3 Cooling simulation analysis results and improved results
According to the above simulation analysis results, as shown in (a) of Fig. 1, it can be seen that the cooling duct does not achieve the desired cooling effect, and the cooling effect is ideal only in the surrounding area of ​​the cooling duct, and the rest of the area is relatively high in temperature, and The individual corner temperatures in the model are too high. Therefore, the parameters of the preset cooling pipe and its layout are not ideal for cooling. It can be seen from the graph (b) in Fig. 1 that the average temperature of the workpiece is slightly better than the surface temperature of the workpiece. But it also reflects the lack of cooling strength; from Figure 1 (d) it can be seen that the difference between the inlet and outlet temperatures of the coolant reaches 6 ° C, indicating that the cooling pipe can not meet the cooling needs of the part, the cooling system The cooling capacity needs to be improved.The number and layout of the cooling ducts were modified based on preliminary analysis results. After many similar iterations of analysis, comparison, and modification: the number of cooling pipes increased from the first three pipes to nine. Cooling ducts are added in areas with higher temperatures and piping layout is optimized. At the same time, the diameter of the cooling pipe is increased from the original 10 mm to 12 mm, and the population temperature of the coolant is lowered from the original 25 ° C to 23 ° C. The modified settings are shown in Figure 2, and the MPI/Cool process simulation analysis is performed. The improved results achieved the expected results, as shown in Figure 2. Among them, the figure (a) shows that the surface temperature of the article is improved, and the figure (d) shows that the difference in the temperature difference between the inlet and the outlet of the coolant is reduced.
Figure 2 Results of improved post-cooling simulation analysis
4 Conclusion
In this paper, various factors affecting the injection molding cooling system are analyzed by examples, and corresponding improvement schemes are proposed according to various results of dynamic simulation analysis. The results show that the optimized cooling system of the injection mold achieves the expected cooling effect, shortens the design cycle of the mold and brings obvious economic benefits to the cooperative manufacturers.
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