Physical Simulation Platform Of Injecting Packing Process And Its Control Method Study

The packing phase of injection molding has a great influence on product quality. Currently, the two main study methods are theoretical analysis and physical experiments. However, the theoretical analysis has the disadvantages such as huge computational load and hard to be used for online control. Besides, the physical experiments will increase the material and labor costs. In order to avoid such problems as mentioned above, this paper pointedly designed a physical simulation platform which can be used to simulate this process, and the effectiveness of the platform is demonstrated by a set of experiments. At last, a research of control method is carried out based on the platform.The original contribution of this paper is listed as below:1. The characteristics of the material of injection molding process is studied and the nonlinear viscoelastic of it is represented by a nonlinear Burgers model. Then a physical simulation platform is designed based on the model. The experimental results show that the platform could characterize the properties of the injection molding process, meanwhile, it also has some unique properties.2. The characteristics of friction which is common appeared in the mechanical system is studied. And the original dither-impulse control method is improved. At the same time, how does the change of parameters make influence on the effect of control method is studied. The effectiveness of the method is proved by some experiments. And the application range of the method is discussed in the end.In summary, a physical simulation platform is designed based on the characteristics of the material in this paper. And a set of control method is developed. The experimental results present the effectiveness of the platform and control methods. The proposed method can be used to the similar manufacturing processes.