阅读说明：本技术 一种pcb板刷料设备及刷料方法 (PCB brushing equipment and brushing method ) 是由 张冬冬 王秀梅 蒲生星 邰东升 张严 于 2020-06-08 设计创作，主要内容包括：本发明公开了一种PCB板刷料设备及刷料方法,属于PCB板刷料设备技术领域,包括浸染箱及其设置在浸染箱一侧的预热箱,浸染箱的另一侧设有烘干箱,烘干箱远离浸染箱的一侧设有出料箱,预热箱的内壁固定连接有支撑板,支撑板上安装有PCB板固定装置,PCB板固定装置上设有多个PCB板夹子。本发明通过PCB板夹子夹住PCB板,先进行预热及烘干,去除潮气进行预热,以便涂料可以很好的粘在PCB板表面,再将PCB板缓慢竖直插入涂料溶液的内部,防止气泡产生,确保完全覆膜并减少材料浪费,然后将PCB板推入烘干箱进行烘干及紫外线加固,在刷料过程中通过空气压缩机、加热器、温度传感器和排风扇来调节装置内的温度。(The invention discloses a PCB (printed circuit board) brushing device and a PCB brushing method, belonging to the technical field of PCB brushing devices. According to the invention, the PCB is clamped by the PCB clamp, preheating and drying are firstly carried out, moisture is removed for preheating, so that the coating can be well adhered to the surface of the PCB, then the PCB is slowly and vertically inserted into the coating solution, bubbles are prevented from being generated, complete film covering is ensured, material waste is reduced, then the PCB is pushed into a drying box for drying and ultraviolet ray reinforcement, and the temperature in the device is adjusted by an air compressor, a heater, a temperature sensor and an exhaust fan in the brushing process.)

1. The PCB brushing equipment is characterized by comprising a dip-dyeing box (2) and a preheating box (1) arranged on one side of the dip-dyeing box (2), wherein a drying box (3) is arranged on the other side of the dip-dyeing box (2), a discharging box (4) is arranged on one side, away from the dip-dyeing box (2), of the drying box (3), a supporting plate (5) is fixedly connected to the inner wall of the preheating box (1), a PCB fixing device (10) is installed on the supporting plate (5), a plurality of PCB clamps (12) are arranged on the PCB fixing device (10), a first sliding door (33) is installed between the preheating box (1) and the dip-dyeing box (2), a first electric push rod (18) is installed at the top of the dip-dyeing box (2), a first motor (19) is fixedly connected to the other end of the first electric push rod (18), and a turnover plate (17) is installed on an output shaft of the first motor (19), the impregnation and dyeing machine is characterized in that a second sliding door (34) is arranged between the impregnation and dyeing box (2) and the drying box (3), a second motor (21) is installed on the inner wall of the discharging box (4), an output shaft of the second motor (21) is connected with a transmission belt (20), the transmission belt (20) is located inside the drying box (3) and the discharging box (4), the drying box (3) is far away from one end of the second sliding door (34) is provided with a third sliding door (35), the bottom of the inner wall of the preheating box (1) is provided with a first air compressor (27), the output end of the first air compressor (27) is connected with a first heater (28), the bottom of the inner wall of the drying box (3) is provided with a second air compressor (29), and the output end of the second air compressor (29) is connected with a second heater (30).

2. A PCB scrubbing apparatus as defined in claim 1, wherein said support plate (5) and said flip plate (17) are provided with T-shaped sliding grooves (6) at the top thereof, and said PCB fixing device (10) is provided with T-shaped grooves (11) at the bottom thereof for engaging with said T-shaped sliding grooves (6).

3. The PCB brushing device according to claim 1, wherein two second electric push rods (22) are fixedly arranged on the side wall of the preheating box (1) far away from the impregnation box (2), a first baffle plate (23) is arranged between the two second electric push rods (22), and the first baffle plate (23) is positioned on one side of the PCB fixing device (10).

4. The PCB brushing device according to claim 1, wherein the PCB clip (12) comprises a fixing clip (13), a clip spring (14) and a clip plate (15), the fixing clip (13) is arranged at both ends of the clip plate (15), the clip spring (14) is arranged on the fixing clip (13), and a PCB (16) is arranged between the fixing clips (13).

5. The PCB brushing device according to claim 1, wherein a push rod fixing plate (24) is arranged on the inner wall of the impregnation tank (2), a third electric push rod (25) is arranged at one end of the push rod fixing plate (24) close to the first sliding door (33), and a second baffle plate (26) is connected to the other end of the third electric push rod (25).

6. The PCB board brushing device according to claim 1, wherein a first exhaust fan (39) is installed at the top of the inner wall of the preheating box (1), a first temperature sensor (36) is installed at one side of the first exhaust fan (39), a second exhaust fan (40) is installed at the top of the inner wall of the dip-dyeing box (2), a second temperature sensor (37) is installed at one side of the second exhaust fan (40), a third exhaust fan (41) is installed at the top of the inner wall of the drying box (3), a third temperature sensor (38) is installed at one side of the third exhaust fan (41), and an ultraviolet radiation lamp (43) is installed at the other side of the third exhaust fan (41).

7. The PCB brushing device according to claim 6, wherein the first exhaust fan (39), the second exhaust fan (40) and the third exhaust fan (41) are provided with dust screens (42) on top.

8. The PCB brushing device according to claim 1, wherein the discharging box (4) is an open-top discharging box, an operation panel (31) is arranged on the outer wall of the preheating box (1), a drain valve (32) is arranged below the outer wall of the impregnation box (2), and a fourth sliding door (44) is arranged at one end of the preheating box (1) far away from the first sliding door (33).

9. A brushing method of PCB brushing equipment is characterized by comprising the following steps:

step 1: clamping the PCB (16) by using the PCB clamp (12), preheating and drying the PCB (16) by blowing hot air from the first air compressor (27) and the first heater (28), driving the first baffle (23) by the second electric push rod (22) to push the PCB fixing device (10) onto the turnover plate (17), driving the PCB fixing device (10) to rotate 180 degrees by the first motor (19), driving the turnover plate (17) by the first electric push rod (18) and inserting the PCB (16) into the coating solution in the dip-dyeing box (2);

step 2: after standing for a period of time, the first electric push rod (18) drives the turnover plate (17) to rise and then rotate 180 degrees to restore the original position, and when the heights of the turnover plate (17) and the transmission belt (20) are consistent, the third electric push rod (25) drives the second baffle plate (26) to push the PCB fixing device (10) onto the transmission belt (20);

and step 3: the second air compressor (29) and the second heater (30) blow hot air to dry the PCB (16), the ultraviolet radiation lamp (43) is turned on at the same time, and the dried PCB (16) is conveyed to the discharge box (4) through a conveying belt (20).

10. The brushing method of the PCB brushing equipment according to claim 9, wherein in step 1, a spring fixing plate (7) is arranged at one end of the turnover plate (17) close to the support plate (5), a limiting spring (8) is arranged on the spring fixing plate (7), an inclined fixing block (9) is arranged at the other end of the limiting spring (8), and the inclined fixing block (9) is in sliding connection with the turnover plate (17).

Technical Field

The invention relates to PCB brushing equipment, in particular to PCB brushing equipment and a brushing method, and belongs to the technical field of PCB brushing equipment.

Background

The PCB, also called printed circuit board, is an important electronic component, is a support for electronic components, is a carrier for electrical connection of electronic components, and is one of important components in the electronic industry, and is a printed circuit board, which is called printed circuit board for short, and is almost one of electronic devices, as small as electronic watches, calculators, as large as computers, communication electronic devices, and military weapon systems.

Moisture is the most common and destructive factor for PCB boards, and excessive moisture can greatly reduce the insulation resistance between conductors, accelerate high-speed decomposition, and corrode conductors, and we often see that the metal part of PCB board is caused by the chemical reaction of copper, water vapor and oxygen together with verdigris or without coating with tri-proof paint.

At present, the mode of manual brushing is generally adopted for coating the three-proofing paint on the PCB, so that an excellent coating effect can be produced on a smooth surface, the manual brushing method cannot ensure the complete film coating of the PCB and wastes time and labor, and the invention provides a new solution for solving the problems.

How to research a PCB brushing device and a brushing method which are time-saving and labor-saving and ensure complete film coating is a problem to be solved urgently at present.

Disclosure of Invention

The invention mainly aims to solve the defects of the prior art and provide the PCB brushing equipment and the PCB brushing method which are time-saving and labor-saving and ensure complete film coating.

The purpose of the invention can be achieved by adopting the following technical scheme:

a PCB brushing device comprises a dip dyeing box and a preheating box arranged on one side of the dip dyeing box, wherein a drying box is arranged on the other side of the dip dyeing box, a discharge box is arranged on one side, far away from the dip dyeing box, of the drying box, a supporting plate is fixedly connected to the inner wall of the preheating box, a PCB fixing device is installed on the supporting plate, a plurality of PCB clamps are arranged on the PCB fixing device, a first sliding door is installed between the preheating box and the dip dyeing box, a first electric push rod is installed at the top of the dip dyeing box, a first motor is fixedly connected to the other end of the first electric push rod, a turnover plate is installed on an output shaft of the first motor, a second sliding door is arranged between the dip dyeing box and the drying box, a second motor is installed on the inner wall of the discharge box, a transmission belt is connected to the output shaft of the second motor, and the transmission belt is positioned inside the drying box and the discharge box, the drying box is characterized in that a third sliding door is arranged at one end, far away from the second sliding door, of the drying box, a first air compressor is arranged at the bottom of the inner wall of the preheating box, the output end of the first air compressor is connected with a first heater, a second air compressor is arranged at the bottom of the inner wall of the drying box, and the output end of the second air compressor is connected with a second heater.

Preferably, the top of backup pad with the returning face plate all is equipped with T type spout, PCB board fixing device's bottom be equipped with T type spout mutually supported's T type recess.

Preferably, two second electric push rods are fixedly mounted on the side wall, far away from the impregnation box, of the preheating box, a first baffle is arranged between the two second electric push rods, and the first baffle is located on one side of the PCB fixing device.

Preferably, the PCB board clip includes fixation clamp, clip spring and clip board, the both ends of clip board all are equipped with the fixation clamp, install on the fixation clamp the clip spring, be equipped with the PCB board between the fixation clamp.

Preferably, a push rod fixing plate is arranged on the inner wall of the dip dyeing box, a third electric push rod is arranged at one end, close to the first sliding door, of the push rod fixing plate, and a second baffle is connected to the other end of the third electric push rod.

Preferably, first exhaust fan is installed at the inner wall top of preheating cabinet, first temperature sensor is installed to one side of first exhaust fan, the second exhaust fan is installed at the inner wall top of impregnation case, second temperature sensor is installed to one side of second exhaust fan, the third exhaust fan is installed at the inner wall top of stoving case, third temperature sensor is installed to one side of third exhaust fan, ultraviolet radiation lamp is installed to the opposite side of third exhaust fan.

Preferably, the top of first exhaust fan, second exhaust fan and the third exhaust fan all is equipped with the dust screen.

Preferably, the discharge box is a discharge box with an opening at the top, an operation panel is arranged on the outer wall of the preheating box, a drain valve is arranged below the outer wall of the dip-dyeing box, and a fourth sliding door is arranged at one end, far away from the first sliding door, of the preheating box.

A brushing method of PCB brushing equipment comprises the following steps:

step 1: clamping the PCB by using the PCB clamp, preheating and drying the PCB by hot air blown by the first air compressor and the first heater, driving the first baffle plate by the second electric push rod to push the PCB fixing device to the turnover plate, driving the PCB fixing device to rotate 180 degrees by the first motor, driving the turnover plate by the first electric push rod, and inserting the PCB into the coating solution in the dip dyeing box;

step 2: after standing for a period of time, the first electric push rod drives the turnover plate to rise and then rotate by 180 degrees to restore the original position, and when the turnover plate is consistent with the height of the transmission belt, the third electric push rod drives the second baffle plate to push the PCB fixing device to the transmission belt;

and step 3: and hot air blown out by the second air compressor and the second heater is used for drying the PCB, the ultraviolet irradiation lamp is turned on at the same time, and the dried PCB is conveyed to the discharge box by a transmission belt.

Preferably, in step 1, the turnover plate is characterized in that a spring fixing plate is arranged at one end, close to the support plate, of the turnover plate, a limiting spring is mounted on the spring fixing plate, an inclined plane fixing block is arranged at the other end of the limiting spring, and the inclined plane fixing block is in sliding connection with the turnover plate.

The invention has the beneficial technical effects that: according to the PCB brushing equipment and the brushing method of the invention, one end of a PCB is clamped by a PCB clamp and fixed on a support plate, the PCB is preheated and dried in a preheating box, moisture on the surface of the PCB is removed and the PCB is preheated so that paint can be well adhered to the surface of the PCB, then the support plate is pushed onto a turnover plate, the turnover plate is turned over for 180 degrees and then drives the PCB to be slowly and vertically inserted into the paint solution, can prevent bubbles from generating, paint residues flow back to the inside of the dip dyeing box from the PCB to ensure complete film coating and reduce material waste, the turnover plate is turned over for 180 degrees to reset and pushes the PCB into the inside of the drying box for drying and ultraviolet ray reinforcement, the PCB is conveyed to the discharging box by a driving belt after being dried, the temperature in the device is adjusted through the air compressor, the heater, the temperature sensor and the exhaust fan in the brushing process, and the brushing quality is guaranteed.

Drawings

Fig. 1 is a front view of an overall structure of a preferred embodiment of a PCB board brushing apparatus and a brushing method according to the present invention;

fig. 2 is a plan view of an overall structure of a preferred embodiment of the PCB board brushing apparatus and the brushing method according to the present invention;

fig. 3 is a schematic overall structure view of a preferred embodiment of the PCB board brushing apparatus and the brushing method according to the present invention;

fig. 4 is a schematic structural view of a first sliding door according to a preferred embodiment of the PCB board brushing apparatus and the brushing method according to the present invention;

fig. 5 is a schematic structural view of a supporting plate according to a preferred embodiment of the PCB board brushing apparatus and the brushing method according to the present invention;

fig. 6 is a schematic structural view of a PCB fixing device according to a preferred embodiment of the PCB board brushing apparatus and the brushing method of the present invention;

fig. 7 is a schematic structural view of a PCB clip according to a preferred embodiment of the PCB board brushing apparatus and the brushing method of the present invention;

fig. 8 is a front view of a bevel fixing block structure according to a preferred embodiment of the PCB board brushing apparatus and the brushing method according to the present invention.

In the figure: 1-preheating box, 2-dip dyeing box, 3-drying box, 4-discharging box, 5-supporting plate, 6-T type chute, 7-spring fixing plate, 8-limiting spring, 9-inclined plane fixing block, 10-PCB fixing device, 11-T type groove, 12-PCB clamp, 13-fixing clamp, 14-clamp spring, 15-clamp plate, 16-PCB, 17-turnover plate, 18-first electric push rod, 19-first motor, 20-transmission belt, 21-second motor, 22-second electric push rod, 23-first baffle, 24-push rod fixing plate, 25-third electric push rod, 26-second baffle, 27-first air compressor, 28-first heater, 29-second air compressor, 30-a second heater, 31-an operation panel, 32-a drain valve, 33-a first sliding door, 34-a second sliding door, 35-a third sliding door, 36-a first temperature sensor, 37-a second temperature sensor, 38-a third temperature sensor, 39-a first exhaust fan, 40-a second exhaust fan, 41-a third exhaust fan, 42-a dust screen, 43-an ultraviolet irradiation lamp, 44-a fourth sliding door.

Detailed Description

In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in fig. 1-8, the PCB board brushing apparatus provided in this embodiment includes a dip-dyeing box 2 and a preheating box 1 disposed on one side of the dip-dyeing box 2, a drying box 3 is disposed on the other side of the dip-dyeing box 2, a discharging box 4 is disposed on one side of the drying box 3 away from the dip-dyeing box 2, a supporting plate 5 is fixedly connected to an inner wall of the preheating box 1, a PCB board fixing device 10 is mounted on the supporting plate 5, a plurality of PCB board clips 12 are disposed on the PCB board fixing device 10, a first sliding door 33 is mounted between the preheating box 1 and the dip-dyeing box 2, a first electric push rod 18 is mounted on a top of the dip-dyeing box 2, a first motor 19 is fixedly connected to the other end of the first electric push rod 18, a turning plate 17 is mounted on an output shaft of the first motor 19, a second sliding door 34 is disposed between the dip-dyeing box 2 and the drying box 3, a second motor 21 is mounted on an inner wall of the, the driving belt 20 is located inside the drying box 3 and the discharging box 4, one end of the drying box 3, which is far away from the second sliding door 34, is provided with a third sliding door 35, the bottom of the inner wall of the preheating box 1 is provided with a first air compressor 27, the output end of the first air compressor 27 is connected with a first heater 28, the bottom of the inner wall of the drying box 3 is provided with a second air compressor 29, and the output end of the second air compressor 29 is connected with a second heater 30. According to the PCB brushing equipment and the PCB brushing method, one end of a PCB is clamped by a PCB clamp and is fixed on a supporting plate, the PCB is preheated and dried in a preheating box, moisture on the surface of the PCB is removed and the PCB is preheated so that paint can be well adhered to the surface of the PCB, the supporting plate is pushed to a turnover plate, the turnover plate is turned over for 180 degrees and then drives the PCB to be slowly and vertically inserted into the paint solution, bubbles can be prevented from being generated, paint residues flow back to the inside of a dip-dyeing box from the PCB, complete film covering is ensured, material waste is reduced, the turnover plate is turned over for 180 degrees again and reset, the PCB is pushed into the drying box for drying and ultraviolet ray reinforcement, the PCB is conveyed to a discharging box by a driving belt after drying, the temperature in the device is adjusted by an air compressor, a heater, a temperature sensor and an exhaust fan in the brushing process, and the brushing quality is ensured. The temperature is isolated through gliding first sliding door 33 between preheating cabinet 1 and the dip-dyeing case 2, and the temperature is isolated through second sliding door 34 between dip-dyeing case 2 and the stoving case 3, and the temperature is isolated through third sliding door 35 between stoving case 3 and the ejection of compact case 4. The tearable solder resist is used to cover the parts of the general connector, the software socket, the switch, the heat sink, the heat dissipation area, the insertion plate area, etc. which are not allowed to have the coating material.

In the present embodiment, as shown in fig. 5 and 6, the top of the supporting plate 5 and the top of the flipping plate 17 are both provided with T-shaped sliding grooves 6, and the bottom of the PCB fixing device 10 is provided with T-shaped grooves 11 which are matched with the T-shaped sliding grooves 6. Sliding connection is adopted between the T-shaped groove 11 at the bottom of the PCB fixing device 10 and the T-shaped sliding groove 6 at the top of the supporting plate 5 and the turnover plate 17, so that the PCB fixing device 10 is prevented from falling off when the turnover plate 17 is turned over.

In the present embodiment, as shown in fig. 1 and 7, two second electric push rods 22 are fixedly mounted on the side wall of the preheating box 1 away from the impregnation box 2, a first baffle 23 is disposed between the two second electric push rods 22, and the first baffle 23 is located on one side of the PCB fixing device 10. The PCB board clip 12 comprises fixing clips 13, clip springs 14 and clip boards 15, the fixing clips 13 are arranged at two ends of each clip board 15, the clip springs 14 are mounted on the fixing clips 13, and a PCB board 16 is arranged between the fixing clips 13. The PCB clamp 12 is manually opened outwards, the PCB 16 is placed between the two clamp plates 15, the fixing clamp 13 clamps the edge of the PCB 16 under the action of the clamp spring 14, and the PCB clamp 12 is made of rubber, so that the PCB 16 is prevented from being scratched.

In the present embodiment, as shown in fig. 1, a first exhaust fan 39 is installed on the top of the inner wall of the preheating box 1, a first temperature sensor 36 is installed on one side of the first exhaust fan 39, a second exhaust fan 40 is installed on the top of the inner wall of the impregnation box 2, a second temperature sensor 37 is installed on one side of the second exhaust fan 40, a third exhaust fan 41 is installed on the top of the inner wall of the drying box 3, a third temperature sensor 38 is installed on one side of the third exhaust fan 41, and an ultraviolet radiation lamp 43 is installed on the other side of the third exhaust fan 41. The top of the first exhaust fan 39, the second exhaust fan 40 and the third exhaust fan 41 are all provided with dust screens 42. Starting a first air compressor 27 and a first heater 28 to blow out hot air to preheat and dry the PCB 16, ensuring that the temperature inside the preheating box 1 is between 55 and 65 ℃, drying the PCB 16 inside the preheating box 1 for 15min, then putting the PCB into the dip-dyeing box 2 for dip-dyeing, slowly and vertically inserting the PCB 16 into a coating solution, slowly pulling out and standing the PCB after the PCB enters the preheating box for 1min, allowing most of the coating residues to drip from the PCB 16, ensuring complete film coating by dip-coating, avoiding material waste caused by over-spraying, ensuring that the temperature inside the dip-dyeing box 2 is not lower than 20 ℃ and the humidity is lower than 70 percent, absorbing moisture by using the PCB as a composite material, ensuring that the coating cannot fully protect the PCB if the humidity is too high, and carrying out temperature rise and drying treatment on the inside the dip-dyeing box 2 by opening a first sliding door 33 or a third sliding door 35 because a heating device is not arranged inside the dip-dyeing box 2, the impregnated PCB 16 is kept stand for a period of time and then enters the drying box 3 for drying treatment, the temperature inside the drying box 3 is ensured to be 140-160 ℃, the PCB 16 is cured by the ultraviolet radiation lamp 43, and the PCB 16 is dried in the drying box 3 for 30min and then is conveyed to the discharging box 4 by the transmission belt 20.

In the present embodiment, as shown in fig. 1 and fig. 2, a push rod fixing plate 24 is disposed on the inner wall of the dip dyeing box 2, a third electric push rod 25 is disposed at one end of the push rod fixing plate 24 close to the first sliding door 33, and a second baffle 26 is connected to the other end of the third electric push rod 25. The discharge box 4 is an open-top discharge box, an operation panel 31 is arranged on the outer wall of the preheating box 1, a drain valve 32 is arranged below the outer wall of the dip-dyeing box 2, and a fourth sliding door 44 is arranged at one end, far away from the first sliding door 33, of the preheating box 1. When the height of the turnover plate 17 is consistent with that of the transmission belt 20, the third electric push rod 25 drives the second baffle 26 to push the PCB fixing device 10 onto the transmission belt 20.

In this embodiment, as shown in fig. 1 and 8, a brushing method of a PCB board brushing apparatus includes the following steps: step 1: the PCB 16 is clamped by the PCB clamp 12, hot air is blown out by the first air compressor 27 and the first heater 28 to preheat and dry the PCB 16, the second electric push rod 22 drives the first baffle plate 23 to push the PCB fixing device 10 onto the turnover plate 17, the first motor 19 drives the PCB fixing device 10 to rotate 180 degrees, the first electric push rod 18 drives the turnover plate 17 and inserts the PCB 16 into the coating solution in the dip dyeing box 2; step 2: after standing for a period of time, the first electric push rod 18 drives the turnover plate 17 to rise and then rotate 180 degrees to restore the original position, and when the turnover plate 17 is consistent with the height of the transmission belt 20, the third electric push rod 25 drives the second baffle plate 26 to push the PCB fixing device 10 onto the transmission belt 20; and step 3: the second air compressor 29 and the second heater 30 blow out hot air to dry the PCB 16, and simultaneously turn on the ultraviolet radiation lamp 43, and the dried PCB 16 is conveyed to the discharging box 4 by the conveyor belt 20. In the step 1, a spring fixing plate 7 is arranged at one end, close to the supporting plate 5, of the turnover plate 17, a limiting spring 8 is installed on the spring fixing plate 7, an inclined plane fixing block 9 is arranged at the other end of the limiting spring 8, and the inclined plane fixing block 9 is in sliding connection with the turnover plate 17. When the second electric push rod 22 drives the first baffle plate 23 to push the PCB fixing device 10 to the turnover plate 17, the turnover plate 17 is turned over by 180 degrees anticlockwise, and then turned over by 180 degrees clockwise after standing by dip-coating, the inclined fixing block 9 limits the PCB fixing device 10 under the action of the limiting spring 8, and the PCB fixing device 10 is prevented from sliding down from the turnover plate 17 in the turning process.

In this embodiment, as shown in fig. 1 to 8, the working process of the PCB board brushing apparatus and the brushing method provided in this embodiment is as follows:

step 1: firstly, using tearable solder resist to cover parts which are not allowed to be coated with coating materials, controlling the fourth sliding door 44 to slide upwards by the operation panel 31, then opening the PCB clamp 12 outwards by hands, placing the PCB 16 between the two clamp plates 15, clamping the edge of the PCB 16 by the fixing clamp 13 under the action of the clamp spring 14, starting the first air compressor 27 and the first heater 28 by the operation panel 31 to blow hot air to preheat and dry the PCB 16, detecting the temperature in the preheating box 1 by the first temperature sensor 36, and starting the first row fan 39 to exhaust and dissipate heat when the temperature is too high;

step 2: the operation panel 31 controls the first sliding door 33 to slide downwards, the second electric push rod 22 is started to drive the first baffle plate 23 to push the PCB fixing device 10 to the turnover plate 17, the first sliding door 33 is reset, the inclined plane fixing block 9 limits the PCB fixing device 10 under the action of the limiting spring 8, the first motor 19 drives the turnover plate 17 to turn over 180 degrees anticlockwise, the first electric push rod 18 drives the turnover plate 17 to descend, the PCB 16 is slowly immersed in the coating solution, the first electric push rod 18 drives the PCB 16 to slowly ascend after dip-coating for 1min, the first electric push rod 18 rotates 180 degrees clockwise after standing for a period of time, the first electric push rod 18 drives the PCB 16 to ascend again, the second temperature sensor 37 detects the temperature inside the dip-dyeing box 2, when the temperature is too high, the second exhaust fan 40 is started to exhaust air and dissipate heat, and when the temperature is too low, the first sliding door 33 is opened to enable hot air in the preheating box 1 to enter the impregnation box 2;

and step 3: when the height of the turnover plate 17 is consistent with that of the transmission belt 20, the first electric push rod 18 stops working, the operation panel 31 controls the second sliding door 34 to slide downwards, the third electric push rod 25 drives the second baffle 26 to push the PCB fixing device 10 onto the transmission belt 20, the second sliding door 34 is reset, the operation panel 31 starts the second air compressor 29 and the second heater 30 to blow hot air to dry the PCB 16, the ultraviolet radiation lamp 43 is turned on to perform ultraviolet radiation reinforcement on the PCB 16, the third temperature sensor 38 detects the temperature inside the drying box 3, the ultraviolet radiation lamp 43 is started to perform air exhaust and heat dissipation when the temperature is too high, the operation panel 31 controls the third sliding door 35 to slide upwards after drying, and the PCB 16 is transmitted to the discharge box 4 through the transmission belt 20.

In summary, in the embodiment, according to the PCB board brushing apparatus and the brushing method of the embodiment, the temperature between the preheating box 1 and the dip-dyeing box 2 is isolated by the sliding first sliding door 33, the temperature between the dip-dyeing box 2 and the drying box 3 is isolated by the second sliding door 34, and the temperature between the drying box 3 and the discharging box 4 is isolated by the third sliding door 35. The method comprises the steps of firstly using tearable solder resist to cover parts which do not allow coating materials, such as a common connector, a software socket, a switch, a radiator, a heat dissipation area, a plug board area and the like, then opening a PCB clamp 12 outwards by hands, placing a PCB 16 between two clamp boards 15, clamping the edge of the PCB 16 by a fixing clamp 13 under the action of a clamp spring 14, and preventing the PCB 16 from being scratched by using the PCB clamp 12 made of rubber materials. Starting a first air compressor 27 and a first heater 28 to blow out hot air to preheat and dry the PCB 16, ensuring that the temperature inside the preheating box 1 is between 55 and 65 ℃, drying the PCB 16 inside the preheating box 1 for 15min, then putting the PCB into the dip-dyeing box 2 for dip-dyeing, slowly and vertically inserting the PCB 16 into a coating solution, slowly pulling out and standing the PCB after the PCB enters the preheating box for 1min, allowing most of the coating residues to drip from the PCB 16, ensuring complete film coating by dip-coating, avoiding material waste caused by over-spraying, ensuring that the temperature inside the dip-dyeing box 2 is not lower than 20 ℃ and the humidity is lower than 70 percent, absorbing moisture by using the PCB as a composite material, ensuring that the coating cannot fully protect the PCB if the humidity is too high, and carrying out temperature rise and drying treatment on the inside the dip-dyeing box 2 by opening a first sliding door 33 or a third sliding door 35 because a heating device is not arranged inside the dip-dyeing box 2, the impregnated PCB 16 is kept stand for a period of time and then enters the drying box 3 for drying treatment, the temperature inside the drying box 3 is ensured to be 140-160 ℃, the PCB 16 is cured by the ultraviolet radiation lamp 43, and the PCB 16 is dried in the drying box 3 for 30min and then is conveyed to the discharging box 4 by the transmission belt 20. When the second electric push rod 22 drives the first baffle plate 23 to push the PCB fixing device 10 to the turnover plate 17, the inclined plane fixing block 9 limits the PCB fixing device 10 under the action of the limiting spring 8, and the PCB fixing device 10 is prevented from sliding off the turnover plate 17 in the turnover process.

The above description is only for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the scope of the present invention.