Making core and cavity from part Catia

[tryincatia]

Hello,
I would need hint how to make core and cavity for part. How to create parting line in the middle of body - to divide the part

The part is uploaded below:
http://www.filedropper.com/proba_2

 

[MrCATIA]

These old threads might help:

http://www.3dcadforums.com/catia-forum/7514-catia-surfacing.html

http://www.3dcadforums.com/catia-forum/3556-how-extract-core-cavity-surface-cad-file.html

 

[tryincatia]

Ufortunetly, it is not what I am lokking for. I would like to make partig surface whicjh divides body into two parts