A UV light-cured solder resist device

Abstract

The utility model discloses a kind of UV photocuring solder resist oil devices of anti-dripping, including nozzle pipeline, the nozzle pipeline is hollow tubular structure, one end is glue inlet, the other end is nozzle outlet, the upper end of the nozzle pipeline is equipped with solder oil pipe fitting;Spring-loaded valve body mechanism is set to nozzle outlet inside, the spring-loaded valve body mechanism includes valve body, reset spring and limiting support;The valve body lower end is T-shaped, one end of the reset spring is fixedly connected valve body lower end outer wall, the other end is fixed on limiting support;And nozzle body, the nozzle anti-dripping mechanism of the present application simple structure, without power supply control, response fast, automatic opening and closing, maintenance-free and strong adaptability, utilize the natural balance of oil pressure and elasticity, realize the automatic opening and closing and physical seal of nozzle, effectively prevent glue liquid from leaking in non-operating state, improve the cleanliness, stability and service life of point glue equipment.

Description

Technical Field

[0001] This utility model relates to the field of UV-curable solder resist technology, specifically a drip-proof UV-curable solder resist device. Background Technology

[0002] In high-precision processes such as electronics manufacturing, PCB coating, and LED packaging, UV-curable solder resist (also known as UV green solder mask) is widely used for the protection and light shielding of circuit boards. This type of material has the characteristics of high viscosity, fast curing, and low volatility, and is usually applied precisely to the target area using automatic dispensing or spraying equipment.

[0003] Most common dispensing systems currently use pneumatic / electrically controlled valves combined with nozzles or spray heads to control liquid output. However, in practical applications, due to: 1. the high viscosity of the adhesive itself; 2. uneven release of residual pressure in the nozzle; 3. lack of a sealing structure at the outlet, etc., the adhesive often drips slowly after the equipment stops operating. This can cause PCB contamination and affect product appearance, or even short circuits, complete board scrapping, and increased rework rates. Traditional improvement methods mainly focus on: 1. improving program control accuracy and optimizing backflow control; 2. adding solenoid valves or air valves to control the outlet; 3. adding manual wiping or dispensing stop protection delays. However, these solutions have problems such as high cost, complex control, difficult maintenance, and insufficient reliability, and cannot completely avoid oil dripping under conditions of long-term use or unstable air pressure. Utility Model Content

[0004] The purpose of this invention is to provide a drip-proof UV-curable solder resist device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a drip-proof UV-curable solder resist device, comprising,

[0006] The nozzle pipe is a hollow tubular structure, with one end being an adhesive inlet and the other end being a nozzle outlet. The upper end of the nozzle pipe is equipped with a welding oil fitting.

[0007] A spring-loaded valve body mechanism is disposed inside the nozzle outlet. The spring-loaded valve body mechanism includes a valve body, a return spring, and a limiting bracket. The diameter of the valve body is larger than the inner diameter of the nozzle outlet. The valve body is slidably disposed at the lower end of the welding oil pipe fitting. The lower end of the valve body is T-shaped. One end of the return spring is fixedly connected to the outer wall of the lower end of the valve body, and the other end is fixed to the limiting bracket. The limiting bracket is integrally formed with the inner wall of the nozzle pipe.

[0008] And a nozzle body, wherein the nozzle body is located at the lower end of the nozzle pipe.

[0009] In a preferred embodiment: the valve body edge is provided with a flexible sealing layer; the height of the limiting bracket is higher than the inner wall of the bottom end of the nozzle pipe.

[0010] In a preferred embodiment: the welding oil fitting includes a pipe body and an extension block integrally formed at the lower end of the pipe body, wherein the wall of the extension block is provided with a plurality of equally spaced drainage ports.

[0011] In a preferred embodiment: the extension block is threadedly connected to the nozzle pipe, and the valve body is slidably connected to the inner wall of the extension block.

[0012] In a preferred embodiment: the reset spring adopts a double-layer spring structure, the reset spring includes a shape memory spring and a helical spring, the inner layer of the reset spring is a nickel-titanium alloy shape memory spring, and the outer layer is nested with a stainless steel helical spring.

[0013] In a preferred embodiment: the inner wall of the limiting bracket, the lower end wall of the tube body, and the nozzle body are all provided with flow guiding channels. The flow guiding channels provided on the limiting bracket and the inner wall of the nozzle body are connected to the nozzle outlet. The upper end of the valve body is provided with a first groove.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0015] This invention features a nozzle anti-drip mechanism that is simple in structure, requires no power control, has a fast response, automatic opening and closing, is maintenance-free, and highly adaptable. Through a spring-loaded valve body mechanism, when the adhesive supply stops, the return spring quickly pushes the valve body upward to block the nozzle outlet. Utilizing the natural balance of oil pressure and spring force, the nozzle automatically opens and closes and physically seals, effectively preventing adhesive leakage during non-operational periods. This improves the cleanliness, stability, and lifespan of the dispensing equipment. Compared to traditional devices, it effectively avoids adhesive dripping caused by adhesive viscosity and uneven nozzle residual pressure release, significantly reducing PCB contamination and device short circuits caused by dripping, thus reducing product scrap rates. It is applicable to multiple fields such as PCB manufacturing, LED packaging, and medical potting. Furthermore, the return spring employs a double-layer spring structure: the inner nickel-titanium alloy shape memory spring adjusts its elasticity according to the working state, while the outer stainless steel helical spring provides stable return force. The combination of these two elements improves the reliability of the device under different operating conditions, ensuring long-term stable operation and reducing the probability of malfunctions. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the UV-curable solder resist oil device of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the UV-curable solder resist oil device of this utility model.

[0019] Figure 3 This is a schematic diagram of the lower end structure of the extension block of this utility model;

[0020] In the diagram: 1. Nozzle pipe; 2. Inlet; 3. Nozzle outlet; 4. Valve body; 5. Return spring; 6. Limiting bracket; 7. Nozzle body; 8. Pipe body; 9. Extension block; 10. Drain port; 11. Guide channel; 12. First groove; 13. Memory spring; 14. Helical spring. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-3 This utility model provides a technical solution: a drip-proof UV-curable solder resist device, comprising,

[0023] Nozzle pipe 1, the nozzle pipe 1 is a hollow tubular structure, one end of which is a glue inlet 2 and the other end is a nozzle outlet 3, and the upper end of the nozzle pipe 1 is provided with a welding oil fitting;

[0024] A spring-loaded valve body mechanism is disposed inside the nozzle outlet 3. The spring-loaded valve body mechanism includes a valve body 4, a return spring 5, and a limiting bracket 6. The diameter of the valve body 4 is larger than the inner diameter of the nozzle outlet 3. The valve body 4 is slidably disposed at the lower end of the welding oil pipe fitting. The lower end of the valve body 4 is T-shaped. One end of the return spring 5 is fixedly connected to the outer wall of the lower end of the valve body 4, and the other end is fixed to the limiting bracket 6. The limiting bracket 6 is integrally formed with the inner wall of the nozzle pipe 1.

[0025] In use, connect the glue inlet 2 of the device to the external glue supply equipment, turn on the glue supply equipment, and the UV-curable solder resist oil enters the nozzle pipe 1 through the drain port 10 on the solder oil fitting. Under the action of glue pressure, the valve body 4 is pushed to move downward, opening the nozzle outlet 3. The glue is output from the nozzle outlet 3 through the guide channel 11 on the limit bracket 6 and the inner wall of the nozzle body 7 for dispensing. After the dispensing operation is completed, turn off the glue supply equipment, the glue pressure disappears, and under the action of the return spring 5, the valve body 4 moves upward quickly, blocking the guide channel 11 provided on the lower end wall of the pipe body 8 to prevent glue leakage.

[0026] And the nozzle body 7, which is located at the lower end of the nozzle pipe 1.

[0027] The valve body 4 has a flexible sealing layer at its edge; the limiting bracket 6 is higher than the inner wall of the bottom end of the nozzle pipe 1.

[0028] The welding oil fitting includes a pipe body 8 and an extension block 9 integrally formed at the lower end of the pipe body 8. The extension block 9 has several equally spaced drainage ports 10 on its wall.

[0029] The extension block 9 is threadedly connected to the nozzle pipe 1, and the valve body 4 is slidably connected to the inner wall of the extension block 9.

[0030] The reset spring 5 adopts a double-layer spring structure. The reset spring 5 includes a shape memory spring 13 and a helical spring 14. The inner layer of the reset spring 5 is a nickel-titanium alloy shape memory spring 13, and the outer layer is nested with a stainless steel helical spring 14.

[0031] The limiting bracket 6, the lower end wall of the tube body 8, and the nozzle body 7 are all provided with flow guiding channels 11. The flow guiding channels 11 provided on the limiting bracket 6 and the inner wall of the nozzle body 7 are connected to the nozzle outlet 3. The upper end of the valve body 4 is provided with a first groove 12.

[0032] Finally, it should be noted that: all parts not described in this utility model are the same as or can be implemented using existing technology. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drip-proof UV-curable solder resist device, characterized in that: include, Nozzle pipe (1), the nozzle pipe (1) is a hollow tubular structure, one end of which is a glue inlet (2) and the other end is a nozzle outlet (3), and the upper end of the nozzle pipe (1) is provided with a welding oil fitting; A spring-loaded valve body mechanism is located inside the nozzle outlet (3). The spring-loaded valve body mechanism includes a valve body (4), a return spring (5), and a limiting bracket (6). The diameter of the valve body (4) is larger than the inner diameter of the nozzle outlet (3). The valve body (4) is slidably located at the lower end of the welding oil pipe. The lower end of the valve body (4) is T-shaped. One end of the return spring (5) is fixedly connected to the outer wall of the lower end of the valve body (4), and the other end is fixed to the limiting bracket (6). The limiting bracket (6) is integrally formed with the inner wall of the nozzle pipe (1). And the nozzle body (7), which is located at the lower end of the nozzle pipe (1).

2. The anti-drip UV curing solder resist device according to claim 1, characterized in that: The valve body (4) has a flexible sealing layer at its edge; the limiting bracket (6) is higher than the inner wall of the bottom end of the nozzle pipe (1).

3. The anti-drip UV-curable solder resist device according to claim 2, characterized in that: The welding oil fitting includes a pipe body (8) and an extension block (9) integrally formed at the lower end of the pipe body (8). The extension block (9) has several equally spaced drainage ports (10) on its wall.

4. The anti-drip UV curing solder resist device according to claim 3, characterized in that: The extension block (9) is threadedly connected to the nozzle pipe (1), and the valve body (4) is slidably connected to the inner wall of the extension block (9).

5. The anti-drip UV curing solder resist device according to claim 1, characterized in that: The reset spring (5) adopts a double-layer spring structure. The reset spring (5) includes a memory spring (13) and a helical spring (14). The inner layer of the reset spring (5) adopts a nickel-titanium alloy shape memory spring (13), and the outer layer is nested with a stainless steel helical spring (14).

6. The anti-drip UV curing solder resist device according to claim 4, characterized in that: The inner wall of the limiting bracket (6), the lower end wall of the tube body (8) and the nozzle body (7) are all provided with flow guiding channels (11). The flow guiding channels (11) provided on the limiting bracket (6) and the inner wall of the nozzle body (7) are connected to the nozzle outlet (3). The upper end of the valve body (4) is provided with a first groove (12).

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