The filter of this series consists of a filter belt with a length of 10 meters or 20 meters, a screen changer body, a heating/cooling system, and an electrical control system. No external force control is required, which can effectively increase production, save energy, and reduce costs compared with manual screen changing. Extrusion screen changers can be installed on any new or existing extruder, melt pump, reactor or other extrusion line. It can be used to filter any type of polymer, rubber o