by Radiation Heating" Proceedings of the Japan Society of Polymer Processing International and Annual Conference '96. 69-72 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kurosaki, Yasuo: "Injection-Molding Process for High-Precision Polymer Products Utilizing CO2 Laser Irradiation" Proceedings of International Symposium on Molecular and Microscale Heat Transfer in Materials Processing and Other Applications. 351-362 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Saito, Takushi: "Precision Injection Molding Process Assisted by Infrared Radiation (2nd Report, Prediction of Temperature Distribution within Polymer and Mold by Numerical Simulation)" Transactions of the Japan Society of Mechanical Engineers B. Vol.63-613. 3114-3122 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Saito, Takushi: "Flow-ability Improvement for Thin Injection Molded Products by Infrared Irradiation" Transactions of the Japan Society of Polymer Processing. (process in publication, ). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 斉藤、卓志: "赤外ふく射加熱支援による薄肉射出成形品の充填性の改善" 成形加工. (掲載決定). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yasuo Kurosaki: "Injection-Molding Process for High-Precision Polymer Products Utilizing CO2 Laser Irradiation" Proc.Int.Symp.on Molecular and Microscale Heat Transfer in Materials Processing and Other Applications. 351-362 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 斉藤 卓志: "赤外ふく射支援による精密射出成形法に関する研究(第2報,計算機シミュレーションによる樹脂内および金型内温度分布の予測)" 日本機械学会論文集(C編). 63-613. 3114-3122 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 伏信 一慶: "極短パルスレーザー光照射を受けるシリコン薄膜の伝熱解析" 日本機械学会論文集B編. 63-609. 1741-1746 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yasuo Kurosaki: "A Heat Transfer Approach to Precision Polymer Molding Process:Injection Molding Process Assisted by Infrared irradiation" Proc.the 4th World Conference on Experimental Heat Transfer,Fluid Mechanics and Thermodynamics. 1. 319-326 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 黒崎 晏夫: "赤外ふく射支援による精密射出成形法に関する研究(第1報、炭酸ガスレーザー照射を利用した新射出成形法による樹脂成形品の高品位化)" 日本機械学会論文集(C編). 62-599. 348-355 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 斉藤 卓志: "ふく射加熱を用いた薄板あるいは微細形状を有する成形品の成形" 第8回プラスチック成形加工学会年次大会講演論文集. 69-72 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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