Tension adjusting assembly of PET film gluing machine

Abstract

The utility model relates to the technical field of PET (Polyethylene Terephthalate) film manufacturing equipment, in particular to a tension adjusting component of a PET film gluing machine, which comprises a rack and at least two conveying guide rollers arranged on two sides of the rack, the rotating plate is rotationally connected with the rack; and the tensioning roller is rotationally arranged on one side of the rotating plate and located between the conveying guide rollers. The rotating plate is rotationally arranged, the tensioning roller is rotationally arranged at one end of the rotating plate, the counterweight part is arranged on one side of the rotating plate, acting force attached to the PET film can be applied to the tensioning roller through the gravity of the counterweight part, and when the PET film is loosened, the rotating plate can drive the tensioning roller to be finely adjusted upwards or downwards, so that the tension of the PET film is kept; and when the tension of the PET film is large enough, the PET film can generate pressure on the tensioning roller, and when the pressure exceeds the weight of the balance weight part, the tensioning roller can drive the rotating plate to rotate, so that the rotating plate tends to be horizontal, and the tension is dynamically adjusted.

Description

Technical Field

[0001] This utility model relates to the technical field of PET film manufacturing equipment, and in particular to a tension adjustment component for a PET film coating and bonding machine. Background Technology

[0002] To prevent longitudinal or transverse wrinkles in the PET film after coating, existing PET film coating machines require appropriate adjustment of the PET film's conveying tension (tension) during the coating process to achieve the best coating effect without wrinkles. Currently, most tension adjustment devices mainly use multiple conveyor rollers arranged in a "V" or ridge-like conveying path. The tension is adjusted by changing the spacing between the conveyor rollers. The advantage of this tension adjustment method is that once the adjustment is completed, the tension of the PET film remains constant and will not change during the conveying process.

[0003] However, during the transport process, the tension of PET film fluctuates slightly due to factors such as the transport structure and the material itself. For example, there are deviations in the manufacturing and assembly precision of traction rollers and guide rollers, as well as the flatness and straightness of the base assembly, the perpendicularity of the wall panel to the base assembly, and the horizontality and parallelism of each roller. The properties of the film raw material itself, such as the fluctuation of the film's elastic modulus, and the changes in the thickness, width, and length of the material before and after coating, all lead to tension changes. In summary, the tension of PET film fluctuates slightly during the transport process and needs to be adjusted constantly as needed. Therefore, constant tension adjustment is no longer sufficient to meet the tension control requirements of the coating and bonding machine. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a tension adjustment component for a PET film coating and bonding machine, so as to solve the technical problem that the tension adjustment component of the PET film coating and bonding machine cannot adapt to the fluctuating tension adjustment requirements.

[0005] To achieve the above objectives, this utility model provides a tension adjustment component for a PET film coating and bonding machine, comprising:

[0006] A frame and at least two conveying guide rollers disposed on both sides of the frame;

[0007] A rotating plate rotatably connected to the frame;

[0008] A tensioning roller located on one side of the rotating plate is rotated. The tensioning roller is positioned between the conveying guide rollers. The tensioning roller is either higher or lower than the conveying guide rollers in the vertical direction. There is an eccentric gap between the rotation axis of the tensioning roller and the rotation axis of the rotating plate.

[0009] A counterweight is provided on the other side of the rotating plate. The counterweight is used to apply a force to the rotating plate relative to the frame so that the end of the rotating plate with the tension roller is raised or lowered, thereby applying tension to the PET film through the tension roller.

[0010] As a preferred embodiment of this utility model, the frame includes:

[0011] The base and the first brackets located on both sides of the upper end of the base;

[0012] A second bracket is provided at the upper end of the base and between the first brackets. The surface of the second bracket is provided with a rotating groove, which is connected to a rotating shaft bearing provided on the outside of the rotating plate. An end groove is provided on the inner side of the rotating plate, which is rotatably connected to the end shaft of the tension roller.

[0013] As a preferred embodiment of this utility model, a clamping mechanism for clamping a counterweight is provided on one side of the rotating plate, the clamping mechanism comprising:

[0014] A connecting shaft is located on the outside of the rotating plate;

[0015] A clamping body is provided with a connecting groove, which is rotatably engaged with a connecting shaft;

[0016] A fixed clamping plate connected at one end to the clamping body;

[0017] A movable clamping plate with one end slidingly engaged with a groove provided in the clamping body, and a clamping groove is provided between the movable clamping plate and the fixed clamping plate;

[0018] A threaded post, one end of which is rotatably disposed in the slide groove and engages with an internal threaded groove formed on the surface of the movable clamping plate.

[0019] As a preferred embodiment of this utility model, the counterweight includes a counterweight block and a connecting rod connected to the counterweight block, wherein the connecting rod is matched with the clamping groove.

[0020] As a preferred embodiment of this utility model, the rotating plate includes a first rotating plate and a second rotating plate that are telescopically connected to each other, and the tension adjustment assembly further includes an adjustment mechanism for adjusting the distance between the first rotating plate and the second rotating plate, thereby adjusting the eccentric distance.

[0021] As a preferred embodiment of this utility model, the adjustment mechanism includes:

[0022] A guide rod with one end connected to the second rotating plate, and the other end of the guide rod slidingly engaging with a guide groove formed in the first rotating plate;

[0023] A screw with one end rotatably connected to the second rotating plate, and the other end of the screw being threaded into a threaded groove in the first rotating plate;

[0024] An adjusting nut is fixedly connected to one end of the screw.

[0025] As a preferred embodiment of this utility model, the connecting shaft is provided with two end plates, and the two end plates form a limiting space for limiting the clamping body.

[0026] As a preferred embodiment of this utility model, the rotating plate has two plates arranged symmetrically about the base, a fixing plate is provided between adjacent rotating plates, and a tensioning roller is provided at each of the two ends of the rotating plate.

[0027] The beneficial effects of this utility model are as follows: By rotating a rotating plate, a tensioning roller is rotatably mounted at one end of the rotating plate, and a counterweight is set on one side of the rotating plate. The weight of the counterweight applies a force to the tensioning roller to adhere to the PET film. When the PET film is loose, the rotating plate will drive the tensioning roller to make slight adjustments up or down, thereby maintaining the tension of the PET film. When the tension of the PET film is large enough, the PET film will exert pressure on the tensioning roller. When this pressure exceeds the weight of the counterweight, the tensioning roller will drive the rotating plate to rotate, making the rotating plate tend to be horizontal, thereby achieving dynamic adjustment of tension. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the external three-dimensional structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the external three-dimensional structure of the present invention;

[0031] Figure 3 This is a partial three-dimensional structural diagram of the first and second rotating plates of this utility model;

[0032] Figure 4 This is a partial three-dimensional structural diagram of the clamp body, fixed clamping plate and movable clamping plate of this utility model;

[0033] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0034] The markings in the diagram are as follows: 1. Base; 2. First support; 3. Conveyor roller; 4. PET film; 5. Second support; 6. First rotating plate; 7. Second rotating plate; 8. Rotating shaft; 9. Rotating groove; 10. Guide rod; 11. Guide groove; 12. Screw; 13. Threaded groove; 14. Adjusting nut; 15. End groove; 16. Tensioning roller; 17. Connecting shaft; 18. End plate; 19. Clamp body; 20. Connecting groove; 21. Fixed clamping plate; 22. Movable clamping plate; 23. Clamping groove; 24. Counterweight; 25. Connecting rod; 26. Threaded column; 27. Internal threaded groove; 28. Fixed plate; 29. ​​Slide groove. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0036] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] like Figure 1 and Figure 2 As shown, a tension adjustment assembly for a PET film coating and bonding machine includes: a frame and at least two conveying guide rollers 3 disposed on both sides of the frame; a rotating plate rotatably connected to the frame; a tension roller 16 rotatably disposed on one side of the rotating plate, the tension roller 16 being located between the conveying guide rollers 3, the tension roller 16 being higher or lower than the conveying guide rollers 3 in the vertical direction, and an eccentric gap existing between the rotation axis of the tension roller 16 and the rotation axis of the rotating plate; and a counterweight disposed on the other side of the rotating plate, the counterweight being used to apply a force relative to the frame to the rotating plate, so that the end of the rotating plate with the tension roller 16 is tilted up or pressed down, thereby applying tension to the PET film 4 through the tension roller 16;

[0038] The above technical solution can dynamically adjust the tension on the PET film 4. Taking the counterweight and tension roller 16 symmetrically arranged, and taking the case where there is only one tension roller 16, first refer to... Figure 1 As shown, the PET film 4 to be conveyed passes sequentially through the left conveying guide roller 3, the tensioning roller 16, and the right conveying guide roller 3. A counterweight is suspended at one end of the rotating plate, causing the rotating plate to rotate. This causes the tensioning roller 16 to tilt upwards, lifting the PET film 4 and forming an inverted "V" shaped conveying path. When the PET film 4 is loose, the rotating plate will cause the tensioning roller 16 to rotate clockwise and adjust upwards slightly under the action of the counterweight, thus maintaining the tension of the PET film 4. When the tension of the PET film 4 is large enough, the PET film 4 will exert pressure on the tensioning roller 16. When this pressure exceeds the weight of the counterweight, the tensioning roller 16 will cause the rotating plate to rotate counterclockwise, making the rotating plate tend to be horizontal, thereby achieving dynamic tension adjustment.

[0039] It should be noted that the tension of this device is mainly determined by the rotation angle and the rotation radius. The rotation angle is the rotation angle of the tension roller 16 around the rotation axis of the rotating plate, and the rotation radius is the eccentricity between the rotation axis of the tension roller 16 and the rotation axis of the rotating plate. The rotation angle and the rotation radius together determine the tension of the tension roller 16 on the PET film 4. More precisely, the larger the rotation radius of the tension roller 16, the greater the height difference between it and the conveying guide roller 3 when rotating by the same angle, and the greater the tension generated on the PET film 4. When the rotation radius of the tension roller 16 is small, the tension it generates on the PET film 4 is less than that of the former when rotating by the same angle. In addition, the influence of the rotation angle on the tension is mainly reflected in the following aspects: when the rotating plate is in a vertical state, the rotation angle is 90 degrees, the vertical height difference between the tension roller 16 and the conveying guide roller 3 is the largest, and the tension of the tension roller 16 on the PET film 4 is the largest. Similarly, when the rotating plate is in a horizontal state, the rotation angle is zero, the vertical height difference between the tension roller 16 and the conveying guide roller 3 is the smallest, and the tension of the tension roller 16 on the PET film 4 is the smallest.

[0040] It should also be understood that the main function of the counterweight is to provide rotational force for the rotating plate, ensuring that the rotating plate can always drive the tension roller 16 to contact the PET film 4. The weight of the counterweight determines whether the tension roller 16 can generate effective tension on the PET film 4. More precisely, the weight of the counterweight cannot be too small, otherwise it will not be able to generate sufficient thrust on the tension roller 16, thus preventing the tension roller 16 from generating effective tension on the PET film 4. Conversely, the weight of the counterweight should not be too large, otherwise the thrust of the tension roller 16 will be too large, which may cause deformation of the PET film 4 or even cause the PET film 4 to break. Therefore, it is necessary to select a counterweight of appropriate weight according to the different tension requirements of different film materials.

[0041] like Figure 2As shown, in this embodiment, the frame includes: a base 1 and first brackets 2 disposed on both sides of the upper end of the base 1; a second bracket 5 disposed on the upper end of the base 1 and between the first brackets 2, the surface of the second bracket 5 is provided with a rotating groove 9, the rotating groove 9 is connected to a rotating shaft 8 disposed on the outer side of the rotating plate, and the inner side of the rotating plate is provided with an end groove 15, the end groove 15 is rotatably connected to the end shaft of the tension roller 16.

[0042] The above technical solution allows the conveying guide roller 3 and the rotating plate to be rotatably mounted on the base 1. By setting the first bracket 2, the conveying guide roller 3 can be rotatably connected to the first bracket 2. The rotating shaft 8 on the outer side of the second bracket 5 can rotate around the rotating groove 9 on the surface of the second bracket 5.

[0043] like Figure 4 and Figure 5 As shown, in this embodiment, a clamping mechanism for clamping a counterweight is provided on one side of the rotating plate. The clamping mechanism includes: a connecting shaft 17 located on the outside of the rotating plate; a clamping body 19 with a connecting groove 20, the connecting groove 20 being rotatably engaged with the connecting shaft 17; a fixed clamping plate 21 with one end connected to the clamping body 19; a movable clamping plate 22 with one end slidably engaged with a sliding groove 29 in the clamping body 19, a clamping groove 23 being provided between the movable clamping plate 22 and the fixed clamping plate 21; and a threaded post 26 with one end rotatably disposed in the sliding groove 29 and engaged with an internal threaded groove 27 on the surface of the movable clamping plate 22. The counterweight includes a counterweight block 24 and a connecting rod 25 connected to the counterweight block 24, the connecting rod 25 being matched with the clamping groove 23.

[0044] The above technical solution facilitates the disassembly and installation of the counterweight 24. Taking disassembly as an example, when the counterweight 24 needs to be disassembled, first rotate the threaded column 26 to make it engage with the internal threaded groove 27 inside the movable clamping plate 22, thereby driving the movable clamping plate 22 to slide along the sliding groove 29 inside the clamping body 19, so that the movable clamping plate 22 and the fixed clamping plate 21 can be separated from each other, thereby disassembling the connecting rod 25 of the counterweight 24 from the clamping groove 23, thus realizing the disassembly of the counterweight 24. It should be noted that, as mentioned above, it is necessary to select the appropriate weight of the counterweight according to the different tension requirements of the film of different materials. Therefore, the counterweight can be replaced in this way.

[0045] like Figure 3 and Figure 4 As shown, in this embodiment, two end plates 18 are provided on the connecting shaft 17, and the two end plates 18 form a limiting space for limiting the clamping body 19.

[0046] The above technical solution can restrict the movement of the clamp body 19 by the end plate 18, preventing the clamp body 19 from falling off the connecting shaft 17.

[0047] like Figure 3 As shown, in this embodiment, the rotating plate includes a first rotating plate 6 and a second rotating plate 7 that are telescopically connected to each other. The tension adjustment assembly also includes an adjustment mechanism for adjusting the distance between the first rotating plate 6 and the second rotating plate 7, thereby adjusting the eccentric distance. Specifically, the adjustment mechanism includes: a guide rod 10 with one end connected to the second rotating plate 7, and the other end of the guide rod 10 slidingly engaging with a guide groove 11 formed in the first rotating plate 6; a screw 12 with one end rotatably connected to the second rotating plate 7, and the other end of the screw 12 threadedly engaging with a threaded groove 13 formed in the first rotating plate 6; and an adjustment nut 14 fixedly connected to one end of the screw 12.

[0048] The above technical solution can adjust the rotation radius of the tension roller 16 around the rotation axis of the rotating plate. Taking the increase as an example, when it is necessary to increase the rotation radius, the adjusting nut 14 is rotated to drive the screw 12 to rotate. The screw 12, in conjunction with the threaded groove 13, drives the second rotating plate 7 away from the first rotating plate 6. In this embodiment, since the tension roller 16 is set in the second rotating plate 7, when the second rotating plate 7 moves away from the first rotating plate 6, the tension roller 16 moves away from the rotation axis 8 of the first rotating plate 6 at the same time, thereby increasing the distance between the tension roller 16 and the rotation axis 8.

[0049] like Figure 1 and Figure 2 As shown, in this embodiment, there are two rotating plates arranged symmetrically about the base 1, and a fixing plate 28 is provided between adjacent rotating plates. A tensioning roller 16 is provided at each of the two ends of the rotating plates.

[0050] The above technical solution can better adjust the tension of the PET film 4. By setting two rotating plates, the two ends of the tension roller 16 can be supported, improving the connection stability of the tension roller 16. At the same time, by using two tension rollers 16, the PET film 4 can be formed into two "V" shaped conveying paths, resulting in better tensioning effect.

[0051] Working principle: When using it, first refer to... Figure 1As shown, the PET film 4 to be conveyed passes sequentially through the left conveying guide roller 3, the tensioning roller 16, and the right conveying guide roller 3, so that the PET film 4 forms at least a ridge-shaped conveying path. Then, the counterweight 24 is suspended outside the first rotating plate 6. The weight of the counterweight 24 causes the first rotating plate 6 to rotate around the rotating shaft 8. The first rotating plate 6 and the second rotating plate 7 rotate synchronously, so that the second rotating plate 7 drives the tensioning roller 16 to tilt up, lifting the PET film 4. When the PET film 4 is loose, the tensioning roller 16 has room to move upward. Under the action of the counterweight, the rotating plate will drive the tensioning roller 16 to make a slight upward adjustment, so that the PET film 4 maintains tension. When the tension of the PET film 4 is large enough, the PET film 4 will exert downward pressure on the tensioning roller 16. When this pressure exceeds the weight of the counterweight, the tensioning roller 16 will drive the rotating plate to rotate, so that the rotating plate tends to be horizontal, thereby realizing dynamic adjustment of tension.

[0052] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0053] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tension adjustment assembly for a PET film coating and bonding machine, comprising: A frame and at least two conveying guide rollers (3) located on both sides of the frame; The tension adjustment assembly is characterized in that it further includes: A rotating plate rotatably connected to the frame; The tension roller (16) located on one side of the rotating plate is rotated. The tension roller (16) is located between the conveying guide rollers (3). The tension roller (16) is higher or lower than the conveying guide rollers (3) in the vertical direction. There is an eccentric gap between the rotation axis of the tension roller (16) and the rotation axis of the rotating plate. A counterweight is provided on the other side of the rotating plate. The counterweight is used to apply a force to the rotating plate relative to the frame so that the end of the rotating plate with the tension roller (16) is raised or lowered, thereby applying tension to the PET film (4) through the tension roller (16).

2. The tension adjustment assembly of the PET film coating and bonding machine according to claim 1, characterized in that, The rack includes: The base (1) and the first bracket (2) disposed on both sides of the upper end of the base (1); A second support (5) is provided at the upper end of the base (1) and between the first support (2). A rotating groove (9) is provided on the surface of the second support (5). The rotating groove (9) is connected to the rotating shaft (8) on the outside of the rotating plate. An end groove (15) is provided on the inner side of the rotating plate. The end groove (15) is rotatably connected to the end shaft of the tension roller (16).

3. The tension adjustment assembly of the PET film coating and bonding machine according to claim 1, characterized in that, One side of the rotating plate is provided with a clamping mechanism for clamping the counterweight, the clamping mechanism including: A connecting shaft (17) is located on the outside of the rotating plate; A clamping body (19) with a connecting groove (20) is provided, and the connecting groove (20) is rotatably engaged with the connecting shaft (17); A fixed clamping plate (21) connected at one end to the clamping body (19); A movable clamping plate (22) with one end slidingly engaged with a sliding groove (29) in the clamping body (19), and a clamping groove (23) is provided between the movable clamping plate (22) and the fixed clamping plate (21); A threaded post (26) with one end rotatably disposed in the slide groove (29) and engaged with the internal threaded groove (27) opened on the surface of the movable clamping plate (22).

4. The tension adjustment assembly of the PET film coating and bonding machine according to claim 3, characterized in that, The counterweight includes a counterweight block (24) and a connecting rod (25) connected to the counterweight block (24), the connecting rod (25) being matched with the clamping groove (23).

5. The tension adjustment assembly of the PET film coating and bonding machine according to claim 2, characterized in that, The rotating plate includes a first rotating plate (6) and a second rotating plate (7) that are telescopically connected to each other. The tension adjustment assembly also includes an adjustment mechanism for adjusting the distance between the first rotating plate (6) and the second rotating plate (7), thereby adjusting the eccentric distance.

6. The tension adjustment assembly of the PET film coating and bonding machine according to claim 5, characterized in that, The adjustment mechanism includes: A guide rod (10) is connected at one end to the second rotating plate (7), and the other end of the guide rod (10) is slidably engaged with a guide groove (11) opened in the first rotating plate (6); A screw (12) is rotatably connected to the second rotating plate (7) at one end, and the other end of the screw (12) is threaded into a threaded groove (13) opened in the first rotating plate (6); An adjusting nut (14) is fixedly connected to one end of the screw (12).

7. The tension adjustment assembly of the PET film coating and bonding machine according to claim 4, characterized in that, Two end plates (18) are provided on the connecting shaft (17), and the two end plates (18) form a limiting space for limiting the clamping body (19).

8. The tension adjustment assembly of the PET film coating and bonding machine according to claim 5, characterized in that, The rotating plate has two plates and is symmetrically arranged about the base (1). A fixing plate (28) is provided between adjacent rotating plates. A tensioning roller (16) is provided at each of the two ends of the rotating plate.

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