The injection location temperature moves toward the mold temperature during the packing and cooling phases because there is negligible flow from the barrel during these phases.
The injection location temperature affects the flow of the melt into the part during packing, usually by decreasing the flow. To achieve realistic warpage values, it is important to take the injection location temperature into account during the packing and cooling phases.
Two different calculations are used depending on the type of model that you are analyzing.
- Dual Domain
- The initial melt temperature constraint at the injection location is ignored when filling is complete. The injection location temperature change is calculated using the mold temperature as well as convection and shear heating information.
- 3D
- The mold temperature and the cylindrical diameter of the injection location are used to calculate the injection location temperature change during packing and cooling. The injection temperature at the end of fill is used for the initial temperature in the calculation, and only heat conduction is considered.
Note: You can use an automatic gate contact diameter or set a specific gate contact diameter when injecting directly into the cavity.