A glue dispensing device for PCB board processing

Abstract

The invention discloses a glue dispensing device for PCB board processing, relates to the field of PCB board processing, solves the problem that it is difficult to clean the glue dispensing needle of the existing glue dispensing device, comprises: a glue dispensing machine and a glue dispensing syringe installed at the output end of the glue dispensing machine, a turntable frame is arranged below the glue dispensing syringe, a driving turntable is arranged on the inner side of the turntable frame, four centrally symmetrical glue dispensing needles are arranged on the surface of the driving turntable, an electromagnetic suction joint is fixedly installed at the bottom end of the glue dispensing syringe, the top end of each of the glue dispensing needles is magnetically connected to the electromagnetic suction joint through a limit block, and an arc-shaped clamping plate is fixedly installed on the inner side of the turntable frame; it also comprises: a dredging mechanism for dredging the inner wall of the glue dispensing needle, and the dredging mechanism is installed on the outer side of the turntable frame; the invention can dredge the inner wall of the glue dispensing needle stored on the driving turntable through the dredging mechanism, thereby achieving the effect of facilitating the replacement of the glue dispensing needle and rapid dredging.

Description

Technical Field

[0001] The invention relates to the field of PCB board processing, in particular to a glue dispensing device for PCB board processing. Background Art

[0002] The PCB board is the support for electronic components and also the provider of electrical connections between them. It is the infrastructure of almost all electronic products. In addition to its basic function of fixing various small electronic components, its more important function is to provide mutual connection between the various electronic components above.

[0003] When processing PCB boards, a glue dispenser is usually required to dispense glue on the circuit board and its components, which can form a protective film to prevent moisture, dust or other corrosive substances from invading the circuit board and components, improve mechanical strength, waterproof performance, anti-fouling ability and insulation performance, and at the same time improve heat resistance and chemical resistance. The existing Chinese public patent document: CN116441125A discloses a PCB board processing glue dispenser. By setting a glue head mounting part, the glue dispensing needle of the required size can be automatically installed on the glue dispensing machine, and multiple glue dispensing needles can be replaced and stored through a turntable. However, when dispensing glue on the PCB board, the glue dispensing needle needs to be replaced frequently, and a certain amount of glue remains in the replaced glue dispensing needle. With the replacement and storage of multiple glue dispensing needles, when the glue dispensing needle on the turntable is replaced for a round, the glue dispensing needle cannot be replaced again, and the glue dispensing needle needs to be replaced once, and if the glue is not cleaned in time, it will solidify and block in the glue dispensing needle, which is difficult to clean later. Summary of the invention

[0004] The purpose of the present invention is to provide a glue dispensing device for PCB board processing to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A glue dispensing device for PCB board processing comprises: a glue dispensing machine and a glue dispensing syringe installed at the output end of the glue dispensing machine, a turntable frame is arranged below the glue dispensing syringe, a driving turntable is installed on the inner side of the turntable frame, four centrally symmetrical glue dispensing needles are arranged on the surface of the driving turntable, a plug hole for limiting the insertion of the glue dispensing needles is opened on the surface of the driving turntable, an electromagnetic suction joint is fixedly installed at the bottom end of the glue dispensing syringe, the top end of each of the glue dispensing needles is magnetically connected to the electromagnetic suction joint through a limit block, the limit block is made of carbon alloy, and when the electromagnetic suction joint contacts with the limit block of the glue dispensing needle, the glue dispensing needle can be connected to the glue dispensing syringe through magnetic suction, and can be connected through the electromagnetic suction joint The glue dispensing needle is separated from the glue dispensing syringe. An arc-shaped clamping plate located above the driving turntable is fixedly installed on the inner side of the turntable frame. The bottom of the arc-shaped clamping plate abuts against the limit block, so that the glue dispensing needle can be fixed on the driving turntable, and when the driving turntable rotates, the glue dispensing needle away from the arc-shaped clamping plate can dock with the glue dispensing syringe; it also includes: a dredging mechanism for dredging the inner wall of the glue dispensing needle, and the dredging mechanism is installed on the outer side of the turntable frame; a rotary brush mechanism for cleaning out the glue stuck on the inner wall of the glue dispensing needle, and the rotary brush mechanism is installed below the turntable frame; a glue collecting mechanism for collecting the glue discharged from the glue dispensing needle, and the glue collecting mechanism is installed at the bottom of the turntable frame.

[0007] Preferably, the dredging mechanism includes a mounting bracket fixedly mounted on the inner side of the dispensing machine, a bidirectional screw being rotatably mounted on the inner side of the mounting bracket, a moving block 1 which cooperates with the top thread of the bidirectional screw, the outer side of the moving block 1 being fixedly mounted with the turntable bracket, a driving motor being fixedly mounted on the top of the mounting bracket, an output end of the driving motor being fixedly connected to the top of the bidirectional screw, a moving block 2 which cooperates with the bottom thread of the bidirectional screw being slidably mounted on the inner side of the mounting bracket, a guide rod which slides through the moving block 1 and the moving block 2 being fixedly mounted on the inner side of the mounting bracket, and when the driving motor is running, the moving block 1 and the moving block 2 can be driven by the bidirectional screw to approach or move away from each other along the outer side of the guide rod, and an installation box located below the driving turntable is fixedly mounted on the outer side of the moving block 2, and three needle rods are arranged on the top of the installation box, which are respectively located directly below the three dispensing needles, for inserting the inner side of the dispensing needles on the driving turntable for dredging.

[0008] Preferably, the rotating brush mechanism includes an inner gear ring rotatably mounted on the inner side of the mounting box, the bottom end of the needle rod is fixedly mounted with a rotating rod extending to the inner side of the mounting box, the rotating rod is rotatably mounted on the inner side of the mounting box, and the end of the rotating rod away from the needle rod is fixedly mounted with a gear matching the inner gear ring, so that when the inner gear ring rotates, it can drive three gears to rotate synchronously to realize the rotation and dredging of the needle rod, and the bottom of the inner gear ring is fixedly mounted, and a mounting cylinder is fixedly mounted on the inner side of the annular frame, and a support rod is fixedly mounted on the bottom of the mounting frame, and the top and bottom of the mounting box are both provided with openings for the support rod to slide through, and the outer side of the support rod is provided with two centrally symmetrical spiral grooves, and two spiral strips respectively matching the two spiral grooves are fixedly mounted on the inner side of the mounting cylinder, so that when the mounting cylinder moves downward along the support rod, the spiral strip moves along the inner side of the spiral groove to make the mounting cylinder rotate, and a brush cylinder is fixedly mounted on the outer side of the needle rod for scraping out glue sticking to the inner side of the dispensing needle.

[0009] Preferably, the glue collecting mechanism includes a heating hood fixedly mounted on the bottom of the turntable frame, the outer side of the heating hood is made of heat-insulating material, an eddy current heating coil is fixedly mounted on the inner side of the heating hood, the dispensing needle is located on the inner side of the eddy current heating coil, the dispensing needle is heated to melt the glue, the height of the eddy current heating coil is greater than the height of the bottom end of the dispensing needle, which is convenient for comprehensive heating of the needle rod inserted into the dispensing needle, an insulation ring is fixedly mounted on the bottom of the heating hood to provide protection for the heating hood, and a retaining ring is fixedly mounted on the top of the installation box and is located directly below the heating hood to collect the cleaned glue.

[0010] Preferably, the thread pitch at the top end of the bidirectional screw is smaller than the thread pitch at the bottom end, thereby ensuring that the brush tube is completely removed from the dispensing needle.

[0011] Preferably, a positioning sleeve is provided on the outer side of the rotating rod, and the positioning sleeve is fixedly mounted on the top of the mounting box to improve the stability of the rotation of the rotating rod.

[0012] Preferably, the brush tube is made of elastic metal material, which facilitates flexible scraping of glue.

[0013] Preferably, the outer diameter of the brush tube is smaller than the inner diameter of the dispensing needle to prevent wear on the inner wall of the dispensing needle.

[0014] Preferably, a limit plate is fixedly mounted on the top end of the support rod, and the limit plate is located above the installation box to prevent the installation box from being separated from the support rod.

[0015] Preferably, a retaining ring 2 is fixedly installed on the top of the installation box, the height of the retaining ring 1 is the same as the height of the retaining ring 2, and the needle rod is located between the retaining ring 1 and the retaining ring 2 for collecting the melted glue.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention uses a dredging mechanism to replace the positions of four dispensing needles by driving a turntable, and uses magnetic fixation to make the electromagnetic suction joint on the dispensing syringe contact with the limit block on the dispensing needle away from the arc-shaped clamping plate, so that the dispensing needle can be assembled for easy replacement, and when the driving turntable moves downward, the inner wall of the dispensing needle stored on the driving turntable can be dredged to solve the problem of blockage of the dispensing needle, thereby achieving the effect of easy replacement of the dispensing needle and rapid dredging.

[0018] The present invention uses a rotating brush mechanism, which can keep the needle rod in a rotating state when it is inserted into the glue dispensing needle, drive the brush tube to rotate synchronously, facilitate rapid dredging of the glue dispensing needle, and scrape out glue stuck on the inner wall of the glue dispensing needle when the glue dispensing needle is separated from the needle rod, thereby achieving a comprehensive glue removal effect.

[0019] The present invention heats the glue dispensing needle and the needle rod by means of a glue collecting mechanism, quickly melts the glue on the inner wall of the glue dispensing needle, and collects the scraped glue, thereby achieving the effect of improving the glue removal efficiency and the glue collection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the mounting frame and the driving turntable in the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the heating cover and the eddy current heating coil in the present invention;

[0023] Figure 4 This is a schematic diagram of the needle rod and brush cylinder structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the installation box and the turntable frame in the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the inner gear ring and the rotating rod in the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the installation tube and the arc frame in the present invention;

[0027] Figure 8 It is a schematic diagram of the support rod and spiral strip structure in the present invention.

[0028] In the figure: 1. Glue dispensing machine; 2. Glue dispensing syringe; 3. Turntable frame; 4. Driving turntable; 5. Glue dispensing needle; 6. Electromagnetic suction joint; 7. Limit block; 8. Arc clamping plate; 9. Mounting frame; 10. Bidirectional screw; 11. Moving block one; 12. Driving motor; 13. Moving block two; 14. Guide rod; 15. Mounting box; 16. Needle rod; 17. Internal gear ring; 18. Rotating rod; 19. Gear; 20. Ring frame; 21. Mounting cylinder; 22. Support rod; 23. Spiral groove; 24. Spiral strip; 25. Brush cylinder; 26. Heating cover; 27. Eddy current heating coil; 28. Insulation ring; 29. ​​Retaining ring one; 30. Positioning sleeve; 31. Limit plate; 32. Retaining ring two. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative inspiration are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figure 1-Figure 8 The figure shows a glue dispensing device for PCB board processing, including a glue dispensing machine 1 and a glue dispensing syringe 2 installed at the output end of the glue dispensing machine 1, a turntable frame 3 is arranged below the glue dispensing syringe 2, a driving turntable 4 is installed on the inner side of the turntable frame 3, four centrally symmetrical glue dispensing needles 5 are arranged on the surface of the driving turntable 4, and a socket for limiting the insertion of the glue dispensing needles 5 is opened on the surface of the driving turntable 4. An electromagnetic suction connector 6 is fixedly installed at the bottom end of the glue dispensing syringe 2, and the top end of each glue dispensing needle 5 is magnetically connected to the electromagnetic suction connector 6 through a limit block 7. The limit block 7 is made of carbon alloy. When the electromagnetic suction connector 6 contacts the limit block 7 of the glue dispensing needle 5, the glue dispensing needle 5 can be connected to the glue dispensing syringe 2 through magnetic suction, and can The glue dispensing needle 5 is separated from the glue dispensing syringe 2 by the electromagnetic suction joint 6, and an arc-shaped clamping plate 8 located above the driving turntable 4 is fixedly installed on the inner side of the turntable frame 3. The bottom of the arc-shaped clamping plate 8 abuts against the limit block 7, which can fix the glue dispensing needle 5 on the driving turntable 4, and when the driving turntable 4 rotates, the glue dispensing needle 5 away from the arc-shaped clamping plate 8 can dock with the glue dispensing syringe 2; it also includes: a dredging mechanism for dredging the inner wall of the glue dispensing needle 5, and the dredging mechanism is installed on the outer side of the turntable frame 3; a rotary brush mechanism for cleaning out the glue stuck on the inner wall of the glue dispensing needle 5, and the rotary brush mechanism is installed below the turntable frame 3; a glue collecting mechanism for collecting the glue discharged from the glue dispensing needle 5, and the glue collecting mechanism is installed at the bottom of the turntable frame 3.

[0031] The dredging mechanism includes a mounting frame 9 fixedly mounted on the inner side of the dispensing machine 1, a bidirectional screw 10 is rotatably mounted on the inner side of the mounting frame 9, a moving block 11 matching the top thread of the bidirectional screw 10 is slidably mounted on the inner side of the mounting frame 9, the outer side of the moving block 11 is fixedly connected to the turntable frame 3, a driving motor 12 is fixedly mounted on the top of the mounting frame 9, the driving motor 12 can rotate forward or reverse, the output end of the driving motor 12 is fixedly connected to the top of the bidirectional screw 10, and a moving block 11 matching the bottom thread of the bidirectional screw 10 is slidably mounted on the inner side of the mounting frame 9. The guide rod 14 that slides through the moving block 11 and the moving block 2 13 is fixedly installed on the inner side of the mounting frame 9. When the driving motor 12 is running, the moving block 11 and the moving block 2 13 can be driven to approach or move away from each other along the outer side of the guide rod 14 through the bidirectional screw 10. The outer side of the moving block 2 13 is fixedly installed with a mounting box 15 located below the driving turntable 4. The top of the mounting box 15 is provided with three needle rods 16 that are respectively located directly below the three dispensing needles 5, which are used to be inserted into the inner side of the dispensing needles 5 on the driving turntable 4 for dredging;

[0032] When the driving motor 12 is running, the moving block 11 and the moving block 2 13 are driven to move away from each other through the bidirectional screw 10, and the moving block 11 drives the turntable frame 3 to move upward, so that the glue dispensing needle 5 on the glue dispensing syringe 2 is inserted into the jack of the driving turntable 4, and the turntable 4 is driven to rotate, so that the other glue dispensing needle 5 is in contact with the electromagnetic suction joint 6 on the glue dispensing syringe 2, and the glue dispensing needle 5 can be connected with the electromagnetic suction joint 6 through the limit block 7 to realize the replacement of the glue dispensing needle 5, and the limit block 7 of the replaced glue dispensing needle 5 is in contact with the arc clamping plate 8 to fix the glue dispensing needle 5. When the driving motor 12 rotates in the opposite direction, the driving turntable 4 drives the glue dispensing needle 5 to move downward, and the moving block 2 13 drives the needle rod 16 to be inserted into the inner side of the glue dispensing needle 5 through the installation box 15, so that the glue on the inner wall of the glue dispensing needle 5 can be dredged, thereby achieving the effect of facilitating the replacement of the glue dispensing needle 5 and rapid dredging.

[0033] The rotary brush mechanism includes an inner gear ring 17 rotatably mounted on the inner side of the mounting box 15, a rotating rod 18 extending to the inner side of the mounting box 15 is fixedly mounted on the bottom end of the needle rod 16, and the rotating rod 18 is rotatably mounted on the inner side of the mounting box 15. A gear 19 matching the inner gear ring 17 is fixedly mounted on one end of the rotating rod 18 away from the needle rod 16, so that when the inner gear ring 17 rotates, it can drive the three gears 19 to rotate synchronously, thereby realizing the rotation and dredging of the needle rod 16. An annular frame 20 is fixedly mounted on the bottom of the inner gear ring 17, and an installation cylinder 21 is fixedly mounted on the inner side of the annular frame 20. A support rod 22 is fixedly installed at the bottom of the frame 9, and openings are provided at the top and bottom of the installation box 15 for the support rod 22 to slide through. Two spiral grooves 23 are provided on the outer side of the support rod 22 in a centrally symmetrical manner. Two spiral strips 24 respectively matched with the two spiral grooves 23 are fixedly installed on the inner side of the installation cylinder 21, so that when the installation cylinder 21 moves downward along the support rod 22, the spiral strips 24 move along the inner side of the spiral groove 23 to rotate the installation cylinder 21. A brush cylinder 25 is fixedly installed on the outer side of the needle rod 16 for scraping out the glue stuck on the inner side of the dispensing needle 5;

[0034] When the installation box 15 moves, it drives the annular frame 20 to move synchronously, so that the installation tube 21 inside the annular frame 20 moves along the outer side of the support rod 22, and the two spiral strips 24 inside the installation tube 21 move along the spiral groove 23 on the support rod 22, so that the installation tube 21 is in a state of rotation and movement, and the installation tube 21 can drive the inner gear ring 17 to rotate through the annular frame 20, so that the inner gear ring 17 drives the gear 19 to rotate, and the gear 19 drives the needle rod 16 to rotate through the rotating rod 18, so that the needle rod 16 is rotated to insert the inner wall of the glue dispensing needle 5, which is convenient for dredging the glue, and the brush tube 25 outside the needle rod 16 can rotate and scrape the glue inside the glue dispensing needle 5, and when the moving block 11 and the moving block 2 13 are away from each other, the scraped glue is pulled out through the brush tube 25, thereby achieving a comprehensive glue removal effect.

[0035] The glue collecting mechanism includes a heating cover 26 fixedly mounted on the bottom of the turntable frame 3. The outer side of the heating cover 26 is made of heat-insulating material. An eddy current heating coil 27 is fixedly mounted on the inner side of the heating cover 26. The glue dispensing needle 5 is located on the inner side of the eddy current heating coil 27. The glue dispensing needle 5 is heated to melt the glue. The height of the eddy current heating coil 27 is greater than the height of the bottom end of the glue dispensing needle 5, which is convenient for fully heating the needle rod 16 inserted into the glue dispensing needle 5. A heat insulation ring 28 is fixedly mounted on the bottom of the heating cover 26 to provide protection for the heating cover 26. A retaining ring 29 located directly below the heating cover 26 is fixedly mounted on the top of the installation box 15 to collect the cleaned glue.

[0036] The heating hood 26 can start the eddy current heating coil 27 to heat the glue dispensing needle 5 stored on the driving turntable 4 and the needle rod 16 inserted into the glue dispensing needle 5, so that the solid glue remaining in the glue dispensing needle 5 melts, which is convenient for the needle rod 16 to quickly clear the glue dispensing needle 5 and the brush tube 25 to pull out the glue, thereby improving the cleaning efficiency. The cleaned glue can fall on the surface of the installation box 15 and be collected by the retaining ring 29, which is convenient for centralized cleaning at a later time, thereby achieving the effect of improving the glue removal efficiency and glue collection.

[0037] Working principle: First, the user operates the glue dispensing machine 1 to move the glue dispensing syringe 2 to the top of the turntable frame 3. Then, the user starts the driving motor 12, and the driving motor 12 drives the bidirectional screw 10 to rotate. The bidirectional screw 10 drives the moving block 11 and the moving block 2 13 to move away from each other. The moving block 11 drives the turntable frame 3 to move upward, so that the glue dispensing needle 5 on the glue dispensing syringe 2 is inserted into the jack of the driving turntable 4. At this time, the electromagnetic suction joint 6 is closed, and the limit block 7 on the glue dispensing needle 5 is released, so that the glue dispensing needle 5 is completely in contact with the inner side of the jack of the driving turntable 4. Subsequently, the driving turntable 4 moves. The stop block 7 of the glue dispensing needle 5 is driven to contact the arc-shaped card plate 8 to fix the glue dispensing needle 5. At the same time, another glue dispensing needle 5 on the driving turntable 4 is moved to the position directly below the electromagnetic suction joint 6. The electromagnetic suction joint 6 is operated to magnetically fix the stop block 7 on the glue dispensing needle 5 to complete the replacement of the glue dispensing needle 5. Then, the driving motor 12 is operated again and rotated in the opposite direction to drive the driving turntable 4 to drive the glue dispensing needle 5 to move downward, and the moving block 13 drives the annular frame 20 to move upward through the mounting box 15, so that the mounting tube 21 inside the annular frame 20 is moved along the support rod. The outer side of the mounting tube 22 moves, and the two spiral strips 24 inside the mounting tube 21 move along the spiral groove 23 on the support rod 22, so that the mounting tube 21 is in a state of rotation and movement. The mounting tube 21 drives the inner gear ring 17 to rotate through the annular frame 20, so that the inner gear ring 17 drives the gear 19 to rotate, and the gear 19 drives the needle rod 16 to rotate through the rotating rod 18. As the mounting box 15 moves, the needle rod 16 rotates and inserts into the inner wall of the dispensing needle 5 to dredge the glue of the dispensing needle 5. The brush tube 25 outside the needle rod 16 rotates and scrapes the glue inside the dispensing needle 5. At the same time, the heating cover 26 starts the eddy current heating. The hot coil 27 enables the eddy current heating coil 27 to heat the dispensing needle 5 stored on the driving turntable 4 and the needle rod 16 inserted into the dispensing needle 5, and the solid glue remaining in the dispensing needle 5 is melted by the heat, so that the needle rod 16 can quickly clear the dispensing needle 5. When the dispensing needle 5 on the dispensing syringe 2 is replaced again, the bidirectional screw 10 drives the moving block 11 and the moving block 2 13 away from each other, and the brush cylinder 25 can pull out the scraped glue, thereby achieving the effect of facilitating the replacement of the dispensing needle 5 and comprehensive clearing, facilitating continuous dispensing of the PCB board, and improving processing efficiency.

[0038] Example 2: Please refer to Figure 3-Figure 6 This embodiment further explains Example 1. The thread pitch of the top of the bidirectional screw 10 in the figure is smaller than the thread pitch of the bottom end, ensuring that the brush tube 25 is completely moved out of the glue dispensing needle 5. A positioning sleeve 30 is provided on the outside of the rotating rod 18. The positioning sleeve 30 is fixedly installed on the top of the mounting box 15 to improve the stability of the rotation of the rotating rod 18. The brush tube 25 is made of elastic metal material, which is convenient for scraping out glue flexibly. The outer diameter of the brush tube 25 is smaller than the inner diameter of the glue dispensing needle 5 to prevent wear on the inner wall of the glue dispensing needle 5.

[0039] In this embodiment: when the bidirectional screw 10 rotates, the difference between the top pitch and the bottom pitch of the bidirectional screw 10 is utilized, so that the moving block 11 can slowly move upward, while the moving block 2 13 moves downward quickly, so that the moving distance of the glue dispensing needle 5 on the driving turntable 4 is smaller than the moving distance of the needle rod 16 on the mounting box 15, thereby ensuring that the needle rod 16 and the brush barrel 25 are completely moved out from the inner side of the glue dispensing needle 5, and the rotating rod 18 can rotate along the inner side of the positioning sleeve 30 to improve the stability of the rotation of the rotating rod 18 and the needle rod 16, and the brush barrel 25 can flexibly scrape out the glue on the inner wall of the glue dispensing needle 5 and prevent the brush barrel 25 from causing wear to the inner wall of the glue dispensing needle 5.

[0040] Example 3: Please refer to Figure 6 This embodiment further illustrates other embodiments. A limit plate 31 is fixedly installed on the top of the support rod 22 in the figure. The limit plate 31 is located above the installation box 15 to prevent the installation box 15 from being separated from the support rod 22. A retaining ring 2 32 is fixedly installed on the top of the installation box 15. The height of the retaining ring 1 29 is the same as the height of the retaining ring 2 32. The needle rod 16 is located between the retaining ring 1 29 and the retaining ring 2 32 to collect the melted glue.

[0041] In this embodiment: when the installation box 15 moves along the outer side of the support rod 22, the limit plate 31 can prevent the installation box 15 from separating from the support rod 22, and provide protection for the opening of the installation box 15 to prevent glue from dripping in, and the heated and unblocked glue can fall between the retaining ring 1 29 and the retaining ring 2 32, so that the glue can be collected for later cleaning.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A glue dispensing device for PCB board processing, characterized in that: include: A glue dispensing machine (1) and a glue dispensing syringe (2) mounted at the output end of the glue dispensing machine (1); a turntable frame (3) is arranged below the glue dispensing syringe (2); a driving turntable (4) is mounted on the inner side of the turntable frame (3); four centrally symmetrical glue dispensing needles (5) are arranged on the surface of the driving turntable (4); an electromagnetic suction joint (6) is fixedly mounted at the bottom end of the glue dispensing syringe (2); the top end of each of the glue dispensing needles (5) is magnetically docked with the electromagnetic suction joint (6) via a limit block (7); and an arc-shaped clamping plate (8) located above the driving turntable (4) is fixedly mounted on the inner side of the turntable frame (3); Also includes: A dredging mechanism, used for dredging the inner wall of the dispensing needle (5), the dredging mechanism being mounted on the outer side of the turntable frame (3); A rotary brush mechanism, used for cleaning out glue stuck to the inner wall of the glue dispensing needle (5), the rotary brush mechanism being installed below the turntable frame (3); A glue collecting mechanism, used for collecting glue discharged from the glue dispensing needle (5), the glue collecting mechanism being mounted at the bottom of the turntable frame (3); The dredging mechanism comprises a mounting frame (9) fixedly mounted on the inner side of the dispensing machine (1), a bidirectional screw (10) being rotatably mounted on the inner side of the mounting frame (9), a moving block (11) matching with the top thread of the bidirectional screw (10) being slidably mounted on the inner side of the mounting frame (9), the outer side of the moving block (11) being fixedly connected to the turntable frame (3), a driving motor (12) being fixedly mounted on the top of the mounting frame (9), the output end of the driving motor (12) being fixedly connected to the top of the bidirectional screw (10). The mounting frame (9) is fixedly connected, a moving block (13) matched with the bottom thread of the bidirectional screw (10) is slidably mounted on the inner side of the mounting frame (9), a guide rod (14) slidingly penetrating the moving block (11) and the moving block (13) is fixedly mounted on the inner side of the mounting frame (9), a mounting box (15) located below the driving turntable (4) is fixedly mounted on the outer side of the moving block (13), and three needle rods (16) are respectively located directly below the three dispensing needles (5); The rotary brush mechanism comprises an inner gear ring (17) rotatably mounted on the inner side of the mounting box (15); a rotating rod (18) extending to the inner side of the mounting box (15) is fixedly mounted on the bottom end of the needle rod (16); the rotating rod (18) is rotatably mounted on the inner side of the mounting box (15); a gear (19) matching the inner gear ring (17) is fixedly mounted on one end of the rotating rod (18) away from the needle rod (16); an annular frame (20) is fixedly mounted on the bottom of the inner gear ring (17); the annular frame (20) is fixedly mounted on the inner side of the mounting box (15); 0) is fixedly mounted on the inner side of the mounting tube (21), a support rod (22) is fixedly mounted on the bottom of the mounting frame (9), the top and bottom of the mounting box (15) are both provided with openings for the support rod (22) to slide through, the outer side of the support rod (22) is provided with two centrally symmetrical spiral grooves (23), the inner side of the mounting tube (21) is fixedly mounted with two spiral strips (24) respectively matching with the two spiral grooves (23), and the outer side of the needle rod (16) is fixedly mounted with a brush tube (25); The glue collecting mechanism comprises a heating cover (26) fixedly mounted on the bottom of the turntable frame (3), the outer side of the heating cover (26) is made of heat-insulating material, an eddy current heating coil (27) is fixedly mounted on the inner side of the heating cover (26), the glue dispensing needle (5) is located on the inner side of the eddy current heating coil (27), the height of the eddy current heating coil (27) is greater than the height of the bottom end of the glue dispensing needle (5), a heat-insulating ring (28) is fixedly mounted on the bottom of the heating cover (26), and a retaining ring (29) located directly below the heating cover (26) is fixedly mounted on the top of the installation box (15).

2. A glue dispensing device for PCB board processing according to claim 1, characterized in that: The thread pitch at the top end of the bidirectional screw (10) is smaller than the thread pitch at the bottom end.

3. The glue dispensing device for PCB board processing according to claim 1, characterized in that: A positioning sleeve (30) is provided on the outer side of the rotating rod (18), and the positioning sleeve (30) is fixedly mounted on the top of the mounting box (15).

4. The glue dispensing device for PCB board processing according to claim 1, characterized in that: The brush cylinder (25) is made of elastic metal material.

5. The glue dispensing device for PCB board processing according to claim 1, characterized in that: The outer diameter of the brush cylinder (25) is smaller than the inner diameter of the glue dispensing needle (5).

6. The glue dispensing device for PCB board processing according to claim 1, characterized in that: A limit plate (31) is fixedly mounted on the top end of the support rod (22), and the limit plate (31) is located above the installation box (15).

7. The glue dispensing device for PCB board processing according to claim 1, characterized in that: A second retaining ring (32) is fixedly mounted on the top of the installation box (15); the height of the first retaining ring (29) is the same as the height of the second retaining ring (32); and the needle rod (16) is located between the first retaining ring (29) and the second retaining ring (32).

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