A surface flattening and wrinkle removing device for CPP film production and processing and a production method thereof

Abstract

The application provides a surface flattening and wrinkle removing equipment for CPP film production and processing and a production method thereof, and relates to the technical field of CPP film production. The equipment comprises a precise setting and overload protection device for pressing force of the film. A conveying mechanism realizes stable conveying and tensioning of the film through cooperation of a double-sided roller, a compression roller, a cylinder, a compression roller, a transmission roller, a motor and a belt. A pressure regulating mechanism is movably connected with the conveying mechanism through engagement of a synchronous wheel and a synchronous belt. The equipment can accurately set the pressing torque through step-by-step adjustment of a coarse adjustment spring and a fine adjustment spring according to different film characteristics, and realizes overload protection through slipping of a friction block when the pressure exceeds the limit, thereby effectively avoiding damage of the film caused by excessive pressure.

Description

Technical Field

[0001] This invention relates to the field of CPP film production technology, and more specifically, to a surface flattening and wrinkle removal device and its production method for CPP film production and processing. Background Technology

[0002] In existing technologies, surface flattening and wrinkle removal equipment for CPP film production and processing typically uses fixed raised rollers to forcibly press the taut film to eliminate wrinkles. The raised height and pressing depth of this rigid pressing roller are fixed and cannot be adjusted in real time according to the actual thickness of the film, the hardness of the material, and the running speed. As a result, when the film becomes thinner due to process fluctuations or the material is too soft, excessive pressing force can cause irreversible indentations or even tears on the film surface, which seriously affects the product quality and production qualification rate of the film.

[0003] The aforementioned technical defects have further led to problems of narrow equipment applicability and high operational difficulty in actual production. Due to the lack of an effective pressure regulation mechanism, operators can only rely on experience to select conservative process parameters to avoid damaging the film. This not only sacrifices production efficiency but also makes it difficult to guarantee the stability of the wrinkle removal effect. At the same time, when dealing with films of different specifications, it is often necessary to stop the machine to replace rollers with different protrusion heights. Frequent equipment adjustments significantly increase production preparation time and labor intensity, thereby restricting the continuous operation capability and product quality consistency of the CPP film production line. Summary of the Invention

[0004] (a) Technical problems to be solved To address the problems existing in the prior art, the present invention provides a surface flattening and wrinkle removal device and its production method for CPP film production and processing, so as to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a surface flattening and wrinkle removal device for CPP film production and processing, comprising a fixedly arranged frame; and further comprising a pressure regulating mechanism and a conveying mechanism; The pressure regulating mechanism includes an internal rod rotatably connected to the frame. An inner sleeve is coaxially fitted to the outer wall of the internal rod. A middle tube is symmetrically arranged on both sides of the inner sleeve. Each middle tube has a threaded sleeve on both sides. The threaded sleeves near the two ends of the middle tube are fixedly connected. Two telescopic sleeves are slidably arranged at the two ends of the middle tube. Two sets of coarse and fine adjusting springs with different stiffness coefficients are equally spaced on each telescopic sleeve. The conveying mechanism includes multiple double-sided rollers that are rotatably arranged, and a film body is attached between the multiple double-sided rollers.

[0006] Preferably, the pressure regulating mechanism further includes multiple sets of staggered grooves formed on the inner wall of the intermediate tube, each set of staggered grooves having a push plate slidably disposed therein, and the multiple push plates are divided into two groups, one group of push plates being connected to multiple coarse adjusting springs, and the other group of push plates being connected to multiple fine adjusting springs.

[0007] Preferably, each of the threaded sleeves is threaded with a hand-adjusting wheel, and each hand-adjusting wheel is fitted with a thrust bearing on the side near the intermediate tube, and the two thrust bearings are respectively fitted onto the two telescopic sleeves.

[0008] Preferably, a hexagonal sleeve is provided at the middle position of each of the hand adjustment wheels, and a fixing wheel is provided at the middle position of the outer wall of the intermediate tube.

[0009] Preferably, each of the push plates is provided with a double inclined block, and the lower end of the double inclined block is slidably connected to a friction block. The multiple friction blocks are in two groups, and the two groups of friction blocks abut against the two sides of the intermediate tube, and the multiple friction blocks press against the outer wall of the inner rod.

[0010] Preferably, multiple sets of deformation springs are evenly spaced on the outer wall of the inner sleeve, and the other end of the multiple sets of deformation springs is connected to a convex roller, and the convex roller abuts against the film body. A synchronous wheel is provided on the inner rod, and a synchronous wheel is also provided on the double-sided roller. The two synchronous wheels mesh with each other, and the two double-sided rollers are connected by a synchronous belt.

[0011] Preferably, the conveying mechanism further includes two sets of pressure rollers respectively arranged on the frame, and the two sets of pressure rollers respectively clamp the film body.

[0012] Preferably, the frame is provided with two cylinders, and the extended ends of the cylinders are connected to the pressure rollers, and the pressure rollers press on the film body. A drive roller is rotatably provided on the frame, and the film body is attached to the drive rollers.

[0013] Preferably, a motor is fixedly mounted on the frame, and a belt is connected to the extended end of the motor, the belt engaging with the transmission roller.

[0014] This invention provides a surface flattening and wrinkle removal method for CPP film production and processing, comprising the following steps: The first stage is the parameter setting and pressure adjustment stage. According to the material, thickness and process requirements of the film to be processed, the operator compresses the coarse or fine adjustment spring by rotating the hand adjustment wheel. The spring force generated by the spring is transmitted to the friction block through the push plate and double inclined block. The maximum static friction torque threshold is precisely set between the inner rod and the inner sleeve, and the two-level setting of coarse and fine adjustment of the pressing pressure is completed. The second stage is the film conveying and periodic pressing stage. The motor drives the transmission roller to move the film at a uniform speed. The double-sided rollers rotate with the film and drive the internal rod to rotate in the opposite direction through the synchronous belt and synchronous wheel. Within the range of frictional torque, the internal rod drives the convex roller to rotate synchronously. The convex part of the convex roller periodically presses against the film surface. The flexible transmission of the deformation spring applies local pressing to the wrinkled position to complete the flattening. The third stage is the overload protection and continuous operation stage. When the pressing pressure exceeds the preset threshold due to changes in the film body, slippage occurs between the friction block and the internal rod. The rotation of the internal rod stops driving the convex roller to rotate, thereby avoiding excessive pressure from damaging the film. After the pressure returns to normal, the friction block re-establishes static friction connection, and the convex roller resumes synchronous rotation to continue pressing and wrinkle removal.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a surface flattening and wrinkle removal device and its production method for CPP film production and processing, which has the following beneficial effects: This invention achieves precise setting and fine-tuning of film pressing pressure over a wide range through an innovative two-stage pressure adjustment structure. The pressure adjustment mechanism features two sets of coarse and fine springs with different stiffness coefficients on the same telescopic sleeve. The operator can independently compress the two sets of springs by rotating the hand adjustment wheel. The high stiffness of the coarse spring is suitable for rapid coarse adjustment and range setting of the pressing pressure, while the low stiffness of the fine spring allows for fine-tuning based on the coarse adjustment. The combination of these two features enables the device to accurately adapt to the differentiated pressing pressure requirements of films of different thicknesses and materials, effectively avoiding problems such as poor wrinkle removal or film damage caused by improper pressure settings.

[0016] The friction block overload protection mechanism constructed in this invention automatically slips and cuts off power transmission when the pressing pressure exceeds a preset threshold. This solves the problem of traditional rigid pressing devices that are prone to overpressure damage to the film due to the inability to adjust the pressure. When the pressing pressure of the convex roller on the film exceeds the elastic force value set by the coarse and fine adjusting springs, the static friction between the friction block and the internal rod is overcome and relative sliding occurs. The rotation of the internal rod no longer drives the convex roller to rotate, thereby avoiding excessive pressure acting on the film surface. After the pressure returns to normal, the friction block re-establishes the static friction connection and resumes synchronous rotation. This automatic overload protection does not require external sensors or control intervention, has a rapid response and high reliability, and provides a reliable safety guarantee for the continuous production of films.

[0017] The force transmission design of the double inclined blocks and push plate in this invention achieves efficient conversion of spring pressure into friction block positive pressure and uniform application through multiple contact points. When the push plate slides in the staggered groove, the vertical spring thrust is converted into horizontal expansion force through the inclined surfaces of the double inclined blocks, so that multiple friction blocks are uniformly pressed against the outer wall of the inner rod with the same pressure. This symmetrical multi-contact pressing method not only provides a stable and reliable maximum static friction torque, but also avoids excessive local wear due to the uniform distribution of contact points, significantly extending the service life of the friction pair. At the same time, the operator can change the positive pressure of the friction blocks by compressing the spring through the hand adjustment wheel. The adjustment method is intuitive and simple and can be performed during equipment operation.

[0018] This invention achieves motion coordination and phase matching between the pressure regulating mechanism and the conveying mechanism through the transmission design of synchronous pulleys and synchronous belts. The synchronous pulleys on the internal rod mesh with the synchronous pulleys on the double-sided rollers, and the connection of the synchronous belt ensures that the rotation of the convex roller and the film conveying speed are precisely synchronized. This ensures that the raised part of the convex roller can periodically press against the film surface with a fixed phase relationship, avoiding the problem of pressing position deviation or repeated pressing of the same position due to speed asynchrony. At the same time, the connection between the double-sided rollers through the synchronous belt ensures the consistency of the conveying speed on both sides of the film, providing a reliable mechanical basis for uniform and stable wrinkle removal operation.

[0019] This invention achieves precise pressure control while fully considering ease of operation and intuitive adjustment. The hexagonal sleeve on the hand adjustment wheel cooperates with the fixed wheel on the outer wall of the intermediate tube, allowing the operator to easily adjust the pressure using two wrenches without disassembling any parts. The graded design of the coarse and fine adjustment springs enables the operator to quickly find the optimal pressure range before making fine adjustments, significantly shortening the equipment adjustment time during process changes. At the same time, the flexible transmission of the deformable spring ensures that the pressing of the convex roller on the film always has a buffering characteristic, further reducing the risk of impact damage to the film. This provides a highly efficient, safe, and easy-to-operate flattening and wrinkle removal solution for CPP film production lines. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a surface flattening and wrinkle removal device for CPP film production and processing according to the present invention; Figure 2 In this invention Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram of the convex roller and the hand-adjusting wheel in this invention; Figure 4 This is a schematic diagram of the structure of the intermediate tube in this invention; Figure 5 This is a cross-sectional view of the threaded sleeve and double-bend block in this invention. Figure 6This is a cross-sectional view of the intermediate tube in this invention. Figure 7 This is a schematic diagram of the push plate in this invention; Figure 8 This is a cross-sectional view of the double-sloping block in this invention; Figure 9 This is a schematic diagram of the coarse and fine adjusting springs in this invention; Figure 10 This is a production process flow diagram for this invention.

[0021] In the diagram: 11. Frame; 21. Pressure regulating mechanism; 22. Internal rod; 23. Internal sleeve; 24. Intermediate tube; 25. Threaded sleeve; 26. Telescopic sleeve; 27. Coarse adjustment spring; 28. Fine adjustment spring; 29. ​​Interlaced groove; 31. Conveying mechanism; 32. Double-sided roller; 33. Film body; 34. Pressure roller; 35. Cylinder; 36. Pressure roller; 37. Drive roller; 38. Motor; 39. Belt; 210. Push plate; 211. Hand adjustment wheel; 212. Thrust bearing; 213. Hexagonal sleeve; 214. Fixed wheel; 215. Double inclined block; 216. Friction block; 217. Deformation spring; 218. Convex roller; 219. Synchronous pulley; 220. Synchronous belt. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0025] Please see Figures 1 to 9 This embodiment provides a surface flattening and wrinkle removal device for CPP film production and processing. This device aims to solve the technical problem that existing flattening and wrinkle removal devices cannot adjust the pressing pressure due to the use of rigid raised rollers, which leads to the film being easily damaged by excessive pressure. By integrating a pressure regulating mechanism with two-level pressure setting functions of coarse and fine adjustment and a conveying mechanism for stable film conveying, it realizes precise control and flexible transmission of film pressing pressure, effectively avoiding the impact of excessive pressure on film quality.

[0026] 1. Overall structure and initial state The surface flattening and wrinkle removal equipment for CPP film production and processing includes a frame 11 as the mounting base, and a pressure regulating mechanism 21 and a conveying mechanism 31 mounted on the frame 11. The pressure regulating mechanism 21 is used to apply adjustable periodic pressure to the film during conveying to eliminate wrinkles, and the conveying mechanism 31 is used to drive the film to move smoothly and provide the necessary tension and support in the pressing area.

[0027] 2. Composition of the core system 2.1 Pressure regulating mechanism 21 The pressure regulating mechanism 21 is the core unit for achieving precise adjustment and flexible transmission of pressure. It includes an internal rod 22 rotatably connected to the frame 11. An internal sleeve 23 is coaxially fitted to the outer wall of the internal rod 22. Intermediate tubes 24 are symmetrically arranged on both sides of the internal sleeve 23, and threaded sleeves 25 are threadedly connected to both sides of each intermediate tube 24. The two threaded sleeves 25 located at both ends of the same intermediate tube 24 are fixedly connected to each other. Two telescopic sleeves 26 are slidably and limit the movement at both ends of each intermediate tube 24. Each telescopic sleeve 26 has two sets of coarse adjustment springs 27 and fine adjustment springs 28 with different stiffness coefficients arranged at equal intervals along the axial direction. Multiple sets of staggered grooves 29 are formed circumferentially on the inner wall of the intermediate tube 24. A push plate 210 is slidably arranged in each staggered groove 29, and the push plates 210 are divided into two groups. One group of push plates 210 is connected to the ends of the multiple coarse adjustment springs 27, and the other group of push plates 210 is connected to the ends of the multiple fine adjustment springs 28. Each threaded sleeve 25 is threadedly connected to a hand-adjusting wheel 211, and the hand-adjusting wheel 211 is positioned close to... A thrust bearing 212 is fitted to one side of the intermediate tube 24. Two thrust bearings 212 are respectively fitted to the end face of the corresponding telescopic sleeve 26. A hexagonal sleeve 213 for operation is provided in the middle position of each hand adjustment wheel 211. A fixed wheel 214 is fixedly installed in the middle position of the outer wall of the intermediate tube 24. A double inclined block 215 is fixedly installed on each push plate 210, and a friction block 216 is slidably connected to the lower end of the double inclined block 215. The multiple friction blocks 216 are also divided into two groups, and the two groups of friction blocks 216 are respectively The lower ends of all friction blocks 216 are pressed against the inner walls of the middle tube 24 and pressed against the outer wall of the inner rod 22. Multiple sets of deformation springs 217 are evenly spaced along the circumference on the outer wall of the inner sleeve 23, and the other end of the multiple sets of deformation springs 217 is connected to a convex roller 218 for pressing the film. A synchronous wheel 219 is fixedly installed on the inner rod 22, and a synchronous wheel 219 is also fixedly installed on the double side rollers 32, and the two synchronous wheels 219 mesh with each other. The two double side rollers 32 are connected by a synchronous belt 220.

[0028] 2.2 Conveying Mechanism 31 The conveying mechanism 31 is the core unit that drives the stable conveying of the film and provides the basic conditions for pressing. It includes multiple double-sided rollers 32 rotatably mounted on the frame 11, and the film body 33 to be processed is wrapped around the multiple double-sided rollers 32. Two sets of pressing rollers 34 are also respectively mounted on the frame 11, and the two sets of pressing rollers 34 clamp the film body 33 from the upper and lower sides respectively. Two cylinders 35 are fixedly mounted on the frame 11, and the extended ends of the cylinders 35 are connected to pressure rollers 36. The pressure rollers 36 can press down and adhere to the surface of the film body 33. A transmission roller 37 for driving the film movement is rotatably mounted on the frame 11, and the film body 33 adheres to the surface of the transmission roller 37. A motor 38 is fixedly mounted on the frame 11, and the extended end of the motor 38 is connected to the transmission roller 37 through a belt 39.

[0029] 3. Working process and principle of the device The working process and principle of the surface flattening and wrinkle removal equipment for CPP film production and processing are as follows: Before starting the operation, the maximum transmission torque of the pressure adjustment mechanism 21 is first set according to the material, thickness and process requirements of the film to be processed. The operator uses two wrenches to respectively clamp the fixed wheel 214 and the hexagonal sleeve 213 to fix the intermediate tube 24 and rotate the hand adjustment wheel 211. The rotation of the hand adjustment wheel 211 drives its axial movement through the thread, and then pushes the telescopic sleeve 26 to slide along the intermediate tube 24 through the thrust bearing 212. The movement of the telescopic sleeve 26 compresses the coarse adjustment spring 27 or the fine adjustment spring 28 connected to it. The compression of the coarse adjustment spring 27 can be used to initially set the pressing pressure within a large range. The compression of the fine adjustment spring 28 can be used to make fine adjustments on the basis of coarse adjustment. The difference in the stiffness coefficient of the two sets of springs makes the adjustment range wide and the accuracy high.

[0030] When the telescopic sleeve 26 compresses the spring, the elastic force generated by the spring is transmitted to the push plate 210 connected to it. The push plate 210 converts the vertical elastic force into a horizontal thrust through the double inclined block 215, which acts on the friction block 216, so that the friction block 216 presses against the outer wall of the inner rod 22 with corresponding pressure, thereby establishing a maximum static friction torque threshold that can be precisely set between the inner rod 22 and the inner sleeve 23.

[0031] After the settings are completed, the motor 38 is started. The motor 38 drives the transmission roller 37 to rotate via the belt 39. The transmission roller 37 drives the film body 33 to be conveyed forward. At the same time, the cylinder 35 pushes the pressure roller 36 down to keep the film taut. The movement of the film drives multiple double-sided rollers 32 to rotate. The rotation of the double-sided rollers 32 is transmitted to the double-sided rollers 32 on the other side through the synchronous belt 220 to achieve synchronous operation. At the same time, the synchronous wheel 219 on the double-sided rollers 32 meshes with the synchronous wheel 219 on the internal rod 22. Since the double-sided rollers 32 and the internal rod 22 are located on the inner and outer sides of the film respectively, their rotation directions are opposite to ensure the coordination of relative movement.

[0032] Under normal operating conditions, the rotation of the inner rod 22 drives the inner sleeve 23 and the convex roller 218 to rotate synchronously through the static friction between the friction block 216 and the inner rod 22. Since the outer circle of the convex roller 218 has a periodic protrusion structure, it will periodically press the protrusions against the surface of the film body 33 during rotation. When the convex roller 218 presses against the film, the deformation spring 217 is compressed and deformed, and the pressing force is flexibly transmitted to the film surface, applying local pressing to the wrinkles that may exist on the film to flatten them. Since the two ends of the film are clamped and fixed by the pressure roller 34, the pressing area forms an effective tensile stress, which helps to eliminate wrinkles.

[0033] When the pressing pressure exceeds the preset friction torque threshold due to local thickening or hardness changes of the film, slippage occurs between the friction block 216 and the inner rod 22. The rotation of the inner rod 22 no longer drives the inner sleeve 23 and the convex roller 218 to rotate, thereby avoiding excessive pressure on the film and causing damage. After slippage occurs, as the pressure returns to normal, the friction block 216 re-establishes static friction connection, and the convex roller 218 resumes synchronous rotation to continue pressing and wrinkle removal. This overload protection mechanism ensures that the pressing pressure is always limited within a safe range.

[0034] Working principle summary: This invention achieves precise setting of pressing torque and overload protection through the graded adjustment of coarse adjusting spring 27 and fine adjusting spring 28 in the pressure regulating mechanism 21 and the force transmission design of double inclined block 215 and friction block 216. The coordinated work of double side roller 32, pressing roller 34 and transmission roller 37 in the conveying mechanism 31 ensures stable film conveying and pressing conditions. The combination of the two enables the equipment to flexibly adjust the wrinkle removal pressure according to different film characteristics, effectively avoiding film damage caused by excessive pressure.

[0035] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although 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 can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A surface flattening and wrinkle removal device for CPP film production and processing, comprising a fixedly installed frame (11); characterized in that: It also includes a pressure regulating mechanism (21) and a conveying mechanism (31); The pressure regulating mechanism (21) includes an internal rod (22) rotatably connected to the frame (11). An internal sleeve (23) is coaxially fitted to the outer wall of the internal rod (22). A middle tube (24) is symmetrically arranged on both sides of the internal sleeve (23). Each middle tube (24) has a threaded sleeve (25) on both sides. The threaded sleeves (25) near the two ends of the middle tube (24) are fixedly connected. Two telescopic sleeves (26) are slidably arranged at both ends of the middle tube (24). Two sets of coarse adjustment springs (27) and fine adjustment springs (28) with different stiffness coefficients are equally spaced on each telescopic sleeve (26). The conveying mechanism (31) includes a plurality of double-sided rollers (32) rotatably arranged, and a film body (33) is attached between the plurality of double-sided rollers (32).

2. The surface flattening and wrinkle removal equipment for CPP film production and processing according to claim 1, characterized in that: The pressure regulating mechanism (21) also includes multiple sets of interlaced grooves (29) opened on the inner wall of the intermediate tube (24). Each interlaced groove (29) is slidably provided with a push plate (210), and the multiple push plates (210) are divided into two groups. One group of push plates (210) is connected to multiple coarse adjustment springs (27), and the other group of push plates (210) is connected to multiple fine adjustment springs (28).

3. The surface flattening and wrinkle removal equipment for CPP film production and processing according to claim 2, characterized in that: Each of the threaded sleeves (25) is threaded with a hand adjustment wheel (211), and each of the hand adjustment wheels (211) is fitted with a thrust bearing (212) on the side near the middle tube (24), and the two thrust bearings (212) are respectively fitted on the two telescopic sleeves (26).

4. The surface flattening and wrinkle removal equipment for CPP film production and processing according to claim 3, characterized in that: Each of the hand adjustment wheels (211) is provided with a hexagonal sleeve (213) at the middle position, and a fixed wheel (214) is provided at the middle position of the outer wall of the intermediate tube (24).

5. The surface flattening and wrinkle removal equipment for CPP film production and processing according to claim 4, characterized in that: Each of the push plates (210) is provided with a double inclined block (215), and the lower end of the double inclined block (215) is slidably connected to a friction block (216). The multiple friction blocks (216) are in two groups, and the two groups of friction blocks (216) abut against the two sides of the middle tube (24), and the multiple friction blocks (216) press against the outer wall of the inner rod (22).

6. The surface flattening and wrinkle removal equipment for CPP film production and processing according to claim 5, characterized in that: Multiple sets of deformation springs (217) are evenly spaced on the outer wall of the inner sleeve (23), and the other end of the multiple sets of deformation springs (217) is connected to a convex roller (218). The convex roller (218) abuts against the film body (33). A synchronous wheel (219) is provided on the inner rod (22), and a synchronous wheel (219) is also provided on the double-sided roller (32). The two synchronous wheels (219) mesh with each other, and the two double-sided rollers (32) are connected by a synchronous belt (220).

7. The surface flattening and wrinkle removal equipment for CPP film production and processing according to claim 6, characterized in that: The conveying mechanism (31) also includes two sets of pressure rollers (34) respectively arranged on the frame (11), and the two sets of pressure rollers (34) respectively clamp the film body (33).

8. The surface flattening and wrinkle removal equipment for CPP film production and processing according to claim 7, characterized in that: Two cylinders (35) are provided on the frame (11), and the extended end of the cylinder (35) is connected to the pressure roller (36). The pressure roller (36) presses on the film body (33). A transmission roller (37) is rotatably provided on the frame (11), and the film body (33) is attached to the transmission roller (37).

9. The surface flattening and wrinkle removal equipment for CPP film production and processing according to claim 8, characterized in that: A motor (38) is fixedly mounted on the frame (11), and a belt (39) is connected to the extended end of the motor (38). The belt (39) meshes with the transmission roller (37).

10. A surface flattening and wrinkle removal production method for CPP film manufacturing, employing the surface flattening and wrinkle removal equipment for CPP film manufacturing as described in claim 9, characterized in that: Includes the following steps: The first stage is the parameter setting and pressure adjustment stage. According to the material, thickness and process requirements of the film to be processed, the operator compresses the coarse adjustment spring (27) or fine adjustment spring (28) by rotating the hand adjustment wheel (211). The spring force generated by the spring is transmitted to the friction block (216) through the push plate (210) and the double inclined block (215). The maximum static friction torque threshold is precisely set between the inner rod (22) and the inner sleeve (23), and the coarse and fine adjustment of the pressing pressure are completed. The second stage is the film conveying and periodic pressing stage. The motor (38) drives the transmission roller (37) to move the film at a uniform speed. The double-sided roller (32) rotates with the film and drives the internal rod (22) to rotate in the opposite direction through the synchronous belt (220) and the synchronous wheel (219). Within the range of frictional torque, the internal rod (22) drives the convex roller (218) to rotate synchronously. The convex part of the convex roller (218) periodically presses against the film surface. The flexible transmission of the deformation spring (217) applies local pressure to the wrinkled position to complete the flattening. The third stage is the overload protection and continuous operation stage. When the pressure exceeds the preset threshold due to the change of the film body (33), the friction block (216) and the internal rod (22) slip. The rotation of the internal rod (22) stops driving the convex roller (218) to rotate, thereby avoiding excessive pressure damage to the film. After the pressure returns to normal, the friction block (216) re-establishes static friction connection, and the convex roller (218) resumes synchronous rotation to continue pressing and wrinkle removal.

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