What is a plastic granulator? A plastic granulator is a machine used for breaking down plastic products for recycling. These machines come in a variety of types for industries and workshops and the various sizes of plastic products. These machines are also called Plastic Grinders and Plastic waste material cutters. We deal in Top Quality plastic grinders according to material properties. What is the granulation of plastic materials? Waste plastic granulation is the process of taking waste plastic and size reducing it so that it can be reused back in to plastic manufacture. We recycle a range of polymers, such as HDPE, PP, ABS and polycarbonate.