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The application discloses a kind of automatic ink injection equipment for remanufactured ink cartridge refinish processing, and is related to the technical field of remanufactured ink cartridge refinish processing.The bottom end of the exhaust pipe penetrates the exhaust tank and extends into its interior, and the inner diameter of the exhaust pipe gradually increases from top to bottom.A float ball is installed inside the exhaust pipe.The automatic ink injection equipment for remanufactured ink cartridge refinish processing cooperates with the exhaust tank and the exhaust pipe to form a storage space before ink is injected into the ink cartridge, allowing ink to accumulate in the exhaust tank.The air in the ink flows upward through the gap between the exhaust pipe and the float ball in the accumulation space while the ink is being filled.The float ball can block the exhaust pipe when the ink accumulation level is too high.This design allows for an exhaust process before the ink is filled, preventing ink from splashing when the needle tube is used to fill the remanufactured ink cartridge due to the simultaneous discharge of gas and ink.