Powder material air extractor

The utility model relates to the field of packaging equipment, and particularly discloses a powder material air extractor which comprises a frame, a metering scale with a collecting hopper, a spiral discharging pipe and a start-stop mechanism, and a hopper lifting device with a movable hopper connecting seat, a bagging hopper, a bag opening mechanism, a bag clamping mechanism, a limiting sensor assembly and a bag opening position sensor. And the air exhaust lifting device is provided with an air exhaust pipe connecting seat and an air exhaust pipe group. Due to the fact that the air exhaust lifting device with the air exhaust pipe set is arranged in the machine frame, the air exhaust pipe set can stretch into a packaging bag to exhaust air after the bag opening mechanism of the hopper lifting device opens the bag and the bag is clamped by the bag clamping mechanism 34, and the spiral discharging pipe is further arranged in the metering scale. Not only can quantitative blanking of powder be realized, but also