화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.22, No.3, 179-186, September, 2010
Export Citation
Numerical flow analysis on warpage of film insert molded parts with fiber reinforced polymer substrate
Seong Yun Kim, Jin Young Kim1, Sung Ho Kim, Seung Hwan Lee, Jae Ryoun Youn†, Sung Hee Lee2, and Kyeong Wung Kim3
  • Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, 151-744, Korea
  • 1Petrochemicals & Polymers R&D, LG Chem, Ltd, Moonji-Dong, Yuseong-Gu, Daejeon, 104-1, Korea
  • 2Precision Molds and Dies Team, Korea Institute of Industrial Technology, Songdo-Dong, Yeonsu-Gu, Incheon, 406-840, Korea
  • 3Cresin Co. Ltd, 1415-3, Moonbang-Ri, Seongju-Gun, Gyungsangbuk-Do, 719-834, Korea
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Non-uniform temperature distribution is developed in the thickness direction of the film insert molded (FIM) product during filling and cooling stages due to retardation of the heat transfer through the solid film. Since the non-uniform temperature distribution causes non-uniform shrinkage of the product after ejection and warpage is generated by the non-uniform shrinkage, warpage of the FIM specimen is larger than that of the injection molded specimen. A new mold design was suggested in this study in order to prevent warpage of FIM specimens. Warpage of FIM specimens obtained by using the new mold was smaller than that of FIM specimens obtained by using the conventional mold. Fiber reinforced polymer resins were also used as the substrate to prepare the FIM specimens. Warpage of the FIM specimens with the fiber composite substrate was reduced with increasing the fiber loadings. Warpage of the FIM specimens with carbon fiber (CF) reinforced PC (polycarbonate)/ABS (acrylonitrile-butadiene-styrene) blend was predicted by considering anisotropic material properties such as fiber orientation, thermal expansion coefficient, Poisson's ratio, and elastic modulus.
Keywords:carbon fiber;glass fiber;injection;warpage
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