Environment-friendly hot melt adhesive high-speed uniform coating device

Abstract

The utility model relates to the technical field of hot melt adhesive coating equipment, and particularly discloses an environment-friendly hot melt adhesive high-speed uniform coating device which comprises a guide frame which is of a U-shaped linear frame body structure, a conveying belt is arranged at an opening in the upper end of the guide frame, and two discharging heat preservation boxes are symmetrically arranged at the upper end of the guide frame; a cavity for storing a hot melt adhesive solution is formed in the discharging heat preservation box. According to the environment-friendly high-speed uniform coating device for the hot melt adhesive, the hot melt adhesive can be uniformly sprayed on the surface of a base material through the adhesive spraying openings formed in the bottom end of the sealing cover at equal intervals, uniform coating of the hot melt adhesive can be conveniently assisted by increasing hot melt adhesive spraying points, and the height of the material homogenizing roller rod can be flexibly adjusted through the lifting rod, so that a proper distance is kept between the material homogenizing roller rod and the surface of the base material; in the coating process, the material uniformizing roller rod evenly distributes sprayed hot melt adhesive for the first time, the hot melt adhesive which is stacked or unevenly distributed is flattened, the inclined block structure at the bottom end of the scraper frame plays a role, and excessive hot melt adhesive is scraped off along with movement of a base material.

Description

Technical Field

[0001] This utility model relates to the technical field of hot melt adhesive coating equipment, specifically an environmentally friendly high-speed uniform hot melt adhesive coating device. Background Technology

[0002] Hot melt adhesives, which are solid at room temperature, become liquid when heated to a certain temperature, and rapidly solidify upon cooling, are widely used in packaging, printing, clothing, electronics, and many other fields due to their advantages such as high bonding strength, fast curing speed, and no pollution. As industries continue to demand higher production efficiency and product quality, hot melt adhesive coating technology is also constantly evolving.

[0003] Traditional hot melt adhesive coating equipment has an unreasonable coating head design. During high-speed coating, it is unable to distribute the hot melt adhesive evenly onto the substrate, which easily leads to inconsistent coating thickness. Furthermore, due to severe local glue shortages or overflows, the hot melt adhesive cannot be evenly distributed on the material surface, seriously affecting product quality. Utility Model Content

[0004] The purpose of this invention is to provide an environmentally friendly hot melt adhesive high-speed uniform coating device to solve the problems mentioned in the background art, such as the inability to uniformly distribute hot melt adhesive onto the substrate during high-speed coating, the easy occurrence of inconsistent coating thickness, and the inability to uniformly distribute hot melt adhesive on the material surface due to severe local glue shortage or overflow.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly hot melt adhesive high-speed uniform coating device, including a guide frame, which is a U-shaped straight frame structure. The upper end of the guide frame is provided with a conveyor belt, and two discharge heat preservation boxes are symmetrically arranged on the upper end of the guide frame. The discharge heat preservation boxes contain cavities containing hot melt adhesive liquid.

[0006] The upper end of the guide frame is equipped with a positioning side plate, and the bottom end of the inner wall of the positioning side plate is equipped with a guide roller frame. The positioning side plate is provided with a strip slide rail, and the surface of the positioning side plate is provided with a limit frame. A discharge heat preservation box is installed between the two positioning side plates, and a sealing cover is closed at the upper end of the discharge heat preservation box. A feed pipe and a one-way valve are installed inside the sealing cover, and the feed pipe and the one-way valve are respectively connected to the corresponding pipes.

[0007] The sealing cover has glue spray nozzles equidistantly arranged at the bottom end, and two lifting rods are symmetrically arranged on both sides of the bottom end of the sealing cover. The output end of the lifting rod is rotatably connected to a material distribution roller. A positioning frame is installed in the strip slide rail of the positioning side plate, and the surface of the positioning frame is engaged with one end of the scraper frame.

[0008] Using the above technical solution, the positioning side plate, guide roller frame, and limiting frame work together to position the substrate, ensuring accurate coating position.

[0009] Preferably, the guide roller frame at the opening of the strip slide rail of the positioning side plate is disconnected, and the positioning side plate is penetrated by one end of the cooling cylinder pipe, and a cooling cylinder is installed between the two positioning side plates.

[0010] Using the above technical solution, the cooling cylinder penetrates through the positioning side plate and is installed between the two positioning side plates, which can quickly cool and cure the hot melt adhesive after the substrate is coated, thereby improving production efficiency.

[0011] Preferably, the limiting frame is composed of a rectangular plate and a hydraulic column, and the hydraulic column of the limiting frame penetrates through the positioning side plate.

[0012] Using the above technical solution, the limiting frame can flexibly adjust the limiting range according to different substrate sizes, effectively preventing the substrate from shifting during the coating process.

[0013] Preferably, the lifting rod is a two-section slidingly connected rod, and the lifting rod and the material leveling roller form a U-shape, with the material leveling roller above the conveyor belt.

[0014] By adopting the above technical solution, the U-shaped structure allows the material distribution roller to be stably positioned above the conveyor belt, which initially distributes the sprayed hot melt adhesive evenly, thereby improving the distribution of the hot melt adhesive on the substrate surface.

[0015] Preferably, the bottom end of the scraper frame is configured as an inclined block structure, and the inclined surface of the scraper frame faces the direction of the material leveling roller, and the scraper frame is above the conveyor belt.

[0016] By adopting the above technical solution, excess hot melt adhesive can be scraped off efficiently, coating thickness can be precisely controlled, local missing adhesive or overflow of adhesive can be effectively avoided, and the overall coating quality can be improved.

[0017] Preferably, the inner wall of the cooling cylinder is provided with a flow divider plate, and a flow guide rod is provided inside the cooling cylinder, and the cooling cylinder is above the guide roller frame.

[0018] By adopting the above technical solution, the distributor plate can evenly disperse the cold air, ensuring that the hot melt adhesive on the substrate surface cools and cures quickly and evenly, thereby improving production efficiency and curing quality.

[0019] Preferably, the diversion rod is composed of a spiral plate and a cylinder, and a sealing element is provided at the connection between the diversion rod and the diverter plate.

[0020] By adopting the above technical solution, the spiral plate setting of the flow guide rod can ensure that the cooling medium flows in the cooling cylinder along a preset path, maintaining a stable and efficient cooling effect.

[0021] Compared with the prior art, the beneficial effects of this utility model are: This environmentally friendly hot melt adhesive high-speed uniform coating device:

[0022] 1. The device uses equally spaced spray nozzles at the bottom of the sealing cover to evenly spray hot melt adhesive onto the substrate surface. Increasing the number of hot melt adhesive spray points facilitates uniform coating. The lifting rod can flexibly adjust the height of the equalizing roller to maintain a suitable distance from the substrate surface. During coating, the equalizing roller initially distributes the sprayed hot melt adhesive, leveling out any accumulated or unevenly distributed adhesive. The inclined block structure at the bottom of the scraper frame plays a crucial role, with its inclined surface facing the equalizing roller. As the substrate moves, it can further scrape away excess hot melt adhesive, precisely controlling the coating thickness, effectively avoiding localized adhesive shortages or overflows, and improving coating quality.

[0023] 2. In the device, by installing the cooling cylinder above the end of the transmission belt, when the coated substrate passes by, the flow divider and the guide rod inside the cooling cylinder work together. The spiral plate of the guide rod causes the cold air to flow along the spiral path, increasing the contact time and area with the substrate. The flow divider evenly disperses the cooling medium, ensuring that the entire substrate surface can be cooled quickly and evenly, accelerating the curing of the hot melt adhesive, improving production efficiency, and ensuring the consistency of the curing effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of this utility model;

[0025] Figure 2 This is a three-dimensional structural diagram of the installation of the positioning side plate and the sealing cover of this utility model;

[0026] Figure 3 This is a three-dimensional structural diagram of the guide frame and positioning side plate of this utility model.

[0027] Figure 4 This is a three-dimensional structural diagram of the positioning side plate and limiting frame of this utility model in use;

[0028] Figure 5 This is a three-dimensional structural diagram of the disassembled insulated box and sealing cover of this utility model;

[0029] Figure 6 This is a three-dimensional structural diagram of the installation of the cooling cylinder and the diversion rod of this utility model.

[0030] In the diagram: 1. Guide frame; 2. Conveyor belt; 3. Positioning side plate; 4. Guide roller frame; 5. Limiting frame; 6. Discharge insulation box; 7. Sealing cover; 8. Glue spray nozzle; 9. Feed pipe; 10. One-way valve; 11. Lifting rod; 12. Material distribution roller; 13. Positioning frame; 14. Scraper frame; 15. Cooling cylinder; 16. Diverting rod; 17. Diverting plate. Detailed Implementation

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

[0032] Please see Figures 1-6 This utility model provides a technical solution: an environmentally friendly hot melt adhesive high-speed uniform coating device, including a guide frame 1, a conveyor belt 2, a positioning side plate 3, a guide roller frame 4, a limiting frame 5, a discharge heat preservation box 6, a sealing cover 7, an adhesive spray nozzle 8, a feed pipe 9, a one-way valve 10, a lifting rod 11, a uniform roller 12, a positioning frame 13, a scraper frame 14, a cooling cylinder 15, a diversion rod 16, and a flow divider 17;

[0033] Among them, the guide frame 1 is a U-shaped straight frame structure. The upper end of the guide frame 1 is provided with a conveyor belt 2, and two discharge heat preservation boxes 6 are symmetrically arranged on the upper end of the guide frame 1. The discharge heat preservation boxes 6 contain cavities containing hot melt adhesive liquid.

[0034] A positioning side plate 3 is installed on the upper end of the guide frame 1, and a guide roller frame 4 is installed on the bottom of the inner wall of the positioning side plate 3. The positioning side plate 3 has a strip slide rail, and a limit frame 5 is provided on the surface of the positioning side plate 3. The limit frame 5 is composed of a rectangular plate and a hydraulic column, and the hydraulic column of the limit frame 5 passes through the positioning side plate 3. A discharge heat preservation box 6 is installed between the two positioning side plates 3, and a sealing cover 7 is closed at the upper end of the discharge heat preservation box 6. A feed pipe 9 and a one-way valve 10 are installed inside the sealing cover 7, and the feed pipe 9 and the one-way valve 10 are respectively connected to the corresponding pipes.

[0035] Referring to the attached diagrams in the instruction manual Figures 1-6 As shown, during use, the guide frame 1 is installed on a horizontal workbench and connected to the substrate production line. During use, the conveyor belt 2 installed inside the guide frame 1 is kept flush with the conveyor belt of the production line, so that the movement direction of the conveyor belt 2 is from the limiting frame 5 towards the cooling cylinder 15. On the upper end of the guide frame 1, the positioning side plates 3 are symmetrically installed. At the bottom of the inner wall of the positioning side plate 3, the guide roller frame 4 is fixed by high-strength bolts to ensure that the installation position of the guide roller frame 4 is accurate and the roller can rotate flexibly. The limiting frame 5 is installed on the surface of the positioning side plate 3, and the hydraulic column of the limiting frame 5 is connected to the positioning side plate 3 through. After the connection is completed, the extension and retraction function of the hydraulic column is adjusted through the external hydraulic control system to ensure that the hydraulic column can extend and retract smoothly and achieve precise limiting of substrates of different sizes. During the debugging process, substrates of different sizes are simulated to test the limiting effect of the limiting frame 5, and the pressure parameters of the hydraulic control system are adjusted in time to ensure the accuracy of the limiting.

[0036] Next, tightly install the sealing cover 7 on the upper end of the discharge insulation box 6. Apply sealant to the connection between the sealing cover 7 and the discharge insulation box 6 to ensure a good sealing effect. Install the feed pipe 9 and the one-way valve 10 inside the sealing cover 7, and connect the feed pipe 9 and the one-way valve 10 to the corresponding hot melt adhesive supply pipes respectively. When connecting, use sealing tape to seal the connection to ensure a tight connection without leakage. After the overall installation is completed, conduct an air tightness test by filling the discharge insulation box 6 with a certain pressure of gas and observing whether there is any leakage at the connection. If there is any leakage, find the cause and repair it in time.

[0037] The sealing cover 7 has equidistant glue nozzles 8 at its bottom end, and two lifting rods 11 are symmetrically arranged on both sides of the bottom end of the sealing cover 7. The output end of the lifting rod 11 is rotatably connected to the material distribution roller rod 12. The positioning frame 13 is installed in the strip slide rail of the positioning side plate 3, and the surface of the positioning frame 13 is engaged with one end of the scraper frame 14. The lifting rod 11 is a two-section slidingly connected rod body, and the lifting rod 11 and the material distribution roller rod 12 form a U-shape. The material distribution roller rod 12 is above the conveyor belt 2. The bottom end of the scraper frame 14 is set as an inclined block structure, and the inclined surface of the scraper frame 14 is... Oriented towards the material distribution roller 12, and with the scraper frame 14 above the conveyor belt 2, the guide roller frame 4 at the opening of the strip slide rail of the positioning side plate 3 is disconnected, and the positioning side plate 3 is penetrated by one end of the cooling cylinder 15 pipe, and the cooling cylinder 15 is installed between the two positioning side plates 3. The inner wall side wall of the cooling cylinder 15 is provided with a flow divider 17, and the cooling cylinder 15 is provided with a flow guide rod 16 inside, and the cooling cylinder 15 is above the guide roller frame 4. The flow guide rod 16 is composed of a spiral plate and a cylinder, and a sealing element is provided at the connection between the flow guide rod 16 and the flow divider 17.

[0038] Referring to the attached diagrams in the instruction manual Figures 1-6 As shown, the conveyor belt 2 is started to transport the substrate according to the coating process requirements. At the same time, the hot melt adhesive supply system is turned on. The hot melt adhesive enters the discharge heat preservation box 6 through the feed pipe 9 and the one-way valve 10. The one-way valve 10 plays a role at this time, adjusting the air intake or exhaust according to the air pressure in the discharge heat preservation box 6 to increase or decrease the air pressure inside the discharge heat preservation box 6, and assisting the discharge heat preservation box 6 to discharge the material evenly. The hot melt adhesive liquid is evenly sprayed onto the surface of the substrate from the spray nozzle 8 at the bottom of the sealing cover 7. According to the coating process requirements, the height of the equalization roller 12 is adjusted by the lifting rod 11 to keep the equalization roller 12 at a suitable distance from the surface of the substrate. During the rotation of the equalization roller 12, the hot melt adhesive sprayed on the surface of the substrate is initially evenly distributed, so that the hot melt adhesive is more evenly distributed on the surface of the substrate. When adjusting the height of the equalization roller 12, the height of the equalization roller 12 can be precisely controlled by the scale markings on the equipment or the feedback from the sensor.

[0039] Subsequently, as the substrate continues to be conveyed forward, the height of the scraper frame 14 is adjusted by the positioning frame 13, so that the inclined structure of the bottom block of the scraper frame 14 can further scrape off the excess hot melt adhesive on the surface of the substrate, and precisely control the coating thickness of the hot melt adhesive. During the scraping process, the position and pressure of the scraper frame 14 can be adjusted in real time by observing the coating effect on the substrate surface. After the coating is completed, the substrate enters the cooling cylinder 15 area. Cold air enters through the pipe inlets on both sides of the cooling cylinder 15. The diverter plate 17 evenly disperses the incoming cold air. The special spiral plate structure of the guide rod 16 makes the cold air flow along a specific path, increasing the contact time and area with the hot melt adhesive on the substrate surface, and cooling and curing the hot melt adhesive on the substrate. After cooling and curing, the substrate is conveyed to the end of the equipment by the conveyor belt 2, completing the entire coating process.

[0040] Working Principle: When using this environmentally friendly high-speed uniform hot melt adhesive coating device, the hot melt adhesive liquid enters the discharge heat preservation box 6 through the feed pipe 9. The one-way valve 10 increases or decreases the air pressure inside the discharge heat preservation box 6, mainly assisting in the uniform discharge of the hot melt adhesive. The discharge heat preservation box 6 can keep the hot melt adhesive warm, maintaining its liquid fluidity for easy subsequent coating. The conveyor belt 2 on the guide frame 1 is responsible for transporting the substrate to be coated. The guide roller frame 4 on the positioning side plate 3 provides auxiliary guidance for the substrate, ensuring that the substrate enters the coating area smoothly. During use, the limit frame 5 provides assistance for higher substrates. During use, the substrate moves with the conveyor belt 2 to the bottom of the heat preservation box, so that the spray nozzle 8 on the sealing cover 7 sprays the hot melt adhesive liquid in the discharge heat preservation box 6. The adhesive is evenly sprayed onto the substrate. The lifting rod 11 can adjust the height of the equalizing roller 12. The equalizing roller 12 can perform preliminary equalization treatment on the hot melt adhesive sprayed on the substrate, making the hot melt adhesive more evenly distributed on the substrate surface. The positioning frame 13 moves up and down within the strip slide rail of the positioning side plate 3 to adjust its height. The inclined structure of the bottom block of the scraper frame 14 can further scrape off excess hot melt adhesive from the substrate surface, precisely controlling the coating thickness of the hot melt adhesive and ensuring coating uniformity. When the coated substrate passes through the cooling cylinder 15, the diversion plate 17 on the inner wall of the cooling cylinder 15 and the internal guide rod 16 work together to make the cold air flow evenly in the cooling cylinder 15, cooling and curing the hot melt adhesive on the substrate, completing the entire coating process and increasing the overall practicality.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly high-speed uniform coating device for hot melt adhesive, comprising: The guide frame (1) is a U-shaped straight frame structure. The upper end of the guide frame (1) is provided with a conveyor belt (2), and two discharge heat preservation boxes (6) are symmetrically arranged on the upper end of the guide frame (1). The discharge heat preservation box (6) contains a cavity containing hot melt adhesive liquid. The features are as follows: a positioning side plate (3) is installed on the upper end of the guide frame (1), and a guide roller frame (4) is installed on the bottom end of the inner wall of the positioning side plate (3). The positioning side plate (3) is provided with a strip slide rail, and a limit frame (5) is provided on the surface of the positioning side plate (3). A discharge heat preservation box (6) is installed between the two positioning side plates (3), and a sealing cover (7) is closed on the upper end of the discharge heat preservation box (6). A feed pipe (9) and a one-way valve (10) are installed inside the sealing cover (7), and the feed pipe (9) and the one-way valve (10) are respectively connected to the corresponding pipes. The sealing cover (7) has spray nozzles (8) evenly spaced at the bottom end, and two lifting rods (11) are symmetrically arranged on both sides of the bottom end of the sealing cover (7). The output end of the lifting rod (11) is rotatably connected to the material equalization roller rod (12). The positioning side plate (3) has a positioning frame (13) installed in the strip slide rail, and the surface of the positioning frame (13) is engaged with one end of the scraper frame (14).

2. The environmentally friendly high-speed uniform coating device for hot melt adhesive according to claim 1, characterized in that: The guide roller frame (4) at the opening of the strip slide rail of the positioning side plate (3) is disconnected, and the positioning side plate (3) is penetrated by one end of the cooling cylinder (15) pipe, and the cooling cylinder (15) is installed between the two positioning side plates (3).

3. The environmentally friendly high-speed uniform coating device for hot melt adhesive according to claim 1, characterized in that: The limiting frame (5) is composed of a rectangular plate and a hydraulic column, and the hydraulic column of the limiting frame (5) passes through the positioning side plate (3).

4. The environmentally friendly hot melt adhesive high-speed uniform coating device according to claim 1, characterized in that: The lifting rod (11) is a two-section slidingly connected rod, and the lifting rod (11) and the material equalization roller (12) form a U-shape, and the material equalization roller (12) is above the conveyor belt (2).

5. The environmentally friendly high-speed uniform coating device for hot melt adhesive according to claim 1, characterized in that: The bottom end of the scraper frame (14) is set as an inclined block structure, and the inclined surface of the scraper frame (14) faces the direction of the material equalization roller (12), and the scraper frame (14) is above the conveyor belt (2).

6. The environmentally friendly high-speed uniform coating device for hot melt adhesive according to claim 2, characterized in that: The cooling cylinder (15) has a flow divider (17) on its inner wall side surface, and a flow guide rod (16) is provided inside the cooling cylinder (15). The cooling cylinder (15) is located above the guide roller frame (4).

7. The environmentally friendly high-speed uniform coating device for hot melt adhesive according to claim 6, characterized in that: The diversion rod (16) is composed of a spiral plate and a cylinder, and a sealing element is provided at the connection between the diversion rod (16) and the diversion plate (17).

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