Study on the micro-structures of long fiber through runner and cavity in injection molding for reinforced thermoplastics (FRT)

Chao Tsai Huang, Xiang Lan Peng, Sheng Jye Hwang, Huan Chang Tseng, Rong Yeu Chang

研究成果: Conference contribution

摘要

Lightweight technology has been applied into many industries especially for automotive to enhance the fuel efficiency. One of most famous methods is applied fiber-reinforced thermoplastics (FRT) technology, it includes short and long fiber-reinforced thermoplastics (FRT) to support lightweight technology. However, the enhancement mechanism by the microstructures of the fibers in FRT is still too complicated to understand. In this study, we designed a benchmark to study the fiber microstructures based on ASTM D638 with dog-bond system. First, we have tried to study how the geometry of cavity influences the fiber orientation during the injection processes. Furthermore, we have paid the attention on the variation of the fiber length distribution as the injection molding processing. Results show that the geometry of cavity has significant effect on the fiber orientation during the injection processes. Since the system has contraction and expansion structure, the orientation tensor component a11 corresponding to the flow direction, will be enhanced and then decreased along the cavity. Moreover, the fiber lengths have dramatically sharp distribution on skin layer when melt goes through the gate into the cavity. It will allow almost 90% lengths are broken through the skin layer. Meanwhile, using numerical visualization from runner to cavity through core layer, there is about 30% length broken during the journey in runner section. Finally, some fiber orientation results are compared with some literature's. Results showed that our numerical predictions are matched with that of literature quite well in the trend.

原文English
主出版物標題75th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Anaheim 2017
發行者Society of Plastics Engineers
頁面766-771
頁數6
ISBN(列印)978-0-692-88309-9
出版狀態Published - 2017
事件75th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Anaheim 2017 - Anaheim, United States
持續時間: 2017 五月 82017 五月 10

出版系列

名字Annual Technical Conference - ANTEC, Conference Proceedings
2017-May

Other

Other75th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Anaheim 2017
國家/地區United States
城市Anaheim
期間17-05-0817-05-10

All Science Journal Classification (ASJC) codes

  • 化學工程 (全部)
  • 聚合物和塑料

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