Expansion device for heat shrinkable sleeve

The utility model relates to the technical field of heat shrinkable sleeve processing, and discloses a heat shrinkable sleeve expansion device which comprises a base, a first motor fixedly installed on the side face of the base, a tensioning mechanism connected to the outer end of a lead screw, an expansion structure connected to the position, coaxial with a fan, of the inner side face of the base, and a pull plate connected into a through groove in the side face of the base. A through sliding groove is formed in the side face of the base and located at the lead screw, a sliding way is formed in the position, corresponding to the sliding groove, of the pulling plate, and an ejector block is arranged in the sliding way. According to the thermal shrinkage sleeve expansion device, the expansion mechanism and the outer end of the rotating roller are sleeved with the thermal shrinkage sleeve, then the first motor is started to drive the lead screw connected with the output end of the first motor, the rotating roll