A paint spraying device

Abstract

The application discloses a paint spraying device and relates to the technical field of spraying, and aims to solve the technical problem that main spraying and supplementary spraying are separately performed in the prior art profile spraying, a large amount of cost or labor workload is increased, and spraying efficiency is reduced. The application comprises an auxiliary spraying device, the auxiliary spraying device is connected with a powder spraying gun part in a powder room through a connecting part, and the distance from the end of the powder spraying gun part is 5-10 mm. The auxiliary spraying device comprises a separation part arranged on the powder spraying gun part, the separation part is used for shunting the powder sprayed by the powder spraying gun part, and the shunted paint comprises main flow for spraying the profile in a large area and auxiliary flow for spraying the details of the recesses of the profile which are not opposite to the powder spraying gun part. The separation part is connected with an adjusting part, the adjusting part is used for adjusting the position of the separation plate relative to the nozzle of the powder spraying gun part. The auxiliary spraying device is provided with a flow guiding part matched with the separation part, and the flow guiding part and the separation part form the auxiliary flow. The application can simultaneously perform main spraying and supplementary spraying, improves the spraying efficiency and effect, simultaneously reduces the equipment cost, and has high economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of spraying technology, and specifically relates to a paint spraying device. Background Technology

[0002] During the spraying process, the profile surface is prone to defects such as uneven paint film thickness, local missed spraying, and insufficient coating coverage due to factors such as the profile's irregular cross-section, obstruction by conveying equipment, airflow turbulence, dead corners, and overlapping gaps. A separate respraying station is required to spray the defective areas a second time.

[0003] To address the aforementioned issues, existing profile coating production lines employ a segmented approach, with main coating stations and independent touch-up coating stations. Profiles undergo primary coating to achieve a large overall area coverage before being transported via a track to the downstream touch-up coating station. Missed areas are then touched up manually or by a separate touch-up coating mechanism. However, this method has two drawbacks. First, it requires additional touch-up coating stations, necessitating separate traveling mechanisms, spray guns, and other equipment. This results in a large footprint and high initial investment and maintenance costs. While manual touch-up coating can reduce costs, it still consumes manpower. Second, transporting the profiles to the touch-up coating station before touch-up coating further prolongs the overall coating process and reduces the continuous processing efficiency of the production line.

[0004] Furthermore, existing equipment cannot achieve synchronous linkage between main spraying and touch-up spraying, making it difficult to complete local touch-up spraying in real time while following the profile's movement. It also cannot complete a full coating coverage in one spraying process, which restricts the automation level and processing quality of the profile spraying production line. Therefore, there is an urgent need for a spraying device that can carry out local touch-up spraying simultaneously with the main spraying operation of the profile to solve the industry pain points such as low efficiency, high equipment cost, and poor coating quality caused by segmented touch-up spraying. Summary of the Invention

[0005] This invention discloses a paint spraying device, which aims to solve the technical problem that the main spraying and touch-up spraying in the existing profile spraying are carried out separately, which greatly increases the cost or manual workload and reduces the spraying efficiency.

[0006] To solve the aforementioned technical problems, the present invention adopts the following technical solution:

[0007] A paint spraying device includes an auxiliary spraying device. The auxiliary spraying device is connected to a spray gun in a powder booth via a connecting part, and is 5-10 mm away from the end of the spray gun. The auxiliary spraying device includes a dividing part disposed on the spray gun, which is used to split the powder sprayed from the spray gun. After splitting, the paint includes a main stream for spraying a large area of ​​the profile and an auxiliary stream for spraying details of the profile not directly facing the recess of the spray gun. The dividing part is connected to an adjusting part, which is used to adjust the position of the dividing part relative to the nozzle of the spray gun. The auxiliary spraying device is provided with a guide part that cooperates with the dividing part to form the auxiliary stream.

[0008] By adopting this technical solution, the device is equipped with a separator to divert the spray gun's end, and an adjustment unit to regulate the size and direction of the main and auxiliary streams. A guide unit works in conjunction with the separator to form the auxiliary stream. On one hand, this device can simultaneously spray large areas and details of the profile while the electrostatic powder is being sprayed from the spray gun, improving both spraying efficiency and coating effect. On the other hand, this device directly incorporates auxiliary spraying near the nozzle, eliminating the need for an additional spraying system or manual assistance, thus reducing labor and equipment costs, resulting in higher economic benefits.

[0009] Preferably, the adjusting part can simultaneously adjust the height and angle position of the dividing part at the end of the spray gun part. The connecting part is provided with a drive motor slot and a first mounting slot. The adjusting part includes a forward and reverse drive motor movably disposed in the drive motor slot. The drive motor is connected to the dividing part through a connecting shaft. The connecting shaft adopts an L-shaped structure, so that the ends of the dividing part and the spray gun part can be set beyond the end of the connecting part. A drive gear is sleeved on the connecting shaft. A rack that cooperates with the drive gear is provided in the connecting part. The rack is movably disposed in the first mounting slot. When the drive gear and the rack mesh, their relative movement causes the drive motor and the rack to slide relative to each other in the first mounting slot.

[0010] After adopting this technical solution, the adjustment unit can simultaneously adjust the height and angle of the dividing part at the end of the spray gun part, so that the height of the dividing part can be adjusted to 1 / 4, 1 / 3, 1 / 2, etc. at the height of the end of the spray gun part, and the angle can be adjusted within 180° on the plane of the end of the spray gun part. For example, the dividing part can be tilted downward at 1 / 4 of the height of the end of the spray gun part to divide the main flow and the auxiliary flow at the end of the spray gun part.

[0011] The arrangement of the drive gear and rack, as well as the first mounting slot and drive motor slot, makes the partition section relatively stable and the structure reliable during this adjustment process.

[0012] Preferably, the connecting part is provided with a fixing device that can fix the rotation angle of the partition part. The fixing device includes a second mounting groove provided in the connecting part, and a locking rod that cooperates with the mounting groove is provided on the connecting shaft. Both the upper and lower ends of the second mounting groove adopt an inclined structure, and the inclined structure is provided with a locking groove that cooperates with the locking rod.

[0013] After adopting this technical solution, the partition part, driven by the drive motor, allows the drive gear and rack to mesh with each other, and the drive lever moves up and down in the second mounting groove. Generally, the drive plate rotates with the drive gear until the lever contacts the top or bottom slot of the second mounting groove, thus fixing the lever. At this time, the partition part also moves to a suitable height position relative to the end face of the spray gun part, forming a suitable angle with the end plane of the spray gun part. While ensuring the efficiency of the main spraying, auxiliary flow replenishment spraying is also performed, taking into account both the efficiency and effect of spraying.

[0014] Preferably, the second mounting slot, the first mounting slot, and the drive motor slot are arranged sequentially from the inside to the outside along the central axis of the spray gun section, and the second mounting slot and the first mounting slot, the first mounting slot and the drive motor slot are separated by a partition, and each partition is provided with a sliding groove that cooperates with the connecting shaft.

[0015] After adopting this technical solution, components such as the second mounting groove are sequentially arranged outward from the center of the connection part, and the positions of each component are reasonably divided, making reasonable use of the internal space of the connection part.

[0016] Preferably, the drive motor drive gear, rack, first mounting slot, and drive motor slot are all provided in twos and are symmetrically arranged on the connecting part, and the drive motor is connected to the connecting shaft through a one-way bearing.

[0017] By adopting this technical solution and symmetrically arranging the drive motor and other components, the eccentric force during operation of the device can be reduced, thereby improving the stability of the device during use.

[0018] Preferably, the connecting part has a cavity, the cavity is connected to a wind generator, the guide part includes a guide ring disposed on the connecting part, the guide ring is connected to the cavity, the guide ring is rotatably connected to a guide plate, and the rack is provided with an opening and closing device that cooperates with the guide plate.

[0019] After adopting this technical solution, the rack moves upward or downward in the first slide groove under the action of the drive gear, which can drive the opening and closing device to contact or disconnect from the guide plate, so that the guide plate can close or open the cavity, preventing the airflow from moving or moving out of the guide ring, so that the auxiliary flow can be accurately applied to a certain surface of the profile that needs to be recoated, resulting in a more precise coating effect.

[0020] Preferably, the opening and closing device includes an opening and closing plate, and the opening and closing plate and the guide plate are provided with mutually cooperating magnetic suction components. When the rack moves, it drives the opening and closing plate to disconnect from the guide plate, so that the guide plate rotates relative to the connecting part under the action of the airflow generated by the air source generator, and the guide plate cooperates to form a guide opening for guiding the airflow.

[0021] After adopting this technical solution, the closing of the guide opening is controlled by the magnetic suction component. On the one hand, the magnetic suction component will not affect the electrical properties of the sprayed powder, thus ensuring the spraying process; on the other hand, the control method is simple and the operation boundary is narrow.

[0022] Preferably, the flow guide is symmetrically arranged on the connecting part, and two opening and closing plates are provided.

[0023] With this technical solution, the guide section and the opening and closing plate are symmetrically arranged on the connecting part. The guide section is adaptively adjusted and opened as the spray gun moves up and down. The structure is simple, stable and reliable.

[0024] Preferably, the connecting part includes a connecting ring, and a locking block that cooperates with the spray gun part is provided inside the connecting ring. The connecting ring is locked with the spray gun part, and the cavity is connected to the air source generator through a telescopic tube.

[0025] By adopting this technical solution, the connecting part is set as a ring structure, and a locking block is set to engage with the spray gun part. The connection method is simple and reliable, and the setting of the locking block further improves the stability of the device during use.

[0026] Preferably, the partition includes a partition plate with a thickness of 0.5-0.1 mm, and the surfaces of the connecting part, partition, guide part, and adjusting part are all covered with an antistatic coating.

[0027] After adopting this technical solution, the surfaces of the connecting part, the partition part, the guide part, and the adjustment part are all covered with an antistatic coating. At the same time, the thickness of the partition plate is limited, which can reduce the impact of paint powder, allowing more paint powder to be used in the spraying process, reducing waste and lowering costs.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] (1) This device is equipped with a dividing section to split the spray gun end, and the size and direction of the main stream and auxiliary stream are adjusted by the adjusting section. At the same time, a guide section is set up to cooperate with the dividing section to form an auxiliary stream. On the one hand, this device can spray the large area and details of the profile at the same time when the electrostatic powder is sprayed from the spray gun, which helps to improve the spraying efficiency and improve the spraying effect. On the other hand, this device is an auxiliary spraying device set directly near the nozzle, without setting up an additional spraying system or a device for manual auxiliary spraying, which can reduce the amount of manual labor and reduce equipment costs, resulting in higher economic benefits.

[0030] (2) The adjustment section can simultaneously adjust the height and angle of the dividing section at the end of the spray gun section, so that the height of the dividing section can be adjusted to 1 / 4, 1 / 3, 1 / 2, etc. at the height of the end of the spray gun section, and the angle can be adjusted within 180° of the plane of the end of the spray gun section. For example, the dividing section can be tilted downward at 1 / 4 of the height of the end of the spray gun section to divide the main flow and auxiliary flow at the end of the spray gun section.

[0031] The arrangement of the drive gear and rack, as well as the first mounting slot and drive motor slot, makes the partition section relatively stable and the structure reliable during this adjustment process.

[0032] (3) Under the drive of the drive motor, the partition makes the drive gear and rack mesh with each other, and the drive lever moves up and down in the second mounting slot. Generally, the drive plate rotates with the drive gear until the lever contacts the slot at the top or bottom of the second mounting slot to fix the lever. At this time, the partition also moves to a suitable height position relative to the end face of the spray gun, forming a suitable angle with the end plane of the spray gun. While ensuring the efficiency of the main spraying, auxiliary spraying is carried out, taking into account both the efficiency and effect of spraying.

[0033] (4) By symmetrically arranging the drive motor and other components, the eccentric force of the device during operation can be reduced, thereby improving the stability of the device during use.

[0034] (5) The connecting part is set as a ring structure and a locking block is set to engage with the spray gun part. The connection method is simple and reliable. At the same time, the setting of the locking block further improves the stability of the device during use. Attached Figure Description

[0035] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0036] Figure 1 This is a schematic diagram showing the connection between an auxiliary coating spraying device and a powder booth according to the present invention;

[0037] Figure 2 This is a three-dimensional structural diagram of an auxiliary coating spraying device according to the present invention;

[0038] Figure 3 This is a cross-sectional view of an auxiliary paint spraying device as seen from above.

[0039] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0040] Figure 5 for Figure 4 A schematic diagram of the shape and structure of the second mounting slot along line B in the middle;

[0041] Figure 6 A schematic diagram of the adjustment section viewed from the front;

[0042] Figure 7 This is a front half-sectional view of the adjustment section and the connecting section;

[0043] Figure 8 This is a schematic diagram showing the position and structure of the flow guide plate and the switch plate.

[0044] Figure Labels

[0045] 1-Powder booth, 2-Spray gun section, 3-Auxiliary spraying device, 4-Connecting ring, 401-Cavity, 402-Guide ring, 5-Guide plate, 6-Separator plate, 7-Adjusting device, 701-Drive motor, 702-Drive motor slot, 703-Connecting shaft, 704-Drive gear, 705-Rack, 706-First mounting slot, 707-Second mounting slot, 708-Clamping rod, 709-Partition plate, 710-Slide groove, 711-Clamping groove, 8-Opening and closing plate, 9-Profile, 10-Telescopic tube. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0047] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing this application 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 application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] The following is combined Figures 1-8 The present invention will be described in detail below.

[0049] Example 1

[0050] A paint spraying device, such as Figures 1-8 As shown, the auxiliary spraying device 3 is connected to the spray gun section 2 inside the powder booth 1 via a connecting part, and the distance between the auxiliary spraying device 3 and the end of the spray gun section 2 is 5-10mm. The auxiliary spraying device 3 includes a dividing part disposed on the spray gun section 2. The dividing part is used to split the powder sprayed from the spray gun section 2. After splitting, the coating includes a main flow covering a large area of ​​the spraying profile 9 and an auxiliary flow covering details in the recessed area of ​​the spraying profile 9 not directly facing the spray gun section 2. The dividing part is connected to an adjusting part, which is used to adjust the position of the dividing part relative to the nozzle of the spray gun section 2. The auxiliary spraying device 3 is provided with a guide part that cooperates with the dividing part. The guide part and the dividing part cooperate to form an auxiliary flow.

[0051] Both the powder booth 1 and the spray gun section 2 are existing structures. The spray gun section 2 generally consists of multiple nozzles arranged side by side, each nozzle connected to a feed pipe. A section of rigid tubing is installed on the outer wall of each feed pipe, initially defining the nozzle position. Then, components such as pipe supports arrange all the rigid tubing, ensuring all nozzles are arranged in a row. The powder booth 1 has inlets on its top and side walls. The profile 9, connected to the suspension device, enters the powder booth 1 through these openings and remains inside. Spray grooves that mate with each nozzle are located on the side walls of the powder booth 1. The entire spray gun section 2, under the action of a reciprocating mechanism, sprays the profile 9 in a reciprocating motion.

[0052] To achieve the connection between the auxiliary spraying device 3 and the spray gun 2, this device is provided with a connecting part on the auxiliary spraying device 3. The connecting part includes a connecting ring 4. The connecting ring 4 is directly sleeved on the spray gun 2 to complete the connection with the spray gun 2. In order to further improve the connection stability between the connecting ring 4 and the spray gun 2, a locking block can also be provided on the connecting ring 4. The shape and structure of the locking block are matched with the shape and structure of the spray gun 2. It is also emphasized that both the locking block and the connecting ring 4 are provided with an antistatic coating to avoid electrostatic powder adhesion and waste.

[0053] In this embodiment, in order not to hinder the spraying on the spray gun 2, the distance between the end of the connecting ring 4 and the end of the paint sprayed on the spray gun 2 is 10mm. When the paint is sprayed out from the spray gun 2, it will spread from the end of the spray gun 2, which is the same as the existing paint spraying path.

[0054] The separator includes a separator plate 6, which is a thin plate with a thickness of 0.1 mm. The plane on which all nozzles spray powder is defined as the spray surface. The separator plate 6 can rotate within 180° on the spray surface. When the separator plate 6 is perpendicular to the nozzle, the main and auxiliary streams sprayed from the spray surface overlap, resulting in large-area spraying of the profile 9. When the separator plate 6 is deflected relative to the nozzle, the side of the separator plate 6 with an acute angle to the spray surface becomes the side where the auxiliary stream is formed, and the separator plate 6 guides the powder flow. The side with an obtuse angle becomes the side where the main stream is formed. In this way, the main spray and auxiliary spray can be completed simultaneously during spraying.

[0055] During the reciprocating spraying process of the spray gun 2, the recesses or areas requiring respraying on the profile 9 are at an angle to the vertical axis during the downward and upward movements. Respraying should be performed towards this angle to achieve better spraying results and a more uniform coating. Therefore, the adjustment unit also employs a reciprocating movement structure, which can change the height of the partition plate 6 on the spray surface. For example, the height of the entire partition plate 6 can be adjusted to 1 / 4, 1 / 3, 1 / 2, or 2 / 3 of the total circular surface of the nozzle. Simultaneously, the adjustment unit can adjust the angle of the partition plate 6 relative to the spray surface. For instance, during downward movement, the partition plate 6 should be adjusted to a height of 1 / 4 from the top of the nozzle and tilted towards the ground, with an angle of 20 degrees between the partition plate 6 and the spray surface.

[0056] The adjustment part includes a connecting shaft 703 disposed at both ends of the partition plate 6. The connecting shaft 703 adopts an L-shaped structure, so that the ends of the partition part and the spray gun part 2 can be set beyond the ends of the connecting part. The connecting shaft 703 is connected to a drive motor 701 through a coupling. The drive motor 701 is a forward and reverse drive motor 701. A drive gear 704 is disposed on the connecting shaft 703, and a rack 705 that cooperates with the drive gear 704 is disposed on the connecting ring 4.

[0057] The first end face of the connecting ring 4, which is close to the spray surface, and the second end face, which is far away from the spray surface, are defined. The connecting ring 4 is also divided into an inner ring face and an outer ring face. The locking block is set in the inner ring face and contacts the spray gun part 2.

[0058] The connecting ring 4 adopts a closed ring structure. The side wall of the connecting ring 4 is provided with a first mounting groove 706 for mounting a rack 705. The opening of the first mounting groove 706 is facing away from the first end face, and the first mounting groove 706 is close to the first end face and the inner ring face. The rack 705 is connected to the first mounting groove 706 by a snap-fit ​​method.

[0059] The connecting ring 4 is provided with a drive motor slot 702 for mounting the drive motor 701. The drive motor slot 702 and the drive motor 701 are also connected by a snap-fit ​​method. The drive motor slot 702 and the first mounting slot 706 are separated by a partition 709.

[0060] In this embodiment, after the drive motor 701 is started, the motor shaft of the drive motor 701 is connected to the connecting shaft 703 through a coupling. The drive gear 704 is mounted on the connecting shaft 703, and the drive gear 704 meshes with the rack 705, generating a normal meshing force F. According to Newton's third law (forces act in pairs), the drive gear 704 applies a force F to the rack 705 (pushing the rack 705 to move), and the rack 705 applies a reaction force -F of equal magnitude and opposite direction to the drive gear 704 (pushing the drive motor 704 to move). This can be simply understood as two parallel grooves meshing in the same plane. If the gear rotates clockwise, the rack moves to the right, and the motor moves to the left due to the reaction force; the reverse is also true. Simultaneously, the rotational linear velocity of the gear is equal to the sum of the relative velocities of the motor and the rack. To ensure that the motor and rack move in opposite directions, the friction between them must be considered. Only when their masses and friction are similar will they move in opposite directions at similar speeds.

[0061] The partition plate 709 is provided with a sliding groove 710 that cooperates with the connecting shaft 703. Both the sliding groove 710 and the drive motor groove 702 are set along the height of the connecting ring 4. This is because the drive gear 704 will drive the drive motor 701 and the rack 705 when they mesh. The drive motor 701 and the rack 705 slide in the drive motor groove 702 and the first mounting groove 706 respectively, so that the partition plate 6 changes the angle relative to the spray surface while sliding up and down on the spray surface.

[0062] In order to fix the angle between the partition plate 6 and the spray surface, the device is also provided with a fixing device on the connecting ring 4 to fix the angle. The fixing device includes a second mounting groove 707 provided on the connecting ring 4. The second mounting groove 707 is provided along the height of the connecting ring 4. The second mounting groove 707 is provided close to the first partition surface and the inner ring surface. That is, the second mounting groove 707, the first mounting groove 706 and the drive motor groove 702 are provided sequentially from the inner ring surface to the outer ring surface.

[0063] The second mounting groove 707, the first mounting groove 706, and the drive motor groove 702 are arranged sequentially from the inside to the outside along the central axis of the spray gun part 2. The second mounting groove 707 and the first mounting groove 706, and the first mounting groove 706 and the drive motor groove 702 are separated by partitions 709. Each partition 709 is provided with a sliding groove 710 that mates with the connecting shaft 703. This allows the partition plate 6 to slide up and down relative to the inner annular surface.

[0064] The upper and lower surfaces of the second mounting groove 707 are both inclined, and a slot 711 is provided on the inclined structure. The connecting shaft 703 is provided with a locking rod 708 that cooperates with the slot 711. When the connecting shaft 703 moves to the slot 711, it will enter the slot 711 to complete the fixation, that is, the partition plate 6 moves to the position of forming the auxiliary flow in both height and angle.

[0065] The connecting ring 4 adopts a cavity 401 structure, and the cavity 401 inside the connecting ring 4 is connected to a wind generator through a telescopic tube 10, which can generate airflow.

[0066] The telescopic tube 10 adopts a corrugated tube-like structure, which allows it to extend and retract.

[0067] One end of the telescopic tube 10 passes through the side wall of the powder chamber 1 and is placed outside the powder chamber 1, and then is connected to the air source generator.

[0068] The flow guiding section includes two flow guiding rings 402, which are symmetrically arranged on the upper and lower sides of the connecting ring 4. The airflow can enter the outside through the flow guiding rings 402. At the same time, a flow guiding plate 5 is rotatably connected to the flow guiding rings 402. When the flow guiding plate 5 is closed, the airflow is sealed in the cavity 401 structure. When the flow guiding plate 5 is opened, the airflow enters the outside.

[0069] The rack 705 and the guide plate 5 are provided with mutually cooperating opening and closing devices. The opening and closing devices include opening and closing plates 8 provided at both ends of the rack 705. The connecting ring 4 is provided with a third mounting groove that cooperates with the opening and closing plates 8, and the opening and closing plates 8 can also slide up and down in the third mounting groove.

[0070] The guide plate 5 is connected to the guide ring 402 by means of hinges or pivots, which can form an angle with the guide ring 402. At the same time, the opening and closing plate 8 and the guide plate 5 are respectively provided with mutually cooperating magnetic suction components. Only when the drive motor 701 drives the rack 705 to move up and down will the upper and lower opening and closing plates 8 be driven to disconnect from the upper and lower guide rings 402 respectively, so that the guide ring 402 at the top or bottom can be vented.

[0071] It is emphasized that the existing powder booth 1 and spray gun 2, due to their cooperation with the reciprocating walking mechanism and their sufficient hardness and strength, are able to withstand the suspended weight of an adult male. The additional components of this device can be made of lightweight materials, and the spray gun 2 can fully bear the weight of this device without causing damage to the original use of the spray gun 2.

[0072] In this embodiment, both the drive motor 701 and the air source generator are electrically connected to a controller. The controller can control the forward and reverse rotation of the drive motor 701, as well as the start and stop of the air source generator. The controller adopts an existing structure, including a timer, etc., and controls the timing of the forward and reverse rotation of the drive motor 701. The controller is also connected to a master control switch. Activating the master control switch will simultaneously start the air source generator and control the drive motor 701 according to the timer.

[0073] The specific method of using this invention is as follows:

[0074] Reference Figures 1-8 When using this device, place the air source generator outside the powder chamber 1, and connect the telescopic pipe 10 through the powder chamber 1 to the connecting ring 4. Then, use the connecting ring 4 to attach the device to the front of the spray gun section 2, and place the partition plate 6 at the center of the spray gun.

[0075] Initially, the partition plate 6 is positioned at the center line of the nozzle. As the spray gun 2 moves downward, the drive motor 701 rotates forward, driving the rack 705 upward and opening the lower guide ring 402. The partition plate 6 tilts towards the ground, forming a guide opening for airflow with the opened guide plate 5. The paint above the partition plate 6 is sprayed vertically onto the profile 9. The paint between the partition plate 6 and the guide plate 5 forms a specific angle relative to the vertical plane (15°, 30°, etc.), causing the sprayed paint to be sprayed at a 15° or 30° angle to the recessed area of ​​the profile 9 (e.g., for an I-beam profile, consisting of two horizontal plates and one vertical plate, spraying towards the connection between the horizontal and vertical plates near the ground during the downward movement). Conversely, during the upward movement, an auxiliary flow is formed in another direction through the upper guide plate 5, simultaneously providing additional spraying to the profile 9.

[0076] This device is equipped with a rack 705, a drive gear 704, etc., which adjusts the position and angle of the partition plate 6 at the port of the spray gun 2 during the movement of the spray gun section 2. It can complete the touch-up spraying at the same time during the spraying process, and does not require an additional spray gun system. It can improve the spraying effect while saving manpower and equipment costs.

[0077] Example 2

[0078] This embodiment is basically the same as embodiment 1, except that: 5. The drive motor 701 drives the gear 704, rack 705, first mounting groove 706, and drive motor groove 702 in twos, and is symmetrically arranged on the connecting part. The drive motor 701 is connected to the connecting shaft 703 through a one-way bearing.

[0079] The air unit controls one of the two drive motors 701 to rotate forward and the other to rotate in reverse. When one of them moves, the other one will not provide power due to the presence of a one-way bearing. It can only be driven by the other drive motor 701 to mesh with the rack 705, while the one side does not provide power for direct passive meshing.

[0080] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A paint spraying device, characterized in that: The auxiliary spraying device (3) is connected to the spray gun part (2) in the powder chamber (1) through a connecting part, and the distance from the end of the spray gun part (2) is 5-10mm. The auxiliary spraying device (3) includes a partition part provided on the spray gun part (2). The partition part is used to divide the powder sprayed from the spray gun part (2). After the division, the coating includes the main flow of the spray profile (9) over a large area and the auxiliary flow of the spray profile (9) in the details of the recessed area of ​​the spray gun part (2) not directly opposite to the spray gun part (2). The partition part is connected to an adjustment part, which is used to adjust the position of the partition part relative to the nozzle of the spray gun part (2). The auxiliary spraying device (3) is provided with a guide part that cooperates with the partition part. The guide part and the partition part cooperate to form an auxiliary flow.

2. The paint spraying device according to claim 1, characterized in that: The adjustment part can simultaneously adjust the height and angle position of the partition part at the end of the spray gun part (2). The connecting part is provided with a drive motor groove (702) and a first mounting groove (706). The adjustment part includes a forward and reverse drive motor (701) movably disposed in the drive motor groove (702). The drive motor (701) is connected to the partition part through a connecting shaft (703). The connecting shaft (703) adopts an L-shaped structure, so that the ends of the partition part and the spray gun part (2) can be set beyond the end of the connecting part. A drive gear (704) is sleeved on the connecting shaft (703). A rack (705) that cooperates with the drive gear (704) is provided in the connecting part. The rack (705) is movably disposed in the first mounting groove (706). When the drive gear (704) and the rack (705) mesh, their relative movement causes the drive motor (701) and the rack (705) to slide relative to each other in the first mounting groove (706).

3. The paint spraying device according to claim 2, characterized in that: The connecting part is provided with a fixing device that can fix the rotation angle of the partition. The fixing device includes a second mounting groove (707) provided in the connecting part. The connecting shaft (703) is provided with a locking rod (708) that cooperates with the mounting groove. The upper and lower ends of the second mounting groove (707) are both inclined structures, and the inclined structures are provided with locking grooves (711) that cooperate with the locking rod (708).

4. A paint spraying device according to claim 3, characterized in that: The second mounting slot (707), the first mounting slot (706), and the drive motor slot (702) are arranged sequentially from the inside to the outside along the central axis of the spray gun part (2). The second mounting slot (707) and the first mounting slot (706), the first mounting slot (706) and the drive motor slot (702) are separated by a partition (709). The partition (709) is provided with a sliding groove (710) that cooperates with the connecting shaft (703).

5. A paint spraying device according to any one of claims 2-4, characterized in that: The drive motor (701) has two drive gears (704), racks (705), first mounting slots (706), and drive motor slots (702), which are symmetrically arranged on the connecting part. The drive motor (701) is connected to the connecting shaft (703) through a one-way bearing.

6. A paint spraying apparatus according to any one of claims 1-4, characterized in that: The connecting part is provided with a cavity (401), the cavity (401) is connected to a wind source generator, the guide part includes a guide ring (402) provided on the connecting part, the guide ring (402) is connected to the cavity (401), the guide ring (402) is rotatably connected to a guide plate (5), and the rack (705) is provided with an opening and closing device that cooperates with the guide plate (5).

7. A paint spraying device according to claim 6, characterized in that: The opening and closing device includes an opening and closing plate (8), and magnetic suction components that cooperate with each other are provided on the opening and closing plate (8) and the guide plate (5). When the rack (705) moves, it drives the opening and closing plate (8) to disconnect from the guide plate (5), so that the guide plate (5) rotates relative to the connecting part under the action of the airflow generated by the air source generator. The guide plate (5) cooperates to form a guide opening for guiding the airflow.

8. A paint spraying device according to claim 7, characterized in that: The flow guide is symmetrically arranged on the connecting part, and there are two opening and closing plates (8).

9. A paint spraying device according to claim 6, characterized in that: The connecting part includes a connecting ring (4), and a locking block that cooperates with the spray gun part (2) is provided inside the connecting ring (4). The connecting ring (4) is locked with the spray gun part (2), and the cavity (401) is connected to the air source generator through the telescopic tube (10).

10. A paint spraying apparatus according to any one of claims 1-4, characterized in that: The partition includes a partition plate (6) with a thickness of 0.5-0.1 mm, and the surfaces of the connecting part, partition, guide part and adjusting part are all covered with an antistatic coating.

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