The manual screen changer for laboratory extruders is a critical auxiliary component installed between the discharge port of laboratory-grade extruders and the die head. Its primary function is to filter impurities, gel particles, and other foreign matter from the melt, ensuring the purity of extruded materials and the quality of subsequent products (such as films, filaments, and profiles). It also protects the precision flow channels of downstream die heads. This equipment is widely used in lab