I want to create a part like the image I am attaching. I want to obtain a mold cavity feature which can be split in two halves. The shape that needs to be in the cavity is also attached.

There are two types of files attached for the geometry of the cavity needed, one file is a surface imported feature and the other file is the same thing but made as solid.

I used assembly to create a mold and then section view to take the screenshot. But how do I place the entire loop inside a mold and split it into two parts?

Something like this SolidWorks Cavity Tutorial | LearnSolidWorks.com