A continuous spraying robot for coloring processing of plastic products

Abstract

The present application relates to the technical field of plastic spraying, and specifically relates to a continuous spraying robot for coloring processing of plastic products, which comprises a mechanical arm, the top end of the mechanical arm is fixedly connected with a base, the top end of the base is fixedly connected with a main frame body, the outer wall of the main frame body is fixedly connected with a connecting ring frame, the top of the connecting ring frame is rotationally connected with a rotating disc, the inside of the main frame body is provided with three groups of evenly distributed centering mechanisms, and the top of the rotating disc is provided with three groups of evenly distributed spraying mechanisms. Through cooperation of a driving motor and forward and reverse rotation control, through design of an upper slide and a lower slide, the rack is finally pushed upward, the driving gear drives the three centering plates to be gathered to the center, automatic and accurate centering of the workpiece is realized, the baffle receives the initial unstable fluid, the motor is reversed to enter the spraying stage, the baffle is first radially away and then rotates, a plurality of arc-shaped carriages are pushed out when the moving ring is lowered, no additional power is needed, periodic swinging of the spray head is realized, and the spraying uniformity is significantly optimized.

Description

Technical Field

[0001] This invention relates to the field of plastic spraying technology, and more particularly to a continuous spraying robot for coloring plastic products. Background Technology

[0002] In the field of surface coating of plastic products, automated coating equipment has been widely adopted to improve production efficiency. Patent CN116441090B discloses a plastic parts coating device for simultaneous coating of multiple components. The device includes a receiving base, a support column located at the top center of the receiving base, with multiple ring-shaped mounting brackets on the outer wall of the top of the support column, and two symmetrically distributed coating brackets mounted at the bottom of the mounting brackets; coating components evenly spaced on the coating brackets; a feeding component located at the top of the support column and connected to the coating components; a pushing component located on the coating brackets; a movable component connected to the pushing component; multiple rotating shafts rotatably arranged in a ring on the receiving base, with turntables mounted on the rotating shafts; and a rotating component located at the bottom of the receiving base.

[0003] However, the aforementioned invention patent still has the following shortcomings: 1. When traditional fixing or clamping components clamp the workpiece, their mechanical structure often obscures part of the area to be sprayed, causing these obscured areas to be unable to be covered by paint during the rotational spraying process, forming spraying blind spots. After spraying, a second touch-up spraying is necessary, which not only reduces production efficiency but also easily causes uneven color and coating thickness, affecting the consistency of product appearance and quality; 2. The aforementioned invention uses the rotation of the parts for spraying. To avoid forming spraying blind spots, when the workpiece is released, the parts are very likely to rotate and change position, which will also cause the spraying radius to change continuously. The result is inevitably uneven coating thickness, which seriously affects the stability and reliability of spraying quality; 3. There is a lack of a preliminary waste removal process, the nozzle is directly exposed to the environment, and there is a lack of nozzle sealing protection mechanism. Residual paint is very likely to dry and solidify inside the nozzle, causing nozzle blockage. Therefore, a continuous spraying robot for coloring plastic products is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the background art by proposing a continuous spraying robot for coloring plastic products.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A continuous spraying robot for coloring plastic products includes a robotic arm, a base fixed to the top of the robotic arm, a main frame fixed to the top of the base, a connecting ring frame fixed to the outer wall of the main frame, a rotating disk rotatably connected to the top of the connecting ring frame, three sets of evenly distributed centering mechanisms arranged inside the main frame, and three sets of evenly distributed spraying mechanisms arranged on the top of the rotating disk. Each spraying mechanism includes a spray base, which is fixedly connected to the rotating disk.

[0007] The centering mechanism includes a centering plate, which is rotatably connected to the main frame via a first shaft. A centering gear is fixedly connected to the middle of the first shaft. A centering rack meshes with the outer wall of the centering gear. The outer wall of the centering rack is slidably connected to the centering plate. A movable ring is fixedly connected to the bottom end of the centering rack.

[0008] A circular frame is fixed to the bottom of the rotating disk. An upper slide rail and a lower slide rail are provided inside the circular frame. A connecting plate is fixed to the outer wall of the moving ring. A slide rod is fixed to the inside of the connecting plate. The slide rod is slidably connected to the lower slide rail and the upper slide rail.

[0009] The rotating disk has a sliding connection to a lower pressure ring inside. A rotating rack is fixed to the top of the lower pressure ring. A rotating gear meshes with the outer wall of the rotating rack. A second shaft is fixed to one side of the rotating gear. A second slide rod is fixed to the bottom of the baffle. The second slide rod is slidably connected to a limit frame. The limit frame is fixed to the rotating disk.

[0010] Preferably, the upper slide is located above the lower slide, and the two ends of the lower slide are connected to the upper slide.

[0011] Preferably, a fixed plate frame is provided below the connection between the lower slide and the upper slide, a top plate is slidably connected to the outer wall of the fixed plate frame, and a second spring is fixedly connected between the top plate and the fixed plate frame.

[0012] Preferably, the spray holder has four evenly distributed swing shafts internally rotatably connected, and the ends of the swing shafts are fixed to the spray head.

[0013] Preferably, a swing gear is fixedly connected to the end of the swing shaft away from the nozzle, a swing rack is meshed with the outer wall of the swing gear, four swing racks are fixedly connected to the same slide rod three, and a first spring is fixedly connected between the slide rod three and the rotating disk.

[0014] Preferably, a mating gear ring is fixedly connected to the bottom of the rotating disk, a drive gear meshes with the outer wall of the mating gear ring, a drive motor is provided below the drive gear, the drive motor is fixedly connected to the connecting ring frame, and the output shaft of the drive motor is fixedly connected to the drive gear.

[0015] Preferably, the outer wall of the connecting ring frame is slidably connected with a number of arc-shaped slides arranged in a circular array, and each arc-shaped slide is fixedly connected to the connecting ring frame with a tension spring.

[0016] Preferably, a scraper is fixed to one side of the outer wall of each spray station, and three sets of evenly distributed springs are fixed between the lower pressure ring and the main frame.

[0017] Compared with existing technologies, the advantages of this invention are as follows:

[0018] This invention drives the slide bar to slide in the upper slideway by the forward rotation of the drive motor, lifts the connecting plate through the top plate, and finally pushes the rack to move upward. The drive gear drives the three center plates to converge towards the center, realizing the automatic and precise centering of the workpiece. This structure accurately converts the rotational motion into radial centering action, ensuring that the distance between all nozzles and the workpiece is consistent, laying the foundation for subsequent uniform spraying.

[0019] During the brief period when the nozzle receives pigment but the center plate is far from the lower pressure ring, the baffle remains stationary because it is not driven. Its position is exactly in the spray path of the nozzle. This design allows it to passively receive and contain the initial unstable fluid discharged by the nozzle before the stable discharge. This structure effectively avoids waste splashing onto the workpiece or the spraying area and is an important pretreatment step to ensure the consistency of the first piece and subsequent workpieces.

[0020] After the motor reverses and enters the spraying stage, the moving ring moves down, and its internal rack drives the rotating gear to rotate 90 degrees, causing the baffle to disengage from the nozzle spray channel. The baffle, through the cooperation of the sliding rod two and the limit bracket sliding groove, first moves radially away and then rotates, which not only avoids interference with the nozzle, but also ensures that the nozzle can be reliably blocked in the non-spraying state to prevent dripping.

[0021] When the moving ring moves down, it simultaneously pushes several arc-shaped carriages to extend. When the rotating disk drives the nozzle to revolve, the slide bar fixed on the spray base moves along the arc-shaped carriages. Through the rack and pinion, it drives the swing gear, causing the nozzle to rotate and swing. This structure combines revolution and rotation, and without the need for additional power, it realizes the periodic swing of the nozzle, which significantly optimizes the uniformity of spraying.

[0022] This invention uses a drive motor with forward and reverse rotation control, and through the designed upper and lower slide rails, to convert rotational motion into precise actions for centering, waste discharge, spraying, and nozzle sealing. Without the need for an additional power source, it achieves automatic workpiece centering, periodic nozzle oscillation, and adaptive opening and closing of the baffle, significantly improving spray uniformity and material utilization. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the bottom of the rotating disk of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure at the toothed ring of the present invention;

[0026] Figure 4 This is the present invention. Figure 3 Schematic diagram of the structure at point A in the middle;

[0027] Figure 5 This is the present invention. Figure 3 Schematic diagram of the structure at point B;

[0028] Figure 6 This is a schematic diagram of the structure of the circular frame of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure at the top plate of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the limiting frame of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the oscillating gear in this invention;

[0032] Figure 10 This is the present invention. Figure 2 Schematic diagram of the structure at point C.

[0033] In the diagram: 1. Robotic arm; 2. Base; 3. Arc-shaped carriage; 4. Scraper; 5. Rotary disk; 6. Spray holder; 7. Baffle; 8. Centering plate; 9. Main frame; 10. Nozzle; 11. Moving ring; 12. Connecting ring frame; 13. Drive gear; 14. Drive motor; 15. Mating gear ring; 16. Centering gear; 17. Swinging rack; 18. Centering rack; 19. First shaft; 20. Lower pressure ring; 21. Second shaft; 22. Limiting frame; 23. Rotating gear; 24. Rotating rack; 25. Spring assembly; 26. Fixed plate frame; 27. Lower slide rail; 28. Upper slide rail; 29. ​​Slide rod one; 30. Connecting plate; 31. Top plate; 32. Ring frame; 33. Tension spring; 34. Second spring; 35. Slide rod two; 36. Slide rod three; 37. First spring; 38. Swing gear; 39. Swing shaft. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Reference Figures 1-10 A continuous spraying robot for coloring plastic products includes a robotic arm 1, a base 2 fixedly connected to the top of the robotic arm 1, a main frame 9 fixedly connected to the top of the base 2, a connecting ring frame 12 fixedly connected to the outer wall of the main frame 9, a rotating disk 5 rotatably connected to the top of the connecting ring frame 12, three sets of evenly distributed centering mechanisms arranged inside the main frame 9, and three sets of evenly distributed spraying mechanisms arranged on the top of the rotating disk 5. The spraying mechanism includes a spray base 6, which is fixedly connected to the rotating disk 5.

[0037] The centering mechanism includes a centering plate 8, which is rotatably connected to the main frame 9 via a first shaft 19. A centering gear 16 is fixedly connected to the middle of the first shaft 19. A centering rack 18 meshes with the outer wall of the centering gear 16. The outer wall of the centering rack 18 is slidably connected to the centering plate 8. A moving ring 11 is fixedly connected to the bottom end of the centering rack 18.

[0038] The bottom of the rotating disk 5 is fixedly connected to a circular ring frame 32. The inside of the circular ring frame 32 is provided with an upper slide rail 28 and a lower slide rail 27. The outer wall of the moving ring 11 is fixedly connected to a connecting plate 30. The inside of the connecting plate 30 is fixedly connected to a sliding rod 29.

[0039] A gear ring 15 is fixedly connected to the bottom of the rotating disk 5. A drive gear 13 meshes with the outer wall of the gear ring 15. A drive motor 14 is provided below the drive gear 13. The drive motor 14 is fixedly connected to the connecting ring frame 12. The output shaft of the drive motor 14 is fixedly connected to the drive gear 13.

[0040] In this embodiment, the drive motor 14 drives the drive gear 13 to rotate the mating gear ring 15 and the rotating disk 5, so that the entire rotating disk 5 rotates at a speed of 100°. Figure 7 The arrow in the middle b rotates slowly in the opposite direction. In the initial stage, the slide bar 29 slides along the upper slide rail 28. Under the lifting action of the top plate 31, the moving ring 11 and the center rack 18 are pushed upward through the connecting plate 30. The center rack 18 drives the center gear 16, which drives the first shaft 19 and the three center plates 8 to converge towards the center, so that the plastic product is accurately aligned and the distance between it and each spray seat 6 and spray head 10 is consistent, laying the foundation for uniform spraying.

[0041] The rotating disk 5 has a sliding connection to a lower pressure ring 20, a rotating rack 24 fixed to the top of the lower pressure ring 20, a rotating gear 23 meshing with the outer wall of the rotating rack 24, a second shaft 21 fixed to one side of the rotating gear 23, a slide rod 35 fixed to the bottom of the baffle 7, a limit frame 22 slidably connected to the slide rod 35, and the limit frame 22 is fixed to the rotating disk 5.

[0042] The upper slide 28 is located above the lower slide 27, and the two ends of the lower slide 27 are connected to the upper slide 28.

[0043] A fixed plate frame 26 is provided below the connection between the lower slide 27 and the upper slide 28. A top plate 31 is slidably connected to the outer wall of the fixed plate frame 26. A second spring 34 is fixed between the top plate 31 and the fixed plate frame 26.

[0044] In this embodiment, at the same time, the external pigment tube delivers pigment to the nozzle 10. As the centering plate 8 rotates away from the lower pressure ring 20, the baffle 7 remains stationary, receiving the waste material initially discharged from the nozzle 10 and avoiding contamination of the workpiece.

[0045] After the slide bar 29 slides into the lower slide channel 27, the drive motor 14 reverses, pushing the slide bar 29 to move in a circular motion along the lower slide channel 27, entering the formal spraying stage. At this time, the moving ring 11 moves down to the lowest position, pushing the centering rack 18 to make the centering plate 8 fit tightly against the rotating disk 5, pressing the lower pressure ring 20 back to avoid obstructing the paint. At the same time, the rotating rack 24 drives the rotating gear 23 and the second shaft 21 to rotate 90 degrees, causing the baffle 7 to disengage from the spray channel of the nozzle 10.

[0046] During the rotation process, the baffle 7 moves away from the nozzle 10 and then rotates through the cooperation of the slide bar 35 and the sliding groove of the limit frame 22. This can block the nozzle to prevent dripping when not spraying, and can also adaptively retreat to receive residual waste when spraying.

[0047] The spray base 6 has four evenly distributed swing shafts 39 rotatably connected inside, and the ends of the swing shafts 39 are fixed to the nozzles 10.

[0048] A swing gear 38 is fixedly connected to the end of the swing shaft 39 away from the nozzle 10. A swing rack 17 is meshed with the outer wall of the swing gear 38. The four swing racks 17 are fixedly connected to the same slide bar 36. A first spring 37 is fixedly connected between the slide bar 36 and the rotating disk 5.

[0049] The outer wall of the connecting ring frame 12 is slidably connected with several arc-shaped slides 3 arranged in a circular array, and each arc-shaped slide 3 is fixedly connected to the connecting ring frame 12 with a tension spring 33.

[0050] Since the end of the arc-shaped carriage 3 near the moving ring 11 is inclined, when the moving ring 11 moves down, it simultaneously pushes several arc-shaped carriages 3 to extend and be placed below the slide bar 36. When the rotating disk 5 drives the spray seat 6 to rotate, the slide bar 36 moves back and forth along the trajectory of the arc-shaped carriage 3. Through the swing rack 17, it drives the swing gear 38, causing the spray head 10 to swing periodically, further optimizing the uniformity of spraying.

[0051] After the preset rotating disk 5 rotates a fixed number of times, and the spraying is completed, the drive motor 14 reverses again, causing the slide bar 29 to retract to the position shown. Figure 7At the connection between the upper slide 28 and the lower slide 27, the top plate 31 resets the machine, the center plate 8 releases the workpiece, and the baffle 7 rotates to block the nozzle 10, thus achieving machine stop protection and restoring the whole machine to standby state.

[0052] Each spray nozzle 6 has a scraper 4 fixedly connected to one side of its outer wall, and three sets of evenly distributed spring groups 25 are fixedly connected between the lower pressure ring 20 and the main frame 9.

[0053] In this embodiment, the surface waste of the baffle 7 is removed by the scraper 4 during the rotation process.

[0054] The working principle and usage of this invention are explained in detail below: The robotic arm 1 can be adjusted in direction, and can place plastic products on the main frame 9 for spraying, or place plastic products on a table, with the base 2 in an inverted state for spraying plastic products.

[0055] The drive motor 14 drives the drive gear 13, which in turn drives the mating gear ring 15 and the rotating disk 5 to rotate, so that the entire rotating disk 5 rotates at a speed of 100°. Figure 7 The arrow in the middle b rotates slowly in the opposite direction. In the initial stage, the slide bar 29 slides along the upper slide rail 28. Under the lifting action of the top plate 31, the moving ring 11 and the center rack 18 are pushed upward through the connecting plate 30. The center rack 18 drives the center gear 16, which drives the first shaft 19 and the three center plates 8 to converge towards the center, so that the plastic product is accurately aligned and the distance between it and each spray seat 6 and spray head 10 is consistent, laying the foundation for uniform spraying.

[0056] At the same time, the external pigment tube delivers pigment to the nozzle 10. As the center plate 8 rotates away from the lower pressure ring 20, the baffle 7 remains stationary, receiving the waste material initially discharged from the nozzle 10 and preventing contamination of the workpiece.

[0057] After the slide bar 29 slides into the lower slide channel 27, the drive motor 14 reverses, pushing the slide bar 29 to move in a circular motion along the lower slide channel 27, entering the formal spraying stage. At this time, the moving ring 11 moves down to the lowest position, pushing the centering rack 18 to make the centering plate 8 fit tightly against the rotating disk 5, pressing the lower pressure ring 20 back to avoid obstructing the paint. At the same time, the rotating rack 24 drives the rotating gear 23 and the second shaft 21 to rotate 90 degrees, causing the baffle 7 to disengage from the spray channel of the nozzle 10.

[0058] During the rotation process, the baffle 7 moves away from the nozzle 10 and then rotates through the cooperation of the slide bar 35 and the sliding groove of the limit frame 22. This can block the nozzle to prevent dripping when not spraying, and can also adaptively retreat to receive residual waste when spraying.

[0059] Since the end of the arc-shaped carriage 3 near the moving ring 11 is inclined, when the moving ring 11 moves down, it simultaneously pushes several arc-shaped carriages 3 to extend and be placed below the slide bar 36. When the rotating disk 5 drives the spray seat 6 to rotate, the slide bar 36 moves back and forth along the trajectory of the arc-shaped carriage 3. Through the swing rack 17, it drives the swing gear 38, causing the spray head 10 to swing periodically, further optimizing the uniformity of spraying.

[0060] After the preset rotating disk 5 rotates a fixed number of times, and the spraying is completed, the drive motor 14 reverses again, causing the slide bar 29 to retract to the position shown. Figure 7 At the connection between the upper slide 28 and the lower slide 27, the top plate 31 resets the machine, the center plate 8 releases the workpiece, and the baffle 7 rotates to block the nozzle 10, thus achieving machine stop protection and restoring the whole machine to standby state.

[0061] During the rotation of the baffle 7, the waste material on its surface is removed by the scraper 4.

[0062] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A continuous spraying robot for coloring plastic products, comprising a robotic arm (1), characterized in that, The top of the robotic arm (1) is fixedly connected to a base (2), the top of the base (2) is fixedly connected to a main frame (9), the outer wall of the main frame (9) is fixedly connected to a connecting ring frame (12), the top of the connecting ring frame (12) is rotatably connected to a rotating disk (5), the inside of the main frame (9) is provided with three sets of evenly distributed centering mechanisms, the top of the rotating disk (5) is provided with three sets of evenly distributed spraying mechanisms, the spraying mechanism includes a spray base (6), the spray base (6) is fixedly connected to the rotating disk (5); The centering mechanism includes a centering plate (8), which is rotatably connected to the main frame (9) via a first shaft (19). A centering gear (16) is fixedly connected to the middle of the first shaft (19), and a centering rack (18) meshes with the outer wall of the centering gear (16). The outer wall of the centering rack (18) is slidably connected to the centering plate (8), and a moving ring (11) is fixedly connected to the bottom end of the centering rack (18). A circular ring frame (32) is fixedly connected to the bottom of the rotating disk (5). An upper slide rail (28) and a lower slide rail (27) are provided inside the circular ring frame (32). A connecting plate (30) is fixedly connected to the outer wall of the moving ring (11). A sliding rod (29) is fixedly connected inside the connecting plate (30). The sliding rod (29) is slidably connected to the lower slide rail (27) and the upper slide rail (28). A pressure ring (20) is slidably connected inside the rotating disk (5). A rotating rack (24) is fixedly connected to the top of the pressure ring (20). A rotating gear (23) meshes with the outer wall of the rotating rack (24). A second shaft (21) is fixedly connected to one side of the rotating gear (23). A slide rod (35) is fixedly connected to the bottom of the baffle (7). A limit frame (22) is slidably connected to the slide rod (35). The limit frame (22) is fixedly connected to the rotating disk (5). The rotating rack (24) drives the rotating gear (23) and the second shaft (21) to rotate 90 degrees, causing the baffle (7) to disengage from the nozzle (10) spray channel. The upper slide (28) is located above the lower slide (27), and the two ends of the lower slide (27) are connected to the upper slide (28); A fixed plate frame (26) is provided below the connection between the lower slide (27) and the upper slide (28). A top plate (31) is slidably connected to the outer wall of the fixed plate frame (26). A second spring (34) is fixed between the top plate (31) and the fixed plate frame (26). A gear ring (15) is fixedly connected to the bottom of the rotating disk (5). A drive gear (13) meshes with the outer wall of the gear ring (15). A drive motor (14) is provided below the drive gear (13). The drive motor (14) is fixedly connected to the connecting ring frame (12). The output shaft of the drive motor (14) is fixedly connected to the drive gear (13). Three sets of evenly distributed spring groups (25) are fixed between the pressure ring (20) and the main frame (9).

2. The continuous spraying robot for coloring plastic products according to claim 1, characterized in that: The spray base (6) has four evenly distributed swing shafts (39) inside for rotational connection, and the ends of the swing shafts (39) are fixed to the nozzles (10).

3. The continuous spraying robot for coloring plastic products according to claim 2, characterized in that: A swing shaft (39) is fixed to a swing gear (38) at the end away from the nozzle (10). A swing rack (17) meshes with the outer wall of the swing gear (38). The four swing racks (17) are fixed to the same slide bar three (36). A first spring (37) is fixed between the slide bar three (36) and the rotating disk (5).

4. The continuous spraying robot for coloring plastic products according to claim 1, characterized in that: The outer wall of the connecting ring frame (12) is slidably connected with several arc-shaped slides (3) arranged in a circular array, and each arc-shaped slide (3) is fixedly connected to the connecting ring frame (12) with a tension spring (33).

5. The continuous spraying robot for coloring plastic products according to claim 1, characterized in that: Each spray nozzle (6) has a scraper (4) fixed to one side of its outer wall.

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