The machine flexo generally uses an eccentric sleeve structure, which uses the method of changing the position of the printing plate Since the displacement of the plate cylinder is a fixed value, there is no need to repeatedly adjust the pressure after each clutch pressure of the plate cylinder.
Pneumatically controlled clutch presses are the most common type of clutch presses in  flexo presses. The cylinder is connected with the clutch pressing shaft by a connecting rod, and a plane is partially ironed on the arc surface of the clutch pressing shaft. The height difference between this plane and the arc surface enables the plate cylinder support slider to slide up and down. When the compressed air enters the cylinder and pushes out the piston rod, it drives the clutch pressing shaft to rotate, the arc of the shaft faces downwards, and presses the supporting slider of the printing plate cylinder, so that the printing plate cylinder is in the pressing position; when the compressed air reverses direction , When entering the cylinder and retracting the piston rod, it drives the clutch pressing shaft to rotate, the iron plane on the shaft is downward, and the supporting slider of the printing plate cylinder slides up under the action of another spring cylinder, so that the printing plate cylinder is in the separation pressure Location.