Machines for processing plastics and plastic waste; recycling machines for plastics; machines for recycling treatment of plastics and for treating waste, in particular plastic waste, biomasses or household waste; cutting, comminuting, compacting and homogenizing devices for plastic materials, plastic foils, plastic bottles or plastic waste; machines for plasticizing plastics; machines for agglomerating plastics; machines for comminuting plastics, machines for granulating plastics; machines for filtering plastic melts; installations for the heat treatment of plastics; installations for the solid phase polycondensation of plastics; extrusion installations; intrusion apparatus; extruders for plastics, extruder screws, plastic melt filters, filtering devices for plastic melts, backwashing filters, screen filters, screen changers, screens and filters for extruders; degassing devices, degassing devices for extruders for plastic material; all the aforementioned goods machines and structural machine parts.