An aqueous paint electrostatic spray gun

Abstract

This utility model provides a water-based paint electrostatic spray gun, including a spray gun body and a stepped pressing head. A high-voltage electrostatic generator is installed at the nozzle of the spray gun body, and a nozzle is installed at the left end of the high-voltage electrostatic generator. A paint tube is threadedly installed at the lower end of the nozzle, and a plastic fixing cylinder is inclinedly fixed at the upper end of the nozzle by hot melt adhesive. A metal inner cylinder is inclinedly glued inside the plastic fixing cylinder, and a stepped hole is opened through the upper end of the metal inner cylinder. This design solves the problem that residual impurities (such as pigment particles) in water-based paint are easy to accumulate at the nozzle, and traditional spray guns require frequent shutdowns for cleaning. Disassembling the nozzle requires special tools and is time-consuming. This utility model adopts an elastic unclogging rubber pusher structure, which can quickly push out and clean the residual impurities of water-based paint accumulated at the nozzle without the need for special tools for disassembly and assembly, saving time and effort.

Description

Technical Field

[0001] This utility model relates to a water-based electrostatic paint spray gun, belonging to the field of spray gun technology. Background Technology

[0002] A water-based electrostatic spray gun is a coating device that uses a high-voltage electrostatic field to atomize and adsorb water-based paint onto the surface of a workpiece. It is widely used in the automotive, home appliance, and furniture industries. In existing technology, an electrostatic spray gun typically includes a spray gun body, a high-voltage electrostatic generator, a liquid supply system, and an atomizing device. Its working principle is as follows: paint enters the spray gun through a paint supply pipe, is given the same charge by the high-voltage electrostatic generator, and after atomization, disperses into fine particles due to charge repulsion, which are then adsorbed onto the grounded workpiece surface. The spray gun head is equipped with a nozzle, and compressed air forms a fan-shaped atomization through a central hole and transverse holes.

[0003] However, impurities (such as pigment particles) remaining in water-based paints tend to accumulate at the nozzles, requiring frequent machine shutdowns for cleaning. Disassembling the nozzles requires special tools and is time-consuming. There is an urgent need for a water-based paint electrostatic spray gun to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a water-based paint electrostatic spray gun to solve the problems mentioned in the background. This invention adopts an elastic unclogging rubber pusher structure, which can quickly push out and clean the water-based paint residue accumulated at the nozzle without the need for special tools for disassembly and assembly, thus saving time and effort.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a water-based paint electrostatic spray gun, comprising a spray gun body and a stepped pressing head, wherein a high-voltage electrostatic generator is installed at the nozzle of the spray gun body, and a nozzle is installed at the left end of the high-voltage electrostatic generator; a paint tube is threadedly installed at the lower end of the nozzle; a plastic fixing cylinder is obliquely fixed to the upper end of the nozzle by hot melt adhesive; a metal inner cylinder is obliquely adhered inside the plastic fixing cylinder; a stepped hole is formed through the upper end of the metal inner cylinder, and the stepped hole communicates with the inside of the nozzle; a flexible rubber pusher is slidably inserted into the stepped hole; a return spring is adhered to the stepped hole; and a stepped pressing head is inserted into the stepped hole; the lower end of the stepped pressing head is adhered to the flexible rubber pusher by adhesive.

[0006] Furthermore, a wind cap is screwed onto the left outer end of the nozzle, and a gun needle is provided on the right inner end of the nozzle.

[0007] Furthermore, a spray gun hook is installed on the upper end of the spray gun body, a flow rate adjustment knob is installed on the right end of the spray gun body, an air pressure adjustment knob is installed on the upper end of the spray gun body, a spray gun trigger is installed at the handle of the spray gun body, and an air pipe and electrostatic wire are installed on the lower end of the spray gun body.

[0008] Furthermore, a flexible plastic sheet is adhered to the lower end of the flexible rubber pusher.

[0009] Furthermore, the step pressing head is connected to the movable end of the reset spring.

[0010] Furthermore, the plastic fixing cylinder and the upper end of the metal inner cylinder are provided with threaded holes, and anti-loosening bolts are inserted into the threaded holes by thread, and the threaded end of the anti-loosening bolts abuts against the lower outer end of the step pressing head.

[0011] The beneficial effects of this utility model are as follows: This utility model provides an electrostatic spray gun for water-based paint. Because it adds a plastic fixed cylinder, a metal inner cylinder, a stepped pressing head, a return spring, a flexible rubber pusher, a flexible plastic sheet, and anti-loosening bolts, our design improvements and actual use have shown that this device has a reasonable structure and good practicality. The elastic unclogging rubber pusher structure can quickly push out and clean the water-based paint residue accumulated at the nozzle. No special tools are required for disassembly and assembly, the time consumption is short, and the operation and cleaning are time-saving and labor-saving. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a water-based paint electrostatic spray gun according to the present invention;

[0014] Figure 2 This is an enlarged schematic diagram of the nozzle of a water-based paint electrostatic spray gun according to the present invention.

[0015] Figure 3 This is a schematic diagram of the nozzle cross-section connection of an electrostatic spray gun for water-based paint according to this utility model.

[0016] In the diagram: 1-Spray gun body, 2-Flow rate adjustment knob, 3-Air pressure adjustment knob, 4-Spray gun hook, 5-Spray gun trigger, 6-Air hose, 7-Static wire, 8-Paint hose, 9-High voltage static generator, 10-Gun needle, 11-Nozzle, 12-Air cap, 13-Plastic fixing cylinder, 14-Metal inner cylinder, 15-Step hole, 16-Step pressing head, 17-Reset spring, 18-Flexible rubber push strip, 19-Flexible plastic sheet, 20-Anti-loosening bolt. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Please see Figures 1-3 This utility model provides a technical solution: a water-based paint electrostatic spray gun, including a spray gun body 1 and a stepped pressing head 16. A high-voltage electrostatic generator 9 is installed at the nozzle of the spray gun body 1, and a nozzle 11 is installed at the left end of the high-voltage electrostatic generator 9. A paint tube 8 is threadedly installed at the lower end of the nozzle 11. A plastic fixing cylinder 13 is obliquely fixed to the upper end of the nozzle 11 by hot melt adhesive. A metal inner cylinder 14 is obliquely glued inside the plastic fixing cylinder 13. A stepped hole 15 is opened through the upper end of the metal inner cylinder 14, and the stepped hole 15 is connected to the inside of the nozzle 11. A flexible rubber pusher 18 is slidably inserted into the stepped hole 15. A return spring 17 is glued into the stepped hole 15. A stepped pressing head 16 is inserted into the stepped hole 15. The lower end of the stepped pressing head 16 is glued to the flexible rubber pusher 18. This design solves the problem that residual impurities in water-based paint, such as pigment particles, are easy to accumulate at the nozzle. Traditional spray guns require frequent shutdowns for cleaning, and disassembling the nozzle requires special tools, which is time-consuming.

[0019] As the first embodiment of this utility model: a wind cap 12 is screwed onto the left side of the nozzle 11, a gun needle 10 is provided on the right side of the nozzle 11, a spray gun hook 4 is installed on the upper end of the spray gun body 1, a flow adjustment knob 2 is installed on the right side of the spray gun body 1, an air pressure adjustment knob 3 is installed on the upper end of the spray gun body 1, a spray gun trigger 5 is installed at the handle of the spray gun body 1, and an air pipe 6 and an electrostatic wire 7 are installed on the lower end of the spray gun body 1. The added high-voltage electrostatic generator 9, wind cap 12, gun needle 10, spray gun hook 4, flow adjustment knob 2, air pressure adjustment knob 3, spray gun trigger 5, air pipe 6, electrostatic wire 7, and paint pipe 8 are all mature components of existing electrostatic spray guns, so they will not be described in detail. A flexible plastic sheet 19 is glued to the lower end of the flexible rubber pusher 18. The added flexible plastic sheet 19 is made of polyurethane and has been optimized by a polishing process to make it smoother.

[0020] The stepped pressing head 16 is connected to the movable end of the return spring 17. By connecting the stepped pressing head 16 to the movable end of the return spring 17, it is possible to prevent the stepped pressing head 16 from detaching itself in the stepped hole 15.

[0021] The plastic fixing cylinder 13 and the upper end of the metal inner cylinder 14 are provided with threaded holes, and anti-loosening bolts 20 are inserted into the threaded holes through threads. The threaded end of the anti-loosening bolt 20 abuts against the lower outer end of the stepped pressing head 16. By adding the anti-loosening bolt 20 and abutting against the lower outer end of the stepped pressing head 16, the stepped pressing head 16 can be prevented from shaking on its own in the stepped hole 15.

[0022] As a second embodiment of this utility model: When water-based paint residue accumulates at the nozzle 11 after prolonged use of the spray gun, loosen the anti-loosening bolt 20 so that the threaded end of the anti-loosening bolt 20 does not abut against the lower outer end of the stepped pressing head 16. Then press the stepped pressing head 16, which compresses the return spring 17. At the same time, it will drive the flexible rubber pusher 18 to move out of the stepped hole 15 and insert into the nozzle 11. The flexible plastic sheet 19 contacts the inside of the nozzle 11 and slides to the left, thereby forcing the flexible rubber pusher 18 to deform and move to the left until the flexible rubber pusher 18 pushes out the water-based paint residue accumulated at the nozzle 11. This allows for convenient manual cleaning of the pushed-out water-based paint residue. After completing the process, manually clean the exposed flexible rubber pusher 18, then loosen the step pressing head 16. The return spring 17 will drive the step pressing head 16 to return to its original position, allowing the rubber pusher 18 and the flexible plastic sheet 19 to return to their initial positions. Then, retighten the anti-loosening bolt 20 so that the threaded end of the anti-loosening bolt 20 abuts against the lower outer side of the step pressing head 16, preventing the step pressing head 16 from vibrating within the step hole 15. (Note: The high-voltage electrostatic generator 9, air cap 12, gun needle 10, spray gun hook 4, flow adjustment knob 2, air pressure adjustment knob 3, spray gun trigger 5, air pipe 6, electrostatic wire 7, and paint pipe 8 are all existing mature components of electrostatic spray guns, so they will not be described in detail.)

[0023] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A water-based paint electrostatic spray gun, comprising a spray gun body (1) and a stepped pressing head (16), characterized in that: A high-voltage electrostatic generator (9) is installed at the nozzle of the spray gun body (1), and a nozzle (11) is installed at the left end of the high-voltage electrostatic generator (9). A paint tube (8) is installed at the lower end of the nozzle (11) through a thread. The upper end of the nozzle (11) is fixed with a plastic fixing cylinder (13) by hot melt adhesive. A metal inner cylinder (14) is inclinedly glued inside the plastic fixing cylinder (13). A stepped hole (15) is opened through the upper end of the metal inner cylinder (14), and the stepped hole (15) is connected to the inside of the nozzle (11). A flexible rubber pusher (18) is slidably inserted in the stepped hole (15). A reset spring (17) is glued in the stepped hole (15). A stepped pressing head (16) is inserted in the stepped hole (15). The lower end of the stepped pressing head (16) is glued to the flexible rubber pusher (18).

2. The electrostatic spray gun for water-based paint according to claim 1, characterized in that: The nozzle (11) has a wind cap (12) screwed onto its outer left end by a thread, and a gun needle (10) is provided on the inner right end of the nozzle (11).

3. The electrostatic spray gun for water-based paint according to claim 1, characterized in that: The spray gun body (1) is equipped with a spray gun hook (4) at the upper end, a flow adjustment knob (2) is installed at the right end of the spray gun body (1), an air pressure adjustment knob (3) is installed at the upper end of the spray gun body (1), a spray gun trigger (5) is installed at the handle of the spray gun body (1), and an air pipe (6) and an electrostatic wire (7) are installed at the lower end of the spray gun body (1).

4. The water-based paint electrostatic spray gun according to claim 1, characterized in that: The flexible rubber pusher (18) has a flexible plastic sheet (19) attached to its lower end.

5. The electrostatic spray gun for water-based paint according to claim 1, characterized in that: The step pressing head (16) is connected to the movable end of the return spring (17).

6. The electrostatic spray gun for water-based paint according to claim 1, characterized in that: The plastic fixing cylinder (13) and the metal inner cylinder (14) have threaded holes at their upper ends, and anti-loosening bolts (20) are inserted into the threaded holes by thread. The threaded end of the anti-loosening bolts (20) abuts against the lower outer end of the step pressing head (16).

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