The invention discloses a plastic thin film opening and flattening device and a plastic thin film online side
cutting and flattening method, and relates to the technical field of plastic thin film production
processing. The plastic thin film opening and flattening device comprises a hopper, an extruder, a mould, a herringbone clamp plate, a traction roller, a horizontal
cutting frame, a guiding roller, a triangular frame body, traction rollers, a horizontal
cutting frame, a guiding roller, a triangular frame body,
involute guide rollers and a coiling device. A horizontal side cutting mechanismis arranged on an operation platform of the traction roller, and comprises a horizontal slide rod and a tool rest sliding chute with a cutter; the cutter is used for unilaterally cutting a cylindrical film extruded through the traction roller into a single cutting film; after passing through the guiding roller, the single cutting film enters the
involute guide rollers under the guiding roller soas to form a thin film through the
involute guide rollers; and a thin film opening and flattening mechanism is connected under the involute guide rollers. According to the plastic thin film opening and flattening device and the plastic thin film online side cutting and flattening method provided by the invention, in the process of opening and flattening a thin film, the friction forces of a film surface and arc-shaped opening rods are uniform, the thin film is not easy to scratch, and the occurrence of the phenomenon of gauffer and the problem of multiple creases caused by the imbalance of friction forces of various points of a middle cutting type trapezoid display rack are avoided.