A production process of a spray gun

Abstract

The present invention relates to a production process of a spray gun in the field of spray guns. The spray gun includes a spray gun rod, a front fixing rod, a rear fixing rod, a flared opening, a fixing nut, a nozzle, a thimble and a button buckle. One end of the nozzle is connected to one end of the thimble. The other end of the thimble sequentially passes through the spray gun body, a fixing sleeve and a spring, and is connected to the button buckle. The flared opening is screwed to the front fixing rod through a fixing nut and fastened using an electric screwdriver to complete the assembly. After airtightness and atomization effect tests and inspection of the packaging, the structure of the spray gun is simple, which facilitates production and processing, is conducive to saving production and processing time, reducing production costs, has fewer component structures and simple installation, thus facilitating the assembly and cooperation of the spray gun components, reducing the assembly relationship between spray guns, and detecting the airtightness and atomization effect of the spray gun through an airtightness tester and an atomization test nozzle.

Description

Technical Field

[0001] The present invention relates to the field of spray guns, and particularly to a production process of a spray gun. Background Art

[0002] A spray gun is a relatively common spraying tool in daily life, and its application range is quite wide. For example, it can be used as a tool for spraying paint or coating, with many advantages such as convenience, labor saving, and high efficiency. A spray gun connected to an atomizer can also be a tool for atomizing spraying materials and uniformly spraying them on the surface of an object. Currently, the existing atomizing spray guns on the market generally include a nozzle, a spray pipe, a thimble, and a regulating valve. The nozzle is installed at the end of the spray pipe, the thimble is arranged on the nozzle, and the regulating valve is installed on the spray pipe to regulate the flow rate inside the spray pipe. The thimble realizes the opening and closing of the spray orifice of the nozzle.

[0003] In the prior art, the structural settings of the components of the spray gun are complex, and its assembly during production is cumbersome, resulting in limited production time, which is not conducive to the rapid production and installation of the spray gun. Moreover, due to the complex structure of the existing spray gun, the processing technology required is also complex and cumbersome, resulting in more assembly connections between components, making it difficult to ensure the connection stability between components, which affects the production quality of the spray gun and the subsequent spraying effect. Therefore, it is necessary to improve the production process and connection structure of the spray gun to improve the production quality of the spray gun. Summary of the Invention

[0004] The purpose of the present invention is to solve the above defects and provide a production process of a spray gun to solve the technical problem that the structure of the spray gun in the above background art is complex and affects the production and assembly of the spray gun.

[0005] The purpose of the present invention is achieved in the following way:

[0006] A production process of a spray gun includes the following steps:

[0007] Step S1, rough machining;

[0008] Use a cutting machine to cut out the corresponding blank materials, which include a spray gun rod, a front fixing rod, a rear fixing rod, a bell mouth, a fixing nut, a nozzle, a thimble, and a button buckle, and process them through processing equipment to complete rough machining;

[0009] Step S2, grinding and finishing;

[0010] Perform surface grinding on the spray gun rod, the front fixing rod, and the rear fixing rod after rough machining to complete finishing;

[0011] Step S3, main body welding;

[0012] Insert the front fixing rod and the rear fixing rod into both sides of the spray gun rod respectively, and perform interference fit with the spray gun rod. Then, use a welding device to weld the connection parts of the front fixing rod, the rear fixing rod and the spray gun rod to form the spray gun body;

[0013] Step S4, Assembly;

[0014] The nozzle is connected to one end of the ejector pin. The other end of the ejector pin sequentially passes through the spray gun body, the fixing sleeve and the spring, and is connected to the button buckle. The bell mouth is screwed to the front fixing rod through the fixing nut and tightened with an electric screwdriver to complete the assembly;

[0015] Step S5, Air tightness test;

[0016] Connect the test air pipes to both ends of the spray gun rod of the assembled spray gun, and place it in the water tank of the air tightness tester to detect whether the air tightness is qualified after connecting the test air pipes to both ends of the spray gun rod;

[0017] Step S6, Atomization effect test;

[0018] Connect the test nozzle to the front fixing rod, connect a water injection pipe to one end of the spray gun rod, and connect an air pump to the other end. Press the button buckle to detect whether the spraying state of the nozzle is qualified;

[0019] Step S7, Inspection and packaging;

[0020] After visually inspecting that the surface of the spray gun has no scratches, deformations or concave-convex points, use a blister box for packaging.

[0021] Further in the above description, in step S1, the processing equipment includes a CNC milling machine and a CNC lathe. Use the CNC lathe to process the surfaces of the spray gun rod, the front fixing rod and the rear fixing rod to form a cylindrical shape, and use the CNC milling machine to process the air inlet hole and the water inlet hole of the spray gun rod.

[0022] Further in the above description, in step S1, on both sides of the spray gun rod, installation groove holes for installing the front fixing rod and the rear fixing rod are symmetrically processed by a CNC milling machine. Through holes for mating with the ejector pin are opened in the installation groove holes, and the ejector pin is milled by a CNC milling machine.

[0023] Further in the above description, in step S2, a centerless grinding machine is used for surface grinding treatment, and its grinding accuracy is -0.002mm - 0.002mm, and the surface roughness is 0.16um - 0.04um.

[0024] Further in the above description, in step S3, a laser welding machine is used to perform laser welding on the connection parts of the front fixing rod, the rear fixing rod and the spray gun rod, and the welding of the laser welding machine ensures the welding accuracy of the welding parts.

[0025] Further in the above description, in step S3, after the spray gun is welded and processed, it further includes an oxidation treatment. The surface of the spray gun is degreased and washed with water, then the processed spray gun workpiece is put into the electrolyte for oxidation treatment, and finally it is washed with clean water and dried. Through the oxidation and rust prevention treatment, the corrosion damage of the spray gun by the sprayed material is prevented.

[0026] Further in the above description, in step S4, a first waterproof ring is provided at one end of the ejector pin connected to the nozzle. A flange is provided at one end of the nozzle close to the ejector pin, and a second waterproof ring is sleeved on the outer surface of the flange. A sealing ring is sleeved inside the fixing sleeve to enhance the sealing performance of the spray gun connection and prevent the leakage of the sprayed material.

[0027] Further in the above description, in step S5, the spray gun is arranged in the water tank. The surface of the spray gun is submerged by the liquid in the water tank. After the test air pipe injects air, the end of the spray gun close to the nozzle can be ventilated, so as to realize the airtightness detection.

[0028] The beneficial effects of the present invention: The structure of the spray gun is simple, which is convenient for production and processing, helps to save the production and processing time, reduce the production cost. After the processing is completed, the spray gun body is assembled with the flare, the fixing nut, the nozzle, the ejector pin and the button buckle to form the spray gun. Its parts have few structures and are easy to install, which is conducive to the assembly and cooperation of the spray gun parts, reduces the assembly relationship between the spray guns, and the airtightness and atomization effect of the spray gun are detected by the airtightness tester and the atomization test nozzle. Description of the Drawings

[0029] Figure 1 is a three-dimensional view of the spray gun in the production process of a spray gun of the present invention;

[0030] Figure 2 is a structural schematic diagram of the spray gun in the production process of a spray gun of the present invention;

[0031] Figure 3 is a process block diagram of the production process of a spray gun of the present invention;

[0032] The reference numerals in the drawings are respectively: 1 - spray gun rod, 2 - front fixing rod, 3 - rear fixing rod, 4 - flare, 5 - fixing nut, 6 - nozzle, 7 - ejector pin, 8 - button buckle, 9 - through hole, 10 - first waterproof ring, 11 - sealing ring, 12 - fixing sleeve, 13 - spring. Detailed Embodiments

[0033] The present invention will be further described in detail below in conjunction with the drawings and the specific embodiments.

[0034] In this embodiment, referring to Figures 1 - 3 , a specific production process of a spray gun of the present invention includes the following steps:

[0035] Step S1, rough machining;

[0036] Use a cutting machine to cut out the corresponding blank. The blank includes a spray gun rod 1, a front fixing rod 2, a rear fixing rod 3, a bell mouth 4, a fixing nut 5, a nozzle 6, a thimble 7 and a button buckle 8, and process them through processing equipment to complete rough machining. In step S1, the processing equipment includes a CNC milling machine and a CNC lathe. Use the CNC lathe to process the surfaces of the spray gun rod 1, the front fixing rod 2 and the rear fixing rod 3 to form a cylindrical shape, and process the air inlet hole and the water inlet hole of the spray gun rod 1 through the CNC milling machine. In step S1, symmetrically process the installation slot holes for installing the front fixing rod 2 and the rear fixing rod 3 on both sides of the spray gun rod 1 through the CNC milling machine. A through hole 9 for mating with the thimble 7 is provided in the installation slot hole, and the thimble 7 is milled through the CNC milling machine.

[0037] Step S2, grinding and finishing;

[0038] Perform surface grinding on the rough-machined spray gun rod 1, front fixing rod 2 and rear fixing rod 3 to complete finishing. In step S2, use a centerless grinding machine for surface grinding treatment, with a grinding accuracy of -0.002mm - 0.002mm and a surface roughness of 0.16um - 0.04um.

[0039] Step S3, main body welding;

[0040] Insert the front fixing rod 2 and the rear fixing rod 3 into both sides of the spray gun rod 1 respectively, and perform interference fit with the spray gun rod 1. Use welding equipment to weld the connection parts of the front fixing rod 2, the rear fixing rod 3 and the spray gun rod 1 to form a spray gun body. In step S3, use a laser welding machine to perform laser welding on the connection parts of the front fixing rod 2, the rear fixing rod 3 and the spray gun rod 1, and the welding of the laser welding machine ensures the welding accuracy of the welding part. In step S3, after the spray gun is welded and processed, it also includes oxidation treatment. Degrease and wash the surface of the spray gun, then put the processed spray gun workpiece into the electrolyte for oxidation treatment, and finally wash it with clean water and dry it. Through oxidation and rust prevention treatment, prevent the corrosion and damage of the spray gun by the sprayed material.

[0041] Step S4, assembly;

[0042] Connect one end of the nozzle 6 with the thimble 7. The other end of the thimble 7 passes through the spray gun body, the fixing sleeve 12 and the spring 13 in sequence, and is connected with the button buckle 8. The bell mouth 4 is screwed to the front fixing rod 2 through a fixing nut and tightened with an electric screwdriver to complete the assembly. In step S4, a first waterproof ring 10 is provided at the end of the thimble 7 connected to the nozzle 6. A convex edge is provided at one end of the nozzle 6 close to the thimble 7, and a second waterproof ring is sleeved on the outer surface of the convex edge. A sealing ring 11 is sleeved inside the fixing sleeve 12 to enhance the sealing performance of the spray gun connection and prevent the leakage of the sprayed material.

[0043] Step S5, airtightness test;

[0044] Connect the test air pipes to both ends of the spray gun rod 1 of the assembled spray gun, and place it in the water tank of the airtightness tester to detect whether the airtightness is qualified after connecting the test air pipes to both ends of the spray gun rod 1. In step S5, the spray gun is placed in the water tank, and the liquid in the water tank submerges the surface of the spray gun. After injecting air into the test air pipe, the end of the spray gun near the nozzle 6 can be ventilated, so as to realize the airtightness detection.

[0045] Step S6, atomization effect test;

[0046] Connect the test nozzle 6 to the front fixing rod 2, connect one end of the spray gun rod 1 to the water injection pipe, and the other end to the air pump. By pressing the button buckle 8, detect whether the spraying state of the nozzle 6 is qualified;

[0047] Step S7, inspection and packaging;

[0048] After visually inspecting that the surface of the spray gun has no scratches, deformations or bumps, use a blister box for packaging.

[0049] The specific working principle of the present invention is that the corresponding spray gun rod 1, front fixing rod 2, rear fixing rod 3, bell mouth 4, fixing nut 5, nozzle 6, thimble 7 and button buckle 8 are processed by a CNC lathe and a CNC milling machine. The surfaces of the spray gun rod 1, front fixing rod 2 and rear fixing rod 3 are ground by a centerless grinding machine and welded by a laser welding machine to form the spray gun body. After welding, the components are subjected to an oxidation treatment. The structure of the spray gun is simple, which is convenient for production and processing, helps to save the production and processing time, and reduces the production cost. After processing, the spray gun body is assembled with the bell mouth 4, fixing nut 5, nozzle 6, thimble 7 and button buckle 8, and the first waterproof ring 10 and the second waterproof ring are used to seal and abut the connection parts, so as to assemble and form the spray gun. Its components have few structures and are easy to install, which is conducive to the assembly and cooperation of the spray gun components, reduces the assembly relationship between the spray guns, and the airtightness and atomization effect of the spray gun are detected by an airtightness tester and an atomization test nozzle 6.

[0050] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention is disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, when making some changes or modifications to the above-disclosed technical content to obtain an equivalent embodiment of equivalent changes, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiment according to the technical meaning of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A production process of a spray gun, characterized in that, It includes the following steps: Step S1, rough machining; Use a cutting machine to cut out the corresponding blank materials, which include a spray gun rod, a front fixing rod, a rear fixing rod, a bell mouth, a fixing nut, a nozzle, a thimble and a button buckle, and process them through processing equipment to complete rough machining; Step S2, grinding and finishing; Perform surface grinding on the spray gun rod, front fixing rod and rear fixing rod after rough machining to complete finishing; Step S3, main body welding; Insert the front fixing rod and the rear fixing rod into both sides of the spray gun rod respectively, and make an interference fit with the spray gun rod. Use welding equipment to weld the connection parts of the front fixing rod and the rear fixing rod with the spray gun rod to form a spray gun main body; Step S4, assembly; One end of the nozzle is connected to the thimble. The other end of the thimble sequentially passes through the spray gun main body, a fixing sleeve and a spring, and is connected to the button buckle. The bell mouth is screwed to the front fixing rod through a fixing nut and tightened with an electric screwdriver to complete the assembly; Step S5, airtightness test; Connect the test air pipes to both ends of the spray gun rod of the assembled spray gun, and place it in the water tank of the airtightness tester to detect whether the airtightness is qualified after connecting the test air pipes to both ends of the spray gun rod; Step S6, atomization effect test; Connect the test nozzle to the front fixing rod, connect a water injection pipe to one end of the spray gun rod, and connect an air pump to the other end. Press the button buckle to detect whether the spraying state of the nozzle is qualified; Step S7, inspection and packaging; After visually inspecting that the surface of the spray gun has no scratches, deformations or concave-convex points, use a blister box for packaging.

2. The production process of a spray gun according to claim 1, characterized in that: In the said step S1, the processing equipment includes a CNC milling machine and a CNC lathe. Use the CNC lathe to process the surfaces of the spray gun rod, front fixing rod and rear fixing rod to form a cylindrical shape, and process the air inlet hole and water inlet hole of the spray gun rod through the CNC milling machine.

3. The production process of a spray gun according to claim 2, characterized in that: In the said step S1, mounting groove holes for respectively mounting the front fixing rod and the rear fixing rod are symmetrically processed on both sides of the spray gun rod by the CNC milling machine, and through holes for mating with the thimble are provided in the mounting groove holes.

4. The production process of a spray gun according to claim 1, characterized in that: In the said step S2, a centerless grinding machine is used for surface grinding treatment.

5. The production process of a spray gun according to claim 1, characterized in that: In the said step S3, a laser welding machine is used to perform laser welding on the connection parts of the front fixing rod and the rear fixing rod with the spray gun rod.

6. The production process of a spray gun according to claim 5, characterized in that: In the said step S3, after the spray gun is welded and processed, it also includes an oxidation treatment. Degrease and wash the surface of the spray gun, then put the processed spray gun workpiece into the electrolyte for oxidation treatment, and finally wash it with clean water and dry it.

7. The production process of a spray gun according to claim 1, characterized in that: In the said step S4, a first waterproof ring is provided at one end of the thimble connected to the nozzle. A convex edge is provided at one end of the nozzle close to the thimble, and a second waterproof ring is sleeved on the outer surface of the convex edge. A sealing ring is sleeved in the fixing sleeve.

8. The production process of a spray gun according to claim 1, characterized in that: In the said step S5, the spray gun is placed in the water tank, and the liquid in the water tank submerges the surface of the spray gun.

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