The film extrusion screen changer serves as a critical filtration device in plastic film production lines. Its core function is to intercept impurities within the meltsuch as unplasticized particles, gel, and metal debrisvia its filter screens, thereby ensuring the purity of the film material and maintaining production continuity. Enhancing Product Quality Filtration prevents defects like black spots, crystalline inclusions, and perforations in the film, improving surface smoothness and mechanic