Circuit board wide-width coating machine with fan-shaped atomizing nozzle structure

Abstract

The invention relates to the technical field of circuit board coating machines, in particular to a wide circuit board coating machine with a fan-shaped atomizing nozzle structure, which comprises a rack, a spraying chamber and a support frame, the spraying chamber and the support frame are mounted at the top of the rack, the support frame is positioned in the spraying chamber, and an XY-axis moving platform positioned above the support frame is mounted in the spraying chamber; a spraying mechanism is installed on the XY-axis moving platform, and a negative pressure suction mechanism is installed on the rack. The fan-shaped spray head is adopted to spray a circuit board, a larger range can be sprayed at a time, the spraying efficiency of the circuit board is improved, when an electronic element needing to be avoided is encountered, a horizontal section of a stop lever locally shields sprayed paint, the paint is prevented from falling onto the corresponding electronic element, and the production efficiency of the circuit board is improved. And the spray gun does not need to specially avoid on the moving path, so that the spray gun can move according to the fastest moving path, and the spraying efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board coating machines, in particular to a wide-width circuit board coating machine with a fan-shaped atomizing nozzle structure. Background Art

[0002] Spraying conformal coating on circuit boards is a common method used to protect circuit boards and related devices from environmental corrosion, which can improve and extend their service life and ensure safety and reliability. Circuit board coating machines are generally used to spray the coating on circuit boards.

[0003] Because circuit boards are often equipped with electronic components such as connectors, relays, resistors, and microprocessors, it is necessary to avoid these electronic components when spraying paint onto them in order to ensure proper connection of the connectors and proper heat dissipation of the relays, resistors, microprocessors, and other electronic components during operation. Existing coating machines typically use spray guns with ball-shaped nozzles for spraying on such circuit boards with electronic components. The paint sprayed by ball-shaped nozzles has a narrow range, allowing it to easily bypass the edges when encountering electronic components, preventing the paint from being sprayed onto the electronic components. However, due to the narrow spray range of the ball-shaped nozzle, the spray gun must move back and forth more times during spraying, resulting in a longer time required to complete the spraying of a circuit board, affecting the efficiency of the circuit board. Furthermore, since the paint spraying machine needs to bypass the electronic components, the trajectory of the spray gun is not a linear motion, which increases the movement path of the paint sprayer, further affecting the efficiency of the circuit board. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a wide-width circuit board coating machine with a fan-shaped atomizing nozzle structure, including a frame and a spray chamber and a support frame installed on the top thereof. The support frame is located inside the spray chamber, and an XY-axis movable platform located above the support frame is installed inside the spray chamber. A spray mechanism is installed on the XY-axis movable platform, and a negative pressure suction mechanism is installed on the frame.

[0005] The spraying mechanism includes a spray gun installed on an XY-axis movable platform and provided with a fan-shaped nozzle; a plurality of L-shaped baffles equidistantly distributed on the left and right sides are rotatably installed on the front side of the spray gun; an elastic telescopic rod corresponding to the baffle rod is fixedly installed on the top of the spray gun; a linkage assembly is installed between the elastic telescopic rod and the corresponding baffle rod, which drives the baffle rod to rotate back and forth as the elastic telescopic rod moves in an extension manner; the spray chamber is provided with a guide assembly located above the spray gun for guiding the extension and extension movement of the elastic telescopic rod.

[0006] When the spray gun moves above the electronic components on the surface of the circuit board, the guide assembly guides the elastic telescopic rod to retract downward, and the elastic telescopic rod drives the barrier rod to rotate backward through the transmission of the linkage assembly, so that the horizontal section of the barrier rod moves to the bottom of the spray gun and blocks the paint that is about to be sprayed onto the surface of the electronic components.

[0007] In one possible implementation, a mounting bracket for mounting a guide assembly is fixedly connected to the inner top wall of the spray chamber, and the guide assembly is detachably mounted on a substrate at the bottom of the mounting bracket. The shape of the substrate is the same as that of the circuit board, and guide blocks are fixedly mounted on the bottom of the substrate and the upper and lower portions corresponding to the electronic components on the surface of the circuit board. The front and rear sides of the guide block are provided with inclined surfaces for guiding the telescopic movement of the elastic telescopic rod.

[0008] In one possible implementation, the linkage assembly includes several support plates fixedly mounted on the front side of the spray gun and equidistantly distributed up and down, and movable rods corresponding to the elastic telescopic rods are installed between the several support plates for sliding up and down. The movable rod is in an inverted L-shape and the rear end of its horizontal section is fixedly connected to the telescopic section of the elastic telescopic rod. The front side of the vertical section of the baffle rod is fixedly connected to a swing arm, the bottom end of the movable rod is rotatably connected to a linkage rod, and the bottom end of the linkage rod is rotatably connected to the end of the swing arm away from the baffle rod.

[0009] In one possible implementation, a baffle located above the corresponding support plate is fixedly mounted on the movable rod, and a return spring mounted on the outside of the vertical section of the movable rod is fixedly connected between the bottom of the baffle and the corresponding support plate, and adjacent baffles and return springs are staggered up and down.

[0010] In one possible implementation, a paint collection assembly is also provided on the baffle rod, and the paint collection assembly includes a liquid guide groove opened at the top of the horizontal section of the baffle rod, a storage cavity is opened inside the horizontal section of the baffle rod, a connecting port is opened between the bottom end of the liquid guide groove and the top of the storage cavity, and a cleaning port is opened at the rear end of the horizontal section of the baffle rod, and a sealing plug is removably installed in the cleaning port.

[0011] In one possible implementation, a suction tube is fixedly mounted on the baffle rod, the bottom end of the suction tube passes through the baffle rod and extends into the interior of the storage cavity, and the top end of the suction tube is connected to a negative pressure suction mechanism for performing negative pressure absorption on the paint collected in the storage cavity.

[0012] In one possible implementation, the negative pressure suction mechanism includes a negative pressure pump and a liquid collecting bottle fixedly installed inside the frame. The input port of the negative pressure pump is fixedly connected and communicated with the top of the liquid collecting bottle through a pipe. The top of the liquid collecting bottle is fixedly connected with a suction tube. The end of the suction tube away from the liquid collecting bottle passes through the frame and the spray chamber and extends to the interior of the spray chamber. The top ends of several of the suction tubes are fixedly connected and communicated with the suction tube. A movable through groove for the suction tube to move back and forth is provided on the right side of the spray chamber.

[0013] In one possible implementation, the cross section of the horizontal section of the barrier rod is an isosceles trapezoidal structure that is wide at the top and narrow at the bottom. The left and right side walls of adjacent horizontal sections of the barrier rod do not contact each other, and the left and right side walls of adjacent vertical sections of the barrier rod are in sliding contact.

[0014] In one possible implementation, the spray gun is also equipped with a liquid receiving mechanism, which includes a liquid receiving box arranged below the baffle rod, the front side of the liquid receiving box is fixedly connected to connecting rods symmetrically distributed on the left and right, the top of the connecting rod is fixedly connected to the front side of the spray gun, and a number of scrapers equidistantly distributed on the left and right are fixedly installed on the liquid receiving box, and the top of the scraper is triangular and located between two adjacent baffle rods.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention adopts a fan-shaped nozzle to spray the circuit board, which can spray a larger range at one time, thereby improving the spraying efficiency of the circuit board. When encountering an electronic component that needs to be avoided, the guide component is used to guide the telescopic section of the elastic telescopic rod to move downward, and the elastic telescopic rod drives the baffle rod to rotate backward through the transmission of the linkage component, so that the horizontal section of the baffle rod partially blocks the sprayed paint to prevent the paint from falling on the corresponding electronic components. There is no need for the spray gun to deliberately avoid on the moving path, so that the spray gun can move according to the fastest moving path, thereby improving the spraying efficiency.

[0016] 2. The present invention collects the paint that falls on the barrier rod by arranging a paint collecting assembly on the barrier rod, so that when the barrier rod blocks the sprayed paint, the blocked paint can flow into the storage cavity along the liquid guide groove for temporary storage, thereby preventing the paint that falls on the barrier rod from dripping onto the circuit board as more and more paint falls on the barrier rod, causing uneven paint spraying or paint falling onto electronic components.

[0017] 3. The present invention sets the horizontal section of the baffle rod into a trapezoidal structure that is wide at the top and narrow at the bottom. On the one hand, it can reduce the possibility of paint adhering to the left and right sides of the horizontal section of the baffle rod. On the other hand, it can avoid the horizontal sections of adjacent baffle rods from contacting each other, preventing the left and right sides of the horizontal section of the baffle rod from adhering to the paint, which may cause adhesion between adjacent baffle rods, and is conducive to the normal forward and backward rotation of the baffle rod. In addition, the liquid receiving mechanism can promptly scrape and collect the paint adhering to the left and right sides of the horizontal section of the baffle rod to avoid dripping of paint. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a cross-sectional view of the front side of the present invention.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the spraying mechanism of the present invention.

[0021] Figure 4 It is a sectional view of the right side of the spraying mechanism of the present invention.

[0022] Figure 5 This invention Figure 4 Enlarged view of point A in the middle.

[0023] Figure 6 It is a schematic diagram of the planar structure after the horizontal section of the baffle rod of the present invention is rotated to the bottom of the spray gun.

[0024] Figure 7 It is a partial cross-sectional view of the baffle bar of the present invention.

[0025] Figure 8 It is a schematic diagram of the planar structure of the horizontal sections of the barrier rod of the present invention when they are arranged side by side.

[0026] Figure 9 It is a schematic diagram of the three-dimensional structure of the guide assembly of the present invention.

[0027] Figure 10 It is a schematic diagram of the three-dimensional structure of the liquid contact mechanism of the present invention.

[0028] Figure 11 It is a plan view of the shielding rod of the present invention shielding the spray.

[0029] In the figure: 1. frame; 2. spray chamber; 21. mounting frame; 22. movable slot; 3. support frame; 4. XY axis movable platform; 5. spray mechanism; 51. spray gun; 511. elastic telescopic rod; 52. baffle; 521. liquid guide groove; 522. storage chamber; 523. connecting port; 524. cleaning port; 525. sealing plug; 53. linkage assembly; 531. support plate; 532. movable rod; 533. swing arm; 534. linkage rod; 535. baffle; 536. reset spring; 54. guide assembly; 541. substrate; 542. guide block; 55. pipette; 6. negative pressure suction mechanism; 61. negative pressure pump; 62. liquid collecting bottle; 63. suction tube; 7. liquid receiving mechanism; 71. liquid receiving box; 72. connecting rod; 73. scraper. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described below, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] See also Figure 1 - Figure 11 A wide-width coating machine for circuit boards with a fan-shaped atomizing nozzle structure includes a frame 1 and a spray chamber 2 and a support frame 3 installed on the top thereof. The support frame 3 is located inside the spray chamber 2. An XY-axis movable platform 4 located above the support frame 3 is installed inside the spray chamber 2. A spray mechanism 5 is installed on the XY-axis movable platform 4, and a negative pressure suction mechanism 6 is installed on the frame 1.

[0032] The spraying mechanism 5 includes a spray gun 51 installed on the XY-axis movable platform 4 and having a fan-shaped nozzle. A number of L-shaped baffles 52 are rotatably installed on the front side of the spray gun 51 and are evenly spaced on the left and right. An elastic telescopic rod 511 corresponding to the baffle 52 is fixedly installed on the top of the spray gun 51. A linkage assembly 53 is installed between the elastic telescopic rod 511 and the corresponding baffle 52, which drives the baffle 52 to rotate back and forth as the elastic telescopic rod 511 moves in an extension and extension manner. The spraying chamber 2 is equipped with a guide assembly 54 located above the spray gun 51 for guiding the extension and extension movement of the elastic telescopic rod 511.

[0033] During specific use, the circuit board is placed on the support frame 3, and the spray gun 51 is driven to move by the XY-axis moving platform 4, so that the fan-shaped nozzles at the bottom of the spray gun 51 spray paint to the upper surface of the circuit board in rows. The fan-shaped nozzles do not spray paint when changing lines. When the spray gun 51 moves to above the electronic components on the surface of the circuit board, the guide assembly 54 guides the telescopic section of the elastic telescopic rod 511 to move downward, and the elastic telescopic rod 511 drives the baffle 52 to rotate backward through the transmission of the linkage assembly 53, so that the horizontal section of the baffle 52 moves to the bottom of the spray gun 51 and blocks the paint to be sprayed onto the surface of the electronic components to prevent the paint from falling onto the corresponding electronic components. There is no need for the spray gun 51 to deliberately avoid on the moving path, so that the spray gun 51 can move according to the fastest moving path, thereby improving the efficiency of spraying.

[0034] See also Figure 1 、 Figure 2 、 Figure 6 and Figure 9A mounting bracket 21 for mounting the guide assembly 54 is fixedly connected to the inner top wall of the spraying chamber 2. The guide assembly 54 can be detachably mounted on a substrate 541 at the bottom of the mounting bracket 21. The shape of the substrate 541 is the same as that of the circuit board. Guide blocks 542 are fixedly mounted on the bottom of the substrate 541 and the upper and lower corresponding positions of the electronic components on the surface of the circuit board. The front and rear sides of the guide block 542 are provided with inclined surfaces for guiding the telescopic movement of the elastic telescopic rod 511.

[0035] During specific use, when the fan-shaped nozzle of the spray gun 51 moves to the electronic component on the surface of the circuit board, the elastic telescopic rod 511 moves to the corresponding guide block 542 at the same time, and the top of the telescopic section of the elastic telescopic rod 511 slides along the inclined surface of the corresponding guide block 542, and the guide block 542 is used to push the telescopic section of the elastic telescopic rod 511 to move downward, and the elastic telescopic rod 511 then drives the baffle 52 to rotate backward through the transmission of the linkage assembly 53, so that the horizontal section of the baffle 52 moves to the bottom of the spray gun 51 and blocks the paint that is about to be sprayed onto the surface of the electronic component. When the spray gun 51 passes the electronic component, the elastic telescopic rod 511 leaves the corresponding guide block 542. After losing the obstruction of the guide block 542, the elastic telescopic rod 511 will extend upward, and the elastic telescopic rod 511 will drive the baffle 52 to rotate forward after being transmitted by the linkage assembly 53, so that the horizontal section of the baffle 52 no longer blocks the normal spraying of the paint.

[0036] During use, different substrates 541 can be replaced according to the different spray circuit boards, and the application range is wide. The guide block 542 guides the telescopic section of the elastic telescopic rod 511 to move up and down to realize automatic control of the forward and backward rotation of the blocking rod 52. No manual adjustment is required, and the operation is simple and convenient.

[0037] See also Figure 3 、 Figure 4 and Figure 5 The linkage assembly 53 includes several support plates 531 fixedly installed on the front side of the spray gun 51 and equidistantly distributed up and down. A movable rod 532 corresponding to the elastic telescopic rod 511 is installed between the several support plates 531 for sliding up and down. The movable rod 532 is in an inverted L shape and the rear end of its horizontal section is fixedly connected to the telescopic section of the elastic telescopic rod 511. The front side of the vertical section of the baffle rod 52 is fixedly connected to a swing arm 533. The bottom end of the movable rod 532 is rotatably connected to a linkage rod 534, and the bottom end of the linkage rod 534 is rotatably connected to the end of the swing arm 533 away from the baffle rod 52.

[0038] During specific use, in the initial state, the vertical section of the baffle rod 52 is in a forward tilted state. At this time, the horizontal section of the baffle rod 52 is located in front of the fan-shaped nozzle at the bottom of the spray gun 51, and will not block the sprayed paint. When the telescopic section of the elastic telescopic rod 511 moves downward, the telescopic section of the elastic telescopic rod 511 drives the movable rod 532 to move downward together. The movable rod 532 pushes the swing arm 533 to rotate counterclockwise through the linkage rod 534, and the swing arm 533 drives the baffle rod 52 to rotate counterclockwise, moving the horizontal section of the baffle rod 52 to the bottom of the fan-shaped nozzle, and using the baffle rod 52 to block the sprayed paint to prevent the electronic components from being sprayed with paint.

[0039] See also Figure 3 and Figure 4 A blocking piece 535 located above the corresponding support plate 531 is also fixedly installed on the movable rod 532. A return spring 536 is fixedly connected between the bottom of the blocking piece 535 and the corresponding support plate 531 and is sleeved on the outside of the vertical section of the movable rod 532. Adjacent blocking pieces 535 and return springs 536 are staggered up and down.

[0040] During specific use, when the telescopic section of the elastic telescopic rod 511 moves downward, the movable rod 532 will drive the corresponding blocking piece 535 to move downward together. At this time, the return spring 536 is compressed and contracted. When the telescopic section of the elastic telescopic rod 511 moves upward, the rebound force of the return spring 536 is used to push the movable rod 532 to move upward along with the telescopic section of the elastic telescopic rod 511, which is conducive to the upward movement and reset of the movable rod 532.

[0041] By staggering the return springs 536 up and down, it is possible to avoid that the distance between two adjacent return springs 536 is too close, and to avoid that the adjacent return springs 536 interfere with each other.

[0042] See also Figure 4 and Figure 7 A paint collecting assembly is also provided on the baffle rod 52, and the paint collecting assembly includes a liquid guide groove 521 opened at the top of the horizontal section of the baffle rod 52, a storage cavity 522 is opened inside the horizontal section of the baffle rod 52, a connecting port 523 is opened between the bottom end of the liquid guide groove 521 and the top of the storage cavity 522, and a cleaning port 524 is opened at the rear end of the horizontal section of the baffle rod 52, and a sealing plug 525 is detachably installed in the cleaning port 524.

[0043] In specific use, when the horizontal section of the blocking rod 52 moves to the bottom of the fan-shaped nozzle of the spray gun 51 to block the paint, the blocked paint will fall onto the horizontal section of the blocking rod 52 and flow along the liquid guide groove 521 into the storage chamber 522 for collection, thereby preventing the paint falling on the blocking rod 52 from dripping onto the circuit board as more and more paint falls on the blocking rod 52, causing uneven paint spraying or paint falling on electronic components. By opening the sealing plug 525, the paint collected in the storage cavity 522 can be poured out from the cleaning opening 524 at the rear end of the storage cavity 522, and at the same time, the paint residue inside the storage cavity 522 can be cleaned from the cleaning opening 524, avoiding the situation that too much paint residue inside the storage cavity 522 causes blockage.

[0044] Please refer to Figure 4 and Figure 7 , the stop rod 52 is fixedly installed with a liquid suction pipe 55, the bottom end of the liquid suction pipe 55 extends to the inside of the storage cavity 522 through the stop rod 52, and the top end of the liquid suction pipe 55 is connected with the negative pressure suction mechanism 6 for implementing negative pressure absorption of the paint collected in the storage cavity 522.

[0045] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 , the negative pressure suction mechanism 6 includes a negative pressure pump 61 fixedly installed inside the rack 1 and a liquid collecting bottle 62, the input port of the negative pressure pump 61 is fixedly connected and communicated with the top of the liquid collecting bottle 62 through a pipeline, the top of the liquid collecting bottle 62 is fixedly connected with a suction pipe 63, one end of the suction pipe 63 away from the liquid collecting bottle 62 extends to the inside of the spraying chamber 2 through the rack 1 and the spraying chamber 2, the top ends of the plurality of liquid suction pipes 55 are fixedly connected and communicated with the suction pipe 63, and the right side of the spraying chamber 2 is provided with a moving groove 22 for the front and back movement of the suction pipe 63.

[0046] In specific use, the negative pressure pump 61 generates negative pressure to make the liquid suction pipe 55 suck the paint collected in the inside of the storage cavity 522, the sucked paint is transported through the liquid suction pipe 55 and the suction pipe 63 and then is sucked into the liquid collecting bottle 62 for storage, the paint in the storage cavity 522 is sucked away in time to avoid the storage cavity 522 being filled with paint, which can enable the stop rod 52 to work for a long time, and when the XY-axis moving platform 4 drives the spray gun 51 to move forward and backward, the suction pipe 63 can move forward and backward in the moving groove 22 to avoid the suction pipe 63 being tight.

[0047] Please refer to Figure 8 , the horizontal section of the horizontal section of the stop rod 52 is in the shape of an isosceles trapezoid with the upper part being wide and the lower part being narrow, the left and right side walls of adjacent horizontal sections of the stop rod 52 do not contact, and the left and right side walls of adjacent vertical sections of the stop rod 52 slide with each other.

[0048] In specific use, the horizontal section of the stop rod 52 is set to be in the shape of a trapezoid with the upper part being wide and the lower part being narrow, which can reduce the possibility of paint adhering to the left and right side walls of the horizontal section of the stop rod 52, and can avoid the horizontal sections of adjacent stop rods 52 contacting each other, preventing the left and right side walls of the horizontal section of the stop rod 52 from adhering to paint, which causes the adjacent stop rods 52 to stick to each other, which is beneficial to the normal forward and backward rotation of the stop rod 52.

[0049] By making the vertical sections of adjacent baffles 52 contact each other, the distance between adjacent baffles 52 can be made closer. When encountering wider electronic components, multiple baffles 52 can simultaneously block the sprayed paint. During the blocking process, the paint will not drip from between adjacent baffles 52, ensuring the safety of the electronic components.

[0050] See also Figure 3 and Figure 10 The spray gun 51 is also equipped with a liquid receiving mechanism 7, which includes a liquid receiving box 71 arranged below the baffle rod 52. The front side of the liquid receiving box 71 is fixedly connected to connecting rods 72 symmetrically distributed on the left and right. The top of the connecting rod 72 is fixedly connected to the front side of the spray gun 51. A number of scrapers 73 equidistantly distributed on the left and right are fixedly installed on the liquid receiving box 71. The top of the scraper 73 is triangular and is located between two adjacent baffle rods 52.

[0051] During specific use, after the nozzle of the spray gun 51 passes over the electronic component, the vertical section of the baffle rod 52 no longer blocks the paint. At this time, the baffle rod 52 rotates forward clockwise. If there is paint attached to the left and right sides of the horizontal section of the baffle rod 52, the scraper 73 can scrape off the attached paint during the rotation of the baffle rod 52. The scraped paint flows along the scraper 73 into the liquid receiving box 71 for temporary storage, preventing the paint from dripping as more and more paint adheres to the left and right sides of the horizontal section of the baffle rod 52.

[0052] See also Figure 1 、 Figure 6 and Figure 9 The front and rear widths of the guide block 542 are equal to the front and rear distance of the vertical projection of the corresponding electronic component. The left and right lengths of the guide block 542 are proportionally reduced according to the left and right distance of the vertical projection of the corresponding electronic component. The left and right lengths of the guide block 542 are 0.2-0.3 times the left and right distance of the vertical projection of the corresponding electronic component. The minimum value of the left and right lengths of the guide block 542 is equal to the left and right lengths of the blocking rod 52.

[0053] During specific use, the left and right lengths of the guide block 542 are set in a certain proportion to the left and right distance of the vertical projection of the corresponding electronic component. The guide blocks 542 corresponding to electronic components of different lengths also have different lengths. When the spray gun 51 passes through an electronic component with a longer length, the corresponding guide block 542 can push multiple elastic telescopic rods 511 to move downward at the same time, so that multiple side-by-side blocking rods 52 can block the paint at the same time to prevent the electronic components from being sprayed with paint; by setting guide blocks 542 of different lengths, when encountering electronic components of different sizes, different numbers of blocking rods 52 can be moved to block the paint, forming blocking surfaces of different sizes, thereby improving the applicability of the device.

[0054] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected, or slidingly connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or 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.

[0055] The embodiments of the specific implementation are the preferred embodiments of the present application, not limited by the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A circuit board wide-width coating machine with a fan-shaped atomizing nozzle structure, comprising a frame (1), a spray chamber (2) and a support frame (3) mounted on the top of the frame, the support frame (3) being located inside the spray chamber (2), and an XY axis moving platform (4) located above the support frame (3) being installed inside the spray chamber (2), characterized in that: A spraying mechanism (5) is installed on the XY-axis moving platform (4), and a negative pressure suction mechanism (6) is installed on the frame (1); The spraying mechanism (5) comprises a spray gun (51) mounted on an XY axis movable platform (4) and having a fan-shaped spray head, a plurality of L-shaped baffles (52) equidistantly distributed on the left and right sides being rotatably mounted on the front side of the spray gun (51), an elastic telescopic rod (511) corresponding to the baffle rod (52) being fixedly mounted on the top of the spray gun (51), a linkage assembly (53) being mounted between the elastic telescopic rod (511) and the corresponding baffle rod (52) for driving the baffle rod (52) to rotate forward and backward as the elastic telescopic rod (511) moves in a telescopic manner, and a guide assembly (54) is mounted on the spray chamber (2) for guiding the telescopic movement of the elastic telescopic rod (511); When the spray gun (51) moves to above the electronic components on the surface of the circuit board, the guide assembly (54) guides the elastic telescopic rod (511) to retract downward, and the elastic telescopic rod (511) drives the blocking rod (52) to rotate backward through the transmission of the linkage assembly (53), so that the horizontal section of the blocking rod (52) moves to the bottom of the spray gun (51) and blocks the paint that is about to be sprayed onto the surface of the electronic components.

2. A circuit board wide-width coating machine with a fan-shaped atomizing nozzle structure according to claim 1, characterized in that: A mounting frame (21) for mounting a guide assembly (54) is fixedly connected to the inner top wall of the spray chamber (2). The guide assembly (54) is detachably mounted on a base plate (541) at the bottom of the mounting frame (21). The base plate (541) has the same shape as that of a circuit board. Guide blocks (542) are fixedly mounted on the bottom of the base plate (541) and at positions corresponding to upper and lower portions of electronic components on the surface of the circuit board. Both front and rear sides of the guide block (542) are provided with inclined surfaces for guiding the telescopic movement of the elastic telescopic rod (511).

3. The circuit board wide-width coating machine with a fan-shaped atomizing nozzle structure according to claim 1, characterized in that: The linkage assembly (53) includes a plurality of support plates (531) fixedly mounted on the front side of the spray gun (51) and equidistantly distributed up and down. A movable rod (532) corresponding to the elastic telescopic rod (511) is mounted between the plurality of support plates (531) for sliding up and down. The movable rod (532) is in an inverted L-shape and the rear end of its horizontal section is fixedly connected to the telescopic section of the elastic telescopic rod (511). The front side of the vertical section of the blocking rod (52) is fixedly connected to a swing arm (533). The bottom end of the movable rod (532) is rotatably connected to a linkage rod (534). The bottom end of the linkage rod (534) is rotatably connected to an end of the swing arm (533) away from the blocking rod (52).

4. A circuit board wide-width coating machine with a fan-shaped atomizing nozzle structure according to claim 3, characterized in that: A baffle (535) located above the corresponding support plate (531) is also fixedly mounted on the movable rod (532). A return spring (536) sleeved on the outside of the vertical section of the movable rod (532) is fixedly connected between the bottom of the baffle (535) and the corresponding support plate (531). Adjacent baffles (535) and return springs (536) are staggered up and down.

5. The circuit board wide-width coating machine with a fan-shaped atomizing nozzle structure according to claim 1, characterized in that: The baffle rod (52) is also provided with a paint collecting assembly, which includes a liquid guide groove (521) opened at the top of the horizontal section of the baffle rod (52), a storage cavity (522) opened inside the horizontal section of the baffle rod (52), a communication port (523) opened between the bottom end of the liquid guide groove (521) and the top of the storage cavity (522), and a cleaning port (524) opened at the rear end of the horizontal section of the baffle rod (52), a sealing plug (525) detachably installed in the cleaning port (524).

6. A circuit board wide-width coating machine with a fan-shaped atomizing nozzle structure according to claim 5, characterized in that: A liquid suction tube (55) is fixedly mounted on the baffle rod (52). The bottom end of the liquid suction tube (55) passes through the baffle rod (52) and extends into the interior of the storage cavity (522). The top end of the liquid suction tube (55) is connected to the negative pressure suction mechanism (6) for performing negative pressure absorption on the paint collected in the storage cavity (522).

7. A circuit board wide-width coating machine with a fan-shaped atomizing nozzle structure according to claim 6, characterized in that: The negative pressure suction mechanism (6) includes a negative pressure pump (61) and a liquid collecting bottle (62) fixedly installed inside the frame (1). The input port of the negative pressure pump (61) is fixedly connected and communicated with the top of the liquid collecting bottle (62) through a pipeline. The top of the liquid collecting bottle (62) is fixedly connected with a suction pipe (63). The end of the suction pipe (63) away from the liquid collecting bottle (62) passes through the frame (1) and the spray chamber (2) and extends to the inside of the spray chamber (2). The top ends of several of the suction pipes (55) are fixedly connected and communicated with the suction pipe (63). A movable through groove (22) for the suction pipe (63) to move forward and backward is opened on the right side of the spray chamber (2).

8. The circuit board wide-width coating machine with a fan-shaped atomizing nozzle structure according to claim 1, characterized in that: The cross section of the horizontal section of the baffle rod (52) is an isosceles trapezoidal structure that is wide at the top and narrow at the bottom. The left and right side walls of adjacent horizontal sections of the baffle rod (52) do not contact each other, while the left and right side walls of adjacent vertical sections of the baffle rod (52) are in sliding contact.

9. The circuit board wide-width coating machine with a fan-shaped atomizing nozzle structure according to claim 8, characterized in that: The spray gun (51) is also equipped with a liquid receiving mechanism (7), which includes a liquid receiving box (71) arranged below the baffle rod (52), the front side of the liquid receiving box (71) is fixedly connected to connecting rods (72) symmetrically distributed on the left and right, the top of the connecting rod (72) is fixedly connected to the front side of the spray gun (51), and a plurality of scrapers (73) equidistantly distributed on the left and right are fixedly installed on the liquid receiving box (71), the top of the scraper (73) is triangular and is located between two adjacent baffle rods (52).

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