CN215784213U

CN215784213U - PCB spraying device

Info

Publication number: CN215784213U
Application number: CN202122319310.8U
Authority: CN
Inventors: 张明红; 宋明岑; 马徐武
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-02-11
Anticipated expiration: 2031-09-24

Abstract

The utility model discloses a PCB spraying device, which comprises a feed pipe and a spraying assembly, wherein the feed pipe is communicated with the spraying assembly, and the feed pipe enables a coating to enter the spraying assembly; the spraying assembly is provided with a spraying opening, the spraying opening faces the PCB, and the spraying opening atomizes and sprays the coating on the surface of the PCB. The PCB spraying device disclosed by the utility model adopts an atomization mode to spray so as to enable the boundary spraying effect to be neat, the whole part can be covered at the peripheral boundary of a sprayed object, the accurate and error-free spraying position is effectively achieved, the effects of protecting the surface insulation, preventing dust, static electricity and rustiness of a product are achieved, and the service life of an electronic component is prolonged.

Description

PCB spraying device

Technical Field

The utility model belongs to the field of PCB manufacturing, and particularly relates to a PCB spraying device.

Background

At present, the solder-resisting low-pressure spraying line of the PCB (printed circuit board) is widely applied to the production of the PCB.

The spraying protection mode of the PCB in the market is that glue or paint is sprayed on the surface of a product in a water curtain shape, and the glue and the paint are sprayed on the surface of the PCB in the water curtain shape through a spray head to form a protection layer and protect the surface of the PCB from corrosion.

However, the water curtain-like spraying mode leaves glue threads and glue dots on the product to be sprayed on two sides, which affects the use of the needle stand, the receiver and other electronic elements. The effect of the coating boundary is irregular, and there may be portions that cannot be covered by the coating at the peripheral boundary of the object to be coated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a PCB spraying device, which aims to solve the technical problem of poor spraying effect in the background technology.

In order to achieve the purpose, the specific technical scheme of the PCB spraying device is as follows:

a PCB spraying device comprises a feed pipe and a spraying assembly, wherein the feed pipe is communicated with the spraying assembly, and the feed pipe enables coating to enter the spraying assembly; the spraying assembly is provided with a spraying opening, the spraying opening faces the PCB, and the spraying opening atomizes and sprays the coating on the surface of the PCB.

Further, the spray assembly is provided with a paint flow passage having a tip end communicating with the spray opening and an air flow passage connected to the tip end of the spray opening to atomize the paint at the tip end of the spray opening by the bernoulli effect.

Furthermore, a feed inlet is formed in the side face of the spraying assembly, one end of the feed inlet is connected with the feed pipe, and the other end of the feed inlet is connected with the coating flow channel.

Furthermore, the side surface of the spraying component is provided with an air inlet, and the tail end of the air inlet is provided with a connecting channel communicated to the airflow channel.

Furthermore, the spraying assembly comprises a second valve body and a third valve body which are fixed with each other, the feed inlet is arranged on the third valve body, and the air inlet is arranged on the second valve body.

Furthermore, the spraying assembly comprises a first valve body and a second valve body which are fixed with each other, the second valve body is provided with an inner rod, the first valve body is provided with a jacket, and the jacket is sleeved on the outer side of the inner rod so as to form an air flow channel between the jacket and the inner rod.

Further, a valve needle is arranged in the coating material flow passage, the tip end of the valve needle can block the injection opening, and the valve needle is moved to adjust the opening and closing amount of the injection opening.

Further, the spraying assembly is provided with a through hole for inserting the valve needle, a plug is arranged in the through hole, and the plug is sleeved outside the valve needle to seal a gap between the through hole and the valve needle.

Furthermore, the diameter of the jet orifice is smaller than that of the coating flow channel, and the tail end of the coating flow channel is connected with the jet orifice through a funnel-shaped connecting cavity.

Furthermore, the tail end of the spray opening is communicated with a spray opening, and the atomized coating and air are sprayed out from the spray opening.

The PCB spraying device of the utility model has the following advantages: through increase spraying device in spouting gluey and paint spraying equipment, adopt the spraying of atomizing mode to make the spraying effect of boundary neat, border department can reach and cover whole part around being sprayed the object, effectively plays the local accuracy of needs spraying and does not have the mistake, plays protection product surface insulation, dustproof, prevent static, prevent the rust effect, protects electronic components's life.

Drawings

FIG. 1 is a schematic structural diagram of a PCB spraying apparatus of the present invention;

FIG. 2 is a cross-sectional view of a PCB spraying apparatus of the present invention;

fig. 3 is an enlarged view of a portion a of fig. 2.

The notation in the figure is:

1. a first valve body; 11. a jacket; 12. a spray nozzle; 2. a second valve body; 21. an inner rod; 22. an air inlet; 23. a connecting channel; 3. a third valve body; 31. a feed inlet; 4. a coating flow channel; 41. a connecting cavity; 5. an air flow channel; 51. a necking part; 6. an ejection port; 7. a valve needle; 8. and (7) a plug.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, a PCB spraying apparatus of the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the PCB spraying apparatus of the present invention includes a feeding pipe and a spraying assembly, the feeding pipe is communicated with the spraying assembly, the feeding pipe enables the coating to enter the spraying assembly, and the spraying assembly atomizes and sprays the coating on the surface of the PCB. Thus, the liquid distributor for generating the water curtain in the prior art is replaced by the spraying assembly. Correspondingly, the spraying mode is changed from water curtain coating to spray coating, so that the coating is uniform and the edge is neat.

The spray assembly may be of different kinds, depending on the situation, such as bernoulli's principle, impact barrier, centrifugal separation, ultrasonic atomization, etc. Since the coating of the PCB is primarily paint and glue, it is preferred to atomize the relatively low velocity liquid coating by high velocity air flow using the bernoulli principle.

Referring to fig. 2 and 3, the spray assembly is composed of an upper valve body, a middle valve body and a lower valve body, namely a first valve body 1, a second valve body 2 and a third valve body 3 which are connected in sequence. The three valve bodies are coaxially arranged and are fixedly connected in sequence.

Specifically, a first projection and a second projection are respectively formed at two ends of the second valve body 2, a socket for the first projection to be inserted is formed on the first valve body 1, a notch for the second projection to be inserted is formed on the third valve body 3, and therefore the first valve body 1, the second valve body 2 and the third valve body 3 are fixedly connected with each other through interference fit of the opening and the block.

For the flow of the coating material, the spray assembly is provided with a coating material flow channel 4. Specifically, the second valve body 2 and the third valve body 3 are provided with center holes, respectively. Because the valve body sets up coaxially for the centre bore of first valve body 1 and second valve body 2 communicates each other, so as to be formed with coating flow channel 4. The third valve body 3 is provided with a feed inlet 31 at the side, and the feed inlet 31 is arranged along the radial direction and connected with the coating material flow passage 4. The end of the paint flow passage 4 is formed with a spray port 6, and the spray port 6 faces the PCB. So that the coating material flows along the coating material flow path 4 and is atomized from the spray opening 12 and sprayed on the surface of the PCB by being mounted on the feed opening 31 through the feed pipe.

For the gas flow, the spray assembly is provided with a gas flow channel 5. Specifically, the inner rod 21 is formed on the first bump of the second valve body 2, the outer sleeve 11 is formed on the inner side of the socket of the first valve body 1, and the outer sleeve 11 is sleeved on the outer side of the inner rod 21, so that the air flow channel 5 is formed between the outer sleeve 11 and the inner rod 21. And the portion of the second valve body 2 located outside the first valve body 1 is formed with an intake port 22, the intake port 22 being disposed in the radial direction and having a connection passage 23 formed at the tip, the connection passage 23 extending axially into the annular air flow passage 5, the air flow passage 5 being connected to the tip of the ejection port 6. Thus, the air outlet pipe of the air pump is installed on the air inlet 22, the air flow channel 5 is exhausted, the coating flowing at low speed moves to the air flowing at high speed, so that the coating is dispersed in a drop shape, and atomization is realized.

In order to secure the ejection distance, the diameter of the ejection opening 6 is smaller than that of the paint flow path 4, and the tip of the paint flow path 4 is connected to the ejection opening 6 through a funnel-shaped connection chamber 41. And the end of the air flow channel 5 is formed with a necking part 51, the caliber of the necking part 51 is gradually reduced along with the distance from the air flow channel 5, and the end of the necking part 51 is connected with the end of the jet orifice 6. Therefore, the flow speed is improved by reducing the caliber, and farther jetting is obtained.

The first valve body 1 forms a spray opening 12 communicated with the spray opening 6, and the spray opening 12 is used for spraying atomized paint and air, so that the influence of external air flow on the atomization process at the tail end of the spray opening 6 is prevented.

And the feed inlet 31 and the air inlet 22 are respectively positioned on the third valve body 3 and the second valve body 2, namely the feed inlet 31 is positioned on one axial side of the air inlet 22, which is not only convenient for the arrangement of the valve bodies, but also convenient for the arrangement of external pipelines.

In order to control the thickness of the paint, a needle 7 is provided in the paint passage 4, and the tip of the needle 7 may block the injection port 6 to adjust the opening and closing amount of the injection port 6 by moving the needle 7, thereby adjusting the flow rate of the paint. The third valve body 3 is provided with a through hole for inserting the valve needle 7, and a plug 8 sleeved outside the valve needle 7 is arranged in the through hole to seal a gap between the third valve body 3 and the valve needle 7.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. A PCB spraying device is characterized by comprising a feeding pipe and a spraying assembly, wherein the feeding pipe is communicated with the spraying assembly, and paint enters the spraying assembly through the feeding pipe; the spraying assembly is provided with a spraying opening, and the spraying opening faces the PCB so as to atomize and spray the coating on the surface of the PCB.

2. The PCB spraying apparatus of claim 1, wherein the spraying assembly is provided with a coating material flow path having a tip end communicating with the spraying port and an air flow path connected to the tip end of the spraying port to atomize the coating material at the tip end of the spraying port by bernoulli effect.

3. The PCB spraying device of claim 2, wherein the spraying component is provided with a feed inlet at the side, one end of the feed inlet is connected with the feed pipe, and the other end of the feed inlet is connected with the coating material flow passage.

4. The PCB spraying apparatus of claim 3, wherein the spraying assembly is provided with an air inlet at a side thereof, and a connection passage is formed at a tip of the air inlet and is connected to the air flow passage.

5. The PCB spraying device of claim 4, wherein the spraying assembly comprises a second valve body and a third valve body which are fixed with each other, the feeding port is arranged on the third valve body, and the air inlet is arranged on the second valve body.

6. The PCB spraying apparatus of claim 2, wherein the spraying assembly comprises a first valve body and a second valve body fixed to each other, the second valve body is formed with an inner rod, the first valve body is formed with an outer sleeve, the outer sleeve is fitted over the outer side of the inner rod to form an air flow passage between the outer sleeve and the inner rod.

7. The PCB spraying apparatus of claim 2, wherein a valve needle is disposed in the coating material flow path, and a tip end of the valve needle blocks the spraying port; the valve needle is moved to adjust the opening and closing amount of the injection port.

8. The PCB spraying device of claim 7, wherein the spraying assembly is provided with a through hole for inserting the valve needle, a plug is arranged in the through hole, and the plug is sleeved outside the valve needle to seal a gap between the through hole and the valve needle.

9. The PCB spraying apparatus of claim 2, wherein the diameter of the spraying port is smaller than that of the paint flow passage, and the end of the paint flow passage is connected to the spraying port through a funnel-shaped connection cavity.

10. The PCB spraying device of claim 1, wherein the end of the spraying opening is communicated with a spraying opening for spraying atomized paint and air.