There is air in the hydraulic cylinder
When the four-column hydraulic machine moves slowly, we should first think about the air entering the hydraulic cylinder. Start with checking the exhaust operation through the exhaust equipment of the machine, and check whether there is air in the movement direction of the piston rod. If so, it may be that the sealing ring is defective and should be changed in time.
Check whether the hydraulic pump is operating normally
When the four-column hydraulic press moves slowly and the hydraulic pump could be running irregularly. It means that there is a problem with the hydraulic pump, and it should be repaired or changed in time.
Check the operation of the piston
When the hydraulic cylinder of a four-column hydraulic machine with a buffer device is intermittently started in reverse, the piston will be temporarily interrupted or retreated. This causes the hydraulic machine to move slowly. This is because the one-way valve orifice is too small, causing a small amount of hydraulic oil to enter the buffer chamber of the machine. When such a defect occurs, the orifice of the one-way valve should be enlarged, and the amount of oil that enters the buffer cavity should be added.
The piston moves at a high speed
When the speed of the piston movement is too high, the steel ball of the one-way valve will move, and then the orifice of the one-way valve will be blocked. This causes irregularities in the movement of the hydraulic cylinder. If encountering this situation, the steel ball should be converted into a poppet valve spool with a pilot valve.
The hydraulic cylinder is not sensitive
When the inside of the rubber hose peels off, it will cause intermittent defects in the oil circuit. The result is irregularities in the action of the hydraulic cylinder. Cleaning method: change the rubber hose in time.
The above are some of the reasons for the slow action of the four-column hydraulic press and their solutions.