The application of the screen changer for the film blowing machine The film blowing screen changer is used for the production of chemical fiber, blowing film, flat film and casting film, the manufacture of pipe, sheet, wire, fiber, grain cutting line, recovery and so on. The characteristics of the screen changer of the film blowing machine 1, the series network changer is designed as a dual channel double filter structure. When it changes the network, it will replace the network without interrup