Automatic paint spraying device for signboard

Abstract

The invention relates to the technical field of signboard production and processing, and provides an automatic signboard paint spraying device which comprises a conveying mechanism, a storage mechanism, a feeding mechanism, a paint spraying mechanism, a discharging mechanism and a drying mechanism. The conveying mechanism comprises a linear module, the linear module comprises a sliding table, a coating net rack is arranged on the sliding table in a supporting mode, and the coating net rack is used for containing signboards; the storage mechanism is used for storing signboards to be painted; the feeding mechanism is used for transferring the signboards located at the storage mechanism to the coating net rack; the paint spraying mechanism is used for spraying paint on the signboards located on the coating net rack; the discharging mechanism is used for transferring the signboards located on the coating net rack to the drying mechanism. And the drying mechanism is used for drying the signboard paint layer. The signboard paint spraying device has the effect of improving the signboard paint spraying efficiency.

Description

Technical Field

[0001] The present application relates to the field of production and processing of identification plates, and in particular to an automatic painting device for identification plates. Background Art

[0002] Signs are widely used in large supermarkets, public toilets, transportation facilities and other places. They usually have corresponding patterns and texts on the surface to indicate the corresponding information.

[0003] In the related art, during the production process of metal signboards, according to the production process requirements, a layer of paint needs to be sprayed on the surface to improve the overall appearance and recognition of the signboard while enhancing the overall corrosion resistance of the signboard.

[0004] At present, the spraying of the paint layer on the signboard is mainly done manually, specifically, the relevant operator sprays the corresponding paint onto the surface of the signboard with a handheld spray gun.

[0005] Regarding the above-mentioned related technologies, on the one hand, the overall efficiency of manual painting is low, and the spraying quality is affected by the operator's proficiency, and the spraying quality is relatively unstable; on the other hand, paints usually contain various volatile organic compounds, which can easily cause certain health risks to the human body; therefore, there is room for improvement. Summary of the invention

[0006] In order to improve the spraying efficiency of the paint layer on the surface of the signboard, the present application provides an automatic painting device for the signboard.

[0007] The present application provides an automatic spray painting device for signboards, which adopts the following technical solution: An automatic painting device for a signboard, comprising a conveying mechanism, a storage mechanism, a feeding mechanism, a painting mechanism, a discharging mechanism and a drying mechanism; The conveying mechanism includes a linear module, the linear module includes a slide, a painting grid is supported on the slide, and the painting grid is used to place the identification plate; The storage mechanism and the feeding mechanism are both located near the starting end of the linear module, the storage mechanism is used to store the identification plate to be painted; the feeding mechanism is used to transfer the identification plate located at the storage mechanism to the painting grid; The paint spraying mechanism is arranged close to the linear module, and is used to spray paint on the identification plate located on the painting grid; The unloading mechanism and the drying mechanism are both arranged near the end of the linear module; the unloading mechanism is used to transfer the identification plate located on the coating grid to the drying mechanism; the drying mechanism is used to dry the paint layer of the identification plate.

[0008] By adopting the above technical scheme, when the signboard is spray-painted, the linear module drives its own slide to move to the starting end, and then the loading mechanism transfers the signboard at the storage mechanism to the painting grid on the slide, and then the linear module drives the slide to drive the signboard to move to the painting mechanism, and then the painting mechanism sprays the signboard on the painting grid, and then the linear module drives the slide to drive the painted signboard to move to the discharge of the linear module, and the unloading mechanism transfers the painted signboard on the painting grid to the drying mechanism, and the drying mechanism realizes the drying of the paint layer on the surface of the signboard; no manual intervention is required throughout the process, and the steps of automatic painting of the signboard and drying of the paint layer are realized, which effectively improves the overall operation efficiency compared with the traditional method of manually spraying the paint layer, and at the same time reduces a series of health risks brought to the operators by spraying paint.

[0009] Preferably, the feeding mechanism includes a first manipulator, the driving end of which is connected to a grabbing portion for grabbing the identification plate; the painting mechanism includes a second manipulator, the driving end of which is connected to a paint spray gun; the unloading mechanism includes a third manipulator, the driving end of which is connected to a clamping portion for clamping the identification plate.

[0010] By adopting the above technical scheme, when loading, the first manipulator can cooperate with the grasping part to grasp the identification plate in the storage part and transfer it to the coating grid on the linear module; when painting the identification plate, the second manipulator can cooperate with the paint spray gun to evenly spray the paint on the surface of the identification plate; when unloading, the third manipulator can clamp the painted identification plate on the coating grid through the grasping part and transfer it to the drying mechanism.

[0011] Preferably, a cleaning component is also supported on the linear module, and the cleaning component is arranged near the starting end of the linear module. The cleaning component includes a cleaning air knife, and the cleaning air knife is supported above the moving path of the slide, and the cleaning air knife is arranged toward the linear module.

[0012] By adopting the above technical solution and setting up the cleaning component, in the subsequent process in which the linear module drives the slide to drive the painting grid and the sign to be painted to move toward the painting mechanism, a cleaning air knife is used to blow compressed air toward the sign on the painting grid to blow away dust and impurities adhering to the surface of the sign, thereby cleaning the surface of the sign and reducing the occurrence of pinholes in the sprayed paint layer due to the presence of dust and impurities.

[0013] Preferably, a limit assembly is provided on the slide corresponding to the identification plate, and the limit assembly includes a limit bracket and a lifting drive component, the limit bracket is connected to a plurality of limit suction cups, the limit suction cups are arranged vertically upward, the lifting drive component is drivingly connected to the limit bracket, and the lifting drive component is used to drive the limit bracket to move up and down, so as to drive the limit suction cups to pass through the coating grid.

[0014] By adopting the above technical solution, the lifting drive member is used to drive the limit bracket to move upward, so that the limit suction cup abuts against the bottom of the sign on the painting grid, and the sign is held and fixed by the limit suction cup, so that the sign is temporarily fixed on the painting grid, thereby reducing the displacement of the sign due to the compressed air blown out by the cleaning air knife when passing under the cleaning air knife.

[0015] Preferably, when the first manipulator grabs the identification plate through the grabbing part and places it on the painting grid, the lifting drive drives the limiting bracket to drive the limiting suction cup to move upward until the limiting suction cup abuts against the bottom of the identification plate on the painting grid.

[0016] By adopting the above technical solution, the first manipulator is used in cooperation with the grasping part to make the signboard firmly adhere to the painting grid, thereby reducing the signboard on the painting grid being pushed off the painting grid by the limiting suction cup due to the upward movement of the limiting suction cup, which is conducive to making the limiting suction cup better abut against the bottom of the signboard, thereby allowing the limiting suction cup to better hold and fix the signboard.

[0017] Preferably, the clamping portion comprises a finger cylinder, and two clamping blocks of the finger cylinder are connected with clamping plates, and the two clamping plates are arranged opposite to each other.

[0018] By adopting the above technical solution, when the third manipulator clamps the identification plate through the clamping part, after driving the two clamping plates of the clamping part to move to the opposite sides of the target identification plate respectively, the two clamping plates are driven to approach each other through the finger cylinder until the two clamping plates are respectively in contact with the opposite sides of the identification plate, thereby achieving the clamping and fixing of the identification plate.

[0019] Preferably, before the third manipulator clamps the identification plate on the painting grid through the clamping part, the lifting drive member drives the limiting bracket to drive the limiting suction cup to move upward until the limiting suction cup pushes the identification plate away from the painting grid.

[0020] By adopting the above technical solution, when the sign is attached to the painting grid, the painting grid is very likely to interfere with the clamping part, and under the influence of the sprayed paint, the sign is easily adhered to the painting grid by the paint, resulting in the clamping part not being able to clamp the sign easily; the lifting drive member is used to drive the limit bracket to drive the limit suction cup to move upward to push the sign upward from the painting grid. On the one hand, the effective separation between the sign and the painting grid is achieved, and on the other hand, when the sign is subsequently clamped by the clamping part, the interference of the painting grid with the clamping part can be avoided, so that the clamping part can better clamp and fix the sign.

[0021] Preferably, it further comprises a water curtain cabinet, wherein the water curtain cabinet and the paint spraying mechanism are located on opposite sides of the linear module.

[0022] By adopting the above technical solution and setting up a water curtain cabinet, when the second manipulator sprays paint on the signboard through a paint spray gun, the excess paint mist can be absorbed in time by the water curtain cabinet to reduce the pollution caused by the paint mist entering the air.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. After the signboard at the storage mechanism is transferred to the coating grid on the linear module slide by the feeding mechanism, the linear module drives the slide to drive the coating grid to move to the painting mechanism, and the painting mechanism sprays the paint layer on the signboard on the coating grid. After the spraying is completed, the unloading mechanism transfers it from the coating grid to the drying mechanism, and the drying mechanism dries the paint layer of the signboard, realizing automatic painting and drying of the paint layer of the signboard without manual intervention, effectively improving the overall operation efficiency.

[0024] 2. By setting a cleaning component near the starting end of the linear module, when the linear module drives the slide to move the coating grid and the sign to the paint spraying mechanism, the cleaning air knife at the cleaning component blows compressed air toward the sign at the coating grid to clean the surface of the sign, so that the subsequent paint can be more firmly attached to the surface of the sign.

[0025] 3. Through the setting of the upper limit assembly on the slide, when the feeding mechanism transfers the identification plate to the coating grid, the lifting drive component drives the limiting bracket to move upward until the limiting suction cup on the limiting bracket abuts against the bottom of the identification plate, and the identification plate is fixed by the limiting suction cup to achieve the limitation of the identification plate, which is beneficial to limit the displacement of the identification plate on the subsequent coating grid due to the compressed air blown by the cleaning air knife. At the same time, before the third manipulator of the unloading mechanism clamps the identification plate through the clamping part, the lifting drive component can be used to drive the limiting suction cup to move further upward to push the identification plate upward away from the coating grid, so that the clamping part can better clamp the identification plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an automatic painting device used in an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram used to illustrate the conveying mechanism in an embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the storage mechanism and the feeding structure used in the embodiment of the present application.

[0029] Figure 4 It is a schematic diagram used to illustrate the limit limit assembly in an embodiment of the present application.

[0030] Figure 5 It is a schematic diagram used to illustrate a paint spraying mechanism in an embodiment of the present application.

[0031] Figure 6 It is a schematic diagram used to illustrate the unloading mechanism in the embodiment of the present application.

[0032] Figure 7 yes Figure 6 Enlarged schematic diagram of part A in the middle.

[0033] Figure 8 It is a schematic diagram of an embodiment of the present application used to illustrate the state in which the lifting drive component drives the limiting suction cup to lift the identification plate away from the painting grid.

[0034] Description of reference numerals: 1. Conveying mechanism; 10. Cleaning component; 101. Cleaning air knife; 102. Connecting bracket; 11. Linear module; 12. Slide; 13. Painting grid; 14. Limiting component; 141. Limiting bracket; 142. Limiting suction cup; 143. Lifting drive; 2. Storage mechanism; 21. Support; 22. Support plate; 23. Limiting rod; 3. Loading mechanism; 31. First manipulator; 32. Grasping part; 321. Grasping bracket; 322. Grasping suction cup; 4. Painting mechanism; 41. Second manipulator; 42. Paint spray gun; 5. Unloading mechanism; 51. Third manipulator; 52. Clamping part; 520. Finger cylinder; 521. Clamping plate; 5211. Connecting part; 522. Lifting part; 6. Drying mechanism; 7. Water curtain cabinet. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-8 This application is described in further detail.

[0036] The present application embodiment discloses an automatic painting device for a sign, referring to Figure 1 and Figure 2, including a conveying mechanism 1, a storage mechanism 2, a feeding mechanism 3, a painting mechanism 4, a feeding mechanism 5 and a drying mechanism 6; the conveying mechanism 1 includes a linear module 11, the linear module 11 includes a slide 12, and a painting grid 13 for placing the identification plate is supported on the slide 12; the storage mechanism 2 is used to store the identification plate to be painted; the feeding mechanism 3 is used to transfer the identification plate located on the storage mechanism 2 to the painting grid 13; the spraying mechanism is arranged close to the linear module 11, and is used to paint the identification plate located on the painting grid 13; the feeding mechanism 5 is used to transfer the identification plate located on the painting grid 13 to the drying mechanism 6; the drying mechanism 6 is used to dry the paint on the surface of the identification plate.

[0037] In this embodiment, the linear module 11 adopts an electric screw linear module 11. Both ends of the slide 12 are connected with bellows (not shown in the figure); the end of the bellows away from the slide 12 is connected to the frame end of the linear module 11; the setting of the bellows is conducive to limiting the paint sprayed by the subsequent painting mechanism 4 from contaminating the transmission components of the linear module 11.

[0038] Reference Figure 1 and Figure 3 Both the storage mechanism 2 and the feeding mechanism 3 are arranged near the starting end of the linear module 11. The storage mechanism 2 includes a support 21, and the support 21 is provided with a plurality of storage parts for storing identification plates. The storage parts include a support plate 22, and a plurality of limit rods 23 are vertically welded on the outer periphery of the support plate 22. When the identification plates are stored in the storage parts, the identification plates are stacked on the support plate 22, and the limit rods 23 are used to limit the staggering of adjacent identification plates, which is beneficial to the overall stacking of the identification plates.

[0039] The transfer mechanism includes a first manipulator 31 and a gripping unit 32. In this embodiment, the first manipulator 31 is a five-axis manipulator. The gripping unit 32 is connected to the driving end of the first manipulator 31 to grip the identification plate. The gripping unit 32 includes a gripping bracket 321, on which a plurality of gripping suction cups 322 are mounted. The gripping suction cups 322 are arranged away from the first manipulator 31, and the plurality of gripping suction cups 322 are connected to an air source.

[0040] When the identification plate is transferred to the coating grid 13 on the linear control group slide 12 by the transfer mechanism, the linear module 11 drives the slide 12 to move to the starting end of the linear module 11; then the first manipulator 31 grabs the identification plate located on the storage part of the storage mechanism 2 through the grabbing suction cup 322 of the grabbing part 32 and moves it to the coating grid 13.

[0041] Reference Figure 1 and Figure 2The linear module 11 is also provided with a cleaning assembly 10, which is arranged near the starting end of the linear module 11. The cleaning assembly 10 includes a cleaning air knife 101; the cleaning air knife 101 is supported above the moving path of the slide 12 of the linear module 11 through a connecting bracket 102, and the cleaning air knife 101 is arranged toward the linear module 11, and the cleaning air knife 101 is connected to the air source.

[0042] Through the setting of the cleaning component 10, in the process of the linear module 11 driving the slide 12 to drive the painting grid 13 and the sign to be painted to move toward the paint spraying mechanism 4, the cleaning wind knife 101 blows compressed air toward the sign located on the painting grid 13 to blow away the remaining dust and debris on the surface of the sign, thereby reducing the possibility of pinholes in the paint layer on the surface of the sign due to the presence of dust and debris, which is conducive to the subsequent sprayed paint layer to better adhere to the surface of the sign.

[0043] Reference Figure 2 and Figure 3 , a plurality of legs are vertically connected downwardly to the outer periphery of the painting grid 13, and one end of the leg away from the painting grid 13 is connected to the slide 12, so that the painting grid 13 is stably supported above the slide 12 of the linear module 11. A limit assembly 14 is provided on the slide 12 corresponding to the identification plate; the limit assembly 14 is located below the painting grid 13; the limit assembly 14 includes a limit bracket 141 and a lifting drive 143, and both ends of the limit bracket 141 are vertically installed with limit suction cups 142, and the limit suction cups 142 are connected to the air source. The lifting drive 143 is drivingly connected to the limit bracket 141, and is used to drive the limit bracket 141 to rise and fall, so as to drive the two limit suction cups 142 to penetrate the painting grid 13. In this embodiment, the lifting drive 143 adopts a cylinder.

[0044] When the first manipulator 31 grabs the sign to be painted through the grabbing part 32 and places it on the painting grid 13, the lifting drive 143 drives the limiting bracket 141 to drive the two limiting suction cups 142 to move up and penetrate the painting grid 13 until the two limiting suction cups 142 abut against the bottom of the sign located on the painting grid 13, and then the sign is adsorbed and fixed by the two limiting suction cups 142 to achieve temporary fixation of the sign on the painting grid 13, which is beneficial to limit the displacement of the sign when the subsequent cleaning air knife 101 flushes the sign located on the painting grid 13.

[0045] When the first manipulator 31 grabs the identification plate through the grabbing part 32 and places it on the coating grid 13, the lifting drive part 143 drives the limiting bracket 141 to drive the limiting suction cup 142 to move upward and abut against the bottom of the identification plate. On the one hand, the first manipulator 31 can cooperate with the grabbing part 32 to temporarily limit the identification plate so that the identification plate fits tightly on the coating grid 13 and limits the upward movement of the identification plate. When the lifting drive part 143 drives the limiting suction cup 142 to move upward, the limiting suction cup 142 can abut against the bottom of the identification plate more firmly, which is conducive to the limiting suction cup 142 to better adsorb and fix the identification plate.

[0046] Reference Figure 1 and Figure 5 The paint spraying mechanism 4 includes a second manipulator 41 and a paint spray gun 42; in this embodiment, the second manipulator 41 is a five-axis manipulator. The paint spray gun 42 is installed and connected to the driving end of the second manipulator 41. When the linear module 11 drives the slide 12 to drive the painting grid 13 and the sign to move close to the paint spraying mechanism 4, the second manipulator 41 cooperates with the paint spray gun 42 to evenly spray the paint onto the surface of the sign on the painting grid 13.

[0047] A water curtain cabinet 7 is also provided on the outside of the linear module 11; the water curtain cabinet 7 and the paint spraying mechanism 4 are respectively located on the opposite sides of the linear module 11, and the water curtain cabinet 7 and the paint spraying mechanism 4 are arranged opposite to each other. When the paint is sprayed onto the surface of the signboard through the second manipulator 41 and the paint spray gun 42, the water curtain cabinet 7 can absorb the excess paint mist in time, which is beneficial to reduce the situation where the paint mist pollutes the air.

[0048] Reference Figure 1 and Figure 6 The unloading mechanism 5 is arranged near the end of the linear module 11, and the unloading mechanism 5 comprises a third manipulator 51 and a clamping part 52; the clamping part 52 is connected to the driving end of the third manipulator 51, and is used to clamp the identification plate. In this embodiment, the third manipulator 51 is a five-axis manipulator.

[0049] Reference Figure 6 and Figure 7 The clamping part 52 includes a finger cylinder 520 and two clamping plates 521. The finger cylinder 520 is connected to the driving end of the third manipulator 51 through a connecting seat. The two clamping plates 521 are respectively connected to the two clamping blocks of the finger cylinder 520 through a connecting part 5211. The two clamping plates 521 are arranged opposite to each other. The ends of the clamping plates 521 away from the finger cylinder 520 are bent to form a lifting part 522. The lifting parts 522 of the two clamping plates 521 are arranged opposite to each other.

[0050] Reference Figure 4 , Figure 7 and Figure 8When the identification plate on the coating grid 13 is transferred to the drying mechanism 6 through the unloading mechanism 5, the linear module 11 first drives the slide 12 to drive the coating grid 13 and the identification plate to move to the end of the linear module 11; then the lifting drive member 143 at the limiting assembly 14 of the slide 12 drives the limiting bracket 141 to drive the two limiting suction cups 142 to move further upward until the identification plate on the coating grid 13 is lifted off the coating grid 13; then the third manipulator 51 drives the clamping part 52 to move to the identification plate The two clamping plates 521 are located above the identification plate, and are respectively located on the opposite sides of the identification plate. The finger cylinder 520 drives the two clamping plates 521 to approach each other until the two clamping plates 521 are respectively in contact with the two sides of the target identification plate to complete the clamping of the identification plate by the holding part; finally, the third manipulator 51 drives the clamping part 52 to move the clamped identification plate to the drying mechanism 6, and the finger cylinder 520 drives the two clamping plates 521 to move away from each other to release the clamping part 52 from clamping the identification plate.

[0051] By setting the lifting portion 522 at the end of the clamping plate 521, when the identification plate is clamped by the two clamping plates 521, the lifting portions 522 of the two clamping plates 521 are located at the bottom of the clamped identification plate. The lifting portions 522 of the two clamping plates 521 are used to cooperate to provide auxiliary support and limit the identification plate, which is beneficial for the clamping portion 52 to clamp the identification plate more firmly.

[0052] The lifting drive 143 is used to drive the limit bracket 141 to drive the two limit suction cups 142 to push the identification plate upward off the painting grid 13. This helps to reduce the interference between the painting grid 13 and the clamping plate 521 and the bent portion of the clamping plate 521 when the identification plate on the painting grid 13 is clamped by the clamping part 52, thereby facilitating the clamping part 52 to better clamp the identification plate.

[0053] In this embodiment, the drying mechanism 6 includes a belt dryer, and an input end of the belt dryer is arranged close to the third manipulator 51 .

[0054] The implementation principle of the embodiment of the present application is that when the signboard is sprayed with paint by the signboard automatic spraying device, the following steps are included: S1: The painting support is in place: the linear module 11 drives the slide 12 to drive the painting grid 13 to move to the starting end of the linear module 11; S2: Loading the sign: The first manipulator 31 grabs the sign at the storage mechanism 2 through the grabbing part 32 and moves it to the coating grid 13; the lifting driving member 143 at the limit assembly 14 of the slide 12 drives the limit suction cup 142 to move up, and after it abuts against the bottom of the sign, the limit suction cup 142 adsorbs and fixes the sign; then the grabbing part 32 releases the grabbing of the sign; S3: Cleaning the sign: The linear module 11 drives the slide 12 to drive the coating grid 13 and the sign to move toward the paint spraying mechanism 4, during which the dust and debris on the surface of the sign are washed away by the cleaning air knife 101; S4: Painting of the sign: After the linear module 11 drives the slide 12 to move the painting grid 13 and the sign to the painting mechanism 4, the second manipulator 41 cooperates with the paint spray gun 42 to spray the paint onto the surface of the sign; S5: Transfer of the identification plate: the linear module 11 drives the slide 12 to drive the coating grid 13 and the identification plate to the driving end of the linear module 11; the lifting drive 143 at the limiting assembly 14 of the slide 12 drives the limiting suction cup 142 to move up further until the limiting suction cup 142 pushes the identification plate away from the coating grid 13; after the third manipulator 51 clamps the identification plate through the clamping part 52, the limiting suction cup 142 releases the clamping of the identification plate; after the third manipulator 51 drives the clamping part 52 to transfer the clamped identification plate to the input end of the belt dryer, the clamping part 52 releases the clamping of the identification plate.

[0055] S6: Signboard drying: The paint layer on the surface of the signboard is dried by a belt dryer.

[0056] The present application can realize automatic spray painting of signboards, and the whole operation process does not require human intervention, which effectively improves the efficiency of spray painting of signboards while reducing health risks that are easily caused during the painting process.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic spray painting device for a sign, characterized in that: It comprises a conveying mechanism (1), a storage mechanism (2), a loading mechanism (3), a painting mechanism (4), a unloading mechanism (5) and a drying mechanism (6); The conveying mechanism (1) comprises a linear module (11), the linear module (11) comprises a slide (12), a coating grid frame (13) is supported on the slide (12), and the coating grid frame (13) is used to place identification plates; The storage mechanism (2) and the feeding mechanism (3) are both located near the starting end of the linear module (11); the storage mechanism (2) is used to store the identification plate to be painted; and the feeding mechanism (3) is used to transfer the identification plate located at the storage mechanism (2) to the painting grid (13); The paint spraying mechanism (4) is arranged close to the linear module (11), and the paint spraying mechanism (4) is used to spray paint on the identification plate located on the painting grid (13); The unloading mechanism (5) and the drying mechanism (6) are both arranged near the end of the linear module (11); the unloading mechanism (5) is used to transfer the identification plate located on the coating grid (13) to the drying mechanism (6); and the drying mechanism (6) is used to dry the paint layer of the identification plate.

2. The automatic spray painting device for a signboard according to claim 1, characterized in that: The feeding mechanism (3) comprises a first manipulator (31), the driving end of the first manipulator (31) being connected to a gripping portion (32) for gripping the identification plate; the painting mechanism (4) comprises a second manipulator (41), the driving end of the second manipulator (41) being connected to a paint spray gun (42); the unloading mechanism (5) comprises a third manipulator (51), the driving end of the third manipulator (51) being connected to a gripping portion (52) for gripping the identification plate.

3. The automatic painting device for a signboard according to claim 2 is characterized in that: A cleaning component (10) is also supported on the linear module (11). The cleaning component (10) is arranged near the starting end of the linear module (11). The cleaning component (10) includes a cleaning air knife (101). The cleaning air knife (101) is supported above the moving path of the slide (12), and the cleaning air knife (101) is arranged toward the linear module (11).

4. The automatic painting device for a signboard according to claim 3 is characterized in that: The slide (12) is provided with a limit assembly (14) corresponding to the identification plate, and the limit assembly (14) comprises a limit bracket (141) and a lifting drive member (143); the limit bracket (141) is connected to a plurality of limit suction cups (142); the limit suction cups (142) are arranged vertically upward; the lifting drive member (143) is drivingly connected to the limit bracket (141); the lifting drive member (143) is used to drive the limit bracket (141) to move up and down, so as to drive the limit suction cups (142) to pass through the coating grid (13).

5. The automatic painting device for signboards according to claim 4 is characterized in that: When the first manipulator (31) grabs the identification plate through the grabbing portion (32) and places it on the painting grid (13), the lifting drive component (143) drives the limiting bracket (141) to drive the limiting suction cup (142) to move upward until the limiting suction cup (142) abuts against the bottom of the identification plate located on the painting grid (13).

6. The automatic spray painting device for a signboard according to claim 4, characterized in that: The clamping portion (52) comprises a finger cylinder (520), and two clamping blocks of the finger cylinder (520) are both connected with clamping plates (521), and the two clamping plates (521) are arranged opposite to each other.

7. The automatic painting device for a signboard according to claim 6 is characterized in that: When the third manipulator (51) clamps the identification plate on the painting grid (13) through the clamping portion (52), the lifting drive component (143) drives the limiting bracket (141) to drive the limiting suction cup (142) to move upward until the limiting suction cup (142) pushes the identification plate away from the painting grid (13).

8. The automatic spray painting device for a signboard according to claim 1, characterized in that: It also includes a water curtain cabinet (7), wherein the water curtain cabinet (7) and the paint spraying mechanism (4) are located on opposite sides of the linear module (11).

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