Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Improvement of Moldability for Ultra Thin-Wall Molding with Micro-Patterns

마이크로 패턴을 가진 초박육 사출성형의 성형성 개선

  • 윤재호 (한국생산기술연구원 열유체시스템팀) ;
  • 박근 (서울산업대학교 기계설계.자동화공학부) ;
  • 권오경 (한국생산기술연구원 열유체시스템팀)
  • Published : 2007.05.01
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Abstract

The rapid thermal response(RTR) molding is a novel process developed to raise the temperature of mold surface rapidly in the injection stage and then cool rapidly to the ejection temperature by air or water. The objectives of this paper are to investigate the effect of mold temperature, pressure and thickness of micro pattern molding and to provide a optimization of RTR injection molding for micro pattern from Moldflow simulation. Optimal minimum temperature and pressure was found without shortcut according to thickness. Filling percentage was influenced by glass transition temperature with the kinds of resin. Optimal temperature is slightly higher than glass transition temperature irrespectively of pressure, thickness, the kinds of resin in the micro pattern molding.

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References

  1. Yoo, Y. E., Seo, Y. H., Je, T. J. and Choi, D. S., 2005, 'Injection Molding Technology for Micro/Nano Pattern,' J Kor. Soc. Precision Engng., Vol. 22, pp. 23-29
  2. Yu, L., Koh, C. G., Lee, L. J. and Koelling, K. W,. 2002, 'Experimental Investigation and Numerical Simulation of Injection Molding with Micro-Features,' Polym. Eng. Sci., Vol. 42, pp. 871-888 https://doi.org/10.1002/pen.10998
  3. Kim, B. H. and Sub, N. P., 1986, 'Low Thermal Inertia Molding,' Polym. Plast. Technol. Eng., Vol. 25, pp. 73-93 https://doi.org/10.1080/03602558608070076
  4. Jansen, K. M. B. and Flaman, A. A. M., 1994, 'Construction of Fast-Response Heating Elements for Injection Molding Applications, Polym. Eng. Sci., Vol. 34, pp. 894-897 https://doi.org/10.1002/pen.760341105
  5. Yao, D. and Kim, B., 2002, 'Development of Rapid Heating and Cooling Systems for Injection Molding Applications, Polym. Eng. Sci., Vol. 42, pp. 2471-2481 https://doi.org/10.1002/pen.11133
  6. Yao, D. and Kim, B., 2002, 'Injection Molding High Aspect Ratio Microfeature,' J Injection Molding Tech., Vol. 6, pp. 11-17
  7. Park, K. and Kim, B., 2006, 'A Study on Improvement of Flow Characteristics for Thin-Wall Injection Molding by Rapid Mold Heating,' Trans. of Mat. Proces., Vol. 15, pp. 15-20 https://doi.org/10.5228/KSPP.2006.15.1.015
  8. Chiang., H. H. Hieber, C. A. and Wang, K. K., 1991, 'A Unified Simulation of the Filling and Post Filling Stages in Injection Molding,' Part I: Formulation, Polym. Eng. Sci., Vol. 31, pp. 116-124 https://doi.org/10.1002/pen.760310210
  9. Park, K. Ahn, J. H. and Choi, S. R., 2002, 'Application of Design of Experiments and Numerical Analysis to Optimal Design for Injection Molding Processes of Electrical Parts,' Trans. of the KSME(A), Vol. 26, No. 7, pp. 1348-1356

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