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논문 기본 정보

자료유형
학술저널
저자정보
Lee, Jae-Yeol (Department of Mechanical Engineering, Sogang University) Kim, Nak-Soo (Department of Mechanical Engineering, Sogang University) Lee, Jae-Wook (Department of Chemical and Biomolecular Engineering, Sogang University)
저널정보
한국유변학회 Korea-Australia rheology journal Korea-Australia rheology journal 제20권 제2호
발행연도
2008.1
수록면
79 - 88 (10page)

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In this study, we focus on the improvement of the filling efficiency in injection molding by application of ultrasonic vibration. While studies about the filling efficiency of typical filling processes in the injection molding have been widely performed, there have been only few studies about the filling efficiency of an ultrasonic process. The effect of the ultrasonic vibration is an important process condition, which influences the flow characteristics of polymer melt. This new condition even affects well-known injection conditions such as cavity pressure, injection temperature and mold temperature. For this study, we carried out a numerical analysis by appropriate modeling and analysis of the ultrasonic process in the filling process. To verify this numerical analysis, we compared the numerical results with the experimental data. Also, we analyzed the filling process in a thin cavity using this numerical analysis. To understand the flow characteristics of polymer melt in the ultrasonic process, we substituted real and complex vibration conditions with simplified and classified conditions according to the position of vibrating cavity surfaces and the phase difference between two opposing cavity surfaces. We also introduced MFR (melt flow ratio) as a new index to estimate the filling efficiency in the ultrasonic process.

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