Crease-resistant film pressing device for production of POF heat shrinkage film

Abstract

The utility model relates to the technical field of thermal shrinkage film production, in particular to an anti-wrinkling film pressing device for POF thermal shrinkage film production, which comprises a mounting base, a plurality of groups of fixing plates are mounted on the base surface of the mounting base, and the fixing plates are respectively positioned on the base surface of the mounting base; according to the utility model, the thickness of the POF thermal shrinkage film at the wrinkled part is increased, so that the wrinkled part of the POF thermal shrinkage film jacks up the limiting plate, the limiting plate drives the positive electrode to move upwards, the positive electrode and the negative electrode are in contact with each other, a circuit is connected to generate current, and an electric signal generated by the current sensor is transmitted to the controller through the wire; the fixing frame is driven by the double-end threaded rod through threaded connection to move reversely, when the fixing frame moves to a proper position, the spring telescopic rod exerts downward pressure on the flattening shell, meanwhile, the double-end threaded rod rotates to exert transverse thrust on the flattening roller, and then the flattening roller flattens the POF heat shrinkage film.

Description

Technical Field

[0001] The utility model relates to the technical field of heat shrink film production, in particular to a wrinkle-proof film pressing device for producing POF heat shrink film. Background Art

[0002] PE heat shrink film is made by blowing high-pressure polyethylene with appropriate auxiliary materials. It is characterized by good toughness, high softness, good heat sealing, strong impact resistance, strong tear resistance, and not easy to be damaged. PE heat shrink film is particularly suitable for packaging large or irregular objects, solving the global problem of packaging special-shaped objects. Moreover, this new packaging method no longer requires any inner packaging or wooden boxes, greatly reducing the packaging costs of enterprises. Therefore, it has been widely used.

[0003] During the production of PE heat-shrink film, when wrinkles appear during transport, timely and effective removal of these wrinkles is crucial to ensuring the quality of the final product and the optimal winding performance. However, existing wrinkle-removal devices are often complex, require high maintenance, and are ineffective at dealing with wrinkles, making them less practical. Furthermore, current systems rely on manual monitoring to detect and activate wrinkle removal. This approach is not only inefficient but also, due to the inability to detect wrinkles in real time, results in a large number of substandard products, resulting in a waste of resources.

[0004] Therefore, a POF heat shrink film production wrinkle-proof pressing device is needed to improve the above problems. Utility Model Content

[0005] In order to solve the problem that the wrinkle-proof pressing device cannot detect the existence of wrinkles in real time during production, which will lead to the production of a large number of unqualified products and thus waste resources, the utility model provides a wrinkle-proof pressing device for POF heat shrink film production to solve the above problem.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A wrinkle-proof film pressing device for producing POF heat shrinkable film comprises a mounting base, a fixed plate mounted on the base surface of the mounting base, wherein the fixed plates are provided in multiple groups and are respectively located on the base surface of the mounting base, and rotating shafts are rotatably connected on the opposite inner walls of the fixed plates, a transmission roller is mounted on the outer wall of the rotating shaft, a POF heat shrinkable film is provided on the outer wall of the transmission roller, one end of the rotating shaft passes through the fixed plate and extends to the outer wall of the fixed plate where a gear is mounted, two groups of gears are provided and are respectively located on the outer wall of the rotating shaft, and the gears are connected by belts, the other end of the rotating shaft passes through the fixed plate and extends to the outer wall of the fixed plate where a drive motor is mounted, a controller is mounted on the outer wall of the drive motor, a detection component is mounted on the inner wall of the fixed plate, and a flattening component is mounted on one side of the detection component and located on the outer wall of the fixed plate.

[0008] As a preferred solution of the present invention, the detection component includes a mounting plate and a sliding rod, the mounting plate is installed on the side wall of the fixed plate, a first threaded rod is rotatably connected to the outer wall of the mounting plate, one end of the first threaded rod is threadedly connected to a sliding block, the sliding rod is slidably connected to the outer wall of the fixed plate, and one end of the sliding rod passes through the fixed plate and extends to the inner wall of the fixed plate and is connected to the sliding block.

[0009] As a preferred solution of the present invention, a sliding groove is provided on the outer wall of the sliding block, and a second threaded rod is rotatably connected to the outer wall of the sliding block, wherein one end of the second threaded rod passes through the sliding block and extends to the inner wall of the sliding groove and is threadedly connected to a mounting frame, a limiting hole is provided on the opposite outer wall of the mounting frame, a limiting rod is installed on the inner wall of the limiting hole, and a limiting plate is provided directly below the mounting frame and at one end of the limiting rod.

[0010] As a preferred solution of the present invention, an electrode positive pole is installed on the inner wall of the limiting plate, wherein multiple groups of electrode positive poles are arranged equidistantly from left to right and are respectively located on the inner wall of the limiting plate, and an electrode negative pole is arranged directly above the electrode positive pole and on the inner wall of the mounting frame, wherein multiple groups of electrode negative poles are arranged equidistantly from left to right and are respectively located on the inner wall of the mounting frame, and a current sensor is arranged on the outer wall of the mounting frame.

[0011] As a preferred solution of the present invention, the flattening assembly includes a limiting sleeve, which is provided in two groups and is respectively located on the outer walls of the opposite fixed plates, and a double-headed threaded rod is rotatably connected to the inner wall of the limiting sleeve.

[0012] As a preferred solution of the present invention, one end of the double-headed threaded rod passes through the limiting sleeve and extends to the outer wall of the limiting sleeve and is connected to a servo motor, wherein the servo motor is installed on the outer wall of the fixed plate and is located on one side of the drive motor.

[0013] As a preferred solution of the present invention, the opposite outer walls of the double-threaded rod are respectively threadedly connected to fixed frames, the outer walls of the fixed frames are rotatably connected to rotating rods, and the rotating rods are rotatably connected to the inner wall of the limiting sleeve.

[0014] As a preferred solution of the present invention, the outer walls of the rotating rod and the double-headed threaded rod are both rotatably connected to a limiting shell, wherein an arc-shaped protrusion is provided at the bottom of the limiting shell, a spring telescopic rod is provided on the outer wall of the fixed frame, a flattening shell is provided at the end of the spring telescopic rod, a rotating rod is rotatably connected to the opposite inner wall of the flattening shell, and a flattening roller is rotatably connected to the outer wall of the rotating rod.

[0015] As a preferred solution of the present invention, the controller is respectively connected to the current sensor, the drive motor, the electrode positive pole, the electrode negative pole and the servo motor through wires, and the connection method is electrical connection. The limit shell is located between the fixed frames, and the arc-shaped protrusions are provided in two groups and are respectively located on the opposite outer walls of the limit shell, wherein the arc-shaped protrusions are located on one side of the flattening roller, and the arc-shaped protrusions are located directly above the POF heat shrink film. The spring telescopic rods are provided in multiple groups and are respectively located on the outer walls of the fixed frames.

[0016] Compared with the prior art, the utility model can detect the wrinkles of the POF heat shrink film by arranging a detection component in the anti-wrinkle pressing device for the production of POF heat shrink film. The thickness of the POF heat shrink film at the wrinkled part increases, so that the wrinkled part of the POF heat shrink film lifts up the limit plate, and the limit plate drives the limit rod to move upward on the inner wall of the limit hole. At the same time, the limit plate drives the positive electrode to move upward, and the positive electrode and the negative electrode contact each other, so that the circuit is connected to generate current. The current sensor generates an electrical signal that is transmitted to the controller through a wire, thereby solving the problem of not being able to detect the existence of wrinkles in real time, which will lead to the production of a large number of unqualified products and cause waste of resources.

[0017] The utility model provides a flattening component in the anti-wrinkle film pressing device for producing POF heat shrink film. When the POF heat shrink film produces wrinkles, the double-headed threaded rod drives the fixed frame to move in the opposite direction through a threaded connection. When it moves to the appropriate position, the compressed spring telescopic rod expands downward, and the spring telescopic rod applies downward pressure to the flattening shell, so that the flattening shell drives the flattening roller to fit the outer wall of the POF heat shrink film. At the same time, the rotation of the double-headed threaded rod applies a lateral thrust to the flattening roller, so that the flattening roller flattens the POF heat shrink film, thereby solving the problems of the existing anti-wrinkle device often having a complex structure, high maintenance cost, poor effect in dealing with wrinkles, and low practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a side structural diagram of the present utility model;

[0020] Figure 3 For this utility model Figure 1 A magnified schematic diagram of the A structure;

[0021] Figure 4 For this utility model Figure 2 A magnified schematic diagram of the B structure;

[0022] Figure 5 For this utility model Figure 2 A magnified schematic diagram of the C structure;

[0023] Figure 6 This is a schematic diagram of the structure of the installation frame of the present invention.

[0024] Figure: 1, mounting base; 2, fixing plate; 3, rotating shaft; 4, driving roller; 5, POF heat shrink film; 6, gear; 7, driving motor; 8, controller; 9, detection component; 901, mounting plate; 902, sliding rod; 903, first threaded rod; 904, sliding block; 905, sliding groove; 906, second threaded rod; 907, mounting frame; 908, limiting hole; 909, limiting rod; 910, limiting plate ;911, positive electrode; 912, negative electrode; 913, current sensor; 10, flattening assembly; 1001, limiting sleeve; 1002, double-headed threaded rod; 1003, servo motor; 1004, fixed frame; 1005, rotating rod; 1006, limiting shell; 1007, arc-shaped protrusion; 1008, spring telescopic rod; 1009, flattening shell; 1010, rotating rod; 1011, flattening roller. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Example: See Figure 1-6The POF heat shrink film production and wrinkle-proof pressing device shown includes a mounting base 1, a fixed plate 2 is mounted on the base surface of the mounting base 1, wherein the fixed plate 2 is provided in multiple groups and respectively located on the base surface of the mounting base 1, and a rotating shaft 3 is rotatably connected on the opposite inner walls of the fixed plate 2, a transmission roller 4 is installed on the outer wall of the rotating shaft 3, a POF heat shrink film 5 is provided on the outer wall of the transmission roller 4, one end of the rotating shaft 3 passes through the fixed plate 2 and extends to the outer wall of the fixed plate 2 where a gear 6 is installed, two groups of gears 6 are provided and respectively located on the outer wall of the rotating shaft 3, and the gears 6 are connected by belts, the other end of the rotating shaft 3 passes through the fixed plate 2 and extends to the outer wall of the fixed plate 2 where a drive motor 7 is installed, a controller 8 is installed on the outer wall of the drive motor 7, a detection component 9 is installed on the inner wall of the fixed plate 2, and a flattening component 10 is installed on one side of the detection component 9 and located on the outer wall of the fixed plate 2.

[0027] In this embodiment, specific reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 The detection component 9 includes a mounting plate 901 and a sliding rod 902. The mounting plate 901 is mounted on the side wall of the fixed plate 2. A first threaded rod 903 is rotatably connected to the outer wall of the mounting plate 901. One end of the first threaded rod 903 is threadedly connected to a sliding block 904. The sliding rod 902 is slidably connected to the outer wall of the fixed plate 2, and one end of the sliding rod 902 passes through the fixed plate 2 and extends to the inner wall of the fixed plate 2 and is connected to the sliding block 904. A sliding groove 905 is provided on the outer wall of the sliding block 904. A second threaded rod 906 is rotatably connected to the outer wall of the sliding block 904, wherein one end of the second threaded rod 906 passes through the sliding block 904 and extends to the inner wall of the sliding groove 905 and is threadedly connected to the mounting frame 90 7. A limiting hole 908 is provided on the opposite outer wall of the mounting frame 907, a limiting rod 909 is installed on the inner wall of the limiting hole 908, a limiting plate 910 is provided directly below the mounting frame 907 and at one end of the limiting rod 909, an electrode positive pole 911 is installed on the inner wall of the limiting plate 910, wherein the electrode positive poles 911 are provided in multiple groups equidistant from left to right and are respectively located on the inner wall of the limiting plate 910, a electrode negative pole 912 is provided directly above the electrode positive pole 911 and on the inner wall of the mounting frame 907, wherein the electrode negative poles 912 are provided in multiple groups equidistant from left to right and are respectively located on the inner wall of the mounting frame 907, and a current sensor 913 is provided on the outer wall of the mounting frame 907.

[0028] Among them, one end of the first threaded rod 903 drives the sliding block 904 to move horizontally through a threaded connection, and one end of the second threaded rod 906 drives the mounting frame 907 to move longitudinally through a threaded connection, so that the mounting frame 907 is just above the POF heat shrink film 5, wherein the limiting plate 910 is located just above the POF heat shrink film 5, and there is a gap between the limiting plate 910 and the POF heat shrink film 5.

[0029] In this embodiment, specific reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The flattening assembly 10 includes a limiting sleeve 1001, which is provided with two groups and is respectively located on the outer walls of the opposite fixing plates 2. A double-headed threaded rod 1002 is rotatably connected to the inner wall of the limiting sleeve 1001. One end of the double-headed threaded rod 1002 passes through the limiting sleeve 1001 and extends to the outer wall of the limiting sleeve 1001, where a servo motor 1003 is connected. The servo motor 1003 is installed on the outer wall of the fixing plate 2, and the servo motor 1003 is located on one side of the drive motor 7. The opposite outer walls of the double-headed threaded rod 1002 are respectively threadedly connected to a fixing frame 1004. The fixing frame 10 04 is rotatably connected to a rotating rod 1005 on its outer wall, which is rotatably connected to the inner wall of the limiting sleeve 1001. The outer walls of the rotating rod 1005 and the double-headed threaded rod 1002 are both rotatably connected to a limiting housing 1006, wherein an arc-shaped protrusion 1007 is provided at the bottom of the limiting housing 1006. A spring telescopic rod 1008 is provided on the outer wall of the fixed frame 1004, and a flattening housing 1009 is provided at the end of the spring telescopic rod 1008. A rotating rod 1010 is rotatably connected to the inner wall opposite to the flattening housing 1009, and a flattening roller 1011 is rotatably connected to the outer wall of the rotating rod 1010.

[0030] The controller 8 is connected to the current sensor 913, the drive motor 7, the positive electrode 911, the negative electrode 912 and the servo motor 1003 through wires, and the connection mode is electrical connection, so that the device is powered on, the limit shell 1006 is located between the fixed frame 1004, and the arc-shaped protrusions 1007 are provided in two groups and are respectively located on the opposite outer walls of the limit shell 1006, wherein the arc-shaped protrusions 1007 are located on one side of the flattening roller 1011, and the arc-shaped protrusions 1007 are located directly above the POF heat shrink film 5. Under the action, when the fixed frame 1004 is in the initial position, the limiting shell 1006 on one side of the fixed frame 1004 limits the flattening shell 1009, and at the same time the arc-shaped protrusion 1007 limits the flattening roller 1011, thereby making the flattening roller 1011 away from the POF heat shrinkable film 5, so as to prevent the POF heat shrinkable film 5 and the flattening roller 1011 from contacting and rubbing to generate static electricity, thereby reducing the wrinkles of the POF heat shrinkable film 5 caused by static electricity. There are multiple groups of spring telescopic rods 1008, which are respectively located on the outer wall of the fixed frame 1004.

[0031] When the POF heat shrink film production and wrinkle-proof pressing device of this scheme is working, a transmission roller 4 is installed on the outer wall of the rotating shaft 3, and a POF heat shrink film 5 is arranged on the outer wall of the transmission roller 4. One end of the rotating shaft 3 passes through the fixed plate 2 and extends to the outer wall of the fixed plate 2 where a gear 6 is installed. The gears 6 are provided in two groups and are respectively located on the outer wall of the rotating shaft 3. The gears 6 are connected by belts. The other end of the rotating shaft 3 passes through the fixed plate 2 and extends to the outer wall of the fixed plate 2 where a drive motor 7 is installed. When the switch of the controller 8 is turned on, the controller 8 controls the drive motor 7 to operate, so that the drive shaft of the drive motor 7 drives the rotating shaft 3 to rotate, and then the rotating shaft 3 drives the transmission roller 4 to rotate, and the transmission roller 4 drives the POF heat shrink film 5 to be transported;

[0032] The first threaded rod 903 is rotatably connected to the outer wall of the mounting plate 901, and one end of the first threaded rod 903 is threadedly connected to the sliding block 904. The sliding rod 902 is slidably connected to the outer wall of the fixed plate 2, and one end of the sliding rod 902 passes through the fixed plate 2 and extends to the inner wall of the fixed plate 2 and is connected to the sliding block 904. Under the action of the first threaded rod 903, one end of the first threaded rod 903 drives the sliding block 904 to move horizontally. At the same time, a sliding groove 905 is provided on the outer wall of the sliding block 904. The outer wall of the sliding block 904 is rotatably connected to the second threaded rod 906, wherein one end of the second threaded rod 906 passes through the sliding block 904 and extends to the inner wall of the sliding groove 905 and is threadedly connected to the mounting frame 907. Under the action of the second threaded rod 906, one end of the second threaded rod 906 drives the mounting frame 907 to move longitudinally through the threaded connection. The two cooperate with each other to adjust the position of the mounting frame 907;

[0033] An electrode positive electrode 911 is installed on the inner wall of the limiting plate 910, wherein the electrode positive electrode 911 is arranged in multiple groups equidistantly from left to right and respectively located on the inner wall of the limiting plate 910, and an electrode negative electrode 912 is arranged directly above the electrode positive electrode 911 and on the inner wall of the mounting frame 907, wherein the electrode negative electrode 912 is arranged in multiple groups equidistantly from left to right and respectively located on the inner wall of the mounting frame 907, and a current sensor 913 is arranged on the outer wall of the mounting frame 907. Under the action of The thickness of the POF heat shrink film 5 at the wrinkled part increases, so that the wrinkled part of the POF heat shrink film 5 pushes up the limit plate 910, and the limit plate 910 drives the limit rod 909 to move upward on the inner wall of the limit hole 908. At the same time, the limit plate 910 drives the positive electrode 911 to move upward, and the positive electrode 911 and the negative electrode 912 contact each other, thereby connecting the circuit to generate current. The current sensor 913 generates an electrical signal that is transmitted to the controller 8 through the wire, thereby solving the problem of not being able to detect the existence of wrinkles in real time, which leads to the production of a large number of unqualified products and causes waste of resources;

[0034] One end of the double-threaded rod 1002 passes through the limiting sleeve 1001 and extends to the outer wall of the limiting sleeve 1001, and a servo motor 1003 is connected, wherein the servo motor 1003 is installed on the outer wall of the fixed plate 2, and the servo motor 1003 is located on one side of the drive motor 7. The opposite outer walls of the double-threaded rod 1002 are respectively threadedly connected to the fixed frame 1004. When the set parameters are reached, the controller 8 controls the servo motor 1003 to operate, and the driving shaft of the servo motor 1003 drives the double-threaded rod 1002 to rotate. Since the thread directions of the double-threaded rod 1002 are opposite, the fixed frame 1004 is displaced in the opposite direction. When the fixed frame 1004 moves outward, a spring telescopic rod 1008 is provided on the outer wall of the fixed frame 1004. The spring telescopic rod 1008 is provided on the outer wall of the fixed frame 1004. 08 is provided with a flattening shell 1009 at the port, and a rotating rod 1010 is rotatably connected to the opposite inner wall of the flattening shell 1009, and a flattening roller 1011 is rotatably connected to the outer wall of the rotating rod 1010. Under the action of, when the fixed frame 1004 moves to the outside of the limiting shell 1006, the compressed spring telescopic rod 1008 is unfolded downward, and the spring telescopic rod 1008 applies downward pressure to the flattening shell 1009, so that the flattening shell 1009 drives the flattening roller 1011 to fit the outer wall of the POF heat shrink film 5, and at the same time, the rotation of the double-headed threaded rod 1002 applies a lateral thrust to the flattening roller 1011, so that the flattening roller 1011 flattens the POF heat shrink film 5, thereby solving the problem that the existing anti-wrinkle device is often complex in structure, high in maintenance cost, poor in wrinkle treatment effect, and low in practicality.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wrinkle-proof film pressing device for producing POF heat shrinkable film, comprising a mounting base (1), characterized in that: A fixed plate (2) is mounted on the base surface of the mounting base (1), wherein the fixed plates (2) are provided with multiple groups and are respectively located on the base surface of the mounting base (1), and a rotating shaft (3) is rotatably connected on the opposite inner walls of the fixed plate (2), a transmission roller (4) is mounted on the outer wall of the rotation shaft (3), a POF heat shrink film (5) is arranged on the outer wall of the transmission roller (4), one end of the rotation shaft (3) passes through the fixed plate (2) and extends to the outer wall of the fixed plate (2) where a gear (6) is mounted, two groups of the gears (6) are provided and are respectively located on the outer wall of the rotation shaft (3), and the gears (6) are connected via a belt, the other end of the rotation shaft (3) passes through the fixed plate (2) and extends to the outer wall of the fixed plate (2) where a driving motor (7) is mounted, a controller (8) is mounted on the outer wall of the driving motor (7), a detection component (9) is mounted on the inner wall of the fixed plate (2), and a flattening component (10) is mounted on one side of the detection component (9) and located on the outer wall of the fixed plate (2).

2. The wrinkle-proof film pressing device for producing POF heat shrinkable film according to claim 1, characterized in that: The detection component (9) includes a mounting plate (901) and a sliding rod (902), wherein the mounting plate (901) is mounted on the side wall of the fixed plate (2), a first threaded rod (903) is rotatably connected to the outer wall of the mounting plate (901), one end of the first threaded rod (903) is threadedly connected to a sliding block (904), the sliding rod (902) is slidably connected to the outer wall of the fixed plate (2), and one end of the sliding rod (902) passes through the fixed plate (2) and extends to the inner wall of the fixed plate (2) to be connected to the sliding block (904).

3. The wrinkle-proof film pressing device for producing POF heat shrinkable film according to claim 2, characterized in that: A sliding groove (905) is provided on the outer wall of the sliding block (904), and a second threaded rod (906) is rotatably connected to the outer wall of the sliding block (904), wherein one end of the second threaded rod (906) passes through the sliding block (904) and extends to the inner wall of the sliding groove (905) and is threadedly connected to a mounting frame (907), a limiting hole (908) is provided on the opposite outer wall of the mounting frame (907), a limiting rod (909) is installed on the inner wall of the limiting hole (908), and a limiting plate (910) is provided directly below the mounting frame (907) and at one end of the limiting rod (909).

4. The wrinkle-proof film pressing device for producing POF heat shrinkable film according to claim 3, characterized in that: An electrode positive electrode (911) is installed on the inner wall of the limiting plate (910), wherein the electrode positive electrodes (911) are arranged in multiple groups at equal distances from left to right and are respectively located on the inner wall of the limiting plate (910); an electrode negative electrode (912) is arranged directly above the electrode positive electrodes (911) and on the inner wall of the mounting frame (907); wherein the electrode negative electrodes (912) are arranged in multiple groups at equal distances from left to right and are respectively located on the inner wall of the mounting frame (907); and a current sensor (913) is arranged on the outer wall of the mounting frame (907).

5. The wrinkle-proof film pressing device for producing POF heat shrinkable film according to claim 4, characterized in that: The flattening assembly (10) comprises a limiting sleeve (1001), wherein two groups of the limiting sleeves (1001) are provided and are respectively located on the outer walls of the opposite fixing plates (2), and a double-headed threaded rod (1002) is rotatably connected to the inner wall of the limiting sleeve (1001).

6. The wrinkle-proof film pressing device for producing POF heat shrinkable film according to claim 5, characterized in that: One end of the double-headed threaded rod (1002) passes through the limiting sleeve (1001) and extends to the outer wall of the limiting sleeve (1001) to be connected to a servo motor (1003), wherein the servo motor (1003) is mounted on the outer wall of the fixing plate (2), and the servo motor (1003) is located on one side of the driving motor (7).

7. The wrinkle-proof film pressing device for producing POF heat shrinkable film according to claim 6, characterized in that: The opposite outer walls of the double-headed threaded rod (1002) are respectively threadedly connected to fixed frames (1004), the outer wall of the fixed frame (1004) is rotatably connected to a rotating rod (1005), and the rotating rod (1005) is rotatably connected to the inner wall of the limiting sleeve (1001).

8. The wrinkle-proof film pressing device for producing POF heat shrinkable film according to claim 7, characterized in that: The outer walls of the rotating rod (1005) and the double-headed threaded rod (1002) are both rotatably connected to a limit housing (1006), wherein an arc-shaped protrusion (1007) is provided at the bottom of the limit housing (1006), a spring telescopic rod (1008) is provided on the outer wall of the fixed frame (1004), a flattening housing (1009) is provided at the end of the spring telescopic rod (1008), a rotating rod (1010) is rotatably connected to the opposite inner wall of the flattening housing (1009), and a flattening roller (1011) is rotatably connected to the outer wall of the rotating rod (1010).

9. The wrinkle-proof film pressing device for producing POF heat shrinkable film according to claim 8, characterized in that: The controller (8) is connected to a current sensor (913), a drive motor (7), an electrode positive electrode (911), an electrode negative electrode (912) and a servo motor (1003) through wires, and the connection method is electrical connection. The limit shell (1006) is located between the fixed frames (1004). The arc-shaped protrusions (1007) are provided in two groups and are respectively located on opposite outer walls of the limit shell (1006), wherein the arc-shaped protrusions (1007) are located on one side of the flattening roller (1011), and the arc-shaped protrusions (1007) are located directly above the POF heat shrink film (5). The spring telescopic rods (1008) are provided in multiple groups and are respectively located on the outer walls of the fixed frames (1004).

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