The utility model discloses an air leakage detection device for a
plastic bottle. The air leakage detection device comprises an upper platform and a lower platform, an ejection mechanism is arranged on the lower platform, a fixed sleeve is fixedly arranged at the working end of the ejection mechanism, the inner
diameter of the fixed sleeve is matched with the outer
diameter of a
plastic bottle, a
pressure sensor is fixedly arranged on the inner wall of the fixed sleeve, and a controller electrically connected with the
pressure sensor is further arranged on the lower platform; a sealing rubber head is fixedly arranged on the face, facing the fixing sleeve, of the upper platform and made of
pad printing silica gel, an air passing hole is formed in the sealing rubber head, the
diameter of the bottom of the sealing rubber head is larger than that of a
bottle opening of a
plastic bottle, and the size of the air passing hole is smaller than that of the
bottle opening of the plastic
bottle. The upper platform is further provided with an inflator pump, the air outlet end of the inflator pump is connected with an air
pipe, and the end, away from the inflator pump, of the air
pipe extends into the air passing hole. The plastic bottle can be fixed, sealing can be achieved, and threads of a bottle opening cannot be damaged; the air leakage
detector is suitable for the plastic bottle
processing industry and is used for detecting whether the plastic bottle leaks air.