Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지

Transcription Mechanism of Minute Surface Pattern in Injection Molding

  • YASUHARA Toshiyuki (Tokyo Institute of Technology, Mechanical Engineering and Science, Department of Mechanical Science and Engineering, Tokyo Institute of Technology) ;
  • KATO Kazunori (Department of Mechanical Engineering, Shonan Institute of Technology) ;
  • IMAMURA Hiroshi (Tokyo Institute of Technology, Mechanical Engineering and Science, Department of Mechanical Science and Engineering, Tokyo Institute of Technology) ;
  • OHTAKE Naoto (Tokyo Institute of Technology, Mechanical Engineering and Science, Department of Mechanical Science and Engineering, Tokyo Institute of Technology)
  • Published : 2003.04.01
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Abstract

In injection molding of an optical disk, a toric lens, etc., their performance depends on the transcription preciseness of fine surface structure of a mold. However, transcription behavior has not been made clear yet, because transcription is made in very short time and the structure is very small. In this paper, transcription properties have been examined, by using V-grooves of various sizes. machined on mold surfaces, and the following results are obtained. (1) Transcription properties have been made clear experimentally and it was found that the mold temperature $T_D$ makes great influence on the transcription property and that compression applying time $t_c$ should be taken more than 2.0s for fine transcription. (2) A mechanical model of transcription process, in consideration with strain recovery due to viscoelastic property of polymer. is proposed. (3) Simulation results agree with experimental ones fairly well. It means that the transcription model is useful for estimation of transcription property in advance of an actual. injection molding.

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