The Application of Injection Compression Molding Method to Enhance the Quality of Large-Sized Light Guide Plates

• Main Authors: Chun-Hsien Li, 李俊賢
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/80870469270347286894

碩士 === 國立高雄第一科技大學 === 機械與自動化工程所 === 95 === This research aims to investigate the effects of injection compressing molding process to the replication ability of V-groove micro-structure on light guided plate, a key component of backlight module. In the research, Taguchi method is employed to observe how the key process parameters, mold temperature, injection speed, packing pressure, packing time and cooling time affect the replication ability of micro-structure. Further, we intend to resolve the warping condition of light guided plates, and improve their brightness and uniformity with injection compression molding method. A 17” large-sized light guided plate with V-groove micro-structure has been selected as a research vehicle to evaluate the performance of injection compression molding coped with L18 Taguchi experimental design method. The experimental results show that the higher the mold temperature is, the higher the replication ability of light guide plates’ micro-structure will be. Comparing to conventional injection molding method, it shows that the replication height of V-groove raises from 78.25% to 82.38%. The corresponding yield rate is estimated to significantly improve from 43.29% to 99.6%.