Importing a model of the core from a CAD program

You can import the core model from a CAD program.

If you want the core to extend past the end of the part, use Inserts to create a mold insert.

Note: You can prepare the core while it is meshed if the starting point of the core is the mesh of the part, originally exported from this product. This ensures the mesh of the core will match the part perfectly. If you are importing the geometry of the core created in a CAD package, it will be difficult to match the surface mesh between the core and the part.

1. Import the CAD model of the core into a new study, using a Dual Domain mesh with a similar density to the part model.
2. Double click the mesh icon in the Study Tasks pane to create the Dual Domain mesh.
3. Repair the mesh where necessary to ensure it has no errors.
4. Change the properties of the elements on the Core elements layer to Part Surface (Dual Domain).
5. Change the mesh type to 3D and remesh the core.
   Tip: Use a minimum of 4 elements through the thickness of the mesh.
   Note: The core mesh and the part mesh must be within the Surface Matching Tolerance value (default: 0.22mm).
6. Set the Property Type of all elements on all layers to Core 3D.
   Tip: The name of the property assigned will be displayed in the analysis logs. If you have multiple cores, you can apply a separate Core 3D property with a different name to the elements in each of the cores.
7. You can change the material of the core and the local mold surface temperature control by selecting all elements on all layers, then editing their properties: (Geometry tab > Properties panel > Edit).
8. You must set a fixed constraint on the nodes at the fixed end of the core, where it joins to the mold. Click (Boundary Conditions tab > Constraints and Loads panel > Constraints > Fixed Constraint).
9. Select all the nodes at the fixed end of the core.
   Tip: Ensure that the Select Enclosed Entities option is set (Geometry tab > Selection panel > Select Enclosed entities) and that you rotate the part so the nodes you want to select are in a line. This stops unwanted nodes from being selected.
10. In the Input Parameters section of the Fixed Constraint tool, select Core-shift Analysis from the Use constraint in drop down box, then select Apply to apply the fixed constraint.
11. Rename the layers with core elements in them to:
    • Core nodes
    • Core tetras
    • Core constraints
    This prevents duplication of existing layer names, and allows you to easily identify the core layers when the core is added to the model of the part.
12. Click then click (Save > Save Study) to save your study.
13. Open the study containing the model of the part, and add the study containing the core model to it.

The model is now ready to be used in a Core-shift analysis.