The utility model relates to the technical field of blow molding and air blowing, and discloses an air blowing device for a TPU blow molding unit, comprising a carrier plate. A push rod motor and an air pump are respectively fixedly installed on both sides of the bottom of the carrier plate, and a hollow block is placed on one side of the bottom of the push rod motor. An air blowing head is fixedly installed at the bottom of a transmission shaft of the push rod motor, and a blow molding needle is communicated with the bottom of the air blowing head. The utility model is provided with an electromagnet, a spring and a protection block. During operation, the electromagnet is turned on to move the protection block upward completely, exposing the blow molding needle for use. When air blowing and blow molding are suspended, the electromagnet is turned off, and the guide block and L-shaped rod move downward under the spring force, so that the protection block covers the outer side of the bottom end of the blow molding needle. This structure protects the blow molding needle from external impact damage, meeting factory use requirements. Meanwhile, the spring reduces the falling speed to prevent deformation of iron parts under long-term stress.
Country Code: CN
Application Number: CN202322701804.1
