Why we do draft analysis

[Kusum]

hiiiii I am kusum, my question is why we do draft analysis ?

[Kamlesh]

Hiii kusum,
When we design a component, which is going to be manufacture by Molding process or we say that injection molding, casting etc.
Over there to make a proper clearance between Component and Mould we give draft on component walls. For example Ice Cube, they do have a draft on their side faces. So they can easily pull out when we slightly twist the ice tray.