When extruding plastic products, production waste with vastly different material properties and shapes is generated (e.g. semi-finished plastic products, profiles, pipes, sheets, purges and small trimmings). The yield, shape and properties of the products to be comminuted dictate the configuration of the best-suited feed and comminution processes.
The achievable end-product size varies dependent on the desired end application. Whereas with many applications, 4 – 8 mm suffice (ideally dust-free), fineness values in the powder range can also be required. It is important – especially when the feed product is often changed – that the system can be cleaned quickly and easily.
Machine feeding must generally be monitored constantly, because an uncontrolled material feed constitutes a frequent source of interference in the production sequence. If too much product is fed to the system, it can stall and come to a standstill in the worst case, and if too little product is fed, this will take its toll on the economic efficiency.
