Modeling overflow wells in 3D models

An overflow well is a secondary cavity into which the gas can displace polymer and thereby penetrate further into the part.

1. Click (Home tab > Molding Process Setup panel > Process Settings) and select Gas-assisted Injection Molding.
2. Model the overflow well(s) together with the part in your CAD system, then import the model and create the tetrahedral mesh. Select the overflow well elements, then click (Mesh tab > Properties panel > Assign), then in the Assign Property dialog select New > Overflow well (3D). You can also model overflow wells by creating beams on your 3D model with the property Overflow well (beam).
3. To specify the overflow well properties, select an overflow well element then right-click and select Properties. The overflow well properties dialog for the element type opens.
   1. For 3D and beam overflow wells, you need to specify the volume or diameter, respectively, of the overflow well on the Overflow Well Properties tab.
   2. To assign a valve gate to the overflow well, select the Valve Control tab, click Edit..., select the valve control method (usually Time in Gas-assisted injection molding), then click Edit settings... and enter the opening and closing times of the valve gate. Click OK twice to close the valve control related dialogs.
   3. When you have finished editing the overflow well properties, click OK to close the properties dialog.

Note: The Gas-assisted injection molding analysis is supported only for Midplane and 3D mesh types.