How should be the material after refining to smooth feeding, shredders or other equipment?.
Also, mill (should be crusher + grinder) made out of granules or powder are mesh control, is generally not up to the requirements of the mesh, so they are used to deal with waste material, not for the processing of raw materials.
After refining can also screw? Open mill, mixer, used as rubber industry pro. The material on the twin screw extruder must be powder and pellets.
It seems that you are not made of plastic yourself, so don't do it blindly, so as not to make money, spend time, make a pile of waste, and then lose a lot.