Hydraulic press (a kind of hydraulic press) is a kind of hydraulic press with special hydraulic oil as working medium and hydraulic pump as power source. The hydraulic oil enters the cylinder/piston through the hydraulic pipeline under the action of the pump, and then there are several sets of seals in the cylinder/piston. The seals in different positions are different, but they all play a sealing role, so that the hydraulic oil will not leak. Finally, the hydraulic oil circulates in the oil tank through the one-way valve, so that the oil cylinder/piston does work circularly, thus completing certain mechanical actions as a productivity machine.

The hydraulic press consists of a main engine and a control mechanism. The main machine part of hydraulic press includes machine body, master cylinder, ejector cylinder and liquid filling device. The power mechanism consists of oil tank, high-pressure pump, low-pressure control system, motor, various pressure valves and reversing valves. Under the control of the electric device, the power mechanism realizes energy conversion, adjustment and transmission through pumps, oil cylinders and various hydraulic valves, and completes the cycle of various technological actions.