What is a screen changer? A screen changer, in short a device for filtering impurities in the melt, is widely used in extrusion and polymerization lines. Depending on the structure of the screen changer, you can choose between non-stop screen changer and short-stop screen changer, and the mainstream product in the market today is the non-stop screen changer. First, the structure of the screen changer 1, the main body: usually made of high-strength, high-temperature, corrosion-resistant materials