A blow molding mechanism of a full-automatic plastic injection blow molding machine comprises an injection fixed mold plate, an injection movable mold plate of a horizontal injection molding machine and connecting guide posts of each mold plate, characterized in that a blow molding support is mounted on the guide posts between the injection fixed mold plate and the injection movable mold plate, two symmetrical blow molding mold plates are arranged in the blow molding support, each of the two blow molding mold plates is driven by a blow molding oil cylinder, guide rods are mounted on the blow molding mold plates, guide holes are formed in the blow molding support, the guide rods pass through the guide holes, a positioning connecting rod is mounted on the blow molding support, and the positioning connecting rod is connected with the injection movable mold plate. The technical scheme adds a blow molding mechanism to the existing injection molding machine, has an extremely simple structure, is very easy to manufacture and very convenient to install, has low cost, reliable operation and remarkable benefits, and especially has universal popularization significance.

Country Code: CN

Application Number: CN200810120103.6