사출/압축 공정과 인서트 오버몰딩을 이용한 탄소복합소재성형에 대한 연구
A study on carbon composite fabrication using injection/compression molding and insert-over molding
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
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.
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.
참고문헌 (17)
- Cole, G. S., "Light weight materials for automotive applications", Mater. Charact, 35, pp.3~ (1995)
- Johnston, N. J., "High Performance Thermoplastic : A Review of Neat Resin and Composite Properties", SAMPE symp, Proc, 32nd Int, pp.1400~ (1987)
- 김기석, "자동차 경량화를 위한 탄소섬유강화 복합재료의 동향", 엘라스토머 및 콤포지트, 47(1), pp.65~74 (2012), 한국고무학회
- S. H. Lim, "High Performance Thermoplastic Composites", Polymer Science and Tecnology, 6(5), pp.451~458 (1995)
- Yip, H. L. H., "Characterisation of carbon fibres recycled from scrap composites using fluidised bed process", Plast. Rubber Compos. Process Appl, 31, pp.278~ (2002)
- S. T. Kim, "Development Trend for Thermoplastic Polymer Composite", Polymer Science and Technology, 24(1), pp.25~28 (2013)
- Korean Institute of Science and Technology, "Carbon fiber composite manufacturing technology", ~ (2011)
- Lim, T. C., "Axisymmetric Sheet Forming of Knitted Fabric Composite by Combined Stretch Forming and Deep Drawing", Composites : Part B, 30, pp.495~502 (1999)
- Nakamura, Y., "The Effect of Newly Developed Blank Holder on Press Forming of Glass-Cloth Reinforced Thermoplastic Sheet", Key Engineering Materials, 137, pp.40~46 (1998)
- Qin, S., "An the Extent of Stretching during Deep Drawing", Journal of Materials Processing Technology, 59(4), pp.386~390 (1996)
- 정의철, "사출성형용 열가소성 펠렛을 이용한 탄소섬유복합소재 제작에 관한 연구", 소성∙가공, 25(6), pp.402~408 (2016), 한국소성∙가공학회
- 정의철, "CFRTP 부품제조를 위한 금형 및 성형 기술에 대한 연구", Design & Manufacturing, 11(3), pp.25~28 (2017), 한국금형공학회
- I. Y. Chang, "Recent Development in Thermoplastic Composites : A Review of Matrix Systems and Processing Methods", Journal of Thermoplastic Composite Materials, 1(3), pp.277~296 (1988)
- A. G. Gibson, "Impregnation technology for thermoplastic matrix composites", Journal of Composite Manufacturing, 3(4), pp.223~233 (1992)
- Stephen Whitaker, "Flow in Porous Media : A Theoretical Derivation of Darcy’s Law", Transport in Porous Media, 1, pp.3~25 (1986)
- Ramakrishna, S., "Mechanical Properties of Knitted Fabric Reinforced Thermoplastic Composites", Proceeding of the 10th ICCM, 4, pp.245~252 (1995)
- Hussain, M., "Evaluation of mechanical behavior of CFRC transverse to the fiber direction at room and cryogenic temperature", Composites : Part A, 31, pp.173~ (2000)