A Study on the Filling Pattern Imbalance by Width of Gate in the Thin Plate Injection Molding

박판 사출 성형에서 게이트 폭에 따른 충전 불균형에 대한 연구

  • 정태성 (인하공업전문대학 기계설계과) ;
  • 장진혁 ((주)코웨이 환경기술연구소) ;
  • 김종선 (한국생산기술연구원)
  • Received : 2016.12.26
  • Accepted : 2017.03.24
  • Published : 2017.03.31

Abstract

Recently, the injection-molded products are lighter, and thinner than ever. In this work, Injection molding simulation was conducted to analysis the filling pattern imbalance in high speed injection molding process for thin-wall injection component, 8 inches LGP. Numerical analysis shows that shear heated polymer near the side wall causes filling imbalance between center and side of cavity. Short shot experiments were conducted and compared with simulation results. Filling imbalance ratio showed a tendency to increase for wider fan gate.

Keywords

References

  1. 정태성, 김종선, 하석재, 조명우, "박형 도광판의 고속사출성형을 위한 수지 점도 측정 및 수치해석", 한국소성가공학회지, 제23권, 제1호, pp. 41-47, 2014.
  2. Tsai, M. H., Ou, K. L., Huang, C. F., Cheng, H. C., Shen, Y. K., Chang, C. Y., Wu, C. H., Chen, J. H. and Guan, P., "Study on micro-injection molding of light guiding plate by numerical simulation, International Communications in Heat and Mass Transfer", Vol. 35, pp. 1097-1100. 2008. https://doi.org/10.1016/j.icheatmasstransfer.2008.05.013
  3. Shen, Y. K., Wu, W. Y., Yang, S. Y., Jian, H. M. and Chen, C-C. A., "Study on numerical simulation and experiment of light guide plate in injection molding", Journal of Reinforced Plastics and Composites, Vol. 23, No. 11, pp. 1187-1206, 2004. https://doi.org/10.1177/0731684404037040
  4. Feng, C., Kuo, J. and Su, T. L., "Optimization of injection molding processing parameters for LCD Light Guide Plates", Journal of Materials Engineering and Performance, Vol. 16, pp. 539-548, 2007. https://doi.org/10.1007/s11665-007-9088-1
  5. 황철진, 김종선, 오정길, 정철, 안희정, 허영무, 김종덕, 윤경환, "박판(0.3mm) 도광판 성형을 위한 유압식 고속사출성형의 성형 안정성 연구", 한국소성가공학회지, 제17권, 제8호, pp. 657-661, 2008.
  6. 정태성, 장진혁, 김종선, "초박판 도광판의 고속 사출성에서 충전 불균형에 관한 연구", 폴리머, 제41권, 제1호, 게제중, 2016.