Tutorial: Unigraphics NX mold design : Section 6.4 Mold Parting Tools Define Parting Syrface
2 Answers

Define Parting Surface
Answered with a tutorial: https://grabcad.com/tutorials/tutorial-unigraphics-nx-mold-design-section-6-4-mold-parting-tools-define-parting-syrface

Sample file Used for This Tutorial is Uploaded to library https://grabcad.com/library/nx-mold-design-1