| The Basics of FEA on Hot Runner Systems |
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As previously mentioned, performing a FEA of a hot runner system is similar to running a mold flow simulation on an injection molded part. Instead of simulating the flow in the part, the flow in the hot runner system will be simulated
First, the initial design of the hot runner system is needed. The design needs to show the number of drops needed, the approximate nozzle locations in the mold and approximate part weight(s). As with any FEA, a CAE model must be generated that represents the hot half design. The flow sizing and distances can be later adjusted based on initial results. Next, the material properties are chosen from a materials database for the analysis. The final step is inputting the molding parameters that will be used on the tool: mold temperature, melt temperature and holding pressure. With this information in place, the FEA can now be performed.
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