• Title, Summary, Keyword: 섬유함유율비

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A Study on the Fiber Orientation and Fiber Content Ratio Distribution during the Injection Molding for FRP (FRP의 사출성형에 있어서 섬유배향상태와 섬유함유율분포에 관한 연구)

  • Kim J. W.;Lee D. G.
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • pp.252-257
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    • 2005
  • Injection molding is a very important industrial process for the manufacturing of plastics objects. During an injection molding process of composites, the fiber-matrix separation and fiber orientation are caused by the flow of molten polymer/fiber mixture. As a result, the product tends to be nonhomogeneous and anisotropic. Hence, it is very important to clarify the relations between separation' orientation and injection molding conditions. So far, there is no research on the measurement of fiber orientation using image processing. In this study, the effects of fiber content ratio and molding condition on the fiber orientation-angle distributions are studied experimentally. Using the image processing method, the fiber orientation distribution of weld-line in injection-molded products is assessed. And the effects of fiber content and injection mold-gate conditions on the fiber orientation are also discussed.

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Study on the Fiber Orientation and Fiber Content Ratio Distribution during the Injection Molding for FRP (FRP의 사출성형에 있어서 섬유배향상태와 섬유함유율분포에 관한 연구)

  • Lee Dong-Gi;Sim Jea-Ki;Kim Jin-Woo
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.15 no.4
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    • pp.1-7
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    • 2006
  • Injection molding is a very important industrial process for the manufacturing of plastics objects. During an injection molding process of composites, the fiber-matrix separation and fiber orientation are caused by the flow of molten polymer/fiber mixture. As a result, the product tends to be nonhomogeneous and anisotropic. Hence, it is very important to clarify the relations between separation orientation and injection molding conditions. So far, there is no research on the measurement of fiber orientation using image processing. In this study, the effects of fiber content ratio and molding condition on the fiber orientation-angle distributions are studied experimentally. Using the image processing method, the fiber orientation distribution of weld-line in injection-molded products is assessed. And the effects of fiber content and injection mold-gate conditions on the fiber orientation are also discussed.

Measurement of the Fiber Orientation on Weld-Line Parts for Injection Molding of Fiber Reinforced Polymeric Composites (섬유강화 고분자 복합재의 사출성형에 있어서 웰드라인부의 섬유배향측정)

  • Kim, H.;Kang, M.G.;Choi, Y.S.;Lee, D.G.;Han, G.Y.;Kim, E.G.
    • Proceedings of the Korean Society For Composite Materials Conference
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    • pp.265-270
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    • 2000
  • Injection molding is a very important industrial process for the manufacturing of plastics objects. During an injection molding process of composites, the fiber-matrix separation and fiber orientation are caused by the flow of molten polymer/fiber mixture. As a result, the product tends to be nonhomogeneous and anisotropic. Hence, it is very important to clarify the relations between separation· orientation and injection molding conditions. So far, there is no research on the measurement of fiber orientation using image processing. In this study, the effects of fiber content ratio and molding condition on the fiber orientation-angle distributions are studied experimentally. Using the image processing method, the fiber orientation distribution of weld-line parts in injection-molded products is assessed. And the effects of fiber content and injection molding conditions on the fiber orientation functions are also discussed

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Fiber Orientation of Short Fiber Reinforced Polymeric Composites Depending on Injection Mold Shape Variations (단섬유강화 고분자 복합재료에서 사출성형 형상금형 형상변화에 따른 섬유배향상태)

  • Kim, Hyuk;Han, Gil-Young;Lee, Dong-Gi
    • Proceedings of the KSME Conference
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    • pp.778-784
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    • 2001
  • Injection molding is a very important industrial process for the manufacturing of plastics objects. During an injection molding process of composites, the fiber-matrix separation and fiber orientation are caused by the flow of molten polymer/fiber mixture. As a result, the product tends to be nonhomogeneous and anisotropic. Hence, it is very important to clarify the relations between separation orientation and injection molding conditions. So far, there is no research on the measurement of fiber orientation using image processing. In this study, the effects of fiber content ratio and molding condition on the fiber orientation-angle distributions are studied experimentally. Using the image processing method, the fiber orientation distribution of weld-line parts in injection-molded products is assessed. And the effects of fiber content and injection molding conditions on the fiber orientation functions are also discussed.

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Manufacturing of GFRP Sheet Using Plain Weaving Method (평직직조방법을 적용한 GFRP Sheet 제조에 관한 연구)

  • Kim, in Woo;Kim, Hyoung Seok;Lee, Jung Hoon;Lee, Dong Gi
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.38 no.8
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    • pp.849-855
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    • 2014
  • The GFRP composite is used for hot press flow molding of automotive components, and the different flow rates of fiber and plastic are likely to induce fiber orientation and inhomogeneity in the material. However, very limited systematic research studies are available on composite materials with superior flow homogeneity and optimized fiber orientation. The inhomogeneity and fiber orientation issues of GFRP composites have still not been resolved through research. The plain weaving method applied to the GFRP prepreg can improve its recyclability, inhomogeneity, fiber flow, structural stability, fiber deformation, surface smoothness, degree of impregnation, and other mechanical properties. The need for more detailed and thorough studies is evidenced.

Mechanical Properties of GMT-Sheet on Press joined Molding (프레스 접합성형 GMT-Sheet의 기계적 성질)

  • Kim, H.;Choi, Y.S.;Lee, C.H;Han, G.Y.;Lee, D.G
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • pp.157-163
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    • 2000
  • The application as the parts of an automobile, using the property of GMT-Sheet, is increasing. In order to exchange the parts of an automobile for GMT-Sheet, at first, the establishment and joining problem of exact joining strength must be determined. We have studied it using composites which is not same each other fiber oriented condition so as to determine joining strength and joining condition of GMT-Sheet. In this study, the result of experiment of forming condition concerned joining problem of GMT-Sheet is this ; joining efficiency of GMT-Sheet, increases as lap joint length L increases. Increase of compression ration cause decrease of joining efficiency after of GMT-Sheet, joining. In the viewpoint of recycling, randomly oriented composite of GMT-Sheet is desirable more than unidirectional oriented composite. We have better design the structure so as not occur to stress centralization on the joining part.

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