Reduce BMC injection molding air trap research

• Main Authors: SU, YUNG-HSIANG, 蘇永祥
• Other Authors: 吳 政 憲
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/44233597835083850247

碩士 === 國立高雄應用科技大學 === 模具系碩士在職專班 === 101 === The reflector of headlamp is the key technology components. The main function is to reflect light and make the photometric results can match government or vehicle manufacturers’ regulation requirement and to ensure road safety. Currently most of the lights are produced by using the BMC reflectors, which is a thermosetting plastic with characteristics of heat resistance, low shrinkage, high mechanical strength, dimensional stability, chemical resistance, UV resistance and water resistance and others. The main disadvantage of BMC's is not be able to be recycled after forming, or processing with secondary metalizing process, so the injection molding of the material even more important to avoid any pollution and environment problem. Therefore, the ways to reduce the NPL ratio of BMC Injection Molding are very important, not only to reduce unnecessary waste, cost and make great benefits, but also reduce environmental pollutions. In this study, the abnormal entrapped air problems in BMC Injection Molding will be discussed, by applying basic fluid mechanics theory, simulation analysis and experimental verification, establish a lower BMC Injection Molding poor methodology which includes prevention at the design stage, mold modification and finished entrapped air solving construction method of three parts. Combined theoretical and experimental validation study thermosetting plastic injection molding related technologies, by reducing the defect rate BMC molding entrapped air lamp reflector to enhance yield and quality stability. This thesis can be divided into two directions: (1) First of all, to take a product to be simulated and analyzed, and then to verify the actual injection molding, the last direct shipments. (2)Take one case study to describe the post-treatment process engineering methods (how to modify the NG products, or for the production line of products for compensation correction). Keyword: Lights, Reflectors, Thermosetting Plastics,Injection Molding,Moldflow Analysis