A glue circulating coating device for pre-coating film production

Abstract

The application belongs to the technical field of precoating film production, and discloses a glue circulating coating device for precoating film production, which comprises a supporting frame, the top end of the supporting frame is fixed with a guide frame, the driving end of a driving motor is fixed with a coating roller, one end of a coating frame is provided with a tensioning mechanism, and the top end of the coating frame is fixed with a coating mechanism. The glue box, mounting plate, tooth ring and other structures are matched, so that the device can drive the tooth ring to rotate synchronously when the coating roller rotates, the tooth ring drives the transmission gear to rotate and slide along the guide groove of the guide ring through the transmission rod, the half gear and the turbulence rod are driven to reciprocate, the glue in the glue box is stirred transversely, the half gear is engaged with the turbulence frame to drive the turbulence frame to reciprocate along the guide block, the cross flow field is formed by the swinging turbulence and the reciprocating flow to eliminate the deposition dead angle and the stagnation area in the glue box, and finally the effect of uniform glue flow and deposition prevention in the whole tank without an additional power source is achieved.

Description

Technical Field

[0001] This invention belongs to the field of pre-coated film production technology, specifically a pre-coated film production adhesive circulation coating device. Background Technology

[0002] In the production of pre-coated films, adhesive coating is generally carried out by immersing the coating roller into the adhesive box. When the coating roller rotates, the surface is dipped in adhesive. When the film passes over the coating roller, it picks up the adhesive. The adhesive in the adhesive box needs to be kept to flow evenly and at a constant temperature to prevent solid components from settling, surface skinning, and local aging.

[0003] CN215465742U discloses a pre-coated film adhesive application device, including a coating roller, a pressure roller, a circulation box, a receiving box, a spray pipe, a circulation pipe, an adhesive inlet pipe, and a scraper. The bottom of the coating roller extends into the circulation box. The spray pipe is located directly below the coating roller and sprays adhesive onto the coating roller through a nozzle. The circulation pipe sends the adhesive in the circulation box back to the receiving box. The receiving box is equipped with a stirring shaft and a stirring rod to stir the adhesive. The scraper spreads the adhesive on the coating roller evenly.

[0004] This device can maintain the flow of glue through circulation pipelines and stirring shafts, reducing the problem of glue solidification. However, it cannot perform multi-directional turbulence and axial flow circulation of glue in the glue box while the coating roller is dipped in glue. Its stirring relies solely on an independent stirring shaft in the container, which has a limited stirring range and cannot create a cross-flow field between the lateral and axial directions in the glue box. Glue sedimentation and dead zones still exist at the bottom and corners of the glue box. At the same time, the independent stirring shaft requires additional driving power, increasing equipment cost and energy consumption. Therefore, a glue circulation coating device for pre-coated film production is proposed. This device can use the rotational power of the coating roller itself to synchronously drive the oscillating and reciprocating mechanisms in the glue box. While the coating roller is dipped in glue, it can perform lateral turbulence and axial flow circulation of glue in the glue box. It can achieve uniform flow of glue throughout the tank and prevent sedimentation without an additional power source. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides an adhesive circulating coating device for pre-coated film production.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pre-coated film production adhesive circulating coating device, comprising a support frame, a guide frame fixed at the top of the support frame, a coating frame fixed at one end of the support frame, a drive motor fixed at the top of the coating frame, a coating roller fixed at the drive end of the drive motor, a tensioning mechanism installed at one end of the coating frame, and a coating mechanism fixed at the top of the coating frame.

[0007] The tensioning mechanism includes a support plate, a first tensioning rod, and a second tensioning rod. The support plate is rotatably connected to the outside of the coating roller, the first tensioning rod is rotatably connected to one end of the support plate, and the second tensioning rod is rotatably connected to one end of the support plate.

[0008] The coating mechanism includes an adhesive box, a mounting plate, and a toothed ring. The adhesive box is fixed to the top of the coating frame, the mounting plate is fixed to the bottom of the adhesive box, and the toothed ring is fixed to one end of the coating roller.

[0009] Preferably, one end of the coating rack is rotatably connected to a cylinder, and two sets of support plates are provided. The support plates are symmetrically distributed about the central axis of the coating roller. The symmetrical distribution of the two sets of support plates ensures that both sides of the coating roller are supported and limited simultaneously. When the support plates rotate, forces are applied synchronously on both sides, and the tension of the pre-coated film is equal on both sides in the width direction, thus avoiding the coating deviation caused by the slack of one side of the pre-coated film.

[0010] Preferably, the inner wall of the coating rack is provided with an arc groove, the outer wall of the first tensioning rod is attached to the inner wall of the arc groove, the first tensioning rod and the arc groove are adapted, and when the first tensioning rod slides along the arc groove, the inner wall of the arc groove limits the movement trajectory of the first tensioning rod. The swing angle of the support plate is constrained by the two ends of the arc groove to prevent the support plate from swinging too much, which would cause the pre-coated film to be over-tensioned or detached.

[0011] Preferably, there are two sets of cylinders, which are symmetrically distributed about the central axis of the coating frame. The extension end of the cylinder is rotatably connected to the support plate. The two sets of cylinders drive the two sets of support plates to rotate synchronously. The tension on both sides is provided by independent cylinders. When the tension on both sides of the pre-coated film is inconsistent in the width direction, the extension of one side cylinder can be adjusted to compensate for the tension, so that the overall tension of the pre-coated film is balanced.

[0012] Preferably, a transmission gear is rotatably connected to one end of the mounting plate, a transmission rod is fixed to one end of the transmission gear, a half gear is rotatably connected to one end of the mounting plate, a guide ring is fixed to the top of the half gear, a spoiler rod is fixed to one end of the half gear, a guide block is fixed to one end of the mounting plate, a spoiler frame is slidably connected inside the guide block, a spoiler plate is rotatably connected to the outside of the spoiler frame, and a torsion spring is fixed to one end of the spoiler plate. The transmission gear converts the continuous rotation of the gear ring into the reciprocating oscillation of the half gear and the spoiler rod, as well as the reciprocating movement of the spoiler frame and the spoiler plate, through the transmission rod and the guide ring. One transmission link simultaneously outputs two motion forms: lateral oscillation and axial movement, resulting in a compact structure and fewer transmission links.

[0013] Preferably, there are two sets of mounting plates, which are symmetrically distributed about the central axis of the glue box. There are also two sets of toothed rings, which are symmetrically distributed about the central axis of the coating roller. Each end of the coating roller is driven by a set of toothed rings to operate a transmission mechanism. Transverse turbulence and axial flow are generated simultaneously on both sides of the glue box. The glue flow state along both sides of the central axis in the glue box is symmetrical, and the overall flow field is uniform and free from flow deviation.

[0014] Preferably, the gear ring and the transmission gear are meshed together, the inner wall of the guide ring is provided with a guide groove, the outer wall of the transmission rod is in contact with the inner wall of the guide groove, the transmission rod and the guide ring are slidably connected, the gear ring and the transmission gear directly mesh to transmit rotational motion, and the transmission rod slides along the guide groove of the guide ring to convert the rotational motion into oscillation. The shape of the guide groove determines the amplitude and speed curve of the oscillation. By changing the contour of the guide groove, the oscillation parameters of the turbulence rod can be adjusted to adapt to adhesives of different viscosities.

[0015] Preferably, two sets of the turbulence rods are provided, and the turbulence rods are symmetrically distributed about the central axis of the half gear. When the two sets of turbulence rods swing synchronously with the half gear, the two sets of turbulence rods simultaneously stir the glue on both sides of the half gear, and the turbulence coverage area is expanded to the area on both sides of the half gear. The turbulence area of ​​a single swing is increased, and the uniformity of glue flow in the width direction is improved.

[0016] Preferably, two sets of guide blocks are provided, and the guide blocks are symmetrically distributed about the central axis of the mounting plate. The two sets of guide blocks guide and limit the baffle frame from both sides. When the baffle frame moves back and forth, the running trajectory is stable and does not wobble. The pushing direction of the baffle plate is kept parallel to the axis of the coating roller, so as to avoid the baffle frame from tilting and causing the pushing direction of the baffle plate to deviate.

[0017] Preferably, the spoiler is provided in two sets, which are symmetrically distributed about the spoiler frame. One end of the torsion spring is fixedly connected to the spoiler frame. The torsion spring is used to rotate the spoiler. The two sets of spoilers alternately push and spread evenly when the spoiler frame moves back and forth. The torsion spring causes the spoiler to automatically reset after deflection. The deflection angle of the spoiler changes with the direction of movement, realizing dynamic switching of the propulsion direction and the propulsion area, and enhancing the axial propulsion effect.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention, through the coordinated arrangement of a glue box, mounting plate, and gear ring, enables the device to synchronously rotate the gear ring as the coating roller rotates. The gear ring drives the transmission gear to rotate and slides along the guide groove of the guide ring via a transmission rod, causing the half gear and the baffle rod to oscillate back and forth, thus laterally turbulent and agitating the glue in the glue box. Simultaneously, the half gear meshes with the baffle frame, causing the baffle frame to move back and forth along the guide block. The baffle plate moves under the influence of the baffle frame and resets after its angle changes via a torsion spring, thus axially propelling and circulating the glue. The oscillating turbulence and the reciprocating propulsion form a cross flow field, eliminating sedimentation dead zones and stagnant areas in the glue box. Ultimately, this achieves the effect of uniform flow of glue throughout the entire tank and preventing sedimentation without an additional power source.

[0020] This invention, through the coordinated arrangement of a support plate, a first tensioning rod, and a second tensioning rod, enables the device to rotate the support plate around the central axis of the coating roller via a cylinder. The support plate drives the first and second tensioning rods to swing synchronously. The first tensioning rod slides and is limited along the arc groove on the inner wall of the coating rack, ensuring a stable tension force as the pre-coated film winds through the coating roller, the first tensioning rod, and the second tensioning rod. The symmetrical distribution of the two sets of support plates and cylinders about the central axis of the coating roller ensures balanced tension on both sides, preventing the pre-coated film from loosening, deviating, or wrinkling during the coating process. This ensures that the adhesive on the surface of the coating roller is evenly transferred to the surface of the pre-coated film, ultimately achieving a uniform coating thickness. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the coating rack structure of the present invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged cross-sectional view of a portion of point A in the middle section;

[0024] Figure 4 This is a schematic diagram of the tensioning mechanism structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the coating rack structure of the present invention;

[0026] Figure 6 This is an enlarged structural schematic diagram of the coating mechanism of the present invention;

[0027] Figure 7 This is an enlarged structural diagram of the coating mechanism of the present invention;

[0028] Figure 8 For the present invention Figure 7 Enlarged cross-sectional view of a portion of point A in the middle section;

[0029] Figure 9For the present invention Figure 7 Enlarged cross-sectional view of section B in the middle.

[0030] In the diagram: 1. Support frame; 2. Guide frame; 3. Coating frame; 4. Drive motor; 5. Coating roller; 6. Tensioning mechanism; 601. Support plate; 602. First tensioning rod; 603. Second tensioning rod; 604. Cylinder; 7. Coating mechanism; 701. Glue box; 702. Mounting plate; 703. Gear ring; 704. Transmission gear; 705. Transmission rod; 706. Half gear; 707. Guide ring; 708. Spoiler bar; 709. Guide block; 710. Spoiler frame; 711. Spoiler plate; 712. Torsion spring. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 9 As shown, the present invention provides a pre-coated film production adhesive circulating coating device, including a support frame 1, a guide frame 2 fixed at the top of the support frame 1, a coating frame 3 fixed at one end of the support frame 1, a drive motor 4 fixed at the top of the coating frame 3, a coating roller 5 fixed at the drive end of the drive motor 4, a tensioning mechanism 6 installed at one end of the coating frame 3, and a coating mechanism 7 fixed at the top of the coating frame 3.

[0033] like Figures 1 to 9 As shown, the tensioning mechanism 6 includes a support plate 601, a first tensioning rod 602, and a second tensioning rod 603. The support plate 601 is rotatably connected to the outside of the coating roller 5. The first tensioning rod 602 is rotatably connected to one end of the support plate 601, and the second tensioning rod 603 is rotatably connected to one end of the support plate 601. A cylinder 604 is rotatably connected to one end of the coating frame 3. Two sets of support plates 601 are provided, and the support plates 601 are symmetrically distributed about the central axis of the coating roller 5. An arc groove is opened on the inner wall of the coating frame 3. The outer wall of the first tensioning rod 602 fits into the inner wall of the arc groove. The first tensioning rod 602 and the arc groove are adapted to each other. Two sets of cylinders 604 are provided, and the cylinders 604 are symmetrically distributed about the central axis of the coating frame 3. The extension end of the cylinder 604 is rotatably connected to the support plate 601.

[0034] The above solution is adopted: by starting the cylinder 604, the support plate 601 is rotated about the central axis of the coating roller 5, so that the first tensioning rod 602 and the second tensioning rod 603 rotate accordingly, so that the pre-coated film can be tensioned when it is wrapped around the coating roller 5, the first tensioning rod 602 and the second tensioning rod 603.

[0035] like Figures 1 to 9 As shown, the coating mechanism 7 includes an adhesive box 701, a mounting plate 702, and a gear ring 703. The adhesive box 701 is fixed to the top of the coating frame 3, the mounting plate 702 is fixed to the bottom of the adhesive box 701, and the gear ring 703 is fixed to one end of the coating roller 5. A transmission gear 704 is rotatably connected to one end of the mounting plate 702, and a transmission rod 705 is fixed to one end of the transmission gear 704. A half gear 706 is rotatably connected to one end of the mounting plate 702, a guide ring 707 is fixed to the top of the half gear 706, and a baffle rod 708 is fixed to one end of the half gear 706. A guide block 709 is fixed to one end of the mounting plate 702, a baffle frame 710 is slidably connected inside the guide block 709, and a baffle plate 711 is rotatably connected to the outside of the baffle frame 710. A torsion spring 712 is fixed to one end of the baffle plate 711. The mounting plate 702 is equipped with... Two sets of mounting plates 702 are symmetrically distributed about the central axis of the glue box 701. Two sets of gear rings 703 are provided, symmetrically distributed about the central axis of the coating roller 5. The gear rings 703 and the transmission gears 704 are meshed and connected. The inner wall of the guide ring 707 has a guide groove. The outer wall of the transmission rod 705 is attached to the inner wall of the guide groove. The transmission rod 705 and the guide ring 707 are slidably connected. Two sets of swivel rods 708 are provided, symmetrically distributed about the central axis of the half gear 706. Two sets of guide blocks 709 are provided, symmetrically distributed about the central axis of the mounting plate 702. Two sets of spoilers 711 are provided, symmetrically distributed about the spoiler frame 710. One end of the torsion spring 712 is fixedly connected to the spoiler frame 710. The torsion spring 712 is used to rotate the spoiler 711.

[0036] The above scheme is adopted as follows: When the pre-coated film is located on top of the coating roller 5, since the coating roller 5 is located inside the glue box 701, the surface of the coating roller 5 is dipped in glue and applied to the surface of the pre-coated film. At the same time as the drive motor 4 is started to drive the coating roller 5 to rotate, the two sets of toothed rings 703 are driven to rotate simultaneously. The toothed rings 703 drive the transmission gear 704 to rotate, so that the transmission rod 705 follows the rotation of the transmission gear 704 to drive the guide ring 707, half gear 706 and the deflector 708 to swing back and forth. The deflector 708 deflects the glue inside the glue box 701. The half gear 706 meshes with the deflector frame 710 to drive the deflector frame 710 to move back and forth, so that the deflector plate 711 moves with the deflector frame 710. The torsion spring 712 provides a restoring force for the deflector plate 711, so that the angle of the deflector plate 711 changes when it moves and is reset by the torsion spring 712.

[0037] The working principle and usage process of this invention are as follows: In use, the pre-coated film is introduced from the guide frame 2 and sequentially wound around the first tensioning rod 602, the coating roller 5, and the second tensioning rod 603. The adhesive-coated surface of the pre-coated film faces downward and contacts the top of the coating roller 5. The cylinder 604 is activated, and the extended end of the cylinder 604 pushes the support plate 601 to rotate around the central axis of the coating roller 5. When the support plate 601 rotates, it causes the first tensioning rod 602 and the second tensioning rod 603 to swing accordingly. The first tensioning rod 602 slides and is limited along the arc groove on the inner wall of the coating frame 3. The rotation of the support plate 601 increases the wrap angle of the pre-coated film between the coating roller 5, the first tensioning rod 602, and the second tensioning rod 603. The two sets of support plates 601 and cylinder 604 are symmetrically distributed about the central axis of the coating roller 5. The forces applied simultaneously on both sides make the pre-coated film uniformly stressed in the width direction. After being tensioned, the pre-coated film adheres tightly to the surface of the coating roller 5, preventing the pre-coated film from loosening or deviating during operation.

[0038] Start the drive motor 4. The drive end of the drive motor 4 drives the coating roller 5 to rotate. The lower part of the coating roller 5 is immersed in the glue in the glue box 701. When the coating roller 5 rotates, its surface picks up the glue. The glue is carried upwards with the rotation of the coating roller 5 to contact the pre-coated film, thus applying the glue to the surface of the pre-coated film. At the same time, the rotation of the coating roller 5 drives the toothed rings 703 at both ends to rotate synchronously. The toothed rings 703 mesh with the transmission gear 704. The continuous rotation of the toothed rings 703 drives the transmission gear 704 to rotate. When the transmission gear 704 rotates, it drives the transmission rod 705 to perform a circular motion. The end of the transmission rod 705 is inserted into the guide groove on the inner wall of the guide ring 707 and slides along the guide groove. The circular motion of the transmission rod 705 is converted into the reciprocating oscillation of the guide ring 707 through the guide groove. The guide ring 707 is fixedly connected to the half gear 706. The reciprocating oscillation of the guide ring 707 drives the half gear 706 and the turbulence rod 708 to reciprocate synchronously. The turbulence rod 708 swings left and right in the glue box 701 to turbulently flow the glue in the glue box 701, so that the glue flows in the width direction and prevents the solid components in the glue from settling and accumulating at the bottom and corners of the glue box 701.

[0039] When the half gear 706 reciprocates, the toothed section of the half gear 706 always remains engaged with the spoiler frame 710. When the half gear 706 oscillates forward, it drives the spoiler frame 710 to slide to one side along the guide block 709. When the half gear 706 oscillates in the reverse direction, it drives the spoiler frame 710 to slide to the other side along the guide block 709. This achieves the reciprocating movement of the spoiler frame 710 along the axial direction of the glue box 701. When the spoiler frame 710 moves, it drives the spoiler plate 711 to move synchronously. During the movement, the spoiler plate 711 is subjected to the resistance of the glue, resulting in an angle. The deflection changes the contact angle between the baffle 711 and the adhesive, causing the adhesive to be pushed towards the bottom of the coating roller 5 along the deflection direction of the baffle 711. When the baffle frame 710 moves in the opposite direction, the direction of the adhesive resistance on the baffle 711 changes, and the baffle 711 rotates around the hinge point. The torsion spring 712 accumulates elastic force and pushes the baffle 711 back to the initial angle. The baffle 711 repeatedly deflects and resets during the reciprocating movement, axially pushing the adhesive in the adhesive box 701, causing the adhesive to flow back and forth along the axial direction of the coating roller 5.

[0040] The lateral turbulence of the baffle bar 708 and the axial propulsion of the baffle plate 711 occur simultaneously. The flow in both directions forms a cross flow field within the glue box 701. The glue maintains a flowing state in both the width and axial directions. There are no dead zones where glue stagnates within the glue box 701. The solid components in the glue are continuously agitated and suspended, preventing deposition and stratification at the bottom of the glue box 701. The two sets of mounting plates 702, gear rings 703, and transmission gears 704 are symmetrically distributed about the central axis of the glue box 701. The coating roller 5 simultaneously drives two sets of turbulence mechanisms at both ends. The glue on both sides of the inner 01 is simultaneously subjected to lateral turbulence and axial thrust, keeping the glue concentration and temperature uniform throughout the glue box 701. The glue composition on the surface of the coating roller 5 is consistent, and the thickness of the glue layer applied to the pre-coated film is uniform. The rotational power of the coating roller 5 drives the swing of the turbulence rod 708 and the reciprocating movement of the turbulence frame 710 through the transmission link of the toothed ring 703, transmission gear 704, transmission rod 705, guide ring 707 and half gear 706. There is no need to set up a separate drive device for turbulence stirring, reducing the number of power sources and energy consumption of the equipment.

[0041] Two sets of baffles 708 are symmetrically distributed about the central axis of the half gear 706. When the half gear 706 oscillates back and forth, the baffles 708 on both sides oscillate simultaneously. The oscillation range of the baffles 708 covers the area on both sides of the coating roller 5 inside the glue box 701. The oscillation direction of the baffles 708 is perpendicular to the rotation direction of the coating roller 5. When the coating roller 5 rotates, the surface drives the glue to flow in the circumferential direction. The lateral oscillation of the baffles 708 breaks the circumferential flow driven by the rotation of the coating roller 5, so that the glue flows alternately in the circumferential and lateral directions, avoiding the formation of a fixed flow path of glue near the coating roller 5, which would lead to local concentration differences.

[0042] When the transmission rod 705 follows the transmission gear 704 in a circular motion, the position of the transmission rod 705 in the guide groove on the inner wall of the guide ring 707 changes with the rotation angle of the transmission gear 704. When the transmission rod 705 is at the extreme position of the guide groove, the swing angle of the guide ring 707 and the half gear 706 reaches its maximum value, and the lateral swing amplitude of the turbulence rod 708 is the largest. When the transmission rod 705 is at the middle position of the guide groove, the guide ring 707 and the half gear 706 are at the middle position of the swing, and the swing speed of the turbulence rod 708 is the fastest. The sliding of the transmission rod 705 in the guide groove converts the uniform rotational motion of the transmission gear 704 into the non-uniform reciprocating swing of the half gear 706. The speed of the turbulence rod 708 decreases at both ends of the swing and increases in the middle of the swing. The glue is subjected to a large thrust when the turbulence rod 708 accelerates the swing. When the turbulence rod 708 decelerates and changes direction, the glue continues to flow due to inertia, forming an inertial scouring effect, which enhances the stirring effect on the sediment at the bottom of the glue box 701.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-coated film production adhesive circulating coating device, comprising a support frame (1), characterized in that: The top of the support frame (1) is fixed with a guide frame (2), one end of the support frame (1) is fixed with a coating frame (3), the top of the coating frame (3) is fixed with a drive motor (4), the drive end of the drive motor (4) is fixed with a coating roller (5), one end of the coating frame (3) is equipped with a tensioning mechanism (6), and the top of the coating frame (3) is fixed with a coating mechanism (7). The tensioning mechanism (6) includes a support plate (601), a first tensioning rod (602), and a second tensioning rod (603). The support plate (601) is rotatably connected to the outside of the coating roller (5). The first tensioning rod (602) is rotatably connected to one end of the support plate (601), and the second tensioning rod (603) is rotatably connected to one end of the support plate (601). The coating mechanism (7) includes an adhesive box (701), a mounting plate (702), and a toothed ring (703). The adhesive box (701) is fixed to the top of the coating frame (3), the mounting plate (702) is fixed to the bottom inside the adhesive box (701), and the toothed ring (703) is fixed to one end of the coating roller (5).

2. The adhesive circulating coating device for pre-coated film production according to claim 1, characterized in that: One end of the coating rack (3) is rotatably connected to a cylinder (604), and two sets of support plates (601) are provided. The support plates (601) are symmetrically distributed about the central axis of the coating roller (5).

3. The adhesive circulating coating device for pre-coated film production according to claim 1, characterized in that: The inner wall of the coating rack (3) is provided with an arc groove, and the outer wall of the first tensioning rod (602) fits the inner wall of the arc groove. The first tensioning rod (602) and the arc groove are adapted to each other.

4. The adhesive circulating coating device for pre-coated film production according to claim 2, characterized in that: The cylinder (604) is provided in two sets. The cylinder (604) is symmetrically distributed about the central axis of the coating frame (3). The extension end of the cylinder (604) is rotatably connected to the support plate (601).

5. The adhesive circulating coating device for pre-coated film production according to claim 1, characterized in that: One end of the mounting plate (702) is rotatably connected to a transmission gear (704), one end of the transmission gear (704) is fixed to a transmission rod (705), one end of the mounting plate (702) is rotatably connected to a half gear (706), the top end of the half gear (706) is fixed to a guide ring (707), one end of the half gear (706) is fixed to a spoiler rod (708), one end of the mounting plate (702) is fixed to a guide block (709), the inside of the guide block (709) is slidably connected to a spoiler frame (710), the outside of the spoiler frame (710) is rotatably connected to a spoiler plate (711), one end of the spoiler plate (711) is fixed to a torsion spring (712).

6. The adhesive circulating coating device for pre-coated film production according to claim 1, characterized in that: The mounting plate (702) is provided in two sets, and the mounting plate (702) is symmetrically distributed about the central axis of the glue box (701). The toothed ring (703) is provided in two sets, and the toothed ring (703) is symmetrically distributed about the central axis of the coating roller (5).

7. The adhesive circulating coating device for pre-coated film production according to claim 5, characterized in that: The gear ring (703) and the transmission gear (704) are meshed and connected. The inner wall of the guide ring (707) is provided with a guide groove. The outer wall of the transmission rod (705) is attached to the inner wall of the guide groove. The transmission rod (705) and the guide ring (707) are slidably connected.

8. The adhesive circulating coating device for pre-coated film production according to claim 5, characterized in that: Two sets of the spoiler rods (708) are provided, and the spoiler rods (708) are symmetrically distributed about the central axis of the half gear (706).

9. The adhesive circulating coating device for pre-coated film production according to claim 5, characterized in that: Two sets of guide blocks (709) are provided, and the guide blocks (709) are symmetrically distributed about the central axis of the mounting plate (702).

10. The adhesive circulating coating device for pre-coated film production according to claim 5, characterized in that: Two sets of spoilers (711) are provided. The spoilers (711) are symmetrically distributed about the spoiler frame (710). One end of the torsion spring (712) is fixedly connected to the spoiler frame (710). The torsion spring (712) is used to rotate the spoiler (711).

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