| Hot runner is a new technology which has urgent demand in manufacturing industry with which can bring less waste, shorter production cycle and better manufacturing precision. In this thesis, the author made a deep research on hot Runner system which is based on the integration discussion and study of CAE technology and completed a PET project for hot runner design.In chapter 1, current development of injection mold and the application of hot runner were presented. Based on the analysis of existing problems about Hot Runner key technology, the research aim and the main frame of this dissertation were put forward.In chapter 2, the models of PET material were introduced. The forming procedure and process design based on PET were put forward. On the basis of this theory, the power law model of PET material was adopted and methodically fitted. The general concept of process design was also represented according to the flow theory.In chapter 3, the structure of Hot Runner system was discussed. Hot runners were designed by commercial software Moldflow. These were including with balance and non-natural balance runners.In chapter 4, the method of heat transfer calculating on a hot runner was presented. The principle of the base was presented, and the detail process of calculation was illustrated.In chapter 5, a workshop project example was given. In which, four design of hot runner were evaluated through CAE and HT calculations and based on these results, one optimized design manifold was standing out.In chapter 6, the research work is summarized and the future work of this research was given. |
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