Guys,Please help me part my product

This is my final year project and I really need help for parting WITHOUT USING MOLD WIZARD.I tried a few methods and everything i try gives me an error.I will face a panel of supervisors soon to review my mold and i am still stuck at the parting phase.My teacher adviser is of no help.I really hope some is able to show me how it's done.Thank you for your time.