The utility model discloses a novel mold clamping oil cylinder, including a cylinder barrel and a rear end cover in sealing fit therewith. A large piston rod is slidably installed inside the cylinder barrel, and a cavity for inserting a fast piston rod is formed in the large rod. The fast piston rod is provided with an axial through hole communicated with the oil inlet and outlet on the rear end cover, and its rear end is fixed on the cover. A piston at the rear of the large rod divides the cylinder into a front chamber and a rear chamber. The front chamber is connected to the mold opening oil port on the cylinder front end. A liquid charging valve body is fixed at the lower end of the rear cover, with its upper end communicated with the rear chamber and its lower end connected to the main oil tank. A pressurizing oil port connecting the rear chamber and main oil circuit is also arranged on the rear cover. The structure realizes fast mold opening and closing, reduces oil pump displacement and motor power, and achieves remarkable energy-saving effects.
Country Code: CN
Application Number: CN201920058156.3
