The invention discloses a
plastic film winding device and relates to the field of plastic manufacture. The
plastic film winding device comprises a support, a feed roller, spreading rollers, a
discharge roller, and a driving motor that drives the feed roller and the
discharge roller to rotate. The feed roller is located between and higher than the spreading rollers that are disposed at a right side of the support. The feed roller rotates faster than the
discharge roller. A tensioning roller is disposed between and slightly higher than one spreading roller and the discharge roller. The tensioning roller comprises a roller body, a roller shaft, and end caps fixed to two ends of the roller shaft. The roller body defines an
air chamber, and comprises a rubber layer and steel bars fixed thereto. A plurality of bar-shaped grooves are radially formed in each end cap. Ends of the steel bars are embedded in the corresponding bar-shaped grooves. An air hole communicating with the
air chamber is formed in the roller shaft, and an air connector is disposed at an end of the roller shaft. The tensioning roller provided in the
plastic film winding device has a flexible body, i.e., is capable of deforming under pressure produced by a film; thus, the tension of the film can be controlled within a reasonable range.