The Technology Of Aided Design And Applied Research For Hot Runner System In Injection Molding

Hot runner system has the advantage of increasing productivity, saving raw material and energy conservation. And it is extensively used in plastic injection molding technology. So it is important to develop the design software of hot runner system in injection molding. Basic conception and model tormulation in knowledge unit of hot runner are established in this paper, and the method of hot runner design based on knowledge is put forward, and hot runner design is finished in detail. Then mathematic model in temperature field of hot runner is built, and the distributing condition of temperature field is analyzed. On the basis of the theoretical research, a prototype system is developed, which can support the designer in hot runner designing and analyzing in temperature field.In chapter 1. the background of this research is introduced, and a review of research and application in injection molding and hot runner technology are given, while the open questions are also analyzed. Then the content and skeleton structure of this paper are proposed particularly.In chapter 2. the design knowledge of hot runner system are generalized, and a knowledge unit model is presented, which includes the representation of the design information of hot runner system. The feature and function of knowledge unit of hot runner system are analyzed in detail.In chapter 3. the conventional design method is analyzed, then the total frame of hot runner design based on knowledge is put forward, and knowledge of hot runner design is organized, and the knowledge base of hot runner is built. At last hot runner structural design is finished in detail.In chapter 4, the purpose of hot runner temperature field is analyzed, the key contents of hot runner temperature field are presented, and geometric model of hot runner and mathematic model of temperature field are built. At last finite-element method and visualization technology are used in hot runner temperature field.In chapter 5, the prototype system of hot runner system based on Pro/E is introduced, and chiefly function of hot runner is presented, and hot runner design of injection molding for beverage bottle cap is finished.The research work is summarized and the future work of this research is given in the remainder of this paper.