Dispensing device for SMT (Surface Mount Technology)

Abstract

The invention relates to the technical field of dispensing for SMT (surface mount technology), in particular to a dispensing device for SMT, which comprises a workbench, a conveying mechanism arranged on the workbench, a tray for fixing a PCB (printed circuit board) arranged on the conveying mechanism, a turnover mechanism arranged on the workbench, and righting mechanisms symmetrically arranged at two ends of the turnover mechanism and used for righting the tray. Glue dispensing mechanisms for glue dispensing operation are arranged on the two sides of the workbench; according to the double-faced glue dispensing device, continuous conveying of the material disc is achieved through the conveying mechanism, when the material disc reaches a glue dispensing station, a sliding block pushes an extrusion plate to slide along a movable groove, accurate position correction is conducted on the material disc through the extrusion plate, it is ensured that the position of a PCB is stable in the glue dispensing process, then the PCB is rapidly turned over in cooperation with the turnover mechanism, guarantee is provided for double-faced glue dispensing, and the production efficiency is improved. The position accuracy of the PCB in the dispensing process is ensured, poor dispensing caused by position deviation is avoided, and the dispensing precision and the production efficiency are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of glue dispensing for SMT patches, and in particular to a glue dispensing device for SMT patches. Background Art

[0002] SMT patch refers to the abbreviation of a series of process flows based on PCB processing. Among them, PCB is a printed circuit board. Electronic components are directly pasted to the surface of the printed circuit board PCB by manual or machine to improve the integration of the circuit and production efficiency. When the PCB board is turned over and glue is dispensed, the position of the PCB board is easily offset, resulting in a decrease in glue dispensing accuracy.

[0003] In the existing SMT patch process, after each step of operation, the PCB board needs to be manually transferred to the next workstation for operation. The operator can check the PCB status in real time, quickly intercept defective products and adjust process parameters.

[0004] However, in actual use, when the above device is turned over and glue is dispensed on the PCB board, the PCB board is prone to positional deviation, resulting in a decrease in the accuracy of glue dispensing on the back side of the PCB board, thereby affecting the overall quality of the patch. Summary of the Invention

[0005] In response to the above-mentioned shortcomings of the prior art, the present invention provides a dispensing device for SMT patches, which can effectively solve the problem in the prior art that position deviation is easily caused when the PCB board is turned over, resulting in a decrease in the accuracy of dispensing on the back of the PCB board.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a dispensing device for SMT patches, comprising a workbench, a conveying mechanism provided on the workbench, a material tray for fixing a PCB board provided on the conveying mechanism, a turning mechanism provided on the workbench, and straightening mechanisms for straightening the material tray symmetrically provided at both ends of the turning mechanism, and dispensing mechanisms for dispensing glue provided on both sides of the workbench; The straightening mechanism includes a slider, and an end of the slider close to the flipping mechanism is provided with an extrusion plate for supporting the material tray. The top of the workbench is provided with a movable groove for sliding the two ends of the extrusion plate. A limiting rod for limiting the position of the extrusion plate is fixedly installed inside the movable groove, and a reset spring for resetting the extrusion plate is provided on the surface of the limiting rod.

[0007] Furthermore, both ends of the extrusion plate away from the tray are lower than the horizontal end, and an arc-shaped connecting section is provided between the lower end and the horizontal end. The end of the extrusion plate close to the tray is provided with a protrusion that cooperates with the tray.

[0008] Furthermore, the flipping mechanism includes a driving motor fixedly installed at the bottom end of the workbench, a turntable is provided at the output end of the driving motor, a protrusion is provided at the top of the turntable, a movable plate for driving the slider to slide is provided above the turntable, a limiting groove is provided on the surface of the movable plate for cooperating with the protrusion, sliders are fixedly installed at both ends of the movable plate, and a flipping assembly is provided above the movable plate.

[0009] Furthermore, a limiting block for limiting the position of the movable plate is fixedly installed inside the workbench.

[0010] Furthermore, a sliding groove for the slider to slide is provided on the top of the workbench, and a matching groove for the movable plate to slide is provided on the inner wall of the workbench, and the matching groove is communicated with the sliding groove.

[0011] Furthermore, the flip assembly includes a second connecting rod rotatably mounted on the movable plate, the end of the second connecting rod away from the movable plate is rotatably connected to the flip plate, the end of the flip plate away from the second connecting rod is rotatably connected to the first connecting rod, the end of the first connecting rod away from the flip plate is rotatably mounted on the supporting plate, and the supporting plate is fixedly mounted on the inner wall of the workbench.

[0012] Furthermore, the dispensing mechanism includes a dispensing component, and the workbench is provided with a base for supporting the dispensing component.

[0013] Furthermore, a control panel for controlling the movement of the dispensing component is provided on the surface of the base.

[0014] Furthermore, the conveying mechanism includes a rotating motor fixedly mounted on the side wall of the workbench, and an output end of the rotating motor is provided with a transmission wheel, and the transmission wheel is connected to a belt for transmitting the material tray.

[0015] Furthermore, the belts are symmetrically arranged in two groups, and the two adjacent groups of transmission wheels are fixedly connected by a connecting roller.

[0016] Beneficial effects Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: 1. The conveying mechanism realizes the continuous transmission of the material tray. When the material tray arrives at the dispensing station, the slider pushes the extrusion plate to slide along the movable groove. The extrusion plate accurately positions the material tray to ensure the stable position of the PCB board during the dispensing process. The flipping mechanism then cooperates to quickly turn the PCB board over, providing a guarantee for double-sided dispensing and ensuring the accurate position of the PCB board during the dispensing process, avoiding poor dispensing due to position deviation, and effectively improving dispensing accuracy and production efficiency. Second, the low-level end design of the extrusion plate at both ends away from the material tray and the arc-shaped connecting section can reduce the resistance during movement when the slider contacts or separates from the extrusion plate, making the slider slide more smoothly and steadily, avoiding jamming or shaking due to sudden changes in friction, thereby ensuring the accuracy of the positive position operation. At the same time, the reset spring can retract and contract under relatively stable conditions, making its force more uniform, effectively extending the service life of the reset spring. In addition, the limit block fixedly installed inside the workbench can limit the movement trajectory of the movable plate, preventing it from deflecting or shaking during the sliding process, ensuring that the movable plate moves smoothly and accurately along the predetermined path, thereby ensuring the stability of the entire flip mechanism and extending the service life of the equipment. 3. Through the coordinated operation of the conveying mechanism, flipping mechanism, straightening mechanism and dispensing mechanism, and by presetting the program and parameters and the operating speed of the conveying mechanism on the control panel, the glue can be accurately dispensed to the designated position on the PCB board, ensuring the bonding and fixation quality between the electronic components and the PCB board. The flipping mechanism and straightening mechanism accurately complete the flipping and positioning operations during the movement of the tray, and the dispensing mechanism efficiently completes the dispensing and solidifying of the glue during the tray fixing stage. The whole process is highly automated, reducing manual intervention and waiting time, effectively avoiding production interruptions or efficiency reductions caused by poor connection between various links, realizing a continuous and stable production process, and further improving overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of the present invention; Figure 2 This is a schematic diagram of the overall appearance of the dispensing mechanism of the present invention; Figure 3 This is a schematic diagram of the overall appearance of the flip mechanism of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the structure of the extruded plate of the present invention; Figure 6 This is a structural diagram of the device of the present invention in normal use; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 8It is a partial cross-sectional view of the conveying mechanism of the present invention.

[0019] Figure numerals: 1. workbench; 2. conveying mechanism; 201. rotating motor; 202. connecting roller; 203. transmission wheel; 204. belt; 3. dispensing mechanism; 301. base; 302. dispensing part; 303. control panel; 4. flipping mechanism; 401. driving motor; 402. turntable; 403. protrusion; 404. movable plate; 405. limiting groove; 406. limiting block; 407. bearing plate; 408. first connecting rod; 409. second connecting rod; 410. flipping plate; 5. straightening mechanism; 501. matching groove; 502. slider; 503. sliding groove; 504. movable groove; 505. limiting rod; 506. reset spring; 507. extrusion plate; 6. material tray. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to the embodiments.

[0022] A dispensing device for SMT patch, see attached Figure 1-8 , including a workbench 1, a conveying mechanism 2 is provided on the workbench 1, a material tray 6 for fixing the PCB board is provided on the conveying mechanism 2, a turning mechanism 4 is provided on the workbench 1, and a straightening mechanism 5 for straightening the material tray 6 is symmetrically provided at both ends of the turning mechanism 4, and a dispensing mechanism 3 for dispensing operation is provided on both sides of the workbench 1, wherein the turning mechanism 4 is used to provide a power source for the straightening mechanism 5; The straightening mechanism 5 includes a slider 502, and the end of the slider 502 close to the flipping mechanism 4 is provided with an extrusion plate 507 for supporting the material tray 6. The top of the workbench 1 is provided with a movable groove 504 for sliding the two ends of the extrusion plate 507. A limiting rod 505 for limiting the extrusion plate 507 is fixedly installed inside the movable groove 504, and a reset spring 506 for resetting the extrusion plate 507 is provided on the surface of the limiting rod 505.

[0023] Furthermore, the two ends of the extrusion plate 507 on the side away from the material tray 6 are lower than the horizontal end, and the low end and the horizontal end are provided with an arc-shaped connecting section. The end of the extrusion plate 507 close to the material tray 6 is provided with a protrusion that cooperates with the material tray 6. When the slider 502 contacts the horizontal end of the extrusion plate 507, the extrusion plate 507 slides in the movable groove 504 and the material tray 6 is corrected. The low horizontal end design and the arc-shaped connecting section at both ends of the extrusion plate 507 on the side away from the material tray 6 can reduce the resistance during the movement when the slider 502 contacts or separates from the extrusion plate 507, making the sliding of the slider 502 smoother and more stable, avoiding jamming or shaking due to sudden changes in friction, thereby ensuring the accuracy of the correction operation. At the same time, the reset spring 506 can expand and contract under relatively stable conditions, making its force more uniform, thereby effectively extending the service life of the reset spring 506.

[0024] In the above technical solution, the PCB to be processed is fixed by the material tray 6, and the material tray 6 is sequentially conveyed to the first and second glue dispensing stations by the conveying mechanism 2. The material tray 6 is then straightened by the straightening mechanism, and the PCB is glued and solidified by the glue dispensing mechanism 3. Specifically, the flipping mechanism provides power for the slider 502, wherein the initial position of the slider 502 is located at one end of the extrusion plate 507. When the slider 502 starts to slide and passes through the arc section of the extrusion plate 507, the slider 50 2 pushes the extrusion plate 507 to slide toward the inner side of the workbench 1. During this process, the return spring 506 is compressed and deformed to realize the correct position of the material tray 6. The entire horizontal section of the extrusion plate 507 provides the dispensing mechanism 3 with dispensing time. When the slider 502 slides to the other end of the arc section of the extrusion plate 507, the return spring 506 begins to rebound and pushes the extrusion plate 507 to return to its original position. When the slider 502 releases the contact between the extrusion plate 507 and the material tray 6, the material tray 6 is smoothly transported to the subsequent workstation under the conveying mechanism 2.

[0025] Furthermore, the flipping mechanism 4 includes a driving motor 401 fixedly mounted on the bottom end of the workbench 1, a turntable 402 is provided at the output end of the driving motor 401, a protrusion 403 is provided on the top of the turntable 402, and a movable plate 404 for driving the slider 502 to slide is provided above the turntable 402, and a limiting groove 405 is provided on the surface of the movable plate 404 to cooperate with the protrusion 403, and sliders 502 are fixedly mounted on both ends of the movable plate 404. A flipping assembly is provided above the movable plate 404, and the rotation of the turntable 402 causes the protrusion 403 to rotate synchronously. At the same time, the cooperation between the protrusion 403 and the limiting groove 405 causes the movable plate 404 to perform reciprocating linear motion in the horizontal direction. During the whole process, the movable plate 404 first slides, then remains stationary, and finally resets to achieve the flipping of the PCB board.

[0026] Among them, a limit block 406 for limiting the movable plate 404 is fixedly installed inside the workbench 1. During the operation of the flipping mechanism 4, the movable plate 404 slides and performs other actions driven by the driving motor 401. The limit block 406 can limit the moving trajectory of the movable plate 404 to prevent it from deflecting or shaking during the sliding process, ensuring that the movable plate 404 moves smoothly and accurately along the predetermined path, thereby ensuring the stability of the operation of the entire flipping mechanism 4.

[0027] It is worth noting that a sliding groove 503 for the slider 502 to slide is provided on the top of the workbench 1, and a matching groove 501 for the movable plate 404 to slide is provided on the inner wall of the workbench 1, and the matching groove 501 is connected to the sliding groove 503. The slider 502 can slide in the sliding groove 503 under the drive of the movable plate 404, thereby driving the extrusion plate 507 to move, thereby realizing the straightening operation of the material tray 6.

[0028] Furthermore, the flip assembly includes a second connecting rod 409 rotatably mounted on the movable plate 404, the end of the second connecting rod 409 away from the movable plate 404 is rotatably connected to the flip plate 410, the end of the flip plate 410 away from the second connecting rod 409 is rotatably connected to the first connecting rod 408, the end of the first connecting rod 408 away from the flip plate 410 is rotatably mounted on the supporting plate 407, and the supporting plate 407 is fixedly mounted on the inner wall of the workbench 1. When the movable plate 404 slides, since the second connecting rod 409 is rotatably mounted on the movable plate 404, the movement of the movable plate 404 will pull the second connecting rod 409 The second connecting rod 409 is rotatably connected to the flip plate 410, thereby driving the flip plate 410 to move. At the same time, the other end of the flip plate 410 is rotatably connected to the supporting plate 407 fixed on the inner wall of the workbench 1 through the first connecting rod 408, so that the flip plate 410 rotates during the movement, thereby realizing the flipping action of the material tray 6. When the movable plate 404 is reset, the flip plate 410 is also reset to prepare for the flipping of the next group of PCB boards. Among them, the material tray 6 is preferably a clip-on part, and the PCB board is inserted in the material tray 6. The upper plate surface of the material tray 6 is made of soft material, which is used to reduce the vibration generated when the material tray 6 is flipped.

[0029] In the above technical solution, after the material tray 6 carrying the PCB board passes through the first glue dispensing station, while the material tray 6 passes through the flipping mechanism 4, another group of material trays 6 arrives at the first glue dispensing station. When the first group of material trays 6 smoothly reaches the second glue dispensing station, the adjacent group of material trays 6 are flipped over to the flipping plate 410. Specifically, the driving motor 401 drives the turntable 402 to rotate through the output shaft. Due to the cooperation between the protrusion 403 and the limiting groove 405, the movable plate 404 performs reciprocating linear motion in the horizontal direction while the protrusion 403 moves from one end point to the other end point of the limiting groove 405. During the whole process, the rotating disk 402 always keeps rotating. After the rotating disk 402 rotates to a certain angle, the movable plate 404 has a certain pause time, thereby providing time for glue dispensing and solidifying operations. Then, after turning to another angle, the movable plate 404 slides in the opposite direction to prepare for the flipping of the next PCB board.

[0030] Furthermore, the dispensing mechanism 3 includes a dispensing component 302 , and a base 301 for supporting the dispensing component 302 is provided on the workbench 1 , wherein the base 301 adopts different installation methods according to actual needs, and a fixed installation method is adopted here.

[0031] Furthermore, a control panel 303 for controlling the movement of a dispensing member 302 is provided on the surface of the base 301. By presetting the program and parameters of the control panel 303 and accurately applying the glue to a designated position on the PCB board through the dispensing member 302, bonding and fixation between the electronic components and the PCB board are achieved. The glue is preferably UV-curing acrylic glue. Under the irradiation of an ultraviolet lamp, the photoinitiator in the glue absorbs light energy to generate free radicals, which trigger polymerization reactions between the monomers and prepolymers in the glue, greatly shortening the curing time, thereby achieving rapid curing and effectively improving production efficiency.

[0032] Specifically, the conveying mechanism 2 includes a rotating motor 201 fixedly mounted on the side wall of the workbench 1, and a transmission wheel 203 is provided at the output end of the rotating motor 201. The transmission wheel 203 is connected to a belt 204 for transmitting the material tray 6. The conveying mechanism 2 realizes the automatic transmission of the material tray 6. Specifically, the transmission wheel 203 is driven to rotate by the rotating motor 201, thereby driving the belt 204 to move, and the material tray 6 placed on the belt 204 is transported from one dispensing station to the next dispensing station, and then from the dispensing station to the subsequent station, thereby realizing a continuous production process.

[0033] Furthermore, two groups of belts 204 are symmetrically arranged, and the two adjacent groups of transmission wheels 203 are fixedly connected by a connecting roller 202. The connecting roller 202 ensures that the two groups of belts 204 always maintain the same operating speed, thereby avoiding the material tray 6 from tilting, offsetting, etc. during the transmission process due to inconsistent operating speeds of the belts 204 on both sides. Among them, the size of the material tray 6 is larger than the spacing between the two groups of belts 204, and smaller than the spacing between the two symmetrical baffles set at the top of the workbench 1. The two groups of baffles are used to prevent the material tray from falling onto the workbench 1 during the flipping process and cannot be normally transported to the second dispensing station, thereby further improving the overall stability of the device.

[0034] In the above technical solution, the transmission wheel 203 is driven to rotate by rotating the motor 201, thereby driving the belt 204 to move, so that the material tray 6 placed on the belt 204 can move on the workbench 1 according to a predetermined path and speed, and the material tray 6 carrying the PCB board is transported to the first dispensing station and the second dispensing station in turn, and the dispensing part 302 performs dispensing and solidifying treatment on the PCB board, thereby realizing the automatic transmission of the material tray 6 and ensuring continuous and efficient production.

[0035] Working principle: When in use, the rotating motor 201 drives the transmission wheel 203 to rotate, and the connecting roller 202 drives the two symmetrical groups of belts 204 to smoothly transport the material tray 6 carrying the PCB board to the first dispensing station, the flip plate 410, and the second dispensing station in turn. At the same time, the driving motor 401 drives the turntable 402 to rotate, and the protrusion 403 cooperates with the limit groove 405 to make the movable plate 404 reciprocate linearly. During the entire sliding process of the movable plate 404, the slider 502 first pushes the arc section of one end of the extrusion plate 507 to slide toward the inside of the workbench 1 and compress the reset spring 506, and the material tray 6 is corrected by the protruding end of the extrusion plate 507. At the same time, the movable plate 404 moves through the second connecting rod 409, the flip plate 410 and the first connecting rod 408 drives the flip plate 410 to rotate, so that the material tray 6 carrying the PCB board is turned over. After the movable plate 404 slides to a certain angle, the movable plate 404 stops, and the horizontal section of the extrusion plate 507, the material tray 6 is always fixed, providing time for dispensing and solidifying operations. Among them, the reset spring 506 pushes the slider 502 to reset after it disengages from the extrusion plate 507, and cooperates with the dispensing mechanism 3 to realize the entire dispensing operation, and the base 301 carries the dispensing part 302. The program and parameters are preset through the control panel 303, so that the dispensing part 302 can be accurately dispensed, and the glue is preferably UV-curing acrylic glue, which is quickly cured under ultraviolet light to improve production efficiency. After the material tray 6 completes dispensing and turning over, it continues to be transported to the subsequent workstation by the belt 204 to realize continuous production.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A dispensing device for SMT patch, comprising a workbench (1), characterized in that: The workbench (1) is provided with a conveying mechanism (2), a material tray (6) for fixing a PCB board is provided on the conveying mechanism (2), a turning mechanism (4) is provided on the workbench (1), and straightening mechanisms (5) for straightening the material tray (6) are symmetrically provided at both ends of the turning mechanism (4), and glue dispensing mechanisms (3) for glue dispensing operations are provided on both sides of the workbench (1); The straightening mechanism (5) comprises a slider (502), an end of the slider (502) close to the turning mechanism (4) is provided with an extrusion plate (507) for supporting the material tray (6), a top end of the workbench (1) is provided with a movable groove (504) for sliding the two ends of the extrusion plate (507), a limiting rod (505) for limiting the position of the extrusion plate (507) is fixedly installed inside the movable groove (504), and a return spring (506) for returning the extrusion plate (507) is sleeved on the surface of the limiting rod (505).

2. The SMT patch dispensing device according to claim 1, characterized in that: The two ends of the extrusion plate (507) on the side away from the material tray (6) are lower than the horizontal end, and the lower end and the horizontal end are provided with an arc-shaped connecting section. The end of the extrusion plate (507) close to the material tray (6) is provided with a protrusion that cooperates with the material tray (6).

3. The SMT patch dispensing device according to claim 1, characterized in that: The flipping mechanism (4) comprises a driving motor (401) fixedly mounted at the bottom end of the workbench (1); a turntable (402) is provided at the output end of the driving motor (401); a protrusion (403) is provided at the top end of the turntable (402); a movable plate (404) for driving a slider (502) to slide is provided above the turntable (402); a limiting groove (405) cooperating with the protrusion (403) is provided on the surface of the movable plate (404); sliders (502) are fixedly mounted at both ends of the movable plate (404); and a flipping assembly is provided above the movable plate (404).

4. The SMT patch dispensing device according to claim 3, characterized in that: A limiting block (406) for limiting the position of the movable plate (404) is fixedly installed inside the workbench (1).

5. The SMT patch dispensing device according to claim 3, characterized in that: The top of the workbench (1) is provided with a sliding groove (503) for the slider (502) to slide, and the inner wall of the workbench (1) is provided with a matching groove (501) for the movable plate (404) to slide, and the matching groove (501) is communicated with the sliding groove (503).

6. The SMT patch dispensing device according to claim 3, characterized in that: The flip assembly includes a second connecting rod (409) rotatably mounted on the movable plate (404), an end of the second connecting rod (409) away from the movable plate (404) is rotatably connected to the flip plate (410), an end of the flip plate (410) away from the second connecting rod (409) is rotatably connected to the first connecting rod (408), an end of the first connecting rod (408) away from the flip plate (410) is rotatably mounted on the supporting plate (407), and the supporting plate (407) is fixedly mounted on the inner wall of the workbench (1).

7. The SMT patch dispensing device according to claim 1, characterized in that: The glue dispensing mechanism (3) comprises a glue dispensing component (302), and a base (301) for carrying the glue dispensing component (302) is provided on the workbench (1).

8. The SMT patch dispensing device according to claim 7, characterized in that: A control panel (303) for controlling the movement of the dispensing member (302) is provided on the surface of the base (301).

9. The SMT patch dispensing device according to claim 1, characterized in that: The conveying mechanism (2) comprises a rotating motor (201) fixedly mounted on a side wall of the workbench (1); an output end of the rotating motor (201) is provided with a transmission wheel (203); and the transmission wheel (203) is connected in driving connection to a belt (204) for transmitting the material tray (6).

10. The SMT dispensing device according to claim 9, characterized in that: The belts (204) are symmetrically arranged in two groups, and the two adjacent groups of transmission wheels (203) are fixedly connected via a connecting roller (202).

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