Circuit board paint spraying device and process

Abstract

The invention relates to the technical field of circuit board production, and discloses a circuit board paint spraying device and a circuit board paint spraying process, the circuit board paint spraying device comprises a paint spraying cabinet body, the paint spraying cabinet body is provided with a workbench and a paint spraying cavity communicated with the external environment, and the paint spraying cavity is opposite to the workbench; the main supporting frame is installed on the workbench, located in the paint spraying cavity and provided with an upper supporting part extending in the linear direction; the first supporting mechanism comprises a first supporting strip, a first clamping group and a first locking piece; the first clamping sets move on the first supporting strip in the direction parallel to the extending direction of the upper supporting part, and each first clamping set is used for clamping a single circuit board. The first locking piece is used for locking the first clamping set. The first supporting strip is provided with a lower supporting part which is parallel to the upper supporting part and is used for supporting the bottom side of the circuit board; wherein during paint spraying, the lower supporting part is lower than the upper supporting part. The paint spraying surface of the circuit board can be conveniently exposed.

Description

Technical Field

[0001] This application relates to the technical field of circuit board manufacturing, and in particular to a circuit board painting apparatus and process. Background Technology

[0002] In the electronics manufacturing industry, to protect circuit boards (PCBs) from environmental factors such as moisture, dust, corrosive gases, and mold, a layer of conformal coating is typically applied to the surface of the PCB. This coating process is usually carried out in a spray booth, such as a water curtain spray booth.

[0003] However, existing water curtain spray booths are not equipped with support mechanisms suitable for circuit boards. When spraying, operators usually need to hold the circuit boards directly by hand or simply place them on the simple support frame of the spray booth. This makes the circuit boards less stable during the spraying process, and the surface to be painted cannot be well displayed. Summary of the Invention

[0004] To facilitate the exposure of the painted surface of the circuit board, this application provides a circuit board painting apparatus and process.

[0005] In a first aspect, this application provides a circuit board painting device, which adopts the following technical solution: A circuit board painting device, comprising: The paint spraying cabinet has a workbench and a paint spraying chamber that communicates with the external environment, the paint spraying chamber being opposite to the workbench; A main support frame, mounted on the workbench and located within the spray painting chamber, has an upper support portion extending in a straight direction. This upper support portion supports circuit boards and allows the circuit boards to be arranged sequentially along the length of the upper support portion. The first support mechanism includes a first support bar, a first clamping group, and a first locking member; the first clamping group is movable on the first support bar along a direction parallel to the upper support portion and is provided in multiple groups, each group of the first clamping group is used to clamp a single circuit board; the first locking member is used to lock the first clamping group; and the first support bar has a lower support portion parallel to the upper support portion for supporting the bottom side of the circuit board; During painting, the height of the lower support is lower than the height of the upper support.

[0006] By adopting the above technical solution, a main support frame and a first support mechanism are set up to cooperate with the paint spraying chamber. The upper and lower support parts form two-point support for the circuit board, keeping the circuit board in an inclined position during the paint spraying process to facilitate the exposure of the paint surface of the circuit board. At the same time, the first clamping group can slide and lock along the support bar, which can adapt to the clamping requirements of circuit boards of different sizes and prevent the circuit board from shifting during the paint spraying process, thereby improving the stability of the circuit board during the paint spraying process.

[0007] Optionally, the first clamping group includes two first clamping members that are distributed and slide along the length of the first support bar.

[0008] By adopting the above technical solution, the first clamping group can adapt to circuit boards of different widths or shapes by sliding and adjusting the distance between the two first clamping members.

[0009] Optionally, the first locking member includes a first air tube connected to the first support bar, the first air tube passing through all the clamping members; when the first air tube is inflated, it abuts against the first clamping member to restrict the movement of the first clamping member relative to the first support bar.

[0010] By adopting the above technical solution, the first locking component uses an inflatable first air tube that passes through all the first clamping components, and multiple clamping components are simultaneously locked by inflation. The operation is simple and quick, and the friction of the inflatable locking method is controllable and the unlocking is rapid. It is especially suitable for clamping scenarios where multiple circuit boards are arranged continuously, improving the efficiency of clamping and releasing in batch operations.

[0011] Optionally, the circuit board painting device further includes a second support mechanism; the second support mechanism includes a second support bar, a second clamping group, and a second locking member; the second support bar is mounted on the main support frame, and multiple sets of the second clamping groups are distributed along the extension direction parallel to the upper support portion. Each set of the second support group includes two second clamping members that are sequentially distributed and slide along the length direction of the second support bar, and each set of the second clamping groups is used to clamp a single circuit board; the second locking member is used to lock the second clamping group. The main support frame is equipped with a drive assembly. The main support frame is connected to the first support bar through the drive assembly and drives the first support bar to move, so that the first support bar has a painting state and a picking state. When the first support bar is in the painting state, the first clamping group and the second clamping group can move to abut against each other and alternately arrange the circuit board; when the first support bar is in the picking state, the first clamping group and the second clamping group separate, and at the same time the lower support part leaves the circuit board clamped by the second clamping group.

[0012] By adopting the above technical solution, the first support bar is switched between a painting state and a picking state via a drive component. In the painting state, the two sets of clamping mechanisms are arranged alternately and closely abut each other, enabling high-density, continuous arrangement of circuit boards and maximizing the use of the painting space. In the picking state, the two sets of mechanisms separate, and the circuit boards are arranged in an interlaced manner, forming sufficient picking space, which facilitates operators or robotic arms to pick up the boards one by one.

[0013] Optionally, a secondary support frame is vertically adjustable on the working bar. When the lower support part leaves the circuit board held by the second clamping group, the secondary support frame moves to support the bottom side of the circuit board held by the second clamping group.

[0014] By adopting the above technical solution, a vertically adjustable secondary support frame is set on the workbench. When the first support bar is switched to the pick-up state and the lower support part is detached from the circuit board, the secondary support frame can move in time and provide auxiliary support.

[0015] Optionally, the second locking member includes a second air tube connected to the second support bar, the second air tube passing through all the second clamping members; when the second air tube is inflated, it abuts against the second clamping members to restrict the movement of the second clamping members relative to the second support bar.

[0016] Optionally, the drive assembly includes a telescopic rod, a rotational power, and a telescopic power; one end of the telescopic rod is rotatably connected to the upper support portion and driven to rotate by the rotational power, and the other end of the telescopic rod is connected to the first support bar; the telescopic power is used to drive the telescopic rod to extend or retract, so as to adjust the distance between the upper support portion and the lower support portion.

[0017] Optionally, the main support frame has a guide rail that extends in an arc with the rotating end of the telescopic rod as the center, the second support bar moves along the extension direction of the guide rail on the guide rail, and a detachable synchronizing element is provided between the first support bar and the second support bar.

[0018] By adopting the above technical solution, an arc-shaped guide rail is set on the main support frame, allowing the second support bar to move along the guide rail. Simultaneously, a detachable synchronizing element enables linkage with the first support bar. This allows the second support bar to move synchronously with the first support bar when needed, while moving independently at other stages, enhancing the process flexibility and functional expandability of the device.

[0019] Optionally, the synchronizing element includes a connecting rod and two insert rods, each of which is disposed at one end of the connecting rod, and the two insert rods in the synchronizing element can be simultaneously inserted into the first support bar and the second support bar, respectively.

[0020] Secondly, this application provides a circuit board painting process, which adopts the following technical solution: A circuit board painting process, comprising: Includes the following steps: S1, the first support bar is moved to the painting state by the drive component; S2, place the circuit board on the lower support part and simultaneously support it on the upper support part, and clamp two adjacent circuit boards respectively by the first clamping group and the second clamping group, and then adjust the first locking member and the second locking member to the locked state. S3, spray paint the circuit board; S4, the second support bar is moved to the picking state by the drive component so that the positions of the two adjacent circuit boards are staggered, so that a picking space is formed on both sides of the circuit board; S5, release the first and second locking components, and remove the circuit boards one by one.

[0021] In summary, this application includes at least one of the following beneficial effects: 1. Through the combined action of upper and lower support and lateral clamping, the circuit board is tilted during painting, which makes it easier to expose the paint surface of the circuit board for easy painting, while making the circuit board less prone to displacement or vibration during painting, thus improving the stability of the circuit board during the painting process. 2. By controlling the movement of the first support mechanism through the drive component, the circuit boards can be closely arranged during painting to improve space utilization, and can be staggered and separated during board removal to form sufficient operating space, thereby improving the convenience and efficiency of operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application; Figure 2 This is a schematic diagram of the circuit board being painted in Embodiment 1 of this application; Figure 3 yes Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the structure of the first support mechanism in the retrieval state in Embodiment 1 of this application; Figure 5 yes Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this application; Figure 7 yes Figure 7 A magnified structural diagram at point C.

[0023] Explanation of reference numerals in the attached drawings: 1. Spray painting cabinet; 2. Workbench; 3. Spray painting chamber; 4. Main support frame; 5. Upper support part; 6. First support mechanism; 61. First support bar; 62. First clamping assembly; 621. First clamping component; 6211. First moving ring; 6212. First clamping piece; 63. First locking component; 631. First air pipe; 7. Lower support part; 8. Second support mechanism; 81. Second support bar; 82. Second clamping assembly; 821. Second clamping component; 821 1. Second moving ring; 8212. Second clamping piece; 83. Second locking element; 831. Second air pipe; 9. Drive assembly; 91. Telescopic rod; 911. Main rod; 912. Secondary rod; 92. Rotational power; 93. Telescopic power; 10. Secondary support frame; 11. Guide rail; 12. Synchronizer; 121. Connecting rod; 122. Insert rod; 13. Water curtain plate; 14. Exhaust duct; 15. First mounting base; 16. Second mounting base; 17. Guide strip hole; 18. Guide section. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 This application will be described in further detail.

[0025] Example 1: This application discloses a circuit board painting apparatus. (Refer to...) Figure 1 and Figure 2 The circuit board painting device includes a painting cabinet 1, a main support frame 4, and a first support mechanism 6. The main support frame 4 is mounted on the painting cabinet 1, and the first support mechanism 6 is mounted on the main support frame 4 and together with the main support frame 4, supports the circuit board.

[0026] Reference Figure 1 The spray booth 1 is a water curtain spray booth with a spray chamber 3 connected to the external environment. One side of the spray chamber 3 is connected to the external environment, and a water curtain plate 13 is installed in the spray chamber 3. A water pool is formed below the water curtain plate 13. Water is pumped onto the water curtain plate 13 to form a water curtain. An exhaust duct 14 is installed on the spray booth 1. During spraying, the exhaust duct 14 can provide a suction force to make the paint mist float towards the water curtain, so that the paint mist falls into the water pool under the action of the water curtain. The wastewater in the water pool is filtered and then pumped back to the water curtain plate 13 for recycling. A workbench 2 is also installed on the side of the spray chamber 3 closest to the external environment for installing the main support frame 4. The main support frame is installed on the upper surface of the workbench 2 and located in the spray chamber 3.

[0027] Reference Figure 2For the main support frame 4, the main support frame 4 has an upper support part 5 in the shape of a long bar. The length of the upper support part 5 extends horizontally along the width of the paint spraying cavity 3. The upper support part 5 supports the circuit board by the side of its top that is close to the external environment.

[0028] Reference Figure 2 and Figure 3 The first support mechanism 6 includes a first support bar 61, a first clamping assembly 62, and a first locking member 63. The first support bar 61 is mounted on the main support frame 4 and is a long, rod-shaped component parallel to the upper support portion 5, and is closer to the external environment than the upper support portion 5. The side of the first support bar 61 facing the upper support portion 5 has a lower support portion 7 protruding from the surface of the upper support bar. The lower support portion 7 extends together with the first support bar 61, and an angle is formed between the lower support portion 7 and the first support bar 61 for placing the circuit board.

[0029] Multiple first clamping groups 62 extend parallel to the length of the first support bar 61 and are movable on the first support bar 61. Each first clamping group 62 is used to clamp a single circuit board. Each first clamping group 62 includes two first clamping members 621 distributed and sliding along the length of the first support bar 61. The first clamping member 621 includes a first moving ring 6211 and a first clamping piece 6212. The first moving ring 6211 is slidably sleeved on the first support bar 61 and has a notch to accommodate the lower support portion 7. The first clamping piece 6212 is fixed to the first moving ring 6211 and has the same thickness as the first moving ring 6211. The first clamping group 62 clamps the circuit board by contacting the side of the circuit board through the first clamping piece 6212. Furthermore, the surface of the first clamping piece 6212 can contact the circuit board through a rubber layer to further protect the circuit board.

[0030] The first locking element 63 is used to lock the first clamping assembly 62. The first locking element 63 includes a first air pipe 631. Specifically, the two ends of the first support bar 61 that are far apart from each other are fixed with first mounting bases 15. The first air pipe 631 is fixed to the first mounting bases 15, and one end of the first air pipe 631 is sealed, while the other end extends to the outside of the paint spraying cabinet 1 and is connected to an air pump. The first air pipe 631 is a flexible hose with a certain elasticity, and the material can be PVC, fabric, rubber, etc. The portion of the first air pipe 631 located between the two first mounting bases 15 is parallel to the first support bar 61.

[0031] Simultaneously, all the first clamping members 621 are located between the two first mounting seats 15, and the first moving ring 6211 is simultaneously sleeved on the first air tube 631. When the first air tube 631 is not inflated, it is in a soft and foldable state, at which time the first clamping member 621 can move on the first support bar 61. When the first air tube 631 is inflated, the first air tube 631 expands and presses against the first moving ring 6211. At this time, the friction between the first air tube 631 and the first moving ring 6211 restricts the movement of the first moving ring 6211 relative to the first support bar 61, thereby locking the first clamping member 621.

[0032] When placing the circuit board, the lower support 7 is lower than the upper support 5. At this time, the bottom of the circuit board rests on the lower support 7 and abuts against the surface of the first support strip 61, while the upper part of the circuit board is supported by the upper support 5, thus tilting the circuit board. Simultaneously, after the circuit board is clamped and abutted by the first clamping members 621 in the same group on both sides, the first air pipe 631 is inflated to limit the position of the first clamping members 621. During painting, the lower support 7 is kept lower than the upper support 5 to facilitate painting operations by manual or automatic painting mechanisms.

[0033] Reference Figure 2 and Figure 4 Because the gaps between adjacent circuit boards are small when they are placed, it is inconvenient to handle them manually or mechanically. Therefore, the circuit board painting device further includes a second support mechanism 8, and the main support frame 4 has a drive assembly 9 for moving the first support mechanism 6. During the placement and painting of the circuit boards, the circuit boards are placed on the lower support 7 and alternately clamped by the first support mechanism 6 and the second support mechanism 8. When it is necessary to remove the circuit boards, the first support mechanism 6 is moved to alternately misalign the circuit boards, thereby increasing the retrieval space and improving the convenience of handling the circuit boards.

[0034] Reference Figure 4 and Figure 5Specifically, the second support mechanism 8 includes a second support bar 81, a second clamping group 82, and a second locking member 83. The second support bar 81 is similar in shape to the first support bar 61 and parallel to it. The second support bar 81 is mounted on the main support frame 4 and located between the upper support portion 5 and the first support bar 61. In this embodiment, the second support bar 81 is fixed to the main support frame 4. The second clamping group 82 extends parallel to the length of the second support bar 81 and is provided in multiple groups. Each group of second clamping groups 82 is used to clamp a single circuit board. Each group of second clamping groups 82 includes two second clamping members 821 that are distributed and slide along the length of the second support bar 81. The second clamping member 821 includes a second movable ring 8211 and a second clamping piece 8212. The second movable ring 8211 is slidably sleeved on the second support bar 81, and the second clamping piece 8212 is fixed on the second movable ring 8211 and has the same thickness as the second movable ring 8211. The second clamping assembly 82 clamps the circuit board by contacting the side of the circuit board through the second clamping piece 8212.

[0035] The second locking member 83 is used to lock the second clamping assembly 82. The second locking member 83 includes a second air pipe 831. The two ends of the second support bar 81 that are far apart from each other have second mounting seats 16 for fixing the second air pipe 831. The material of the second air pipe 831 is the same as that of the first air pipe 631. The cooperation method between the second air pipe 831, the second mounting seat 16 and the second moving ring 8211 is the same as that between the first air pipe 631, the first mounting seat 15 and the first moving ring 6211. The second air pipe 831 is connected to an air pump. It is not described in detail here. That is, the second moving ring 8211 can slide relative to the second support bar 81 by releasing air from the second air pipe 831. The second moving ring 8211 is locked by inflating the second air pipe 831.

[0036] Reference Figure 2 For the drive assembly 9, the main support frame 4 is connected to the first support bar 61 through the drive assembly 9 and drives the first support bar 61 to move, so that the first support bar 61 has a painting state and a picking state. The drive assembly 9 includes a telescopic rod 91, a rotational power 92, and a telescopic power 93.

[0037] The telescopic rod 91 includes a main rod 911 and a secondary rod 912. One end of the main rod 911 slides along its length within the secondary rod 912. The end of the main rod 911 furthest from the secondary rod 912 is rotatably connected to the end of the upper support 5 and driven to rotate by a rotational power 92. The end of the secondary rod 912 furthest from the main rod 911 is fixedly connected to the end of the first support bar 61. The rotational power 92 is a motor. The telescopic power 93 can be a cylinder or an electric push rod. The base of the telescopic power 93 is connected to the secondary rod 912, and the telescopic end of the telescopic power 93 is connected to the main rod 911. By extending and retracting the telescopic power 93, the total length of the telescopic rod 91 is adjusted, thereby adjusting the distance between the upper support 5 and the lower support 7, improving the adaptability of the device.

[0038] Reference Figure 2 When the first support bar 61 is adjusted and moved to the painting state, the telescopic end of the telescopic power 93 is in a retracted state, the height of the lower support part 7 is lower than the height of the upper support part 5, and at this time the first support mechanism 6 and the second support mechanism 8 are close to each other. The first clamping group 62 and the second clamping group 82 are alternately distributed along the length extension direction of the first support bar 61, and the first clamping piece 6212 and the second clamping piece 8212 have overlapping parts in the length direction of the first support bar 61. At this time, the circuit board is placed on the lower support part 7 and located in each of the first clamping group 62 and the second clamping group 82, and the first clamping piece 6212 and the second clamping piece 8212 located between two adjacent circuit boards abut against each other, so that the circuit boards are tightly arranged. Then, the expansion of the first air pipe 631 and the second air pipe 831 limits the first clamping piece 6212 and the second clamping piece 8212. The circuit board is then painted in this state. The first clamping member 621, located at one end edge of the first support bar 61, is fixed to the first support bar 61 as an indicator indicating the placement of the first circuit board.

[0039] Reference Figure 4 After the painting is completed, adjust the first support bar 61 to the retrieval position. First, extend the telescopic end of the telescopic power 93, causing the lower support part 7 to separate from the circuit board held by the second clamping group 82. Then, rotate the telescopic rod 91 upwards using the rotation power 92, completely separating the first clamping group 62 from the second clamping group 82 and releasing the contact. In this state, there is sufficient space to retrieve the circuit board on both sides. Then, release air from the first air pipe 631 and the second air pipe 831, allowing the first clamping group 62 and the second clamping group 82 to release their grip on the circuit board, after which the circuit board can be retrieved.

[0040] After the first clamping group 62 releases its grip on the circuit board, the circuit board remains stable under the combined support of the upper support part 5 and the lower support part 7. A secondary support frame 10 is vertically adjustable on the worktable 2. The secondary support frame 10 is a long strip parallel to the second support bar 81. When the lower support part 7 leaves the circuit board clamped by the second clamping group 82, the secondary support frame 10 moves to support the bottom side of the circuit board clamped by the second clamping group 82, so that after the second clamping group 82 releases its grip on the circuit board, the circuit board remains stable under the combined support of the upper support part 5 and the secondary support frame 10.

[0041] Specifically, in this embodiment, the auxiliary support frame 10 is adjusted via a multi-stage electric push rod. In other embodiments, the auxiliary support frame 10 can also be height-adjusted via a cylinder or a lead screw and nut adjustment mechanism.

[0042] This application also discloses a circuit board painting process, including the following steps: S1, the first support bar 61 is moved to the painting state by the drive component 9.

[0043] S2, the circuit board is placed on the lower support part 7 and simultaneously supported by the upper support part 5, and two adjacent circuit boards are clamped by the first clamping group 62 and the second clamping group 82 respectively. After the adjacent first clamping member 621 and second clamping member 821 are pressed together, the first air tube 631 and the second air tube 831 are inflated, so that the first air tube 631 is pressed together with the first clamping member 621 and the second air tube 831 is pressed together with the second clamping member 821, thereby locking the first clamping member 621, the second clamping member 821 and the circuit board.

[0044] S3, use a spray gun or automatic spray painting equipment to spray paint the circuit board. During the spray painting process, the spray painting cabinet 1 continuously forms a water curtain and the exhaust duct 14 is opened.

[0045] S4, restart the drive assembly 9 to change the rotation and extension state of the telescopic rod 91, so that the first support bar 61 moves to the picking state, and then move the secondary support frame 10 upward to support the circuit board held by the second clamping group 82. At this time, the first clamping group 62 and the second clamping group 82 separate, and the adjacent circuit boards are staggered, making it convenient for operators or robotic arms to pick them up.

[0046] S5, release air from the first air tube 631 and the second air tube 831 to release the locking of the first locking member 63 and the second locking member 83, and then remove the circuit boards one by one.

[0047] Example 2: The difference between this embodiment and Embodiment 1 is that the installation method of the second support bar 81 is different.

[0048] Reference Figure 6 and Figure 7 Specifically, in this embodiment, the main support frame 4 has a guide rail 11, which is an arc shape coaxial with the rotation axis of the telescopic rod 91. The guide rail 11 has a guide bar hole 17 along its own arc extension direction, and the two ends of the second support bar 81 that are far apart from each other have arc-shaped guide parts 18. The guide parts 18 cooperate with the guide bar hole 17 and slide in the guide bar hole 17 to guide the movement of the second support bar 81 along the extension direction of the guide rail 11.

[0049] Furthermore, a detachable synchronizing element 12 is provided between the first support bar 61 and the second support bar 81. The synchronizing element 12 is used to connect the first support bar 61 and the second support bar 81, so that when the first support bar 61 moves in an arc, it drives the second support bar 81 to move synchronously along the guide rail 11.

[0050] In this embodiment, the synchronizing element 12 includes a connecting rod 121 and two insert rods 122. The insert rods 122 are two in number and fixed to both ends of the connecting rod 121, perpendicular to the connecting rod 121. Both the end of the first support bar 61 and the guide portion 18 have insertion holes for the insert rods 122 to be inserted into. The connection is completed by inserting the two insert rods 122 on the synchronizing element 12 into the first support bar 61 and the guide portion 18, respectively. In some embodiments, the connecting rod 121 can also be an adjustable-length telescopic type to accommodate the distance between the first support bar 61 and the second support bar 81. In some embodiments, the insert rods 122 can be magnetically attracted into the insertion holes after insertion, thereby improving the stability of the synchronizing element 12.

[0051] This application also discloses a circuit board painting process, including the following steps: S1 to S3 are the same as in Example 1.

[0052] S4, install the synchronizing component 12 onto the first support bar 61 and the second support bar 81, and then drive the telescopic rod 91 to rotate through the rotation power 92, so that the first support bar 61 and the second support bar 81 move to a position where the painted surface of the circuit board is horizontal, and the circuit board undergoes preliminary drying in a horizontal state for a period of time.

[0053] S5, after the paint has initially dried, remove the synchronizing component 12, and then extend the auxiliary rod 912 away from the main rod 911 using the telescopic force 93, so that the lower support part 7 leaves the circuit board held by the second clamping group 82. Then move the second support bar 81 downward along the guide rail 11, so that the positions of the circuit board held by the first clamping group 62 and the circuit board held by the second clamping group 82 are staggered, forming a retrieval space.

[0054] S6, release air from the first air pipe 631 and the second air pipe 831 to release the locking of the first locking member 63 and the second locking member 83, and then remove the circuit boards one by one.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A circuit board spray painting device, characterized in that, include: The paint spraying cabinet has a workbench and a paint spraying chamber that communicates with the external environment, the paint spraying chamber being opposite to the workbench; The main support frame is installed on the workbench and located in the paint spraying chamber. It has an upper support portion extending in a straight line. The upper support portion is used to support the circuit board and to allow the circuit board to be arranged sequentially along the length extension direction of the upper support portion. as well as The first support mechanism includes a first support bar, a first clamping group, and a first locking member; the first clamping group is movable on the first support bar along a direction parallel to the upper support portion and is provided in multiple groups, each group of the first clamping group is used to clamp a single circuit board; the first locking member is used to lock the first clamping group; and the first support bar has a lower support portion parallel to the upper support portion for supporting the bottom side of the circuit board; During painting, the height of the lower support is lower than the height of the upper support.

2. The circuit board spraying device according to claim 1, characterized in that: The first clamping group includes two first clamping members that are distributed and slide along the length of the first support bar.

3. The circuit board spraying device according to claim 2, characterized in that: The first locking member includes a first air tube connected to the first support bar, and the first air tube passes through all the clamping members; when the first air tube is inflated, it abuts against the first clamping member to restrict the movement of the first clamping member relative to the first support bar.

4. The circuit board spraying device according to claim 2, characterized in that: The circuit board painting device also includes a second support mechanism; the second support mechanism includes a second support bar, a second clamping group, and a second locking member; the second support bar is installed on the main support frame, and multiple sets of the second clamping groups are distributed along the extension direction parallel to the upper support portion. Each set of the second support group includes two second clamping members that are sequentially distributed and slide along the length direction of the second support bar, and each set of the second clamping groups is used to clamp a single circuit board; the second locking member is used to lock the second clamping group; The main support frame is equipped with a drive assembly. The main support frame is connected to the first support bar through the drive assembly and drives the first support bar to move, so that the first support bar has a painting state and a picking state. When the first support bar is in the painting state, the first clamping group and the second clamping group can move to abut against each other and alternately arrange the circuit board; when the first support bar is in the picking state, the first clamping group and the second clamping group separate, and at the same time the lower support part leaves the circuit board clamped by the second clamping group.

5. A circuit board painting device according to claim 4, characterized in that: The working bar has a secondary support frame that can be adjusted and moved vertically. When the lower support part leaves the circuit board held by the second clamping group, the secondary support frame moves to support the bottom side of the circuit board held by the second clamping group.

6. The circuit board spraying device according to claim 4, characterized in that: The second locking member includes a second air tube connected to the second support bar, and the second air tube passes through all the second clamping members; when the second air tube is inflated, it abuts against the second clamping members to restrict the movement of the second clamping members relative to the second support bar.

7. A circuit board painting device according to claim 4, characterized in that: The drive assembly includes a telescopic rod, a rotational power, and a telescopic power; one end of the telescopic rod is rotatably connected to the upper support and driven to rotate by the rotational power, and the other end of the telescopic rod is connected to the first support bar; The telescopic force is used to drive the telescopic rod to extend and retract, so as to adjust the distance between the upper support and the lower support.

8. The circuit board spraying device according to claim 7, characterized in that: The main support frame has a guide rail that extends in an arc with the rotating end of the telescopic rod as the center. The second support bar moves along the extension direction of the guide rail and is on the guide rail. A synchro component is detachably connected between the first support bar and the second support bar.

9. A circuit board spraying device according to claim 8, characterized in that: The synchronizing element includes a connecting rod and two insert rods, which are respectively disposed at both ends of the connecting rod, and the two insert rods in the synchronizing element can be simultaneously inserted into the first support bar and the second support bar respectively.

10. A circuit board painting process, applicable to the circuit board painting apparatus according to any one of claims 4 to 9, characterized in that, Includes the following steps: S1, the first support bar is moved to the painting state by the drive component; S2, place the circuit board on the lower support part and simultaneously support it on the upper support part, and clamp two adjacent circuit boards respectively by the first clamping group and the second clamping group, and then adjust the first locking member and the second locking member to the locked state. S3, spray paint on the circuit board; S4, the second support bar is moved to the picking state by the drive component so that the positions of the two adjacent circuit boards are staggered, so that picking space is formed on both sides of the circuit board; S5, release the first and second locking components, and remove the circuit boards one by one.

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