A spraying device for surface treatment of automobile plastic parts

Abstract

The application relates to the field of spraying technology, in particular to a spraying device for surface treatment of automobile plastic parts, which comprises a bottom plate, a placing frame is fixed at the top of the bottom plate, a fixing mechanism and a cleaning mechanism are arranged in the placing frame, a backing plate is fixed at the side of the placing frame, a paint spraying mechanical arm is installed at the top of the backing plate, a first spraying head is installed at one end of the paint spraying mechanical arm, a protective cover is fixed at the top of the bottom plate, a double-shaft motor drives a threaded rod to rotate, when the threaded rod rotates, two threaded blocks are reversely moved in grooves, then the two threaded blocks reversely move with two supporting plates, which is beneficial to adjusting the distance between the two supporting plates to make the distance suitable for the length of the plastic part, then the automobile plastic part such as a front or rear bumper is placed on the top of the supporting plate, then the bottom of the plastic part is in contact with a suction cup, then a gas pump in a hollow seat is started, air in the suction cup is pumped out through an air pipe, and then the suction cup adsorbs and fixes the plastic part.

Description

TECHNICAL FIELD

[0001] The application relates to the field of spraying technology, in particular to a spraying device for surface treatment of automobile plastic parts. BACKGROUND

[0002] One step of surface treatment of automobile plastic parts is surface painting. After the plastic parts are painted, a layer of continuous film firmly attached to the surface is formed, which can prevent chemical or electrochemical reactions between the surface of the vehicle body and the surrounding medium, thereby preventing or delaying the occurrence of phenomena such as rusting and corrosion, effectively prolonging the service life of the vehicle.

[0003] According to the search, the patent with the application number CN214515409U proposes an automobile plastic part spraying device. When in use, the plastic parts can be placed on the grid table. By rotating the second handle, the rubber clamp block clamps the spraying object. The four fixed devices can clamp irregular objects. The spring plays a buffering role to adjust the clamping of the rubber clamp block. The rubber clamp block will not be too tight to damage the spraying object, nor will it be too loose to make the spraying object fall off. After clamping and fixing, spraying can be performed. However, when clamping the spraying object, the position of the plastic part clamped by the rubber clamp block is blocked by the rubber clamp block, which causes the position to be unable to be sprayed during painting, and the plastic part needs to be painted again after painting, which seriously affects the painting efficiency. SUMMARY

[0004] The purpose of the present application is to solve the problem of the rubber clamp block blocking the position of the plastic part clamped by the rubber clamp block, which causes the position to be unable to be sprayed during painting, and the plastic part needs to be painted again after painting, which seriously affects the painting efficiency. The present application provides a spraying device for surface treatment of automobile plastic parts.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a spraying device for surface treatment of automobile plastic parts, comprising: a bottom plate, a placing frame is fixed on the top of the bottom plate, a fixing mechanism and a cleaning mechanism are arranged in the placing frame, a pad plate is fixed on the side of the placing frame, a paint spraying mechanical arm is installed on the top of the pad plate, a first spraying head is installed at one end of the paint spraying mechanical arm, a protective cover is fixed on the top of the bottom plate, and the protective cover covers the placing frame to prevent paint splashing.

[0006] As a further scheme of the present application, the fixing mechanism comprises a groove arranged on the inner side of the placing frame, a threaded rod is rotatably connected in the groove, a threaded block is slidably connected in the groove, the threaded rod penetrates through the threaded block and is rotatably connected with the threaded block, a support plate is fixed at one end of the threaded block, a double-shaft motor is fixed on the outside of the placing frame, and the output end of the double-shaft motor is fixedly connected with one end of the threaded rod.

[0007] As a further scheme of the present application, the top of the support plate is fixed with a hollow seat, a hollow seat is internally mounted with a dual-purpose air pump, the top of the hollow seat is fixed with a suction cup, and the air pump is connected with an air pipe.

[0008] As a further scheme of the present application, the top of the bottom plate is fixed with a box body, the inside of the box body is divided into a first chamber and a second chamber, the top of the box body is mounted with a rotary motor, and the output end of the rotary motor penetrates into the inside of the first chamber and is fixed with stirring blades.

[0009] As a further scheme of the present application, the inside of the placing frame is fixed with a filter screen, the filter screen is used to filter impurities in the falling paint, and the bottom of the placing frame is provided with a discharge pipe.

[0010] As a further scheme of the present application, the cleaning mechanism is used for filtering cleaning and anti-blocking, the bottom of the support plate is fixedly provided with two support blocks, the inside of the two support blocks is rotatably connected with a brush, one end of the brush is fixed with a gear, the inside of the placing frame is fixed with a rack, the gear is located on the top of the rack and is engaged with the rack, the bottom of the support plate is fixed with a scraper, the bottom of the scraper is in contact with the top of the filter screen, and the side edge of the scraper is mounted with a second spray head.

[0011] As a further scheme of the present application, the outside of the threaded rod is provided with two groups of opposite threads, the other end of the double-shaft motor is fixed with a first pulley, the top of the bottom plate is fixed with a vertical plate, the vertical plate is rotatably connected with a second pulley, the first pulley and the second pulley are connected through a belt, the second pulley is fixed with a first air cylinder, and the output end of the first air cylinder penetrates through the second pulley, the vertical plate and is fixed with a rhombic block.

[0012] As a further scheme of the present application, the inside of the placing frame is rotatably connected with a circular shaft, one end of the circular shaft is located outside the placing frame and is provided with a rhombic groove, the outside of the circular shaft is fixed with a pressing block, the bottom of the filter screen is fixed with two rectangular plates, the outside of the first rectangular plate is fixed with a sealing cover, the inside of the sealing cover is mounted with a second air cylinder, and the inside of the second rectangular plate is provided with a slot.

[0013] As a further scheme of the present application, the outside of the box body is provided with two feeding pipes, and the two feeding pipes are respectively communicated with the first chamber and the second chamber.

[0014] As a further embodiment of the present invention, an oil pump and a water pump are installed on the top of the base plate at the position of the box body, the painting robot arm is connected to a first pipe, the water pump is connected to a second pipe, the end of the first pipe is located inside the first compartment and the top of the first pipe is connected to a first nozzle, the end of the second pipe is located inside the second compartment and the top of the second pipe is connected to a second nozzle, and the length of the second pipe is equal to the length of the placement frame.

[0015] The present invention provides a spraying device for surface treatment of automotive plastic parts, which has the following advantages:

[0016] 1. Through the set fixing mechanism, the dual-axis motor is started to drive the threaded rod to rotate. Since the threaded rod has two sets of opposite threads on its outside, when the threaded rod rotates, it will drive the two threaded blocks to move in opposite directions in the groove. Then, the two threaded blocks move in opposite directions, which takes the two support plates in opposite directions. This is beneficial for adjusting the distance between the two support plates to suit the length of the plastic part. Then, the car plastic part, such as the front and rear bumpers, is placed on the top of the support plate. Then, the bottom of the plastic part contacts the suction cup. Then, the air pump inside the hollow seat is started, and the air in the suction cup is extracted through the air pipe. Then, the suction cup adsorbs the plastic part. This application... By fixing the plastic part at the bottom, the plastic part can be sprayed as a whole, effectively solving the problems in the background technology. After fixing, the oil pump and the painting robot arm are started. Then, the oil in the first chamber, especially under the action of the oil pump, enters the first nozzle of the painting robot arm through the first pipe and is sprayed out. The painting robot arm can easily adjust the position of the spraying. The protective cover covers the entire placement frame to prevent paint from splashing. Some of the sprayed paint will fall and then be filtered through the filter screen to remove impurities and stored at the bottom of the placement frame. When the storage amount reaches a certain level, the discharge pipe is opened, and then the paint in the placement frame is collected through the container for the next use, saving costs.

[0017] 2. The cleaning mechanism ensures that the filter screen needs cleaning after a certain period of use. Cleaning should be carried out when there is no paint on the bottom of the placement frame. The water pump starts and injects clean water from the second chamber into the second nozzle through the second pipe. The support plate moves with the second nozzle to spray water and wet the filter screen for subsequent cleaning. The movement of the support plate increases the spray range, and the movement of the support plate also moves the scraper and brush. The movement of the scraper helps to remove impurities from the surface of the filter screen. Because the gear and rack at one end of the brush mesh, the brush will also rotate when it moves, further improving the cleaning effect. Then the second nozzle continues to spray water to wash away the impurities cleaned from the filter screen and let them fall to the bottom of the placement frame. After that, the discharge pipe is opened to discharge the cleaning wastewater, which helps to achieve overall cleaning of the filter screen. Attached Figure Description

[0018] Figure 1The appearance structure schematic diagram provided by the present application;

[0019] Figure 2 The bottom plate top structure schematic diagram provided by the present application;

[0020] Figure 3 The support plate bottom structure schematic diagram provided by the present application;

[0021] Figure 4 The fixing mechanism structure schematic diagram provided by the present application;

[0022] Figure 5 The structure schematic diagram at A provided by the present application;

[0023] Figure 6 The structure schematic diagram at B provided by the present application;

[0024] Figure 7 The placing frame internal structure schematic diagram provided by the present application;

[0025] Figure 8 The box internal structure schematic diagram provided by the present application.

[0026] In the figure: 1, bottom plate; 2, placing frame; 3, fixing mechanism; 301, groove; 302, threaded rod; 303, threaded block; 304, support plate; 305, double-shaft motor; 306, hollow seat; 307, air pump; 308, suction cup; 309, air pipe; 4, cleaning mechanism; 401, support block; 402, brush; 403, gear; 404, rack; 405, scraper; 406, second nozzle; 407, first pulley; 408, vertical plate; 409, second pulley; 410, first air cylinder; 411, rhombus block; 412, round shaft; 413, rhombus groove; 414, pressing block; 415, rectangular plate; 416, sealing cover; 417, second air cylinder; 418, insertion slot; 5, cushion plate; 6, paint spraying mechanical arm; 7, first nozzle; 8, box; 9, first chamber; 10, second chamber; 11, rotary motor; 12, stirring blade; 13, filter screen; 14, feeding pipe; 15, discharging pipe; 16, protective cover. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0028] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "arranging" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances, and the embodiments thereof will be described below according to the overall structure of the present application.

[0029] Referring to Figure 1 , Figure 2 , a spraying device for surface treatment of automobile plastic parts, comprising: a bottom plate 1, a placing frame 2 is fixed on the top of the bottom plate 1, a fixing mechanism 3 and a cleaning mechanism 4 are arranged in the placing frame 2, a cushion plate 5 is fixed on the side of the placing frame 2, a paint spraying mechanical arm 6 is installed on the top of the cushion plate 5, a first spray head 7 is installed on one end of the paint spraying mechanical arm 6, a protective cover 16 is fixed on the top of the bottom plate 1, the protective cover 16 covers the placing frame 2 to prevent paint splashing, the oil pump and the paint spraying mechanical arm 6 are started, then the paint in the first chamber 9 especially under the action of the oil pump enters the first spray head 7 of the paint spraying mechanical arm 6 from the first pipeline and is sprayed out, the paint spraying mechanical arm 6 is convenient for adjusting the position of paint spraying, and the model of the paint spraying mechanical arm 6 is BRTIRSE2013A.

[0030] Referring to Figure 2 , Figure 4 , Figure 5The fixed mechanism 3 comprises a groove 301 arranged on the inner side of the placing frame 2, a threaded rod 302 rotatably connected inside the groove 301, a threaded block 303 slidably connected inside the groove 301, the threaded rod 302 penetrating through the threaded block 303 and being rotatably connected with the threaded block 303, one end of the threaded block 303 being fixedly connected with a supporting plate 304, the outer side of the placing frame 2 being fixedly connected with a double-shaft motor 305, and the output end of the double-shaft motor 305 being fixedly connected with one end of the threaded rod 302, the top of the supporting plate 304 being fixedly connected with a hollow seat 306, the inside of the hollow seat 306 being provided with a gas pump 307 for pumping and discharging, the top of the hollow seat 306 being fixedly connected with a suction disc 308, and the gas pump 307 being connected with an air pipe 309.

[0031] It should be noted that the double-shaft motor 305 is started to drive the threaded rod 302 to rotate, since the outer side of the threaded rod 302 is provided with two groups of opposite threads, when the threaded rod 302 rotates, the two threaded blocks 303 are driven to move reversely in the groove 301, then the two threaded blocks 303 reversely move to reversely move the two supporting plates 304, which is beneficial to adjust the distance between the two supporting plates 304 to be suitable for the length of the plastic part, then the automobile plastic part such as the front and rear bumpers is placed on the top of the supporting plate 304, then the bottom of the plastic part is in contact with the suction disc 308, then the gas pump 307 in the hollow seat 306 is started to pump out the air in the suction disc 308 through the air pipe 309, then the suction disc 308 adsorbs the plastic part, and the plastic part is fixed at the bottom to be sprayed as a whole, which can effectively solve the problems in the background art.

[0032] With reference to Figure 8 The top of the bottom plate 1 is fixedly connected with a box body 8, the inside of the box body 8 is divided into a first chamber 9 and a second chamber 10, the top of the box body 8 is provided with a rotary motor 11, the output end of the rotary motor 11 penetrates into the inside of the first chamber 9 and is fixedly connected with an agitating blade 12, the outer side of the box body 8 is provided with two feeding pipes 14, the two feeding pipes 14 are respectively communicated with the first chamber 9 and the second chamber 10, the top of the bottom plate 1 is provided with an oil pump and a water pump at the position of the box body 8, the spraying mechanical arm 6 is connected with a first pipeline, the water pump is connected with a second pipeline, the end of the first pipeline is located in the inside of the first chamber 9, the top of the first pipeline is connected with the first spraying head 7, the end of the second pipeline is located in the inside of the second chamber 10, and the top of the second pipeline is connected with the second spraying head 406, and the length of the second pipeline is equal to the length of the placing frame 2, the two feeding pipes 14 are convenient for adding paint into the inside of the first chamber 9 and adding clean water into the inside of the second chamber 10, then the rotary motor 11 is started to drive the agitating blade 12 to rotate, which is beneficial to prevent the first pipeline from being blocked by condensation in winter.

[0033] With reference to Figure 3、 Figure 6 The inside of the placing frame 2 is fixed with a filter screen 13 for filtering impurities in the falling paint, the bottom of the placing frame 2 is provided with a discharge pipe 15, the cleaning mechanism 4 is used for cleaning and anti-blocking of the filter screen 13, the supporting plate 304 is fixedly provided with two supporting blocks 401 at the bottom, the inside of the two supporting blocks 401 is rotatably connected with a brush 402, one end of the brush 402 is fixedly connected with a gear 403, the inside of the placing frame 2 is fixedly connected with a rack 404, the gear 403 is located at the top of the rack 404 and is engaged with the rack 404, the bottom of the supporting plate 304 is fixedly connected with a scraper 405, the bottom of the scraper 405 is in contact with the top of the filter screen 13, the side of the scraper 405 is provided with a second nozzle 406, the outside of the threaded rod 302 is provided with two groups of opposite threads, the other end of the double-shaft motor 305 is fixedly connected with a first pulley 407, the top of the bottom plate 1 is fixedly connected with a vertical plate 408, the vertical plate 408 is rotatably connected with a second pulley 409, the first pulley 407 and the second pulley 409 are connected through a belt, the second pulley 409 is fixedly connected with a first air cylinder 410, the output end of the first air cylinder 410 penetrates through the second pulley 409, the vertical plate 408 and is fixedly connected with a rhombus block 411.

[0034] It can be concluded that the filter screen 13 needs to be cleaned after a certain period of use, and the cleaning needs to be carried out without paint at the bottom of the placing frame 2, the water pump starts to inject clean water in the second chamber 10 into the inside of the second nozzle 406 through the second pipeline, the supporting plate 304 moves with the second nozzle 406 to spray water to wet the filter screen 13 for the convenience of the following cleaning, which is beneficial to improve the range of water spraying through the movement of the supporting plate 304, and the supporting plate 304 moves to drive the scraper 405 and the brush 402 to move, the movement of the scraper 405 is beneficial to scrape off the impurities on the surface of the filter screen 13, since the gear 403 at one end of the brush 402 is engaged with the rack 404, when the brush 402 moves, it also rotates, the rotary movement of the brush 402 further improves the cleaning effect, then the second nozzle 406 continues to spray water to flush the impurities cleaned from the filter screen 13 to fall to the bottom of the placing frame 2, and then the discharge pipe 15 is opened to discharge the cleaned wastewater, which is beneficial to realize the overall cleaning of the filter screen 13.

[0035] Referring to Figure 7The inside of the placing frame 2 is rotationally connected with a round shaft 412, one end of the round shaft 412 is located outside the placing frame 2 and is provided with a rhombic slot 413, the outside of the round shaft 412 is fixedly connected with a pressing block 414, the bottom of the filter screen 13 is fixedly connected with two rectangular plates 415, the outside of the first rectangular plate 415 is fixedly connected with a sealing cover 416, the inside of the sealing cover 416 is mounted with a second air cylinder 417, the inside of the second rectangular plate 415 is provided with an insertion slot 418, the output end of the first air cylinder 410 extends into the inside of the rhombic slot 413 with the rhombic block 411, which is helpful for the connection between the first air cylinder 410 and the round shaft 412, then the output end of the second air cylinder 417 extends into the inside of the insertion slot 418, the sealing cover 416 is helpful for the protection of the second air cylinder 417 and the communication between the two rectangular plates 415, the filter screen 13 is made of elastic material and can be reset after deformation, when the double-shaft motor 305 starts, it drives the round shaft 412 and the pressing block 414 to rotate through the belt transmission mode, when the pressing block 414 rotates, it enters between the two rectangular plates 415 and presses the output end of the second air cylinder 417, then with the continuous rotation of the pressing block 414, the filter screen 13 is pulled downward to present a funnel shape, then the output end of the second air cylinder 417 retracts from the insertion slot 418, then the pressing block 414 cannot continue to apply pressure to the output end of the second air cylinder 417, then the filter screen 13 is reset and reciprocally rebounds, the impurities blocking the mesh of the filter screen 13 are bounced out through the rebound effect, which is helpful for the purpose of preventing blockage.

[0036] Working principle: through two feed pipe 14 facilitate to the first chamber 9 inside the addition of paint, to the second chamber 10 inside the addition of clean water, and then rotate the motor 11 start to drive stirring blade 12 rotation, is conducive to prevent the winter time especially condensation blockage first pipeline, start double shaft motor 305 drive threaded rod 302 rotation, because the threaded rod 302 outside is provided with two groups of opposite thread, so when the threaded rod 302 rotation will drive two threaded block 303 in the groove 301 reverse movement, after two threaded block 303 reverse movement with two support plate 304 reverse movement, is conducive to adjust the distance between the two support plate 304 makes it suitable for the length of plastic parts, after the car plastic parts such as front and rear bumpers to the top of support plate 304, then the bottom of the plastic parts and suction cup 308 contact, after the air pump 307 inside the hollow seat 306 start, through the air pipe 309 will be the air in the suction cup 308, after the suction cup 308 will be adsorbed plastic parts, the bottom of the plastic parts in this application can be fixed, so that the plastic parts are sprayed to the whole, after the fixed oil pump and paint spraying mechanical arm 6 start, then the first chamber 9 especially under the action of oil pump from the first pipeline into the first spray head 7 of paint spraying mechanical arm 6 and spray out, paint spraying mechanical arm 6 is convenient for adjusting the position of paint spraying, protective cover 16 will cover the whole frame 2 to prevent paint splashing, part of the sprayed paint will fall down and then filter out the impurities in the filter screen 13 and store in the bottom of the frame 2, when the storage capacity reaches a certain degree, open the discharge pipe 15, then collect the paint in the frame 2 through the container for next time to save cost,

[0037] But the filter screen 13 needs to be cleaned after a certain period of use, cleaning needs to be carried out without paint at the bottom of the frame 2, the water pump starts to inject clean water in the second chamber 10 into the second spray head 406 through the second pipeline, the support plate 304 moves with the second spray head 406 to spray water to wet the filter screen 13 for the next cleaning, which is conducive to improving the range of water spraying by moving the support plate 304, and the support plate 304 moves will drive the scraper 405 and brush 402 to move, the movement of the scraper 405 is conducive to scraping the impurities on the surface of the filter screen 13, because the gear 403 at one end of the brush 402 is engaged with the rack 404, so when the brush 402 moves, it will also rotate, the rotating movement of the brush 402 further improves the cleaning effect, then the second spray head 406 continues to spray water to clean the impurities on the filter screen 13 and falls to the bottom of the frame 2, then the discharge pipe 15 is opened to discharge the cleaned wastewater, which is conducive to realizing the overall cleaning of the filter screen 13,

[0038] When the mesh of the filter screen 13 is blocked, the output end of the first cylinder 410 extends into the interior of the rhombic slot 413 with the rhombic block 411, which facilitates the connection of the first cylinder 410 and the circular shaft 412, and then the output end of the second cylinder 417 extends into the interior of the insertion slot 418, and the sealing cover 416 is beneficial to the protection of the second cylinder 417 and the communication of the two rectangular plates 415; the filter screen 13 is made of elastic material and can be reset after deformation; when the double-shaft motor 305 starts, the circular shaft 412 and the pressing block 414 are driven to rotate through the belt transmission mode; when the pressing block 414 rotates, it enters between the two rectangular plates 415 and presses the output end of the second cylinder 417, and then, with the continuous rotation of the pressing block 414, the filter screen 13 is pulled downward to present a funnel shape; then the output end of the second cylinder 417 is retracted from the insertion slot 418, and then the pressing block 414 cannot continue to apply pressure to the output end of the second cylinder 417; then the filter screen 13 is reset and reciprocally rebounds, and the impurities blocking the mesh of the filter screen 13 are ejected through the rebound effect, which is beneficial to the anti-blocking purpose.

[0039] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A spraying apparatus for surface treatment of automotive plastic parts, comprising: The base plate (1) is characterized in that: a placement frame (2) is fixed on the top of the base plate (1), a fixing mechanism (3) and a cleaning mechanism (4) are provided inside the placement frame (2), a pad (5) is fixed on the side of the placement frame (2), a painting robot arm (6) is installed on the top of the pad (5), a first spray nozzle (7) is installed at one end of the painting robot arm (6), and a protective cover (16) is fixed on the top of the base plate (1), the protective cover (16) covers the placement frame (2) to prevent paint from splashing; The fixing mechanism (3) includes a groove (301) provided inside the placement frame (2), a threaded rod (302) is rotatably connected inside the groove (301), a threaded block (303) is slidably connected inside the groove (301), the threaded rod (302) passes through the threaded block (303) and is rotatably connected to the threaded block (303), a support plate (304) is fixed at one end of the threaded block (303), and a dual-axis motor (305) is fixed outside the placement frame (2), and the output end of the dual-axis motor (305) is fixedly connected to one end of the threaded rod (302). The placement frame (2) is equipped with a filter screen (13) inside, which is used to filter impurities in the fallen paint. The bottom of the placement frame (2) is provided with a discharge pipe (15). The cleaning mechanism (4) includes a support plate (304) with two support blocks (401) fixedly installed at the bottom. A brush (402) is rotatably connected inside the two support blocks (401). A gear (403) is fixed at one end of the brush (402). A rack (404) is fixed inside the placement frame (2). A scraper (405) is fixed at the bottom of the support plate (304). A second nozzle (406) is installed on the side of the scraper (405). The threaded rod (302) has two sets of opposite threads on its outside. The other end of the dual-axis motor (305) is fixed with a first pulley (407). The top of the base plate (1) is fixed with a vertical plate (408). The vertical plate (408) is rotatably connected with a second pulley (409). The first pulley (407) and the second pulley (409) are connected by a belt. The second pulley (409) is fixed with a first cylinder (410). The output end of the first cylinder (410) passes through the second pulley (409) and the vertical plate (408) and is fixed with a rhombus block (411). The placement frame (2) is rotatably connected to a round shaft (412). One end of the round shaft (412) is located outside the placement frame (2) and is provided with a diamond-shaped groove (413). A pressure block (414) is fixed to the outside of the round shaft (412). Two rectangular plates (415) are fixed to the bottom of the filter screen (13). A sealing cover (416) is fixed to the outside of the first rectangular plate (415). A second cylinder (417) is installed inside the sealing cover (416). A slot (418) is provided on the inner side of the second rectangular plate (415). The output end of the first cylinder (410) extends out and enters the interior of the diamond-shaped groove (413) with the diamond-shaped block (411), which facilitates the connection between the first cylinder (410) and the round shaft (412). Then, the output end of the second cylinder (417) extends out and inserts into the interior of the slot (418). The sealing cover (414) is closed. 6) It is beneficial to protect the second cylinder (417) and to connect the two rectangular plates (415). The filter screen (13) is made of elastic material and can be reset after deformation. When the dual-axis motor (305) starts, it will drive the round shaft (412) and the pressure block (414) to rotate through the belt drive. When the pressure block (414) rotates, it enters between the two rectangular plates (415) and presses the output end of the second cylinder (417). Then, as the pressure block (414) continues to rotate, it will pull the filter screen (13) down to make it funnel-shaped. After that, the output end of the second cylinder (417) retracts and leaves the slot (418). Then the pressure block (414) can no longer apply pressure to the output end of the second cylinder (417). Then the filter screen (13) is elastically reset and reciprocates. Through the rebound action, the impurities blocking the mesh of the filter screen (13) are ejected.

2. The spraying device for surface treatment of automotive plastic parts according to claim 1, characterized in that, A hollow seat (306) is fixed to the top of the support plate (304). A dual-purpose air pump (307) for both extraction and exhaust is installed inside the hollow seat (306). A suction cup (308) is fixed to the top of the hollow seat (306). An air pipe (309) is connected to the air pump (307).

3. The spraying apparatus for surface treatment of automotive plastic parts according to claim 1, characterized in that, The top of the base plate (1) is fixed with a box (8), the inside of the box (8) is divided into a first chamber (9) and a second chamber (10), a rotary motor (11) is installed on the top of the box (8), and the output end of the rotary motor (11) extends into the inside of the first chamber (9) and is fixed with a stirring blade (12).

4. The spraying apparatus for surface treatment of automotive plastic parts according to claim 3, characterized in that, The box (8) is provided with two feed pipes (14) on its outside, and the two feed pipes (14) are respectively connected to the first chamber (9) and the second chamber (10).

5. The spraying apparatus for surface treatment of automotive plastic parts according to claim 1, characterized in that, An oil pump and a water pump are installed on the top of the base plate (1) at the position of the box (8). The painting robot arm (6) is connected to a first pipe, and the water pump is connected to a second pipe. The end of the first pipe is located inside the first chamber (9) and the top of the first pipe is connected to the first nozzle (7). The end of the second pipe is located inside the second chamber (10) and the top of the second pipe is connected to the second nozzle (406). The length of the second pipe is equal to the length of the placement frame (2).

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