Mold Design

There is a part(A) in assembly file. A new part (block like part) has been created in assembly file to make a core of the part(A). Then to make core part visible, that new part has been deleted by using Cut-Extrude command in a particular portion.

How can Cut-Extrude command that applied to a particular portion delete entire new part?

Solidworks tutorial | Mold Design in Solidworks | Cavity and Core in Solidworks - YouTube

Time 13.43

     

SolidworksPlastics And Mold Design