Numerical Analysis For Cooling Pipe Network Of Injection Mold

The cooling system plays important role the injection molding. To most injection mold, the cooling is realized through the coolant flowing in pipe network. So-called cooling pipe network analysis is to determine the flow rate for each segment and the pressure at segment joints (nodes) when the basic parameters are known.By the analysis, not only can we be sure whether the coolant pump can provide enough press to ensure the flow rate of the network, but also we can predict the coolant-flow distribution in all subcircuits if they exist.The cooling pipe network of injection mold is similar to the water network to a certain degree. Up to date, the general pipe network analysis is well developed, so its theory and numerical method is also widely applied to the pipe network analysis in the cooling system of injection mold. For example, some CAE software for injection mold, such as MPI, C-MOLD, which are considered as word class software, and Z-MOLD developed in our country, are using the general technique of pipe network analysis. However, there are still some shortcomings in the current numerical analysis for cooling pipe network of injection mold. Firstly, both junction method and loop method, two main methods used for the network analysis, have their own disadvantages. Secondly, whether the general network analysis is completely applicable to our special problem is questionable, and no convincing research has been reported.On the basis of the theory of pipe network analysis, the present work is concentrated on the special study of the cooling pipe network of injection mold. The main work is as follows:1. The traditional pipe network analysis was deeply studied, and various numerical methods were reviewed and compared. A new numerical solution to the pipe network analysis, named as junction method with flow rate modification, was presented to overcome the shortcomings existing in the present analysis. The related mathematics model was formulated and the computational frame diagram was given.