Cast film flattening and spreading device

Abstract

The utility model relates to a cast film flattening and spreading device which comprises two groups of rollers connected with a bracket, the two side edges of the thin film are each provided with a pair of rollers, and the edges of the thin film are located between the pair of rollers. The pair of rollers comprises a supporting plate connected with the support, a fixed roller rotationally connected with the supporting plate and a movable roller movably connected with the supporting plate. The fixed roller is located below the film, and the movable roller is located above the film. An adjusting mechanism for adjusting the distance is arranged between the movable roller and the fixed roller; the adjusting mechanism comprises a cylinder and a movable shaft; the utility model has the beneficial effects that when a wide film is produced, the edge parts of the two sides of the film are pressed and conveyed forwards through the two groups of double rollers which are arranged in a splayed shape in front of a production line, so that the effects of removing wrinkles of the whole film breadth and flattening the film are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of film machinery, in particular to a casting film flattening and width expanding device. Background Art

[0002] At the present stage, when the winding machine of our company makes wide-width films, due to the stress in the film being released through the film edges, wrinkles and unevenness occur in the edge parts or the middle part of the film, which need to be solved. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a casting film flattening and width expanding device for flattening the film so that the edge and the middle part of the film are flat and beautiful.

[0004] To solve the above problems, the utility model adopts the following technical solutions:

[0005] A casting film flattening and width expanding device includes two groups of counter-rollers connected to a bracket; one group of counter-rollers is respectively arranged on two sides of the film, and the edges of the film are respectively located between one group of counter-rollers.

[0006] One group of counter-rollers includes a support plate connected to the bracket, a fixed roller rotatably connected to the bracket, and a movable roller movably connected to the support plate; the fixed roller is located below the film, and the movable roller is located above the film; an adjusting mechanism for adjusting the distance between the two rollers is arranged between the movable roller and the fixed roller.

[0007] Further, the adjusting mechanism includes a cylinder fixed to the support plate and a movable shaft with one end hinged to the cylinder rod of the cylinder; the middle part of the movable shaft is rotatably connected to the support plate; the other end of the movable shaft is rotatably connected to the movable roller.

[0008] Further, a rod end spherical plain bearing is fixedly connected to the cylinder rod of the cylinder; a pin shaft is arranged in the bearing hole of the rod end spherical plain bearing; a strip-shaped groove is arranged on the movable shaft, and the pin shaft is slidably connected to the strip-shaped groove.

[0009] Further, a bearing is arranged in the movable roller; the movable roller is rotatably connected to the movable shaft through the bearing.

[0010] Further, a rotating shaft is arranged on the support plate, and the middle part of the movable shaft realizes the swinging function with the support plate through the rotating shaft.

[0011] Further, a nut is arranged on the support plate, a support is arranged on the bracket, and a lead screw is rotatably connected to the support; the lead screw is in threaded transmission with the nut.

[0012] Further, a slider is fixedly connected to the lead nut, a guide rail is fixedly connected to the bracket, and the slider is slidably connected to the guide rail.

[0013] Further, the support plate is L-shaped, and an angle adjusting device is provided between the set of counter-rollers and the edge of the film. The angle adjusting device includes an arc-shaped slot and a round hole on the bottom plate of the support plate; two bolts respectively pass through the arc-shaped slot and the round hole to fix the support plate to the lead nut.

[0014] The beneficial effects of the present utility model are as follows:

[0015] When producing a wide-width film, the edges on both sides of the film are pressed and conveyed forward by two sets of counter-rollers arranged in a V-shape in the advancing direction of the production line. The edges on both sides of the film are respectively subjected to an outward tensile force, thereby removing the wrinkles across the entire width of the film and flattening the film.

[0016] By providing a cylinder, the movable roller can swing up and down. When the film just passes between the two rollers, the cylinder is started. The cylinder rod pulls down one end of the movable roller, and the other end of the movable roller swings upward, enabling the film to pass between the two rollers. After the film is wound on the core shaft, the cylinder pushes up one end of the movable roller, so that the distance between the other end of the movable roller and the fixed roller reaches the set requirement, flattening the edge part of the film.

[0017] By providing that both the movable roller and the fixed roller can rotate around their respective centers, rolling friction is formed between the two rollers and the film surface, minimizing the resistance between the film and the rollers as much as possible and avoiding affecting the winding speed of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic top view of the structure of the present utility model;

[0019] Figure 2 is a schematic front view of the structure of the left set of counter-rollers;

[0020] Figure 3 is a schematic top view of the left set of counter-rollers with the lead screw and lead nut parts removed;

[0021] Figure 4 is a schematic left view of the structure of the left set of counter-rollers;

[0022] Figure 5 is a schematic diagram of the structure when the movable roller is opened.

[0023] Explanation of the reference numerals in the drawings:

[0024] 1 - Bracket, 2 - Guide rail, 3 - Slide block, 4 - Lead screw, 5 - Nut, 6 - Support plate, 7 - Support, 61 - Cylinder, 62 - Rod end spherical plain bearing, 63 - Pin shaft, 64 - Movable roller, 65 - Movable shaft, 66 - Fixed roller, 67 - Fixed shaft, 611 - Arc slot hole, 612 - Fixed plate, 613 - Positioning bolt, 614 - Centering bolt, 615 - Limit bolt, 641 - Bearing, 651 - Strip slot, 652 - Rotating shaft. Detailed implementation mode

[0025] The following will combine the accompanying drawings in the embodiments of the present invention; the technical solutions in the embodiments of the present invention will be clearly and completely described; the described embodiments are only a part of the embodiments of the present invention; rather than all embodiments. Based on the embodiments in the present invention; all other embodiments obtained by those of ordinary skill in the art without creative work; fall within the protection scope of the present invention.

[0026] Embodiment 1

[0027] As Figures 1-5 shown

[0028] As Figure 1 shown, the arrows in the figure represent the conveying direction of the film. A casting film flattening and width expanding device includes two groups of counter-rotating rollers connected to the bracket 1; one group of counter-rotating rollers is provided on each of the two sides of the film, and the edges of the film are respectively located between one group of counter-rotating rollers.

[0029] The two groups of counter-rotating rollers have the same structure and are in an "eight" shape, arranged on both sides of the film. The film enters from the large end of the eight shape and exits from the small end of the eight shape. Only the detailed structure of the group of counter-rotating rollers on the left side will be introduced below;

[0030] As Figure 2 shown, the group of counter-rotating rollers includes a support plate 6 connected to the bracket 1, a fixed roller 66 rotatably connected to the support plate 6, and a movable roller 64 movably connected to the support plate 6;

[0031] The fixed roller 66 is located below the film, and the movable roller 64 is located above the film; when the film passes between the two rollers, it is pressed by the two rollers, so that the edges and the middle part of the film are flat; if the film is relatively soft, it can also play a role in increasing the width of the film;

[0032] An adjustment mechanism for adjusting the spacing is provided between the movable roller 64 and the fixed roller 66.

[0033] The adjustment mechanism includes a cylinder 61 whose cylinder body is fixedly connected to the support plate 6 and a movable shaft 65 whose one end is hinged to the cylinder rod of the cylinder 61; the middle part of the movable shaft 65 is rotatably connected to the support plate 6; the other end of the movable shaft 65 is rotatably connected to the movable roller 64.

[0034] A rod-end spherical plain bearing 62 is fixedly connected to the piston rod of the cylinder 61; a pin shaft 63 is arranged in the bearing hole of the rod-end spherical plain bearing 62; a strip-shaped groove 651 is arranged on the movable shaft 65, and the pin shaft 63 is slidably connected with the strip-shaped groove 651. The arrangement of the strip-shaped groove 651 and the spherical plain bearing 65 is to prevent the piston rod from jamming with the movable shaft 65 when the cylinder 61 moves vertically, which affects the swinging of the movable shaft 65 along the rotating shaft 652.

[0035] As Figure 4 shown, a bearing 641 is arranged in the movable roller 64; the movable roller 64 is rotatably connected with the movable shaft 65 through the bearing 641.

[0036] A rotating shaft 652 is arranged on the support plate 6, and the middle part of the movable shaft 65 realizes the swinging function with the support plate 6 through the rotating shaft 652.

[0037] A nut 5 is arranged on the support plate 6, a support 7 is arranged on the bracket 1, and a lead screw 4 is rotatably connected to the support 7; the lead screw 4 is in threaded transmission with the nut 5.

[0038] A slider 3 is fixedly connected to the nut 5, a guide rail 2 is fixedly connected to the bracket 1, and the slider 3 is slidably connected with the guide rail 2.

[0039] The working process of the present utility model

[0040] This application is suitable for use when winding relatively wide-width films. Because when making relatively wide-width films, the edges and the middle part are prone to wrinkling and unevenness;

[0041] When the end of the film first passes between the two rollers, to prevent blocking the smooth winding of the film onto the subsequent film reel, the piston rod of the cylinder 7 pulls downward, causing the movable shaft 65 to drive the movable roller 64 to swing upward around the rotating shaft 652, increasing the distance between the ends of the movable roller 64 and the fixed roller 66 in contact with the film, facilitating the passage of the film. After the film is wound around the paper tube of the film reel (usually three to five turns), the piston rod of the cylinder 7 pushes one end of the movable shaft 65 upward, causing the movable roller 64 to apply pressure to the film. When the film passes between the two rollers arranged in a "V" shape, the two side edges of the film will be subjected to a reverse pulling force, making the film surface flat;

[0042] The two groups of rollers arranged on both sides of the film can adjust the distance between the two groups of rollers according to the width of the film. By rotating the handwheel on the lead screw 4, the lead screw 4 rotates, driving the slider 3 fixed to the nut 5 to slide along the guide rail 2, and the slider 3 drives the support plate 6 to move, so that the edge of the film is located between the two rollers, adapting to films of different widths.

[0043] Embodiment 2

[0044] This embodiment has basically the same structure as Embodiment 1.

[0045] The difference lies in that

[0046] the support plate 6 is L-shaped, and an angle adjusting device is provided between the set of counter-rollers and the edge of the film. The angle adjusting device includes an arc-shaped slot 611 and a round hole on the bottom plate of the support plate 6, a fixing plate 612 fixed to the lead screw nut 5 with bolts, and a positioning bolt 613 threadedly connected to the fixing plate 612; the end of the positioning bolt 613 abuts against the support plate 6; a nut is provided on the positioning bolt 613 to prevent the positioning bolt 613 from loosening;

[0047] The centering bolt 614 passes through the round hole and the limit bolt 615 passes through the arc-shaped slot 611 to fix the support plate 6 and the lead screw nut 5. In this way, by loosening the two bolts, the support plate 6 can rotate around the centering bolt 614;

[0048] By loosening the centering bolt 614 and the bolt on the arc-shaped slot 611 and rotating the positioning bolt 613, the end of the positioning bolt 613 pushes the support plate 6 to rotate around the centering bolt 614, and the support plate 6 drives the two rollers to rotate, so that the angle between the two rollers and the film can be adjusted to make the center lines of the two rollers perpendicular to the moving direction of the film.

[0049] Through the provided positioning bolt 613, when it is necessary to adjust the angle between the two rollers and the film, loosen the centering bolt 614 and the limit bolt 615, rotate the positioning bolt 613, and limit the support plate 6 to rotate around the centering bolt 614 of the round hole (arc-shaped slot 611). After there is a certain deflection angle between the two rollers on the support plate 6 and the moving direction of the film, then tighten the two bolts, and the support plate 6 will not move, so that the edge of the film will exert a certain tensile force on the middle of the film.

[0050] The above; only the preferred specific embodiments of the present invention; but the protection scope of the present invention is not limited thereto; any person skilled in the art within the technical scope disclosed by the present invention; according to the technical solution of the present invention and its improved conceptions, making equivalent substitutions or changes; should be covered by the protection scope of the present invention.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0052] The above are only embodiments of the present application. Common knowledge such as specific structures and characteristics known in the art is not described in detail herein. Those of ordinary skill in the art know all the common general technical knowledge in the technical field to which the application belongs before the application date or priority date, are able to know all the prior art in this field, and have the ability to apply conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given by this application and in combination with their own abilities, perfect and implement this solution. Some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of this application, several deformations and improvements can also be made, and these should also be regarded as the protection scope of this application, and these will not affect the implementation effect of this application and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A casting film flattening and width expanding device, characterized in that, It includes two sets of opposed rollers connected to the bracket (1); one set of opposed rollers is provided on each of the two sides of the film, and the edges of the film are respectively located between one set of opposed rollers; the one set of opposed rollers includes a support plate (6) connected to the bracket (1), a fixed roller (66) rotatably connected to the support plate (6), and a movable roller (64) movably connected to the support plate (6); the fixed roller (66) is located below the film, and the movable roller (64) is located above the film; an adjusting mechanism for adjusting the spacing is provided between the movable roller (64) and the fixed roller (66).

2. The flattening and width expanding device for the cast film according to claim 1, wherein The adjusting mechanism includes a cylinder (61) whose cylinder body is fixedly connected to the support plate (6), and a movable shaft (65) whose one end is hinged to the cylinder rod of the cylinder (61); the middle part of the movable shaft (65) is rotatably connected to the support plate (6); the other end of the movable shaft (65) is rotatably connected to the movable roller (64).

3. The flattening and width expanding device for cast film according to claim 2, characterized in that, A rod end spherical plain bearing (62) is fixedly connected to the cylinder rod of the cylinder (61); a pin shaft (63) is provided in the bearing hole of the rod end spherical plain bearing (62); a strip-shaped groove (651) is provided on the movable shaft (65), and the pin shaft (63) is slidably connected to the strip-shaped groove (651); a rotating shaft (652) is provided on the support plate (6), and the middle part of the movable shaft (65) swings with the support plate (6) through the rotating shaft (652).

4. A casting film flattening and width expanding device according to claim 3, characterized in that: A bearing (641) is provided inside the movable roller (64); the movable roller (64) is rotatably connected to the movable shaft (65) through the bearing (641).

5. The flatting and width expanding device for casting film according to claim 4, wherein: A nut (5) is provided on the support plate (6), and a support (7) is provided on the bracket (1); a lead screw (4) is rotatably connected to the support (7); the lead screw (4) is in threaded transmission with the nut (5).

6. The flatting and width expanding device for casting film according to claim 5, characterized in that: A slider (3) is fixedly connected to the nut (5), and a guide rail (2) is fixedly connected to the bracket (1), and the slider (3) is slidably connected to the guide rail (2).

7. The flatting and width expanding device for casting film according to claim 5, wherein: The support plate (6) is L-shaped, and an angle adjusting device is provided between the one set of opposed rollers and the edge of the film. The angle adjusting device includes an arc-shaped slot hole (611) and a round hole provided on the bottom plate of the support plate (6), a fixing plate (612) fixed to the nut (5) with bolts, and a positioning bolt (613) threadedly connected to the fixing plate (612); a centering bolt (614) passes through the round hole, and a limit bolt (615) passes through the arc-shaped slot hole (611) to fix the support plate (6) and the nut (5); the end of the positioning bolt (613) abuts against the support plate (6); a nut for preventing the positioning bolt (613) from loosening is provided on the positioning bolt (613).

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