Anti-blocking device of automatic glue supply hot melt glue machine

Abstract

The utility model belongs to the technical field of hot melt glue machines, and particularly relates to an automatic glue supply hot melt glue machine anti-blocking device which comprises a bottom plate, a supporting table is fixedly installed on the bottom plate, a melting cylinder is fixedly installed on the supporting table, a rotating rod is rotatably installed in the melting cylinder, a cleaning frame is fixedly installed below the rotating rod, and a glue supply device is fixedly installed on the cleaning frame. Three groups of scraping plates are fixedly mounted on the cleaning frame, a gear pump is fixedly mounted on the bottom plate, a discharge port of the gear pump is fixedly communicated with a material guide pipe, the material guide pipe is fixedly communicated with a reversing valve through a connecting pipe, and the reversing valve is fixedly communicated with an air inlet pipe and a glue spraying head. A scraping plate on a cleaning frame in the melting cylinder can drive a brush to clean a filter screen in a discharging pipe, so that the condition that the filter screen is blocked is prevented; when glue supply needs to be stopped, the air inlet pipe is communicated with the glue spraying head by rotating a switch of the reversing valve, and residual glue in the glue spraying head is blown away by high-pressure gas, so that the hot melt glue is prevented from being blocked in the glue spraying head.

Description

Technical Field

[0001] This utility model relates to the field of hot melt glue machine technology, specifically to an anti-clogging device for an automatic glue supply hot melt glue machine. Background Technology

[0002] A hot melt adhesive machine is a device that automatically applies and sprays adhesive by heating and melting solid hot melt adhesive, turning it into a liquid, and then extruding it through a pumping system. The core principle is to use an electric heating device to melt the adhesive block / granules into a fluid, which is then pumped to the application head via a pump (such as a gear pump or piston pump) or pneumatic drive. Finally, the adhesive is applied through a nozzle or coating head.

[0003] However, in actual use, many clogging problems are encountered. The spray nozzle is easily clogged by cured adhesive due to the sudden drop in outlet temperature and long-term residue; the filter screen also becomes clogged due to untimely cleaning of impurities. These problems affect the spraying effect, equipment stability, and increase maintenance costs. To reduce clogging in hot melt adhesive machines, we propose an anti-clogging device for automatic adhesive supply hot melt adhesive machines. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an anti-clogging device for an automatic hot melt glue dispensing machine. A rotating rod is installed inside the melting cylinder, and a cleaning frame is fixedly mounted on the rod. A scraper on the cleaning frame drives a brush to clean the filter screen inside the discharge pipe, thus preventing clogging. When glue dispensing needs to be stopped, the reversing valve is turned to connect the air inlet pipe to the glue nozzle, allowing high-pressure gas to blow away any residual glue inside the nozzle, thereby preventing hot melt glue from clogging the nozzle and solving the problems mentioned earlier.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An anti-clogging device for an automatic hot melt glue dispensing machine includes a base plate, on which a support platform and a limiting frame are fixedly installed. A melting cylinder is fixedly installed on the support platform, and a discharge pipe is fixedly connected below the melting cylinder. A filter screen is installed inside the discharge pipe. A rotating rod is rotatably installed inside the melting cylinder, and a cleaning frame is fixedly installed below the rotating rod. Three sets of scrapers are fixedly installed on the cleaning frame, and several brushes are fixedly installed at one end of each scraper. A gear pump is fixedly installed on the base plate, and the discharge pipe is fixedly connected to the inlet of the gear pump. A guide pipe is fixedly connected to the outlet of the gear pump, and a connecting pipe is fixedly connected to the other end of the guide pipe. A reversing valve is fixedly connected to the connecting pipe, and an air inlet is fixedly connected to the valve port above the reversing valve. A glue spray head is fixedly connected to the valve port on the left side of the reversing valve.

[0007] Preferably, a sealing cover is fixedly installed above the melting cylinder, the sealing cover is rotatably connected to the rotating rod, a feed chute and a drive motor are fixedly installed on the sealing cover, and the drive shaft of the drive motor is fixedly sleeved with the rotating rod.

[0008] Preferably, a stirring frame is fixedly installed on the rotating rod, a plurality of stirring blades are fixedly installed on the stirring frame, and three sets of scrapers are fixedly installed on the side of the stirring frame.

[0009] Preferably, the gear pump is fitted with an insulation chamber, which is fixedly connected to the base plate. A fixed platform is fixedly installed on the base plate, and a drive motor is fixedly installed on the fixed platform. The transmission shaft of the drive motor is fixedly connected to the drive shaft of the gear pump.

[0010] Preferably, the limiting frame includes two sets of support plates, a limiting plate is fixedly installed between the support plates, a limiting groove is opened on the limiting plate, a limiting ring is fixedly installed on the connecting pipe, the limiting groove cooperates with the limiting ring, a connecting plate is fixedly installed between the guide pipe and the air inlet pipe, and a handle is fixedly installed on the gear pump.

[0011] Preferably, an electric heating wire is fixedly installed on the inner wall of the melting cylinder, and an insulation layer is fixedly fitted on the outer wall of the feed tube.

[0012] Beneficial effects

[0013] This invention provides an anti-clogging device for an automatic hot melt glue dispensing machine. Compared with the prior art, it has the following advantages:

[0014] 1. This automatic hot melt glue dispensing machine anti-clogging device is provided by installing a rotating rod inside the melting cylinder, on which a cleaning frame is fixedly installed. The scraper on the cleaning frame drives the brush to clean the filter screen in the discharge pipe, thereby preventing the filter screen from clogging. When it is necessary to stop the glue dispensing, the air inlet pipe is connected to the glue spray head by turning the switch of the reversing valve, so that the high-pressure gas blows away the glue residue in the glue spray head, thereby preventing the hot melt glue from clogging in the glue spray head. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the melting cylinder of this utility model;

[0017] Figure 3 This is a schematic diagram of the rotating rod, cleaning frame, and mixing frame of this utility model;

[0018] Figure 4 This is a schematic diagram of the present invention without the insulation compartment;

[0019] Figure 5 This is a schematic diagram of the material guide tube of this utility model;

[0020] Figure 6 This is a schematic diagram of the limiting frame of this utility model.

[0021] In the diagram: 1. Base plate; 2. Support platform; 3. Insulation chamber; 4. Melting tank; 5. Support plate; 6. Sealing cover; 7. Drive motor; 8. Feed trough; 9. Filter screen; 10. Rotating rod; 11. Mixing rack; 12. Cleaning rack; 13. Mixing blade; 14. Scraper; 15. Scraper plate; 16. Connecting pipe; 17. Discharge pipe; 18. Gear pump; 19. Fixed platform; 20. Drive motor; 21. Limiting frame; 22. Guide pipe; 23. Reversing valve; 24. Spray nozzle; 25. Air inlet pipe; 26. Connecting plate; 27. Limiting plate; 28. Limiting slot. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-6 This utility model provides a technical solution: an anti-clogging device for an automatic hot melt glue dispensing machine, comprising a base plate 1, a support platform 2 and a limiting frame 21 fixedly installed on the base plate 1, a melting cylinder 4 fixedly installed on the support platform 2, a discharge pipe 17 fixedly connected below the melting cylinder 4, a filter screen 9 installed inside the discharge pipe 17, a rotating rod 10 rotatably installed inside the melting cylinder 4, a cleaning frame 12 fixedly installed below the rotating rod 10, three sets of scrapers 15 fixedly installed on the cleaning frame 12, several brushes fixedly installed at one end of the scrapers 15, a gear pump 18 fixedly installed on the base plate 1, the discharge pipe 17 fixedly connected to the inlet of the gear pump 18, and a guide pipe 22 fixedly connected to the outlet of the gear pump 18. The other end is fixedly connected to a connecting pipe 16, which is fixedly connected to a reversing valve 23. The valve port above the reversing valve 23 is fixedly connected to an air inlet pipe 25, and the valve port on the left side of the reversing valve 23 is fixedly connected to a spray nozzle 24. A sealing cover 6 is fixedly installed above the melting cylinder 4. The sealing cover 6 is rotatably connected to the rotating rod 10. A feed trough 8 and a drive motor 7 are fixedly installed on the sealing cover 6. The drive shaft of the drive motor 7 is fixedly sleeved with the rotating rod 10. An electric heating wire is fixedly installed on the inner wall of the melting cylinder 4, and an insulation layer is fixedly fitted on the outer wall of the guide pipe 22. A stirring frame 11 is fixedly installed on the rotating rod 10. Several stirring blades 13 are fixedly installed on the stirring frame 11, and three sets of scraper blades 14 are fixedly installed on the side of the stirring frame 11.

[0024] In use, solid hot melt adhesive is poured from the feed trough 8 into the melting cylinder 4. Then, the electric heating wire on the inner wall of the melting cylinder 4 is energized to melt the hot melt adhesive. After that, the drive motor 7 is started, and the drive shaft of the drive motor 7 drives the rotating rod 10 to rotate. Then, the stirring blades 13 on the stirring frame 11 will stir the hot melt adhesive to ensure that it is heated evenly. The scraper 14 will scrape the inner wall of the melting cylinder 4 to prevent the hot melt adhesive from sticking to the inner wall of the melting cylinder 4. At the same time, the scraper 15 on the cleaning frame 12 will drive the brush to scrape the filter screen 9 in the discharge pipe 17 when it rotates, thereby cleaning the filter screen 9 and preventing the filter screen 9 from clogging.

[0025] A heat preservation chamber 3 is mounted on the gear pump 18. The heat preservation chamber 3 is fixedly connected to the base plate 1. A fixed platform 19 is fixedly installed on the base plate 1. A drive motor 20 is fixedly installed on the fixed platform 19. The transmission shaft of the drive motor 20 is fixedly sleeved with the drive shaft of the gear pump 18. The limiting frame 21 includes two sets of support plates 5. A limiting plate 27 is fixedly installed between the support plates 5. A limiting slot 28 is opened on the limiting plate 27. A limiting ring is fixedly installed on the connecting pipe 16. The limiting slot 28 cooperates with the limiting ring. A connecting plate 26 is fixedly installed between the guide pipe 22 and the air inlet pipe 25. A handle 29 is fixedly installed on the gear pump 18.

[0026] When glue supply needs to begin, the drive motor 20 is started, which drives the drive shaft of the gear pump 18 to rotate, thereby allowing the hot melt glue to be introduced from the discharge pipe 17 into the guide pipe 22. Then, it enters the reversing valve 23 through the connecting pipe 16, and finally sprays out from the spray nozzle 24. The worker can operate it by holding the handle 29. When glue supply needs to be stopped, the switch of the reversing valve 23 is turned to connect the spray nozzle 24 with the air inlet pipe 25, so that the high-pressure gas can clean the hot melt glue in the spray nozzle 24 and prevent the hot melt glue from clogging the spray nozzle 24 after cooling. At this time, the drive motor 20 should be turned off. When the equipment is not used, the connecting pipe 16 is locked on the limit frame 21 by the cooperation of the limit slot 28 and the limit ring. The heat preservation chamber 3 can keep the gear pump 18 warm and prevent the hot melt glue in the gear pump 18 from solidifying due to the low external temperature, which would block the gear pump 18. The heat preservation layer on the outer wall of the guide pipe 22 also serves the same purpose.

[0027] Working principle: In use, solid hot melt adhesive is poured into the melting tank 4 from the feed trough 8. Then, the electric heating wire on the inner wall of the melting tank 4 is energized to melt the hot melt adhesive. After that, the drive motor 7 is started. The drive shaft of the drive motor 7 drives the rotating rod 10 to rotate. Then, the stirring blades 13 on the stirring frame 11 will stir the hot melt adhesive to ensure that it is heated evenly. The scraper 14 will scrape the inner wall of the melting tank 4 to prevent the hot melt adhesive from sticking to the inner wall of the melting tank 4. At the same time, the scraper 15 on the cleaning frame 12 will drive the brush to scrape the filter screen 9 in the discharge pipe 17 when it rotates, thereby cleaning the filter screen 9 and preventing the filter screen 9 from clogging.

[0028] When glue supply needs to begin, the drive motor 20 is started, which drives the drive shaft of the gear pump 18 to rotate, thereby allowing the hot melt glue to be introduced from the discharge pipe 17 into the guide pipe 22. Then, it enters the reversing valve 23 through the connecting pipe 16, and finally sprays out from the spray nozzle 24. The worker can operate it by holding the handle 29. When glue supply needs to be stopped, the switch of the reversing valve 23 is turned to connect the spray nozzle 24 with the air inlet pipe 25, so that the high-pressure gas can clean the hot melt glue in the spray nozzle 24, preventing the hot melt glue from clogging the spray nozzle 24 after cooling. At this time, the drive motor 20 should be turned off. When the equipment is not used, the connecting pipe 16 is locked on the limit frame 21 by the cooperation of the limit slot 28 and the limit ring. The heat preservation chamber 3 can keep the gear pump 18 warm, preventing the hot melt glue in the gear pump 18 from solidifying due to the low external temperature, which would block the gear pump 18. The heat preservation layer on the outer wall of the guide pipe 22 also serves the same purpose.

[0029] This design effectively reduces clogging in hot melt glue machines.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] 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 anti-clogging device for an automatic hot melt glue dispensing machine, comprising a base plate (1), characterized in that: A support platform (2) and a limiting frame (21) are fixedly installed on the base plate (1). A melting cylinder (4) is fixedly installed on the support platform (2). A discharge pipe (17) is fixedly connected to the bottom of the melting cylinder (4). A filter screen (9) is installed inside the discharge pipe (17). A rotating rod (10) is rotatably installed inside the melting cylinder (4). A cleaning frame (12) is fixedly installed below the rotating rod (10). Three sets of scrapers (15) are fixedly installed on the cleaning frame (12). Several brushes are fixedly installed at one end of each scraper (15). A gear pump (18) is fixedly installed on the base plate (1). The discharge pipe (17) is fixedly connected to the inlet of the gear pump (18). The discharge port of the gear pump (18) is fixedly connected to a guide pipe (22). The other end of the guide pipe (22) is fixedly connected to a connecting pipe (16). The connecting pipe (16) is fixedly connected to a reversing valve (23). The valve port above the reversing valve (23) is fixedly connected to an air inlet pipe (25). The valve port on the left side of the reversing valve (23) is fixedly connected to a glue spray head (24).

2. The anti-clogging device for an automatic hot melt glue dispensing machine according to claim 1, characterized in that: A sealing cover (6) is fixedly installed above the melting cylinder (4). The sealing cover (6) is rotatably connected to the rotating rod (10). A feed chute (8) and a drive motor (7) are fixedly installed on the sealing cover (6). The drive shaft of the drive motor (7) is fixedly sleeved with the rotating rod (10).

3. The anti-clogging device for an automatic hot melt glue dispensing machine according to claim 1, characterized in that: A stirring frame (11) is fixedly installed on the rotating rod (10), and several stirring blades (13) are fixedly installed on the stirring frame (11). Three sets of scraper blades (14) are fixedly installed on the side of the stirring frame (11).

4. The anti-clogging device for an automatic hot melt glue dispensing machine according to claim 1, characterized in that: The gear pump (18) is fitted with a heat preservation chamber (3), which is fixedly connected to the base plate (1). A fixed platform (19) is fixedly installed on the base plate (1), and a drive motor (20) is fixedly installed on the fixed platform (19). The transmission shaft of the drive motor (20) is fixedly connected to the drive shaft of the gear pump (18).

5. The anti-clogging device for an automatic hot melt glue dispensing machine according to claim 1, characterized in that: The limiting frame (21) includes two sets of support plates (5), a limiting plate (27) is fixedly installed between the support plates (5), a limiting slot (28) is opened on the limiting plate (27), a limiting ring is fixedly installed on the connecting pipe (16), the limiting slot (28) cooperates with the limiting ring, a connecting plate (26) is fixedly installed between the guide pipe (22) and the air inlet pipe (25), and a handle (29) is fixedly installed on the gear pump (18).

6. The anti-clogging device for an automatic hot melt glue dispensing machine according to claim 1, characterized in that: The inner wall of the melting cylinder (4) is fixedly equipped with an electric heating wire, and the outer wall of the feed tube (22) is fixedly fitted with a heat insulation layer.

Images