Fibers and Polymers

, Volume 9, Issue 6, pp 747–754 | Cite as

Effect of processing conditions on warpage of film insert molded parts

  • Soo Jin Baek
  • Seong Yun Kim
  • Seung Hwan Lee
  • Jae Ryoun Youn
  • Sung Hee Lee
Article

Abstract

In order to investigate effects of injection molding conditions on viscoelastic behavior and thermal deformation of film insert molded (FIM) parts, injection molding was performed with various conditions such as injection speed, melt temperature, and packing time. It was shown that variation of the warpage was decreased monotonically with increasing injection speed and exhibited a bell-shaped curve as a function of melt temperature. Warpage variation was not affected by the packing time significantly and the proportional relationship between warpage of the film insert molded part and shrinkage of the injection molded part without film was observed. The FIM specimens produced with unannealed films showed the warpage reversal phenomenon (WRP) during annealing and the magnitude of reversed warpage was affected significantly by the injection parameters and the extent of thermal shrinkage of the unannealed film. Warpage of the FIM specimen was predicted by three dimensional numerical flow and stress analyses and the predicted values showed a good agreement with the experimental results.

Keywords

Annealing Injection molding Shrinkage Viscoelastic behavior Warpage 

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References

  1. 1.
    Y. W. Leong, M. Kotaki, and H. Hamada, J. Appl. Polym. Sci., 104, 2100 (2007).CrossRefGoogle Scholar
  2. 2.
    Y. W. Leong, U. S. Ishiaku, M. Kotaki, H. Hamada, and S. Yamaguchi, Polym. Eng. Sci., 46, 1674 (2006).CrossRefGoogle Scholar
  3. 3.
    S. Yamaguchi, Y. W. Leong, T. Tsujii, M. Mizoguchi, U. S. Ishiaku, and H. Hamada, J. Appl. Polym. Sci., 98, 294 (2005).CrossRefGoogle Scholar
  4. 4.
    Y. W. Leong, S. Yamaguchi, M. Mizoguchi, H. Hamada, U. S. Ishiaku, and T. Tsujii, Polym. Eng. Sci., 44, 2327 (2004).CrossRefGoogle Scholar
  5. 5.
    O. Denizart, M. Vincent, and J. F. Agassant, J. Mater. Sci., 30, 552 (1995).CrossRefGoogle Scholar
  6. 6.
    S. C. Lee and J. R. Youn, J. Reinf. Plast. Compos., 18, 186 (1999).Google Scholar
  7. 7.
    J. H. Jung, S. W. Lee, and J. R. Youn, Macromol. Symp., 148, 263 (1999).Google Scholar
  8. 8.
    S. H. Kim, C. H. Kim, H. Oh, C. H. Choi, B. Y. Kim, and J. R. Youn, Korea-Austr. Rheol. J., 19, 183 (2007).Google Scholar
  9. 9.
    K.-T. Chiang, Mater. Des., 28, 1851 (2007).Google Scholar
  10. 10.
    S. J. Liao and W. H. Hsieh, Polym. Eng. Sci., 44, 2029 (2004).CrossRefGoogle Scholar
  11. 11.
    B. Fan, D. O. Kazmer, W. C. Bushko, R. P. Theriault, and A. J. Poslinski, J. Polym. Sci., Polym. Phys., 41, 859 (2003).CrossRefGoogle Scholar
  12. 12.
    K. K. Kabanemi, H. Vaillancourt, H. Wang, and G. Salloum, Polym. Eng. Sci., 38, 21 (1998).CrossRefGoogle Scholar
  13. 13.
    M. Akay, S. Ozden, and T. Tansey, Polym. Eng. Sci., 36, 1839 (1996).CrossRefGoogle Scholar
  14. 14.
    H. Kikuchi and K. Koyama, Polym. Eng. Sci., 36, 1317 (1996).CrossRefGoogle Scholar
  15. 15.
    R. Y. Chang and B. D. Tsaur, Polym. Eng. Sci., 35, 1222 (1995).CrossRefGoogle Scholar
  16. 16.
    K. Djurner, J. Kubát, and M. Rigdahl, Polymer, 18, 1068 (1977).CrossRefGoogle Scholar
  17. 17.
    J. Kubát and M. Rigdahl, Polymer, 16, 925 (1975).CrossRefGoogle Scholar
  18. 18.
    M.-C. Huang and C.-C. Tai, J. Mater. Proces. Technol., 110, 1 (2001).CrossRefGoogle Scholar
  19. 19.
    D.-S. Choi and Y.-T. Im, Compos. Struct., 47, 655 (1999).CrossRefGoogle Scholar
  20. 20.
    S. Y. Kim, H. J. Oh, S. H. Kim, C. H. Kim, S. H. Lee, and J. R. Youn, Polym. Eng. Sci., 48, 1840 (2008).CrossRefGoogle Scholar
  21. 21.
    C. W. Macosko, “Rheology: Principles, Measurements, and Applications”, Wiley-VCH, New York, 1994.Google Scholar
  22. 22.
    P. Kennedy, “Flow Analysis Reference Manual”, Moldflow Pty. Ltd., Australia, 1993.Google Scholar
  23. 23.
    N. Santhanam, H. H. Chiang, K. Himasekhar, P. Tuschak, and K. K. Wang, Adv. Polym. Tech., 11, 77 (1991/1992).CrossRefGoogle Scholar
  24. 24.
    W. Flügge, “Viscoelasticity”, Springer-Verlag, Berlin, 1975.Google Scholar
  25. 25.
    “Analysis User’s Manual”, Volume III, ABAQUS Inc., Rhode Island, 2003.Google Scholar
  26. 26.
    S. J. Hong, W.-R. Yu, J. H. Youk, and Y. R. Cho, Fiber. Polym., 8, 377 (2007).CrossRefGoogle Scholar
  27. 27.
    S. Y. Kim, S. H. Kim, H. J. Oh, S. H. Lee, S. J. Baek, J. R. Youn, S. H. Lee, and S. W. Kim, J. Appl. Polym. Sci., 111, 642 (2009).Google Scholar
  28. 28.
    S. Y. Kim, S. H. Lee, S. J. Back, and J. R. Youn, Macromol. Mater. Eng., DOI 10.1002/mame.200800193.Google Scholar
  29. 29.
    J. M. Fischer, “Handbook of Molded Part Shrinkage and Warpage”, p.84, Norwich, New York, 2003.Google Scholar
  30. 30.
    D. V. Rosato and D. V. Rosato, “Injection Molding Handbook”, 2nd ed., pp.79–80, Chapman & Hall, New York, 1995.Google Scholar
  31. 31.
    S. Aasetre and E. Andreassen, “ANTEC’ 99 Conference Proceedings”, Vol. 3, pp.3931–3935, Society of Plastics Engineer Inc., Brookfield, 1999.Google Scholar
  32. 32.
    Plastics Institute of America, “Plastics Engineering Manufacturing and Data Handbook”, Vol. 1, pp.939–940, Kluwer Academic Publishers, Boston, 2001.Google Scholar

Copyright information

© The Korean Fiber Society and Springer-Verlag Berlin Heidelberg GmbH 2008

Authors and Affiliations

  • Soo Jin Baek
    • 2
  • Seong Yun Kim
    • 2
  • Seung Hwan Lee
    • 2
  • Jae Ryoun Youn
    • 2
  • Sung Hee Lee
    • 1
    • 2
  1. 1.Precision Molds and Dies TeamKorea Institute of Industrial TechnologyIncheonKorea
  2. 2.Research Institute of Advanced Materials (RIAM), Department of Materials Science and EngineeringSeoul National UniversitySeoulKorea

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