Glue dispenser with precise positioning function for PCB (printed circuit board)

Abstract

The utility model relates to the technical field of dispensing machines, in particular to a dispensing machine with accurate positioning for a PCB (printed circuit board), which comprises a dispensing device, a sliding table arranged at the top of the dispensing device and discharging mechanisms arranged on the upper end face of the sliding table and capable of getting close to each other or getting away from each other. Two symmetrical mounting grooves are longitudinally formed in the upper end face of the moving seat, first electric telescopic rods are fixed in the mounting grooves, and push blocks which can be longitudinally adjusted and support the circuit board are fixed to the output ends of the first electric telescopic rods; a second electric telescopic rod is longitudinally embedded in one side of the movable seat, and a suspension rod capable of longitudinally moving is fixed to the output end of the second electric telescopic rod. The levelness of the circuit board is corrected by the first electric telescopic rod through the push block. And the problem of inclination of the circuit board is solved, so that the dispensing quality of the circuit board is improved.

Description

Technical Field

[0001] This utility model relates to the field of dispensing machine technology, specifically to a dispensing machine with precise positioning for PCB circuit boards. Background Technology

[0002] PCB board dispensing is a process that involves applying specialized adhesive to the surface of components to enhance fixation and protect sensitive devices. Automated equipment precisely controls the amount of adhesive applied, forming a protective layer that is shockproof, moisture-proof, and dustproof, while also improving heat dissipation. Commonly used materials include epoxy resin and silicone, which can withstand high temperatures or flexible applications. PCB board dispensing requires a specialized dispensing machine.

[0003] Chinese patent CN117019545A discloses a PCB circuit board processing dispensing machine. The need arises for a PCB circuit board processing dispensing machine capable of positioning the PCB circuit board before dispensing, thus improving dispensing accuracy. The PCB circuit board processing dispensing machine includes a fixed plate, a material conveying assembly, and a gantry frame. The material conveying assembly is rotatably connected between the front and rear sides of the fixed plate, and the gantry frame is fixed between the left sides of the front and rear sides of the fixed plate. During operation, the PCB circuit board is first placed on the material conveying assembly from the left. Then, the drive motor is activated, causing the lead screw to move the dispensing module to the position corresponding to the dispensing position on the PCB circuit board. Next, the servo motor is activated to rotate forward, causing the lifting plate to move the dispensing module downwards, and also causing the U-shaped positioning plate to move inwards to contact the PCB circuit board. The U-shaped positioning plate centers the PCB circuit board, and then the dispensing module is activated to dispense glue onto the PCB circuit board, thus completing the positioning and dispensing of the PCB circuit board, thereby improving dispensing accuracy.

[0004] The dispensing machine described in the aforementioned patent document, when dispensing adhesive onto PCB circuit boards, places the PCB circuit board on a material handling assembly, then activates the drive motor, causing the lead screw to move the dispensing module to the position corresponding to the PCB circuit board for dispensing. Then, the servo motor rotates forward, causing the lifting plate to move the dispensing module downwards, and simultaneously causing the U-shaped positioning plate to move inwards to contact the PCB circuit board, thus centering the PCB circuit board. However, due to the influence of the manufacturing process, the thickness of the PCB circuit board on both sides has a certain error. This causes the upper surface of the PCB circuit board to not be horizontal when placed, resulting in the adhesive easily sliding along the inclined surface of the PCB circuit board during dispensing, thus affecting the dispensing quality. Therefore, a dispensing machine with precise positioning for PCB circuit boards is proposed. Utility Model Content

[0005] To address the aforementioned problems, a precision-positioning dispensing machine for PCB circuit boards is provided. A height monitoring device monitors the height of the circuit board. Then, a first electric telescopic rod drives a pusher block at its output end to move longitudinally, allowing the pusher block to adjust the height of each of the four corners of the circuit board. This enables the first electric telescopic rod to correct the levelness of the circuit board via the pusher block, solving the problem of circuit board tilting and thus improving the dispensing quality.

[0006] To address the existing technical problems, this application provides a dispensing machine with precise positioning for PCB circuit boards, including a dispensing device, a slide table disposed on the top of the dispensing device, and a feeding mechanism disposed on the upper surface of the slide table that can move closer or further apart from each other. The feeding mechanism includes two sets of movable mounting slots, and two symmetrical movable seats are longitudinally opened on the upper surface of the mounting slots. A first electric telescopic rod is fixed inside the movable seat, and a push block that can be longitudinally adjusted and supports the circuit board is fixed at the output end of the first electric telescopic rod.

[0007] A second electric telescopic rod is longitudinally embedded on one side of the movable seat. A suspension rod capable of longitudinal movement is fixed at the output end of the second electric telescopic rod. A lifting rod capable of longitudinal movement is installed at the end of the suspension rod away from the second electric telescopic rod. A pressing block capable of contacting the upper surface of the circuit board is fixed at the bottom end of the lifting rod.

[0008] On the other side of the movable base, several height monitoring devices for monitoring the height of the circuit board are installed longitudinally.

[0009] As one technical solution of this application, the top of the lowering block is provided with a buffer spring for pushing it downward, and the buffer spring is sleeved on the outside of the lifting rod.

[0010] As one technical solution of this application, the height monitoring device includes a fixed base, and a photoelectric sensor for monitoring the height of the circuit board is longitudinally mounted on the side of the fixed base away from the movable base; a controller that can be electrically connected to the photoelectric sensor and the first electric telescopic rod is provided on one side of the movable base.

[0011] As one technical solution of this application, a straightening mechanism capable of straightening the circuit board is fixed at the center of the upper surface of the slide. The straightening mechanism includes a double-headed telescopic cylinder fixed to the upper surface of the slide. The output end of the double-headed telescopic cylinder is equipped with a straightening frame that can move closer or further away from each other and clamp the circuit board on both sides.

[0012] As one technical solution of this application, the upper surface of the slide table is provided with second sliding grooves for limiting the position on both sides near the double-headed telescopic cylinder; the bottom of the slide table is symmetrically provided with second sliders that can slide and cooperate with the second sliding grooves.

[0013] As one technical solution of this application, two relief grooves for limiting are symmetrically opened at the center of the upper surface of the slide along the X-axis, and a rotatable bidirectional threaded rod is installed inside the relief groove; a threaded sleeve that can be threadedly connected to the bidirectional threaded rod is provided at the center of the bottom of the movable seat.

[0014] As one technical solution of this application, the upper surface of the slide is provided with first sliding grooves for limiting the position on both sides near the relief groove; the bottom of the movable seat is provided with first sliders that can slide and cooperate with the first sliding grooves on both sides near the threaded sleeve.

[0015] As one technical solution of this application, a first servo motor for driving the bidirectional threaded rod to rotate is fixed on one side of the slide table, and one end of the bidirectional threaded rod can be fixedly connected to the output end of the first servo motor.

[0016] The advantages of this utility model compared to the prior art are:

[0017] This application utilizes a height monitoring device to monitor the height of the circuit board. Then, a first electric telescopic rod drives a pusher block at its output end to move longitudinally, allowing the pusher block to adjust the height of each of the four corners of the circuit board. This enables the first electric telescopic rod to correct the levelness of the circuit board via the pusher block, solving the problem of circuit board tilting and thus improving the dispensing quality. Attached Figure Description

[0018] Figure 1 This is a 3D view of a dispensing machine with precise positioning for PCB circuit boards.

[0019] Figure 2 This is a schematic diagram of a three-dimensional structure of a slide table in a PCB dispensing machine with precise positioning. Figure 1 .

[0020] Figure 3 This is a schematic diagram of a three-dimensional structure of a slide table in a PCB dispensing machine with precise positioning. Figure 2 .

[0021] Figure 4 This is a schematic diagram of a three-dimensional structure of a slide table in a PCB dispensing machine with precise positioning. Figure 3 .

[0022] Figure 5 This is a schematic diagram of the feeding mechanism in a PCB circuit board dispensing machine with precise positioning. Figure 1 .

[0023] Figure 6 This is a schematic diagram of the feeding mechanism in a PCB circuit board dispensing machine with precise positioning. Figure 2 .

[0024] Figure 7 This is a 3D view of a height monitoring device in a dispensing machine with precise positioning for PCB circuit boards.

[0025] The diagram is labeled as follows: 1. Dispensing device; 2. Slide table; 21. Clearing groove; 22. First slide groove; 23. First servo motor; 24. Bidirectional threaded rod; 25. Second slide groove; 3. Feeding mechanism; 31. Moving seat; 311. Mounting groove; 312. Threaded sleeve; 313. First slider; 32. First electric telescopic rod; 321. Push block; 33. Second electric telescopic rod; 331. Suspension rod; 332. Lifting rod; 333. Lowering block; 334. Buffer spring; 34. Height monitoring device; 341. Fixed seat; 342. Photoelectric sensor; 35. Controller; 4. Straightening mechanism; 41. Double-headed telescopic cylinder; 42. Straightening frame; 421. Second slider. Detailed Implementation

[0026] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0027] See Figures 1-7 As shown, a PCB circuit board dispensing machine with precise positioning includes a dispensing device 1, a slide table 2 disposed on the top of the dispensing device 1, and a feeding mechanism 3 disposed on the upper surface of the slide table 2 that can move closer or further apart from each other. The feeding mechanism 3 includes two sets of movable mounting slots 311. The upper surface of the mounting slots 311 has two symmetrical movable seats 31 longitudinally opened. A first electric telescopic rod 32 is fixed inside the movable seat 31. The output end of the first electric telescopic rod 32 is fixed with a push block 321 that can be longitudinally adjusted and supports the circuit board.

[0028] A second electric telescopic rod 33 is longitudinally embedded on one side of the movable seat 31. A suspension rod 331 capable of longitudinal movement is fixed at the output end of the second electric telescopic rod 33. A lifting rod 332 capable of longitudinal movement is installed at the end of the suspension rod 331 away from the second electric telescopic rod 33. A pressing block 333 capable of contacting the upper surface of the circuit board is fixed at the bottom end of the lifting rod 332.

[0029] On the other side of the movable base 31, several height monitoring devices 34 for monitoring the height of the circuit board are mounted longitudinally.

[0030] By placing the lower end of the circuit board on top of the push block 321, while the height monitoring device 34 monitors the height of the circuit board, the first electric telescopic rod 32 is activated. When the output end of the first electric telescopic rod 32 extends, it drives the push block 321 mounted on its output end to move upward, thus pushing the circuit board upward and raising its height. Conversely, when the output end of the first electric telescopic rod 32 retracts, it drives the push block 321 mounted on its output end to move downward, thus lowering the circuit board's height. This allows the first electric telescopic rod 32 and the push block 321 to work together to adjust the height of the four corners of the circuit board until the upper end of the circuit board is horizontal. To prevent the circuit board from shifting during adhesive dispensing, the second electric telescopic rod 33 drives the suspension rod 331 to move longitudinally. Simultaneously, the suspension rod 331 moves, driving the lifting rod 332, which in turn drives the bottom-fixed pressure block 333 to contact the upper surface of the circuit board. This allows the pressure block 333 and the push block 321 to work together to fix the circuit board in place, effectively preventing shifting during adhesive dispensing.

[0031] See Figure 5 and Figure 6 As shown, a buffer spring 334 for pushing the lower pressure block 333 downward is provided on the top of the lower pressure block 333. The buffer spring 334 is fitted on the outside of the lifting rod 332.

[0032] To prevent the downward pressure of the pressure block 333 from damaging the circuit board surface, a buffer spring 334 is installed outside the lifting rod 332. When the pressure block 333 contacts the circuit board surface, the top of the pressure block 333 gradually approaches the lower end face of the lifting rod 332. At this time, the upward force of the pressure block 333 will compress the buffer spring 334. At the same time, the reaction force of the buffer spring 334 pushes the pressure block 333 in the opposite direction, so that the bottom of the pressure block 333 can always contact the surface of the circuit board, while preventing the pressure of the pressure block 333 from being too large and damaging the circuit board.

[0033] See Figure 5 , Figure 6 and Figure 7 As shown, the height monitoring device 34 includes a fixed base 341, on the side of the fixed base 341 away from the movable base 31, a photoelectric sensor 342 for monitoring the height of the circuit board is longitudinally mounted; a controller 35 is provided on one side of the movable base 31, which can be electrically connected to the photoelectric sensor 342 and the first electric telescopic rod 32.

[0034] By setting a longitudinally fixed base 341 on the side of the height monitoring device 34 away from the movable base 31, the height monitoring device 34 monitors the height of the circuit board through the fixed base 341. Then, the fixed base 341 transmits the monitoring data to the controller 35 through the height monitoring device 34. The controller 35 then controls the first electric telescopic rod 32 to start, so that the first electric telescopic rod 32 adjusts the height of the four corners of the circuit board through the push block 321.

[0035] See Figure 2 , Figure 3 and Figure 4 As shown, a straightening mechanism 4 capable of straightening the circuit board is fixed at the center of the upper surface of the slide table 2. The straightening mechanism 4 includes a double-headed telescopic cylinder 41 fixed to the upper surface of the slide table 2. The output end of the double-headed telescopic cylinder 41 is equipped with a straightening frame 42 that can move closer or further away from each other and clamp the two sides of the circuit board.

[0036] To ensure the stability of the circuit board, a double-headed telescopic cylinder 41 is fixed to the upper surface of the slide table 2, and a straightening frame 42 is fixed to the output end of the double-headed telescopic cylinder 41. When the output end of the double-headed telescopic cylinder 41 retracts, the double-headed telescopic cylinder 41 drives the straightening frame 42 assembly to approach the side of the circuit board. When the straightening frame 42 contacts the side of the circuit board, it can straighten the circuit board and prevent the circuit board from shifting, effectively ensuring the stability of the circuit board.

[0037] See Figure 3 As shown, the upper surface of the slide table 2 is provided with second slide grooves 25 for limiting the position on both sides near the double-headed telescopic cylinder 41; the bottom of the slide table 2 is symmetrically provided with second sliders 421 that can slide and cooperate with the second slide grooves 25.

[0038] To ensure the stability of the straightening frame 42, a second slider 421 that can slide and engage with the second slide groove 25 is provided at the bottom of the straightening frame 42. When the straightening frame 42 moves, it can slide along the second slide groove 25 via the second slider 421, effectively preventing the straightening frame 42 from shifting during movement and thus ensuring the stability of the straightening frame 42.

[0039] See Figure 4 As shown, two relief grooves 21 for limiting are symmetrically opened at the center of the upper end face of the slide table 2 along the X-axis direction. A rotatable bidirectional threaded rod 24 is installed inside the relief groove 21. A threaded sleeve 312 that can be threadedly connected to the bidirectional threaded rod 24 is provided at the center of the bottom of the movable seat 31.

[0040] A rotatable bidirectional threaded rod 24 is installed inside the clearance groove 21, and then a threaded sleeve 312 provided at the bottom of the movable seat 31 is installed on the bidirectional threaded rod 24. When the bidirectional threaded rod 24 rotates clockwise, it can drive the movable seats 31 closer together through the threaded sleeve 312. Conversely, when the bidirectional threaded rod 24 rotates counterclockwise, it can drive the movable seats 31 further apart through the threaded sleeve 312.

[0041] See Figure 4 As shown, the upper end face of the slide table 2 is provided with first slide grooves 22 for limiting the position on both sides near the relief groove 21; the bottom of the movable seat 31 is provided with first sliders 313 that can slide and cooperate with the first slide grooves 22 on both sides near the threaded sleeve 312.

[0042] To ensure the stability of the movable seat 31, first sliders 313 that can slide and engage with the first groove 22 are provided on both sides of the bottom of the movable seat 31 near the threaded sleeve 312. When the movable seat 31 moves, the movable seat 31 can drive the first sliders 313 to slide along the first groove 22, effectively preventing the movable seat 31 from deviating during the movement, thereby ensuring the stability of the movable seat 31.

[0043] See Figure 4 As shown, a first servo motor 23 for driving the bidirectional threaded rod 24 to rotate is fixed on one side of the slide table 2, and one end of the bidirectional threaded rod 24 can be fixedly connected to the output end of the first servo motor 23.

[0044] A first servo motor 23 is fixed to one side of the slide table 2, and then one end of the bidirectional threaded rod 24 is fixedly connected to the output end of the first servo motor 23. When the first servo motor 23 is started, the first servo motor 23 can drive the bidirectional threaded rod 24 to rotate clockwise or counterclockwise through the output end.

[0045] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A precision positioning point dispenser for PCB circuit board, comprising a point dispenser device (1), a sliding table (2) arranged on the top of the point dispenser device (1), and a material placing mechanism (3) arranged on the upper end face of the sliding table (2) and capable of moving closer to or farther away from each other, characterized in that, The feeding mechanism (3) includes two sets of movable seats (31). The upper surface of the movable seat (31) has two symmetrical mounting slots (311) longitudinally opened. The first electric telescopic rod (32) is fixed inside the mounting slot (311). The output end of the first electric telescopic rod (32) is fixed with a push block (321) that can be longitudinally adjusted and supports the circuit board. A second electric telescopic rod (33) is longitudinally embedded on one side of the movable seat (31). The output end of the second electric telescopic rod (33) is fixed with a suspension rod (331) that can move longitudinally. A lifting rod (332) that can move longitudinally is installed at the end of the suspension rod (331) away from the second electric telescopic rod (33). A lower pressure block (333) that can contact the upper surface of the circuit board is fixed at the bottom end of the lifting rod (332). On the other side of the movable base (31), a number of height monitoring devices (34) for monitoring the height of the circuit board are longitudinally installed.

2. The precision positioning dispensing machine for PCB circuit board according to claim 1, wherein, The top of the lowering block (333) is provided with a buffer spring (334) for pushing it downward, and the buffer spring (334) is fitted outside the lifting rod (332).

3. The glue dispenser with accurate positioning for PCB circuit board according to claim 1, wherein, The height monitoring device (34) includes a fixed base (341), on the side of the fixed base (341) away from the movable base (31) a photoelectric sensor (342) for monitoring the height of the circuit board is mounted longitudinally; a controller (35) is provided on one side of the movable base (31) that can be electrically connected to the photoelectric sensor (342) and the first electric telescopic rod (32).

4. The precision positioning dispensing machine for PCB circuit board according to claim 1, wherein, A straightening mechanism (4) capable of straightening the circuit board is fixed at the center of the upper surface of the slide (2). The straightening mechanism (4) includes a double-headed telescopic cylinder (41) fixed on the upper surface of the slide (2). The output end of the double-headed telescopic cylinder (41) is equipped with a straightening frame (42) that can move closer or further away from each other and clamp the circuit board on both sides.

5. The precision positioning dispensing machine for PCB circuit board according to claim 4, wherein, The upper surface of the slide (2) near the double-headed telescopic cylinder (41) is provided with a second slide groove (25) for limiting the position; the bottom of the slide (2) is symmetrically provided with a second slider (421) that can slide and cooperate with the second slide groove (25).

6. The precision positioning dispensing machine for PCB circuit board according to claim 3, wherein, Two relief grooves (21) for limiting are symmetrically opened at the center of the upper end face of the slide (2) along the X-axis direction. A rotatable bidirectional threaded rod (24) is installed inside the relief groove (21). A threaded sleeve (312) that can be threadedly connected to the bidirectional threaded rod (24) is provided at the center of the bottom of the movable seat (31).

7. The precision positioning dispensing machine for PCB circuit board according to claim 6, wherein, The upper surface of the slide table (2) is provided with first slide grooves (22) for limiting the position on both sides near the relief groove (21); the bottom of the movable seat (31) is provided with first sliders (313) that can slide and cooperate with the first slide grooves (22) on both sides near the threaded sleeve (312).

8. The precision positioning dispensing machine for PCB circuit board according to claim 6, wherein, A first servo motor (23) for driving the bidirectional threaded rod (24) to rotate is fixed on one side of the slide (2), and one end of the bidirectional threaded rod (24) can be fixedly connected to the output end of the first servo motor (23).

Images