A release film uniform coating device

Abstract

The invention discloses a uniform coating device for release film, comprising a coating support, a feeding mechanism and a discharging mechanism, wherein the two ends of the coating support in the length direction are respectively provided with the feeding mechanism and the discharging mechanism, and the release film is horizontally conveyed from the feeding mechanism to the discharging mechanism, and the coating support is provided with a coating mechanism and a thickness adjustment mechanism in sequence along the conveying direction of the release film, and the thickness adjustment mechanism comprises a sliding outer cylinder, a fixed inner cylinder, a high-precision screw and a scraper roller, the sliding outer cylinder is hollowly arranged and slidably sleeved on the fixed inner cylinder, two groups of mounting plates are symmetrically fixed on the side wall of the fixed inner cylinder, two groups of slide grooves are symmetrically opened on the inner wall of the sliding outer cylinder along its own axis, the mounting plate passes through the slide groove and is fixedly connected with the coating support, the fixed inner cylinder is internally threaded with a high-precision screw, the bottom of the high-precision screw is connected with the scraper roller, and the axial direction of the scraper roller is perpendicular to the conveying direction of the release film. It has a high-precision coating thickness, makes the coating thickness easy to control, and makes the coating more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of release film coating, in particular to a release film uniform coating device. Background Art

[0002] Release film refers to a film with a distinguishable surface. When the release film comes into contact with a specific material under limited conditions, it is non-sticky or slightly sticky. Release film is also called peeling film, isolation film, separation film, adhesive barrier film, release film, film, plastic film, masking film, silicone oil film, silicone oil paper, anti-adhesive film, mold paper, slip film, Tianna paper, release paper, silliconfilm, release film, release, non-woven film.

[0003] Normally, in order to increase the release force of plastic film, the plastic film is plasma treated, fluorine treated, or coated with silicone release agent on the surface of the film material, such as PET, PE, OPP, etc.; so that it can show extremely light and stable release force for various organic pressure-sensitive adhesives (such as hot melt adhesives, acrylic adhesives and rubber-based pressure-sensitive adhesives). According to the different release forces required for the release film and the different viscosities of the isolation product adhesive, the release force is adjusted accordingly to achieve an extremely light and stable release force when peeling. The release film needs to be coated during the production process. Since the coating thickness is very small, the conventional thickness is between 25um and 150um, and the existing coating machine is not easy to control the coating thickness, resulting in uneven coating thickness on the surface of the release film, which directly affects the quality of the resulting product. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a release film uniform coating device with high coating thickness precision, so that the coating thickness is easy to control, the coating is more uniform, and the product quality is improved.

[0005] The objective of the present invention is achieved through the following technical solutions: a release film uniform coating device, comprising a coating bracket, a feeding mechanism and a discharging mechanism, wherein the feeding mechanism and the discharging mechanism are respectively arranged at both ends of the coating bracket in the length direction, and the release film is horizontally conveyed from the feeding mechanism to the discharging mechanism, and the coating bracket is sequentially provided with a gluing mechanism and a thickness adjusting mechanism along the conveying direction of the release film, and a distance sensor is arranged on the coating bracket, and the thickness adjusting mechanism is located between the distance sensor and the gluing mechanism, and the distance measuring light of the distance sensor acts vertically on the release film, and the thickness adjusting mechanism comprises a sliding outer cylinder, a fixed inner cylinder, a high-precision screw and The scraper roller, the fixed inner cylinder is vertically arranged, the sliding outer cylinder is hollow and slidably mounted on the fixed inner cylinder, the side wall of the fixed inner cylinder is symmetrically fixed with two groups of mounting plates, the inner wall of the sliding outer cylinder is symmetrically provided with two groups of sliding grooves along its own axis, the two groups of sliding grooves correspond one to one with the two groups of mounting plates, the mounting plates are fixedly connected to the coating bracket through the sliding grooves, the high-precision screw is connected to the internal thread of the fixed inner cylinder, the bottom of the high-precision screw is connected to the scraper roller, the axial direction of the scraper roller is perpendicular to the conveying direction of the release film, and a low-speed driving mechanism is arranged on the top of the high-precision screw, and the low-speed driving mechanism is used to drive the high-precision screw to rotate.

[0006] The effect of adopting the above technical scheme is that the feeding mechanism unwinds the release film thereon, and the unrolled release film passes through the gluing mechanism and the thickness adjusting mechanism in turn. The glue-coated release film is finally wound on the discharging mechanism, and the release film passes through the gluing mechanism and the thickness adjusting mechanism in a horizontal state, so that the release film is more evenly coated with glue. The driving mechanism drives the high-precision screw to rotate, so that the high-precision screw is screwed in along the spiral direction of the fixed inner cylinder, thereby driving the scraper roller to move through the high-precision screw. The high-precision screw rotates one circle, and the high-precision screw moves one pitch along the spiral direction of the fixed inner cylinder. The moving distance of the high-precision screw is controlled according to the coating thickness, so that the movement accuracy of the scraper roller is higher, and then it adapts to the adjustment of the coating thickness, makes the coating thickness easy to control, makes the coating more uniform, and improves the product quality.

[0007] Furthermore, the low-speed drive mechanism includes a stepper motor, which is mounted on the sliding outer cylinder. A gear is provided on the output shaft of the stepper motor. A rotating cylinder is fixed to the end of the high-precision screw away from the scraper roller. The rotating cylinder is rotatably connected to the sliding outer cylinder. A large gear is provided on the rotating cylinder, and the large gear is meshed with the gear.

[0008] Furthermore, a mounting frame is fixedly connected to the bottom of the high-precision screw, the mounting frame is U-shaped, the U-shaped opening of the mounting frame is set downward, the scraper roller is located in the U-shaped opening of the mounting frame, and the rotating shaft of the scraper roller is rotatably connected to the mounting frame through a bearing.

[0009] Furthermore, a low-speed motor is provided on one side of the mounting frame, and an output shaft of the low-speed motor is transmission-connected to a rotating shaft of the scraper roller via a coupling.

[0010] Furthermore, an arc-shaped baffle is fixed to one end of the mounting frame close to the glue coating mechanism, and the arc-shaped baffle extends downwardly from one end of the mounting frame away from the end of the mounting frame.

[0011] Furthermore, the glue coating mechanism includes a mounting column, a glue coating body and a glue storage barrel. The mounting column is vertically arranged, and the top of the mounting column is slidably arranged on the coating bracket. The mounting column slides along the width direction of the coating bracket. The bottom of the mounting column is fixedly connected to the top of the glue coating body. A glue inlet cavity is arranged in the glue coating body, and a plurality of glue outlet holes are tightly opened at the bottom of the glue coating body. One side of the glue coating body is connected to the glue storage barrel through a glue inlet hose, and a glue inlet pump is arranged on the glue inlet hose.

[0012] Furthermore, side plates are fixed at both ends of the coating body along the conveying direction of the release film, a baffle is arranged between the two side plates, the baffle is slidably connected to the side plates, the baffle slides along the width direction of the coating bracket, a light emitter is arranged on the side of the coating body away from the baffle, and a scale is arranged on the coating body along the width direction.

[0013] Furthermore, two screw seats are fixed at intervals on the inner top of the coating bracket along its width direction, a screw is arranged between the two screw seats, the screw is rotatably connected to the screw seat through a bearing, a slider is fixed on the top of the mounting column, the slider is threadedly connected to the screw, the top of the slider is in contact with the inner top of the coating bracket, a screw motor is installed on the coating bracket, and the output shaft of the screw motor is transmission-connected to one end of the screw.

[0014] Furthermore, the feeding mechanism includes a feeding roller rotatably arranged on the coating bracket, and the discharging mechanism includes a discharging bracket and a discharging roller, the discharging bracket and the coating bracket are spaced apart, the discharging roller is rotatably arranged on the discharging bracket, a drying tunnel furnace is arranged between the discharging bracket and the coating bracket, and the release film passes through the drying tunnel furnace and is wound on the discharging pipe.

[0015] Furthermore, a first horizontal roller is arranged between the gluing mechanism and the feeding mechanism, a second horizontal roller is arranged between the thickness adjustment mechanism and the drying tunnel furnace, the second horizontal roller and the first horizontal roller are both rotatably connected to the coating bracket, the top of the first horizontal roller is flush with the top of the second horizontal roller, a pressure roller is arranged between the first horizontal roller and the feeding mechanism, the pressure roller is slidably connected to the coating bracket, a cylinder is arranged on the coating bracket, the cylinder is vertically arranged, and the telescopic shaft of the cylinder is connected to the pressure roller.

[0016] The beneficial effects of the present invention are:

[0017] 1. The feeding mechanism unwinds the release film on it, and the unrolled release film passes through the gluing mechanism and the thickness adjustment mechanism in turn. The gluing release film is finally wound on the discharging mechanism. The release film passes through the gluing mechanism and the thickness adjustment mechanism in a horizontal state, so that the release film is more evenly coated. The driving mechanism drives the high-precision screw to rotate, so that the high-precision screw is screwed in along the spiral line direction of the fixed inner cylinder, thereby driving the scraper roller to move through the high-precision screw. The high-precision screw rotates one circle, and the high-precision screw moves one pitch along the spiral line direction of the fixed inner cylinder. The moving distance of the high-precision screw is controlled according to the coating thickness, so that the movement accuracy of the scraper roller is higher, and then it adapts to the adjustment of the coating thickness, so that the coating thickness is easy to control, the coating is more uniform, and the product quality is improved.

[0018] 2. The distance sensor is used to detect the distance between the release film before it is coated with glue and the distance sensor. Then, the height of the scraper roller that needs to be adjusted is obtained based on the initial height of the scraper roller and the thickness of the glue to be coated, which further improves the accuracy of the release film coating thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a coating support in a release film uniform coating device of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of a thickness adjustment mechanism in a release film uniform coating device of the present invention;

[0021] Figure 3 It is a right side view of a release film uniform coating device of the present invention;

[0022] Figure 4 It is a schematic diagram of the internal structure of a coating body in a release film uniform coating device of the present invention;

[0023] In the figure, 1-coating bracket, 2-feeding mechanism, 3-discharging mechanism, 4-distance sensor, 5-sliding outer cylinder, 6-fixed inner cylinder, 7-high-precision screw, 8-scraper roller, 9-mounting plate, 10-slideway, 11-stepping motor, 12-gear, 13-large gear, 14-mounting frame, 15-low-speed motor, 16-arc baffle, 17-mounting column, 18-glue coating body, 19-glue storage barrel, 20-glue feed pump, 2 1-glue inlet cavity, 22-glue outlet hole, 23-side plate, 24-baffle, 25-light emitter, 26-scale, 27-screw seat, 28-screw, 29-slider, 30-screw motor, 31-feeding roller, 32-discharging bracket, 33-discharging roller, 34-drying tunnel furnace, 35-first horizontal roller, 36-second horizontal roller, 37-pressure roller, 38-cylinder, 39-rotating cylinder, 40-glue inlet hose. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0025] like Figures 1 to 4 As shown, a release film uniform coating device includes a coating bracket 1, a feeding mechanism 2 and a discharging mechanism 3. The cross-sectional shape of the coating bracket 1 is C-shaped, and the C-shaped opening of the coating bracket 1 is arranged downward. The two ends of the coating bracket 1 in the length direction are respectively provided with the feeding mechanism 2 and the discharging mechanism 3. The release film is horizontally conveyed from the feeding mechanism 2 to the discharging mechanism 3. The coating bracket 1 is sequentially provided with a coating mechanism and a thickness adjustment mechanism along the conveying direction of the release film. A distance sensor 4 is provided on the coating bracket 1. The thickness adjustment mechanism is located between the distance sensor 4 and the coating mechanism. The distance measuring light of the distance sensor 4 acts vertically on the release film. Figure 2As shown, the thickness adjustment mechanism includes a sliding outer cylinder 5, a fixed inner cylinder 6, a high-precision screw 7 and a scraper roller 8. The fixed inner cylinder 6 is vertically arranged, the sliding outer cylinder 5 is hollow and slidably sleeved on the fixed inner cylinder 6, two groups of mounting plates 9 are symmetrically fixed to the side wall of the fixed inner cylinder 6, and the inner wall of the sliding outer cylinder 5 is symmetrically provided with two groups of slide grooves 10 along its own axis. The two groups of slide grooves 10 correspond to the two groups of mounting plates 9 one by one. The mounting plate 9 passes through the slide grooves 10 and is fixedly connected to the coating bracket 1. The fixed inner cylinder 6 is internally threaded with a high-precision screw 7, and the bottom of the high-precision screw 7 is connected to the scraper roller 8. The scraper roller 8 The axial direction is perpendicular to the conveying direction of the release film. A low-speed driving mechanism is arranged on the top of the high-precision screw 7. The low-speed driving mechanism is used to drive the high-precision screw 7 to rotate. The feeding mechanism 2 unwinds the release film on it. The unrolled release film passes through the gluing mechanism and the thickness adjusting mechanism in turn. The glue-coated release film is finally wound on the discharging mechanism 3. The release film passes through the gluing mechanism and the thickness adjusting mechanism in a horizontal state, so that the glue coating of the release film is more uniform. Before coating, the release film is stretched straight and transported in a horizontal state by the feeding mechanism 2 and the discharging mechanism 3. At this time, the release film is not coated first, and the release film is passed through the discharging mechanism 3. The distance sensor 4 detects the height of the upper surface of the release film. Preferably, the bottom height of the scraper roller 8 is consistent with the receiving height of the distance sensor 4, so that the height detected by the distance sensor 4 is equal to the distance between the scraper roller 8 and the release film. Then, the scraper roller 8 can be moved according to the thickness of the glue to be applied. At this time, the moving distance of the scraper roller 8 is equal to the thickness of the glue to be applied, making the adjustment calculation of the scraper roller 8 simpler, faster and more accurate. Then, the glue coating mechanism works to spray the paint on the upper surface of the release film. After the paint is applied, the release film will pass through the scraper roller 8, and the paint on the release film will be coated by the scraper roller 8. Evenly scrape off the excess paint; the specific adjustment process of the scraper roller 8 is that the driving mechanism drives the high-precision screw 7 to rotate, so that the high-precision screw 7 is screwed in along the spiral direction of the fixed inner cylinder 6, thereby driving the scraper roller 8 to move through the high-precision screw 7, the high-precision screw 7 rotates one circle, and the high-precision screw 7 moves one pitch along the spiral direction of the fixed inner cylinder 6, and the moving distance of the high-precision screw 7 is controlled according to the coating thickness, so that the movement accuracy of the scraper roller is higher, and then it adapts to the adjustment of the coating thickness, makes the coating thickness easy to control, makes the coating more uniform, and improves the product quality.

[0026] Furthermore, the low-speed driving mechanism includes a stepper motor 11, which is mounted on the sliding outer cylinder 5. A gear 12 is provided on the output shaft of the stepper motor 11. A rotating cylinder 39 is fixed to the end of the high-precision screw 7 away from the scraper roller 8. The rotating cylinder 39 is rotatably connected with the sliding outer cylinder 5. A large gear 13 is provided on the rotating cylinder 39, and the large gear 13 meshes with the gear 12. The stepper motor 11 drives the rotating cylinder 39 to rotate through the meshing of the large gear 13 and the gear 12. The rotating cylinder 39 drives the high-precision screw 7 to rotate, thereby causing the high-precision screw 7 to move along its own spiral line direction. During the movement, the high-precision screw 7 will drive the rotating cylinder 39 to move. Since the rotating cylinder 39 is rotatably connected with the sliding outer cylinder 5, the sliding outer cylinder 5 can make a translational movement without affecting the rotation of the rotating cylinder 39, thereby driving it The stepper motor 11 on the device moves with the movement of the high-precision screw 7, so that the large gear 13 and the gear 12 always maintain a meshing state; the stepper motor 11 is used to facilitate the deflection and movement angle of the high-precision screw 7. The high-precision screw 7 is used to make the single movement distance of the scraper roller 8 more subtle. For example, the pitch of the high-precision screw 7 can be 10um or an integer multiple of 10, which is convenient for angle calculation. For example, the pitch of the high-precision screw 7 is 20um, and when the glue coating thickness is required to be 65um, the stepper motor 11 drives the high-precision screw to rotate three circles. At this time, the distance between the scraper roller 8 and the release film is 60um. Since the stepper motor 11 can adjust the deflection angle, the stepper motor 11 drives the high-precision screw 7 to rotate 90°, so that the scraper roller 8 moves another 5um, thereby completing the precise control of the coating thickness.

[0027] Furthermore, if Figure 2 As shown, a mounting frame 14 is fixedly connected to the bottom of the high-precision screw 7. The mounting frame 14 is U-shaped, and the U-shaped opening of the mounting frame 14 is arranged downward. The scraper roller 8 is located in the U-shaped opening of the mounting frame 14. The rotating shaft of the scraper roller 8 is rotatably connected to the mounting frame 14 through a bearing. A low-speed motor 15 is arranged on one side of the mounting frame 14. The output shaft of the low-speed motor 15 is transmission-connected to the rotating shaft of the scraper roller 8 through a coupling. An arc-shaped baffle plate 16 is fixed to one end of the mounting frame 14 close to the gluing mechanism, and the arc-shaped baffle plate 16 extends downward away from the end of the mounting frame 14; the scraper roller 8 is driven to rotate slowly by the low-speed motor 15 to achieve a better scraping effect, and the rotation direction of the scraper roller 8 is opposite to the conveying direction of the release film, so that the excess paint is scraped off in the direction of the feeding mechanism 2, thereby avoiding affecting the release film at the rear, and the arc-shaped baffle plate 16 has a material blocking effect to avoid splashing of the scraped paint; in specific implementation, a collecting cylinder is arranged below the release film to allow the excess paint to fall into the collecting cylinder.

[0028] Furthermore, if Figure 3 and Figure 4As shown, the glue coating mechanism includes a mounting column 17, a glue coating body 18 and a glue storage barrel 19. The mounting column 17 is vertically arranged, and the top of the mounting column 17 is slidably arranged on the coating bracket 1. The mounting column 17 slides along the width direction of the coating bracket 1. The bottom of the mounting column 17 is fixedly connected to the top of the glue coating body 18. A glue feeding cavity 21 is arranged in the glue coating body 18. A plurality of glue outlet holes 22 are tightly opened at the bottom of the glue coating body 18. One side of the glue coating body 18 is connected to the glue storage barrel 19 through a glue feeding hose 40. A glue feeding pump 20 is arranged on the glue feeding hose 40. The coating in the glue storage barrel 19 is pumped into the glue feeding cavity 21 through the glue feeding pump 20, and finally sprayed on the release film from the glue outlet holes 22. The mounting column 17 drives the glue coating body 18 to move along the width direction of the release film. The position of the glue coating body 18 is adjusted according to the width of the release film so that the glue coating body 18 can completely cover the width of the release film for coating; Side plates 23 are fixed at both ends of the glue body 18 along the conveying direction of the release film, and a baffle 24 is arranged between the two side plates 23. The baffle 24 is slidably connected to the side plates 23, and the baffle 24 slides along the width direction of the coating bracket 1. A light emitter 25 is arranged on the side of the glue-coating body 18 away from the baffle 24, and a scale 26 is arranged on the glue-coating body 18 along the width direction. The glue output width of the glue-coating body 18 is controlled by the baffle 24, so that the glue output width of the glue-coating body 18 is equal to the width of the release film. The light emitter 25 is turned on first, and one end of the glue-coating body 18 is made to correspond to one end of the release film in the width direction through the light emitter 25, and then the position of the baffle 24 is adjusted according to the size of the release film, and the length of the glue-coating body 18 that needs to be blocked is obtained through the scale 26, so that the length of the glue-coating body 18 can meet more release film coating, and at the same time, it also avoids waste caused by the glue output width being greater than the width of the release film.

[0029] Furthermore, two screw seats 27 are fixed at intervals on the inner top of the coating bracket 1 along its own width direction, and a screw 28 is arranged between the two screw seats 27. The screw 28 is rotatably connected to the screw seat 27 through a bearing. A slider 29 is fixed to the top of the mounting column 17. The slider 29 is threadedly connected to the screw 28. The top of the slider 29 contacts the inner top of the coating bracket 1. A screw motor 30 is installed on the coating bracket 1. The output shaft of the screw motor 30 is transmission-connected to one end of the screw 28. The screw motor 30 drives the screw 28 to rotate. Since the slider 29 is slidably adapted to the coating bracket 1, the rotational freedom of the slider 29 is limited, so that the slider 29 moves along the axial direction of the screw 28, thereby driving the coating body 18 to move through the mounting column 17 to adjust the coating position.

[0030] Furthermore, the feeding mechanism 2 includes a feeding roller 31 rotatably arranged on the coating bracket 1, and the discharging mechanism 3 includes a discharging bracket 32 ​​and a discharging roller 33. The discharging bracket 32 ​​is spaced apart from the coating bracket 1, and the discharging roller 33 is rotatably arranged on the discharging bracket 32. A drying tunnel furnace 34 is arranged between the discharging bracket 32 ​​and the coating bracket 1. The release film passes through the drying tunnel furnace 34 and is wound on the discharging pipe 33. The release film treated with glue first passes through the drying tunnel furnace 34 and then is wound on the discharging roller 33. The coating on the release film is dried by the drying tunnel furnace 34; a first horizontal roller 35 is arranged between the gluing mechanism and the feeding mechanism 2, and a thickness adjustment mechanism is arranged between the drying tunnel furnace 3 A second horizontal roller 36 is arranged between the first horizontal roller 35 and the coating bracket 1, and the second horizontal roller 36 and the first horizontal roller 35 are both rotatably connected to the coating bracket 1. The top of the first horizontal roller 35 is flush with the top of the second horizontal roller 36. A pressing roller 37 is arranged between the first horizontal roller 35 and the feeding mechanism 2, and the pressing roller 37 is slidably connected to the coating bracket 1. A cylinder 38 is arranged on the coating bracket 1, and the cylinder 38 is vertically arranged. The telescopic shaft of the cylinder 38 is connected to the pressing roller 37. The release film is horizontally passed through the gluing mechanism and the thickness adjustment mechanism by the first horizontal roller 35 and the second horizontal roller 36, and the release film is squeezed by the pressing roller 37 to make the release film straight, thereby ensuring uniform glue coating.

[0031] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; and it is known to those skilled in the art that the beneficial effects to be achieved by the present invention are only to achieve better beneficial effects under specific circumstances compared with the current implementation schemes in the prior art, rather than to directly achieve the best use effect in the industry.

[0032] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A release film uniform coating device, comprising a coating support (1), a feeding mechanism (2) and a discharging mechanism (3), wherein the feeding mechanism (2) and the discharging mechanism (3) are respectively arranged at two ends of the coating support (1) in the length direction, and characterized in that: The release film is conveyed in a horizontal state by the feeding mechanism (2) to the discharging mechanism (3); the coating bracket (1) is provided with a coating mechanism and a thickness adjustment mechanism in sequence along the conveying direction of the release film; a distance sensor (4) is provided on the coating bracket (1); the thickness adjustment mechanism is located between the distance sensor (4) and the coating mechanism; the distance measuring light of the distance sensor (4) acts vertically on the release film; the thickness adjustment mechanism comprises a sliding outer cylinder (5), a fixed inner cylinder (6), a high-precision screw (7) and a scraping roller (8); the fixed inner cylinder (6) is vertically arranged; the sliding outer cylinder (5) is hollow and slidably sleeved on the inner cylinder (6); On the fixed inner cylinder (6), two groups of mounting plates (9) are symmetrically fixed on the side wall of the fixed inner cylinder (6), and the inner wall of the sliding outer cylinder (5) is symmetrically provided with two groups of slide grooves (10) along its own axis, and the two groups of slide grooves (10) correspond to the two groups of mounting plates (9) one by one, and the mounting plates (9) pass through the slide grooves (10) and are fixedly connected to the coating bracket (1), and the fixed inner cylinder (6) is internally threadedly connected with the high-precision screw (7), and the bottom of the high-precision screw (7) is connected to the scraper roller (8), and the axial direction of the scraper roller (8) is perpendicular to the conveying direction of the release film, and the top of the high-precision screw (7) is provided with a low-speed drive The low-speed driving mechanism is used to drive the high-precision screw (7) to rotate; the low-speed driving mechanism includes a stepping motor (11), the stepping motor (11) is mounted on the sliding outer cylinder (5), a gear (12) is arranged on the output shaft of the stepping motor (11), a rotating cylinder (39) is fixed to the end of the high-precision screw (7) away from the scraper roller (8), the rotating cylinder (39) is rotationally connected to the sliding outer cylinder (5), a large gear (13) is arranged on the rotating cylinder (39), and the large gear (13) is meshed with the gear (12); the glue coating mechanism includes a mounting column (17), a glue coating body (1 8) and a glue storage barrel (19), the mounting column (17) being vertically arranged, the top of the mounting column (17) being slidably arranged on the coating bracket (1), the mounting column (17) sliding along the width direction of the coating bracket (1), the bottom of the mounting column (17) being fixedly connected to the top of the coating body (18), the coating body (18) being provided with a glue inlet cavity (21), the bottom of the coating body (18) being closely provided with a plurality of glue outlet holes (22), one side of the coating body (18) being connected to the glue storage barrel (19) via a glue inlet hose (40), and the glue inlet hose (40) being provided with a glue inlet pump (20);Side plates (23) are fixed to both ends of the coating body (18) along the conveying direction of the release film, a baffle (24) is arranged between the two side plates (23), the baffle (24) is slidably connected to the side plates (23), the baffle (24) slides along the width direction of the coating bracket (1), a light emitter (25) is arranged on the side of the coating body (18) away from the baffle (24), and a scale (26) is arranged along the width direction of the coating body (18). ; 2. The release film uniform coating device according to claim 1, characterized in that: A mounting frame (14) is fixedly connected to the bottom of the high-precision screw (7); the mounting frame (14) is U-shaped, with the U-shaped opening of the mounting frame (14) facing downward; the scraper roller (8) is located in the U-shaped opening of the mounting frame (14); and the rotating shaft of the scraper roller (8) is rotatably connected to the mounting frame (14) via a bearing.

3. The release film uniform coating device according to claim 2, characterized in that: A low-speed motor (15) is provided on one side of the mounting frame (14), and an output shaft of the low-speed motor (15) is drivingly connected to a rotating shaft of the scraper roller (8) via a coupling.

4. The release film uniform coating device according to claim 3, characterized in that: An arc-shaped baffle plate (16) is fixed to one end of the mounting frame (14) close to the glue coating mechanism, and one end of the arc-shaped baffle plate (16) away from the mounting frame (14) extends downward.

5. The release film uniform coating device according to claim 1, characterized in that: Two screw seats (27) are fixed at intervals on the inner top of the coating bracket (1) along its width direction, a screw (28) is arranged between the two screw seats (27), and the screw (28) is rotatably connected to the screw seat (27) via a bearing, a slider (29) is fixed on the top of the mounting column (17), the slider (29) is threadedly connected to the screw (28), the top of the slider (29) is in contact with the inner top of the coating bracket (1), and a screw motor (30) is installed on the coating bracket (1), and the output shaft of the screw motor (30) is drivingly connected to one end of the screw (28).

6. The release film uniform coating device according to claim 1, characterized in that: The feeding mechanism (2) comprises a feeding roller (31) rotatably arranged on the coating bracket (1); the discharging mechanism (3) comprises a discharging bracket (32) and a discharging roller (33); the discharging bracket (32) is spaced apart from the coating bracket (1); the discharging roller (33) is rotatably arranged on the discharging bracket (32); a drying tunnel furnace (34) is arranged between the discharging bracket (32) and the coating bracket (1); and the release film passes through the drying tunnel furnace (34) and is wound on the discharging roller (33).

7. A release film uniform coating device according to claim 6, characterized in that: A first horizontal roller (35) is arranged between the gluing mechanism and the feeding mechanism (2), a second horizontal roller (36) is arranged between the thickness adjustment mechanism and the drying tunnel furnace (34), the second horizontal roller (36) and the first horizontal roller (35) are both rotatably connected to the coating bracket (1), the top of the first horizontal roller (35) is flush with the top of the second horizontal roller (36), a pressing roller (37) is arranged between the first horizontal roller (35) and the feeding mechanism (2), the pressing roller (37) is slidably connected to the coating bracket (1), and a cylinder (38) is arranged on the coating bracket (1), the cylinder (38) is arranged vertically, and the telescopic shaft of the cylinder (38) is connected to the pressing roller (37).

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