This is a post by Bettina Giemsa on PTC site.

Are you designing a mold? Once your model design is established, why reinvent the wheel? With Creo Parametric you can quickly duplicate your model’s surfaces and combine the reverse surface with parting surfaces to form a mold component.

First, create a quilt surface on the reference part. Then, that surface can be used in your mold assembly. Here’s how:

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