I. Structure and Principle of Dual-Plate Dual-Station Screen Changer The dual-plate dual-station screen changer primarily consists of two filter plates, the main body of the screen changer, a hydraulic system, a control system, and other components. Its working principle is as follows: 1. Working State: During normal operation, the plastic melt enters the screen changer from the extruder and is diverted into two parallel flow channels. It is then filtered through the mesh screens on the two filt