Hello jinithith2,
here's is one way of doing a hinge. It works pretty good, and you may have to try it a few times till you get it where your happy. You can find round rod at a local hobby shop under the name of Evergreen or Platistruct. You may even use round sprue, just stretch it with low heat to the size you need. All you have to do then is to drill out the ends. Hope this helps some. Post your hinges when your done, love to see them.