Can somebody show me an example of the feature "Mold" use?
If by mold you mean "mold tools" then here is an example. The model I show is very simple. Molds can get much more complex, but the steps remain pretty much the same. So... start with simple. Even simple take many steps. I have attached the model file in roll-up, so you can step through to see how it works.
Hope this helps. PS SW also has a tutorial on their help page as well.
Answered with a tutorial: https://grabcad.com/tutorials/can-somebody-show-me-an-example-of-the-feature-mold-use