Oil cylinder core-pulling unit and ultra-large integrated die-casting die

The oil cylinder core pulling unit comprises a movable die sleeve plate, a movable assembly, a sliding block oil cylinder and a balance oil cylinder, the movable assembly is installed on the movable die sleeve plate and comprises a mold core, the mold core is used for forming a product, the sliding block oil cylinder is installed on the movable die sleeve plate and connected with the movable assembly, and the balance oil cylinder is installed on the movable die sleeve plate and connected with the sliding block oil cylinder. The sliding block oil cylinder is used for drawing out the mold core, and the balance oil cylinder is installed on the movable mold sleeve plate and used for pushing the mold insert. The balance oil cylinder plays a role in promoting the mold core to be separated from a product while pushing the mold insert, the balance oil cylinder can be matched with the sliding block oil cylinder to jointly pull out the mold core, and therefore the specifications and sizes of the sliding block oil cylin