Environment-friendly plate coating system

Abstract

The present application relates to the technical field of plate processing, and discloses an environment-friendly plate coating system, which comprises a spraying chamber, and placing racks are arranged on the two sides of the spraying chamber; a transfer frame is slidably connected to the placing racks; a guide rail for the sliding connection of the transfer frame is arranged in the spraying chamber; a mechanical arm is slidably connected to the spraying chamber; the mechanical arm comprises a support frame, a first supporting part is rotatably connected to the support frame, a second supporting part is hingedly connected to the lower end of the first supporting part, a spraying part is hingedly connected to the lower end of the second supporting part, a connecting rod assembly for the folding of the second supporting part and the spraying part of the mechanical arm is arranged on the support frame, a hook is arranged on the spraying part, and a connecting hole is arranged on the transfer frame. The present application has the following advantages and effects: the plate is painted in the spraying chamber, the paint is blocked in the spraying chamber and cannot spread outward, the environment is friendly, the feeding and discharging and the spraying are automatically completed by the mechanical arm, manual operation is not needed, the paint cannot cause harm to the human body, and the present application is an environment-friendly plate coating system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate processing, in particular to an environment-friendly plate coating system. BACKGROUND

[0002] The plate is a standard size flat rectangular building material plate, which is applied to the construction industry to serve as a component of wall, ceiling or floor, and is specifically divided into thin plate, medium plate, thick plate, extra-thick plate, and is usually made into a standard size flat rectangular building material plate.

[0003] At present, most of the plate spraying is still manual spraying, which is low in efficiency and has a great impact on the health of the operators due to long-term contact with the coating. A plate spraying device is disclosed in Chinese Patent No. CN113414031B, which comprises a plate conveying mechanism, a plurality of plate support modules, a spray extraction mechanism, an industrial camera, and a paint spraying mechanism. However, the plate spraying device can only spray the upper surface of the plate, and the side edges of the plate used for making furniture also need to be sprayed, so an automatic spraying system with adjustable spray head position is needed. SUMMARY

[0004] The purpose of the present application is to provide an environment-friendly plate coating system that can automatically spray the surface and side of the plate, is pollution-free to the environment, and can automatically feed and discharge.

[0005] The above technical purpose of the present application is achieved by the following technical solution: an environment-friendly plate coating system, comprising a spraying chamber, the spraying chamber is provided with a placing rack on both sides, the placing rack is slidably connected with a transfer frame, the spraying chamber is provided with a guide rail for slidably connecting the transfer frame, a mechanical arm is slidably connected to the spraying chamber, the mechanical arm comprises a support frame slidably connected to the spraying chamber, a first supporting part is rotatably connected to the support frame, a second supporting part is hingedly connected to the lower end of the first supporting part, a spraying part is hingedly connected to the lower end of the second supporting part, a connecting rod assembly is provided on the support frame to drive the second supporting part and the spraying part to bend, a hook is provided on the spraying part, a connecting hole is provided on the transfer frame, when the second supporting part and the spraying part bend, the hook can be embedded in the connecting hole.

[0006] By adopting the above technical solution, when spraying a plate, the plate is first placed on the transfer rack within the storage rack. The robotic arm can then transfer the transfer rack from the storage rack to the spray chamber. The robotic arm includes a support frame, a first support portion, a second support portion, and a spraying portion. The connecting rod assembly drives the second support portion and the spraying portion to bend. When the second support portion and the spraying portion bend, the spraying portion can extend out of the spray chamber and connect with the transfer rack. The robotic arm can then be moved to transfer the transfer rack into the spray chamber. Then, when the second support portion and the spraying portion are vertically downward, the paint spray bottle on the spraying portion can spray the plate.

[0007] The present invention is further configured as follows: the connecting rod assembly includes a connecting rod 1 rotatably connected to the first supporting portion, a driving motor driving the connecting rod 1 to rotate, the other end of the connecting rod 1 is hinged to a connecting rod 2, the other end of the connecting rod 2 is slidably connected to the second supporting portion, the connecting rod 2 is hinged to a connecting rod 3 at the connection between the second supporting portion, and the other end of the connecting rod 3 is hinged to the spraying portion.

[0008] By adopting the above technical solution, the driving motor drives the connecting rod 1 to rotate, and the connecting rod 1 drives the lower end of the connecting rod 2 to move. The lower end of the connecting rod 2 is slidably connected to the second supporting part. The movement of the lower end of the connecting rod 2 can drive the second supporting part to bend. The two ends of the connecting rod 3 are respectively hinged on the second supporting part and the spraying part. When the second supporting part bends, the spraying part can be driven to bend through the connecting rod 3.

[0009] The present invention is further configured as follows: a slide groove is provided on the second supporting portion, a slider is slidably connected in the slide groove, the second connecting rod and the third connecting rod are both hinged to the slider, when the slider is located at the upper end of the slide groove, the second supporting portion is bent, and the spraying portion is parallel to the horizontal plane; when the slider is located at the lower end of the slide groove, the second supporting portion and the spraying portion are both vertically downward.

[0010] The present invention is further configured as follows: a spring 1 is provided on the slide groove, and the elastic force of the spring 1 drives the slider to move downward. When the slider is connected to the lower end of the slide groove, the second supporting part and the spraying part are both vertically downward.

[0011] The present invention is further configured as follows: a first limit block is provided at the upper end of the first support part, and two limit blocks are provided on the second support part. When the first limit block is connected to the second support part, the second support part bends upward, and when the second limit block is connected to the first support part, the second support part is vertically downward.

[0012] When the second supporting part is bent to meet the first limit block, the connecting rod one continues to drive the connecting rod two to move upward. At this time, the slider moves upward along the slide groove, driving the connecting rod three to move, thereby bending the spraying part; when the driving motor drives the connecting rod one to rotate downward, the slider first slides downward under the action of the spring one, causing the connecting rod three to drive the spraying part to rotate downward so that the spraying part is parallel to the second supporting part; after the slider moves to the bottom of the slide groove, it continues to rotate the connecting rod one. After the connecting rod one rotates to vertically downward, the connecting rod two and the second supporting part and the spraying part are all vertically downward. At this time, the second limit block is connected to the first supporting part, which is conducive to the second supporting part maintaining a vertical state.

[0013] The present invention is further configured as follows: a third limiting block is provided at the lower end of the second supporting portion, and when the spraying portion is connected to the third limiting block, the spraying portion is parallel to the horizontal plane.

[0014] By adopting the above technical solution, a third limit block is provided at the lower end of the support part, which is conducive to keeping the spraying part parallel to the horizontal plane.

[0015] The present invention is further configured as follows: the spraying part includes a connecting frame hinged at the lower end of the second supporting part, a hook is provided at the lower end of the connecting frame, a paint bottle is fixedly connected to the connecting frame, and when the connecting frame is parallel to the horizontal plane, the hook opens upward and the paint spraying direction of the paint bottle is downward.

[0016] By adopting the above technical solution, when feeding, the robotic arm moves to the side of the spray chamber close to the feeding rack, and the connecting rod assembly drives the spray part to bend upward. The hook on the spray part is embedded in the connecting hole of the transfer rack during the upward bending process. When the robotic arm moves into the spray chamber again, the transfer rack can slide into the spray chamber along the guide rail; after the transfer rack moves into the spray chamber, the connecting rod assembly drives the spray part to move downward so that the spray part is parallel to the second supporting part. At this time, the spraying direction of the spray bottle is obliquely downward, which can make the paint spraying range wider and the paint spraying more evenly compared to the vertical downward spraying of the spray bottle. When it is necessary to spray paint on the side of the plate, the connecting rod assembly drives the second supporting part and the spray part vertically downward. At this time, the spraying direction of the spray bottle is parallel to the horizontal plane, which is convenient for spraying paint on the side of the plate.

[0017] The present invention is further configured as follows: the transfer frame includes a base frame, a roller is provided at the lower end of the base frame, a plurality of support bars are provided in the center of the base frame, the height of the support bars is higher than the height of the base frame, a connection hole for the hook to be embedded is provided on one side of the base frame, and a push block is provided on the other side.

[0018] By adopting the above technical solution, the plates are placed on the support bars of the transfer rack, so that the sides of the plates are suspended, which is conducive to painting the sides of the plates. Connection holes are provided on the base frame to facilitate the robotic arm to transfer the transfer rack and the plates to the spraying room. After spraying is completed, the robotic arm rotates and can push the push block to push the transfer rack and the plates out.

[0019] The present invention is further configured as follows: sealing windows are slidably connected to both sides of the spraying chamber near the placement rack, a cylinder is provided in the spraying chamber for driving the sealing windows to move up and down, a block is slidably connected to the guide rail, a guide wheel is rotatably connected to the spraying chamber, the lower end of the sealing window is connected to the lower end of the block by a connecting rope, the middle part of the connecting rope is wrapped around the guide wheel, a second spring is provided under the block, and the elastic force of the second spring drives the block to move upward.

[0020] By adopting the above technical solution, sealed windows are provided on both sides of the spray chamber. When feeding or discharging materials, the cylinder drives the sealed windows to open, which is convenient for the transfer rack and plates to enter and exit. When spraying, the sealed windows are closed, so that the painting is carried out in a semi-closed environment, avoiding the paint from volatilizing to other places and polluting the working environment.

[0021] The present invention is further configured as follows: both ends of the support frame are slidably connected above the spray chamber, the spray chamber is provided with a linear driving component 1 that drives the support frame to move along the X-axis, the support frame is slidably connected with a support plate 1, the support frame is provided with a linear driving component 2 that drives the support plate 1 to move along the Y-axis, the support plate 1 is slidably connected with a support plate 2, the support plate 1 is provided with a linear driving component 3 that drives the support plate 2 to move along the Z-axis direction, and the support plate 2 is provided with a rotating motor that drives the support part 1 to rotate.

[0022] By adopting the above technical solution, linear drive component 1, linear drive component 2 and linear drive component 3 can drive the robotic arm to move along the X-axis, Y-axis and Z-axis directions, so that the robotic arm can drive the spray bottle to spray the entire plane and side of the plate. A motor is provided on the support plate to drive the support part 1 to rotate, which is convenient for driving the robotic arm to rotate and spray the four sides of the plate.

[0023] The beneficial effects of the present invention are:

[0024] 1. The paint system in the application comprises a spraying chamber, a plate is painted in the spraying chamber, paint is blocked in the spraying chamber and cannot spread to the outside, is friendly to the environment, and the feeding and discharging and spraying are automatically completed by a mechanical arm without manual operation, paint cannot cause harm to the human body, and the plate paint system is an environmentally friendly plate paint system.

[0025] 2. The mechanical arm comprises a first supporting part, a second supporting part and a spraying part, the second supporting part and the spraying part can be bent through a connecting rod assembly, when the plate enters or exits the spraying chamber, the connecting rod assembly drives the second supporting part and the spraying part to bend, the hook of the spraying part extends out of the spraying chamber to transfer the plate, when the plate is sprayed on the upper surface, the connecting rod assembly drives the second supporting part to bend, the spraying direction of the paint bottle is obliquely downward, and the spraying of paint is more uniform, when the plate is sprayed on the side, the connecting rod assembly drives the second supporting part and the spraying part to be vertically downward, the spraying direction of the paint bottle is along the horizontal direction, and the plate side is sprayed through the linear driving assembly one, the linear driving assembly two and the linear driving assembly three. Through the control of the connecting rod assembly on the mechanical arm, the mechanical arm can realize the feeding and discharging of the plate, the spraying of the plate surface and the spraying of the plate side, is convenient to operate and has high automation. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0027] Figure 1 is a structural schematic diagram of the application.

[0028] Figure 2 is a sectional schematic diagram of the application.

[0029] Figure 3 is a schematic diagram of the bending state of the second supporting part and the spraying part of the mechanical arm.

[0030] Figure 4 is a schematic diagram of the position relationship of the mechanical arm, the second limiting block, the third limiting block and the connecting rod assembly.

[0031] Figure 5 is a schematic diagram of the bending state of the spraying part of the mechanical arm.

[0032] Figure 6 is a schematic diagram of the vertical state of the first supporting part, the second supporting part and the spraying part of the mechanical arm.

[0033] Figure 7 is a schematic diagram of the structure of the transfer frame.

[0034] In the figure, 1. spraying room; 101. guide rail; 102. sealing window; 103. cylinder; 104. stopper; 105. guide wheel; 106. connecting rope; 107. second spring; 2. placement rack; 3. transfer rack; 301. connecting hole; 302. bottom frame; 303. roller; 304. support bar; 4. lifting frame; 5. robotic arm; 501. support frame; 502. first supporting part; 503. second supporting part; 504. spraying part; 505. hook ; 506, slide; 507, slider; 508, spring one; 509, first limit block; 510, second limit block; 511, third limit block; 512, spray bottle; 6, connecting rod assembly; 601, connecting rod one; 602, drive motor; 603, connecting rod two; 604, connecting rod three; 7, linear drive component one; 8, linear drive component two; 9, linear drive component three; 10, rotating motor; 11, support plate one; 12, support plate two; 13, plate. DETAILED DESCRIPTION

[0035] The technical solutions of the present invention will be described clearly and completely below with reference to specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0036] Example: An environmentally friendly sheet material coating system, such as Figure 1 、 Figure 2 As shown, it includes a spraying chamber 1, with placement racks 2 on both sides of the spraying chamber 1, transfer racks 3 are slidably connected to the placement racks 2, multi-layer transfer racks 3 are provided in the placement racks 2, and a lifting rack 4 is provided under the placement racks 2. A guide rail 101 for sliding connection of the transfer rack 3 is provided in the spraying chamber 1, and a mechanical arm 5 is slidably connected to the spraying chamber 1. The mechanical arm 5 includes a support frame 501 slidably connected to the spraying chamber 1, a first support portion 502 is rotatably connected to the support frame 501, a second support portion 503 is hinged at the lower end of the first support portion 502, and a spraying portion 504 is hinged at the lower end of the second support portion 503, and a connecting rod assembly 6 for driving the second support portion 503 and the spraying portion 504 of the mechanical arm 5 to bend is provided on the support frame 501, a hook 505 is provided on the spraying portion 504, and a connecting hole 301 is provided on the transfer rack 3. When the second support portion 503 and the spraying portion 504 are bent, the hook 505 can be embedded in the connecting hole 301.

[0037] When spraying the plate 13, the plate 13 is first placed on the transfer rack 3 inside the placement rack 2. The robotic arm 5 can transfer the transfer rack 3 from the placement rack 2 to the spray chamber 1. The robotic arm 5 includes a support frame 501, a first support portion 502, a second support portion 503, and a spray portion 504. The connecting rod assembly 6 drives the second support portion 503 and the spray portion 504 to bend. When the second support portion 503 and the spray portion 504 are bent, the spray portion 504 can extend out of the spray chamber 1 and connect with the transfer rack 3. Then, the robotic arm 5 can be moved to transfer the transfer rack 3 to the spray chamber 1. Then, when the second support portion 503 and the spray portion 504 are vertically downward, it is convenient for the spray bottle 512 on the spray portion 504 to spray the plate 13. After the plate 13 is sprayed, the spray portion 504 can push the transfer rack 3 out of the spray chamber 1 and push it to another placement rack 2, realizing automatic loading and unloading. When one plate 13 is sprayed, the lifting frame 4 rises, so that the adjacent transfer frame 3 is connected to the guide rail 101 in the spraying room 1 again, and the second plate 13 is sprayed.

[0038] like Figure 3-Figure 6 As shown, the connecting rod assembly 6 includes a connecting rod 1 601 rotatably connected to the first support portion 502, a driving motor 602 driving the connecting rod 1 601 to rotate, the other end of the connecting rod 1 601 is hinged to a connecting rod 2 603, the other end of the connecting rod 2 603 is slidably connected to the second support portion 503, a connecting rod 3 604 is hinged at the junction of the connecting rod 2 603 and the second support portion 503, and the other end of the connecting rod 3 604 is hinged to the spraying portion 504.

[0039] like Figure 4 As shown, the driving motor 602 rotates by driving the connecting rod 1 601, and the connecting rod 1 601 drives the lower end of the connecting rod 2 603 to move. The lower end of the connecting rod 2 603 is slidingly connected to the second support part 503. The movement of the lower end of the connecting rod 2 603 can drive the second support part 503 to bend. The two ends of the connecting rod 3 604 are respectively hinged to the second support part 503 and the spraying part 504. When the second support part 503 bends, the spraying part 504 can be driven to bend through the connecting rod 3 604.

[0040] A slide groove 506 is provided on the second supporting portion 503, and a slider 507 is slidably connected in the slide groove 506. The second connecting rod 603 and the third connecting rod 604 are both hinged to the slider 507. When the slider 507 is located at the upper end of the slide groove 506, the second supporting portion 503 is bent and the spraying portion 504 is parallel to the horizontal plane; when the slider 507 is located at the lower end of the slide groove 506, the second supporting portion 503 and the spraying portion 504 are both vertically downward.

[0041] like Figure 3 As shown, a spring 508 is provided on the slide 506, and the elastic force of the spring 508 drives the slider 507 to move downward. When the slider 507 is connected to the lower end of the slide 506, the second supporting part 503 and the spraying part 504 are both vertically downward.

[0042] like Figure 3 、 Figure 4 As shown, a first limit block 509 is provided on the upper end of the first support part 502, and two limit blocks are provided on the second support part 503. When the first limit block 509 is connected to the second support part 503, the second support part 503 bends upward. When the second limit block 510 is connected to the first support part 502, the second support part 503 is vertically downward.

[0043] The second link 603 and the third link 604 are both hinged to the slider 507. The slider 507 is slidably connected to the slide groove 506 of the second support portion 503. The spring 1 508 exerts downward pressure on the slider 507. Therefore, when the driving motor 602 drives the first link 601 to rotate, the first link 601 drives the second link 603 to move upward. The position of the slider 507 remains unchanged under the action of the spring 1 508. The second link 603 lifts the second support portion 503 through the slider 507. At this time, the relative positions of the third link 604, the operating portion and the second support portion 503 remain unchanged. When the second support portion 503 bends to connect with the first limit block 509, the first link 601 continues to drive the second link 603 to move upward. At this time, the slider 507 moves upward along the slide groove 506, driving the connecting rod three 604 to move, thereby bending the spraying part 504; when the driving motor 602 drives the connecting rod one 601 to rotate downward, the slider 507 first slides downward under the action of the spring one 508, causing the connecting rod three 604 to drive the spraying part 504 to rotate downward, so that the spraying part 504 is parallel to the second supporting part 503; after the slider 507 moves to the bottom of the slide groove 506, it continues to rotate the connecting rod one 601. After the connecting rod one 601 rotates to vertically downward, the connecting rod two 603, the second supporting part 503, and the spraying part 504 are all vertically downward. At this time, the second limit block 510 is connected to the first supporting part 502, which is conducive to the second supporting part 503 to maintain a vertical state.

[0044] like Figure 4 As shown, a third limiting block 511 is provided at the lower end of the second supporting portion 503 . When the spraying portion 504 is connected to the third limiting block 511 , the spraying portion 504 is parallel to the horizontal plane.

[0045] A third limiting block 511 is provided at the lower end of the supporting portion, which helps to keep the spraying portion 504 parallel to the horizontal plane.

[0046] like Figure 3 As shown, the spraying part 504 includes a connecting frame hinged at the lower end of the second supporting part 503, a hook 505 is provided at the lower end of the connecting frame, and a paint bottle 512 is fixedly connected to the connecting frame. When the connecting frame is parallel to the horizontal plane, the hook 505 opens upward and the paint spraying direction of the paint bottle 512 is downward.

[0047] During feeding, the robotic arm 5 moves to the side of the spraying chamber 1 close to the feeding rack 2, and the connecting rod assembly 6 drives the spraying part 504 to bend upward. The hook 505 on the spraying part 504 is embedded in the connecting hole 301 of the transfer rack 3 during the upward bending process. When the robotic arm 5 moves into the spraying chamber 1 again, the transfer rack 3 can slide along the guide rail 101 into the spraying chamber 1; after the transfer rack 3 moves into the spraying chamber 1, the connecting rod assembly 6 drives the spraying part 504 to move downward, so that the spraying part 504 is parallel to the second supporting part 503. At this time, the paint spraying direction of the spray bottle 512 is obliquely downward. Compared with the vertical downward spraying of the spray bottle 512, the paint spraying range is wider and the paint spraying is more uniform; when it is necessary to spray paint on the side of the plate 13, the connecting rod assembly 6 drives the second supporting part 503 and the spraying part 504 vertically downward. At this time, the paint spraying direction of the spray bottle 512 is parallel to the horizontal plane, which is convenient for spraying paint on the side of the plate 13.

[0048] like Figure 7 As shown, the transfer rack 3 includes a base frame 302, a roller 303 is provided at the lower end of the base frame 302, a plurality of support bars 304 are provided in the center of the base frame 302, the height of the support bars 304 is higher than the height of the base frame 302, a connecting hole 301 for the hook 505 to be embedded is provided on one side of the base frame 302, and a push block is provided on the other side.

[0049] The plate 13 is placed on the support bar 304 of the transfer rack 3, so that the side of the plate 13 is in a suspended state, which is conducive to painting the side of the plate 13. The connection hole 301 is set on the base frame 302 to facilitate the robotic arm 5 to transfer the transfer rack 3 and the plate 13 to the spraying room 1. After spraying is completed, the robotic arm 5 rotates and can push the push block to push the transfer rack 3 and the plate 13 out.

[0050] like Figure 2 As shown, the spray chamber 1 is slidably connected to both sides of the placement rack 2 with sealing windows 102, and a cylinder 103 is provided in the spray chamber 1 to drive the sealing window 102 to move up and down, and a block 104 is slidably connected to the guide rail 101, and a guide wheel 105 is rotatably connected in the spray chamber 1, and the lower end of the sealing window 102 is connected to the lower end of the block 104 by a connecting rope 106, and the middle part of the connecting rope 106 is wrapped around the guide wheel 105, and a spring 2 107 is provided under the block 104, and the elastic force of the spring 2 107 drives the block 104 to move upward.

[0051] Sealed windows 102 are provided on both sides of the spraying room 1. When feeding or discharging materials, the cylinder 103 drives the sealed windows 102 to open, which is convenient for the transfer rack 3 and the plate 13 to enter and exit. When spraying, the sealed windows 102 are closed so that the painting is carried out in a semi-closed environment to prevent the paint from volatilizing to other places and polluting the working environment.

[0052] like Figure 1As shown, both ends of the support frame 501 are slidably connected above the spray chamber 1, and the spray chamber 1 is provided with a linear driving member 7 that drives the support frame 501 to move along the X-axis, and a support plate 11 is slidably connected to the support frame 501, and a linear driving member 2 8 that drives the support plate 11 to move along the Y-axis is provided on the support frame 501, and a support plate 2 12 is slidably connected to the support plate 11, and a linear driving member 3 9 that drives the support plate 2 12 to move along the Z-axis is provided on the support plate 11, and a rotating motor 10 that drives the support part 1 to rotate is provided on the support plate 2 12.

[0053] The linear drive member 1 7, the linear drive member 2 8 and the linear drive member 3 9 can drive the robot arm 5 to move along the X-axis, Y-axis and Z-axis directions, so that the robot arm 5 can drive the paint spray bottle 512 to spray the entire plane and side edges of the plate 13. A motor for driving the support part 1 to rotate is provided on the support plate, which is convenient for driving the robot arm 5 to rotate and spraying the plate 13 around.

Claims

1. An environmentally friendly sheet metal coating system, characterized by: The invention comprises a spraying room (1), wherein two sides of the spraying room (1) are provided with a placing rack (2), a multi-layer transfer rack 3 is provided in the placing rack 2, a lifting rack 4 is provided below the placing rack 2, a transfer rack (3) is slidably connected to the placing rack (2), a guide rail (101) for sliding connection of the transfer rack (3) is provided in the spraying room (1), a mechanical arm (5) is slidably connected to the spraying room (1), and the mechanical arm (5) comprises a support frame (501) slidably connected to the spraying room (1), a first supporting part (502) is rotatably connected to the support frame (501), and the first supporting part (502) is rotatably connected to the first supporting part (502). ) is hinged at the lower end with a second supporting portion (503), and the lower end of the second supporting portion (503) is hinged with a spraying portion (504), and the support frame (501) is provided with a connecting rod assembly (6) for driving the second supporting portion (503) of the mechanical arm (5) and the spraying portion (504) to bend, and the spraying portion (504) is provided with a hook (505), and the transfer frame (3) is provided with a connecting hole (301), when the second supporting portion (503) and the spraying portion (504) are bent, the hook (505) can be embedded in the connecting hole (301), and the connecting rod assembly (6) includes a connecting rod assembly (6) that is rotatably connected to the first supporting portion (503) and the spraying portion (504). The connecting rod 1 (601) on the supporting part (502) and the driving motor (602) for driving the connecting rod 1 (601) to rotate, the other end of the connecting rod 1 (601) is hinged with the connecting rod 2 (603), the other end of the connecting rod 2 (603) is slidably connected to the second supporting part (503), the connecting rod 2 (603) is hinged with the connecting rod 3 (604) at the junction with the second supporting part (503), the other end of the connecting rod 3 (604) is hinged with the spraying part (504), and the spraying part (504) includes a connecting frame hinged at the lower end of the second supporting part (503), and the lower end of the connecting frame is provided with A hook (505) is fixedly connected to the connecting frame with a paint bottle (512). When the connecting frame is parallel to the horizontal plane, the hook (505) opens upward and the paint bottle (512) sprays paint downward. The transfer frame (3) includes a base frame (302). A roller (303) is provided at the lower end of the base frame (302). A plurality of support bars (304) are provided at the center of the base frame (302). The height of the support bars (304) is higher than that of the base frame (302). A connecting hole (301) for the hook (505) to be embedded is provided on one side of the base frame (302), and a push block is provided on the other side.

2. The environmentally friendly sheet material coating system according to claim 1, characterized in that: The second supporting portion (503) is provided with a slide groove (506), and a slider (507) is slidably connected in the slide groove (506). The second connecting rod (603) and the third connecting rod (604) are both hinged to the slider (507). When the slider (507) is located at the upper end of the slide groove (506), the second supporting portion (503) is bent and the spraying portion (504) is parallel to the horizontal plane; when the slider (507) is located at the lower end of the slide groove (506), the second supporting portion (503) and the spraying portion (504) are both vertically downward.

3. The environmentally friendly sheet material coating system according to claim 2, characterized in that: A spring 1 (508) is provided on the slide groove (506), and the elastic force of the spring 1 (508) drives the slider (507) to move downward. When the slider (507) is connected to the lower end of the slide groove (506), the second supporting part (503) and the spraying part (504) are both vertically downward.

4. The environmentally friendly sheet material coating system according to claim 2, characterized in that: A first limiting block (509) is provided at the upper end of the first supporting portion (502), and a second limiting block (510) is provided on the second supporting portion (503). When the first limiting block (509) is connected to the second supporting portion (503), the second supporting portion (503) is bent upwards; when the second limiting block (510) is connected to the first supporting portion (502), the second supporting portion (503) is vertically downwards.

5. The environmentally friendly sheet material coating system according to claim 2, characterized in that: A third limiting block (511) is provided at the lower end of the second supporting portion (503); when the spraying portion (504) is connected to the third limiting block (511), the spraying portion (504) is parallel to the horizontal plane.

6. The environmentally friendly sheet material coating system according to claim 1, characterized in that: The spray chamber (1) is slidably connected to two sides of the placement rack (2) with sealing windows (102), and a cylinder (103) is provided in the spray chamber (1) for driving the sealing window (102) to move up and down. A stopper (104) is slidably connected to the guide rail (101), and a guide wheel (105) is rotatably connected in the spray chamber (1). The lower end of the sealing window (102) is connected to the lower end of the stopper (104) by a connecting rope (106), and the middle part of the connecting rope (106) is wound around the guide wheel (105). A second spring (107) is provided below the stopper (104), and the elastic force of the second spring (107) drives the stopper (104) to move upward.

7. The environmentally friendly sheet material coating system according to claim 1, characterized in that: The two ends of the support frame (501) are slidably connected above the spraying chamber (1); the spraying chamber (1) is provided with a linear driving member (7) for driving the support frame (501) to move along the X-axis; the support frame (501) is slidably connected with a support plate (11); the support frame (501) is provided with a linear driving member (8) for driving the support plate (11) to move along the Y-axis; the support plate (11) is slidably connected with a support plate (12); the support plate (11) is provided with a linear driving member (9) for driving the support plate (12) to move along the Z-axis; the support plate (12) is provided with a rotating motor (10) for driving the support portion (1) to rotate.

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