The utility model discloses a preform stretching and blowing device based on a PP infusion bottle blow molding machine, comprising a stretching cylinder and a sealing cylinder. A stretching rod passes through the piston of the sealing cylinder, the lower part of the piston is connected with a sealing blowing joint, and air blowing holes are formed in the sealing blowing joint and connected with a first air blowing pipe. A sealing pressure ring is mounted at the lower part of the sealing blowing joint, the inner diameter of the sealing pressure ring is larger than the outer diameter of the mouth of the PP infusion bottle, and the bottom surface of the sealing pressure ring is in contact and sealed with a retaining ring of the PP infusion bottle preform. The stretching rod is hollow inside, with air outlet holes at its top pressing end, and a second air blowing pipe is connected to the connecting end of the stretching rod. The utility model has the beneficial effects of high bottle blowing efficiency, good sealing effect and high bottle blowing quality.
Country Code: CN
Application Number: CN201420714848.6
