Thermal shrinkage device and thermal shrinkage process of double-sided marked thermal shrinkage tube

The invention discloses a thermal shrinkage device for a double-sided marked thermal shrinkage tube and a thermal shrinkage process of the thermal shrinkage device. A clamping air cylinder of a positioning heat insulation assembly is fixed to an air cylinder fixing plate, and the clamping air cylinder is connected with a positioning clamp and an air claw; a sliding block of the thermal shrinkage assembly is fixed to the upper end of a vertical plate, a sliding rail and the sliding block are connected in a matched mode to form a kinematic pair, the sliding rail is fixed to the vertical plate, and a fan is fixed above a heating pipe. The air guide nozzle is fixed below the heating pipe, and air outlet nozzles on the two sides of the air guide nozzle are symmetrically arranged on the two sides of the positioning clamp with the center of the air claw as the symmetry center. According to the product, through cooperative arrangement of the positioning heat insulation assembly and the heat shrinkage assembly, precis