Modeling overflow wells in Midplane 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) by creating regions with the property Overflow well (Midplane) and/or curves with the property Overflow well (beam).
3. Click (Mesh tab > Mesh panel > Generate Mesh) to mesh the overflow wells.
4. 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 Midplane and beam overflow wells, specify the thickness 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 Gate 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.
5. To simulate an overflow well of infinite volume, click (Boundary Conditions tab > Venting panel > Venting Locations) and click on a node belonging to an overflow well triangular element or beam. A venting location symbol is displayed on the selected node.

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

Note: Overflow wells of infinite volume are only supported for Midplane meshes.