Cast film mechanical winding device
Corona treatment device: cast film after corona treatment, can improve the surface tension of the film to improve the printing of the film and together with other materials a force, thereby increasing the film printing fastness of the peel strength of the composite material. The surface tension of the treated film is required to reach 32-58 mN / m, usually between 38-44 mN / m. It should be noted that corona-treated films are not good for soldering. Corona treatment will lead. 1 a corona treatment roller; 2 a film; 3 a discharge electrode; 4 a corona. The temperature of the film from the processor is increased, so cooling is to be strengthened before the film is taken up.
Winding device: The film adopts the initiative winding (shaft center coiling) form, in order to adapt to the casting film width and high production line speed characteristics, winding devices are generally automatic or semi-automatic cutting, changing the volume. Automatic double-roll change applications more. Single roller automatic roll change sometimes have applications. The film roll is usually 300-800 mm in diameter.
The film winding device also includes a film cutting device. Film cutting methods are generally: electric cutting method and blade cutting method. Electrothermal cutting method is the use of electric wire heat the film blown blade cutting method has artificial cutting and mechanical cutting, mechanical cutting is the use of compressed air to promote the cutting blade along the film to move quickly to complete the transverse direction. Since the film is continuously moved in the winding direction, the shape of the end of the film after cutting is beveled. Cut the film while blowing the wind, so that cut the film close to the new mandrel roll start winding. Film winding is the key to control tension, tension is too large or too small will affect the quality of the film. The general winding device has a tension adjustment mechanism, the film winding tension control at 100 ~ 200 N, the use of torque motor to ensure a constant winding tension.
Other ancillary equipment: casting molding equipment, in addition to the above-mentioned device, as well as flattening roll, roll guide roller and so on. Roller is to prevent roll wrinkles when rolling the film. Roller is to prevent roll wrinkles when rolling the film. Flattening roller flattened roller with herringbone, curved roller and so on. Herringbone flat roll roller surface with left and right groove. The curved roller is a roller whose axis is curved into an arc shape. During the rotation, the arched side always faces the film, and the roller camber angle is about 15 ° -30 °.
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