마이크로 광학 패턴이 있는 차량용 후육 라이트 가이드의 CAE 및 사출성형에 관한 기초연구
A study on CAE and injection molding of automotive thick-walled light guide with micro-optical patterns
1
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
In this study, basic research was conducted on manufacturing technology of thick-walled light guide a component that controls the light source of automobile lamps. As a preliminary study for manufacturing the final injection molded parts, a model for analyzing the influence of micro patterns on light guides is presented. The optical characteristics of the light guide were analyzed according to the change of the curvature radius of the micro-optical pattern, and the injection molding characteristics of the light guide according to the change of injection molding conditions were analytically evaluated. It was confirmed that the luminance uniformity improves as the R value decreases for changes in the micro-pattern R value, but it was confirmed that there are technical limitations in actual injection mold core processing and high-replication injection molding. Injection molding analysis showed that cooling channel design is very important compared to general injection molding due to thick-wall characteristics and thickness variation. It was also confirmed that the cooling channel has a great influence on the cycle time and birefringence result due to residual stress. As a result of analyzing the influence of filling time, holding condition, and cooling on shrinkage, it was found that the cooling water temperature has a significant effect on the shrinkage of ultra-fine light guide parts, and the holding condition also has a significant effect.
Abstract
In this study, basic research was conducted on manufacturing technology of thick-walled light guide a component that controls the light source of automobile lamps. As a preliminary study for manufacturing the final injection molded parts, a model for analyzing the influence of micro patterns on light guides is presented. The optical characteristics of the light guide were analyzed according to the change of the curvature radius of the micro-optical pattern, and the injection molding characteristics of the light guide according to the change of injection molding conditions were analytically evaluated. It was confirmed that the luminance uniformity improves as the R value decreases for changes in the micro-pattern R value, but it was confirmed that there are technical limitations in actual injection mold core processing and high-replication injection molding. Injection molding analysis showed that cooling channel design is very important compared to general injection molding due to thick-wall characteristics and thickness variation. It was also confirmed that the cooling channel has a great influence on the cycle time and birefringence result due to residual stress. As a result of analyzing the influence of filling time, holding condition, and cooling on shrinkage, it was found that the cooling water temperature has a significant effect on the shrinkage of ultra-fine light guide parts, and the holding condition also has a significant effect.
참고문헌 (8)
- Lee, D. W., "An Analysis of the Technology Market for Development of LED Head lamps for Vehicles", Korea Institute of Science and Technology Information, pp.5~47 (2013)
- Gebauer, M., "Light guide technology in headlamps and rear lamps", Auto Technology, 6, pp.34~37 (2006)[DOI]
- Kuo, C. J., "Optimization of injection molding processing parameters for LCD light-guide plates", Journal of Materials Engineering and Performance, 16, pp.539~548 (2007)[DOI]
- Lin, T. H., "Luminance of injection molded V groove light guide plates", Polymer Engineering & Science, 48(8), pp.1615~1623 (2008)[DOI]
- Tofteberg, T. R., "Effects of Injection Molding Holding Pressure on the Replication of Surface Microfeatures", International Polymer Processing, 25(3), pp.236~241 (2010)[DOI]
- Do, Y., "Surface characteristics on the optical pattern die of light guiding plate by machining types", Journal of the Korea Society of Die &Mold Engineering, 2(4), pp.1~4 (2008)
- Hwang, C. J., "Replication of concave and convex microlens array of light guide plate for liquid crystal display in injection molding", Journal of the Korea Society of Die & Mold Engineering, 2(2), pp.29~32 (2008)
- Hwang, C. J., "Study on the gate cutting of light guiding plate for mobile using quenching element", Korea Society of Die & Mold Engineering, 2(2), pp.1~4 (2008)