A dustproof device for an automobile exterior part paint spraying reciprocating machine

Abstract

The present application belongs to the field of automobile exterior part processing technology, and particularly relates to a dustproof device for a paint spraying reciprocating machine for automobile exterior parts, comprising an enclosed frame, the inner side of the enclosed frame is provided with a baffle plate at the front end, and the upper end of the enclosed frame and the baffle plate are attached to the inner wall of the upper side of the door frame of the paint spraying reciprocating machine. The present application realizes the dynamic sealing of the flexible curtain to the moving groove by setting the enclosed frame to seal the side edges and the bottom of the translation beam, setting the dynamic sealing mechanism at the bottom of the enclosed frame, and the cooperation of the two coiled spring winding rollers and the flexible curtain, and the fixed connection of the clamping plate and the paint spraying moving arm. No matter where the paint spraying moving arm is located, the rest of the moving groove is always tightly covered by the flexible curtain, which realizes the effective sealing of the translation beam and the reciprocating mechanism arranged on the translation beam, avoids the adhesion of the escaped paint mist on the reciprocating mechanism during the paint spraying process, effectively prolongs the service life of the reciprocating mechanism, and reduces the maintenance frequency.

Description

Technical Field

[0001] This invention belongs to the field of automotive exterior parts processing technology, specifically relating to a dustproof device for a reciprocating machine for automotive exterior parts painting. Background Technology

[0002] In the production and processing of automotive exterior plastic parts, an automated electrostatic spraying operation is required using a gantry-type reciprocating spraying machine. The reciprocating spraying machine mainly consists of a gantry, a top horizontal beam, a sliding spraying arm, and a bottom spray gun. The spraying arm slides laterally along the horizontal beam to achieve uniform reciprocating movement of the spray nozzle, ensuring the uniformity of the paint film spraying on the workpiece surface.

[0003] During spray painting operations, a large amount of suspended oily paint mist is generated. The paint mist is dispersed upwards by the hot air in the workshop and the spraying airflow, and adheres to the surface of precision transmission components such as the translation beam, transmission screw, drive motor, and sliding guide rail. After the oily paint mist solidifies, it forms hard paint residue, which aggravates the wear of transmission components, causing the paint painting moving arm to slide and jam, deviate, and reduce the accuracy of reciprocating stroke. Ultimately, this results in batch defects such as uneven paint film thickness, streaks, and color differences on automotive exterior parts. At the same time, it significantly shortens the service life of the top precision transmission components and increases equipment maintenance costs.

[0004] In view of this, a dustproof device for a reciprocating machine for painting automotive exterior parts is proposed to protect the reciprocating mechanism of the painting machine. Summary of the Invention

[0005] The purpose of this invention is to provide a long-lasting dustproof device that can adapt to the dynamic reciprocating motion of the painting arm and actively block and collect paint mist.

[0006] The specific technical solution adopted by this invention is as follows: A dustproof device for a reciprocating painting machine for automotive exterior parts includes a closed frame. A blocking plate is fixedly installed at the front end of the inner side of the closed frame. The upper ends of the closed frame and the blocking plate are both in contact with the upper inner wall of the painting reciprocating machine gantry. The rear end of the closed frame is in contact with the rear inner wall of the painting reciprocating machine gantry. A connecting groove is provided at the upper end of the blocking plate. The connecting groove is sleeved on the outside of the translation beam of the painting reciprocating machine. A moving groove is provided on the bottom surface of the closed frame. The painting moving arm on the translation beam is sleeved in the moving groove. The painting moving arm is connected to the dynamic sealing mechanism, which is used to seal the moving groove. The dynamic sealing mechanism is located at the bottom of the sealing frame. An air curtain isolation mechanism is also provided at the bottom of the sealing frame, and the air curtain isolation mechanism is located outside the dynamic sealing mechanism.

[0007] Furthermore, the dynamic closure mechanism includes two fixed boxes, the top surfaces of which are fixedly connected to the bottom surface of the closure frame. Each fixed box is equipped with a coil spring take-up roller, the end of which is rotatably connected to the side plate of the fixed box via a bearing.

[0008] Furthermore, each of the two coil spring take-up rollers is wound with a flexible curtain, and the flexible curtains at both ends extend through two slots to the outside of the two fixed boxes, with the two slots respectively opened on the opposite sides of the two fixed boxes.

[0009] Furthermore, the opposite ends of the two flexible curtains are respectively fixedly connected to the opposite sides of the two sliding plates, the left and right ends of the two sliding plates are respectively slidably connected to the two guide rails, the top surfaces of the two guide rails are fixedly connected to the bottom surface of the enclosure frame, the two guide rails are respectively located on the left and right sides of the moving groove, and the two fixed boxes are respectively located on the front and rear sides of the moving groove.

[0010] Furthermore, the bottom surfaces of the two sliding plates are respectively fixedly connected to the top surfaces of the two connecting plates, and the bottom surfaces of the two connecting plates are respectively fixedly connected to the top surfaces of the two clamping plates.

[0011] Furthermore, each of the clamping plates has a sleeve hole on both the left and right sides, and the two corresponding sleeve holes are connected to the same bolt. The rear ends of the two bolts are threaded with nuts. The opposite surfaces of the two clamping plates are fixedly provided with rubber pads that abut against the sides of the translation beam.

[0012] Furthermore, the air curtain isolation mechanism includes a filter box, the top surface of which is fixedly connected to the bottom surface of the enclosure frame. The inner wall of the filter box is fixedly provided with multiple horizontally arranged connecting frames. Each connecting frame has an insertion slot on its inner side for insertion into the fixed frame. The cross-section of the connecting frame and the insertion slot is gate-shaped.

[0013] Furthermore, each of the fixed frames is fixedly equipped with a filter screen inside, and the bottom surfaces of the multiple fixed frames are fixedly connected to the top surface of the mounting plate. A sealing ring is provided around the top edge of the mounting plate, and the top surface of the sealing ring simultaneously abuts against the bottom surface of the connecting frame and the filter box. The inner side of the connecting frame is fixedly connected to the outer side of the filter box. The mounting plate and the connecting frame are provided with sleeve holes at the four corners, and two corresponding sleeve holes are fitted with the same bolt. The top of each of the four bolts is threaded with a nut.

[0014] Furthermore, an air inlet slot is provided on the left side of the filter box, and the right side of the filter box is fixedly connected to the air inlet pipe of the air pump. The air pump is fixedly installed on the outside of the closed frame through a mounting base. One end of the air outlet pipe of the air pump is fixedly connected to a connecting pipe, and the other end of the connecting pipe is fixedly connected to an air knife. The air knife is fixedly installed on the side of the fixed plate, and the top surface of the fixed plate is fixedly connected to the bottom surface of the closed frame. The air knife and the filter box are located on the left and right sides of the dynamic sealing mechanism, respectively, and the air outlet of the air knife corresponds to the air inlet slot on the left and right.

[0015] Furthermore, multiple fixing seats are fixedly installed on the top of the left and right sides of the enclosed frame, and each fixing seat has a through hole for screws to pass through. The enclosed frame is installed and fixed to the top of the inner side of the painting reciprocating machine gantry by the multiple fixing seats and screws, and the blocking plate corresponds to the door opening opened on the front side of the painting reciprocating machine gantry.

[0016] The technical effects achieved by this invention are as follows: This invention encloses the sides and bottom of the translation beam by setting up a sealing frame, and a dynamic sealing mechanism is set at the bottom of the sealing frame. Through the cooperation of two coil spring take-up rollers and the flexible curtain, as well as the fixed connection between the clamp and the painting moving arm, the flexible curtain can achieve the follow-up sealing of the moving trough. No matter what position the painting moving arm is in, the rest of the moving trough is always tightly covered by the flexible curtain. This achieves effective sealing of the translation beam and the reciprocating mechanism set on the translation beam, preventing paint mist escaping during the painting process from adhering to the reciprocating mechanism, effectively extending the service life of the reciprocating mechanism and reducing its maintenance frequency.

[0017] This invention adds an air curtain isolation mechanism consisting of an air knife and a filter box below the dynamic sealing mechanism, forming a high-speed air curtain that can actively blow upward-drifting paint mist into the filter box. This not only serves as an isolation and blocking function but also achieves active collection of paint mist, preventing paint mist from condensing and solidifying on the surface of the flexible curtain and extending the service life of the flexible curtain.

[0018] This invention features an external structure that can be directly installed on the gantry of an existing paint spraying reciprocating machine, enabling protective modifications to the existing machine without replacing existing equipment and effectively reducing production costs. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a top view of the enclosed frame structure in this invention; Figure 3 This is a bottom view of the enclosed frame structure in this invention; Figure 4 This is a schematic diagram of the dynamic closure mechanism in this invention; Figure 5 This is a cross-sectional view of the fixed box in this invention; Figure 6 This is a schematic diagram of the air curtain isolation mechanism in this invention; Figure 7 This is a cross-sectional view of the filter box in this invention.

[0020] The attached diagram lists the components represented by each number as follows: 1. Enclosed frame; 2. Blocking plate; 3. Painting reciprocating machine gantry; 4. Dynamic enclosure mechanism; 41. Fixed box; 42. Guide rail; 43. Connecting plate; 44. Sliding plate; 45. Flexible curtain; 46. Clamping plate; 47. Bolt 1; 48. Nut 1; 49. Groove; 410. Spring take-up roller; 5. Air curtain isolation mechanism; 51. Filter box; 52. Air pump; 53. Connecting pipe; 54. Mounting plate; 55. Connecting frame; 56. Air inlet slot; 57. Air knife; 58. Fixed plate; 59. Nut 2; 510. Bolt 2; 511. Connecting frame; 512. Fixed frame; 513. Filter screen; 6. Translation beam; 7. Moving slot; 8. Painting moving arm; 9. Fixed seat; 10. Connecting groove. Detailed Implementation

[0021] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0022] like Figure 1-7 As shown, a dustproof device for a reciprocating painting machine for automotive exterior parts includes a closed frame 1. A blocking plate 2 is fixedly installed on the front end of the inner side of the closed frame 1. The upper ends of the closed frame 1 and the blocking plate 2 are both in contact with the upper inner wall of the painting reciprocating machine gantry 3. The rear end of the closed frame 1 is in contact with the rear inner wall of the painting reciprocating machine gantry 3. A connecting groove 10 is provided on the upper end of the blocking plate 2. The connecting groove 10 is sleeved on the outside of the translation beam 6 of the painting reciprocating machine. The cross-sectional shape of the connecting groove 10 matches the outer periphery of the translation beam 6. It is used to sleeve on the outside of the translation beam 6 of the painting reciprocating machine, which serves both as a positioning function and as a preliminary seal at the front end of the beam. A moving groove 7 is provided on the bottom surface of the closed frame 1. The moving groove 7 provides passage space for the reciprocating sliding of the painting moving arm 8. The paint spraying moving arm 8, which is set on the translation beam 6, is fitted inside the moving groove 7. The paint spraying moving arm 8 is connected to the dynamic sealing mechanism 4. The dynamic sealing mechanism 4 is used to seal the moving groove 7. The dynamic sealing mechanism 4 is set at the bottom of the sealing frame 1. An air curtain isolation mechanism 5 is also set at the bottom of the sealing frame 1. The air curtain isolation mechanism 5 is located outside the dynamic sealing mechanism 4.

[0023] The dynamic enclosure mechanism 4 includes two fixed boxes 41. The top surfaces of the two fixed boxes 41 are fixedly connected to the bottom surface of the enclosure frame 1. Each fixed box 41 is equipped with a coil spring take-up roller 410. The end of the coil spring take-up roller 410 is rotatably connected to the side plate of the fixed box 41 through a bearing. The coil spring take-up roller 410 has a built-in spiral spring and has the elasticity for automatic rewinding and reset. The flexible curtain 45 can be automatically rolled up without the need for an additional motor drive.

[0024] Flexible curtains 45 are wound on both spring take-up rollers 410. The flexible curtains 45 at both ends extend through two slots 49 to the outside of the two fixed boxes 41. The two slots 49 are respectively opened on the opposite sides of the two fixed boxes 41.

[0025] The opposite ends of the two flexible curtains 45 are fixedly connected to the opposite sides of the two sliding plates 44. The left and right ends of the two sliding plates 44 are slidably connected to the two guide rails 42. The top surfaces of the two guide rails 42 are fixedly connected to the bottom surface of the enclosure frame 1. The two guide rails 42 are located on the left and right sides of the moving groove 7, and the two fixed boxes 41 are located on the front and rear sides of the moving groove 7. The guide rails 42 are used to guide and limit the sliding plates 44 horizontally, ensuring that the sliding plates 44 can only slide horizontally along the length of the moving groove 7, and there will be no problems of front-to-back offset or up-and-down edge warping.

[0026] The bottom surfaces of the two sliding plates 44 are fixedly connected to the top surfaces of the two connecting plates 43, and the bottom surfaces of the two connecting plates 43 are fixedly connected to the top surfaces of the two clamping plates 46.

[0027] Each clamping plate 46 has a sleeve hole on both the left and right sides, and the two corresponding sleeve holes are fitted with the same bolt 47. The rear ends of the two bolts 47 are threaded with nuts 48. The opposite surfaces of the two clamping plates 46 are fixed with rubber pads that abut against the sides of the translation beam 6. The clamping plates 46 are detachably locked and fixed by bolts 47 and nuts 48, which facilitates quick disassembly and assembly of the paint spraying moving arm 8 according to different specifications on site. After the clamping plates 46 and the paint spraying moving arm 8 are connected and fixed, when the paint spraying moving arm 8 moves along the moving groove 7, it will simultaneously drag the two clamping plates 46 and the sliding plate 44 connected to them, thereby driving the two flexible curtains 45 to move and relax accordingly: the coil spring winding roller 410 on one side releases the flexible curtain 45, and the coil spring winding roller 410 on the other side simultaneously winds up the flexible curtain 45, so that the flexible curtain 45 always covers all areas of the moving groove 7 except for the position where the paint spraying moving arm 8 passes through, realizing dynamic following closure.

[0028] The air curtain isolation mechanism 5 includes a filter box 51. The top surface of the filter box 51 is fixedly connected to the bottom surface of the enclosure frame 1. Multiple horizontally arranged connecting frames 511 are fixedly installed on the inner wall of the filter box 51. Each connecting frame 511 has an insertion slot on its inner side to insert into the fixed frame 512. The cross-section of the connecting frame 511 and the insertion slot is gate-shaped. The gate-shaped structure can achieve precise upper and lower alignment and insertion, while ensuring that the four sides are sealed after insertion to prevent airflow from bypassing and leaking through the insertion gap.

[0029] Each fixed frame 512 has a filter screen 513 fixedly installed inside. The filter screen 513 is made of glass fiber cotton. The bottom surfaces of multiple fixed frames 512 are fixedly connected to the top surface of the mounting plate 54. A sealing ring is provided around the top edge of the mounting plate 54, and the top surface of the sealing ring abuts against the bottom surface of the connecting frame 55 and the filter box 51. The inner side of the connecting frame 55 is fixedly connected to the outer side of the filter box 51. The mounting plate 54 and the connecting frame 55 have sleeve holes at the four corners, and the two corresponding upper and lower sleeve holes are fitted with the same bolt 510. The top of each of the four bolts 510 is threaded with a nut 59, thereby detachably fixing the mounting plate 54 and the multiple fixed frames 512 on it to the bottom of the filter box 51.

[0030] An air inlet slot is provided on the left side of the filter box 51. The right side of the filter box 51 is fixedly connected to the air inlet pipe of the air pump 52. The air pump 52 is fixedly installed on the outside of the enclosure frame 1 through the mounting base. The air outlet pipe of the air pump 52 is fixedly connected to one end of the connecting pipe 53. The other end of the connecting pipe 53 is fixedly connected to the air knife 57. The air knife 57 is fixedly installed on the side of the fixing plate 58. The top surface of the fixing plate 58 is fixedly connected to the bottom surface of the enclosure frame 1. The air knife 57 and the filter box 51 are located on the left and right sides of the dynamic sealing mechanism 4, respectively. The air outlet of the air knife 57 corresponds to the air inlet slot, so that the airflow ejected by the air knife 57 can pass horizontally through the lower area of ​​the dynamic sealing mechanism 4, forming a high-speed air curtain, and finally enter the air inlet slot on the opposite side. It can actively blow the upward drifting paint mist into the filter box 51, which not only plays a role in isolation and blocking, but also realizes the active collection of paint mist, preventing paint mist from condensing and solidifying on the surface of the flexible curtain 45, and extending the service life of the flexible curtain 45.

[0031] Multiple fixing seats 9 are fixedly installed on the top of the left and right sides of the enclosed frame 1. Each fixing seat 9 has a through hole for screws to pass through. The enclosed frame 1 is installed and fixed to the top of the inner side of the painting reciprocating machine gantry 3 by the multiple fixing seats 9 and screws. The blocking plate 2 corresponds to the door opening opened on the front side of the painting reciprocating machine gantry 3.

[0032] The working principle of this invention is as follows: When using this device to enclose and protect the top translation beam 6 and translation mechanism of the paint spraying reciprocating machine, the user can place the top of the enclosure 1 against the top of the inside of the paint spraying reciprocating machine gantry 3, and align the blocking plate 2 with the door opening on the front side of the paint spraying reciprocating machine gantry 3, so that the front end of the translation beam 6 is fitted into the connecting groove 10, the paint spraying moving arm 8 passes through the moving groove 7, and then the screw passes through the through hole opened in the fixing seat 9 and is connected and fixed to the top of the paint spraying reciprocating machine gantry 3. The user can then pull both clamps 46 toward the paint spraying arm 8. When the two clamps 46 are close to each other, pull the two flexible curtains 45 to be released from the two coil spring take-up rollers 410 respectively. When the two clamps 46 are in contact with the side of the paint spraying arm 8, pass the bolt 47 through the two corresponding sleeve holes and thread the nut 48 to the rear end of the bolt 47, thereby fixing the clamps 46 to the paint spraying arm 8. During the painting operation, the air pump 52 is activated. During the painting process, the painting moving arm 8 slides within the moving groove 7 to adjust the nozzle position. The painting moving arm 8 also drives the two side clamps 46 to move synchronously. The two side spring take-up rollers 410 work together to drive the two flexible curtains 45 to roll up and down synchronously, thus sealing the moving groove 7. During the operation of the air pump 52, air from the left side of the filter box 51 is drawn into the filter box 51 through the air inlet groove 56, and gas is input into the air knife 57 through the connecting pipe 53. The air knife 57 forms an air curtain to the right. At this time, the air knife... In conjunction with the air inlet slot, 57 forms a parallel air curtain below the flexible curtain 45 to isolate and block the upward-drifting paint mist, and draws the paint mist into the filter box 51 for filtration using multi-layer filter screens 513. After the painting operation is completed, the air pump 52 is turned off. When it is necessary to clean or replace the filter screen 513, the user can separate the second nut 59 from the second bolt 510, and pull down the mounting plate 54 to pull out the multiple fixing frames 512 from the filter box 51. Then, the mounting plate 54, fixing frames 512, and filter screen 513 can be replaced as a whole.

[0033] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A dustproof device for a reciprocating machine for painting automotive exterior parts, comprising a closed frame (1), characterized in that: A blocking plate (2) is fixedly installed on the front end of the inner side of the closed frame (1). The upper ends of the closed frame (1) and the blocking plate (2) are both in contact with the upper inner wall of the painting reciprocating machine gantry (3). The rear end of the closed frame (1) is in contact with the rear inner wall of the painting reciprocating machine gantry (3). A connecting groove (10) is opened at the upper end of the blocking plate (2). The connecting groove (10) is sleeved on the outside of the translation beam (6) of the painting reciprocating machine. A moving groove (7) is opened on the bottom surface of the closed frame (1). The paint spraying moving arm (8) provided on the translation beam (6) is sleeved in the moving groove (7). The paint spraying moving arm (8) is connected to the dynamic sealing mechanism (4). The dynamic sealing mechanism (4) is used to seal the moving groove (7). The dynamic sealing mechanism (4) is set at the bottom of the sealing frame (1). The bottom of the sealing frame (1) is also provided with an air curtain isolation mechanism (5). The air curtain isolation mechanism (5) is located outside the dynamic sealing mechanism (4).

2. A dustproof device for a reciprocating machine for painting automotive exterior parts according to claim 1, characterized in that: The dynamic closing mechanism (4) includes two fixed boxes (41), the top surfaces of the two fixed boxes (41) are fixedly connected to the bottom surface of the closing frame (1), and each fixed box (41) is provided with a coil spring take-up roller (410), the end of the coil spring take-up roller (410) is rotatably connected to the side plate of the fixed box (41) through a bearing.

3. A dustproof device for a reciprocating machine for painting automotive exterior parts according to claim 2, characterized in that: Both of the spring take-up rollers (410) have flexible curtains (45) wound up. The flexible curtains (45) at both ends extend through two slots (49) to the outside of the two fixed boxes (41). The two slots (49) are respectively opened on the opposite sides of the two fixed boxes (41).

4. A dustproof device for a reciprocating machine for painting automotive exterior parts according to claim 3, characterized in that: The opposite ends of the two flexible curtains (45) are fixedly connected to the opposite sides of the two sliding plates (44). The left and right ends of the two sliding plates (44) are slidably connected to the two guide rails (42). The top surfaces of the two guide rails (42) are fixedly connected to the bottom surface of the enclosure frame (1). The two guide rails (42) are located on the left and right sides of the moving groove (7). The two fixed boxes (41) are located on the front and rear sides of the moving groove (7).

5. A dustproof device for a reciprocating machine for painting automotive exterior parts according to claim 4, characterized in that: The bottom surfaces of the two sliding plates (44) are respectively fixedly connected to the top surfaces of the two connecting plates (43), and the bottom surfaces of the two connecting plates (43) are respectively fixedly connected to the top surfaces of the two clamping plates (46).

6. A dustproof device for a reciprocating machine for painting automotive exterior parts according to claim 5, characterized in that: Each clamping plate (46) has a sleeve hole on both the left and right sides, and the two corresponding sleeve holes are connected to the same bolt (47). The rear ends of the two bolts (47) are threaded with nuts (48). The opposite surfaces of the two clamping plates (46) are fixedly provided with rubber pads that abut against the side of the translation beam (6).

7. A dustproof device for a reciprocating machine for painting automotive exterior parts according to claim 1, characterized in that: The air curtain isolation mechanism (5) includes a filter box (51). The top surface of the filter box (51) is fixedly connected to the bottom surface of the closed frame (1). The inner wall of the filter box (51) is fixedly provided with multiple horizontally arranged connecting frames (511). Each connecting frame (511) has an insertion slot on its inner side that is inserted into the fixed frame (512). The cross-section of the connecting frame (511) and the insertion slot are both gate-shaped.

8. A dustproof device for a reciprocating machine for painting automotive exterior parts according to claim 7, characterized in that: Each of the fixed frames (512) is fixedly provided with a filter screen (513). The bottom surfaces of the multiple fixed frames (512) are fixedly connected to the top surface of the mounting plate (54). A sealing ring is provided around the top edge of the mounting plate (54), and the top surface of the sealing ring simultaneously abuts against the bottom surface of the connecting frame (55) and the filter box (51). The inner side of the connecting frame (55) is fixedly connected to the outer side of the filter box (51). The four corners of the mounting plate (54) and the connecting frame (55) are provided with sleeve holes 2, and the two sleeve holes 2 corresponding to the top and bottom are connected to the same bolt 2 (510). The top of the four bolts 2 (510) are threaded with nuts 2 (59).

9. A dustproof device for a reciprocating machine for painting automotive exterior parts according to claim 8, characterized in that: The filter box (51) has an air inlet slot on its left side. The filter box (51) is fixedly connected to the air inlet pipe of the air pump (52) on its right side. The air pump (52) is fixedly installed on the outside of the closed frame (1) by a mounting base. The air outlet pipe of the air pump (52) is fixedly connected to one end of the connecting pipe (53). The other end of the connecting pipe (53) is fixedly connected to the air knife (57). The air knife (57) is fixedly installed on the side of the fixing plate (58). The top surface of the fixing plate (58) is fixedly connected to the bottom surface of the closed frame (1). The air knife (57) and the filter box (51) are located on the left and right sides of the dynamic sealing mechanism (4), respectively, and the air outlet of the air knife (57) corresponds to the air inlet slot on the left and right.

10. A dustproof device for a reciprocating machine for painting automotive exterior parts according to claim 1, characterized in that: Multiple fixing seats (9) are fixedly installed on the top of the left and right sides of the enclosed frame (1). Each fixing seat (9) has a through hole for screws to pass through. The enclosed frame (1) is fixed to the top of the inner side of the painting reciprocating machine gantry (3) by the multiple fixing seats (9) and screws. The blocking plate (2) corresponds to the door opening opened on the front side of the painting reciprocating machine gantry (3).

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