The dual-plate screen changer serves as the core melt filtration and continuous production unit in plastic extrusion lines. Featuring a dual-plate, dual-channel design with independent dual-station filtration, it employs hydraulic drive for non-stop screen changes. This configuration balances large filtration area, minimal pressure fluctuations, and high production stability, making it the mainstream choice for mid-to-high-end extrusion lines demanding high continuity. Core Structure and Working