Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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A study on carbon composite fabrication using injection/compression molding and insert-over molding

사출/압축 공정과 인서트 오버몰딩을 이용한 탄소복합소재 성형에 대한 연구

  • Jeong, Eui-Chul (Department of Shape Manufacturing R&D, Korea Institute of Industrial Technology) ;
  • Yoon, Kyung-hwan (Department of Mechanical Engineering, Dankook University) ;
  • Hong, Seok-Kwan (Department of Shape Manufacturing R&D, Korea Institute of Industrial Technology) ;
  • Lee, Sang-Yong (Department of Shape Manufacturing R&D, Korea Institute of Industrial Technology) ;
  • Lee, Sung-Hee (Department of Shape Manufacturing R&D, Korea Institute of Industrial Technology)
  • 정의철 (한국생산기술연구원 형상제조연구부문) ;
  • 윤경환 (단국대학교 기계공학과) ;
  • 홍석관 (한국생산기술연구원 형상제조연구부문) ;
  • 이상용 (한국생산기술연구원 형상제조연구부문) ;
  • 이성희 (한국생산기술연구원 형상제조연구부문)
  • Received : 2020.08.06
  • Accepted : 2020.12.31
  • Published : 2020.12.31
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Abstract

In this study, forming of carbon composite parts was performed using an injection/compression molding process. An impregnation of matrix is determined by ability of wet and flow rate between the matrix and reinforcement. The flow rate of matrix passing through the reinforcements is a function of permeability of reinforcement, a viscosity of matrix and pressure gradient on molding, and the viscosity of the matrix depends on the mold temperature, molding pressure and shear strain of matrix. Therefore, compression molding experiment was conducted using a heating mold in order to confirm the possibility of matrix impregnation. The impregnation of the matrix through the porosities between the woven yarns was confirmed by the cross-sectional SEM image of compression molded parts. An injection molding process was also performed at a short cycle time, high molding pressure and low mold temperature than those of compression experiment conditions. Deterioration of impregnation on the surface of molded parts were caused by these injection conditions and it could be the reason of decreasing the maximum tensile strength. In order to improve impregnation of matrix on the surface, injection/compression molding and insert-over molding were applied. As a result of applying injection/compression molding and insert-over molding, it was shown that the improvement of impregnation on the surface and the maximum tensile strength was increased about 2.8 times than the virgin matrix.

Keywords

Acknowledgement

본 연구는 한국생산기술연구원 중소중견기업 생산기술 실용화 및 기술자원사업의 신시장창출지원사업(PJE20028)에 의해 수행되었으며, 이에 관계자 여러분께 감사드립니다.

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