A screen changer is an industrial device used to filter out foreign particles and impurities from molten materials, and is widely used in the melt processing of plastics, rubber, ceramics, and other materials. Below are its main classifications and functional features: I. Hydraulic Screen Changer Utilizes hydraulic drive to move the screen plate or cylinder, offering fast screen-changing speeds (13 seconds) and strong sealing performance. Suitable for high-viscosity materials (e.g., PE, PP, PVC)