A three-proofing coated drip-proof structure

Abstract

The utility model discloses a kind of three-proofing coating anti-dripping structures, including cylinder and being set in its inside inner cavity, the cylinder top is fixedly connected with connecting seat, the cylinder bottom is threadedly connected with spray head, the cylinder front and rear sides are fixedly connected with rotating rod, further include: closing mechanism: the closing mechanism includes the fixed frame of the inner wall in the inner cavity, the fixed frame top is fixedly connected with telescopic sleeve, spring is provided in the telescopic sleeve, the telescopic sleeve top is fixedly connected with baffle, the baffle top is fixedly connected with gasket, the baffle edge is fixedly connected with slide bar;Collecting mechanism: the collecting mechanism is rotatably connected in the cylinder outside.The three-proofing coating anti-dripping structure disclosed in the utility model has the effect of automatically and rapidly forming physical seal and collecting residual material in the instant of stopping feeding.

Description

Technical Field

[0001] This utility model relates to the field of coating anti-drip technology, and in particular to a three-proof coating anti-drip structure. Background Technology

[0002] Conformal coating is a process of applying a thin layer of special protective material to the surface of printed circuit boards and electronic components. The material is applied to the surface of the workpiece through a spray nozzle. This coating film will "follow" or "fit" the contour of the circuit board, just like putting a "protective coat" on the electronic circuit board, enhancing the reliability of the electronic circuit board and its components in harsh environments, and preventing or reducing damage caused by three typical harmful environmental factors: humidity, mold, and salt spray.

[0003] However, traditional three-proof coating equipment generally suffers from paint dripping during spraying, especially at the moment when the spraying cycle ends and the nozzle is closed. When the material supply stops, a small amount of unsprayed liquid paint remains in the feed pipe and inside the nozzle. Due to gravity and the residual pressure of the fluid in the pipeline, this residual paint often forms droplets and drips onto the workpiece, affecting the quality of the workpiece surface coating. For example, in traditional conformal coating systems, when the material delivery valve is closed at the end of the coating process, some coating residue remains inside the delivery pipe and nozzle. Under the influence of gravity and residual pressure in the pipeline, this residue gradually accumulates at the nozzle and forms droplets, eventually dripping onto the surface of the coated workpiece. This dripping phenomenon causes localized coating buildup and defects, directly affecting the product's appearance and protective quality. It can also contaminate areas that do not require coating, leading to a decrease in product yield and increased rework costs. Utility Model Content

[0004] This utility model discloses a three-proof coating anti-drip structure, which aims to solve the technical problem that after the material supply is stopped, a small amount of unsprayed liquid coating remains inside the feed pipe and nozzle of the traditional three-proof coating device. The residual coating often forms droplets and drips onto the workpiece, affecting the coating quality of the workpiece surface.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A three-proof coating anti-drip structure includes a cylinder and an inner cavity therein. A connecting seat is fixedly connected to the top of the cylinder, a nozzle is threadedly connected to the bottom of the cylinder, and rotating rods are fixedly connected to the front and rear sides of the cylinder. The structure also includes: a closing mechanism: the closing mechanism includes a fixing frame fixedly connected to the inner wall of the inner cavity, a telescopic sleeve fixedly connected to the top of the fixing frame, a spring disposed inside the telescopic sleeve, a baffle fixedly connected to the top of the telescopic sleeve, a gasket fixedly connected to the top of the baffle, and a sliding rod fixedly connected to the edge of the baffle; and a collection mechanism: the collection mechanism is rotatably connected to the outside of the cylinder.

[0006] By adopting the above technical solution, during the spraying operation, the paint pressure from the connector pushes the gasket and the connected baffle downwards, compressing the spring below. This causes the baffle to detach from the top of the inner cavity, opening the channel so that the paint can flow smoothly through the fixing frame and finally be sprayed out from the nozzle. Once the spraying cycle ends and the supply pressure disappears, the compressed spring immediately releases its stored elastic potential energy, pushing the baffle and gasket upwards to quickly return to their original positions. This causes the baffle to tightly adhere to the top of the inner cavity, forming a main seal. At the same time, the gasket also tightly seals the bottom outlet of the connector, forming a double physical barrier. This action instantly and completely cuts off the connection path between the feed pipe and the nozzle, sealing the residual paint in the connector and upstream of the inner cavity, preventing it from dripping downwards under gravity or residual pressure, thus solving the problem of residual material leakage inside the feed pipe.

[0007] As a further embodiment of this utility model: the collecting mechanism includes a ring plate fixedly connected to the top of the slide rod, a connecting rod fixedly connected to the bottom of the ring plate, a slide rail slidably connected to the inner side of the connecting rod, a hinge rod hinged to the bottom end of the connecting rod, a collecting sleeve hinged to the other end of the hinge rod, and a discharge port provided at the bottom of the collecting sleeve.

[0008] By employing the above technical solution, the fluid pressure of the paint itself is used as a control signal to trigger the automatic response of the entire mechanical structure: During spraying, the feed pressure pushes the baffle to open the channel, and at the same time, the sliding rod linked to the baffle moves the top ring plate downward. Then, through a set of hinged linkage mechanisms, the collection sleeve located below the nozzle side is quickly unfolded and moved away from the nozzle outlet, ensuring an unobstructed spraying path. When spraying stops and the pressure drops sharply, the compressed spring is immediately released, driving the baffle to return to its original position to physically seal the feed inlet, cutting off the paint supply. At the same time, the sliding rod drives the ring plate to rise synchronously, and through the hinged linkage mechanism, the unfolded collection sleeve is quickly retracted inward, reset, and precisely covers the nozzle outlet end, forming a safety barrier. This completely captures even the very little residual paint that slips from the nozzle end and discharges it through the bottom discharge port. The seamless connection and double insurance from active cutting off to passive collection completely eliminates leakage.

[0009] In summary, this application includes at least one of the following beneficial technical effects: 1. It can automatically and quickly form a double physical seal the moment the material supply stops, cutting off the flow path of residual paint in the delivery pipe to the nozzle. The active cut-off method effectively solves the problem of dripping caused by gravity and residual pressure of residual material in the delivery pipe and cavity, improving the stability and reliability of coating quality.

[0010] 2. Through the automatic avoidance and precise capture of the collection sleeve, the extremely small amount of residual dripping that may occur at the end of the nozzle is captured, forming a seamless double insurance with the closing mechanism, realizing all-round protection from active cut-off to passive collection, completely eliminating dripping, and further ensuring the cleanliness and quality of the workpiece.

[0011] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a three-proof coating anti-drip structure proposed in this utility model.

[0013] Figure 2 This is an overall structural development diagram of a three-proof coating anti-drip structure proposed in this utility model.

[0014] Figure 3 This is a cylindrical cross-sectional view of a three-proof coating anti-drip structure proposed in this utility model.

[0015] Figure 4 This is a schematic diagram of the closing mechanism of a three-proof coating anti-drip structure proposed in this utility model.

[0016] Figure 5 This is a schematic diagram of a collection mechanism for a three-proof coating anti-drip structure proposed in this utility model.

[0017] In the attached diagram: 1. Cylinder; 2. Inner cavity; 3. Connecting seat; 4. Nozzle; 5. Rotating rod; 6. Fixing frame; 7. Telescopic sleeve; 8. Spring; 9. Baffle; 10. Gasket; 11. Slide rod; 12. Ring plate; 13. Connecting rod; 14. Slide rail; 15. Hinge rod; 16. Collection sleeve; 17. Discharge port. Detailed Implementation

[0018] 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.

[0019] Reference Figures 1 to 4A three-proof coating anti-drip structure includes a cylinder 1 and an inner cavity 2 formed therein. A connecting seat 3 is fixedly connected to the top of the cylinder 1, a nozzle 4 is threadedly connected to the bottom of the cylinder 1, and rotating rods 5 are fixedly connected to the front and rear sides of the cylinder 1. It also includes: a closing mechanism: the closing mechanism includes a fixing frame 6 fixedly connected to the inner wall of the inner cavity 2, a telescopic sleeve 7 fixedly connected to the top of the fixing frame 6, a spring 8 provided inside the telescopic sleeve 7, a baffle 9 fixedly connected to the top of the telescopic sleeve 7, a gasket 10 fixedly connected to the top of the baffle 9, and a sliding rod 11 fixedly connected to the edge of the baffle 9; and a collection mechanism: the collection mechanism is rotatably connected to the outside of the cylinder 1.

[0020] Specifically, during spraying, pressurized paint is introduced into the feed pipe. The pressure acts on the gasket 10 and baffle 9, generating a downward thrust. This thrust overcomes the preload of the spring 8, pushing the entire closed assembly downwards, causing it to disengage from the top of the inner cavity 2. At this time, the channel is opened, allowing the paint to flow through the inclined space around the fixing frame 6, enter the nozzle 4, and be sprayed out. When spraying ends, the feed pressure quickly disappears, and the elastic potential energy stored in the spring 8 pushes the baffle 9 and gasket 10 to quickly return to their original position. The baffle 9 fits tightly against the top of the inner cavity 2, while the gasket 10 tightly seals the bottom outlet of the connecting seat 3, forming a double physical seal. This cuts off the passage between the paint in the feed pipe and the nozzle 4, sealing the residual material inside the feed pipe.

[0021] The baffle 9 is attached to the top of the inner cavity 2, the gasket 10 is snapped into the bottom of the connecting seat 3, the diameter of the gasket 10 is the same as the inner diameter of the connecting seat 3, the baffle 9 is attached to the top of the inner cavity 2 to form the main sealing surface, the gasket 10 is snapped into the bottom of the connecting seat 3 and its diameter is the same as the inner diameter of the connecting seat 3 to form a precise radial seal, and the slide rod 11 is slidably connected to the top of the cylinder 1.

[0022] The bottom end of the spring 8 is fixedly connected to the top of the fixing frame 6, and the other end of the spring 8 is fixedly connected to the bottom of the baffle 9. The surface of the fixing frame 6 is designed with a slope. The slope design cleverly minimizes the obstruction of the paint fluid by its own structure, providing a smooth flow channel for the paint.

[0023] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 In a preferred embodiment, the collecting mechanism includes an annular piece 12 fixedly connected to the top of the slide rod 11, a connecting rod 13 fixedly connected to the bottom of the annular piece 12, a slide rail 14 slidably connected to the inner side of the connecting rod 13, a hinged rod 15 hinged to the bottom end of the connecting rod 13, a collecting sleeve 16 hinged to the other end of the hinged rod 15, and a discharge port 17 provided at the bottom of the collecting sleeve 16.

[0024] Specifically, when the closing mechanism opens under pressure and the baffle 9 moves downward, the slide rod 11, which is fixedly connected to the edge of the baffle 9, also moves downward simultaneously. The ring plate 12 at the top of the slide rod 11 then descends, and through the linkage mechanism composed of the connecting rod 13 and the hinge rod 15, the collecting sleeve 16 is unfolded downward and outward, moving it away from the spray path of the nozzle 4. When the closing mechanism resets under the action of the spring 8, the baffle 9 and the slide rod 11 rise simultaneously. The slide rod 11 drives the ring plate 12 to move upward, which in turn drives the collecting sleeve 16 to reset upward and inward through the linkage mechanism, precisely moving it to cover the outlet of the nozzle 4. This action is like an automatically extending "tray" that can reliably catch and collect any residual droplets that may slide off from the end of the nozzle 4, and can be actively discharged through the discharge port 17 at the bottom.

[0025] The inner side of the ring plate 12 is slidably connected to the surface of the connecting seat 3. There are two connecting rods 13. The two connecting seats 3 are symmetrically fixedly connected to the left and right sides of the ring plate 12. The inner side of the slide rail 14 is fixedly connected to the left and right sides of the cylinder 1. Through the cooperation of the ring plate 12, the connecting rods 13 and the slide rail 14, a stable and reliable guiding motion system is formed, which in turn drives the closing of the collecting sleeve 16.

[0026] The top of the hinge rod 15 is hinged to the outside of the cylinder 1 via the rotating rod 5. The bottom of the collection sleeve 16 is designed with a slope. The bottom of the discharge port 17 is fitted with a leak-proof plug. The slope design can use gravity to guide the captured residual paint to flow automatically to the discharge port 17 located at the lowest point, realizing the automatic collection and emptying of residual material. The collection sleeve 16 surrounds the nozzle 4 inside.

[0027] Reference Figure 1 , Figure 2 and Figure 3 In a preferred embodiment, the connecting seat 3 communicates with the inner cavity 2, the top of the connecting seat 3 is provided with a threaded line, and the bottom end of the cylinder 1 and the nozzle 4 are connected by a threaded pair.

[0028] Specifically, the threaded line on the top of the connector 3 provides a fast, reliable and sealed standard interface with the external feed pipe, which greatly simplifies the installation and disassembly process of the equipment. The cylinder 1 and the nozzle 4 are connected by a threaded pair, which allows the core spraying component nozzle 4 to be quickly replaced or cleaned according to process requirements, avoiding the nozzle 4 from being blocked and affecting the coating effect.

[0029] Working Principle: In use, the top of the connecting seat 3 is connected to the feed pipe. When the spraying system is started, pressurized paint enters from the connecting seat 3. The pressure acts on the gasket 10 and the baffle 9, generating a downward thrust that successfully overcomes the resistance of the spring 8, pushing the entire baffle 9 assembly downward and detaching it from the top of the inner cavity 2, thus opening the main paint channel. The paint can then flow smoothly through the inclined space of the fixing frame 6 and be sprayed out from the nozzle 4. At the same time, the sliding rod 11, which is rigidly connected to the baffle 9, also moves downward, causing the ring plate 12 at its top to descend. The ring plate 12, through the linkage mechanism composed of the connecting rod 13 and the hinge rod 15, unfolds the collecting sleeve 16 located below the nozzle 4 downward and outward, quickly moving it away from the nozzle 4 outlet, thus clearing an unobstructed path for the spraying operation. When the spraying is finished, the spraying system is turned off, and the feed pressure suddenly disappears. At this time, after the hydraulic pressure applied to the baffle 9 disappears, the compressed spring 8 immediately releases its elastic potential energy, driving the baffle 9 and the gasket 10 to rapidly return to their original position. The baffle 9 tightly seals the top of the inner cavity 2, and the gasket 10 simultaneously seals the bottom outlet of the connecting seat 3, forming a physical seal and cutting off the path of the upstream residual paint to the nozzle 4. At the same time, the slide rod 11 also drives the ring plate 12 to rise synchronously. The upward movement of the ring plate 12, through the above-mentioned linkage mechanism, immediately drives the collecting sleeve 16 to move upward and inward to reset, accurately move and tightly cover the area directly below the nozzle 4 outlet, blocking the dripping of residual material at the nozzle 4.

[0030] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A three-proof coating anti-drip structure, comprising a cylinder (1) and an inner cavity (2) therein, wherein a connecting seat (3) is fixedly connected to the top of the cylinder (1), a nozzle (4) is threadedly connected to the bottom of the cylinder (1), and rotating rods (5) are fixedly connected to the front and rear sides of the cylinder (1), characterized in that, Also includes: Closing mechanism: The closing mechanism includes a fixed frame (6) fixedly connected to the inner wall of the inner cavity (2), a telescopic sleeve (7) fixedly connected to the top of the fixed frame (6), a spring (8) provided inside the telescopic sleeve (7), a baffle (9) fixedly connected to the top of the telescopic sleeve (7), a gasket (10) fixedly connected to the top of the baffle (9), and a slide rod (11) fixedly connected to the edge of the baffle (9). Collection mechanism: The collection mechanism is rotatably connected to the outside of the cylinder (1).

2. The drip-proof structure according to claim 1, wherein The top of the baffle (9) is attached to the top of the inner cavity (2), the gasket (10) is snapped into the bottom of the connecting seat (3), the diameter of the gasket (10) is the same as the inner diameter of the connecting seat (3), and the slide rod (11) is slidably connected to the top of the cylinder (1).

3. The drip-proof structure according to claim 2, wherein The bottom end of the spring (8) is fixedly connected to the top of the fixing frame (6), and the other end of the spring (8) is fixedly connected to the bottom of the baffle (9). The surface of the fixing frame (6) is designed with an inclined surface.

4. The drip-proof structure according to claim 1, wherein The collecting mechanism includes a ring plate (12) fixedly connected to the top of the slide rod (11), a connecting rod (13) fixedly connected to the bottom of the ring plate (12), a slide rail (14) slidably connected to the inner side of the connecting rod (13), a hinge rod (15) hinged to the bottom end of the connecting rod (13), a collecting sleeve (16) hinged to the other end of the hinge rod (15), and a discharge port (17) provided at the bottom of the collecting sleeve (16).

5. The drip-proof structure according to claim 4, wherein The inner side of the ring piece (12) is slidably connected to the surface of the connecting seat (3). There are two connecting rods (13). The two connecting seats (3) are symmetrically fixedly connected to the left and right sides of the ring piece (12). The inner side of the slide rail (14) is fixedly connected to the left and right sides of the cylinder (1).

6. The drip-proof structure according to claim 5, wherein The top of the hinge rod (15) is hinged to the outside of the cylinder (1) via the rotating rod (5). The bottom of the inner part of the collecting sleeve (16) is designed with a slope. The bottom of the discharge port (17) is fitted with a leak-proof plug. The collecting sleeve (16) surrounds the nozzle (4) inside.

7. The drip-proof structure according to claim 1, wherein The connecting seat (3) communicates with the inner cavity (2), and the top of the connecting seat (3) is provided with a threaded line. The bottom end of the cylinder (1) and the nozzle (4) are connected by a threaded pair.

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