Cavity Surface Temperature On Injection Analysis And Improvement

The temperature on mold cavity's surface affects the melt's flow and cooling in the course of injection molding, then has an important part in the solution of injection molding. The best method is that we can get the distributing of the instantaneous temperature to simulate numerical value.But it is very difficult to do because of plenty of calculation in the process of mold cooling analysis. Resolving this, people only calculate the average temperature and then make it as the boundary condition to gain the melt temperature at present. Of course, there is some error for the final melt temperature when we make use of the average temperature compared the instantaneous temperature which make it as the boundary condition. The error is acceptable when the precision is not too high, but it can affect numerical analysis to the thin or precise produce.The paper takes one-dimensional finite element method to simulating temperature field, and deduces the account formula on the instantaneous temperature field, and compiles the VC++ program, including:(1) Analyze the model temperature state, control and the effect of molding process, and the mechanism of the filling, packing and cooling.(2) Deduce the account formula on the one- dimensional instantaneous temperature field from the differential equation, and compute the temperature on mold cavity's surface by which gets the melt temperature.(3) Analyze the error for the final melt temperature when we make use of the average temperature compared the instantaneous temperature which make it as the boundary condition when processing CAE cooling. Advancing a new method simulating the instantaneous temperature to act the boundary condition to improve the precision.