The Study of Optimal Molding of a LED Lens with Grey Relational Analysis and Molding Simulation

作者：Min-Wen Wang, Fatahul Arifin, Van-Hanh Vu · 发表于：Periodica Polytechnica Mechanical Engineering · 年份：2019 · DOI：10.3311/ppme.13337 · 被引用次数：19 · 研究领域：Injection Molding Process and Properties、Manufacturing Process and Optimization、Additive Manufacturing and 3D Printing Technologies

Injection molding technology is known as the most widely used method in mass production of plastic products. To meet the quality requirements, a lot of methods were applied in optimization of injection molding process parameter. In this study the optimization based on Taguchi orthogonal array and Grey relational analysis (GRA) is used to optimize the injection molding process parameters on a LED lens. The four process parameters are: packing pressure, injection speed, melt temperature and mold temperature. The multi-response quality characteristics are total displacement, volumetric shrinkage, and thermal residual stress. The optimal molding parameters are packing pressure (90 MPa), injection speed (300 mm/sec), melt temperature (270 °C) and mold temperature (90 °C). The luminous uniformity of the LED is 92.61 % and the viewing angle of the LED is 124.76°. Among the four factors, packing pressure plays the key role in reducing total displacement, volumetric shrinkage, and thermal residual stress.