한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제26권3호
  • /
  • Pages.98-102
  • /
  • 2009
  • /
  • 1225-9071(pISSN)
  • /
  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

균형충전을 위한 HR3P 금형 구조에서의 공정의 최적화

Optimization of Processing on Filling Balance of the HR3P Mold Structure

  • Kwon, Youn-Suk (Graduated School of Department of Mechanical Engineering, Pukyung Univ.) ;
  • Jeong, Yeong-Deug (Department of Mechanical Engineering, Pukyung Univ.)
  • 발행 : 2009.03.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Almost all injection molds have multi-cavity runner system for mass production, which are designed with geometrically balanced runner system in order to accomplish filling balance between cavity to cavity during processing. However, even though geometrically balanced runner is used, filling imbalance has been observed. Filling imbalance could be decreased by modifying processing conditions such as injections rate, mold temperature, injection pressure, melt temperature that are related to shear, viscosity. In this study, a series of experiment was conducted to investigate filling imbalance variation when modifying runner layout and polymer and to determine which processing condition influences as the primary cause of filling imbalance in geometrically balanced runner system. The filling imbalance was decreased up to result range of $3{\leq}DFI{\leq}8(%)$ by using a new runner system for balanced filling.

키워드

참고문헌

  1. Beaumont, J. P., Young, J. H. and Jaworski, M. J., "Solving Mold Filling Imbalance in Multi-Cavity Injection Molding," Journal of Injection Molding Technology, Vol. 2, No. 2, pp. 47-58, 1998
  2. Casaldi, H. E. and Michel, T., "Process Window as Effected by Shear Induced Flow Imbalance in Multicavity Molds," ANTEC 2001, pp. 3112-3115, 2001
  3. Young, J. H. and Beaumont, J. P., "Mold Filling Imbalances in Geometrically Balanced Runner System," Journal of Injection Molding Technology, Vol. 1, No. 3, pp. 133-134, 1997
  4. Beaumont, J. P., Nagel, R. and Sherman, R., "Successful Injection Molding," Hanser, pp. 58-71, 2002
  5. Han, D. Y. and Jeong, Y. D., "Filling Imbalance of Elastomer TPVs in Injection Mold with Unary Branch Type Runner System," Journal of Korean Society of Precision Engineering, Vol. 25, No. 4, pp. 47-52, 2008
  6. Montgomery, D. C., "Design and Analysis of Experiments," John Wiley & Sons, pp. 218-246, 2001
  7. Lee, S. H., "Engineering statistics data analysis by using Minitab," Eretec Inc., pp. 727-775, 2006