Working principle of four-column hydraulic press: Four-column hydraulic press is an oil pump that delivers hydraulic oil to the valve block of integrated cartridge valve, and distributes the hydraulic oil to the upper cavity or lower cavity of the oil cylinder through various check valves and overflow valves, so that the oil cylinder moves under the action of high-pressure oil.

Four-column hydraulic press is a kind of mechanical equipment that uses the static pressure of hydraulic oil delivered by oil pump to process metal, plastic, rubber, wood, powder and other products.

Widely used in forging, stamping, cold extrusion, straightening, bending, flanging, sheet drawing, powder metallurgy, press fitting and other stamping processes and press forming processes.

Plunger hydraulic press, also known as hydraulic press, is a kind of machine driven by liquid pressure and made by Pascal's law. Of course, the use is also different according to needs. For example, according to the types of liquids that transmit pressure, there are two categories: hydraulic press and hydraulic press.