A coating device for producing a hot-melt adhesive film

Abstract

The present application relates to the technical field of coating equipment, in particular to a kind of coating device for producing hot melt adhesive film, including support, conveying unit, two coating components and multiple top fans, coating component includes rotary plate and two side following plates, when glue drops on hot melt adhesive film, rotary plate is constantly rotated to adjust angle, to form oblique scraping state, while the rotary plate of two coating components is opposite in direction, to form symmetrical state, when first rotary plate highlights scraping right side colloid, second one highlights scraping left side colloid, finally overall evenly scraping colloid, while in scraping process, side following plate is always telescoped following the rotation of rotary plate, tightly close to the two sides of rotary plate, i.e. the edge of hot melt adhesive film, avoid colloid to drop, thus by the oblique scraping of two rotary plates reverse symmetry, spread back and forth, eliminate the regional accumulation caused by fixed scraper one-way push glue.

Description

Technical Field

[0001] This invention relates to the field of coating equipment technology, and more particularly to a coating apparatus for producing hot melt adhesive films. Background Technology

[0002] In hot melt adhesive film coating production, fixed doctor blades are widely used for coating. The doctor blade is typically a long, strip-shaped blade that spans the entire film surface in the horizontal direction, with the blade edge perpendicular to the film feeding direction. During operation, the doctor blade is fixed to a blade holder and maintained at a forward tilt angle. Molten adhesive is supplied to the front of the doctor blade, and the coating thickness is controlled by the gap between the blade edge and the base film. To improve the uniformity of the horizontal thickness, some existing technologies employ a dual-doctor structure. However, the two doctor blades are still arranged parallel to each other, each installed at a fixed angle, and both remain stationary during operation. Their scraping direction is always consistent with the film feeding direction, which is known as parallel scraping.

[0003] However, in the aforementioned prior art, because the tilt direction of the doctor blade remains fixed, the shearing and pushing direction experienced by the adhesive in front of the blade always points to the same side, resulting in continuous unidirectional migration of the adhesive in the horizontal direction. Specifically, the adhesive continuously accumulates in one area of ​​the doctor blade's front surface, where the fluid dynamic pressure remains consistently high, while the opposite area suffers from insufficient adhesive supply due to the continuous pushing of the adhesive away. This uneven lateral distribution is not an occasional process fluctuation, but a systematic deviation determined by the fixed doctor blade direction, directly causing the coated film to be thicker on one side and thinner on the other in the horizontal direction, severely restricting the improvement of coating uniformity. Summary of the Invention

[0004] The purpose of this invention is to provide a coating apparatus for producing hot melt adhesive films, which solves the problem in the prior art where, because the tilt direction of the doctor blade is fixed, the shearing and pushing direction of the adhesive material in front of the blade always points to the same side, resulting in continuous unidirectional migration of the adhesive material in the horizontal direction.

[0005] To achieve the above objectives, the present invention provides a coating apparatus for producing hot melt adhesive film, comprising a support, a conveying unit, two coating components and multiple top fans, wherein the conveying unit is disposed below the support; Two coating components are sequentially disposed between the conveying unit and the support, and multiple top fans are sequentially disposed on the inner top of the support. A hot melt adhesive film is disposed on the conveying unit. The coating assembly includes a rotating plate and two side-following plates. The rotating plate is rotatably disposed below the support and above the hot melt adhesive film, and the two side-following plates are respectively disposed on both sides of the hot melt adhesive film.

[0006] The conveying unit includes two mounting seats, a drive component, a drive shaft, multiple tension rollers, a take-up shaft, and a take-up component. The two mounting seats are symmetrically arranged below the bracket. The drive component is located on one side of the mounting seat and is fixedly connected to the drive shaft. The drive shaft is rotatably connected to the mounting seat. The multiple tension rollers are sequentially arranged on the mounting seat. The take-up component is located on the mounting seat away from the drive component. The take-up shaft is fixedly connected to the output end of the take-up component. The hot melt adhesive film is sequentially wound around the drive shaft, tension rollers, and take-up shaft.

[0007] The coating assembly further includes a base, two side following mechanisms, two side stabilizing mechanisms, and multiple back swiping units. The base is placed below the hot melt adhesive film, the two side following mechanisms are symmetrically arranged on both sides of the hot melt adhesive film, the two side stabilizing mechanisms are symmetrically arranged below the rotating plate, and the multiple back swiping units are sequentially arranged on one side of the rotating plate.

[0008] The side-following mechanism includes a side-driving component and a pressure sensor. The side-driving component is disposed above the base, and the side-following plate is disposed at the output end of the side-driving component. The pressure sensor is disposed at one end of the side-following plate.

[0009] The side stabilizing mechanism includes a slider and a slide rail. The slide rail is disposed above the base, the slider is slidably connected to the slide rail, and one end of the slider is fixedly connected to the lower part of the rotating plate.

[0010] The back-sliding unit includes a lifting component, an angle adjustment component, an adjustment plate, and a sliding plate. The lifting component is located on one side of the rotating plate, and its output end is fixedly connected to the angle adjustment component. The angle adjustment component has the adjustment plate at its output end, and the sliding plate is located below the adjustment plate.

[0011] The coating device for producing hot melt adhesive film further includes a top feed hopper and multiple mounting blocks, which are sequentially arranged on the inner top of the bracket, and the top feed hopper is arranged on one side of the multiple mounting blocks.

[0012] The top feeding hopper is equipped with multiple feeding mechanisms arranged in an alternating pattern.

[0013] The feeding mechanism includes a feeding pump and a feeding pipe. The feeding pump is located at the bottom of the top feeding hopper, and the output end of the feeding pump is connected to the feeding pipe.

[0014] The coating assembly further includes a rotary drive mechanism, which includes a rotary drive component and a rotating shaft. The rotary drive component is disposed on the inner top of the bracket, and the output end of the rotary drive component is fixedly connected to the rotating shaft. The rotating shaft is fixedly connected to the rotating plate.

[0015] This invention discloses a coating apparatus for producing hot melt adhesive film. The hot melt adhesive film is placed on a conveying unit for transport. During the transport process, adhesive is fed in. When the adhesive drips onto the hot melt adhesive film, the rotating plate continuously rotates and adjusts its angle to form an inclined scraping state. The rotating plates of the two coating components rotate in opposite directions, forming a symmetrical state. The first rotating plate focuses on scraping the adhesive on the right side, while the second focuses on scraping the adhesive on the left side, ultimately scraping the adhesive evenly across the entire surface. During the scraping process, the side following plate always extends and retracts with the rotation of the rotating plate, closely adhering to both sides of the rotating plate, i.e., the edges of the hot melt adhesive film, to prevent the adhesive from falling off. Thus, through the symmetrical inclined scraping of the two rotating plates, the adhesive is spread back and forth in the horizontal direction, eliminating the regional accumulation caused by the unidirectional pushing of adhesive by the fixed scraper, and achieving a uniform distribution of adhesive on the film surface. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the coating apparatus for producing hot melt adhesive film according to the present invention.

[0018] Figure 2 This is a cross-sectional view of the coating apparatus for producing hot melt adhesive film according to the present invention.

[0019] Figure 3 This is a schematic diagram of the coating assembly of the present invention.

[0020] Figure 4 This is a top view of the coating assembly of the present invention.

[0021] Figure 5 This is the invention Figure 3 Enlarged view of the local structure at point A.

[0022] 1-Bracket, 2-Top Fan, 3-Hot Melt Adhesive Film, 4-Rotating Plate, 5-Side Following Plate, 6-Mounting Base, 7-Drive Component, 8-Drive Shaft, 9-Tension Roller, 10-Rewind Shaft, 11-Rewind Component, 12-Base, 13-Side Drive Component, 14-Pressure Sensor, 15-Slider, 16-Slide Rail, 17-Lifting Component, 18-Angle Adjustment Component, 19-Adjusting Plate, 20-Sliding Plate, 21-Top Feeding Bin, 22-Mounting Block, 23-Feed Pump, 24-Feed Pipe, 25-Rotation Drive Component, 26-Rotating Shaft. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] Please see Figures 1 to 5 The present invention provides a coating apparatus for producing hot melt adhesive film, comprising a support 1, a conveying unit, two coating components and multiple top fans 2, wherein the conveying unit is disposed below the support 1; Two coating components are sequentially arranged between the conveying unit and the support 1, and multiple top fans 2 are sequentially arranged on the inner top of the support 1. A hot melt adhesive film 3 is provided on the conveying unit. The coating assembly includes a rotating plate 4 and two side following plates 5. The rotating plate 4 is rotatably disposed below the support 1 and above the hot melt adhesive film 3. The two side following plates 5 are respectively disposed on both sides of the hot melt adhesive film 3.

[0025] In this embodiment, the support 1 provides a rigid mounting base for the entire device; the conveying unit drives the hot melt adhesive film 3 to move continuously and stably along the film-moving direction; the two coating components are arranged sequentially on the film-moving path to coat and spread the adhesive on the surface of the hot melt adhesive film 3; multiple top fans 2 are used to blow air and cool the coated hot melt adhesive film 3 to accelerate the setting of the adhesive; the rotating plate 4 can reciprocate around the vertical axis below the support 1, continuously adjusting the scraping angle to form an inclined scraping state; the two side following plates 5 are respectively located at the... Both sides of the hot melt adhesive film 3 can be closely attached to the edge of the hot melt adhesive film 3 during the scraping process of the rotating plate 4 to prevent the adhesive from falling off the sides of the film surface; the rotating plates 4 of the two coating components rotate in opposite directions to form a symmetrical scraping state, wherein the first rotating plate 4 focuses on scraping the right side of the adhesive, and the second rotating plate 4 focuses on scraping the left side of the adhesive. Through two opposite symmetrical tilting scraping motions, the adhesive is spread back and forth in the horizontal direction, eliminating the regional accumulation caused by the fixed blade pushing the adhesive in one direction, realizing the uniform distribution of the adhesive on the film surface, and significantly improving the horizontal consistency of the coating thickness.

[0026] Furthermore, the conveying unit includes two mounting seats 6, a drive component 7, a drive shaft 8, multiple tension rollers 9, a take-up shaft 10, and a take-up component 11. The two mounting seats 6 are symmetrically arranged below the bracket 1. The drive component 7 is arranged on one side of the mounting seat 6 and is fixedly connected to the drive shaft 8. The drive shaft 8 is rotatably connected to the mounting seat 6. The multiple tension rollers 9 are sequentially arranged on the mounting seat 6. The take-up component 11 is arranged on the mounting seat 6 away from the drive component 7. The take-up shaft 10 is fixedly connected to the output end of the take-up component 11. The hot melt adhesive film 3 is sequentially wound around the drive shaft 8, the tension rollers 9, and the take-up shaft 10.

[0027] In this embodiment, two mounting bases 6 are symmetrically installed on the lower sides of the bracket 1 to provide stable support for each rotating component; the driving component 7 is a servo motor that can drive the driving shaft 8 to rotate, providing active traction for the movement of the hot melt adhesive film 3; multiple tensioning rollers 9 are sequentially arranged on the mounting base 6 to guide and tension the hot melt adhesive film 3, ensuring that the film surface remains flat and wrinkle-free during movement; the winding component 11 is a winding motor that can drive the winding shaft 10 to rotate, winding the hot melt adhesive film 3 after coating; the driving shaft 8, multiple tensioning rollers 9, and the winding shaft 10 together constitute the film path of the hot melt adhesive film 3, realizing continuous production from unwinding, coating to winding.

[0028] Furthermore, the coating assembly also includes a base 12, two side following mechanisms, two side stabilizing mechanisms, and multiple back swiping units. The base 12 is placed below the hot melt adhesive film 3. The two side following mechanisms are symmetrically arranged on both sides of the hot melt adhesive film 3. The two side stabilizing mechanisms are symmetrically arranged below the rotating plate 4. The multiple back swiping units are sequentially arranged on one side of the rotating plate 4.

[0029] In this embodiment, the base 12 is disposed below the hot melt adhesive film 3, providing mounting support for the side following mechanism and the side stabilizing mechanism; the two side following mechanisms are respectively disposed on both sides of the hot melt adhesive film 3, and can drive the corresponding side following plate 5 to perform telescopic movement, so that the side following plate 5 always fits the edge of the hot melt adhesive film 3, adapting to the production needs of film rolls of different widths; the two side stabilizing mechanisms are symmetrically disposed below the rotating plate 4, providing sliding support for the rotation and scraping of the rotating plate 4, ensuring the stability of the rotating plate 4 when rotating; a plurality of back scraping units are sequentially disposed on one side of the rotating plate 4, which can perform secondary combing on the scraped adhesive surface during the scraping process of the rotating plate 4, further improving the coating uniformity.

[0030] Furthermore, the side-following mechanism includes a side-driving component 13 and a pressure sensor 14. The side-driving component 13 is disposed above the base 12. The side-following plate 5 is disposed at the output end of the side-driving component 13, and the pressure sensor 14 is disposed at one end of the side-following plate 5.

[0031] In this embodiment, the side drive component 13 is an electric cylinder or a pneumatic cylinder, which can drive the side following plate 5 to perform lateral telescopic movement; the pressure sensor 14 is located at one end of the side following plate 5 near the edge of the hot melt adhesive film 3, and is used to detect the contact pressure between the side following plate 5 and the edge of the hot melt adhesive film 3 in real time; when the pressure sensor 14 detects an abnormal change in contact pressure, it can feed back a signal to the control system, and the side drive component 13 adaptively adjusts the telescopic position of the side following plate 5 to ensure that the side following plate 5 always remains in contact with the edge of the hot melt adhesive film 3 without damaging the film surface, thereby achieving dynamic following.

[0032] Furthermore, the side stabilizing mechanism includes a slider 15 and a slide rail 16. The slide rail 16 is disposed above the base 12, the slider 15 is slidably connected to the slide rail 16, and one end of the slider 15 is fixedly connected to the lower part of the rotating plate 4.

[0033] In this embodiment, the slide rail 16 is fixedly installed on the upper surface of the base 12 and extends along the rotation trajectory of the rotating plate 4; the slider 15 is slidably disposed on the slide rail 16, and its upper end is fixedly connected to the lower part of the rotating plate 4; when the rotating plate 4 rotates and scrapes, the slider 15 slides synchronously along the slide rail 16 to provide stable bottom sliding support for the rotating plate 4, prevent the rotating plate 4 from shaking or swaying during the scraping process, and ensure the accuracy of the scraping angle and the stability of the scraping process.

[0034] Furthermore, the back-sliding unit includes a lifting component 17, an angle adjustment component 18, an adjustment plate 19, and a sliding plate 20. The lifting component 17 is disposed on one side of the rotating plate 4. The output end of the lifting component 17 is fixedly connected to the angle adjustment component 18. The output end of the angle adjustment component 18 is provided with the adjustment plate 19. The sliding plate 20 is disposed below the adjustment plate 19.

[0035] In this embodiment, the lifting component 17 is an electric cylinder that can drive the angle adjustment component 18 and the slitting plate 20 to move up and down, adjusting the distance between the slitting plate 20 and the surface of the hot melt adhesive film 3; the angle adjustment component 18 is a rotary motor or a manually adjustable turntable that can drive the adjusting plate 19 to rotate, adjusting the slitting angle of the slitting plate 20; the slitting plate 20 is located below the adjusting plate 19, and can perform secondary slitting and combing on the adhesive surface after the rotating plate 4 scrapes, further smoothing out the fine adhesive marks generated during the scraping process of the rotating plate 4, and improving the smoothness of the coating surface.

[0036] Furthermore, the coating apparatus for producing hot melt adhesive film also includes a top feed hopper 21 and a plurality of mounting blocks 22, wherein the plurality of mounting blocks 22 are sequentially arranged on the inner top of the bracket 1, and the top feed hopper 21 is arranged on one side of the plurality of mounting blocks 22.

[0037] In this embodiment, multiple mounting blocks 22 are sequentially fixedly installed on the inner top of the bracket 1 to provide mounting support for the top feeding bin 21. The top feeding bin 21 is a closed storage container used to store molten hot melt adhesive material, and the adhesive material is quantitatively dripped onto the surface of the hot melt adhesive film 3 below through multiple feeding mechanisms inside, so as to achieve uniform feeding.

[0038] Furthermore, multiple feeding mechanisms are staggered on the top feeding bin 21.

[0039] In this embodiment, multiple feeding mechanisms are staggered on the top feeding hopper 21, that is, staggered back and forth along the film-moving direction and staggered left and right along the horizontal direction, so that the adhesive droplets are staggered on the surface of the hot melt adhesive film 3, avoiding the adhesive from adjacent droplets from pooling together, which is beneficial for the subsequent rotating plate 4 to evenly scrape and spread the adhesive, and improve the initial uniformity of coating.

[0040] Furthermore, the feeding mechanism includes a feeding pump 23 and a feeding pipe 24. The feeding pump 23 is located at the bottom of the top feeding hopper 21, and the output end of the feeding pump 23 is connected to the feeding pipe 24.

[0041] In this embodiment, the feed pump 23 is a precision metering pump that can pump out the molten adhesive in the top feed hopper 21 at a set flow rate; one end of the feed pipe 24 is connected to the feed pump 23, and the other end extends above the hot melt adhesive film 3, so as to accurately drip the adhesive onto the surface of the hot melt adhesive film 3; by controlling the pumping flow rate and pumping sequence of each feed pump 23, the feeding amount and feeding position can be precisely controlled to ensure the stability of the coating process.

[0042] Furthermore, the coating assembly also includes a rotary drive mechanism, which includes a rotary drive component 25 and a rotating shaft 26. The rotary drive component 25 is disposed on the inner top of the bracket 1, and the output end of the rotary drive component 25 is fixedly connected to the rotating shaft 26. The rotating shaft 26 is fixedly connected to the rotating plate 4.

[0043] In this embodiment, the rotary drive component 25 is a servo motor that can drive the rotating shaft 26 to perform reciprocating rotational motion. The lower end of the rotating shaft 26 is fixedly connected to the rotating plate 4, transmitting the rotational power of the rotary drive component 25 to the rotating plate 4, causing the rotating plate 4 to reciprocate around the vertical axis, thereby realizing dynamic adjustment of the scraping angle. The rotation directions of the rotary drive components 25 of the two coating components are opposite, so that the two rotating plates 4 form a symmetrical and opposite scraping state.

[0044] When using a coating device for producing hot melt adhesive film according to this embodiment, the operator first starts the equipment through the operation panel, and all components automatically reset to the initial state; the rolled hot melt adhesive film 3 is sequentially wound and installed on the drive shaft 8, the plurality of tensioning rollers 9 and the take-up shaft 10 to complete the film threading operation; When the conveying unit is started, the driving component 7 drives the driving shaft 8 to rotate, causing the hot melt adhesive film 3 to move continuously along the film feeding direction; at the same time, the winding component 11 drives the winding shaft 10 to rotate synchronously, winding up the coated film material; the hot melt adhesive film 3 remains flat and taut when passing through multiple tensioning rollers 9. Multiple feeding mechanisms in the top feeding hopper 21 are started simultaneously, and each feeding pump 23 pumps the molten adhesive to the corresponding feeding pipe 24 according to the set flow rate. The adhesive drips from the outlet of the feeding pipe 24 onto the surface of the hot melt adhesive film 3 traveling below, forming staggered feeding points. When the hot melt adhesive film 3 carrying the adhesive material moves to the bottom of the first coating assembly, the rotary drive component 25 drives the rotating shaft 26 to reciprocate, causing the rotating plate 4 to scrape the adhesive material on the surface of the hot melt adhesive film 3 at an inclined angle; the rotation direction of the rotating plate 4 is positive, focusing on scraping and spreading the adhesive material from the middle to the right; during the scraping process, the two side following mechanisms work synchronously, the side drive component 13 drives the side following plate 5 to extend, so that the side following plate 5 is in close contact with the two side edges of the hot melt adhesive film 3, the pressure sensor 14 detects the contact pressure in real time and provides feedback adjustment to prevent the adhesive material from falling off the edge; at the same time, the slider 15 slides along the slide rail 16 to provide stable bottom support for the rotating plate 4; After being scraped by the first coating component, the hot melt adhesive film 3 carrying the adhesive material continues to move to the bottom of the second coating component; the rotation drive component 25 of the second coating component drives the corresponding rotating plate 4 to rotate back and forth in the opposite direction, and the rotating plate 4 focuses on scraping and spreading the adhesive material from the middle to the left; after two opposite tilting scraping motions, the adhesive material is spread back and forth in the horizontal direction of the hot melt adhesive film 3 to achieve uniform distribution; While the rotating plate 4 is scraping, multiple back swiping units work synchronously. The lifting component 17 drives the swiping plate 20 to descend to a set height close to the adhesive surface. The angle adjustment component 18 drives the adjustment plate 19 to rotate to a set swiping angle. The swiping plate 20 performs secondary combing and swiping on the adhesive surface scraped by the rotating plate 4 to further smooth out minor adhesive marks. The hot melt adhesive film 3, after being coated, continues to move to the inner top of the bracket 1, and multiple top fans 2 are activated to blow air and cool the adhesive surface, so that the adhesive material can be quickly set. The hot melt adhesive film 3, after being shaped, is wound into a roll by the take-up shaft 10, completing the entire coating production process; During the coating process, the rotation angle, rotation frequency and scraping amplitude of the rotating plates 4 of the two coating components can be adjusted in real time according to production needs to adapt to the process requirements of different viscosity adhesives and different coating thicknesses.

[0045] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A coating apparatus for producing hot melt adhesive film, comprising a support and a conveying unit, wherein the conveying unit is disposed below the support, characterized in that, It also includes two coating assemblies and multiple top fans. The two coating assemblies are sequentially arranged between the conveying unit and the bracket, and the multiple top fans are sequentially arranged on the inner top of the bracket. A hot melt adhesive film is provided on the conveying unit. The coating assembly includes a rotating plate and two side-following plates. The rotating plate is rotatably disposed below the support and above the hot melt adhesive film, and the two side-following plates are respectively disposed on both sides of the hot melt adhesive film.

2. The coating apparatus for producing hot melt adhesive film as described in claim 1, characterized in that, The conveying unit includes two mounting bases, a drive component, a drive shaft, multiple tension rollers, a take-up shaft, and a take-up component. The two mounting bases are symmetrically arranged below the bracket. The drive component is located on one side of the mounting base and is fixedly connected to the drive shaft. The drive shaft is rotatably connected to the mounting base. The multiple tension rollers are sequentially arranged on the mounting base. The take-up component is located on the mounting base away from the drive component. The take-up shaft is fixedly connected to the output end of the take-up component. The hot melt adhesive film is sequentially wound around the drive shaft, tension rollers, and take-up shaft.

3. The coating apparatus for producing hot melt adhesive film as described in claim 2, characterized in that, The coating assembly further includes a base, two side following mechanisms, two side stabilizing mechanisms, and multiple back swiping units. The base is placed below the hot melt adhesive film, the two side following mechanisms are symmetrically arranged on both sides of the hot melt adhesive film, the two side stabilizing mechanisms are symmetrically arranged below the rotating plate, and the multiple back swiping units are sequentially arranged on one side of the rotating plate.

4. The coating apparatus for producing hot melt adhesive film as described in claim 3, characterized in that, The side-following mechanism includes a side-driving component and a pressure sensor. The side-driving component is disposed above the base. The side-following plate is disposed at the output end of the side-driving component, and the pressure sensor is disposed at one end of the side-following plate.

5. The coating apparatus for producing hot melt adhesive film as described in claim 4, characterized in that, The side stabilizing mechanism includes a slider and a slide rail. The slide rail is disposed above the base, the slider is slidably connected to the slide rail, and one end of the slider is fixedly connected to the lower part of the rotating plate.

6. The coating apparatus for producing hot melt adhesive film as described in claim 5, characterized in that, The back-sliding unit includes a lifting component, an angle adjustment component, an adjustment plate, and a sliding plate. The lifting component is disposed on one side of the rotating plate. The output end of the lifting component is fixedly connected to the angle adjustment component. The output end of the angle adjustment component is provided with the adjustment plate, and the sliding plate is disposed below the adjustment plate.

7. The coating apparatus for producing hot melt adhesive film as described in claim 6, characterized in that, The coating apparatus for producing hot melt adhesive film further includes a top feed bin and multiple mounting blocks, the multiple mounting blocks being sequentially arranged on the inner top of the bracket, and the top feed bin being arranged on one side of the multiple mounting blocks.

8. The coating apparatus for producing hot melt adhesive film as described in claim 7, characterized in that, Multiple feeding mechanisms are staggered on the top feeding hopper.

9. The coating apparatus for producing hot melt adhesive film as described in claim 8, characterized in that, The feeding mechanism includes a feeding pump and a feeding pipe. The feeding pump is located at the bottom of the top feeding hopper, and the output end of the feeding pump is connected to the feeding pipe.

10. The coating apparatus for producing hot melt adhesive film as described in claim 9, characterized in that, The coating assembly further includes a rotary drive mechanism, which includes a rotary drive component and a rotating shaft. The rotary drive component is disposed on the inner top of the bracket, and the output end of the rotary drive component is fixedly connected to the rotating shaft. The rotating shaft is fixedly connected to the rotating plate.

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