I am wondering how Heat Compression works, I have looked for more details on the proceedure but can't find anything.
Can someone elaborate on the process?
I undertsand that all plastic is thrown into a giant drum and tumbled but why and what is the next step in the process?
Is there heat added while the plastic is being tumbled and if so how much heat and for how long?
Most of the information I found so far is not vague to say the least.
Thanks for any help.

Rob from http://whatisacnc.com/index.php/3d-printer/