Circulating lubrication system for injection molding machine

The utility model discloses a circulating lubrication system for an injection molding machine. The lubricating device comprises a lubricating oil tank (20), an oil supply pump (9), a mold locking lubricating structure, a pull rod lubricating structure, a mold adjusting lubricating structure and a lubricating pipeline (3), the oil supply pump (9) is used for pumping lubricating oil from the lubricating oil tank (20); the lubricating oil is conveyed to the mold locking lubricating structure, the pull rod lubricating structure and the mold adjusting lubricating structure through a lubricating pipeline (3) and returns to the lubricating oil tank (20) through an oil return pipe (7), and the lubricating oil after backflow is filtered in the lubricating oil tank (20) and then continues to be pumped by the oil supply pump (9) to enter a circulating lubricating system. According to the utility model, the injection molding machine is lubricated in a quantitative and cyclic recovery manner, related parts are modified, a