To change the screen, the pistons are ejected from the housing one after the other using hydraulic cylinders. Once replaced, they are returned to their production position in the same way. During the brief screen change process, the melt flows continuously through the other piston, thereby ensuring the system's constant operation. SCREEN CHANGERS FOR blowing machines, extruding machines, plastic extruding machines, double-screw extruders. foaming machines, plastic sheet packaging machines,