Effect of cavity surface average temperature boundary on injection molding simulation

injection simulation;  temperature field;  finite element method;  Cavity surface temperature

The one-dimensional finite element method was used to simulate the temperature field in the injection molding process, and the error caused by the average temperature boundary condition of the mold cavity surface was discussed for the heat transfer analysis. The results show that when the accuracy of the mold is not high, the error is acceptable; However, for precision injection molded parts, or thin parts, this error can have an impact on the numerical analysis. In view of this situation, according to the actual transient temperature distribution, a transient temperature field method with average temperature construction is proposed to improve the accuracy of numerical simulation of injection molding.