Three-proofing paint coating device

Abstract

The utility model provides a three-proofing paint coating device which comprises a control platform, the control platform is connected with a cantilever, and the bottom end of the cantilever is connected with a painting structure; and the painting structure comprises a brush arranged close to the control platform, and the brush is used for coating a to-be-processed circuit board placed on the control platform with conformal coating. A to-be-processed circuit board is placed on the control platform, the position of the cantilever is adjusted through the control platform, and then the cantilever is controlled to drive the brush of the painting structure to brush conformal coating on the to-be-processed circuit board. Compared with a spraying device for spraying the conformal coating to the to-be-processed circuit board, the conformal coating brushing device has the advantages that the brush is controlled by the control platform to brush the conformal coating on the to-be-processed circuit board, conformal coating splashing can be avoided, and the conformal coating brushing device has high conformal coating brushing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board processing, in particular to a three-proof paint coating device. Background Art

[0002] In the field of PCBA (Printed Circuit Board Assembly), after electronic components are assembled on a blank PCB (Printed Circuit Board), the external environment has a significant impact on the assembled PCB. For example, water vapor, corrosive gases and salt spray in the external environment will change the structure of the assembled PCB, which may cause short circuit and leakage of the assembled PCB.

[0003] At present, the assembled PCB board is mainly protected by coating with conformal coating. The coating methods are divided into manual spraying and machine spraying. Manual spraying does not require a fixture, and machine spraying is suitable for mass production. However, both manual spraying and machine spraying may cause splashing of conformal coating, resulting in poor stability of the conformal coating process. If the conformal coating is applied manually by brushing, the brushing efficiency is low.

[0004] Therefore, a device is needed that can avoid splashing of conformal coating and has high brushing efficiency. Utility Model Content

[0005] In order to overcome the problems existing in the related art, the purpose of the utility model is to provide a three-conformal paint coating device, which can avoid splashing of the three-conformal paint and has a high brushing efficiency.

[0006] A conformal coating device comprises a control platform, the control platform is connected to a cantilever, and the bottom end of the cantilever is connected to a coating structure; the coating structure comprises a brush arranged near the control platform, and the brush is used to apply conformal coating to a circuit board to be processed placed on the control platform.

[0007] In a preferred technical solution of the utility model, the brush comprises a first pipe, and a brush head and a feeding end are arranged oppositely at two ends of the first pipe.

[0008] In a preferred technical solution of the utility model, the painting structure further includes a syringe and a fixing device, the syringe is fixed to the fixing device, and the injection end of the syringe is threadedly connected to the feeding end.

[0009] In a preferred technical solution of the utility model, the fixing device includes a connecting portion, and a first fixing portion and a second fixing portion are respectively provided at two ends of the connecting portion; the first fixing portion has a first opening, and the second fixing portion has a second opening.

[0010] In a preferred technical solution of the utility model, the end of the syringe away from the control platform passes through the first opening, and the injection end of the syringe passes through the second opening.

[0011] In a preferred technical solution of the utility model, the injection end gradually narrows along the direction approaching the feeding end.

[0012] In a preferred technical solution of the utility model, the triple-conformal paint coating device also includes an air pressure controller, the output end of the air pressure controller is connected to an air pipe, the end of the air pipe away from the air pressure controller is connected to the syringe, and the input end of the air pressure controller is connected to the control platform.

[0013] In a preferred technical solution of the utility model, a loading platform is arranged at one end of the control platform close to the cantilever, and the loading platform is provided with a fixing part for fixing the circuit board to be processed, the fixing part is provided with a screw hole, and the position of the loading platform is adjustable.

[0014] In a preferred technical solution of the utility model, the control platform includes a base and a bracket, the bracket includes a support part and a guide rail; the guide rail is connected to the support part, the support part is connected to the base, and the cantilever is slidably connected to the guide rail.

[0015] In a preferred technical solution of the utility model, the fixing device is detachably connected to the bottom end of the cantilever.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides a conformal coating device including a control platform, the control platform is connected to a cantilever, and the bottom end of the cantilever is connected to a painting structure; the painting structure includes a brush arranged near the control platform, and the brush is used to apply the conformal coating to the circuit board to be processed placed on the control platform. The circuit board to be processed is placed on the control platform, the position of the cantilever is adjusted by the control platform, and the cantilever is controlled to drive the brush of the painting structure to apply the conformal coating to the circuit board to be processed. Compared with using a spraying device to spray the conformal coating to the circuit board to be processed, the control platform controls the brush to apply the conformal coating to the circuit board to be processed, which can avoid splashing of the conformal coating and has a higher conformal coating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a first structural schematic diagram of the conformal coating device provided by the utility model;

[0019] Figure 2 This is a second structural schematic diagram of the conformal coating device provided by the utility model;

[0020] Figure 3 It is a structural schematic diagram of the brush, syringe and air pressure controller provided by the utility model;

[0021] Figure 4 It is a structural schematic diagram of the fixing device provided by the utility model;

[0022] Figure 5 It is a structural schematic diagram of the brush and syringe provided by the utility model;

[0023] Figure 6 It is a structural schematic diagram of the loading platform provided by the utility model.

[0024] Reference numerals:

[0025] 1. Control platform; 11. Base; 12. Bracket; 121. Support part; 122. Guide rail; 2. Cantilever; 3. Painting structure; 31. Brush; 311. First pipeline; 312. Brush head; 313. Feed end; 32. Syringe; 321. Injection end; 322. Tube cover; 33. Fixing device; 331. First fixing part; 332. Connecting part; 333. Second fixing part; 4. Air pressure controller; 5. Air pipe; 6. Loading platform; 61. Fixing piece; 62. Honeycomb plate. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0027] Example 1

[0028] like Figure 1 and Figure 3 As shown, this embodiment provides a conformal coating device, including a control platform 1, the control platform 1 is connected to a cantilever 2, and the bottom end of the cantilever 2 is connected to a coating structure 3; the coating structure 3 includes a brush 31 arranged near the control platform 1, and the brush 31 is used to apply the conformal coating to the circuit board to be processed placed on the control platform 1.

[0029] The cantilever 2 is connected to the control platform 1, and the power supply line of the control platform 1 is inserted into the power supply port of the cantilever 2 to supply power to the cantilever 2. The signal line of the control platform 1 is inserted into the signal receiving port of the cantilever 2 to control the movement of the cantilever 2.

[0030] The control platform 1 controls the cantilever 2 to move, and the cantilever 2 drives the painting structure 3 at the bottom to move, and the brush 31 of the painting structure 3 approaches the circuit board to be processed on the control platform 1. When the brush 31 is located above the painting area of ​​the circuit board to be processed, the control platform 1 controls the cantilever 2 to move downward until the brush 31 contacts the painting area, and the control platform 1 controls the cantilever 2 to swing left and right, and the cantilever 2 drives the brush 31 to swing left and right, so that the three-proof paint on the brush 31 is brushed to the painting area.

[0031] When the brush 31 deviates from the painting area, the control platform 1 controls the cantilever 2 to move, and the cantilever 2 drives the brush 31 to move, so that the brush 31 is located above the painting area. The control platform 1 then controls the cantilever 2 to drive the brush 31 to swing left and right, so that the three-proof paint on the brush 31 is brushed to the painting area.

[0032] The painting area of ​​the circuit board to be processed is calculated on a computer or other terminal with computing function, and the computer or other terminal with computing function sends the painting area to the control platform 1. The control platform 1 automatically controls the movement of the cantilever 2 according to the painting area, driving the brush 31 to apply the three-proof paint in the painting area.

[0033] The control platform 1 is provided with screw holes, and the cantilever 2 is connected to the control platform 1 through the screws and the screw holes. If there are fewer electronic components on the surface of the circuit board to be processed, a brush 31 with a larger width is selected, and the control platform 1 controls the cantilever 2 to drive the brush 31 to apply the three-proof paint to the paint area at a high rate; if there are more electronic components on the surface of the circuit board to be processed, and there are no electronic components with a height greater than the height threshold, a brush 31 with a smaller width is selected, and the control platform 1 controls the cantilever 2 to drive the brush 31 to apply the three-proof paint to the paint area at a low rate; if there are electronic components with a height greater than the height threshold on the surface of the circuit board to be processed, the electronic components with a height greater than the height threshold are avoided during the application of the three-proof paint. Preferably, the height threshold is set to 10 mm.

[0034] A conformal coating device provided in this embodiment includes a control platform 1, the control platform 1 is connected to a cantilever 2, and the bottom end of the cantilever 2 is connected to a painting structure 3; the painting structure 3 includes a brush 31 arranged near the control platform 1, and the brush 31 is used to apply the conformal coating to the circuit board to be processed placed on the control platform 1. The circuit board to be processed is placed on the control platform 1, the position of the cantilever 2 is adjusted by the control platform 1, and the cantilever 2 is controlled to drive the brush 31 of the painting structure 3 to brush the conformal coating on the circuit board to be processed. Compared with using a spraying device to spray the conformal coating on the circuit board to be processed, controlling the brush 31 to brush the conformal coating on the circuit board to be processed by the control platform 1 can avoid splashing of the conformal coating and has a higher conformal coating efficiency.

[0035] Example 2

[0036] like Figure 1 and Figure 3 As shown, a conformal coating device provided in this embodiment includes a control platform 1, the control platform 1 is connected to a cantilever 2, and the bottom end of the cantilever 2 is connected to a coating structure 3; the coating structure 3 includes a brush 31 arranged near the control platform 1, and the brush 31 is used to apply conformal coating to the circuit board to be processed placed on the control platform 1.

[0037] like Figure 2-Figure 5 As shown, the brush 31 comprises a first pipe 311 , and a brush head 312 and a feeding end 313 are oppositely disposed at two ends of the first pipe 311 .

[0038] The material of the feed end 313 is colloid, and the feed end 313 is provided with threads. The first pipe 311 is a hollow structure, which can allow the three-proof paint to flow. The width of the brush head 312 is 5 mm, 8 mm or 10 mm, and the length of the brush head 312 is 10 mm. The corresponding brush 31 is selected according to the size of the circuit board to be processed and the distribution of electronic components.

[0039] There are two ways to connect the brush head 312 and the first pipe 311. The first way is to open an opening at one end of the first pipe 311 close to the brush head 312, and the brush head 312 extends out of the opening as a whole, and the brush head 312 is glued to the edge of the opening. The second way is to set a thread at one end of the first pipe 311 close to the brush head 312, and the brush 31 also includes a connector, the first end of the connector is provided with a thread, and the second end of the connector is connected to the brush head 312. The first end of the connector is threadedly connected to the end of the first pipe 311 close to the brush head 312. Rotating the connector can tighten or loosen the connection between the connector and the first pipe 311. For example, rotating the connector counterclockwise can tighten the connection between the connector and the first pipe 311, thereby increasing the brushing pressure of the brush head 312; rotating the connector clockwise can loosen the connection between the connector and the first pipe 311, thereby reducing the brushing pressure of the brush head 312.

[0040] The painting structure 3 further includes a syringe 32 and a fixing device 33 . The syringe 32 is fixed to the fixing device 33 . The injection end 321 of the syringe 32 is threadedly connected to the feeding end 313 .

[0041] The fixing device 33 includes a connecting portion 332 , and a first fixing portion 331 and a second fixing portion 333 are respectively disposed at two ends of the connecting portion 332 ; the first fixing portion 331 is provided with a first opening, and the second fixing portion 333 is provided with a second opening.

[0042] One end of the syringe 32 away from the control platform 1 passes through the first opening, and the injection end 321 of the syringe 32 passes through the second opening.

[0043] The first fixing part 331 is located above the second fixing part 333. The end of the syringe 32 away from the control platform 1 has a larger diameter, and the end of the syringe 32 away from the control platform 1 passes through the first opening. The injection end 321 is the end of the syringe 32 close to the control platform 1. The injection end 321 has a smaller diameter, and the injection end 321 passes through the second opening. The combination of the first opening and the second opening can firmly clamp the syringe 32, thereby achieving the fixation of the syringe 32.

[0044] The injection end 321 of the syringe 32 is threadedly connected to the feeding end 313 , and the conformal coating in the syringe 32 flows from the injection end 321 into the feeding end 313 of the brush 31 .

[0045] The injection end 321 gradually narrows in the direction approaching the feed end 313, that is, the diameter of the injection end 321 gradually decreases in the direction approaching the feed end 313. The gradient injection end 321 can prevent the conformal coating in the syringe 32 from flowing into the feed end 313 of the brush 31 too quickly, so that the brush head 312 of the brush 31 can evenly apply the conformal coating on the circuit board to be processed.

[0046] Preferably, the capacity of the syringe 32 is 330 ml, the diameter of the injection end 321 is 8 mm, and the diameter of the end of the syringe 32 opposite to the injection end 321 is 55 mm.

[0047] The brush 31 of this embodiment includes a first pipe 311, and a brush head 312 and a feed end 313 are arranged at two opposite ends of the first pipe 311. The painting structure 3 also includes a syringe 32 and a fixing device 33, the syringe 32 is fixed to the fixing device 33, the injection end 321 of the syringe 32 is threadedly connected with the feed end 313, and the three-proof paint in the syringe 32 flows into the feed end 313 of the brush 31 through the injection end 321. The syringe 32 passes through the first opening of the first fixing part 331 and the second opening of the second fixing part 333, and the syringe 32 can be firmly clamped in combination with the first opening and the second opening, thereby achieving the fixation of the syringe 32.

[0048] Example 3

[0049] like Figure 1 and Figure 3 As shown, a conformal coating device provided in this embodiment includes a control platform 1, the control platform 1 is connected to a cantilever 2, and the bottom end of the cantilever 2 is connected to a coating structure 3; the coating structure 3 includes a brush 31 arranged near the control platform 1, and the brush 31 is used to apply conformal coating to the circuit board to be processed placed on the control platform 1.

[0050] The triple-conformal paint coating device also includes an air pressure controller 4, the output end of the air pressure controller 4 is connected to an air supply pipe 5, the end of the air supply pipe 5 away from the air pressure controller 4 is connected to the syringe 32, and the input end of the air pressure controller 4 is connected to the control platform 1.

[0051] like Figure 3-Figure 5 As shown, the other end of the syringe 32 opposite to the injection end 321 is provided with a cylinder cover 322, and an air inlet hole is opened on the cylinder cover 322. The output end of the air pressure controller 4 is connected to the air inlet end of the gas pipe 5, and the gas outlet end of the gas pipe 5 is connected to the air inlet hole of the cylinder cover 322. The control platform 1 controls the air pressure controller 4 to input gas into the gas pipe 5, and the gas enters the syringe 32 through the gas pipe 5 and the cylinder cover 322, so that the air pressure in the syringe 32 increases. The control platform 1 controls the air pressure controller 4 to extract gas from the gas pipe 5, and the gas in the syringe 32 enters the air pressure controller 4 through the cylinder cover 322 and the gas pipe 5, so that the air pressure in the syringe 32 decreases.

[0052] Increasing the air pressure in the syringe 32 can increase the conformal coating on the brush head 312, thereby increasing the amount of conformal coating applied; decreasing the air pressure in the syringe 32 can reduce the conformal coating on the brush head 312, thereby reducing the amount of conformal coating applied. The air pressure in the syringe 32 is adjusted by the air pressure controller 4 to control the amount of conformal coating applied.

[0053] like Figure 1 and Figure 6 As shown, a loading platform 6 is provided at one end of the control platform 1 close to the cantilever 2. The loading platform 6 is provided with a fixing member 61 for fixing the circuit board to be processed. The fixing member 61 is provided with a screw hole, and the position of the loading platform 6 is adjustable.

[0054] The loading platform 6 can be pulled along the Figure 2 The cantilever 2 can move forward and backward in the Y direction, and the base 11 remains fixed. Figure 2 The fixing device 33 can move left and right in the X direction. Figure 2 The Z direction in FIG. 2 is moved up and down, thereby adjusting the position of the fixing device 33 installed on the cantilever 2.

[0055] In this embodiment, the loading platform 6 includes two honeycomb plates 62, each of which has a size of 300*250 mm, and four fixing members 61 are provided on each honeycomb plate 62. The loading platform 6 can be moved. If one honeycomb plate 62 is in the painting operation, the other honeycomb plate 62 can be loaded with products. By providing two honeycomb plates 62, the two honeycomb plates 62 can be used alternately. The four fixing members 61 are all provided with screw holes. The screw holes at the four corners of the circuit board to be processed are respectively aligned with the screw holes of the corresponding fixing members 61, and the four screws are respectively inserted into the corresponding screw holes, so that the circuit board to be processed is fixed on the loading platform 6. Preferably, all the fixing members 61 are arranged close to the edge of the honeycomb plate 62.

[0056] like Figure 2 As shown, the control platform 1 includes a base 11 and a bracket 12, the bracket 12 includes a support portion 121 and a guide rail 122; the guide rail 122 is connected to the support portion 121, the support portion 121 is connected to the base 11, and the cantilever 2 is slidably connected to the guide rail 122.

[0057] In this embodiment, the bracket 12 of the control platform 1 is taken as a gantry bracket 12, and the first ends of the two support parts 121 are connected to the base 11, and the second ends of the two support parts 121 are connected to the guide rail 122. The cantilever 2 can slide along the direction of the guide rail 122, so as to adjust the relative position between the brush 31 and the circuit board to be processed.

[0058] The fixing device 33 is detachably connected to the bottom end of the cantilever 2. A screw hole is provided at the bottom end of the cantilever 2, and a screw hole adapted to the bottom end of the cantilever 2 is provided at the connecting portion 332. The screw is inserted into the screw hole at the bottom end of the cantilever 2 and the screw hole of the connecting portion 332, thereby fixing the fixing device 33 to the bottom end of the cantilever 2.

[0059] Screening the coating path of the conformal coating includes: selecting a starting point and an end point in the coating area, selecting multiple intermediate points between the starting point and the end point, and screening the coating path of the conformal coating from multiple paths with the longest total path length and the least number of intermediate points as constraints.

[0060] The control platform 1 of this embodiment is provided with a loading platform 6 at one end close to the cantilever 2, and the loading platform 6 includes a plurality of honeycomb plates 62, each of which is provided with a fixing member 61 for fixing the circuit board to be processed, and the fixing member 61 is provided with a screw hole, and the position of the loading platform 6 is adjustable. The screw holes at the four corners of the circuit board to be processed are aligned with the screw holes of the four fixing members 61, and four screws are respectively inserted into the corresponding screw holes, so that the circuit board to be processed is fixed on the loading platform 6.

[0061] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

[0062] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0065] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A conformal coating device, characterized in that: The control platform comprises a cantilever connected to the control platform, and a painting structure is connected to the bottom end of the cantilever; the painting structure comprises a brush arranged near the control platform, and the brush is used to apply conformal paint to the circuit board to be processed placed on the control platform; The brush comprises a first pipe, and two ends of the first pipe are oppositely provided with a brush head and a feeding end; The painting structure further comprises a syringe and a fixing device, the syringe is fixed to the fixing device, and the injection end of the syringe is threadedly connected to the feeding end; The fixing device comprises a connecting portion, and a first fixing portion and a second fixing portion are respectively provided at two ends of the connecting portion; the first fixing portion is provided with a first opening, and the second fixing portion is provided with a second opening.

2. The conformal coating device according to claim 1, characterized in that: One end of the syringe away from the control platform passes through the first opening, and the injection end of the syringe passes through the second opening.

3. The conformal coating device according to claim 1, characterized in that: The injection end gradually narrows in a direction approaching the feeding end.

4. The conformal coating device according to claim 1, characterized in that: It also includes an air pressure controller, the output end of which is connected to an air supply pipe, one end of the air supply pipe away from the air pressure controller is connected to the syringe, and the input end of the air pressure controller is connected to the control platform.

5. The conformal coating device according to claim 1, characterized in that: A loading platform is arranged at one end of the control platform close to the cantilever, and the loading platform is provided with a fixing piece for fixing the circuit board to be processed, the fixing piece is provided with a screw hole, and the position of the loading platform is adjustable.

6. The conformal coating device according to claim 1, characterized in that: The control platform comprises a base and a bracket, the bracket comprises a support part and a guide rail; the guide rail is connected to the support part, the support part is connected to the base, and the cantilever is slidably connected to the guide rail.

7. The conformal coating device according to claim 1, characterized in that: The fixing device is detachably connected to the bottom end of the cantilever.

Images