A glue scraping adjusting device of a not-dry hot melt glue coating machine

Abstract

The application discloses a glue scraping adjusting device of a hot melt adhesive coating machine, and relates to the technical field of coating machines.The coating machine frame is provided with a first roll material for outputting a to-be-coated roll film one at one end and a second roll material for outputting a roll film two at the other end, the roll film two is used for engaging with the roll film one to form a composite film, and a winding material for winding the composite film is further arranged on the coating machine frame.The first adhesive roller and the second adhesive roller are symmetrically arranged on the coating machine frame and rotate, the roll film one is adhered to the roll film two which passes through the second adhesive roller to form the composite film after passing through the first adhesive roller.The first adhesive roller is provided with a glue roller.The glue on the glue roller is scraped by a scraper to be flat, so that the upper surface of the roll film one is coated by the glue roller before passing through the first adhesive roller, and is adhered to the roll film two which passes through the second adhesive roller subsequently.The gathered glue is collected by a liquid guide mechanism during the glue scraping process.

Description

Technical Field

[0001] This invention relates to the field of coating machine technology, specifically to a scraper adjustment device for a self-adhesive hot melt adhesive coating machine. Background Technology

[0002] In the production of self-adhesive products (such as labels, tapes, and advertising stickers), a hot melt adhesive coating machine is typically used to evenly coat the substrate surface with molten hot melt adhesive. The coating quality directly affects the adhesion performance and appearance quality of the product, and the scraping process of the coating roller is one of the key steps that determines the uniformity of the coating.

[0003] Currently, most mainstream self-adhesive hot melt adhesive coating machines employ a doctor blade coating structure. Its working principle is as follows: the adhesive is supplied to the surface of a rotating coating roller via a glue supply system. A doctor blade is fixedly installed on one side of the coating roller, maintaining a certain gap between the blade and the roller surface. The doctor blade scrapes away excess adhesive from the roller surface, leaving only a uniform adhesive layer. This layer is then transferred to the substrate to complete the coating process. This structure allows for adjustment of the adhesive application rate by controlling the gap between the doctor blade and the coating roller.

[0004] However, the above-mentioned blade coating structure still has the following shortcomings in actual production: During the coating process, excess adhesive scraped off the coating roller by the scraper flows along the blade direction and gradually accumulates at both ends of the scraper. Under gravity, this accumulated adhesive drips from both ends of the scraper onto the frame or transmission components below. As production time increases, the amount of adhesive dripping also increases, resulting in adhesive waste and contamination of equipment components. More importantly, if the dripping adhesive is not cleaned up promptly, it will gradually solidify and accumulate, affecting the precision of the scraper mounting and the operational stability of the coating roller. It may even clog equipment gaps, increasing equipment failure rates and maintenance difficulty.

[0005] Currently, to address the aforementioned glue dripping issue, production sites primarily rely on operators periodically inspecting and manually cleaning the glue residue and accumulated residue from both ends of the scraper. This manual cleaning method not only increases the workload for operators but also makes it difficult to precisely control the timing of cleaning. If cleaning is not done in a timely manner, it may lead to equipment malfunctions or product quality defects. Summary of the Invention

[0006] The purpose of this invention is to provide a scraper adjustment device for a self-adhesive hot melt adhesive coating machine, so as to solve the problem of frequent manual cleaning of the scraper dripping adhesive in the prior art.

[0007] The technical problem to be solved by the present invention can be achieved by the following technical solution: a scraper adjustment device for a self-adhesive hot melt adhesive coating machine, including a coating machine frame, one end of the coating machine frame is provided with a first roll of material for outputting a roll of film to be coated, and the other end is provided with a second roll of material for outputting a second roll of film, the second roll of film being used to engage with the first roll of film to form a composite film, and the coating machine frame is also provided with a take-up material for winding the composite film; The coating machine frame is symmetrically arranged with a first bonding roller and a second bonding roller. After the first film roll passes over the first bonding roller, it is bonded to the second film roll that passes over the second bonding roller to form a composite film. The first bonding roller is provided with a coating roller, and the coating roller is provided with a glue feeding module for discharging the self-adhesive hot melt adhesive onto the coating roller. A scraper is provided on one side of the coating roller for scraping the adhesive on the coating roller evenly. The scraper is also equipped with a liquid guiding mechanism, which is used to promptly drain the adhesive that has accumulated on the scraper.

[0008] Preferably, the glue dispensing module includes a glue storage tank fixed on the frame of the coating machine, a first heater is provided on one side of the glue storage tank, a glue discharge tank is provided at the bottom of the glue storage tank, and a glue discharge port is opened at the bottom of the glue discharge tank; The glue discharge roller is rotatably arranged inside the box at the glue discharge port. The outer side of the glue discharge roller is connected to the glue application roller through a belt pulley structure. The outer wall of the glue discharge roller is in contact with the inner wall of the glue discharge box, and a glue discharge groove is opened on the wall of the glue discharge roller.

[0009] Preferably, baffles are fixedly arranged on both sides of the scraper, and the baffles slide and fit against the two sides of the coating roller.

[0010] Preferably, a collection box is provided on the side of the scraper away from the coating roller, and a collection port is provided on the collection box.

[0011] Preferably, the collection box is further provided with heating boxes at both ends, and a second heater is provided on one side of the heating box; It also includes a drainage mechanism, which is used to guide the adhesive liquid in the collection box into the heating box.

[0012] Preferably, the collection box has through grooves at both ends for discharging adhesive liquid, and partitions are slidably embedded in the through grooves on both sides; The collection box is equipped with a sliding guide plate, and the coating machine frame is fixedly equipped with a translation mechanism, the drive end of which is fixedly connected to the guide plate.

[0013] Preferably, protruding plates are fixedly arranged on both sides of the top of the guide plate.

[0014] Preferably, a first guide shaft is fixedly arranged on one side of the baffle, a first guide seat fixedly connected to the partition is slidably sleeved on the first guide shaft, and a first spring is provided on the first guide shaft.

[0015] Preferably, the heating box has a material guide port, a cover plate is slidably mounted on the material guide port, an L-shaped bracket is fixedly mounted on one side of the heating box, a second guide shaft is slidably inserted on the L-shaped bracket and fixedly connected to the cover plate, and a second spring is mounted on the second guide shaft.

[0016] Preferably, a glue pump is provided on one side of the heating box, and the other end of the glue pump is connected to the glue storage tank through a glue delivery pipe.

[0017] Compared with the prior art, the beneficial effects of this application are as follows: 1. During operation, the coating machine of the present invention first discharges the adhesive liquid onto the coating roller through the adhesive feeding module. In order to avoid unevenness of the self-adhesive hot melt adhesive discharged onto the coating roller, the adhesive liquid on the coating roller can be scraped flat by a scraper, so that the upper surface of the first roll of film is coated with adhesive by the coating roller before passing through the first bonding roller, so as to be bonded to the second roll of film that subsequently passes through the second bonding roller. During the scraping process, the scraper can collect the accumulated adhesive liquid through the liquid guiding mechanism.

[0018] 2. In the actual scraping process, as the adhesive accumulates on the scraper, this embodiment can guide the adhesive to the output and collect it through the set liquid guiding mechanism. On the one hand, it can prevent the adhesive from dripping onto the equipment, and on the other hand, it can recycle the collected adhesive.

[0019] 3. In this invention, after the adhesive flows to the collection box, the adhesive in the collection box can be transported to the heating box through the drainage mechanism. The adhesive can be heated and kept warm by the second heater so that the adhesive can always maintain the corresponding fluidity for subsequent recycling.

[0020] 4. In the initial state, the guide plate is located on one side of the collection box. When it is necessary to introduce the adhesive in the collection box into one side of the heating box, the guide plate can be pushed to slide in the collection box by the translation mechanism to scrape the adhesive with poor flowability in the collection box toward one side of the collection box. Since the partition is slidably arranged at both ends of the collection box, when the adhesive flows toward the heating box, it can drive the partition to shift to one side.

[0021] 5. In the initial state, the cover plate is in a closed state of the guide port. When the guide plate pushes the partition to slide, the partition simultaneously pushes the cover plate to move on the heating box to open the guide port, so that the guide gap is connected with the guide port, and then the adhesive is discharged into the heating box. During this process, the cover plate can push the second guide shaft to slide on the L-shaped bracket to compress the second spring and generate elastic force, so as to drive the cover plate to reset in the future. Based on this, the present invention can achieve the effect of automatically adjusting the opening and closing of the guide port, so as to improve the heat preservation effect of the heating box and prevent heat loss along the guide port. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the adhesive scraper adjustment device of a self-adhesive hot melt adhesive coating machine according to the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of the adhesive scraper adjustment device of a self-adhesive hot melt adhesive coating machine according to the present invention. Figure 2 ; Figure 3 This is a top view schematic diagram of the adhesive scraper adjustment device of a self-adhesive hot melt adhesive coating machine according to the present invention. Figure 4 This is a side view of the adhesive scraper adjustment device of a self-adhesive hot melt adhesive coating machine according to the present invention. Figure 5 This is a cross-sectional schematic diagram of the adhesive scraper adjustment device of a self-adhesive hot melt adhesive coating machine according to the present invention. Figure 6 This is a schematic diagram of the adhesive roller in the adhesive scraping adjustment device of a self-adhesive hot melt adhesive coating machine according to the present invention. Figure 7 This is a schematic diagram of the adhesive storage tank in the adhesive scraping adjustment device of a self-adhesive hot melt adhesive coating machine according to the present invention. Figure 8 This is a schematic diagram of the heating box in the scraper adjustment device of a self-adhesive hot melt adhesive coating machine according to the present invention. Figure 9 This is a schematic diagram of the partition plate in the scraper adjustment device of a self-adhesive hot melt adhesive coating machine according to the present invention.

[0023] Explanation of reference numerals in the attached figures: 1. Coating machine frame; 2. First roll of material; 3. Second roll of material; 4. Glue storage tank; 5. Glue coating roller; 6. Translation mechanism; 7. Doctor blade; 8. Heating box; 101. First bonding roller; 102. Second bonding roller; 201. Film roll one; 301. Take-up material; 302. Second roll film; 303. Composite film; 401. First heater; 402. Discharge box; 403. Discharge roller; 404. Discharge trough; 501. Pulley structure; 502. Discharge pipe; 601. Discharge pump; 602. Second heater; 701. Baffle; 702. Collection box; 703. Partition; 704. First guide seat; 705. First spring; 706. First guide shaft; 707. Guide plate; 708. Convex plate; 802. Cover plate; 803. L-shaped bracket; 804. Second guide shaft; 805. Second spring; 806. Discharge port. Detailed Implementation

[0024] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0025] Example 1 The excess adhesive scraped off the surface of the coating roller by the scraper will flow along the direction of the scraper blade and gradually accumulate at both ends of the scraper. Under the action of gravity, the accumulated adhesive will drip from both ends of the scraper onto the frame or transmission components below.

[0026] like Figures 1 to 5 In this embodiment, a scraper adjustment device for a self-adhesive hot melt adhesive coating machine includes a coating machine frame 1. One end of the coating machine frame 1 is provided with a first roll 2 for outputting a roll of film 201 to be coated, and the other end is provided with a second roll 3 for outputting a roll of film 302. The second roll 302 is used to engage with the first roll 201 to form a composite film 303. The coating machine frame 1 is also provided with a take-up material 301 for winding up the composite film 303. Specifically, when the coating machine of this embodiment is used, the first roll 201 to be coated is output through the first roll 2. After the surface of the first roll 201 is coated with adhesive, it is then bonded with the second roll 302 output through the second roll 3 to form a composite film 303. Finally, the composite film 303 is wound up to form a take-up material 301.

[0027] In this embodiment, a first adhesive roller 101 and a second adhesive roller 102 are symmetrically arranged on the frame 1 of the coating machine. After the first roll of film 201 passes over the first adhesive roller 101, it is bonded to the second roll of film 302 that passes over the second adhesive roller 102 to form a composite film 303. Specifically, the output first roll of film 201 passes through the first adhesive roller 101, and at the same time, the output second roll of film 302 passes through the second adhesive roller 102. Under the pressure of the first adhesive roller 101 and the second adhesive roller 102, the first roll of film 201 and the second roll of film 302 can be bonded together.

[0028] Please refer to Figures 5-9 As one embodiment of this embodiment, the first bonding roller 101 is provided with a coating roller 5, and the coating roller 5 is provided with a glue feeding module for discharging the self-adhesive hot melt adhesive onto the coating roller 5. A scraper 7 is provided on one side of the coating roller 5 for scraping the adhesive liquid on the coating roller 5 evenly. Specifically, in this embodiment, during coating, the adhesive liquid is discharged onto the coating roller 5 through the glue feeding module. During the process of conveying the roll film 201 along the first bonding roller 101, its upper surface contacts the coating roller 5. After the scraper 7 scrapes the adhesive liquid on the coating roller 5 evenly, the coating roller 5 applies adhesive to the roll film 201.

[0029] As a further embodiment, the scraper 7 is also provided with a liquid guiding mechanism, which is used to discharge the adhesive liquid accumulated on the scraper 7 in a timely manner. The working principle of this embodiment: During the operation of the coating machine in this embodiment, the adhesive is first discharged onto the coating roller 5 through the adhesive feeding module. In order to avoid the hot melt adhesive on the coating roller 5 being uneven, the adhesive on the coating roller 5 can be scraped flat by the scraper 7, so that the upper surface of the roll film 201 is coated with adhesive by the coating roller 5 before passing through the first bonding roller 101, so as to be bonded to the roll film 302 that subsequently passes through the second bonding roller 102. In order to prevent the accumulated adhesive from dripping indiscriminately during the scraping process, this embodiment can collect the accumulated adhesive through the liquid guiding mechanism. It should be emphasized that the core improvement of this embodiment is that: during the actual scraping process, as the adhesive accumulates on the scraper 7, this embodiment can guide the adhesive to the output and collect it through the set liquid guiding mechanism. On the one hand, this can prevent the adhesive from dripping onto the equipment, and on the other hand, the collected adhesive can be recycled.

[0030] It should be noted that, such as Figures 5-7The glue conveying module includes a glue storage tank 4 fixed on the coating machine frame 1. A first heater 401 is provided on one side of the glue storage tank 4. A glue discharge tank 402 is provided at the bottom of the glue storage tank 4. A glue discharge port is opened at the bottom of the glue discharge tank 402. A glue discharge roller 403 is rotatably arranged inside the tank at the glue discharge port. The outer side of the glue discharge roller 403 is connected to the glue coating roller 5 through a belt pulley structure 501. The outer wall of the glue discharge roller 403 is in contact with the inner wall of the glue discharge tank 402. A glue discharge groove 404 is opened on the wall of the glue discharge roller 403. It can be noted that during the conveying process of the roll film 201 in this embodiment, the film is conveyed by the glue discharge tank 402. The film roll 201 is in close contact with the coating roller 5, so that the film roll 201 can synchronously drive the coating roller 5 to rotate during the transmission process. During the rotation of the coating roller 5, the discharge roller 403 can be synchronously driven to rotate through the belt pulley structure 501. When the discharge trough 404 rotates into the discharge box 402, the glue can fall into the discharge trough 404 under the action of gravity. As the discharge roller 403 continues to rotate, when the discharge trough 404 rotates downward, the glue can be discharged onto the coating roller 5. Based on this, this embodiment uses the discharge trough 404 to transport the glue, so as to achieve the effect of quantitative and uniform transportation.

[0031] It should be noted that, such as Figures 6-9 To prevent the adhesive accumulated on the scraper 7 from dripping freely from both ends, baffles 701 are fixedly arranged on both sides of the scraper 7 in this embodiment. The baffles 701 on both sides slide against the sides of the coating roller 5. It can be explained that by setting baffles 701 on both sides of the scraper 7 in this embodiment, the adhesive accumulated on the scraper 7 can be blocked, preventing the adhesive from flowing along both ends of the scraper 7.

[0032] like Figures 7 to 9 In this embodiment, when a certain amount of adhesive accumulates on one side of the scraper 7, in order to prevent the adhesive from spreading and flowing, a collection box 702 is provided on the side of the scraper 7 away from the coating roller 5, and a collection port is provided on the collection box 702; specifically, through the collection box 702, the adhesive accumulated on the scraper 7 can enter the collection box 702 along the collection port for temporary storage.

[0033] Example 2 It is understandable that in Embodiment 1, the adhesive that accumulates on the scraper 7 can be temporarily stored in the collection box 702 through the collection port. However, once the adhesive flows into the collection box 702, its fluidity is greatly reduced, making it difficult to recycle directly.

[0034] like Figures 5 to 9To solve the above problems, heating boxes 8 are provided at both ends of the collection box 702, and a second heater 602 is provided on one side of the heating box 8. The collection box 702 also includes a drainage mechanism for guiding the adhesive in the collection box 702 into the heating box 8. Specifically, this embodiment does not limit the specific models of the first heater 401 and the second heater 602, as long as they meet the actual application requirements. The working principle of this embodiment is as follows: When the adhesive flows to the collection box 702, the adhesive in the collection box 702 can be transported to the heating box 8 through the drainage mechanism. The adhesive can be heated and kept warm by the second heater 602 to maintain the fluidity of the adhesive. It should be emphasized that the core improvement of this embodiment is that the adhesive collected in the collection box 702 is heated and kept warm by the heating box 8 so that the adhesive can always maintain the corresponding fluidity, so as to facilitate subsequent recycling.

[0035] It should be noted that, in this embodiment, the collection box 702 has through grooves at both ends for discharging adhesive, and partitions 703 are slidably embedded in the through grooves on both sides. A guide plate 707 is also slidably arranged inside the collection box 702. A translation mechanism 6 is fixedly arranged on the coating machine frame 1, and the driving end of the translation mechanism 6 is fixedly connected to the guide plate 707. It can be explained that, in the initial state, the guide plate 707 is located on one side inside the collection box 702. When it is necessary to introduce the adhesive in the collection box 702 into one side of the heating box 8, the guide plate 707 can be pushed to slide inside the collection box 702 by the translation mechanism 6, so as to scrape the adhesive with poor flowability in the collection box 702 toward one side of the collection box 702. Since the partitions 703 are slidably arranged at both ends of the collection box 702, when the adhesive flows toward the heating box 8, the partitions 703 can be driven to shift to one side.

[0036] It should be noted that, such as Figures 7-9 The top two sides of the guide plate 707 are respectively fixedly provided with protruding plates 708; specifically, when the translation mechanism 6 drives the guide plate 707 to move, the protruding plate 708 can first contact the partition 703, and then push the partition 703 to slide through the protruding plate 708. In this process, a guide gap is formed between the partition 703 and the guide plate 707, so that the adhesive can be discharged into the heating box 8 along the guide gap.

[0037] In addition, in order to drive the partition 703 to reset, a first guide shaft 706 is fixedly arranged on one side of the baffle 701. A first guide seat 704 fixedly connected to the partition 703 is slidably sleeved on the first guide shaft 706. A first spring 705 is provided on the first guide shaft 706. Specifically, when the partition 703 moves, it can push the partition 703 to move synchronously, thereby compressing the first spring 705 and generating elastic force, so as to drive the partition 703 to reset in the future.

[0038] like Figures 6 to 9 In this embodiment, to ensure the sealing and heat preservation effect of the heating box 8, a guide port 806 is provided on the heating box 8, and a cover plate 802 is slidably arranged on the guide port 806. An L-shaped bracket 803 is fixedly arranged on one side of the heating box 8, and a second guide shaft 804 fixedly connected to the cover plate 802 is slidably inserted on the L-shaped bracket 803. A second spring 805 is provided on the second guide shaft 804. It can be noted that, initially, the cover plate 802 is in a closed state of the guide port 806. When the guide plate 707 pushes the partition 703 to slide, the partition 706... 3. Simultaneously push the cover plate 802 to move on the heating box 8 to open the guide port 806, so that the guide gap is connected with the guide port 806, and then discharge the adhesive into the heating box 8. During this process, the cover plate 802 can push the second guide shaft 804 to slide on the L-shaped bracket 803 to compress the second spring 805 and generate elastic force, so as to drive the cover plate 802 to reset in the future. Based on this, this embodiment can achieve the effect of automatically adjusting the opening and closing of the guide port 806, so that the heat preservation effect of the heating box 8 is better and heat is prevented from being lost along the guide port 806.

[0039] In addition, in order to recycle the adhesive in the heating box 8, in this embodiment, an adhesive pump 601 is provided on one side of the heating box 8, and the other end of the adhesive pump 601 is connected to the adhesive storage tank 4 through the adhesive delivery pipe 502. Specifically, after the adhesive is heated and kept warm by the heating box 8, its fluidity meets the requirements, and the adhesive pump 601 can be started. The adhesive pump 601 re-enters the adhesive into the adhesive storage tank 4 along the adhesive delivery pipe 502 for recycling.

[0040] A method for operating the adhesive scraper adjustment device of a self-adhesive hot melt adhesive coating machine includes the following steps: S1. Material preparation and film threading: Load film roll 201 and film roll 302 into the first roll 2 and the second roll 3 respectively, and then they are connected to the take-up roll 301 after passing through each roller in sequence.

[0041] S2, Heating and supplying adhesive: Start the first heater 401 to melt the adhesive in the adhesive storage tank 4, and then enter the adhesive discharge trough 404 of the adhesive discharge roller 403 through the adhesive discharge box 402 to be discharged.

[0042] S3, Linked Glue Application: The film roll 201 drives the glue application roller 5 to rotate, and the glue application roller 5 drives the glue discharge roller 403 to rotate through the belt pulley structure 501, discharging the glue liquid onto the surface of the glue application roller 5 in a metered manner.

[0043] S4. Scraping and spreading adhesive: The scraper 7 scrapes off the excess adhesive from the surface of the coating roller 5. The scraped adhesive is blocked by the baffle 701 and flows into the collection box 702 for temporary storage.

[0044] S5. Coating and laminating: The coating roller 5 transfers a uniform adhesive layer to the upper surface of the first roll film 201, and then presses it with the second roll film 302 at the first bonding roller 101 and the second bonding roller 102 to form a composite film 303, which is then wound up by the take-up material 301.

[0045] S6. Collection and heating: The translation mechanism 6 pushes the guide plate 707 to push the adhesive in the collection box 702 into the heating box 8 through the guide port 806, where it is heated and kept warm by the second heater 602.

[0046] S7. Recycling: The glue pump 601 sends the heat-insulated glue in the heating box 8 back to the glue storage tank 4 for recycling via the glue delivery pipe 502.

[0047] S8. Automatic Reset: After the glue discharge is completed, the translation mechanism 6, partition 703 and cover plate 802 automatically reset under the action of springs, and the equipment continues to run.

[0048] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of this application as claimed.

Claims

1. A scraper adjustment device for a self-adhesive hot melt adhesive coating machine, comprising a coating machine frame (1), wherein one end of the coating machine frame (1) is provided with a first roll material (2) for outputting a roll of film to be coated (201), and the other end is provided with a second roll material (3) for outputting a roll of film (302), the second roll of film (302) being used to engage with the first roll of film (201) to form a composite film (303), and the coating machine frame (1) is also provided with a take-up material (301) for taking up the composite film (303). Its features are, The coating machine frame (1) is symmetrically arranged with a first adhesive roller (101) and a second adhesive roller (102). After the first roll of film (201) passes over the first adhesive roller (101), it is bonded to the second roll of film (302) that passes over the second adhesive roller (102) to form a composite film (303). The first bonding roller (101) is provided with a coating roller (5), and the coating roller (5) is provided with a glue feeding module for discharging the self-adhesive hot melt glue onto the coating roller (5). A scraper (7) is provided on one side of the coating roller (5) for scraping the glue liquid on the coating roller (5) evenly. The scraper (7) is also provided with a liquid guiding mechanism, which is used to discharge the glue liquid accumulated on the scraper (7) in a timely manner.

2. The adhesive scraper adjustment device for a self-adhesive hot melt adhesive coating machine as described in claim 1, characterized in that, The glue dispensing module includes a glue storage tank (4) fixed on the frame (1) of the coating machine. A first heater (401) is provided on one side of the glue storage tank (4). A glue discharge tank (402) is provided at the bottom of the glue storage tank (4). A glue discharge port is opened at the bottom of the glue discharge tank (402). The glue discharge roller (403) is rotatably arranged inside the box at the glue discharge port. The outer side of the glue discharge roller (403) is connected to the glue coating roller (5) through a belt pulley structure (501). The outer wall of the glue discharge roller (403) is in contact with the inner wall of the glue discharge box (402). A glue discharge groove (404) is opened on the roller wall of the glue discharge roller (403).

3. The adhesive scraper adjustment device for a self-adhesive hot melt adhesive coating machine as described in claim 1, characterized in that, The scraper (7) has baffles (701) fixedly arranged on both sides, and the baffles (701) on both sides slide against the sides of the coating roller (5).

4. The adhesive scraper adjustment device for a self-adhesive hot melt adhesive coating machine as described in claim 3, characterized in that, The scraper (7) is provided with a collection box (702) on the side away from the coating roller (5), and the collection box (702) has a collection port.

5. The adhesive scraper adjustment device for a self-adhesive hot melt adhesive coating machine as described in claim 4, characterized in that, The collection box (702) is also provided with heating boxes (8) at both ends, and a second heater (602) is provided on one side of the heating box (8). It also includes a draining mechanism, which is used to guide the adhesive liquid in the collection box (702) into the heating box (8).

6. The adhesive scraper adjustment device for a self-adhesive hot melt adhesive coating machine as described in claim 5, characterized in that, The collection box (702) has through grooves at both ends for discharging adhesive liquid, and partitions (703) are slidably embedded in the through grooves on both sides. The collection box (702) is also equipped with a guide plate (707) that slides inside, and a translation mechanism (6) is fixedly installed on the frame (1) of the coating machine. The driving end of the translation mechanism (6) is fixedly connected to the guide plate (707).

7. The adhesive scraper adjustment device for a self-adhesive hot melt adhesive coating machine as described in claim 6, characterized in that, The top two sides of the guide plate (707) are respectively fixedly provided with protruding plates (708).

8. The adhesive scraper adjustment device for a self-adhesive hot melt adhesive coating machine as described in claim 6, characterized in that, A first guide shaft (706) is fixedly arranged on one side of the baffle (701), a first guide seat (704) is slidably sleeved on the first guide shaft (706) and fixedly connected to the partition (703), and a first spring (705) is provided on the first guide shaft (706).

9. The adhesive scraper adjustment device for a self-adhesive hot melt adhesive coating machine as described in claim 8, characterized in that, The heating box (8) has a guide port (806), a cover plate (802) is slidably arranged on the guide port (806), an L-shaped bracket (803) is fixedly arranged on one side of the heating box (8), a second guide shaft (804) is slidably inserted on the L-shaped bracket (803) and fixedly connected to the cover plate (802), and a second spring (805) is provided on the second guide shaft (804).

10. The adhesive scraper adjustment device for a self-adhesive hot melt adhesive coating machine as described in claim 5, characterized in that, A glue pump (601) is provided on one side of the heating box (8), and the other end of the glue pump (601) is connected to the glue storage tank (4) through a glue delivery pipe (502).

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