Metal mold cavity cleaning device

The utility model provides a cleaning device for a cavity of a metal mold, which is used for cleaning residual sand or sundries in the cavity after the metal mold is opened, and comprises a stopper, a first pipeline and a second pipeline, the blocking piece is used for covering the cavity, so that a cleaning space is formed between the blocking piece and the cavity; one end of the first pipeline penetrates through the stopper and extends into the cleaning space, and the other end is connected with a high-pressure air inlet system; a gas inlet channel is formed in the first pipeline and used for introducing high-pressure gas into the cleaning space; one end of the second pipeline is connected with the stopper, and the other end is connected with a negative-pressure exhaust system; an exhaust channel communicated with the cleaning space is formed in the second pipeline, so that high-pressure gas in the cleaning space enters the exhaust channel through negative pressure. The mode of combining high-pressure air i