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Development of Injection Molding of an High Density Optical Disk by Rapid Heating Stamper

Research Project

Project/Area Number 07555217
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field Material processing/treatments
Research InstitutionTokyo Institute of Technology

Principal Investigator

KATO Kazunori  Tokyo Institute of Technology, Department of Mechanical Engineering and Science, Professor, 工学部, 教授 (80016419)

Co-Investigator(Kenkyū-buntansha) YOSHII Masaki  HITACHI,Ltd.Production Engineering Research Laboratory, Senior Researcher, 生産技術研究所, 主任研究員
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥8,400,000 (Direct Cost: ¥8,400,000)
Fiscal Year 1996: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1995: ¥5,400,000 (Direct Cost: ¥5,400,000)
KeywordsInjection molding / Precise transcription / Nickel plated ceramic stamper / Direct current heating / Optical disk / 転写性向上 / 光ディスク / 転写性 / ニッケルメッキ / 急加熱スタンパ
Research Abstract

In injection molding of an optical disk, precise minute pit pattern is transcripted from that on a nickel stamper of 0.3mm thickness. However various defects, i.e.miss-transcription, multiple transcription, flow-mark, etc.are sometimes generated. These defects reduce with increasing die temperature, but cooling efficiency of a product decreases and molding cycle time become long. In this paper a model stamper, on which thin nickel film is plated and heated by direct current, is developed. Then, transcription behavior is examined. A rapid heating stamper model is made. Its size is 100mm in length, 10mm in width, and 5mm in thickness. A thin nickel layr of 10mum thickness is plated on AIN (aluminum nitride) ceramic plate and annealed at 400゚C temperature in 15 minutes. Then the surface is finished by buffing. Then Electrodes was put on its both ends and electric power of 10V and 12A is applied to the nikkel layr. Surface temperature is measured by thermo-couple. Temperature rise of 65゚C is obtained in 1.5 seconds after power-on and 50゚C temperature drop in 5 seconds after power-off. In injection molding with the model stamper, heat-starting time (t_0) and heat-holding tiem (DELTAt) are changed. "t_0=0" is defined as injection-starting time. On the surface of a stamper many fine scratches are observed. In injection molding without heating. transcription of scratch is not clear. It means that the transcription is incomplete. When appropriate heating is applied (t_0=-ls, DELTAt=2s), scratches are transcripted clearly. In the case of long heating (t_0=0s, DELTAt=3s), voids are generated because of high temperature.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 安原鋭幸,加藤和典,藤澤直樹,潮崎正一,大竹尚登: "通電加熱金型による射出成形の転写特性の研究" 日本機械学会第4回機械材料・材料加工技術講演会講演論文集. 96-39. 13-14 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安原鋭幸,加藤和典,藤澤直樹,潮崎正一,大竹尚登: "通電加熱スタンパによる射出成形の研究-加熱・冷却条件と流動特性-" プラスチック成形加工学会成形加工シンポジア'96講演予稿集. 1. 107-108 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安原鋭幸,加藤和典,藤澤直樹,潮崎正一,大竹尚登: "通電加熱スタンパによる射出成形の転写性に関する研究" プラスチック成形加工学会成形加工'96講演予稿集. 1. 193-194 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Toshiyuki YASUHARA,Kazunori KATO.Naoki FUJISAWA,Shouichi SHIOSAKI and Naoto OTAKE: "Transcription Property of Fine Surface Structue by Using Direct Current Heating Stamper in Injection Molding" Extended Abstracts of The 4th Materials and Processing Conference. 96-39. 13-14 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Toshiyuki YASUHARA,Kazunori KATO,Shoichi SHIOSAKI and Naoto OTAKE: "Transcription Property of Fine Surface Structure by Using Direct Current Heating Stamper in Injection Molding" Extended Abstracts of JSPP International and Annual Conference '96. vol.1. 193-194 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Toshiyuki YASUHARA,Kazunori KATO,Naoki FUJISAWA,Shouichi SHIOSAKI and Naoto OTAKE: "Melt Flow Property by Using Direct Current Heating Stamper in Injection Molding" Extended Abstracts of JSPP '96 Sympo.Papers.vol.1. 107-108 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安原鋭幸 加藤和典 潮崎正一 大竹尚登: "通電加熱スタンパによる射出成形の転写性に関する研究" 成形加工'96. 193-194 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 安原鋭幸 加藤和典 藤澤直樹 潮崎正一 大竹尚登: "通電加熱スタンパによる射出成形の研究 -加熱・冷却条件と流動特性-" 成形加工シンポジア'96. 107-108 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 安原鋭幸 加藤和典 藤澤直樹 潮崎正一 大竹尚登: "通電加熱金型による射出成形の転写特性の研究" 第4回機械材料・材料加工技術講演会講演論文集. 96-39. 13-14 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 加藤,安原: "光ディスク基板の射出成形における転写性について" 日本レオロジー学会高分子加工技術研究会. 前刷. (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 安原,加藤,潮崎,大竹: "通電加熱スタンパによる射出成形の転写性に関する研究" プラスチック成形加工学会講演予稿集. (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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