Under the condition that the pouring temperature is 630 ℃ and the extrusion filling speed is 0.4m/s, the mold temperature is selected as 60, 100, 160, 200 and 260 ℃ for simulation. The simulation results from residual melt modulus and residual melt volume are shown in Fig. 1 and Fig. 2. The residual melt modulus mainly shows the isolated residual melt, which mainly indicates the parts prone to shrinkage defects (shrinkage cavity and porosity). It can be seen from Figure 1 that when the mold temperature is 60 ℃ and 100 ℃, there are few areas with high residual melt modulus, and the relative area of isolated residual melt is relatively large; when the mold temperature rises to 60 ℃, the area with high residual melt modulus is relatively large When the mold temperature reaches 200 ℃ and 260 ℃, the residual melt modulus exceeds 1.3, the isolated high modulus area is larger, and the low modulus blue isolated melt area basically disappears. Therefore, when the pouring temperature is 630 ℃ and the mold filling speed is 0.4m/s, the mold temperature is between 160 ℃ and 200 ℃, there may be a better mold temperature.

From the distribution of residual melt volume in Fig. 2, when the mold temperature is 60 ℃, the residual melt volume also appears isolated area; when the mold temperature is 200 ℃ and 260 ℃, the white area is relatively less, that is, the area with high residual melt volume is less. Therefore, from the perspective of residual melt volume, when the pouring temperature is 630 ℃ and the mold filling speed is 0.4m/s, the mold temperature is about 200 ℃, there may be a better mold temperature.

By comparing the residual melt modulus and residual melt volume, it is concluded that the optimal mold temperature is near 200 ℃.