Automatic deviation rectifying and flattening winding device for CPP cast film

Abstract

The application discloses a kind of CPP cast film automatic deviation correction flattening winding device, belong to winding technical field, including rack, flattening roller, deviation correction roller and tensioning roller of being installed with axial movement on rack, detection roller is installed on rack, and winding roller is installed on rack, CPP cast film is sequentially through flattening roller, deviation correction roller, tensioning roller and detection roller, flattening roller, deviation correction roller and tensioning roller are arranged in triangle;Flattening roller, deviation correction roller and tensioning roller are all equipped with annular groove, retractable mechanism is fixedly connected on rack, retractable mechanism and the detection component signal connection of detection roller, the end of retractable mechanism is installed with mounting seat, annular air bag is equipped in annular groove, three poking members are installed on mounting seat, poking member extends into annular groove respectively, and extrude annular air bag, the outer surface of annular air bag extends to annular groove outside.The application has the advantages of synchronous deviation correction, anti-skid, prevent material deformation and tear.

Description

Technical Field

[0001] This invention belongs to the field of winding technology, and particularly relates to an automatic correction and leveling winding device for CPP cast film. Background Technology

[0002] CPP cast film is a non-stretched, non-oriented flat extruded film produced by melt casting and rapid cooling. It boasts advantages such as high transparency, good barrier properties, and excellent temperature resistance, and is widely used in food packaging, daily chemical packaging, and electronic material coating. In the industrial production of CPP cast film, the winding process is crucial in determining the appearance quality, dimensional accuracy, and lifespan of the finished film. During high-speed continuous conveying and winding, the film is highly susceptible to defects such as lateral shift, wrinkles, and loosening due to factors such as equipment vibration, material tension fluctuations, roller installation deviations, and airflow interference. Therefore, the industry commonly incorporates a web-correcting mechanism into winding equipment to ensure flat and regular film winding.

[0003] Currently, most existing CPP cast film winding and correction equipment adopts a correction structure with a single correction roller moving axially, relying solely on the lateral displacement of the independent correction roller to correct misaligned film. This traditional structure has two major drawbacks in practical production applications, severely restricting film winding quality and production stability. First, the correction transmission has poor reliability and is prone to slippage failure. Traditional correction rollers and CPP films use rigid contact friction transmission. Given the thin and smooth surface of the film, under high-speed production conditions, relative slippage easily occurs between the correction roller and the film contact surface during axial movement. This prevents the displacement of the correction roller from being effectively transmitted to the film, hindering accurate correction and failing to completely solve the film misalignment problem.

[0004] Secondly, the overall alignment is poor, easily causing film deformation and damage. Traditional equipment only adjusts the position of the alignment roller individually, while the flattening roller, tensioning roller, and other supporting rollers remain fixed. The relative position of the entire roller group cannot be synchronously adjusted with the film offset. When the film offsets slightly, the adjustment effect of a single alignment roller is weak, and the alignment accuracy is insufficient. When the film offset is large and a significant adjustment of the alignment roller is required, localized tensile and compressive stress concentration will occur between the fixed roller and the offset alignment roller, which can easily cause film wrinkles and tensile deformation. In severe cases, it can directly lead to film tearing and material breakage, not only reducing the yield of finished products but also wasting raw materials, causing production downtime, significantly increasing production costs, and reducing production efficiency.

[0005] In summary, existing single-axis correction roller type winding and correction devices have technical drawbacks such as slippage failure, poor correction effect, and easy damage to materials. They cannot meet the production requirements of high-precision and high-speed CPP cast film. Therefore, there is an urgent need to develop an automatic correction, leveling and winding device for CPP cast film that can simultaneously correct the axis, prevent slippage, and prevent material deformation and tearing. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides an automatic correction, leveling, and winding device for CPP cast film, which has the advantages of synchronous correction, anti-slip, and prevention of material deformation and tearing, thus solving the problems of the prior art.

[0007] An automatic alignment, leveling, and winding device for CPP cast film includes a frame on which axially movable flattening rollers, alignment rollers, and tension rollers are mounted. A detection roller and a winding roller are also mounted on the frame. The CPP cast film passes sequentially through the flattening roller, alignment roller, tension roller, and detection roller. The flattening roller, alignment roller, and tension roller are arranged in a triangular pattern. Each of the flattening roller, alignment roller, and tension roller has an annular groove. A telescopic mechanism is fixedly connected to the frame. The telescopic mechanism is signal-connected to the detection component of the detection roller. A mounting base is mounted at the end of the telescopic mechanism. An annular airbag is provided in the annular groove. Three actuating elements are mounted on the mounting base. Each actuating element extends into the annular groove and squeezes the annular airbag. The outer surface of the annular airbag extends to the outside of the annular groove.

[0008] In a preferred embodiment of the present invention, the flattening roller has a first annular groove, the straightening roller has a second annular groove, the tensioning roller has a third annular groove, the mounting base is connected to the first roller and the third roller by a spring sheet, and the mounting base is fixedly connected to the second roller, the edges of the first roller, the second roller and the third roller extend into the first annular groove, the second annular groove and the third annular groove, respectively.

[0009] In a preferred embodiment of the present invention, the telescopic mechanism includes an electric push rod, which is fixedly connected to a fixed rod. A collar is sleeved on the fixed rod, and the collar is fixedly connected to the fixed rod by a locking screw. The mounting base is fixedly connected to the collar.

[0010] As a preferred embodiment of the present invention, the detection roller is provided with a plurality of mounting grooves, and a laser detector is installed in the mounting grooves.

[0011] As a preferred embodiment of the present invention, a plurality of rollers are rotatably connected to the frame, and sleeves are fitted onto the rollers. The flattening roller, the straightening roller, and the tensioning roller are respectively fitted onto the corresponding rollers.

[0012] In a preferred embodiment of the present invention, the annular airbags are a first annular airbag, a second annular airbag, and a third annular airbag, and are respectively disposed in the first annular groove, the second annular groove, and the third annular groove.

[0013] As a preferred embodiment of the present invention, the flattening roller includes two symmetrically arranged first auxiliary airbags, the first auxiliary airbags being fixedly sleeved on the corresponding collars, and the first auxiliary airbags being connected to the first annular airbags.

[0014] As a preferred embodiment of the present invention, the correction roller has a cavity inside and a plurality of first through holes communicating with the cavity on its outer surface. The cavity is connected to the second annular groove. A second auxiliary airbag is installed in the first cavity. The outer surface of the second auxiliary airbag can extend to the outside through the first through holes. The second auxiliary airbag is connected to the second annular airbag.

[0015] The tensioning roller includes an inner roller body, a third auxiliary airbag, and an outer cylinder body. The third auxiliary airbag is fixedly connected to the inner roller body, and the outer cylinder body is fixedly sleeved on the third auxiliary airbag. The third auxiliary airbag and the third annular airbag are connected. The third auxiliary airbag is an elastic airbag.

[0016] As a preferred embodiment of the present invention, the mounting base is provided with a through hole, and an arc-shaped rod is fixedly connected to the frame, the arc-shaped rod being inserted into the through hole.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention is implemented as follows: The device incorporates annular airbags within the annular grooves of the flattening roller, the alignment roller, and the tensioning roller. A pressing mechanism causes the airbags to flexibly protrude and adhere to the film, replacing the traditional rigid contact structure. This significantly increases the contact friction between the rollers and the smooth CPP film, fundamentally preventing roller-film slippage and alignment failure during high-speed conveying and alignment. Simultaneously, an arc-shaped guide rod guides the airbag compression amount to adaptively adjust, further enhancing the anti-slip effect and ensuring that every alignment displacement action is precisely applied to the film, greatly improving alignment accuracy and stability.

[0018] 2. Abandoning the traditional structure of a single, independently adjustable correction roller, this design adopts a structure in which the flattening roller, correction roller, and tension roller are arranged in a triangle and move synchronously axially. The core functional rollers on the film conveying path are synchronously adapted to the offset state and adjusted in position, eliminating the limitations of correction caused by fixed front and rear rollers and single roller adjustment. Small offsets can be accurately corrected, and large offsets can be smoothly adapted, completely solving the problems of weak correction effect and incomplete offset correction in traditional equipment, and effectively ensuring the flatness of film winding.

[0019] 3. When the traditional single roller body is adjusted by a large margin, the film is prone to stress concentration between the fixed roller and the offset roller, causing wrinkles, tensile deformation and even tearing. The multi-roller synchronous linkage adjustment of the device can ensure uniform conveying tension and balanced stress of the film, without local extrusion and tensile stress; meanwhile, cooperating with the auxiliary airbags provided for each roller body, it realizes the cooperative operation of flexible flattening, elastic tensioning and precise deviation correction, forms all-round flexible protection for the film, thoroughly avoids defects such as material deformation, tearing and material breakage during the deviation correction and adjustment process, and significantly improves the finished product quality and yield of CPP cast films.

[0020] 4. The device can flexibly switch between main and auxiliary deviation correction roller bodies by rotating the mounting seat, adapting to different fault working conditions such as slight deviation and large deviation of the film. Meanwhile, relying on the characteristics of adaptive expansion and elastic tensioning of the airbag, it can adapt to the winding production requirements of CPP cast films with different thicknesses and specifications, which greatly improves the universality of the equipment and the adaptability to working conditions, and can meet the requirements of industrial high-speed, high-precision continuous production.

[0021] 5. The entire set of device can realize multi-roller synchronous adjustment and airbag friction increasing operation through a single telescopic mechanism, which has high structural integration and strong linkage. It does not require multiple sets of independent driving mechanisms, resulting in low energy consumption and low failure rate of the equipment; meanwhile, it effectively reduces raw material waste and production shutdown frequency, cuts down production operation and maintenance costs and material consumption costs, and significantly improves the economic benefits of enterprise production. Description of Drawings

[0022] Figure 1 is a schematic perspective structural view of the automatic deviation correction and flat winding device for CPP cast film provided by the embodiment of the present invention; Figure 2 is a schematic view provided by the embodiment of the present invention Figure 1 of the enlarged structure of part A in; Figure 3 is a schematic structural view of the deviation correction roller provided by the embodiment of the present invention; Figure 4 is a schematic front structural view of the automatic deviation correction and flat winding device for CPP cast film provided by the embodiment of the present invention; Figure 5 is a structural schematic view of the telescopic mechanism part provided by the embodiment of the present invention.

[0023] In the diagram: 1. Frame; 2. Flattening roller; 3. Correcting roller; 4. Tensioning roller; 41. Inner roller body; 42. Third auxiliary airbag; 43. Outer cylinder body; 5. Detection roller; 6. Telescopic mechanism; 61. Electric push rod; 62. Fixing rod; 63. Collar; 7. Mounting base; 8. First annular groove; 9. Second annular groove; 10. Third annular groove; 11. First roller; 12. Second roller; 13. Third roller; 14. Laser detector; 15. Roller shaft; 16. Sleeve; 17. First annular airbag; 18. Second annular airbag; 19. Third annular airbag; 20. Cavity; 21. First through hole; 22. Second auxiliary airbag; 23. Through hole; 24. Arc rod; 25. Take-up roller. Detailed Implementation

[0024] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0025] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] like Figures 1 to 5 As shown in the figure, an automatic correction, leveling and winding device for CPP cast film provided by an embodiment of the present invention includes a frame 1. A flattening roller 2, a correction roller 3, and a tension roller 4, all capable of axial movement, are mounted on the frame 1. A detection roller 5 is also mounted on the frame 1, and a winding roller 25 is mounted on the frame 1. The CPP cast film passes sequentially through the flattening roller 2, the correction roller 3, the tension roller 4, and the detection roller 5. The flattening roller 2, the correction roller 3, and the tension roller 4 are arranged in a triangular pattern. Each of the flattening roller 2, the correction roller 3, and the tension roller 4 has an annular groove. A telescopic mechanism 6 is fixedly connected to the frame 1. The telescopic mechanism 6 is signal-connected to the detection component of the detection roller 5. A mounting base 7 is mounted at the end of the telescopic mechanism 6. An annular airbag is provided in the annular groove. Three actuating elements are mounted on the mounting base 7. The actuating elements extend into the annular groove and squeeze the annular airbag. The outer surface of the annular airbag extends to the outside of the annular groove. In use, the detection component on the detection roller 5 detects the position of the material. When deviation is detected, the telescopic mechanism 6 is controlled to extend or retract, thereby causing the flattening roller 2, the correction roller 3, and the tensioning roller 4 to move simultaneously via the actuating component on the mounting base 7, thus achieving synchronous deviation correction. At the same time, because the actuating component squeezes the annular airbag, the outer surface of the annular airbag can be made to adhere to the material, increasing friction and preventing slippage.

[0027] Furthermore, the flattening roller 2 has a first annular groove 8, the correcting roller 3 has a second annular groove 9, and the tensioning roller 4 has a third annular groove 10. A first roller 11 and a third roller 13 are connected to the mounting base 7 via spring clips, and a second roller 12 is fixedly connected to the mounting base 7. The edges of the first roller 11, the second roller 12, and the third roller 13 extend into the first annular groove 8, the second annular groove 9, and the third annular groove 10, respectively. With this configuration, the correcting roller 3 is the primary adjustment target, while the flattening roller 2 and the tensioning roller 4 are secondary adjustment targets, fine-tuned only by moving the spring clips. This causes the tensioning roller 4 and the flattening roller 2 to move axially (in a relatively small size), thereby adapting to the correction. Specifically, the telescopic mechanism 6 includes an electric push rod 61, which is fixedly connected to a fixed rod 62. A collar 63 is sleeved on the fixed rod 62, and the collar 63 is fixedly connected to the fixed rod 62 by a locking screw. The mounting base 7 is fixedly connected to the collar 63. With this configuration, the mounting base 7 can be rotated to change its position. For example, the second roller 12 can be extended into the first annular groove 8, thereby causing the flattening roller 2 to move axially, while the first roller 11 and the third roller 13 simultaneously actuate the tension roller 4 and the correction roller 3. In this case, the flattening roller 2 is primarily adjusted, with the correction roller 3 and the tension roller 4 adjusted as auxiliary adjustments. Alternatively, the second roller 12 can be extended into the third annular groove 10, thereby primarily adjusting the tension roller 4.

[0028] Specifically, the detection roller 5 has several mounting slots, in which a laser detector 14 is installed. Several roller shafts 15 are rotatably connected to the frame 1, and sleeves 16 are fitted onto each roller shaft 15. The flattening roller 2, the straightening roller 3, and the tensioning roller 4 are respectively fitted onto their corresponding roller shafts 15. The annular airbags are a first annular airbag 17, a second annular airbag 18, and a third annular airbag 19, respectively, and are arranged in the first annular groove 8, the second annular groove 9, and the third annular groove 10.

[0029] Specifically, the flattening roller 2 includes two symmetrically arranged first auxiliary airbags, which are fixedly sleeved on the corresponding collars 63 and connected to the first annular airbag 17. The working principle of the flattening roller 2 is as follows: the material is flattened by contact and compression between the first auxiliary airbags and the first annular airbag 17. The material of the first auxiliary airbags is harder than that of the first annular airbag 17, so that it can achieve both expansion and compression effects.

[0030] Furthermore, the correction roller 3 has a cavity 20 inside, and its outer surface has several first through holes 21 communicating with the cavity 20. The cavity 20 is connected to the second annular groove 9. A second auxiliary airbag 22 is installed in the first cavity 20. The outer surface of the second auxiliary airbag 22 can extend to the outside through the first through holes 21. The second auxiliary airbag 22 is connected to the second annular airbag 18. The tensioning roller 4 includes an inner roller body 41, a third auxiliary airbag 42, and an outer cylinder body 43. The third auxiliary airbag 42 is fixedly connected to the inner roller body 41, and the outer cylinder body 43 is fixedly sleeved on the third auxiliary airbag 42. The third auxiliary airbag 42 is connected to the third annular airbag 19. The third auxiliary airbag 42 is an elastic airbag. With this configuration, the elastic airbag can be used for elastic tensioning. The tensioning force comes from the elastic force of the elastic airbag. The mounting base 7 has a through hole 23, and an arc-shaped rod 24 is fixedly connected to the frame 1, the arc-shaped rod 24 being inserted into the through hole 23. Under normal conditions, the through hole is located in the middle of the arc-shaped rod 24. When the mounting base 7 moves forward or backward, due to the guidance of the arc-shaped rod 24, the mounting base 7 not only moves forward or backward but also rotates slightly. Under this rotation, the first roller 11 will press downward against the annular airbag, causing its surface to protrude more, preventing slippage. Simultaneously, some gas from the annular airbag can be squeezed into the auxiliary airbag, thereby increasing friction.

[0031] Working principle of the invention: This CPP cast film automatic correction, leveling, and winding device relies on a core structure of synchronous roller adjustment and airbag self-adaptive friction enhancement, combined with an automatic detection and electronic control linkage system, to achieve real-time detection, precise correction, and leveling and winding of CPP cast film deviation. The overall workflow and core operating principle are as follows: During operation, the CPP cast film passes sequentially through a triangular arrangement of flattening roller 2, straightening roller 3, tensioning roller 4, and detection roller 5 along a preset conveying path, ultimately completing the winding operation. During production, a laser detector 14 on the detection roller 5 collects real-time data on the film's lateral position, continuously monitors for film misalignment, and transmits the detection signal to the equipment control system in real time.

[0032] When the detection component detects lateral skewness, misalignment, or other offset issues in the CPP cast film, the control system automatically triggers the telescopic mechanism 6 (electric push rod 61) to initiate telescopic movement, causing the mounting base 7, fixed on the collar 63, to undergo axial displacement. During the movement of the mounting base 7, the three actuating elements arranged on it extend into the annular grooves of the flattening roller 2, the correcting roller 3, and the tensioning roller 4, respectively, synchronously pushing the three sets of rollers to undergo slight axial displacement. This achieves synchronous linkage correction of the flattening roller 2, the correcting roller 3, and the tensioning roller 4, ensuring that the relative positions of the three core working rollers always adapt to the film offset state. This completely solves the problems of lagging correction and weak effect caused by traditional single-roller correction and fixed front and rear rollers.

[0033] While the roller assembly is synchronously correcting its alignment, the mounting base 7 continuously squeezes the annular airbags inside the annular grooves of each roller via a toggle mechanism during its displacement. This causes a portion of the annular airbag structure to protrude from the outside of the annular groove, tightly adhering to the contact surface of the CPP cast film. By replacing the traditional rigid roller contact with flexible airbag bonding, the contact friction between the roller and the film is significantly increased, eliminating slippage between the roller and the film during high-speed production. This ensures that the roller displacement is accurately transmitted to the film, guaranteeing the effective implementation of the alignment command.

[0034] Meanwhile, the arc-shaped rod 24 fixed on the frame 1 and the through hole 23 of the mounting base 7 form a guiding fit. Under normal conditions, the through hole 23 of the mounting base 7 is located in the middle of the arc-shaped rod 24, ensuring stable operation of the equipment. When the mounting base 7 moves back and forth with the telescopic mechanism 6 to correct the deviation, under the guiding and limiting action of the arc-shaped rod 24, the mounting base 7 will rotate slightly, further enhancing the squeezing effect of the actuating component on the annular airbag, increasing the protrusion of the airbag and making the fit tighter, further improving the anti-slip performance. At the same time, during the extrusion process, the gas inside the annular airbag can be partially squeezed into the auxiliary airbags corresponding to each roller. Through the adaptive expansion, squeezing and tensioning action of the auxiliary airbags, the film flattening of the flattening roller 2, the precise correction of the deviation roller 3, and the elastic constant force tensioning of the tensioning roller 4 are achieved respectively. Multiple combinations achieve a flat and deviation correction operation without film deformation or tearing.

[0035] In addition, the equipment can flexibly adjust the working mode according to the film offset condition. By rotating the collar 63 and the mounting base 7, the main and auxiliary adjustment rollers can be switched. It can realize the conventional correction mode with the correction roller 3 as the main roller and the flattening roller 2 and tensioning roller 4 as the auxiliary rollers, or it can be switched to the flat correction mode with the flattening roller 2 as the main roller and the other rollers as the auxiliary rollers, so as to adapt to the production correction needs of CPP cast film with different offset degrees and different specifications.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic correction, leveling, and winding device for CPP cast film, comprising a frame (1), wherein a flattening roller (2), a correction roller (3), and a tensioning roller (4) capable of axial movement are mounted on the frame (1), a detection roller (5) is mounted on the frame (1), and a winding roller (25) is mounted on the frame (1), wherein the CPP cast film sequentially passes through the flattening roller (2), the correction roller (3), the tensioning roller (4), and the detection roller (5), characterized in that: The flattening roller (2), the straightening roller (3), and the tensioning roller (4) are arranged in a triangle. The flattening roller (2), the straightening roller (3), and the tensioning roller (4) are all provided with annular grooves. A telescopic mechanism (6) is fixedly connected to the frame (1). The telescopic mechanism (6) and the detection component of the detection roller (5) are connected by a signal. A mounting seat (7) is installed at the end of the telescopic mechanism (6). An annular airbag is provided in the annular groove. Three actuating elements are installed on the mounting seat (7). The actuating elements extend into the annular groove and squeeze the annular airbag. The outer surface of the annular airbag extends to the outside of the annular groove.

2. The automatic correction, leveling, and winding device for CPP cast film as described in claim 1, characterized in that: The flattening roller (2) is provided with a first annular groove (8), the straightening roller (3) is provided with a second annular groove (9), the tensioning roller (4) is provided with a third annular groove (10), the mounting base (7) is connected to a first roller (11) and a third roller (13) by a spring sheet, and a second roller (12) is fixedly connected to the mounting base (7). The edges of the first roller (11), the second roller (12) and the third roller (13) extend into the first annular groove (8), the second annular groove (9) and the third annular groove (10) respectively.

3. The automatic correction, leveling, and winding device for CPP cast film as described in claim 2, characterized in that: The telescopic mechanism (6) includes an electric push rod (61), which is fixedly connected to a fixed rod (62). A collar (63) is sleeved on the fixed rod (62), and the collar (63) is fixedly connected to the fixed rod (62) by a locking screw. The mounting base (7) is fixedly connected to the collar (63).

4. The automatic correction, leveling, and winding device for CPP cast film as described in claim 1, characterized in that: The detection roller (5) has several mounting slots, and a laser detector (14) is installed in the mounting slots.

5. The automatic correction, leveling, and winding device for CPP cast film as described in claim 3, characterized in that: A number of rollers (15) are rotatably connected to the frame (1), and sleeves (16) are sleeved on the rollers (15). The flattening roller (2), the correction roller (3) and the tensioning roller (4) are respectively sleeved on the corresponding rollers (15).

6. The automatic correction, leveling, and winding device for CPP cast film as described in claim 5, characterized in that: The annular airbags are a first annular airbag (17), a second annular airbag (18), and a third annular airbag (19), and are respectively arranged in the first annular groove (8), the second annular groove (9), and the third annular groove (10).

7. The automatic correction, leveling, and winding device for CPP cast film as described in claim 6, characterized in that: The flattening roller (2) includes two symmetrically arranged first auxiliary airbags, which are fixedly sleeved on the corresponding collar (63) and connected to the first annular airbag (17).

8. The automatic correction, leveling, and winding device for CPP cast film as described in claim 7, characterized in that: The correction roller (3) has a cavity (20) inside and a plurality of first through holes (21) communicating with the cavity (20) on its outer surface. The cavity (20) is connected to the second annular groove (9). A second auxiliary airbag (22) is installed in the first cavity (20). The outer surface of the second auxiliary airbag (22) can extend to the outside through the first through holes (21). The second auxiliary airbag (22) is connected to the second annular airbag (18).

9. The automatic correction, leveling, and winding device for CPP cast film as described in claim 8, characterized in that: The tensioning roller (4) includes an inner roller body (41), a third auxiliary airbag (42) and an outer cylinder body (43). The third auxiliary airbag (42) is fixedly connected to the inner roller body (41), and the outer cylinder body (43) is fixedly sleeved on the third auxiliary airbag (42). The third auxiliary airbag (42) and the third annular airbag (19) are connected. The third auxiliary airbag (42) is an elastic airbag.

10. The automatic correction, leveling, and winding device for CPP cast film as described in claim 9, characterized in that: The mounting base (7) is provided with a through hole (23), and an arc rod (24) is fixedly connected to the frame (1), and the arc rod (24) is inserted into the through hole (23).

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