Film winding device and winding method for polyimide film production

Abstract

The present invention belongs to the technical field of winding equipment, and specifically relates to a film winding equipment and a winding method for polyimide film production, including a bottom shell, a winding mechanism; a pretreatment mechanism, the pretreatment mechanism is arranged on one side of the bottom shell; a linkage mechanism, the linkage mechanism is arranged inside the bottom shell; a tensioning mechanism, the tensioning mechanism is arranged between the winding mechanism and the pretreatment mechanism; a pressing mechanism, the pressing mechanism is arranged above the winding mechanism; wherein the pretreatment mechanism includes a support part, the support part is connected to one side of the bottom shell, the support part is connected to a hollow roller that is distributed in an array on the support part, and the support part is also provided with an electrostatic elimination component that is distributed in an array, and an air intake part is connected between the plurality of hollow rollers, and an air delivery part is arranged in the bottom shell, and a reciprocating part is arranged at one end of the air delivery part. The present invention effectively eliminates static electricity, removes floating dust, and automatically adjusts the pressing force to achieve high-quality and stable winding of the film.

Description

Technical Field

[0001] The invention belongs to the technical field of winding equipment, and in particular relates to a film winding equipment and a winding method for producing polyimide films. Background Art

[0002] Polyimide film is a high-temperature resistant electrical insulation material for motors and electrical appliances. Its English name (polyimide film; PIfilm) includes two types: homophenyl polyimide film and biphenyl polyimide film.

[0003] With the advancement of science and technology, polyimide film is widely used in electronics, aviation and other fields due to its excellent performance. However, in the film production process, film winding is crucial; the film often affects the winding effect due to the failure to maintain appropriate tension during the winding process; in addition, if the winding process is deflected, it will also affect the aesthetics of the winding. In order to improve the winding effect in the prior art, a tensioning and guiding structure is generally set on the winding device, such as a winding device for producing plastic film in Chinese patent application CN116873612A. In order to keep the plastic film in an appropriate tension during the winding process to facilitate the winding work, the position of the bearing seat is adjusted along the guide groove so that the tension roller can properly tension the plastic film.

[0004] For example, the winding equipment in the above-mentioned comparative case is equipped with tensioning and guiding structures to improve the winding effect. However, there are still many problems in actual use: First, static electricity is easily generated during the manufacturing process of the film due to friction with the rollers of the production equipment. When winding, the film with static electricity is easy to absorb suspended particles in the workshop, causing the film to carry a certain amount of dust after winding. Secondly, the coil cannot be effectively compacted during the winding process, which makes it easy for bubbles to form inside the coil after winding, and it is difficult to ensure the compactness of the coil. Summary of the invention

[0005] The object of the present invention is to provide a film winding device and a winding method for polyimide film production, which can effectively eliminate static electricity, remove floating dust, and automatically adjust the pressing force to achieve high-quality and stable winding of the film.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A film winding device comprises a bottom shell;

[0008] A winding mechanism, which is arranged above the bottom shell and is used for winding;

[0009] A pre-treatment mechanism, which is arranged on one side of the bottom shell and is used to guide the material and remove static electricity and floating dust on the film;

[0010] A linkage mechanism, wherein the linkage mechanism is arranged inside the bottom shell;

[0011] A tensioning mechanism, the tensioning mechanism is arranged between the winding mechanism and the pretreatment mechanism, and is used for tensioning the film;

[0012] and, a material pressing mechanism, the material pressing mechanism being arranged above the winding mechanism, and comprising a lifting part and a compacting part;

[0013] Among them, the pretreatment mechanism includes a supporting part, which is connected to one side of the bottom shell, and the supporting part is rotatably connected with hollow rollers distributed in an array, and the hollow rollers are provided with through holes distributed in a ring shape. The supporting part is also equipped with static elimination components distributed in an array, and an air inlet part is connected between the multiple hollow rollers. An air delivery part is arranged in the bottom shell, and a reciprocating part is arranged at one end of the air delivery part. When the winding mechanism is working, the lifting part and the reciprocating part are driven to operate through a linkage mechanism.

[0014] In a preferred embodiment, the winding mechanism includes a vertical plate, two of the vertical plates are fixedly connected to the top surface of the bottom shell, and winding rollers are installed on the two vertical plates. A driving motor is also installed on one of the vertical plates, and the output shaft of the driving motor is connected to the central rotating shaft of the winding roller. A driving gear is installed at one end of the winding roller.

[0015] In a preferred embodiment, the support portion includes a lower support and an upper support, the lower support is fixedly connected to the side of the bottom shell, a support plate is fixedly connected to the lower support, an electric push rod is installed on the upper end of the support plate, and the telescopic end of the electric push rod is fixedly connected to the upper support.

[0016] In a preferred embodiment, the air intake portion includes an air intake pipe, which is rotatably connected to a hollow roller, a connecting pipe is connected between the plurality of air intake pipes, and a telescopic hose is connected between two connecting pipes on the upper and lower sides.

[0017] In a preferred embodiment, the gas delivery part includes hollow cylinders, which are arranged in an array inside the bottom shell and fixedly connected to the bottom surface of the inner cavity of the bottom shell by means of a support. An air outlet pipe is connected between the plurality of hollow cylinders, two exhaust pipes are connected to the air outlet pipe, and the other end of the exhaust pipe is connected to a telescopic hose. A one-way valve is provided at one end of the exhaust pipe close to the hollow cylinder, and an air inlet groove is provided at one end of the hollow cylinder in a ring-shaped distribution, and a sealing plate is rotatably connected in the air inlet groove.

[0018] In a preferred embodiment, the reciprocating part includes a sliding sleeve, which is fixedly connected to the bottom shell by a support rod, and a guide rod is slidably connected to the sliding sleeve, and one end of two adjacent guide rods close to each other is fixedly connected to an O-ring, wherein one end of two guide rods is fixedly connected to a cross plate, and sliding rods are connected to the cross plate in an array, and one end of the sliding rod passes through the hollow cylinder, and one end of the sliding rod located in the hollow cylinder is fixedly connected to a piston plate.

[0019] In a preferred embodiment, the linkage mechanism includes a first rotating rod, which is rotatably connected to a support provided in the bottom shell, and a first linkage gear and a second linkage gear are installed on the first rotating rod, and both ends of the first rotating rod are fixedly connected to a shifting rod.

[0020] In a preferred embodiment, the tensioning mechanism includes a support seat, the two support seats are fixedly connected to the top surface of the bottom shell, the support seat is rotatably connected with a rotating roller, both ends of the rotating roller are provided with a sliding groove, a sliding block is slidably connected in the sliding groove, both ends of the rotating roller are threadedly connected with a first threaded rod, and one end of the first threaded rod is rotatably connected to the sliding block, the top surface of the bottom shell is also fixedly connected with a first U-shaped frame, a lifting rod is slidably inserted on the first U-shaped frame, the lower end of the lifting rod is fixedly connected to the second U-shaped frame, and the second U-shaped frame is rotatably connected with a tensioning roller, the outer wall of the lower end of the lifting rod is sleeved with a compression spring, and the two ends of the compression spring are respectively connected to the first U-shaped frame and the second U-shaped frame, and the outer fixed sleeve of the sliding block is provided with a limiting ring.

[0021] In a preferred embodiment, the lifting part includes a second rotating rod, the second rotating rod is rotatably connected to a support arranged in the bottom shell, the middle end of the second rotating rod is installed with a transmission gear, the two ends of the second rotating rod are installed with a first bevel gear, the bottom shell is rotatably connected with two screw rods, and the lower end of the screw rod is installed with a second bevel gear, wherein the compacting part includes a first support frame, the first support frame is threadedly connected to the two screw rods, the first support frame is fixedly connected to the second support frame, the second support frame is hingedly provided with a third support frame, the lower end of the third support frame is rotatably connected to a pressing roller, the second support frame is slidably connected with a moving seat, the second support frame is threadedly connected with a second threaded rod, and the second threaded rod is rotatably connected to the moving seat, and a tension spring is connected between the moving seat and the third support frame.

[0022] A winding method for polyimide film production, applied to the above-mentioned film winding device, comprises the following steps:

[0023] Step 1: The formed film passes through the pretreatment mechanism and the tensioning mechanism in turn and enters the winding preparation stage. The electric push rod is controlled to extend and drive the upper support to move downward, so that the hollow rollers on the upper support and the lower support limit the film.

[0024] Step 2: Start the drive motor to drive the winding roller to rotate and start the winding operation. In the initial stage of winding, the pressure roller and the winding roller are closely fitted to ensure that the film is free of bubbles and is tight;

[0025] Step 3: The third support frame is hinged on the second support frame, and the pressing force of the pressing roller on the film is adjusted by cooperating with the moving seat and the tension spring. The second threaded rod is twisted to adjust the stretching amount of the tension spring, and the pressing force is adjusted according to the thickness of the film;

[0026] Step 4: The winding roller rotates to drive the driving gear, and the first rotating rod rotates synchronously through the toothed belt transmission. The rotation of the first rotating rod drives the first bevel gear and the second bevel gear to mesh and transmit, so that the screw rotates, and the first support frame rises with the thickness of the film, so as to maintain the contact between the nip roller and the film;

[0027] Step 5: The lever drives the O-ring to reciprocate, and the driving slide rod drives the piston plate to reciprocate in the hollow cylinder to realize the functions of pumping and exhausting. At the same time, the static elimination component is started to neutralize the static charge on the surface of the film. When exhausting, the compressed air enters the hollow roller through the pipe and blows out to eliminate the floating dust on the film and dissipate heat;

[0028] Step 6: The tensioning mechanism provides support for the film through two rotating rollers, and adjusts the position of the limit ring through the first threaded rod to improve the film winding stability. The tensioning roller arranged between the two rotating rollers applies a certain tensioning force by pressing down the film, and provides appropriate supporting force through the compression spring on the sliding rod to reduce deformation and damage of the film.

[0029] The technical effects achieved by the present invention are:

[0030] The present invention ensures that the film maintains proper tension during the winding process by setting a tensioning mechanism, thereby preventing problems such as wrinkles and stretching deformation caused by uneven tension. At the same time, the film is precisely limited by a limiting ring, effectively preventing the film from deflecting during the winding process, thereby improving the aesthetics and overall quality of the winding.

[0031] The present invention provides a static elimination component and a blowing structure to apply a reverse charge to the film surface to neutralize the static charge, and uses the blown gas to blow away the floating dust on the film. This design effectively reduces static electricity accumulation and dust adsorption, and avoids quality problems such as film adhesion and damage caused by static electricity, and dust carried after winding. This is of great significance for improving the cleanliness and performance of polyimide film.

[0032] The present invention provides a press roller and a linkage structure so that the press roller can automatically rise as the winding diameter increases and always maintain a state of being in contact with the film. During the winding process, the press roller can not only squeeze out the bubbles between two adjacent layers of film, but also make the adjacent films on both sides fit more closely, thereby improving the compactness of the winding. At the same time, by optimizing the design of the transmission mechanism, the automatic control and efficient operation of the winding process are achieved, and the production efficiency and the stability of product quality are improved. This improvement effectively solves the problem that the traditional fixed press assembly has a reduced pressing effect or even cannot be wound normally due to the increase in diameter in the later stage of film winding, and realizes efficient and stable continuous winding operation.

[0033] The present invention can automatically adjust the pressing force on the film according to the change of the film thickness by setting an adjustable pressing roller structure. When the film is thin, the pressing force is appropriately reduced to prevent damage to the film; when the film is thick, the pressing force is correspondingly increased to ensure a good winding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is a rear view of the overall structure of the present invention;

[0036] Figure 3 is a front sectional view of the present invention;

[0037] Figure 4 is a side sectional view of the bottom shell of the present invention;

[0038] Figure 5 is a top sectional view of the bottom shell of the present invention;

[0039] Figure 6 The present invention Figure 5 An enlarged schematic diagram of part A shown in FIG.

[0040] Figure 7 is a partial cross-sectional view of the hollow cylinder of the present invention;

[0041] Figure 8 is a side sectional view of the hollow cylinder of the present invention;

[0042] Fig. 9 It is a structural schematic diagram of the compacting part of the present invention;

[0043] Fig.10 is a partial cross-sectional view of the tensioning mechanism of the present invention;

[0044] Fig.11 It is a partial structural schematic diagram of the tensioning mechanism of the present invention.

[0045] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0046] 1. Bottom shell; 2. Winding mechanism; 3. Pretreatment mechanism; 4. Linkage mechanism; 5. Tensioning mechanism; 6. Pressing mechanism; 61. Lifting part; 62. Compacting part;

[0047] 201, vertical plate; 202, winding roller; 203, driving motor; 204, driving gear;

[0048] 31. Supporting part; 32. Hollow rotating roller; 33. Static elimination component; 34. Air inlet part; 35. Air delivery part; 36. Reciprocating part;

[0049] 311, lower support; 312, upper support; 313, support plate; 314, electric push rod;

[0050] 341, air intake pipe; 342, connecting pipe; 343, telescopic hose;

[0051] 351, hollow cylinder; 352, air outlet pipe; 353, exhaust pipe; 354, one-way valve; 355, air inlet groove; 356, sealing plate;

[0052] 361, sliding sleeve; 362, guide rod; 363, O-ring; 364, cross plate; 365, sliding rod; 366, piston plate;

[0053] 401, first rotating rod; 402, first linkage gear; 403, second linkage gear; 404, lever;

[0054] 501, support seat; 502, rotating roller; 503, slide groove; 504, slider; 505, first threaded rod; 506, first U-shaped frame; 507, lifting rod; 508, second U-shaped frame; 509, tensioning roller; 510, compression spring; 511, limiting ring;

[0055] 611, second rotating rod; 612, transmission gear; 613, first bevel gear; 614, lead screw; 615, second bevel gear;

[0056] 621, first support frame; 622, second support frame; 623, third support frame; 624, pressing roller; 625, moving seat; 626, second threaded rod; 627, tension spring. DETAILED DESCRIPTION

[0057] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0058] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0059] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0060] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0061] Please refer to the attached Figures 1 to 11 As shown, this embodiment provides a film winding device, including a bottom shell 1;

[0062] A winding mechanism 2, which is disposed above the bottom shell 1 and is used for winding;

[0063] The pre-treatment mechanism 3 is arranged on one side of the bottom shell 1 and is used for guiding the material and removing static electricity and floating dust on the film;

[0064] The linkage mechanism 4 is arranged inside the bottom shell 1;

[0065] A tensioning mechanism 5, which is arranged between the winding mechanism 2 and the pretreatment mechanism 3 and is used to tension the film;

[0066] and a pressing mechanism 6, which is disposed above the winding mechanism 2 and includes a lifting portion 61 and a compacting portion 62;

[0067] Among them, the pretreatment mechanism 3 includes a support part 31, which is connected to one side of the bottom shell 1. The support part 31 is rotatably connected with hollow rollers 32 distributed in an array, and the hollow rollers 32 are provided with through holes distributed in a ring shape. The support part 31 is also equipped with an array of static elimination components 33. An air inlet part 34 is connected between the multiple hollow rollers 32. An air delivery part 35 is arranged in the bottom shell 1, and a reciprocating part 36 is arranged at one end of the air delivery part 35. When the winding mechanism 2 is working, the lifting part 61 and the reciprocating part 36 are driven to operate through the linkage mechanism 4.

[0068] In this embodiment, the bottom shell 1 serves as the base of the entire device and is used to support other mechanisms. The winding mechanism 2 is installed above the bottom shell 1 and is responsible for rolling up the film. The pretreatment mechanism 3 is located on one side of the bottom shell 1 and is used to guide the film and remove static electricity and floating dust thereon. The mechanism includes a support portion 31, a hollow roller 32, an electrostatic elimination component 33, and an air intake portion 34. The linkage mechanism 4 is located inside the bottom shell 1 and is used to coordinate the linkage actions between the various mechanisms. The tensioning mechanism 5 is located between the winding mechanism 2 and the pretreatment mechanism 3 to ensure that the film maintains appropriate tension during the winding process. The pressing mechanism 6 is located above the winding mechanism 2 and includes a lifting portion 61 and a compacting portion 62, which are used to compact the film to ensure neat winding. When winding, the linkage mechanism 4 will drive the lifting portion 61 and the reciprocating portion 36 to operate, and the reciprocating portion 36 is connected to the air intake portion 34 through the air supply portion 35, and they work together to complete the pretreatment of the film.

[0069] It should be noted that the static elimination component 33 is a static eliminator, which can also be called a static elimination device. Its principle is as follows: it consists of a high-voltage power supply generator and a discharge electrode (generally made into an ion needle). The air is ionized into a large number of positive and negative ions through the high-voltage corona discharge at the tip, and then the large number of positive and negative ions are blown to the surface of the object by wind to neutralize the static electricity, or the static eliminator is directly placed close to the surface of the object to neutralize the static electricity. It uses products currently available on the market. When selecting a model, it should be selected to meet the requirements of this application as much as possible, on the premise that the specifications and usage scenarios are suitable. The specific model specifications are not limited here.

[0070] Next, please refer to Figure 2 and Figure 3 The winding mechanism 2 includes a vertical plate 201, and the two vertical plates 201 are fixedly connected to the top surface of the bottom shell 1. Winding rollers 202 are installed on the two vertical plates 201. A driving motor 203 is also installed on one of the vertical plates 201, and the output shaft of the driving motor 203 is connected to the central rotating shaft of the winding roller 202. A driving gear 204 is installed at one end of the winding roller 202. The supporting part 31 includes a lower support 311 and an upper support 312. The lower support 311 is fixedly connected to the side of the bottom shell 1, and a supporting plate 313 is fixedly connected to the lower support 311. An electric push rod 314 is installed on the upper end of the support plate 313, and the telescopic end of the electric push rod 314 is fixedly connected to the upper support 312.

[0071] In this embodiment, the processed film is sequentially and orderly passed through the pretreatment mechanism 3 and the tensioning mechanism 5 to ensure that the film reaches the best state before entering the next process. Finally, it is wound on the winding roller 202 and prepared for the next step of processing. In order to ensure the flatness and stability of the film during the winding process, the electric push rod 314 is controlled to extend, thereby driving the upper support 312 to move downward. This action makes the hollow roller 32 on the upper support 312 and the hollow roller 32 on the lower support 311 closely cooperate, and the film is precisely limited. In this way, the film can maintain uniform tension and a neat winding state during the winding process. Finally, the drive motor 203 is started, and its power is transmitted to the winding roller 202, causing it to start rotating. Driven by the motor, the winding roller 202 rotates at a constant speed, thereby realizing efficient winding of the film.

[0072] Next, please refer to Figure 2 The air intake portion 34 includes an air intake pipe 341, which is rotatably connected to the hollow roller 32, a connecting pipe 342 is connected between the multiple air intake pipes 341, and a telescopic hose 343 is connected between the two connecting pipes 342 on the upper and lower sides.

[0073] In this embodiment, the air inlet 34 is used to guide air or gas into other components. The air inlet pipe 341 is the pipeline part of the air inlet 34, which is used to transport gas and is rotatably connected to the hollow roller 32. When the hollow roller 32 is driven to rotate by the film, the air inlet pipe 341 will not be driven to rotate. Multiple air inlet pipes 341 are connected to each other through connecting pipes 342 to maintain the continuity and stability of the pipeline. The telescopic hose 343 is located between the connecting pipes 342 on the upper and lower sides. It is a telescopic hose used to adapt to changes in different lengths or provide a certain degree of flexibility.

[0074] Please refer again Figure 3 , Figure 5 and Figure 8 The gas delivery part 35 includes a hollow cylinder 351, which is arranged in an array distribution inside the bottom shell 1 and is fixedly connected to the bottom surface of the inner cavity of the bottom shell 1 by using a support. An air outlet pipe 352 is connected between the multiple hollow cylinders 351, and two exhaust pipes 353 are connected to the air outlet pipe 352, and the other end of the exhaust pipe 353 is connected to the telescopic hose 343. A one-way valve 354 is provided at one end of the exhaust pipe 353 close to the hollow cylinder 351, and an air inlet groove 355 is opened at one end of the hollow cylinder 351 in a ring-shaped distribution, and a sealing plate 356 is rotatably connected in the air inlet groove 355.

[0075] In this embodiment, the gas delivery part 35 includes a series of hollow cylinders 351, which are arranged in an array inside the bottom shell 1. The hollow cylinders 351 are connected by an air outlet pipe 352, and the air outlet pipe 352 is connected to two exhaust pipes 353. The other end of the exhaust pipe 353 is connected to the telescopic hose 343 to ensure that the gas can be transported out. A one-way valve 354 is provided at one end of each exhaust pipe 353 close to the hollow cylinder 351 to control the direction of gas flow. In addition, an air inlet groove 355 is distributed in an annular manner at one end of the hollow cylinder 351, and a sealing plate 356 is rotatably connected in the air inlet groove 355 to control the entry of gas. The entire structure is designed to efficiently and orderly transport and control the flow of gas.

[0076] It should be noted that the one-way valve 354 is a one-way valve that allows the fluid to flow only along the water inlet, but the medium at the water outlet cannot flow back, commonly known as a one-way valve. A one-way valve is also called a check valve or a non-return valve. It is used in hydraulic systems to prevent the reverse flow of oil, or in pneumatic systems to prevent the reverse flow of compressed air. The one-way valve 354 uses a product that is currently available on the market. When selecting a model, it should be selected as much as possible to meet the requirements of this application under the premise that the specifications and usage scenarios are suitable. The specific model specifications are not limited here.

[0077] It should be added that a torsion spring (not shown) is provided on the rotating shaft of the sealing plate 356. The torsion spring can restore the sealing plate 356 to its original position after flipping, thereby ensuring the sealing performance of the hollow cylinder 351 and facilitating air intake and exhaust.

[0078] Please refer again Figure 6 and Figure 7 The reciprocating portion 36 includes a sleeve 361, which is fixedly connected to the bottom shell 1 by a support rod. A guide rod 362 is slidably connected inside the sleeve 361, and one end of two adjacent guide rods 362 close to each other is fixedly connected to an O-ring 363, wherein one end of the two guide rods 362 is fixedly connected to a cross plate 364, and slide rods 365 are connected to the cross plate 364 in an array, and one end of the slide rod 365 passes through the hollow cylinder 351, and one end of the slide rod 365 located in the hollow cylinder 351 is fixedly connected to a piston plate 366.

[0079] In this embodiment, the first rotating rod 401 drives the lever 404 to rotate during the rotation process. The rotation of the lever 404 further causes the O-ring 363 to reciprocate, and drives the guide rod 362, the cross plate 364 and the slide rod 365 to reciprocate synchronously. The movement of the slide rod 365 enables the piston plate 366 to achieve the functions of suction and exhaust inside the hollow cylinder 351. In the exhaust stage, the compressed air enters the telescopic hose 343 through the air outlet pipe 352 and the exhaust pipe 353, then flows into the connecting pipe 342, and finally enters the hollow roller 32. The air is discharged from the through hole of the hollow roller 32, and the static elimination component 33 is activated during this process to eliminate the static electricity on the surface of the film. By applying a reverse charge to the surface of the film, the static charge is neutralized, thereby reducing the accumulation of static electricity. In addition, the exhaust gas is used to remove the floating dust on the film, and the film is cooled by blowing to prevent the film from sticking, deforming or melting due to heat accumulation.

[0080] During the air extraction operation, since the one-way valve 354 is provided on the exhaust pipe 353, the gas cannot flow in reverse, thereby preventing the film from being sucked in and deformed due to the suction force generated by the through hole on the hollow roller 32. At this time, under the action of atmospheric pressure, the sealing plate 356 turns inward, allowing air to enter the hollow cylinder 351 through the air inlet groove 355. After the air extraction is completed, due to the balance of the internal and external atmospheric pressures, the sealing plate 356 will be reset, closing the air inlet groove 355, ensuring that air will not leak from here during exhaust.

[0081] Please refer again Figures 4 to 6 The linkage mechanism 4 includes a first rotating rod 401, which is rotatably connected to a support provided in the bottom shell 1, and a first linkage gear 402 and a second linkage gear 403 are installed on the first rotating rod 401. Both ends of the first rotating rod 401 are fixedly connected to a shifting rod 404.

[0082] In this embodiment, the first rotating rod 401 is a rotatable rod, and the first rotating rod 401 is rotatably connected to the support in the bottom shell 1. This means that the support is fixed in the bottom shell 1, providing a support point for the first rotating rod 401 to rotate. The first linkage gear 402 and the second linkage gear 403 are installed above the first rotating rod 401. The linkage gears work in coordination with other gears, and the rotation of one gear drives the rotation of another gear. The two ends of the first rotating rod 401 are fixedly connected with the lever 404, which is a rod used to pull other components, and they operate with the rotation of the first rotating rod 401.

[0083] Please refer again Fig.10 and Fig.11The tensioning mechanism 5 includes a support seat 501, and the two support seats 501 are fixedly connected to the top surface of the bottom shell 1. A rotating roller 502 is rotatably connected to the support seat 501. Both ends of the rotating roller 502 are provided with a slide groove 503, and a slider 504 is slidably connected in the slide groove 503. Both ends of the rotating roller 502 are threadedly connected with a first threaded rod 505, and one end of the first threaded rod 505 is rotatably connected to the slider 504. The top surface of the bottom shell 1 is also fixedly connected to a first U-shaped frame 506, and a lifting rod 507 is slidably inserted on the first U-shaped frame 506. The lower end of the lifting rod 507 is fixedly connected to a second U-shaped frame 508, and a tensioning roller 509 is rotatably connected to the second U-shaped frame 508. The outer wall of the lower end of the lifting rod 507 is provided with a compression spring 510, and the two ends of the compression spring 510 are respectively connected to the first U-shaped frame 506 and the second U-shaped frame 508, and the outer fixed sleeve of the slider 504 is provided with a limiting ring 511.

[0084] In this embodiment, during the film winding process, two rotating rollers 502 are used to effectively support the film. The two rotating rollers 502 can realize the movement of the slider 504 by twisting the first threaded rod 505. The movement of the slider 504 will further drive the movement of the limiting ring 511, thereby realizing the precise adjustment of the position of the limiting rings 511 at both ends of the rotating roller 502. Through this adjustment, it can be ensured that the limiting rings 511 at both ends can effectively limit the film, prevent the film from deviating during the winding process, and thus improve the winding stability.

[0085] In addition, a tensioning roller 509 is specially provided between the two rotating rollers 502. The function of the tensioning roller 509 is to apply a certain tensioning force by pressing down the film to ensure that the film maintains appropriate tension during the winding process, thereby further improving the quality and stability of the winding. In order to achieve this function, the second U-shaped frame 508 on the tensioning roller 509 is slidably connected to the first U-shaped frame 506 through the sliding rod 365.

[0086] A compression spring 510 is also sleeved on the slide bar 365. The function of the compression spring 510 is to provide appropriate support force when the film passes through, so as to reduce the deformation and damage that may occur to the film during the winding process. Through this design, it is possible to ensure that the film remains flat during the winding process, avoid film damage caused by excessive or uneven tension, and thus improve the overall quality and efficiency of film winding.

[0087] Please refer again Figure 4 , Figure 5 and Fig. 9The lifting part 61 includes a second rotating rod 611, which is rotatably connected to a support provided in the bottom shell 1, a transmission gear 612 is installed at the middle end of the second rotating rod 611, and first bevel gears 613 are installed at both ends of the second rotating rod 611. Two screw rods 614 are rotatably connected to the bottom shell 1, and a second bevel gear 615 is installed at the lower end of the screw rod 614. The compacting part 62 includes a first support frame 621, and the first support frame 621 is threadedly connected to the two screw rods 614. A second support frame 622 is fixedly connected to the first support frame 621, a third support frame 623 is hinged on the second support frame 622, a pressing roller 624 is rotatably connected to the lower end of the third support frame 623, a movable seat 625 is slidably connected inside the second support frame 622, a second threaded rod 626 is threadedly connected to the second support frame 622, and the second threaded rod 626 is rotatably connected to the movable seat 625, and a tension spring 627 is connected between the movable seat 625 and the third support frame 623.

[0088] In this embodiment, in the initial state, the nip roller 624 is closely attached to the winding roller 202. In the process of winding operation, the nip roller 624 applies pressure to the film, which can not only effectively squeeze out the bubbles generated between the two adjacent layers of film during the winding process, but also make the films on the adjacent sides more closely attached. Such operation significantly improves the compactness of the winding, thereby ensuring the excellent winding effect. In addition, the third support frame 623 is connected to the second support frame 622 in a hinged manner, so that the third support frame 623 can rotate freely. A tension spring 627 is connected between the movable seat 625 on the second support frame 622 and the third support frame 623, which enables the nip roller 624 to maintain a certain pressure to ensure its pressure covering effect on the film. At the same time, by twisting the second threaded rod 626, the movable seat 625 can be driven to move, thereby adjusting the stretching amount of the tension spring 627. In this way, the pressing force of the nip roller 624 on the film can be flexibly adjusted to adapt to films of different thicknesses. When the film is thin, the pressure of the nip roller 624 should be appropriately reduced to avoid damage to the film; when the film is thick, the pressure of the nip roller 624 can be appropriately increased to ensure the reliability of the pressing effect. When the winding roller 202 rotates, it drives the driving gear 204 to rotate together. The driving gear 204 is connected to the second linkage gear 403 through a toothed belt transmission, which prompts the first rotating rod 401 to rotate synchronously. The transmission gear 612 is connected to the first linkage gear 402 through a toothed belt transmission, which in turn prompts the second rotating rod 611 to rotate. The first bevel gear 613 and the second bevel gear 615 are meshed and driven to drive the screw 614 to rotate. The rotation of the screw 614 will drive the first support frame 621 to rise slowly, so that the nip roller 624 rises accordingly as the winding diameter increases. Such a design ensures that the nip roller 624 can always maintain a close fit with the film without adversely affecting the winding process. As the film wound on the winding roller 202 increases, the diameter of the winding roller 202 will gradually increase. If the interaction force between the winding roller 202 and the nip roller 624 becomes larger and larger, it may cause the winding process to fail. In order to avoid this situation, the above-mentioned mechanical structure design ensures the smooth winding process, thereby solving the interaction force problem caused by the increase in the diameter of the winding roller 202.

[0089] It should be noted that a vertical rod is provided on the top surface of the bottom shell 1 and located at the first support frame 621 , and the vertical rod is slidably connected to the first support frame 621 for guiding and limiting to ensure the stability of the movement of the first support frame 621 .

[0090] A winding method for polyimide film production, applied to the above-mentioned film winding device, comprises the following steps:

[0091] Step 1: The formed film passes through the pretreatment mechanism 3 and the tensioning mechanism 5 in sequence and enters the winding preparation stage, the electric push rod 314 is controlled to extend, and the upper support 312 is driven to move downward, so that the hollow roller 32 on the upper support 312 and the lower support 311 limits the film;

[0092] Step 2: Start the drive motor 203 to drive the winding roller 202 to rotate and start the winding operation. In the initial stage of winding, the pressure roller 624 is closely attached to the winding roller 202 to ensure that the film is free of bubbles and is tight;

[0093] Step 3: The third support frame 623 is hinged on the second support frame 622. The pressing force of the pressing roller 624 on the film is adjusted by the cooperation between the movable seat 625 and the tension spring 627. The second threaded rod 626 is twisted to adjust the stretching amount of the tension spring 627. The pressing force is adjusted according to the thickness of the film.

[0094] Step 4: The winding roller 202 rotates to drive the driving gear 204 to rotate, and the first rotating rod 401 rotates synchronously through the toothed belt transmission. The rotation of the first rotating rod 401 drives the first bevel gear 613 and the second bevel gear 615 to mesh and transmit, so as to cause the screw rod 614 to rotate, so that the first support frame 621 rises with the thickness of the film, and the nip roller 624 is kept in contact with the film;

[0095] Step 5: The lever 404 drives the O-ring 363 to reciprocate, and the driving slide rod 365 drives the piston plate 366 to reciprocate in the hollow cylinder 351 to realize the functions of pumping and exhausting. At the same time, the static elimination component 33 is started to neutralize the static charge on the surface of the film. When exhausting, the compressed air enters the hollow roller 32 through the pipeline and blows out to eliminate the floating dust on the film and dissipate heat;

[0096] Step six: The tensioning mechanism 5 provides support for the film through two rotating rollers 502, and adjusts the position of the limit ring 511 through the first threaded rod 505 to improve the film winding stability. The tensioning roller 509 arranged between the two rotating rollers 502 applies a certain tensioning force by pressing down the film, and provides appropriate supporting force through the compression spring 510 on the slide rod 365 to reduce deformation and damage of the film.

[0097] The working principle of the present invention is:

[0098] During the winding process, the formed film is first passed through the pretreatment mechanism 3 and the tensioning mechanism 5 in sequence, and finally wound on the winding roller 202. Subsequently, the electric push rod 314 is controlled to extend, driving the upper support 312 to move downward, ensuring that the hollow roller 32 on the upper support 312 and the hollow roller 32 on the lower support 311 limit the film. The drive motor 203 is started to rotate the winding roller 202 to complete the winding operation. In the initial stage of winding, the pressure roller 624 is tightly fitted with the winding roller 202. During the winding process, the pressure roller 624 applies pressure to the film, which can not only eliminate the bubbles generated between the two adjacent layers of film, but also enhance the fit of the adjacent two sides of the film, improve the winding tightness, and ensure the winding quality.

[0099] The third support frame 623 is hinged on the second support frame 622 so that it can rotate. A tension spring 627 is provided between the moving seat 625 on the second support frame 622 and the third support frame 623 to give a certain pressure to the pressing roller 624. By twisting the second threaded rod 626, the moving seat 625 is driven to move, and then the stretching amount of the tension spring 627 is adjusted to adjust the pressing force of the pressing roller 624 on the film. When processing a thinner film, the pressure of the pressing roller 624 should be reduced to prevent damage to the film; when processing a thicker film, the pressure should be appropriately increased to ensure the pressing effect.

[0100] When the winding roller 202 rotates, the driving gear 204 is driven to rotate. The driving gear 204 and the second linkage gear 403 are driven by a toothed belt, so that the first rotating rod 401 rotates synchronously. The transmission gear 612 and the first linkage gear 402 are driven by a toothed belt, so that the second rotating rod 611 rotates. The first bevel gear 613 and the second bevel gear 615 are meshed and driven to drive the screw rod 614 to rotate. The rotation of the screw rod 614 causes the first support frame 621 to rise slowly, ensuring that the pressing roller 624 rises with the increase of the winding diameter, maintains the contact with the film, and does not affect the winding process.

[0101] When the first rotating rod 401 rotates, it drives the lever 404 to rotate. The rotation of the lever 404 causes the O-ring 363 to reciprocate, thereby driving the guide rod 362, the cross plate 364 and the slide rod 365 to reciprocate. The slide rod 365 drives the piston plate 366 to reciprocate in the hollow cylinder 351 to achieve air extraction and exhaust. When exhausting, the compressed air enters the telescopic hose 343 through the outlet pipe 352 and the exhaust pipe 353, then flows into the connecting pipe 342, and finally enters the hollow roller 32 through the inlet pipe 341, and is blown out from the through hole on the hollow roller 32. At the same time, the static elimination component 33 is started to eliminate the static electricity on the film, and the static charge on the surface of the film is neutralized by applying a reverse charge to reduce the accumulation of static electricity. The blown gas can remove the floating dust on the film, and prevent the film from being affected by the quality of the film due to the difficulty in removing heat, such as adhesion, deformation or melting, by dissipating heat.

[0102] During the air extraction process, since the one-way valve 354 is provided on the exhaust pipe 353, the gas cannot flow back, preventing the through hole on the hollow roller 32 from generating suction and causing deformation of the film. Under the action of atmospheric pressure, the sealing plate 356 flips inward, allowing air to enter the hollow cylinder 351 from the air inlet groove 355. After the air extraction is completed, since the internal and external atmospheric pressures are balanced, the sealing plate 356 is reset to close the air inlet groove 355 to prevent air leakage during exhaust.

[0103] The tensioning mechanism 5 provides support for the film through two rotating rollers 502, and drives the slider 504 to move by twisting the first threaded rod 505, thereby driving the limit ring 511 to move, and adjusting the position of the limit rings 511 at both ends of the rotating roller 502 to limit the film and improve the winding stability. The tensioning roller 509 is set between the two rotating rollers 502, and applies a certain tensioning force by pressing down on the film. The second U-shaped frame 508 on the tensioning roller 509 is slidably connected to the first U-shaped frame 506 through the sliding rod 365, and a compression spring 510 is set on the sliding rod 365 to provide appropriate support force when the film passes through, reducing deformation and damage of the film.

[0104] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A film winding device, characterized in that: Including bottom shell; A winding mechanism, which is arranged above the bottom shell and is used for winding; A pre-treatment mechanism, which is arranged on one side of the bottom shell and is used to guide the material and remove static electricity and floating dust on the film; A linkage mechanism, wherein the linkage mechanism is arranged inside the bottom shell; A tensioning mechanism, the tensioning mechanism is arranged between the winding mechanism and the pretreatment mechanism, and is used for tensioning the film; and a material pressing mechanism, the material pressing mechanism being arranged above the winding mechanism, and comprising a lifting part and a compacting part; The pretreatment mechanism includes a support part, which is connected to one side of the bottom shell, and the support part is rotatably connected with hollow rollers in an array, and the hollow rollers are provided with through holes in an annular shape, and the support part is also provided with static elimination components in an array, and an air inlet part is connected between the plurality of hollow rollers, and an air delivery part is provided in the bottom shell, and a reciprocating part is provided at one end of the air delivery part, and when the winding mechanism is working, the lifting part and the reciprocating part are driven to operate through a linkage mechanism; The lifting part includes a second rotating rod, the second rotating rod is rotatably connected to a support arranged in the bottom shell, a transmission gear is installed at the middle end of the second rotating rod, and a first bevel gear is installed at both ends of the second rotating rod, and two screw rods are rotatably connected to the bottom shell, and a second bevel gear is installed at the lower end of the screw rod. The compacting part includes a first support frame, the first support frame is threadedly connected to the two screw rods, the first support frame is fixedly connected to the second support frame, the second support frame is hingedly provided with a third support frame, the lower end of the third support frame is rotatably connected to a pressing roller, and a moving seat is slidably connected in the second support frame, the second support frame is threadedly connected to the second threaded rod, and the second threaded rod is rotatably connected to the moving seat, and a tension spring is connected between the moving seat and the third support frame.

2. The film winding device according to claim 1, characterized in that: The winding mechanism includes vertical plates, two of which are fixedly connected to the top surface of the bottom shell, and winding rollers are installed on the two vertical plates. A driving motor is also installed on one of the vertical plates, and the output shaft of the driving motor is connected to the central rotating shaft of the winding roller. A driving gear is installed at one end of the winding roller.

3. The film winding device according to claim 1, characterized in that: The support portion includes a lower support and an upper support, the lower support is fixedly connected to the side of the bottom shell, a support plate is fixedly connected to the lower support, an electric push rod is installed on the upper end of the support plate, and the telescopic end of the electric push rod is fixedly connected to the upper support.

4. The film winding device according to claim 1, characterized in that: The air intake part comprises an air intake pipe, which is rotatably connected to a hollow roller, a connecting pipe is connected between the plurality of air intake pipes, and a telescopic hose is connected between two connecting pipes at the upper and lower sides.

5. The film winding device according to claim 4, characterized in that: The gas delivery part includes hollow cylinders, which are arranged in an array distribution inside the bottom shell and fixedly connected to the bottom surface of the inner cavity of the bottom shell by means of a support. An air outlet pipe is connected between the plurality of hollow cylinders, two exhaust pipes are connected to the air outlet pipe, and the other end of the exhaust pipe is connected to a telescopic hose. A one-way valve is provided at one end of the exhaust pipe close to the hollow cylinder, and an air inlet groove is opened at one end of the hollow cylinder in a ring distribution, and a sealing plate is rotatably connected in the air inlet groove.

6. The film winding device according to claim 1, characterized in that: The reciprocating part includes a sliding sleeve, which is fixedly connected to the bottom shell by a support rod, and a guide rod is slidably connected to the sliding sleeve, and one end of two adjacent guide rods close to each other is fixedly connected to an O-ring, wherein one end of two guide rods is fixedly connected to a cross plate, and sliding rods are connected to the cross plate in an array, and one end of the sliding rod passes through the hollow cylinder, and one end of the sliding rod located in the hollow cylinder is fixedly connected to a piston plate.

7. The film winding device according to claim 1, characterized in that: The linkage mechanism comprises a first rotating rod, which is rotatably connected to a support arranged in the bottom shell, a first linkage gear and a second linkage gear are installed on the first rotating rod, and both ends of the first rotating rod are fixedly connected to a shifting rod.

8. The film winding device according to claim 1, characterized in that: The tensioning mechanism includes a support seat, the two support seats are fixedly connected to the top surface of the bottom shell, the support seat is rotatably connected with a rotating roller, both ends of the rotating roller are provided with a sliding groove, a sliding block is slidably connected in the sliding groove, both ends of the rotating roller are threadedly connected with a first threaded rod, and one end of the first threaded rod is rotatably connected to the sliding block, the top surface of the bottom shell is also fixedly connected with a first U-shaped frame, a lifting rod is slidably inserted on the first U-shaped frame, the lower end of the lifting rod is fixedly connected to the second U-shaped frame, and the second U-shaped frame is rotatably connected with a tensioning roller, the outer wall of the lower end of the lifting rod is sleeved with a compression spring, and the two ends of the compression spring are respectively connected to the first U-shaped frame and the second U-shaped frame, and the outer fixed sleeve of the sliding block is provided with a limiting ring.

9. A winding method for the production of polyimide film, characterized in that: A film winding device as claimed in any one of claims 1 to 8, comprising the following steps: The formed film passes through the pretreatment mechanism and the tensioning mechanism in turn and enters the winding preparation stage. The electric push rod is controlled to extend and drive the upper support to move downward, so that the hollow rollers on the upper support and the lower support limit the film. Start the drive motor to drive the winding roller to rotate and start the winding operation. In the initial stage of winding, the pressure roller and the winding roller are closely fitted to ensure that the film is free of bubbles and is tight; The third support frame is hinged on the second support frame. The pressing force of the pressing roller on the film is adjusted by cooperating with the moving seat and the tension spring. The second threaded rod is twisted to adjust the stretching amount of the tension spring, and the pressing force is adjusted according to the thickness of the film. The rotation of the winding roller drives the driving gear to rotate, and the first rotating rod rotates synchronously through the toothed belt transmission. The rotation of the first rotating rod drives the first bevel gear and the second bevel gear to mesh and transmit, so as to rotate the screw rod, so that the first supporting frame rises as the thickness of the film changes, and the nip roller and the film are kept in contact. The lever drives the O-ring to reciprocate, and the driving slide rod drives the piston plate to reciprocate in the hollow cylinder to realize the functions of pumping and exhausting. At the same time, the static elimination component is started to neutralize the static charge on the surface of the film. When exhausting, the compressed air enters the hollow roller through the pipeline and blows out to eliminate the floating dust on the film and dissipate heat; The tensioning mechanism provides support for the film through two rotating rollers, and adjusts the position of the limit ring through the first threaded rod to improve the stability of film winding. The tensioning roller arranged between the two rotating rollers applies a certain tensioning force by pressing down on the film, and provides appropriate supporting force through the compression spring on the sliding rod to reduce deformation and damage of the film.

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