It is the core filtering device installed between the extruder and the die head, specifically designed to intercept impurities and particles in the plasticized melt, preventing black spots and crystal particles from entering the finished product. It serves as the "impurity gatekeeper" of the extrusion production line.

Core working principle: The high-precision filter screen is supported by an alloy porous plate, and it switches between the "working position" and the "standby position" through a plate/column carrier. When changing the filter screen, the material flow does not need to be completely interrupted, and the clogged filter screen can be replaced, ensuring uninterrupted melt filtration throughout the process.

4 categories + precisely tailored scenarios

Manual screen changer: simple structure and low cost, suitable for small-scale pilot lines and small-capacity workshops with low screen changing frequency, requiring brief downtime for screen changing

Hydraulic screen changer: dual-station quick switch, completing screen change in 1-3 seconds, without machine downtime or production delay, suitable for conventional granulation, pipe, and sheet production lines

Mesh belt type automatic screen changer: The long mesh belt continuously and slowly moves the screen, with no instantaneous switching action at all, resulting in almost zero pressure fluctuation. It is a standard equipment for high-precision processes such as cast film and chemical fiber spinning

Backwash screen changer: Equipped with an online backwash function, the filter screen can be reused, specifically adapted to high-impurity working conditions such as waste plastic recycling and granulation, reducing material costs by half

Selecting the right type for different production lines can directly reduce 80% of screen change failures and product quality issues, and you no longer have to squat beside the machine every day to wipe up the leaked material!