Use the Solid Core/Cavity Separation wizard to divide a part into its molding pieces.
For example:
The part is split into the cavity and core sections.
.
.
Any ambiguous faces remain in the central region
and
.
to display or hide
Undercut shading; this shading indicates faces that have insufficient draft when viewed from above or below the tool.
to select Core and cavity transparency. This lets you see clearly the faces that are ambiguous, that is, they are not assigned to the cavity or the core.
If you are not in translucent mode, you can also assign an ambiguous face by clicking on the core or cavity.
to deselect
Core and cavity transparency.
to the core as follows:
, you need to create a new line of draw as follows:
to display a default draw direction for the selected face.
(Select draw direction toolbar) to accept the default draw direction and assign the selected part to the new draw direction.