A pressurized oil cylinder for a mold clamping device of a blow molding machine belongs to the field of hollow plastic product molding machinery. It comprises a cylinder body, a left cylinder end cover, a pressurizing cylinder, a right cylinder end cover and a piston rod. The left side of the cylinder body is provided with cylinder oil inlet and outlet holes; the left cylinder end cover is fixed to the left end face of the cylinder body, and the pressurizing cylinder is fixed to the right end of the cylinder body. The pressurizing cylinder is provided with a check valve oil hole and a check valve cavity with a check valve inside; the right cylinder end cover is connected to the pressurizing cylinder, and the bottom wall of the right cylinder end cover is provided with end cover oil inlet and outlet holes. The piston rod is arranged in the cylinder body with a piston seal ring on its outer wall; a pressurizing piston is arranged in the pressurizing piston cavity of the right cylinder end cover, with a pressurizing piston column on its left side, and a pressurizing piston top cover fixed to the left end face of the pressurizing piston column, which is provided with a pressurizing piston top cover oil hole; an oil passage opening and closing mechanism is arranged in the pressurizing piston oil cavity and connected to the pressurizing piston top cover. It has excellent automatic pressurization and pressure relief effects, a compact and simple structure, and achieves efficient and ideal pressurization.
Country Code: CN
Application Number: CN201821254983.1
