extrude
NX Hints and Tips – Extrude with intersecting section curves in one feature
NX7 short tutorial explaining how the extrude feature can be used to construct the ribs for a molded part.
NX4 Extrusions
Using Extrusions for modeling and assembling with NX4.
NX 7.5 Extruding Self-Intersecting Curves
NX7.5 modeling technique called “Extruding Self-Intersecting Curves.” A great new piece of functionality in the extrude tool allows the user to extrude self-intersecting curves. This is a great way to create ribs or similar features without having to extrude lines separately.