Skip to main content
SpringerLink
Log in

Heat transfer in injection molding for reproduction of sub-micron-sized features

  • ORIGINAL ARTICLE
  • Published:
The International Journal of Advanced Manufacturing Technology Aims and scope Submit manuscript

Abstract

Heat transfer in injection molding was quantitatively measured with micro heat-flux sensors. The 0.1–10 micron-wide micro-grooves with aspect ratios of 0.5–1.0 were etched by focus ion beam on a Ni-plated mold. During the short time just after injecting, heat-flux in the mold was maximized to 10–50 W/cm2, and heat transfer coefficient between plastic and mold was 0.27 W/(cm2K) with PMMA and 0.085 W/(cm2K) with PS. The maximum mold surface temperature just after injecting should be above the glass transition temperature of plastic, then reproducing sub-micron-wide micro-ridges.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Yan C, Nakao M, Go T, Matsumoto K, Hatamura Y (2003) Injection molding for micro structures controlling mold-core extrusion and cavity heat-flux. Microsyst Technol 9:188–199

    Article  Google Scholar 

  2. Wang KK, Zhou J (2000) A concurrent engineering approach toward the online adaptive control of injection molding process. Annals of the CIRP 49/1:379–382

    Google Scholar 

  3. Nakao M, Yoda M, Nagao T (2003) Locally controlling heat flux for preventing micrometre-order deformation with injection molding of miniature products. Annals of the CIRP 52/1:451–454

    Article  Google Scholar 

  4. Guo LJ (2004) Recent progress in nanoimprint technology and its application. J Phys D: Appl Phys 37(2004):R123–R141

    Article  Google Scholar 

  5. Tsuchiya K, Nakao M (2005) Micro thermocouple array for measuring resin temperature in an injection mold. Journal of Japan Society for Precision Engineering 71/10:1255–1259

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Engineering Synthesis, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8656, Japan

    M. Nakao, T. Sadamitsu, Y. Ichikohara, T. Ohba & T. Ooi

  2. Institute of Industrial Science, The University of Tokyo, Komaba 4-6-1, Meguro-ku, Tokyo, 153-8505, Japan

    K. Tsuchiya

Authors
  1. M. Nakao
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. K. Tsuchiya
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. T. Sadamitsu
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Y. Ichikohara
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. T. Ohba
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. T. Ooi
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to M. Nakao.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Nakao, M., Tsuchiya, K., Sadamitsu, T. et al. Heat transfer in injection molding for reproduction of sub-micron-sized features. Int J Adv Manuf Technol 38, 426–432 (2008). https://doi.org/10.1007/s00170-007-1343-y

Download citation

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00170-007-1343-y

Keywords

Search

Navigation