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A numerical study on micro leakage behaviors at cavity edge during photo reaction injection molding  

La, Moon-woo (Korea Institute of Industrial Technology, Molds & Dies Group)
Publication Information
Design & Manufacturing / v.10, no.3, 2016 , pp. 8-13 More about this Journal
Abstract
Despite technological advance, there have been several troubles in photo reaction injection molding (photo RIM) to produce ultra thin light guide panels (LGPs). In this study, micro leakage problem at cavity edge during photo RIM was investigated numerically. In order to obtain optimal processing conditions, we regulated inlet pressure of injected resin at the cavity edge and figured out micro leakage behaviors. At low inlet pressure (less than 100 Pa), though the micro leakage problem was not occurred, another problem, short shot due to not enough driving force, was appeared More than 1,000 Pa of the inlet pressure, injected resin was rapidly leaked through the micro gap at the cavity edge. Finally, we obtained optimal inlet pressure around 600 ~ 1,000 Pa. At this region, injected resin fully filled the cavity without micro leakage behavior. Based on the present study, further comparative investigations with experimental photo RIM should be performed to find optimal processing conditions for produce ultra thin LGPs.
Keywords
Cavity edge; Leakage; Photo reaction injection molding; Simulation;
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1 김경동, 김도현, 이광희, 김성철, 반응사출성형 (RIM) 공정의 최근 동향, 폴리머, 제8권, 제5호, 289-299, 1984.
2 Castro, J. M., and C. W. Macosko. "Studies of mold filling and curing in the reaction injection molding process." AIChE Journal, Vol. 28, No. 2, pp. 250-260, 1982.   DOI
3 Becker, Walter E., Reaction Injection Molding. Van Nostrand Reinhold Company, 1979.
4 Sweeney, F. Melvin. Introduction to reaction injection molding. Technomic Pub Co, 1979.
5 Manzione, Louis T. "Simulation of cavity filling and curing in reaction injection molding." Polymer Engineering & Science, Vol. 21 , No. 18, pp. 1234-1243, 1981.   DOI
6 Koh, W-. G, and Pishko, M.. "Photoreaction injection molding of biomaterial microstructures," Langmuir, Vol. 19, No. 24, pp. 10310-10316, 2003.   DOI
7 Vetterling, William T. "Multiphase Laminar Flow with More Than Two Phases." Proceedings of the 2015 COMSOL Conference in Boston, 2015.