Universal air-mixing wax spray gun nozzle for automobile painting

Abstract

The utility model relates to the field of automobile coating technology, specifically disclose a general mixed gas wax spraying gun nozzle for automobile coating, including nozzle and wax delivery pipeline, the nozzle's spray end outer periphery is equipped with at least two annular slits, annular slit is along nozzle circumferential interval arrangement and is linked with wax delivery pipeline, all annular slits are on the same circumference of nozzle, and the sum of all annular slits along nozzle circumferential extension angle is 320 to 360. The present scheme is used to solve the problem of low production efficiency and uneven wax film caused by the fixed position of the spray hole, poor universality and easy blockage of the existing wax spraying gun nozzle.

Description

Technical Field

[0001] This utility model relates to the field of automotive coating technology, specifically to a universal mixed-air wax spray nozzle for automotive coating. Background Technology

[0002] To enhance the corrosion resistance of car bodies, modern automobiles commonly employ a mixed-air wax spraying process for the car body cavities. Current wax spraying for car body cavities requires a mixed-air wax spray gun to supply the mixed-air wax, which is then sprayed from the nozzle onto the areas of the car body requiring waxing. Because different car models have different body shapes, this method necessitates the use of nozzles with different orientations or numbers of spray holes for different body types. For example, if the waxing location is at the top of the car body cavity, the spray holes on the nozzle will be positioned at the top outer periphery of the nozzle; if it's at the bottom of the cavity, the spray holes will be positioned at the bottom outer periphery of the nozzle. Furthermore, to achieve accurate wax spraying, nozzle positioning is often necessary. This necessitates both different nozzle designs based on the waxing requirements of different car body cavities and the use of limiting blocks that align with the corresponding areas of the car body structure. The accuracy of the spray direction is ensured through the coordination of these limiting blocks with the car body shape.

[0003] This method, exemplified by the technology in patent publication number CN216025630U, "Automotive Body Inner Cavity Anti-corrosion Wax Injection Gun Nozzle," involves multiple spray holes on the nozzle end plate. The number of spray holes is primarily determined by the desired spraying location, with a diameter of approximately 1 mm. The nozzle is equipped with a limiting structure featuring a limiting seat and a limiting block. This limiting structure needs to be designed based on the shape and profile of the body holes in the area to be sprayed. However, this current method has the following problems: First, the body structures of different car models vary greatly, and the waxing processes in different areas also differ. This means that the waxing station needs to frequently change different types of nozzles to adapt to the changes. The nozzles have poor versatility, and the replacement process reduces production efficiency.

[0004] Secondly, the nozzles of wax spray guns are mostly small-hole structures, which are prone to clogging, resulting in unstable spray atomization and uneven wax film thickness. Third, because the position of the nozzle is limited, the positioning structure of the existing nozzle needs to be designed in various ways, which makes the versatility of the positioning structure poor. Utility Model Content

[0005] The present invention aims to provide a universal mixed-air wax spray nozzle for automotive painting, in order to solve the problems of low production efficiency and uneven wax film caused by the fixed position of the spray hole, poor versatility and easy clogging of existing wax spray nozzles.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A universal air-fuel spray nozzle for automotive painting includes a nozzle and a wax delivery line. The nozzle has at least two annular slits on the outer periphery of its spray end. The annular slits are spaced apart along the circumference of the nozzle and communicate with the wax delivery line. All the annular slits are on the same circumference of the nozzle, and the sum of the extension angles of all the annular slits along the circumference of the nozzle is 320° to 360°.

[0007] The principle and advantages of this solution are as follows: By setting at least two annular slits on the outer periphery of the nozzle and making all the annular slits together form an annular spray pattern that can approach 360°, a wide range of wax coverage is achieved. This solution can adapt to the waxing needs of different areas inside the vehicle body cavity, and there is no need to change the nozzle for different vehicle models or different waxing positions, thus improving the versatility of the nozzle.

[0008] In addition, while the annular slit can achieve the same wax mist spraying as the nozzle, it can reduce or even avoid the problem of wax clogging in the nozzle, which helps to improve the uniformity of wax spraying and the uniformity of wax film thickness.

[0009] In addition, this solution also solves the problem of spraying in a single direction in complex cavities or curved areas, which leads to excessive wax film buildup in some areas or the easy formation of spraying dead corners.

[0010] Preferably, as an improvement, the number of annular slits is two, so that the angle of the annular spray pattern formed by all the annular slits is closer to 360°.

[0011] Preferably, as an improvement, the annular slit is a narrow slit, and the width of the annular slit is no greater than 0.8 mm.

[0012] Preferably, as an improvement, it also includes a limiting block fixedly connected to the nozzle. The limiting block has a quadrilateral structure, and the side of the limiting block facing the nozzle end is a plane, so as to facilitate the limiting block to directly fit with the surface of the wax injection hole at different positions on the vehicle body, thereby improving versatility.

[0013] Preferably, as an improvement, the wax delivery pipeline includes a flexible hose and quick-connect fittings connected to both ends of the hose. One quick-connect fitting is fixedly connected to and communicates with the nozzle, and the other quick-connect fitting is used to quickly detach from the air-fuel spray gun. The flexible hose in this solution allows for convenient operation even when spraying wax in a confined space.

[0014] Preferably, as an improvement, a hollow handle is connected between the quick-connect fitting near the nozzle and the hose, and the hollow channel of the hollow handle is connected to both the hose and the nozzle.

[0015] Preferably, as an improvement, the hollow handle is made of aluminum alloy, so that the hollow handle has both appropriate strength and relatively low weight, thereby reducing the fatigue intensity of the operator.

[0016] Preferably, as an improvement, the outer peripheral surface of the hollow handle is provided with anti-slip knurling to improve anti-slip performance.

[0017] Preferably, as an improvement, an RFID carrier is installed on the wax delivery pipeline to facilitate quick matching with a mixed-air wax spray gun with an RFID reader / writer head, thereby achieving rapid nozzle identification and coating parameter matching. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model.

[0019] Figure 2 for Figure 1 A three-dimensional structural diagram of the nozzle tip.

[0020] Figure 3 for Figure 2 The main view.

[0021] Figure 4 for Figure 3 AA sectional view.

[0022] The reference numerals in the accompanying drawings include: nozzle 1, annular slit 11, limit block 2, outlet quick connector 3, hollow handle 4, hose 5, RFID carrier 6, and inlet quick connector 7. Detailed Implementation

[0023] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figures 1 to 4 As shown.

[0024] A universal air-fuel spray nozzle for automotive painting includes a nozzle 1 and a wax delivery line fixedly connected to the nozzle 1.

[0025] At least two annular slits 11 are machined on the outer periphery of the nozzle 1. The annular slits 11 are arranged at intervals along the circumference of the nozzle 1 and are connected to the wax delivery pipeline. All annular slits 11 are on the same circumference of the nozzle 1, and the sum of the extension angles of all annular slits 11 along the circumference of the nozzle 1 is 320° to 360°. The annular slits 11 are narrow slits, and the width of the annular slits 11 is not greater than 0.8 mm.

[0026] In this embodiment, there are two annular slits 11, so that the angle of the annular spray pattern formed by all the annular slits 11 is closer to 360°.

[0027] A limiting block 2 is fixed to the nozzle 1 by screws. The limiting block 2 has a quadrilateral structure, and the side of the limiting block 2 facing the end of the nozzle 1 is flat, so that the limiting block 2 can directly fit against the surface of the wax injection hole of the car body. The limiting block 2 is made of nylon.

[0028] The wax delivery pipeline includes an outlet quick-connect coupling 3, a hollow handle 4, a hose 5, and an inlet quick-connect coupling 7, which are connected in sequence. The outlet quick-connect coupling 3 and the inlet quick-connect coupling 7 are the quick-connect couplings connected to both ends of the hose 5. The hollow channel of the hollow handle 4 is connected to both the hose 5 and the nozzle 1. The hollow handle 4 is made of aluminum alloy, and its outer surface is machined with anti-slip knurling.

[0029] An RFID carrier 6 is installed on the quick-connect fitting 7 at the inlet of the wax delivery pipeline to facilitate quick matching with the air-to-gas spray gun with RFID reader / writer head, thereby enabling rapid identification of nozzle 1 and matching of coating parameters.

[0030] In this embodiment, the inlet quick connector 7 of the universal mixed-air wax spray nozzle used for automotive painting is connected to the mixed-air wax spray gun. The wax mist passes sequentially through the inlet quick connector 7, the hose 5, the hollow handle 4, and the outlet quick connector 3, and is finally sprayed out from the annular slit 11 of the nozzle 1.

[0031] In this embodiment, because all the annular seams 11 together form an annular spray pattern that basically covers 360°, a large range of wax spray coverage is achieved, which can adapt to the wax spraying needs of different areas inside the vehicle body cavity. There is no need to change the nozzle 1 for different models or different wax spraying positions, thus improving the versatility of the nozzle 1.

[0032] Although this embodiment causes wax waste in some areas where waxing is not required, the increased versatility of nozzle 1 reduces the time required to replace and adjust nozzle 1 and the limiting structure, thereby improving overall production efficiency. The benefits outweigh the cost of wasting wax.

[0033] In addition, the annular slit 11 can reduce or even avoid the problem of wax blockage in the pinholes, which helps to improve the uniformity of wax spraying and the uniformity of wax film thickness.

[0034] Moreover, because the spray pattern in this embodiment can basically cover 360°, it can still achieve spraying in complex cavities or curved areas and can basically avoid the problem of spraying dead corners.

[0035] In terms of operator control, the hollow handle 4 is made of aluminum alloy, and the flexible hose 5 makes it suitable for waxing in confined spaces, while also reducing operator fatigue.

[0036] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A universal air-fuel spray nozzle for automotive painting, comprising a nozzle and a wax delivery pipeline, characterized in that, The nozzle has at least two annular slits on its outer periphery at the ejection end. The annular slits are arranged at intervals along the circumference of the nozzle and are connected to the wax delivery pipeline. All the annular slits are on the same circumference of the nozzle, and the sum of the extension angles of all the annular slits along the circumference of the nozzle is 320° to 360°.

2. The universal air-mixed wax spray nozzle for automotive painting according to claim 1, characterized in that: The number of annular seams is 2.

3. The universal air-mixed wax spray nozzle for automotive painting according to claim 1, characterized in that: The annular slit is a narrow slit, and the width of the annular slit is no more than 0.8 mm.

4. The universal air-mixed wax spray nozzle for automotive painting according to claim 1, characterized in that: It also includes a limiting block that is fixedly connected to the nozzle. The limiting block has a quadrilateral structure and the side of the limiting block facing the nozzle end is a plane.

5. A universal air-mixed wax spray nozzle for automotive painting according to claim 1, characterized in that: The wax delivery pipeline includes a flexible hose and quick-connect fittings at both ends of the hose. One quick-connect fitting is fixedly connected to and communicates with the nozzle, while the other quick-connect fitting is used for quick assembly and disassembly with the air-fuel spray gun.

6. A universal air-mixed wax spray nozzle for automotive painting according to claim 5, characterized in that: A hollow handle is connected between the quick-connect fitting near the nozzle and the hose. The hollow channel of the hollow handle is connected to both the hose and the nozzle.

7. A universal air-mixed wax spray nozzle for automotive painting according to claim 6, characterized in that: The hollow handle is made of aluminum alloy.

8. A universal air-mixed wax spray nozzle for automotive painting according to claim 6, characterized in that: The outer surface of the hollow handle is provided with anti-slip knurling.

9. A universal air-mixed wax spray nozzle for automotive painting according to claim 1, characterized in that: An RFID carrier is installed on the wax delivery pipeline.

Images