SU1255453A1 - Device for liquid treatment of polymeric film - Google Patents

Description

The invention relates to devices for treating films, preferably polymeric, in a liquid medium and can be used in the manufacture of thin, low-strength films that have shrinkability when they interact with the processing medium.

The aim of the invention is to increase the quality of the processing of the film by providing uniform tension as it moves through the bath.

FIG. 1 shows the proposed device, a general view in section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows cuts BB in FIG. 2

The device comprises a bath 1 with an inlet 2 and an outlet 3. In the bath 1, the rolls 4 are arranged in two rows with a cavity 5 mounted rotatably on axes 6 fixedly mounted on the walls 7 of the bath 1. The axes 6 are connected by means of flanges 8 to collectors 9 connected to the pump 10.

Each axis 6 is provided with a fluid supply channel 11 into the cavity 5 of the roll 4 and the holes 12. In the walls of each roll 4, they are evenly mounted around the circumference of the nozzle 13 tangentially to the surface of the roll 4 in the direction opposite to the direction of rotation of the roll 4.

Opposite the nozzles 13 in the bath I are installed reflective HOSE 14, made in the form of a hollow cone and mounted concentrically to the roll 4 and the nozzles 13. At the same time, a gap 15 is made between the inner surface of the cone of the sleeve 14 and the roller 4. In the pipelines connecting the pump 10 to the manifolds 9, valves 16-18 are mounted to regulate the flow of fluid to the manifolds 9 and in the cavity 5 of the rolls 4.

The device works as follows.

The processed film 19 is charged into the device through the inlet 2, placed on the rolls 4 in the bath 1 and withdrawn from the device through the outlet 3 of the bath 1. Then the pump 10 is turned on, which takes the liquid from the bath 1 and delivers it through pipelines with valves 16-18, in the collectors 9, from where fluid through the channels 11 and through the holes 12 in the axis x 6 enters the cavity 5 of the rolls 4.

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The pressurized fluid through the nozzles 13 flows out of the cavity 5 of the roll 4 to the outside with an intense jet that creates a reactive force acting on

the nozzle 13 and the roll 4 and directed along the longitudinal axis of the nozzle 13. Since each nozzle 13 is tangential to the surface of the roll 4 in the direction opposite to the roll 4, the jet force emanating from the nozzles 13 creates a moment directed in the direction of rotation of the roll 4 Since the rolls 4 are installed on the axis x 6 with the possibility of free rotation and all the nozzles 13 are located relative to the axes of rotation of the rolls 4 evenly, and the pressure and capacity of the fluid flowing out of the nozzles 13 are equivalent for all the rolls 4, then the torque acting on each of the rolls 4 is the same. If necessary, change the moment value

0 on certain rolls 4 regulate the flow of fluid to these rolls 4 by means of valves 16 and 17. As a result of the interaction of the rotating roll 4 with the film 19, the latter is moved through the bath 1 filled with liquid, which

5 processes the film as it moves. The tension of the film 19 in this case is determined by the magnitude of the rotating moment of the roll 4. The liquid from the nozzles 13 flows out evenly throughout the entire processing time of the film. The moment, the rotating roller 4, and the tension created by it of the moving film 19 are constant during the whole period of processing the film 19. In case of shrinkage of the film 19 during its processing, the roller 4 may, depending on the degree and speed of shrinkage of the film 19, slow down, temporarily stop or even change the direction of its rotation. But the moment acting on the roller 4 and, consequently, the tension of the film 19 interacting with this roller 4, does not change, which prevents excessive stretching and breaking of the film 19. The jets of fluid that have flowed out of the nozzles 13 are moved to the side of the reflective sleeves 14 and, interacting with them, deviate inside the bath 1 towards the film 19. As a result

5, the interaction of the jet with the liquid of the bath 1 forms vortices of liquid intensively washing the surface of the film.

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Claims (1)

DEVICE FOR LIQUID PROCESSING OF POLYMER FILM, containing a bath with inlet and outlet openings for a film, hollow rolls, nozzles and collectors connected to a pump, rotatable on the axes, connected to the pump, characterized in that in order to improve the quality of film processing by providing uniform tension when moving through the bath, in it each axis is made with a fluid supply channel into the roll cavity and connected to the collector, nozzles are mounted in the walls of each roll, uniformly around the circumference along the tang solid to its surface in the direction opposite to the direction of rotation, and the device is equipped with reflective sleeves arranged concentrically with a gap relative to each roll opposite the nozzles and each made in the form of a hollow cone, the base of which is directed to the center of the roll. bj sp sl 4 ^ SP FO figure 1