Earphone shell gradient paint spraying process

Abstract

The invention relates to the technical field of electronic accessory processing and production, in particular to an earphone shell gradient paint spraying process which comprises the following steps that an earphone shell is clamped through a fixing clamp, and then the fixing clamp is installed on a conveying device; the conveying device is used for driving the fixing clamp to move, so that the fixing clamp passes through the paint spraying device while rotating; paint spraying is conducted on the earphone shells on the fixing clamps through a paint spraying device; the paint spraying device comprises a plurality of paint spraying units arranged in sequence, each paint spraying unit comprises a first spraying gun and a second spraying gun, the included angle between the output end of each first spraying gun and the horizontal plane is 10-20 degrees, and the included angle between the output end of each second spraying gun and the horizontal plane is 10-20 degrees. The first spray gun and the second spray gun are respectively used for spraying paint with different colors to the product. According to the headphone shell paint spraying device, the headphone shell with the gradient color appearance effect can be finally formed in the mode that the headphone shell is sprayed with paint from different angles through the multiple first spray guns and the multiple second spray guns.

Description

Technical Field

[0001] This invention relates to the field of electronic component processing and manufacturing technology, and in particular to a gradient color spray painting process for headphone shells. Background Technology

[0002] Currently, most headphone shells use solid colors or patterns for their exterior, resulting in a rather monotonous appearance that is not conducive to attracting users. Furthermore, due to current technological limitations, headphone shells with gradient colors are more expensive. Summary of the Invention

[0003] This invention addresses the problems of existing technologies by providing a gradient color spraying process for headphone shells, enabling low-cost production of headphone shells with a gradient color appearance from the side to the top.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention provides a gradient color spray painting process for earphone shells, comprising the following steps: The earphone shell is held in place by a clamping fixture, and then the clamping fixture is installed onto the transmission device. The fixed clamp is driven to move by a transmission device, so that the fixed clamp rotates while passing through the painting device; The earphone shell on the fixing fixture is painted using a spray painting device; The painting device includes several painting units arranged in sequence. Each painting unit includes a first spray gun and a second spray gun. The angle between the output end of the first spray gun and the horizontal plane is 10-20°, and the angle between the output end of the second spray gun and the horizontal plane is 10-20°. During operation, the first spray gun is located above the fixed fixture, and the second spray gun is located below the fixed fixture. The first spray gun and the second spray gun are used to spray different colors of paint onto the product.

[0005] Furthermore, the diameter of both the first and second spray guns is less than 0.5 mm, and the pressure is 0.1-0.3 MPa.

[0006] Furthermore, the mounting of the fixing clamp to the transmission device specifically includes: The product is fitted onto the rotating shaft of the transmission device; The drive shaft, which is fitted with a fixed clamp, rotates. Determine if the product rotates along with the rotating shaft. If so, proceed to the next step; otherwise, remove the product from the rotating shaft.

[0007] Furthermore, the drive sleeve rotates the rotating shaft of the product, which is achieved in one of the following two ways: 1) A first gear is provided on the rotating shaft, and a second gear is provided on the transmission device. The transmission device drives the rotating shaft to move until the first gear and the second gear mesh. When the first gear moves relative to the second gear, the first gear rotates to drive the rotating shaft to rotate. 2) A sensor and a driver are installed on the rotating shaft. When the sensor detects that the product is fitted onto the rotating shaft, the driver drives the rotating shaft to rotate.

[0008] Furthermore, the rotational angular velocity of the fixing clamp when passing the painting device is 180-360 rad / s.

[0009] Furthermore, the specific operation mode of the painting device is as follows: The signal of the fixed clamp entering the spray painting device is obtained through the identification device; The first spray gun is controlled to start spraying paint after a first preset time following the acquisition of a signal by the identification device; The second spray gun is controlled to start spraying paint after a second preset time following the acquisition of a signal by the identification device; When the identification device detects that the drive device is no longer transmitting the fixed clamp, it controls the first spray gun to stop spraying after a first preset time after the identification device stops receiving the signal, and controls the second spray gun to stop spraying after a second preset time after the identification device stops receiving the signal.

[0010] Furthermore, the first spray guns of several painting units each have different angles with the horizontal plane, and the second spray guns of several painting units each have different angles with the horizontal plane.

[0011] Furthermore, the first spray gun is located to the side of the second spray gun.

[0012] Furthermore, it also includes the following steps: The fixing fixture after passing through the spray painting device is transferred to the drying oven, where the headphone shell is dried. The fixture after passing through the oven is moved to the coating machine for coating treatment.

[0013] Furthermore, the fixing clamp that holds the earphone shell specifically includes: Insert the fixing head of the fixing clamp into the earphone shell; Control the rotation of the fixing head relative to the fixing clamp so that the fixing head opens up after rotation, thereby abutting against the inner wall of the earphone shell to fix the earphone shell.

[0014] The beneficial effects of the present invention are as follows: The present invention uses several first spray guns and several second spray guns to spray paint onto the earphone shell from different angles. By spraying different colors of paint evenly and in small thicknesses, an earphone shell with a gradient color appearance can be formed. This method is suitable for assembly line production, thereby reducing costs. Attached Figure Description

[0015] Figure 1 A flowchart of the present invention.

[0016] Figure 2 This is a schematic diagram of the painting apparatus using the present invention.

[0017] Reference numerals: 1—First spray gun, 2—Second spray gun, 3—Identification device, 4—Drive device, 5—Rotating shaft, 6—Fixed clamp. Detailed Implementation

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 and Figure 2 As shown, the present invention provides a gradient color spray painting process for earphone shells, comprising the following steps: The earphone shell is held in place by the fixing clamp 6, and then the fixing clamp 6 is installed onto the transmission device; The fixed clamp 6 is driven to move by the transmission device, so that the fixed clamp 6 rotates while passing through the painting device; The earphone shell on the fixing fixture 6 is painted using a spray painting device.

[0020] In actual use, the painting device includes several painting units arranged in sequence. Each painting unit includes a first spray gun 1 and a second spray gun 2. The angle between the output end of the first spray gun 1 and the horizontal plane is 10-20°, and the angle between the output end of the second spray gun 2 and the horizontal plane is 10-20°. During operation, the first spray gun 1 is located above the fixed clamp 6, and the second spray gun 2 is located below the fixed clamp 6. The first spray gun 1 and the second spray gun 2 are used to spray different colors of paint onto the earphone shell.

[0021] For example, spray gun 1 sprays orange paint, and spray gun 2 sprays black paint. Since black can cover orange, with the earphone shell facing downwards as the reference view, when spraying, spray gun 1 sprays orange paint on the top and part of the sides of the earphone shell, and then spray gun 2 sprays black paint on the sides of the earphone shell. Therefore, when black paint is sprayed, the areas covered by black and orange paint will be dominated by black paint. Because the earphone shell rotates continuously with the fixing clamp 6 during spraying, the paint on the surface of the earphone shell is thin and uniform. Taking orange paint as an example, the edge of the orange paint coverage area is less than the top of the earphone shell, so that this part will show a mixed visual effect of orange paint and the earphone shell's own color, and the paint thickness at the edge will be less than the paint thickness in the middle part. When black paint is sprayed, this part will show a mixed visual effect of black paint and orange paint, serving as a gradient transition color between orange and black, thereby achieving the desired gradient color appearance. Since the edge area is covered by two sprays, the total paint thickness at the edge area is basically the same as the paint thickness of the solid color area.

[0022] This invention utilizes a series of spraying devices to achieve a spraying sequence of orange, black, orange, black, and so on, with each spray producing a thin, uniform layer of paint. Multiple sprays ensure better uniformity in the areas covered by the solid color, and prevent excessive thickness and unevenness in areas where two paints are applied simultaneously. Furthermore, the mixing effect from multiple sprays results in a more even and smooth gradient visual effect.

[0023] In this embodiment, the diameter of both the first spray gun 1 and the second spray gun 2 is less than 0.5 mm, and the pressure is 0.1-0.3 MPa. That is, the first spray gun 1 and the second spray gun 2 used in this invention are both small-diameter, low-pressure, high-atomization spray guns, preferably with a diameter of 0.3 mm and a pressure of 0.1 MPa. Under these parameters, the atomization effect can be guaranteed, thereby making the paint layer more uniform.

[0024] In this embodiment, the step of installing the fixing clamp 6 onto the transmission device specifically includes: Place the earphone shell onto the rotating shaft 5 of the transmission device; The rotating shaft 5, which is fitted with a fixed clamp 6, rotates. Determine whether the earphone shell rotates along with the rotating shaft 5. If so, proceed to the next step; otherwise, remove the earphone shell from the rotating shaft 5.

[0025] After the earphone shell is fitted onto the rotating shaft 5, the rotating shaft 5 needs to be tested to ensure that it can smoothly drive the earphone shell to rotate. Therefore, this invention includes a structure to drive the rotating shaft 5 to rotate after the earphone shell is loaded, which is then tested. Only after the test is passed is it proven that the rotating shaft 5 is working properly, and the earphone shell will continue to be fitted onto the rotating shaft 5 to ensure the yield rate of the earphone shell.

[0026] Furthermore, the rotating shaft 5, which is fitted with the earphone shell, rotates in one of the following two ways: 1) A first gear is provided on the rotating shaft 5, and a second gear is provided on the transmission device. The transmission device drives the rotating shaft 5 to move until the first gear meshes with the second gear. When the first gear moves relative to the second gear, the first gear rotates to drive the rotating shaft 5 to rotate. 2) A sensor and a driver are installed on the rotating shaft 5. When the sensor detects that the earphone shell is fitted onto the rotating shaft 5, the driver drives the rotating shaft 5 to rotate.

[0027] For method 1), it is only necessary to set the second gear at a specific position of the first transmission device so that the first gear meshes with the second gear when it passes by. Then, as the transmission belt continues to drive the rotating shaft 5 to move, the first gear will force the second gear to rotate, thereby causing the first gear itself to rotate, thus achieving the effect of rotating the drive shaft.

[0028] As for method 2), the rotation effect of the rotating shaft 5 is more stable and independent, but since each rotating shaft 5 needs to be equipped with a sensor and a driver, the cost is higher.

[0029] Regardless of the method, the desired rotation effect of the rotating shaft 5 can be achieved. That is, for the test position of the rotating shaft 5 and the spray position of the earphone shell, either method 1) or method 2 can be used.

[0030] In this embodiment, the rotational angular velocity of the fixing clamp 6 when passing through the painting device is 180-360 rad / s. The fixing clamp 6 drives the earphone shell to rotate horizontally during the paint spraying process, with a rotation speed of 1-2 revolutions per second. This ensures that the top and sides of the earphone shell are coated with paint more evenly during the paint spraying process. By having the first spray gun 1 and the second spray gun 2 positioned on only one side of the transmission device, the effect of uniform paint spraying can be achieved.

[0031] At the same time, setting the aforementioned rotational angular velocity ensures that each spray gun applies only a very thin layer of paint to the earphone shell. When multiple spray guns work together, a very thin but uniform layer of paint adheres to the surface of the earphone shell, giving the paint a more obvious gloss effect and making the transition of the gradient color area smoother.

[0032] In this embodiment, the painting device operates as follows: The signal that the fixed clamp 6 enters the spray painting device is obtained by the identification device 3; The first spray gun 1 is controlled to start spraying paint after a first preset time following the signal received by the identification device 3; The second spray gun 2 is controlled to start spraying paint after a second preset time following the signal received by the identification device 3; When the identification device 3 detects that the drive device 4 is no longer transmitting the fixed clamp 6, it controls the first spray gun 1 to stop spraying after a first preset time after the identification device 3 stops receiving the signal, and controls the second spray gun 2 to stop spraying after a second preset time after the identification device 3 stops receiving the signal.

[0033] Specifically, the identification device 3 is preferably a proximity switch. The proximity switch is used to identify whether there is a fixed clamp 6 on the rotating shaft 5 of the drive device 4. If there is a fixed clamp 6, the first spray gun 1 and the second spray gun 2 are controlled to start operating in sequence. If a stage of painting is completed, that is, there is no more earphone shell to be processed, then only the last earphone shell needs to be painted before the machine can be automatically stopped.

[0034] The first and second preset times mentioned in this application are essentially the time it takes for the earphone shell to reach the painting range of the first spray gun 1 / second spray gun 2. For example, if the speed at which the transmission device transmits the fixing fixture 6 is s, and the distance between the projection of the identification device 3 and the first spray gun 1 on the path of the driving device 4 is L, then the first preset time can be calculated as L / s. This method maximizes the stability of the painting process while avoiding excessive paint waste.

[0035] Specifically, the angles between the first spray gun 1 of each of the several painting units and the horizontal plane are all different, and the angles between the second spray gun 2 of each of the several painting units and the horizontal plane are also different. For example, if there are three painting units, there are three first spray guns 1. In this case, the angles of the three first spray guns 1 can be set to 12°, 15°, and 18° respectively. This setting ensures that the paint on the top of the earphone shell can be covered, while also ensuring a larger area around the edge of the earphone shell, thus ensuring a smoother gradient effect.

[0036] Specifically, the first spray gun 1 is located on one side of the second spray gun 2. That is, all the painting units are located on the same side of the transmission device. The product is rotated by the fixing clamp 6 to cooperate with the first spray gun 1 and the second spray gun 2 for painting, thereby ensuring uniform painting. Moreover, the fact that the first spray gun 1 and the second spray gun 2 are located on the same side also helps to ensure that the area of ​​paint splatter is small, reducing adverse environmental impact.

[0037] In this embodiment, the present invention further includes the following steps: The fixing fixture 6 after passing through the spray painting device is transferred to the drying oven, where the earphone shell is dried. The fixed fixture 6 after passing through the oven is moved to the coating machine for coating treatment.

[0038] After the painting is completed, the earphone shell needs to be baked and coated in sequence to ensure that the paint is reliably fixed and to protect the paint surface through coating, thereby preventing the gradient color from wearing off too quickly.

[0039] In this embodiment, the fixing clamp 6 holds the earphone shell, specifically including: Insert the fixing head of the fixing clamp 6 into the earphone shell; Control the fixing head to rotate relative to the fixing clamp 6 so that the fixing head will spread out after rotation, thereby abutting against the inner wall of the earphone shell to fix the earphone shell.

[0040] The fixing clamp 6 is an internal support type clamp. It achieves the fixing effect on the earphone shell by pushing outward from inside the shell against the inner side wall. For the specific clamping principle, please refer to Chinese utility model patents with patent numbers CN202321617968.X and CN202322540726.1. The internal support type clamp effectively holds the earphone shell and avoids excessive interference with the paint spraying on the earphone shell surface.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A gradient color spray painting process for earphone shells, characterized in that, Includes the following steps: The earphone shell is held in place by a clamping fixture, and then the clamping fixture is installed onto the transmission device. The fixed clamp is driven to move by a transmission device, so that the fixed clamp rotates while passing through the painting device; The earphone shell on the fixing fixture is painted using a spray painting device; The painting device includes several painting units arranged in sequence. Each painting unit includes a first spray gun and a second spray gun. The angle between the output end of the first spray gun and the horizontal plane is 10-20°, and the angle between the output end of the second spray gun and the horizontal plane is 10-20°. During operation, the first spray gun is located above the fixed fixture, and the second spray gun is located below the fixed fixture. The first spray gun and the second spray gun are used to spray different colors of paint onto the product.

2. The gradient color spray painting process for the earphone shell according to claim 1, characterized in that, The diameter of both the first and second spray guns is less than 0.5 mm, and the pressure is 0.1-0.3 MPa.

3. The gradient color spray painting process for the earphone shell according to claim 1, characterized in that, The process of installing the fixing clamp onto the transmission device specifically includes: The product is fitted onto the rotating shaft of the transmission device; The drive shaft, which is fitted with a fixed clamp, rotates. Determine if the product rotates along with the rotating shaft. If so, proceed to the next step; otherwise, remove the product from the rotating shaft.

4. The gradient color spray painting process for the earphone shell according to claim 3, characterized in that, The drive sleeve rotates the rotating shaft of the product, which is achieved in one of the following two ways: 1) A first gear is provided on the rotating shaft, and a second gear is provided on the transmission device. The transmission device drives the rotating shaft to move until the first gear and the second gear mesh. When the first gear moves relative to the second gear, the first gear rotates to drive the rotating shaft to rotate. 2) A sensor and a driver are installed on the rotating shaft. When the sensor detects that the product is fitted onto the rotating shaft, the driver drives the rotating shaft to rotate.

5. The gradient color spray painting process for the earphone shell according to claim 1, characterized in that, The rotational angular velocity of the fixed clamp when passing the painting device is 180-360 rad / s.

6. The gradient color spray painting process for the earphone shell according to claim 1, characterized in that, The specific operation mode of the painting device is as follows: The signal of the fixed clamp entering the spray painting device is obtained through the identification device; The first spray gun is controlled to start spraying paint after a first preset time following the acquisition of a signal by the identification device; The second spray gun is controlled to start spraying paint after a second preset time following the signal received by the identification device; When the identification device detects that the drive device is no longer transmitting the fixed clamp, it controls the first spray gun to stop spraying after a first preset time after the identification device stops receiving the signal, and controls the second spray gun to stop spraying after a second preset time after the identification device stops receiving the signal.

7. The gradient color spray painting process for the earphone shell according to claim 1 or 6, characterized in that, The first spray guns of several painting units each have different angles with the horizontal plane, and the second spray guns of several painting units each have different angles with the horizontal plane.

8. The gradient color spray painting process for the earphone shell according to claim 1 or 6, characterized in that, The first spray gun is located to one side of the second spray gun.

9. The gradient color spray painting process for the earphone shell according to claim 1, characterized in that, It also includes the following steps: The fixing fixture after passing through the spray painting device is transferred to the drying oven, where the headphone shell is dried. The fixture after passing through the oven is moved to the coating machine for coating treatment.

10. The gradient color spray painting process for the earphone shell according to claim 1, characterized in that, The fixing clamp holds the earphone shell, specifically including: Insert the fixing head of the fixing clamp into the earphone shell; Control the rotation of the fixing head relative to the fixing clamp so that the fixing head opens up after rotation, thereby abutting against the inner wall of the earphone shell to fix the earphone shell.

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