Material needle ventilation structure in coating gun

Abstract

The utility model discloses a material needle ventilation structure in a coating gun, which comprises a gun body, an atomizing nozzle, a material needle component, a trigger and a needle plug, a ventilation channel is arranged in the gun body, and a material cavity is arranged at the end part of the gun body; the gun body is provided with a front positioning assembly and a rear positioning assembly. The material needle assembly comprises a front needle rod and a rear needle rod. One end of the front needle rod is fixedly connected with the needle plug, the other end of the front needle rod is fixedly connected with the rear needle rod, needle rod vent holes which are communicated with one another are formed in the needle plug, the front needle rod and the rear needle rod respectively, the needle rod vent hole in the rear needle rod is communicated with the vent channel in the gun body, a discharging hole is formed in the atomizing nozzle, and the needle rod vent hole corresponds to the discharging hole. The needle rod is of a split type structure installation design and is convenient to produce and machine, the needle rod vent hole corresponds to the discharging direction, high-pressure gas cannot cause discharging interference on paint in the material cavity, the paint is sprayed out more evenly and smoothly, and the spraying effect is improved. The needle plug, the front needle rod and the rear needle rod are of a split structure, so that the nozzle is convenient to replace and use.

Description

Technical Field

[0001] This utility model relates to the field of spray gun technology, specifically to a material needle ventilation structure in a paint gun. Background Technology

[0002] A spray gun is a tool for spraying paint. It uses compressed air to quickly release the paint from the nozzle, and the design between the nozzle and the needle bar is particularly important for the spraying effect.

[0003] In existing spray guns, the needle rod is positioned and connected to the sealing seat via a guide screw, passing through the gun body and linked to the trigger. During spraying, pressing the trigger moves the needle rod, creating a gap between it and the nozzle, while compressed gas opens, drawing the paint from the atomizing cap through the nozzle for atomization. However, the ventilation channels in most existing spray guns are located within the gun body. High-pressure gas passes through the gun body and enters the nozzle. The ventilation channels in existing structures consist of multiple interconnected channels within the gun body, making manufacturing cumbersome and resulting in poor ventilation. Furthermore, this ventilation structure is problematic for the spray gun... The existing structure has many components, and the air intake is from the side of the nozzle, which is inconsistent with the air and material discharge direction. This causes the air to collide and swirl within the nozzle before being ejected, thus affecting the smooth flow of the material. Furthermore, different nozzles are required for different coatings, such as water-in-water, water-in-sand, crystal coatings, and rock flake coatings. Due to the limitations of the existing design, it is not as simple as just replacing the nozzle. Multiple accessories, such as the matching needle plug and the guiding needle rod, also need to be replaced, making the process very complicated. Therefore, it is essential to improve upon the aforementioned defects in the existing structure. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to provide a venting structure for the paint needle in a paint gun.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a venting structure for a paint gun needle, comprising a gun body, an atomizing nozzle, a paint needle assembly, a trigger, and a needle plug; a venting channel controlled by the trigger is provided inside the gun body, and a material chamber is provided at the end of the gun body; characterized in that: a front positioning assembly and a rear positioning assembly are respectively provided on the gun body to connect the paint needle assembly; the paint needle assembly includes a front needle rod and a rear needle rod; the front needle rod is positioned and connected to the gun body through the front positioning assembly, and the rear needle rod is positioned and connected to the gun body through the rear positioning assembly; one end of the front needle rod is fixedly connected to the needle plug, and the other end is fixedly connected to the rear needle rod; the needle plug, the front needle rod, and the rear needle rod are respectively provided with communicating needle rod venting holes; the needle rod venting hole in the rear needle rod communicates with the venting channel inside the gun body; the atomizing nozzle is provided with a discharge hole, and the needle rod venting hole corresponds to the discharge hole.

[0006] In the aforementioned needle ventilation structure of a paint gun, the needle vent and the discharge port are on the same central axis.

[0007] In the above-mentioned paint gun needle ventilation structure, the gun body is provided with a mounting chamber for installing a rear positioning component. The rear positioning component is a needle chamber sleeve, and the rear needle rod passes through the needle chamber sleeve, forming an inner air intake gap between the two. The needle chamber sleeve is fixed in the mounting chamber and forms an outer air intake gap with the mounting chamber. The front needle rod and the rear needle rod are respectively provided with multiple outer air intake holes and inner air intake holes. The ventilation channel, outer air intake gap, outer air intake hole, inner air intake gap, inner air intake hole, and needle rod ventilation hole are interconnected.

[0008] In the above-mentioned needle ventilation structure of a paint gun, a sealing gasket is provided between the needle chamber sleeve and the mounting chamber, and a sealing ring is provided between the needle chamber sleeve and the rear needle rod.

[0009] In the above-mentioned paint gun needle ventilation structure, an air intake adjustment component is installed and connected to the mounting chamber of the gun body, and the air intake adjustment component is connected to the rear needle rod for adjustment and control.

[0010] In the above-mentioned paint gun needle ventilation structure, the front positioning component includes a guide screw seat and a sealing seat. The guide screw seat is screwed and fixed to the gun body, and the front needle rod is connected to the gun body through the guide screw seat and the sealing seat.

[0011] In the above-mentioned paint gun needle ventilation structure, the needle chamber sleeve is provided with an external air inlet groove, and an external air inlet gap is formed between the external air inlet groove and the mounting chamber. The rear needle rod is provided with an internal air inlet groove, and an internal air inlet gap is formed between the rear needle rod and the needle chamber sleeve.

[0012] By adopting the above-described technical solution, this utility model has the following beneficial effects:

[0013] This invention sets the vent hole in the needle bar, which is composed of two parts, making it easy to manufacture. Furthermore, under the premise of a split needle bar, the vent hole of the needle bar is designed to correspond to the direction of material discharge, so that the high-pressure gas will not interfere with the material discharge of the coating in the material chamber, thereby allowing the coating to be sprayed out better, more evenly and smoothly, and improving the spraying effect.

[0014] For water-in-water, water-in-sand, crystal coatings, rock flake coatings, and other types of coatings that require different nozzles, the needle plug, front needle rod, and rear needle rod are designed to be separate, making them very easy to replace. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 2yes Figure 1 Enlarged view of part A;

[0017] Figure 3 yes Figure 1 Enlarged view of part B. Detailed Implementation

[0018] The present invention will be further described in conjunction with the accompanying drawings.

[0019] Please see Figures 1 to 3 This utility model provides a material needle ventilation structure for a paint gun, including a gun body 1, an atomizing nozzle 2, a material needle assembly, a trigger 3, and a needle plug 10. The gun body 1 is provided with a ventilation channel 4 controlled by the trigger 3, and a material chamber 5 is provided at the end of the gun body 1.

[0020] The gun body 1 is respectively provided with a front positioning component 6 and a rear positioning component to connect the needle assembly. The needle assembly includes a front needle rod 8 and a rear needle rod 9. The front needle rod 8 is positioned and connected to the gun body 1 through the front positioning component 6, and the rear needle rod 9 is positioned and connected to the gun body 1 through the rear positioning component. The gun body 1 is provided with a mounting chamber 13 for installing the rear positioning component. The rear positioning component is a needle chamber sleeve 7, which connects the rear needle rod 9 to the gun body. The front positioning component 6 includes a guide screw seat 19 and a sealing seat 20. The guide screw seat 19 is screwed and fixed to the gun body 1. The front needle rod 8 is inserted into the gun body 1 through the cooperation of the guide screw seat 19 and the sealing seat 20. One end of the front needle rod 8 is fixedly connected to the needle plug 10, and the other end is fixedly connected to the rear needle rod 9. Since the needle plug 10, the front needle rod 8, and the rear needle rod 9 adopt a split structure, it is very convenient to replace and use different nozzles required for water-in-water, water-in-sand, crystal coatings, rock flake coatings, etc.

[0021] The needle plug 10, the front needle rod 8, and the rear needle rod 9 are each provided with a communicating needle rod vent hole 11. The needle rod vent hole 11 in the rear needle rod 9 is connected to the venting channel 4 in the gun body 1. Specifically, the rear needle rod 9 passes through the needle chamber sleeve 7, forming an inner air intake gap 14 between the two. The needle chamber sleeve 7 is fixed in the mounting chamber 13, forming an outer air intake gap 25 between it and the mounting chamber 13. The front needle rod 8 and the rear needle rod 9 are respectively provided with multiple outer air intake holes 15 and inner air intake holes 16. The venting channel 4, the outer air intake gap 25, the outer air intake holes 15, the inner air intake gap 14, the inner air intake holes 16, and the needle rod vent hole 11 are connected. The atomizing nozzle 2 is provided with a discharge hole 12. The needle rod vent hole 11 corresponds to the discharge hole 12. Preferably, the needle rod vent hole 11 and the discharge hole 12 are on the same central axis.

[0022] Furthermore, the needle chamber sleeve 7 is provided with an external air inlet groove 21, and an external air inlet gap 25 is formed between the external air inlet groove 21 and the mounting chamber 13 through the external air inlet groove. The rear needle rod 9 is provided with an internal air inlet groove 22, and an internal air inlet gap 14 is formed between the rear needle rod 9 and the needle chamber sleeve 7 through the internal air inlet groove 22.

[0023] The needle bar structure adopts a split design, which facilitates production and processing. At the same time, under the premise of split needle bar, the design of the needle bar vent hole corresponds to the direction of material discharge. The high-pressure gas will not interfere with the material discharge of the coating in the material chamber, so that the coating can be sprayed out better, more evenly and smoothly, and improve the spraying effect.

[0024] Furthermore, in order to ensure the sealing of the connection, a sealing gasket 17 is provided between the needle chamber sleeve 7 and the mounting chamber 13, and a sealing ring 18 is provided between the needle chamber sleeve 7 and the rear needle rod 9.

[0025] Furthermore, to facilitate ventilation adjustment, an air intake adjustment component 26 is installed and connected to the mounting chamber 13 of the gun body 1. The air intake adjustment component 26 is connected to the rear needle rod 9 and is adjusted and controlled.

[0026] The above provides a detailed description of the nozzle ventilation structure in a paint gun according to the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the technical solution disclosed in this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A venting structure for a paint gun needle, comprising a gun body (1), an atomizing nozzle (2), a paint needle assembly, a trigger (3), and a needle plug (10), wherein a venting channel (4) controlled by the trigger (3) is provided inside the gun body (1), and a paint chamber (5) is provided at the end of the gun body (1); characterized in that: The gun body (1) is provided with a front positioning component (6) and a rear positioning component that connect the needle assembly to it. The needle assembly includes a front needle rod (8) and a rear needle rod (9). The front needle rod (8) is positioned and connected to the gun body (1) through the front positioning component (6), and the rear needle rod (9) is positioned and connected to the gun body (1) through the rear positioning component. One end of the front needle rod (8) is fixedly connected to the needle plug (10), and the other end is fixedly connected to the rear needle rod (9). The needle plug (10), the front needle rod (8), and the rear needle rod (9) are respectively provided with interconnected needle rod vent holes (11). The needle rod vent hole (11) in the rear needle rod (9) is connected to the venting channel (4) in the gun body (1). The atomizing nozzle (2) is provided with a discharge hole (12), and the needle rod vent hole (11) corresponds to the discharge hole (12).

2. The venting structure for the paint needle in a paint gun according to claim 1, characterized in that: The needle bar vent (11) and the discharge hole (12) are on the same central axis.

3. The venting structure for the paint needle in a paint gun according to claim 1 or 2, characterized in that: The gun body (1) is provided with a mounting chamber (13) for installing a rear positioning component. The rear positioning component is a needle chamber sleeve (7). The rear needle rod (9) is inserted into the needle chamber sleeve (7), and an internal air intake gap (14) is formed between the two. The needle chamber sleeve (7) is fixed in the mounting chamber (13) and an external air intake gap (25) is formed between it and the mounting chamber (13). The front needle rod (8) and the rear needle rod (9) are respectively provided with multiple external air intake holes (15) and internal air intake holes (16). The air passage (4), external air intake gap (25), external air intake hole (15), internal air intake gap (14), internal air intake hole (16), and needle rod air hole (11) are interconnected.

4. The venting structure for the paint needle in a paint gun according to claim 3, characterized in that: A sealing gasket (17) is provided between the needle chamber sleeve (7) and the mounting chamber (13), and a sealing ring (18) is provided between the needle chamber sleeve (7) and the rear needle bar (9).

5. The venting structure for the paint needle in a paint gun according to claim 3, characterized in that: An air intake adjustment assembly (26) is installed and connected to the mounting chamber (13) of the gun body (1). At the same time, the air intake adjustment assembly (26) is connected to the rear needle rod (9) and is adjusted and controlled.

6. The venting structure for the paint needle in a paint gun according to claim 1, characterized in that: The front positioning assembly (6) includes a guide screw seat (19) and a sealing seat (20). The guide screw seat (19) is screwed and fixed to the gun body (1). The front needle rod (8) is connected to the gun body (1) through the guide screw seat (19) and the sealing seat (20).

7. The venting structure for the paint needle in a paint gun according to claim 3, characterized in that: The needle chamber sleeve (7) is provided with an external air inlet groove (21), and an external air inlet gap (25) is formed between the external air inlet groove (21) and the mounting chamber (13). The rear needle rod (9) is provided with an internal air inlet groove (22), and an internal air inlet gap (14) is formed between the rear needle rod (9) and the needle chamber sleeve (7) through the internal air inlet groove (22).

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