Mold Design and Casting > Working with Volumes > Splitting to Volumes > How a Split Works
  
How a Split Works
You can use parting surfaces, classified surfaces, or volumes to split workpieces or die blocks into one or more volumes. Before splitting a volume you must create features such as reference part cutout, volumes, and parting surfaces. When you split volumes—
The volume of the workpiece or die block material is calculated to one side of the parting surface.
The split off volume is turned into a mold or die volume.
The split is repeated for another side.
Before you split the workpiece or a volume, you must cut out the reference parts from the workpiece. When the reference parts are cut out, by default, all the workpieces and reference parts are selected. Alternatively, you can clear the Include All check box in the Workpiece and Reference Parts fields to manually select the workpieces or reference parts. After splitting volumes, you can preview the results for one or more volumes.
For mold or cast assemblies with multiple workpieces, you can select one or more workpieces or die blocks to split them concurrently. When you use parting surfaces to split volumes, one or more volumes replace the original volume. When you use other volumes to split volumes the new volumes that are created do not replace the original volume.
 
* If you classify the surfaces of a part into core, cavity, and undercut regions, you do not need to cut the reference part out of the workpiece. In that case, you can split a volume into multiple volumes by selecting classified and parting surfaces.