Intelligent spraying equipment for veneer cabinet scale production and process thereof

Abstract

The present application relates to the technical field of spraying equipment, and is especially a kind of intelligent spraying equipment for coating wood veneer cabinet scale production and its process, comprising a three-axis displacement mechanism, which is installed at the top of the inner cavity of the spraying bin and above the conveying belt, and forms the main body of the equipment for spraying and processing the plate material through the spraying bin and the conveying belt, the three-axis displacement mechanism is composed of a first moving frame, a second moving frame and a third moving frame, the first moving frame is moved along the longitudinal line by the second moving frame, the third moving frame is moved along the horizontal line by the first moving frame, and the vertical line movement is realized by the third moving frame, the present application completes large-scale spraying of the plate material by the reciprocating main spray gun in the spraying bin, and the laser profile sensor is used to identify the wood veneer joint seam, recess and other easily missed areas, and then the three-axis linkage auxiliary spray gun is used for accurate supplementary coating, so as to solve the problems of missed spraying and uneven thickness caused by fixed trajectory spraying.

Description

Technical Field

[0001] This invention relates to the field of spraying equipment technology, specifically to an intelligent spraying equipment and process for the mass production of coated wood veneer cabinets. Background Technology

[0002] Wood veneer cabinets have become one of the mainstream products in the home furnishing market in recent years. They are made by bonding natural wood veneer to a substrate to form a surface decorative layer, combining the natural beauty of wood grain with the structural stability of the substrate. They are widely used in residential and commercial spaces. During the production process, wood veneer cabinets need to be coated with spraying equipment. At present, wood veneer cabinet spraying equipment is mainly divided into manual spray guns and reciprocating automatic spray guns. Among them, reciprocating automatic spray guns have become the mainstream choice for large-scale factories because they are suitable for large-scale continuous production.

[0003] Traditional reciprocating spray guns use a fixed trajectory for large-area spraying. To ensure the spraying area, the spray gun sprays a fan-shaped spray of paint, resulting in different pressures between the area directly below the nozzle and the edge of the fan, leading to uneven coating thickness. At the same time, to avoid missed spraying, the spray gun is driven to spray repeatedly, which can cause paint to accumulate and cause drips at the chamfered edges. In addition, the traditional process requires the board to be pre-treated by veneer, wire drawing, etc., before the full-surface UV base coat is applied by the spraying equipment. Subsequent processing such as cutting and edge sealing also need to be completed in sequence. The process is disjointed and cannot achieve pre-processing in batches, resulting in a long production cycle. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent spraying equipment and process for the mass production of coated wood veneer cabinets, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A smart spraying equipment for mass production of coated wood veneer cabinets includes a three-axis displacement mechanism installed at the top of the inner cavity of the spraying chamber and above the conveyor belt. The spraying chamber and the conveyor belt together form the main body of the equipment for spraying the boards. The three-axis displacement mechanism is composed of a first moving frame, a second moving frame, and a third moving frame. The second moving frame drives the first moving frame to move along the longitudinal line, the first moving frame drives the third moving frame to move along the transverse line, and the third moving frame achieves vertical line movement. The auxiliary spray gun is mounted on the third movable frame. The three-axis displacement mechanism enables precise movement of the auxiliary spray gun, allowing it to be used for spot coating on the panels transported by the conveyor belt. The shifting frame is located at the top of the inner cavity of the spraying chamber and moves back and forth along the top of the spraying chamber. The main spray gun is also installed on the shifting frame. The large-scale spraying of the board is carried out by the reciprocating movement of the shifting frame. An airflow chamber is located in a cavity inside the auxiliary spray gun. A valve core is installed at the top of the airflow chamber. The paint initially enters the chamber of the airflow chamber through the valve core. At least two air injection pipes are connected to the outside of the airflow chamber, and high-speed airflow is injected into the inner cavity of the airflow chamber through the air injection pipes. The vibrating chamber is located in the cavity of the auxiliary spray gun and below the airflow chamber. The vibrating chamber includes a screen, which vibrates at a high frequency when the paint enters the vibrating chamber through the airflow chamber.

[0006] Preferably, the first movable frame includes a threaded rod connected to both ends of the inner wall of the first movable frame, a movable sleeve disposed on the outside of the threaded rod, a base connected to the outside of the movable sleeve, a drive gear disposed inside the base and driven by a motor, and a driven gear meshing with the drive gear, so that when the drive gear rotates, it drives the driven gear and the movable sleeve to rotate, and causes the movable sleeve to move along the outside of the threaded rod. The second movable frame and the third movable frame are both provided with the same displacement structure as the first movable frame.

[0007] Preferably, a turntable is provided in the inner cavity of the airflow chamber and below the connection hole of the air injection pipe. At least two wind-facing plates are provided on the top outer edge of the turntable. The wind-facing plates are sloped on the surface facing the connection hole. A solenoid valve is also provided on the turntable for closing or opening the flow path of the coating.

[0008] Preferably, a plurality of power blocks are provided below the turntable, and a plurality of vibrating blocks are provided on the top of the screen. The corresponding surfaces of the vibrating blocks and the power blocks are all set as mutually compatible inclined surfaces. Anti-detachment seats are provided on the outer side of the screen and at the corresponding positions of the vibrating blocks. The anti-detachment seats are located in the grooves opened in the inner wall of the vibration chamber, and a spring is provided on its top for quick reset after the anti-detachment seats move downward.

[0009] Preferably, the valve core includes a valve seat and a valve plug. The valve seat has a number of valve channels on its outer side. The paint can be transferred to the interior of the auxiliary spray gun through the valve channels. The paint can be partially blocked from passing through the valve channels by moving the valve plug.

[0010] Preferably, the third movable frame further includes a transmission bar connected to one side of the first movable frame, a driven bar connected to the other side of the first movable frame, and a gear set for driving the transmission bar and the driven bar, wherein the bottom end of the driven bar is connected to the top of the valve plug.

[0011] Preferably, the auxiliary spray gun further includes a nozzle located at the lowest end of the main cavity of the auxiliary spray gun. The inner wall of the nozzle is provided with an annular air duct at the paint outlet, and the outer side of the nozzle is provided with an air inlet connected to one end of the air injection pipe at the opening of the annular air duct.

[0012] A smart spraying process for mass production of coated wood veneer cabinets, S1: large board pretreatment, the raw board is cut, veneer cut, veneer splicing, veneer pasting and wire drawing treatment in sequence, and then the wood veneer is tightly bonded to the raw board through cold pressing or hot pressing process to obtain pretreated large board; S2: Pre-coated UV primer: The pre-treated large board is transported to the UV roller coating area, and UV primer is uniformly coated on the entire surface of the large board by roller coating equipment to obtain a pre-coated UV primer large board; S3: Cutting and edge banding. Cut the pre-coated UV base board according to the size of the cabinet parts. Band the edges of the cut parts. After banding, use a sanding machine to sand the surface of the parts and the banded area to remove burrs and defects. S4: Intelligent spraying, which transports the sanded sheet material to the conveyor belt of the spraying chamber, starts the shifting frame to drive the main spray gun to move back and forth along the top of the spraying chamber, and performs large-scale basic spraying on the surface of the parts. S5: Precise touch-up coating. The laser contour sensor scans the surface of the board after the basic spraying, focuses on identifying the spraying edge of the main spray gun, and uses the auxiliary spray gun to dot or touch up the target area. S6: Color correction and topcoat. The parts after touch-up are color corrected to meet the design standards. Then, water-based topcoat is sprayed again through the main spray gun. Finally, the parts are sent to the drying room to complete the painting process.

[0013] Preferably, in step S2, a constant temperature roller coating method is used during UV roller coating to avoid the uniformity of roller coating caused by changes in the viscosity of UV primer due to temperature fluctuations; in step S6, the drying room adopts a segmented drying method, first drying at a lower temperature and then increasing the temperature to continue drying, to avoid defects in the topcoat due to sudden temperature changes.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention completes large-scale spraying of boards by setting a reciprocating main spray gun in the spraying chamber, and uses a laser contour sensor to identify easily missed areas such as wood veneer splicing seams and depressions. Then, a three-axis linkage auxiliary spray gun accurately touches up the coating, which solves the problems of missed spraying and uneven thickness caused by fixed trajectory spraying. It also reduces the amount of coating sprayed by the main spray gun to avoid paint accumulation, reduces the risk of sagging, and ensures uniform coating. Based on the above structure, the coating is delivered to the first-stage high-pressure airflow chamber, where compressed air forms a "vortex field" that tears the coating into primary atomized particles. Then, the coating is further refined by high-frequency vibration in the second-stage vibration chamber and secondary shearing by the screen. Finally, an annular guide airflow curtain forms a "pressure barrier" to constrain particle diffusion and prevent particle deviation caused by airflow turbulence, thus achieving the goal of accurately covering the recoating area. Based on the above structure, the vertical axis controls the auxiliary spray gun to move up and down, and controls the valve core to achieve linkage adjustment. When touching up a small area, the vertical axis controls the auxiliary spray gun to move down so that the nozzle is close to the spraying position, and at the same time drives the valve core to narrow the channel. When touching up a large area, the vertical axis controls the auxiliary spray gun to move up, and at the same time widens the valve core channel. This solves the problem of paint waste or insufficient touch-up amount caused by the inability to flexibly adjust the paint flow according to the size of the touch-up area when relying solely on two-stage atomization and precise positioning for touch-up. It achieves stepless adjustment of paint flow and accurately matches the spraying amount requirements of different areas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the shifting frame in this invention; Figure 3 This is a schematic diagram of the overall structure of the triaxial displacement mechanism in this invention; Figure 4 For the present invention Figure 3 A schematic diagram of the overall structure and a partial enlarged view of the first mobile frame in the middle; Figure 5 In this invention Figure 3 A schematic diagram of the overall structure of the [company / organization]. Figure 6 This is a cross-sectional view of the airflow cavity and the vibration cavity in this invention; Figure 7 This is a schematic diagram of the corresponding surfaces of the airflow cavity and the vibration cavity in this invention; Figure 8 For the present invention Figure 3 A schematic diagram of the overall structure of the third mobile frame; Figure 9 For the present invention Figure 5 A schematic diagram of the overall structure of the central valve core; Figure 10 For the present invention Figure 5 Cross-sectional view of the overall structure of the nozzle; Figure 11 This is a process flow diagram of an intelligent spraying process for the mass production of coated wood veneer cabinets.

[0016] In the diagram: 1. Main body of the equipment; 11. Conveyor belt; 12. Spraying chamber; 2. Shifting frame; 21. Main spray gun; 3. Three-axis displacement mechanism; 31. First moving frame; 311. Threaded rod; 312. Base; 313. Movable sleeve; 314. Driven gear; 315. Drive gear; 32. Second moving frame; 33. Third moving frame; 331. Transmission bar; 332. Driven bar; 333. Gear set; 4. Auxiliary spray gun; 41. Nozzle; 411. Air inlet; 412. Annular air duct; 42. Airflow chamber; 421. Turntable; 422. Wind vane; 423. Solenoid valve; 424. Power block; 43. Vibration chamber; 431. Screen; 432. Vibration block; 433. Anti-detachment seat; 44. Air injection pipe; 45. Valve core; 451. Valve seat; 452. Valve plug; 453. Valve passage. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0019] like Figure 1 , Figure 2 , Figure 3 As shown in the figure, this embodiment discloses an intelligent spraying equipment for mass production of coated wood veneer cabinets, including a shifting frame 2, a three-axis displacement mechanism 3, and an auxiliary spray gun 4. The shifting frame 2 and the three-axis displacement mechanism 3 are both installed on the spraying chamber 12 and located above the conveyor belt 11. The three-axis displacement mechanism 3 is composed of a first moving frame 31, a second moving frame 32, and a third moving frame 33. The auxiliary spray gun 4 is installed on the three-axis displacement mechanism 3, and the shifting frame 2 is also equipped with a main spray gun 21.

[0020] Furthermore, most existing spraying devices transport the board material via a conveyor belt 11 and move back and forth via a shift frame 2 to continuously spray the board material with the main spray gun 21. During the spraying process, due to the wide spraying area, the paint is sprayed out from the nozzle 41 in a fan-shaped spread, resulting in inconsistent spraying pressure in the middle and at the edges. This easily leads to a thicker coating on the board material in the middle area of ​​the nozzle 41 and a thinner coating at the edges of the nozzle 41. In order to avoid this situation, the amount of paint sprayed is often increased, which easily causes dripping on the sides of the board material.

[0021] During use, the board material is first coated with a large-area base coat by the main spray gun 21. After the coating is completed, a laser contour sensor installed between the shift frame 2 and the three-axis displacement mechanism 3 scans the surface of the board material, especially areas that are easily missed or unevenly coated in the base coat. The location that needs to be touched up is recorded. The second moving frame 32 drives the first moving frame 31 to move longitudinally, the first moving frame 31 drives the third moving frame 33 to move laterally, and the third moving frame 33 drives the auxiliary spray gun 4 to move vertically. The auxiliary spray gun 4 is moved to the location that needs to be touched up and spot-coated onto the board material. This ensures that the surface coating is uniform and complete, while also reducing the amount of coating sprayed by the main spray gun 21 and reducing the amount of paint accumulation on the board material, thus reducing the risk of sagging from the source.

[0022] like Figure 4 As shown, the first movable frame 31 includes a threaded rod 311 connected to both ends of the inner wall of the first movable frame 31, a movable sleeve 313 disposed on the outside of the threaded rod 311, a base 312 connected to the outside of the movable sleeve 313, a drive gear 315 disposed inside the base 312 and driven by a motor, and a driven gear 314 meshing with the drive gear 315. The drive gear 315 is driven to rotate by the motor, and because the drive gear 315 meshes with the driven gear 314, the rotation of the drive gear 315 drives the driven gear 314 to rotate, which in turn drives the movable sleeve 313 to rotate. The movable sleeve 313 is provided with a spiral groove that matches the outer spiral pattern of the threaded rod 311. When the movable sleeve 313 rotates, it moves along the outer side of the threaded rod 311. The movement of the movable sleeve 313 drives the base 312 to move, and the movement of the base 312 drives the third movable frame 33 to move. Both the second movable frame 32 and the third movable frame 33 are provided with the same displacement structure as the first movable frame 31, so that the second movable frame 32 drives the first movable frame 31 to move longitudinally, the first movable frame 31 drives the third movable frame 33 to move laterally, and the third movable frame 33 drives the auxiliary spray gun 4 to move vertically, so that the auxiliary spray gun 4 moves to the position where it needs to be touched up.

[0023] like Figure 5As shown, the auxiliary spray gun 4 also includes a nozzle 41, an airflow chamber 42, and a vibration chamber 43. The airflow chamber 42 and the vibration chamber 43 are both located in the cavity of the auxiliary spray gun 4, and the vibration chamber 43 is located below the airflow chamber 42. At least two air injection pipes 44 are connected to the outside of the airflow chamber 42, and the outside of the airflow chamber 42 is provided with connection holes for connecting to the air injection pipes 44. The number of connection holes is four and they are symmetrical to each other. External air is compressed by an air pump and delivered to the cavity of the airflow chamber 42 through the air injection pipes 44 to form a rotating airflow. The high-speed rotating airflow forms a "vortex field" in the cavity. After the paint enters the air injection pipe 44 through the valve core 45, it is quickly torn apart by the shear force and centrifugal force of the airflow. The liquid paint first forms a "filamentous liquid flow" and then breaks into primary atomized particles under the impact of the airflow. These atomized particles enter the vibration chamber 43.

[0024] like Figure 6 and Figure 7 As shown, a turntable 421 is provided below the connection hole between the inner cavity of the airflow chamber 42 and the air injection pipe 44. At least two wind-facing plates 422 are provided on the outer edge of the top of the turntable 421. The wind-facing plates 422 are sloped on the side facing the connection hole. When the high-speed rotating airflow forms a "vortex field" in the airflow chamber 42, the sloped wind-facing plates 422 are pushed by the airflow. Under the action of the pushing force, the turntable 421 is rotated. A solenoid valve 423 is also provided on the turntable 421 for closing. Alternatively, the flow path of the coating can be opened. Below the turntable 421, several power blocks 424 are also provided, and at the top of the screen 431, several vibrating blocks 432 are provided. The corresponding surfaces of the vibrating blocks 432 and the power blocks 424 are all designed as mutually compatible inclined surfaces. When the turntable 421 rotates, the power blocks 424 rotate, colliding with the vibrating blocks 432. Because they are designed as mutually compatible inclined surfaces, each time the power blocks 424 and the vibrating blocks 432 collide... The side corresponding to the screen 431 will be subjected to a downward thrust. The outer side of the screen 431 and the corresponding position of the vibrating block 432 are provided with anti-detachment seats 433. The anti-detachment seats 433 are located in the groove opened in the inner wall of the vibration chamber 43, and a spring is provided on its top. This is used to quickly reset the anti-detachment seats 433 after they move downward. When one side of the screen 431 moves downward, the spring on the anti-detachment seat 433 is stretched. Then, after the power block 424 and the vibrating block 432 stop colliding, the spring quickly rebounds. As the turntable 421 rotates continuously, the multiple power blocks 424 on its bottom outer side and the multiple vibrating blocks 432 on the top outer side of the screen 431 collide with each other, causing the edge of the screen 431 to move downward continuously and then rebound quickly, generating high-frequency vibration. The screen 431 forms a secondary shearing force on the incoming paint particles. On the other hand, the high-frequency vibration can break the surface tension of the particles, prevent small particles from re-aggregating, and make the paint produce ultra-fine atomized particles that flow out from the screen 431.

[0025] like Figure 5 and Figure 10 As shown, the auxiliary spray gun 4 also includes a nozzle 41, which is located at the lowest end of the main cavity of the auxiliary spray gun. An annular air duct 412 is provided on the inner wall of the nozzle 41 at the paint outlet. An air inlet 411, connected to one end of the air injection pipe 44, is opened at the opening of the annular air duct 412 on the outer side of the nozzle 41. After the atomized particles flowing out through the screen 431 enter the nozzle 41, a high-speed airflow is generated at the other end of the air injection pipe 44 by an air pump, and injected into the inner cavity of the nozzle 41 through the air inlet 411. Located at the opening of the annular air duct 412, the high-speed airflow enters the nozzle 41 and forms an annular airflow in the annular air duct 412. This annular airflow then envelops the atomized particles at the outlet of the nozzle 41. At the same time, the annular airflow forms a pressure barrier, preventing the atomized particles from diffusing outward. This ensures that the particles always move within a "columnar flow field" of diameter, ensuring that the particles move at a uniform speed perpendicular to the surface of the board along the spraying direction. This avoids "particle deviation" caused by airflow turbulence and prevents paint from spreading when sprayed from the nozzle 41, thus achieving the goal of accurately covering the touch-up area.

[0026] like Figure 8 and Figure 9As shown, the valve core 45 includes a valve seat 451 and a valve plug 452. A plurality of valve channels 453 are formed on the outer side of the valve seat 451. Paint can be transferred to the interior of the auxiliary spray gun 4 through the valve channels 453. Moving the valve plug 452 can block part of the space through which the paint passes through the valve channels 453. By controlling the up-and-down movement of the valve plug 452, the area of ​​the valve plug 452 blocking the valve channels 453 is adjusted. When the blocking area of ​​the valve plug 452 is larger, the speed at which the paint enters the chamber of the auxiliary spray gun 4 through the valve core 45 is slower; when the blocking area of ​​the valve plug 452 is smaller, the speed at which the paint passes through the valve... The speed at which the core 45 enters the chamber of the auxiliary spray gun 4 increases. The third moving frame 33 also includes a transmission bar 331 connected to one side of the first moving frame 31, a driven bar 332 connected to the other side of the first moving frame 31, and a gear set 333 for driving the transmission bar 331 and the driven bar 332. The bottom end of the driven bar 332 is connected to the top of the valve plug 452, and the bottom end of the transmission bar 331 is connected to the base 312 on which the auxiliary spray gun 4 is mounted. When the third moving frame 33 drives the auxiliary spray gun 4 to move downward, it drives the transmission bar 331 to move downward. One side of the drive bar 331 meshes with one of the gear components of the gear set 333. The downward movement of the drive bar 331 causes the gear set 333 to rotate. Simultaneously, one side of the driven bar 332 meshes with one of its gears. The rotation of the gear set 333 controls the downward movement of the driven bar 332. This downward movement of the driven bar 332 pushes the valve plug 452 downward, thus reducing the exposed area of ​​the valve passage 453. As a result, the paint enters the auxiliary spray gun 4 more slowly, and the spray flow rate of the nozzle 41 decreases. Based on this principle, when the first moving frame 31 controls the auxiliary spray... When the gun 4 moves upward, it will drive the transmission bar 331 to move upward, thereby causing the valve plug 452 to move upward and increasing the spray flow of the nozzle 41. In order to control the accuracy of paint touch-up, when touching up a small area, the third moving frame 33 will be controlled to move downward so that the nozzle 41 is closer to the touching area. At this time, the spray flow of the nozzle 41 will automatically decrease. When touching up a large area, the third moving frame 33 will be controlled to move downward so that the nozzle 41 is away from the touching area. At this time, the spray flow of the nozzle 41 will automatically increase, realizing stepless adjustment of paint flow and accurately matching the spray volume requirements of different areas.

[0027] like Figure 11 As shown, this embodiment discloses an intelligent spraying process for the mass production of coated wood veneer cabinets. S1: Large board pretreatment, the raw board is cut, veneer is cut, veneer is spliced, veneer is applied and wire-drawing is performed in sequence. Then, the wood veneer is tightly bonded to the raw board through cold pressing or hot pressing process to obtain pretreated large board. S2: Pre-coated UV primer: The pre-treated large board is transported to the UV roller coating area, and UV primer is uniformly coated on the entire surface of the large board by roller coating equipment to obtain a pre-coated UV primer large board; S3: Cutting and edge banding. Cut the pre-coated UV base board according to the size of the cabinet parts. Band the edges of the cut parts. After banding, use a sanding machine to sand the surface of the parts and the banded area to remove burrs and defects. S4: Intelligent spraying, the sanded sheet material is transported to the conveyor belt 11 of the spraying chamber 12, the shift frame 2 is started to drive the main spray gun 21 to move back and forth along the top of the spraying chamber 12 to carry out large-scale basic spraying on the surface of the component. S5: Precise touch-up coating. The laser contour sensor scans the surface of the board after the basic spraying, focuses on identifying the spraying edge of the main spray gun 21, and uses the auxiliary spray gun 4 to dot or touch up the target area. S6: Color correction and topcoat. The parts after touch-up coating undergo color correction to adjust the color to the design standard. Then, the water-based topcoat is sprayed again through the main spray gun 21. Finally, it is sent to the drying room to complete the coating. Through the pre-process design of "pre-roll coating of UV base plate + post-processing", the traditional process of "processing first and then spraying" is broken, which shortens the production cycle compared with the traditional process and adapts to the needs of large-scale production.

[0028] like Figure 11 As shown, in step S2, a constant temperature roller coating method is used during UV roller coating to avoid the change in viscosity of UV primer due to temperature fluctuations affecting the uniformity of roller coating; in step S6, the drying room adopts a segmented drying method, first drying at a lower temperature and then increasing the temperature to continue drying, to avoid defects in the topcoat due to sudden temperature changes.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. The present invention is not limited to the above embodiments; the embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent spraying equipment for large-scale production of coated wood veneer cabinets, characterized in that: Including The three-axis displacement mechanism (3) is installed at the top of the inner cavity of the spraying chamber (12) and above the conveyor belt (11). The spraying chamber (12) and the conveyor belt (11) together form the main body (1) of the equipment for spraying the sheet metal. The three-axis displacement mechanism (3) is composed of a first moving frame (31), a second moving frame (32) and a third moving frame (33). The second moving frame (32) drives the first moving frame (31) to move along the longitudinal line, the first moving frame (31) drives the third moving frame (33) to move along the transverse line, and the third moving frame (33) realizes vertical line movement. The auxiliary spray gun (4) is mounted on the third moving frame (33). The three-axis displacement mechanism (3) enables precise movement of the auxiliary spray gun (4), so that the auxiliary spray gun (4) can be used to apply spot coating to the plates transported by the conveyor belt (11). The shift frame (2) is located at the top of the inner cavity of the spraying chamber (12) and moves back and forth along the top of the spraying chamber (12). The shift frame (2) is also equipped with a main spray gun (21). The shift frame (2) is moved back and forth to spray the board on a large scale. An airflow chamber (42) is provided in a cavity inside the auxiliary spray gun (4). A valve core (45) is provided at the top of the airflow chamber (42). The paint enters the chamber of the airflow chamber (42) through the valve core (45). At least two air injection pipes (44) are connected to the outside of the airflow chamber (42). High-speed airflow is injected into the inner cavity of the airflow chamber (42) through the air injection pipes (44). The vibration chamber (43) is located in the cavity of the auxiliary spray gun (4) and below the airflow chamber (42). The vibration chamber (43) includes a screen (431). When the paint enters the vibration chamber (43) through the airflow chamber (42), the screen (431) generates high-frequency vibration. A turntable (421) is provided in the inner cavity of the airflow chamber (42) and below the connection hole of the air injection pipe (44). At least two wind-facing plates (422) are provided on the top outer edge of the turntable (421). The wind-facing plates (422) are set as inclined surfaces on the surface facing the connection hole. A solenoid valve (423) is also provided on the turntable (421) for closing or opening the flow path of the coating. Several power blocks (424) are provided below the turntable (421), and several vibration blocks (432) are provided on the top of the screen (431). The corresponding surfaces of the vibration blocks (432) and the power blocks (424) are all set as mutually compatible inclined surfaces. Anti-detachment seats (433) are provided on the outer side of the screen (431) and at the corresponding positions of the vibration blocks (432). The anti-detachment seats (433) are located in the groove opened in the inner wall of the vibration chamber (43), and a spring is provided on its top for the anti-detachment seats (433) to quickly reset after moving downward.

2. The intelligent spraying equipment for large-scale production of coated wood veneer cabinets according to claim 1, characterized in that: The first movable frame (31) includes a threaded rod (311) connected to both ends of the inner wall of the first movable frame (31), a movable sleeve (313) disposed on the outside of the threaded rod (311), a base (312) connected to the outside of the movable sleeve (313), a drive gear (315) disposed inside the base (312) and driven by a motor, and a driven gear (314) meshing with the drive gear (315), so that when the drive gear (315) rotates, it drives the driven gear (314) and the movable sleeve (313) to rotate, and causes the movable sleeve (313) to move along the outside of the threaded rod (311). The second movable frame (32) and the third movable frame (33) are both provided with the same displacement structure as the first movable frame (31).

3. The intelligent spraying equipment for large-scale production of coated wood veneer cabinets according to claim 1, characterized in that: The valve core (45) includes a valve seat (451) and a valve plug (452). A number of valve channels (453) are provided on the outer side of the valve seat (451). The paint can be transferred to the interior of the auxiliary spray gun (4) through the valve channels (453). By moving the valve plug (452), part of the space through the valve channels (453) can be blocked.

4. The intelligent spraying equipment for mass production of coated wood veneer cabinets according to claim 1, characterized in that: The third movable frame (33) also includes a transmission bar (331) connected to one side of the first movable frame (31), a driven bar (332) connected to the other side of the first movable frame (31), and a gear set (333) for driving the transmission bar (331) and the driven bar (332). The bottom end of the driven bar (332) is connected to the top of the valve plug (452).

5. The intelligent spraying equipment for large-scale production of coated wood veneer cabinets according to claim 1, characterized in that: The auxiliary spray gun (4) also includes a nozzle (41), which is located at the bottom of the main cavity of the auxiliary spray gun. The inner wall of the nozzle (41) is provided with an annular air duct (412) at the paint outlet. The outer side of the nozzle (41) is provided with an air inlet (411) connected to one end of the air injection pipe (44) at the opening of the annular air duct (412).

6. An intelligent spraying process for the mass production of coated wood veneer cabinets, characterized in that, The intelligent spraying equipment for mass production of coated wood veneer cabinets as described in any one of claims 1-5 specifically includes the following steps: S1: Large board pretreatment involves cutting, veneer cutting, veneer splicing, veneer application, and wire drawing of the raw board in sequence. Then, the wood veneer is tightly bonded to the raw board through cold or hot pressing to obtain the pretreated large board. S2: Pre-coated UV primer: The pre-treated large board is transported to the UV roller coating area, and UV primer is uniformly coated on the entire surface of the large board by roller coating equipment to obtain a pre-coated UV primer large board; S3: Cutting and edge banding. Cut the pre-coated UV base board according to the size of the cabinet parts. Band the edges of the cut parts. After banding, use a sanding machine to sand the surface of the parts and the banded area to remove burrs and defects. S4: Intelligent spraying, the polished plate is transported to the conveyor belt (11) of the spraying chamber (12), the shift frame (2) is started to drive the main spray gun (21) to move back and forth along the top of the spraying chamber (12) to carry out large-scale basic spraying on the surface of the component; S5: Precise touch-up coating. The laser contour sensor scans the surface of the board after the basic spraying and focuses on identifying the spraying edge of the main spray gun (21). The auxiliary spray gun (4) is used to spot coat or touch up the target area. S6: Color correction and topcoat. After the parts are touched up, they are color corrected to meet the design standards. Then, water-based topcoat is sprayed again through the main spray gun (21). Finally, the parts are sent to the drying room to complete the coating.

7. The intelligent spraying process for mass production of coated wood veneer cabinets according to claim 6, characterized in that: In step S2, a constant temperature roller coating method is used during UV roller coating to avoid the uniformity of roller coating caused by changes in the viscosity of UV primer due to temperature fluctuations. In step S6, the drying room adopts a segmented drying method, first drying at a lower temperature and then increasing the temperature to continue drying, to avoid defects in the topcoat due to sudden temperature changes.

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