A lead screw and oil cylinder mold opening and closing mechanism of a plastic extrusion blow molding machine comprises a front template, a moving template and a rear template which are connected by guide pillars and realize synchronous linkage. A blow molding die is arranged between the front template and the moving template, a mold opening and closing mechanism is arranged on the rear template, the mold opening and closing mechanism comprises a servo motor arranged on the rear template, the servo motor is connected with a lead screw through a coupling, a sleeve nut is sleeved on the lead screw and connected with the moving template, and a positioning structure is further arranged on the lead screw. The positioning structure comprises a positioning gear arranged at the rear part of the lead screw, a positioning cylinder is arranged on the rear template, a positioning rod is connected to the positioning cylinder, and the positioning rod is matched with the positioning gear. Compared with the traditional technology, the mechanism is driven by a servo motor, the power of the servo motor is only 1.8KW at the minimum according to the size of the machine, and the power consumption can be saved by 40% to 50% compared with an oil pump motor. Meanwhile, the lead screw transmission has high speed and low vibration, and the positioning structure can prevent the blow molding die from expanding, ensuring the blow molding quality.
Country Code: CN
Application Number: CN202222905364.7
