A paint uniformity spraying device

Abstract

This utility model belongs to the field of new material manufacturing technology, and specifically relates to a coating uniform spraying device. The device is a housing, inside which is housed a pneumatic spray gun for spraying coating. The housing also contains a clamping assembly for holding the honeycomb panel, and a blowing device for blowing air. The blowing direction of the blowing device is opposite to the direction of the coating sprayed by the pneumatic spray gun. The housing has exhaust holes. Compared to existing technologies, this utility model, by incorporating a blowing device, solves the technical problem in existing technologies where, even with sufficient air pressure in the pneumatic spray gun, the coating easily passes through the honeycomb holes of the aramid honeycomb panel, leading to uneven spraying.

Description

Technical Field

[0001] This utility model belongs to the field of new material manufacturing technology, and specifically relates to a coating uniform spraying device. Background Technology

[0002] Military-grade aramid honeycomb panels are honeycomb-structured composite materials made from aramid fibers. They are widely used in aerospace, military equipment, and other fields due to their lightweight, high strength, impact resistance, high temperature resistance, and excellent fatigue resistance. The typical structure of this panel is a honeycomb porous mesh. This unique structure allows for weight reduction while maintaining high structural strength, but it also presents unique challenges to surface treatment processes.

[0003] In military applications, to impart functionalities such as electromagnetic shielding, corrosion resistance, and thermal protection to aramid honeycomb panels, specific functional coatings need to be sprayed onto their surface. Taking water-based coatings containing chopped carbon fibers as an example, these coatings are often used to prepare honeycomb panel components with electromagnetic compatibility due to the conductive properties of carbon fibers. However, such coatings face multiple technical challenges during spraying, such as the insufficient natural wettability of chopped carbon fibers in water-based coating systems. Even with initial uniform dispersion achieved through stirring, carbon fibers will still rapidly precipitate to the coating surface due to density differences and surface energy characteristics, resulting in uneven composition of the sprayed material. To ensure the smooth spraying of carbon fiber-containing coatings, existing processes typically employ large-diameter spray guns combined with high-pressure spraying. However, this method introduces the following problems:

[0004] Driven by high air pressure, the paint droplets have greater kinetic energy and can easily pass through the honeycomb holes of the aramid honeycomb panel, directly spraying onto the back of the panel. This makes it difficult for the paint to adhere to the inner side of the honeycomb wall, resulting in insufficient paint adhesion inside the honeycomb holes. This forces the experimenters to spray the panel repeatedly, which not only prolongs the process cycle but also makes it difficult to ensure the uniformity of the coating thickness. Furthermore, a large amount of paint is lost due to penetrating the honeycomb holes. According to experimental statistics, the paint utilization rate of the traditional spraying method is less than 50%, resulting in a significant increase in costs. Utility Model Content

[0005] The present invention aims to provide a uniform coating spraying device, which is mainly used to solve the technical problem in the prior art that, under the premise of ensuring that the pneumatic spray gun has sufficient air pressure, the coating can easily pass through the honeycomb holes of the aramid honeycomb board, resulting in uneven spraying.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A uniform coating spraying device is provided. The device is a housing. Inside the housing, there is a pneumatic spray gun for spraying coating. Inside the housing, there is also a clamping assembly for holding a honeycomb panel. Inside the housing, there is also a blowing device for blowing air. The blowing direction of the blowing device is opposite to the direction of the coating sprayed by the pneumatic spray gun. The housing has an exhaust hole.

[0008] Preferably, the clamping assembly includes a base plate with two symmetrical T-slots. A first clamping plate is fixedly mounted on the base plate, and a second clamping plate is slidably mounted within the T-slots. The upper end of the second clamping plate extends out of the T-slots. A screw is fixed to the side of the first clamping plate facing the second clamping plate, and the length direction of the screw is parallel to the length direction of the T-slots. A through hole for cooperating with the screw is provided in the middle of the second clamping plate, and a nut is threadedly connected to the end of the screw on the side of the second clamping plate opposite to the first clamping plate.

[0009] Preferably, the blowing device includes a fan, the air outlet of the fan is connected to a bend, the end of the bend away from the fan is connected to a hood, and the end of the hood away from the bend is connected to the housing and connects the ventilation hood to the internal space of the housing.

[0010] Preferably, the diameter of the wind shroud gradually increases from the end furthest from the housing to the end closest to the housing, and the end of the wind shroud closest to the housing is covered with a diverter plate, and the diverter plate has a plurality of ventilation holes.

[0011] Preferably, the size of the ventilation holes gradually increases from the center of the diverter plate to the surrounding area.

[0012] Preferably, the housing has an opening on the side away from the wind shield, and a door panel is provided at the opening of the housing. An operating opening is provided on the door panel, and a glove is fixed at the operating opening of the door panel facing the inside of the housing.

[0013] Preferably, the door panel has a through hole for the air supply pipe of the pneumatic spray gun to pass through.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this scheme, the experimenter first clamps the honeycomb panel to be sprayed onto the clamping assembly and then sprays the coating onto the honeycomb panel by operating the pneumatic spray gun. During the spraying process, the pneumatic spray gun is ensured to have sufficient spray pressure so that the short carbon fibers can be sprayed together with the coating. At the same time, the blower blows air in the opposite direction so that the coating passing through the honeycomb holes falls onto the surface of the honeycomb panel, thereby making the coating coverage of the honeycomb panel and the honeycomb holes on the honeycomb panel higher.

[0016] 2. During the operation, the experimenter first opens the door panel, clamps the honeycomb panel, closes the door panel, and then sprays the honeycomb panel inside the shell through the gloves on the door panel.

[0017] 3. The fan hood can diffuse and reduce the wind speed emitted by the fan to a more moderate level. Through the arrangement of the ventilation holes (the central holes have higher wind resistance, while the surrounding holes have lower wind resistance), the wind blown out from the center is almost evenly distributed to all ventilation holes. On the one hand, this increases the wind-receiving area of ​​the honeycomb panel, and on the other hand, it can prevent the paint from being blown out of the honeycomb holes due to excessively high local wind pressure, which would result in uneven spraying.

[0018] 4. During use, the clamping device is first removed from the nut, and the distance between the second clamping plate and the first clamping plate is separated until the honeycomb plate can be accommodated. Then, the honeycomb plate is placed in the middle of the two clamping plates, so that the honeycomb plate is placed on the two screws. The honeycomb plate is clamped by the second clamping plate and the first clamping plate. Then, the nut is screwed on to fix the position of the second clamping plate. This completes the clamping of the honeycomb plate. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a three-dimensional structural diagram of a coating uniform spraying device according to this utility model patent;

[0021] Figure 2 This is a partial exploded view of a coating uniform spraying device according to this utility model patent;

[0022] Figure 3 This is an internal structural diagram of a coating uniform spraying device according to this utility model patent;

[0023] Figure 4 This is an internal structural diagram (excluding the honeycomb panel) of a coating uniform spraying device according to this utility model patent.

[0024] Figure 5 This utility model patent relates to a coating uniform spraying device. Figure 4 A magnified view of point A;

[0025] Figure 6 This is a three-dimensional structural diagram of the blowing device of a coating uniform spraying device according to this utility model patent.

[0026] The reference numerals in the accompanying drawings include: housing 1, exhaust vent 11, door panel 2, glove 21, threading hole 22, base plate 3, T-slot 31, first clamping plate 41, second clamping plate 42, screw 43, nut 44, honeycomb plate 5, fan 61, bend 62, fan cover 63, diverter plate 64, and ventilation hole 641. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0031] Example 1:

[0032] like Figure 1As shown, a uniform coating spraying device includes a housing 1. Inside the housing 1 is a pneumatic spray gun for spraying coating. Inside the housing 1 is also a clamping assembly for clamping a honeycomb panel 5. Inside the housing 1 is also a blowing device for blowing air. The blowing direction of the blowing device is opposite to the direction of the coating sprayed by the pneumatic spray gun. The housing 1 has an exhaust hole 11.

[0033] In use, the experimenter first clamps the honeycomb panel 5 to be sprayed onto the clamping assembly and then operates the pneumatic spray gun to spray the paint onto the honeycomb panel 5. During the spraying process, the blowing device blows air in the opposite direction, causing the paint that passes through the honeycomb holes of the honeycomb panel 5 to fall onto the surface of the honeycomb panel 5 in the opposite direction, thereby making the spray coverage of the honeycomb panel 5 and the surface of the honeycomb holes on the honeycomb panel 5 higher.

[0034] like Figure 3 , 4 As shown in Figure 5, the clamping assembly includes a base plate 3, on which two symmetrical TT-shaped grooves 31 are formed. A first clamping plate 41 is fixedly disposed on the base plate 3. A second clamping plate 42 is slidably disposed within the TT-shaped grooves 31. The upper end of the second clamping plate 42 extends out of the TT-shaped grooves 31. A screw 43 is fixed on the side of the first clamping plate 41 facing the second clamping plate 42. The length direction of the screw 43 is parallel to the length direction of the TT-shaped grooves 31. A through hole is formed in the middle of the second clamping plate 42 to cooperate with the screw 43. A nut 44 is threadedly connected to the end of the screw 43 on the side of the second clamping plate 42 opposite to the first clamping plate 41.

[0035] During use, the clamping device is first unscrewed, and the distance between the second clamping plate 42 and the first clamping plate 41 is separated until the honeycomb plate 5 can be accommodated. Then, the honeycomb plate 5 is placed in the middle of the two clamping plates, so that the honeycomb plate 5 is placed on the two screws 43. The honeycomb plate 5 is clamped by the second clamping plate 42 and the first clamping plate 41. Then, the nut 44 is screwed on to fix the position of the second clamping plate 42, thus completing the clamping of the honeycomb plate 5.

[0036] like Figure 1 , Figure 6 As shown, the blowing device includes a fan 61, the outlet of which is connected to a bend 62. The end of the bend 62 away from the fan 61 is connected to a hood 63. The end of the hood 63 away from the bend 62 is connected to the housing 1, linking the hood 63 to the interior space of the housing 1. During the spraying process, paint may enter the hood 63, but because the bend 62 is not a straight pipe, the paint will only fall onto the inner walls of the hood 63 and the bend 62, and will not enter the fan 61 and damage it.

[0037] The diameter of the wind hood 63 gradually increases from the end furthest from the housing 1 to the end closest to the housing 1. A diverter plate 64 covers the end of the wind hood 63 closest to the housing 1. The diverter plate 64 has several ventilation holes 641, the size of which gradually increases from the center outwards. The wind hood 63 diffuses and reduces the airflow from the fan 61 to a gentler speed. The arrangement of the ventilation holes 641 (with higher air resistance in the center and lower air resistance in the surrounding holes) ensures that the concentrated airflow from the center is almost evenly distributed to all ventilation holes 641. This increases the airflow area of ​​the honeycomb panel 5 and prevents excessively high local wind pressure from causing paint to be blown out of the honeycomb holes before it passes through, resulting in uneven spraying.

[0038] like Figure 2 As shown, the housing 1 has an opening on the side away from the wind cover 63, and a door panel 2 is provided at the opening of the housing 1. An operation port is provided on the door panel 2. A glove 21 is fixed on the door panel 2 facing the inside of the housing 1 at the operation port. A threading hole 22 is provided on the door panel 2 for the air source pipe of the pneumatic spray gun to pass through.

[0039] During the operation, the experimenter first opened the door panel 2, clamped the honeycomb panel 5, closed the door panel 2, and then sprayed the honeycomb panel 5 inside the shell 1 through the glove 21 on the door panel 2.

[0040] As can be seen from the above, the technical principle of this utility model is as follows:

[0041] In use, first pass the air supply pipe of the pneumatic spray gun through the wire hole 22, and then assemble it with the internal pneumatic spray gun. Then use the clamping assembly to clamp the honeycomb panel 5 to be tested. During the use of the clamping device, first remove the nut 44, separate the distance between the second clamping plate 42 and the first clamping plate 41 until the honeycomb panel 5 can be accommodated, and then place the honeycomb panel 5 in the middle of the two clamping plates so that the honeycomb panel 5 is placed on the two screws 43. Use the second clamping plate 42 and the first clamping plate 41 to clamp the honeycomb panel 5, and then screw on the nut 44 to fix the position of the second clamping plate 42. This completes the clamping of the honeycomb panel 5.

[0042] After assembling the honeycomb panel 5, close the door panel 2, start the air source, and then turn on the fan 61. At this time, the experimenter can spray the honeycomb panel 5. During the spraying process, the paint passing through the honeycomb panel 5 will be returned by the wind and fall onto the surface of the honeycomb panel 5, so that the spraying process does not require adjustment of the initial spray pressure of the spray gun, which improves the uniformity of the honeycomb panel 5 spraying.

[0043] Example 2:

[0044] Unlike Embodiment 1, the fan shroud 63 of the blower 61 is positioned at the top of the housing 1, while the base plate 3 of the clamping device is positioned on the side wall of the housing 1. When the clamping device clamps the honeycomb panel 5, the surface of the honeycomb panel 5 is perpendicular to the blowing direction. During the experiment, the coating is sprayed from below the honeycomb panel 5 upwards. The coating passing through the honeycomb holes will not be directly sprayed onto the top wall of the housing 1 under the action of the wind, but will fall back onto the surface of the honeycomb panel 5 under the combined action of wind and gravity. Compared with the implementation method of Embodiment 1, the amount of coating falling back onto the surface of the honeycomb panel 5 in the implementation of Embodiment 2 is greater, thus saving more coating.

[0045] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A device for uniformly spraying paint, characterized in that, The device is a housing, inside which is a pneumatic spray gun for spraying paint, a clamping assembly for holding honeycomb panels, and a blowing device for blowing air. The blowing direction of the blowing device is opposite to the direction of the paint spraying by the pneumatic spray gun, and an exhaust hole is provided on the housing.

2. The coating uniform spraying device according to claim 1, characterized in that, The clamping assembly includes a base plate with two symmetrical T-slots. A first clamping plate is fixedly mounted on the base plate, and a second clamping plate is slidably mounted within the T-slots. The upper end of the second clamping plate extends out of the T-slots. A screw is fixed to the side of the first clamping plate facing the second clamping plate, and the length direction of the screw is parallel to the length direction of the T-slots. A through hole for cooperating with the screw is provided in the middle of the second clamping plate, and a nut is threadedly connected to the end of the screw on the side of the second clamping plate opposite to the first clamping plate.

3. The coating uniform spraying device according to claim 2, characterized in that, The blowing device includes a fan, the air outlet of the fan is connected to a bend, the end of the bend away from the fan is connected to a hood, and the end of the hood away from the bend is connected to the housing and connects the ventilation hood to the internal space of the housing.

4. The coating uniform spraying device according to claim 3, characterized in that, The diameter of the wind shroud gradually increases from the end furthest from the housing to the end closest to the housing. The end of the wind shroud closest to the housing is covered with a diverter plate, and the diverter plate has several ventilation holes.

5. The coating uniform spraying device according to claim 4, characterized in that, The size of the ventilation holes gradually increases from the center of the diffuser plate outwards.

6. The coating uniform spraying device according to claim 5, characterized in that, The housing has an opening on the side away from the wind shield, and a door panel is provided at the opening of the housing. An operating port is provided on the door panel, and a glove is fixed at the operating port facing the inside of the housing.

7. The coating uniform spraying device according to claim 6, characterized in that, The door panel has a through hole for the air supply pipe of the pneumatic spray gun to pass through.

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