Surface spraying method for rubber sealing ring

Abstract

The invention provides a surface spraying method for a rubber sealing ring, which comprises the following steps: bundling the rubber sealing ring by using a ring piece, and then putting the bundled rubber sealing ring and a rolling medium into rolling spraying equipment for rolling spraying to obtain the rubber sealing ring with the completely sprayed surface. The surface spraying method provided by the invention aims at the rubber sealing ring, especially a sealing ring with a large outer diameter (greater than or equal to 150mm) or a special-shaped sealing ring, the coating thickness is uniform, and the spraying effect and the use effect are good; and moreover, compared with a common roller coating process, the spraying difficulty of the rubber sealing ring which is made of a soft material and is in an irregular cube shape is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing rings, and in particular relates to a surface spraying method for a rubber sealing ring. Background Art

[0002] Rubber seals are a common sealing element used to prevent liquid or gas leakage in mechanical equipment or pipeline connections. However, rubber seals may encounter some problems during installation. For example, a lot of force may need to be applied during installation to ensure that the seal is correctly located in its designed position. In addition, after long-term use, the sealing performance of rubber seals may deteriorate due to friction or chemical corrosion, and then need to be replaced.

[0003] To solve these problems, various methods and technologies have been proposed. One of the methods is to use lubricants or lubricating waxes to reduce the installation force and friction of the seal ring and improve its sealing performance and service life. These lubricating waxes are usually coated on the surface of the seal ring to reduce friction with the installation surface and provide additional protection during use.

[0004] Traditional coating methods generally use immersion or spraying processes. For example, patents such as CN116037437A and CN111978581A disclose coating methods for the surface of sealing rings, which mainly use spraying processes. This method is only applicable to rubber sealing rings with small outer diameters or not easily deformed, and there may be some limitations. For example, uneven coating or excessive coating will affect the performance of the sealing ring. Therefore, it is necessary to provide a new wax coating method that can be applied to sealing rings with large outer diameters (≥150mm) or special shapes, and ensure that the lubricating wax is evenly covered on the surface of the sealing ring, and provide long-lasting performance during installation and use. Summary of the invention

[0005] The purpose of the present invention is to provide a surface spraying method for a rubber sealing ring, which ensures that the thickness and position of the lubricating wax coating on the surface of the rubber ring are uniform and ensures its installation performance for a large outer diameter (≥150mm) or special-shaped sealing ring.

[0006] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0007] The present invention provides a surface spraying method for a rubber sealing ring, the surface spraying method comprising the following steps:

[0008] The rubber sealing ring is bundled with a ring, and then the bundled rubber sealing ring and the rolling medium are put into the rolling spraying equipment for rolling spraying to obtain the rubber sealing ring with a completely sprayed surface.

[0009] The surface spraying method provided by the present invention bundles the rubber sealing ring in a certain way first to avoid the entanglement of the sealing ring with a relatively soft material and a non-cubic regular shape, and then adds a rolling medium in the rolling coating to fill the gaps between the sealing rings, completes the rolling spraying, and realizes the uniformity of the surface spraying of the rubber sealing ring to ensure its installation performance. Compared with the traditional immersion or spraying method, it is more suitable for large outer diameter (≥150mm) or special-shaped sealing rings, the coating thickness is more uniform, and the spraying effect and use effect are better; and, compared with the general rolling coating process, the method provided by the present invention solves the spraying problem of workpieces such as rubber sealing rings that are relatively soft and have a non-regular cubic shape.

[0010] Preferably, the diameter of the ring is 20-30 mm, for example, 20 mm, 22 mm, 24 mm, 25 mm, 26 mm, 28 mm or 30 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0011] Preferably, the diameter of the rubber sealing ring is 150-220 mm, for example, it can be 150 mm, 155 mm, 160 mm, 165 mm, 170 mm, 175 mm, 180 mm, 185 mm, 190 mm, 195 mm, 200 mm, 205 mm, 210 mm, 215 mm or 220 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0012] Preferably, the bundling method comprises folding the rubber sealing ring into two or more layers and then fixing it with a ring.

[0013] Preferably, the rolling medium comprises a rubber workpiece.

[0014] Preferably, the diameter of the rubber workpiece is 20-60 mm, for example, 20 mm, 30 mm, 40 mm, 50 mm or 60 mm, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0015] Preferably, the rotation frequency of the rolling spraying is 30-50 Hz, for example, it can be 30 Hz, 32 Hz, 35 Hz, 38 Hz, 40 Hz, 42 Hz, 45 Hz, 48 Hz or 50 Hz, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0016] Preferably, the spraying time of the rolling spraying is 3-5 seconds, for example, 3 seconds, 3.5 seconds, 4 seconds, 4.5 seconds or 5 seconds, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0017] Preferably, the spraying interval of the rolling spraying is 1-3 seconds, for example, 1 second, 1.5 seconds, 2 seconds, 2.5 seconds or 3 seconds, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0018] Preferably, the rolling spraying is sprayed 120-140 times, for example, 120 times, 122 times, 125 times, 128 times, 130 times, 132 times, 135 times, 138 times or 140 times, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0019] Preferably, the spraying amount of the rolling spraying is 0.1-0.15 g / piece, for example, it can be 0.1 g / piece, 0.11 g / piece, 0.12 g / piece, 0.13 g / piece, 0.14 g / piece or 0.15 g / piece, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0020] Preferably, the rubber sealing ring includes a special-shaped ring and / or an O-ring with a diameter ≥150 mm.

[0021] The diameter of the O-ring is ≥150 mm, for example, it can be 150 mm, 155 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm, 250 mm, 300 mm, 400 mm or 500 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0022] As a preferred technical solution of the surface spraying method provided by the present invention, the surface spraying method comprises the following steps:

[0023] (1) Before spraying, fold the rubber sealing ring with a diameter of 150-220 mm into more than 2 layers and use a plastic ring with a diameter of 20-30 mm to bundle them to prevent the rubber sealing rings from entangled with each other;

[0024] (2) Then put the tied rubber sealing ring into the rolling equipment, and add a rubber workpiece with a diameter of 20-60mm as the rolling medium to fill the gap between the rubber sealing rings and ensure that the sealing rings are completely rolled in the drum;

[0025] (3) Start the rolling equipment with a rotation frequency of 30-50 Hz, and spray the wax liquid at the same time to mix it evenly with the rubber sealing ring. The spraying amount is 0.1-0.15 g / piece. The spraying process includes 3-5 seconds per spray, 120-140 times of spraying, and the interval between two sprayings is 1-3 seconds. After the spraying is completed, a rubber sealing ring with a completely sprayed surface is obtained.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The surface spraying method provided by the present invention is aimed at rubber sealing rings, especially sealing rings with large outer diameter (≥150mm) or special-shaped ones, with uniform coating thickness, good spraying effect and use effect; and, compared with the general roller coating process, it solves the spraying problem of workpieces such as rubber sealing rings that are relatively soft and have irregular cubic shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a physical picture of the bundling effect of the surface spraying method provided in Example 1;

[0029] Figure 2 This is a physical picture of the spraying effect of the surface spraying method provided in Example 1. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0031] Example 1

[0032] This embodiment provides a surface spraying method for a rubber sealing ring. In this embodiment, the rubber sealing ring used is circular in shape with a diameter of 208 mm.

[0033] The surface spraying method comprises the following steps:

[0034] (1) Before spraying, fold the rubber seal ring into three layers and use a plastic ring with a diameter of 25 mm to tie the rubber seal ring to prevent the rubber seal rings from entangled with each other. The tying effect is as follows: Figure 1 As shown;

[0035] (2) Then put the tied rubber sealing ring into the drum, and add a rubber workpiece with a diameter of 40 mm as a rolling medium to fill the gap between the rubber sealing rings to ensure that the sealing rings are completely rolled in the drum;

[0036] (3) The rotating drum is rotated at a frequency of 40 Hz, and wax liquid is sprayed by a spray gun to mix evenly with the rubber sealing ring. The spraying amount is 0.12 g / piece. The spraying process is 4 seconds per spray, 130 times of spraying, and an interval of 2 seconds between two sprayings. After the spraying is completed, a rubber sealing ring with a completely sprayed surface is obtained.

[0037] In this embodiment, the spraying effect of the rubber sealing ring with a completely sprayed surface is as follows: Figure 2 As shown, it can be seen that the surface uniformity of the rubber sealing ring is good and the spraying effect is good.

[0038] Example 2

[0039] This embodiment provides a surface spraying method for a rubber sealing ring. In this embodiment, the rubber sealing ring used is circular in shape with a diameter of 150 mm.

[0040] The surface spraying method comprises the following steps:

[0041] (1) Before spraying, fold the rubber sealing ring into three layers and use a plastic ring with a diameter of 20 mm to tie the rubber sealing ring to prevent the rubber sealing rings from entangled with each other;

[0042] (2) Then put the tied rubber sealing ring into the drum, and add a rubber workpiece with a diameter of 20 mm as a rolling medium to fill the gap between the rubber sealing rings to ensure that the sealing rings are completely rolled in the drum;

[0043] (3) The rotating drum is rotated at a frequency of 30 Hz, and wax liquid is sprayed by a spray gun to mix evenly with the rubber sealing ring. The spraying amount is 0.15 g / piece. The spraying process is 3 seconds per spray, 140 times of spraying, and 1 second interval between two sprayings. After the spraying is completed, a rubber sealing ring with a completely sprayed surface is obtained.

[0044] In this embodiment, the surface of the rubber sealing ring is sprayed evenly.

[0045] Example 3

[0046] This embodiment provides a surface spraying method for a rubber sealing ring. In this embodiment, the rubber sealing ring used is circular in shape with a diameter of 220 mm.

[0047] The surface spraying method comprises the following steps:

[0048] (1) Before spraying, fold the rubber sealing ring into three layers and use a plastic ring with a diameter of 30 mm to tie the rubber sealing ring to prevent the rubber sealing rings from entangled with each other;

[0049] (2) Then put the tied rubber sealing ring into the drum, and add a rubber workpiece with a diameter of 60 mm as a rolling medium to fill the gap between the rubber sealing rings to ensure that the sealing rings are completely rolled in the drum;

[0050] (3) The rotating drum is rotated at a frequency of 50 Hz, and wax liquid is sprayed by a spray gun to mix evenly with the rubber sealing ring. The spraying amount is 0.1 g / piece. The spraying process is 5 seconds per spray, 120 times of spraying, and an interval of 3 seconds between two sprayings. After the spraying is completed, a rubber sealing ring with a completely sprayed surface is obtained.

[0051] In this embodiment, the surface of the rubber sealing ring is sprayed evenly.

[0052] Comparative Example 1

[0053] This comparative example provides a surface spraying method for a rubber sealing ring, and the surface spraying method comprises the following steps:

[0054] (1) Place the rubber sealing ring into the drum and add a rubber workpiece with a diameter of 40 mm as a rolling medium to fill the gap between the rubber sealing rings and ensure that the sealing rings are completely rolled in the drum;

[0055] (3) The rotating drum is rotated at a frequency of 40 Hz, and wax liquid is sprayed by a spray gun to mix evenly with the rubber sealing ring. The spraying amount is 0.12 g / piece. The spraying process is 4 seconds per spray, 130 times of spraying, and an interval of 2 seconds between two sprayings. After the spraying is completed, the sprayed rubber sealing ring is obtained.

[0056] That is, compared with Example 1, the rubber seal ring is not bundled, and the rest is the same as Example 1.

[0057] In this comparative example, the rubber sealing ring is larger in size and softer in material. The rubber ring that is not bundled is entangled, there are dead angles for spraying, and the spraying uniformity is poor.

[0058] Comparative Example 2

[0059] This comparative example provides a surface spraying method for a rubber sealing ring, and the surface spraying method comprises the following steps:

[0060] (1) Before spraying, fold the rubber sealing ring into three layers and use a plastic ring with a diameter of 25 mm to tie the rubber sealing ring to prevent the rubber sealing rings from entangled with each other;

[0061] (2) Then put the tied rubber sealing ring into the drum;

[0062] (3) The rotating drum is rotated at a frequency of 40 Hz, and wax liquid is sprayed by a spray gun to mix evenly with the rubber sealing ring. The spraying amount is 0.12 g / piece. The spraying process is 4 seconds per spray, 130 times of spraying, and an interval of 2 seconds between two sprayings. After the spraying is completed, the sprayed rubber sealing ring is obtained.

[0063] That is, compared with Example 1, no rolling medium is added, and the rest is the same as Example 1.

[0064] In this comparative example, there is no rolling medium, the inner side of the rubber sealing ring is not sprayed evenly, and the spraying uniformity is poor.

[0065] In summary, the surface spraying method provided by the present invention is aimed at rubber sealing rings, especially those with large outer diameter (≥150mm) or special-shaped sealing rings, with uniform coating thickness, good spraying effect and use effect; and, compared with the general roller coating process, it solves the spraying problem of workpieces such as rubber sealing rings that are relatively soft and have irregular cubic shapes.

[0066] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A surface spraying method for a rubber sealing ring, characterized in that: The surface spraying method comprises the following steps: The rubber sealing ring is bundled with a ring, and then the bundled rubber sealing ring and the rolling medium are put into the rolling spraying equipment for rolling spraying to obtain the rubber sealing ring with a completely sprayed surface.

2. The surface spraying method according to claim 1, characterized in that: The diameter of the ring is 20-30 mm; Preferably, the diameter of the rubber sealing ring is 150-220 mm.

3. The surface spraying method according to claim 1 or 2, characterized in that: The bundling method comprises folding the rubber sealing ring into more than two layers and then fixing it with a ring.

4. The surface spraying method according to any one of claims 1 to 3, characterized in that: The rolling medium includes a rubber workpiece.

5. The surface spraying method according to claim 4, characterized in that: The diameter of the rubber workpiece is 20-60 mm.

6. The surface spraying method according to any one of claims 1 to 5, characterized in that: The rotation frequency of the rolling spraying is 30-50 Hz.

7. The surface spraying method according to any one of claims 1 to 6, characterized in that: The spraying time of the rolling spraying is 3-5 seconds; Preferably, the spraying interval of the rolling spraying is 1-3 seconds; Preferably, the rolling spraying is performed 120-140 times.

8. The surface spraying method according to any one of claims 1 to 7, characterized in that: The spraying amount of the rolling spraying is 0.1-0.15 g / piece.

9. The surface spraying method according to any one of claims 1 to 8, characterized in that: The rubber sealing ring includes a special-shaped ring and / or an O-ring with a diameter of ≥150 mm.

10. The surface spraying method according to any one of claims 1 to 9, characterized in that: The surface spraying method comprises the following steps: (1) Before spraying, fold the rubber sealing ring with a diameter of 150-220 mm into more than 2 layers and use a plastic ring with a diameter of 20-30 mm to bundle them to prevent the rubber sealing rings from entangled with each other; (2) Then put the tied rubber sealing ring into the rolling equipment, and add a rubber workpiece with a diameter of 20-60mm as the rolling medium to fill the gap between the rubber sealing rings and ensure that the sealing rings are completely rolled in the drum; (3) Start the rolling equipment with a rotation frequency of 30-50 Hz, and spray the wax liquid at the same time to mix it evenly with the rubber sealing ring. The spraying amount is 0.1-0.15 g / piece. The spraying process includes 3-5 seconds per spray, 120-140 times of spraying, and the interval between two sprayings is 1-3 seconds. After the spraying is completed, a rubber sealing ring with a completely sprayed surface is obtained.

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