Stretching device of PI composite film

The utility model discloses a PI composite film stretching device which comprises a base, a first supporting column is arranged at one end of one side of the top of the base, a second supporting column matched with the first supporting column is arranged at the other end of one side of the top of the base, and a cooling box is installed in the middle of the top of the base. The first rotating shaft is driven to rotate by rotating the rotating disc, then the screw rod is driven by the matching of the bevel gear set, so that the threaded sleeve matched with the screw rod moves up and down in thescrew rod in a reciprocating manner, the distance between the lifting wheel and the power wheel can be adjusted, and the lifting wheel can be driven to move up and down according to the gear ratio between the threaded sleeve and the screw rod. According to the PI composite film processing device, the dial on the turntable is used for accurately calculating the height of the lifting wheel when theturntable rotates by one