High-temperature-resistant and corrosion-resistant silicone rubber sealing ring and manufacturing method thereof
By coating the outer surface of the silicone rubber seal ring with UV-resistant and high-temperature resistance and setting up reinforcement components inside, the problem of seal ring failure due to external pressure is solved, the sealing performance and aging resistance are improved, and the service life is extended.
Patent Information
- Application Number
- CN202510572347.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-07-29
AI Technical Summary
The existing high-temperature and corrosion-resistant silicone rubber sealing rings are prone to failure due to external pressure during long-term operation, and the sealing and anti-aging properties are insufficient, resulting in a shortened service life.
The outer surface of the silicone rubber seal ring is coated with an ultraviolet-resistant and high-temperature corrosion-resistant layer, and reinforcement components are provided inside, including reinforcement layers, sealing layers, reinforcement support layers and protective layers. Interlayer bonding is achieved through adhesives. The reinforcement components are composed of specific materials to improve the structural strength and anti-aging properties of the seal ring.
It enhances the structural strength, compressive strength and aging resistance of the silicone rubber seal ring, prevents deformation and rupture, extends the service life, and ensures stable operation under high pressure and dynamic environments.
Smart Images
Figure CN120384958A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of silicone rubber sealing rings, and specifically relates to a high-temperature resistant and corrosion-resistant silicone rubber sealing ring and a manufacturing method thereof. Background Art
[0002] Silicone rubber sealing rings are a common type of sealing element, widely used in environments that require high temperature resistance, aging resistance, and strong weather resistance. They are made of silicone rubber materials and have physical and chemical properties. Silicone rubber sealing rings are mainly used to prevent the leakage of liquids and gases, or to protect equipment from dust, dirt, and other external pollutants. Silicone rubber sealing rings can withstand high temperatures and can generally operate stably within the temperature range of -50°C to +230°C. Silicone rubber has electrical insulation properties and can be used as an electrical seal in the electronics and automotive industries. Silicone rubber sealing rings do not age easily and can provide long-term reliability and sealing effects. In automotive engines, headlights, and cooling system components, silicone rubber sealing rings are used to seal joints to prevent the leakage of liquids and gases and ensure the normal operation of equipment.
[0003] However, an existing high-temperature resistant and corrosion-resistant silicone rubber sealing ring and its manufacturing method are not perfect and still have certain defects: Silicone rubber sealing rings are mainly used to seal joints to prevent the leakage of liquids and gases. Therefore, the sealing rings will be in contact with the sealed medium for a long time. Therefore, it is necessary to enhance the sealing performance and anti-aging performance of the sealing rings to prevent the sealing rings from deforming and cracking. Silicone rubber sealing rings will fail due to external pressure during long-term operation, shortening the service life of the silicone rubber sealing rings. Summary of the Invention
[0004] The purpose of the present invention is to provide a high-temperature resistant and corrosion-resistant silicone rubber sealing ring and a manufacturing method thereof, so as to solve the problems mentioned in the above background art, namely, the need to enhance the sealing performance and anti-aging performance of the sealing ring, prevent the sealing ring from deforming and cracking, and the silicone rubber sealing ring will fail due to external pressure during long-term operation.
[0005] To achieve the above purpose, the present invention provides the following technical solution: A high-temperature resistant and corrosion-resistant silicone rubber sealing ring, including a silicone rubber sealing ring part, an anti-ultraviolet layer is coated on the outer surface of the silicone rubber sealing ring part, a high-temperature resistant and corrosion-resistant layer is coated on the outer surface of the anti-ultraviolet layer, and a reinforcing component is arranged inside the silicone rubber sealing ring part. The reinforcing component includes a reinforcing layer, a sealing layer, a reinforcing support layer, and a protective layer.
[0006] Preferably, the thickness of the high-temperature resistant and corrosion-resistant layer is greater than the thickness of the anti-ultraviolet layer. The protective layer is arranged on the outer surface of the silicone rubber sealing ring part, and the reinforcing support layer is arranged inside the silicone rubber sealing ring part.
[0007] Preferably, the thickness of the protective layer is less than that of the reinforcing support layer. The sealing layer is adhesively bonded to the outer surface of the reinforcing support layer, and the reinforcing layer is adhesively bonded to the outer surface of the sealing layer.
[0008] Preferably, the thickness of the reinforcing layer is less than that of the sealing layer. The thickness of the sealing layer is equal to that of the reinforcing support layer. The reinforcing components are adhesively bonded to each other layer by layer through an adhesive. The composition of the adhesive includes resin, plasticizer, filler, and curing agent.
[0009] Preferably, the resin includes epoxy resin, natural resin, and chloroprene rubber. The plasticizer includes dioctyl phthalate. The filler includes inorganic filler and organic filler. The inorganic filler is silica, and the organic filler is fiber. The curing agent is polyurethane.
[0010] Preferably, the main component of the silicone rubber sealing member is a silicone rubber matrix, which is a polymer formed by connecting silicon and oxygen elements through silicon-oxygen chains. The types of silicone rubber include vinyl silicone rubber and fluorosilicone rubber.
[0011] Preferably, the ultraviolet-resistant layer is titanium dioxide, and the high-temperature and corrosion-resistant layer is made of fluorinated rubber.
[0012] A manufacturing method of a high-temperature and corrosion-resistant silicone rubber sealing ring includes the following steps: The first step: Raw material preparation: Select a high-temperature and corrosion-resistant silicone rubber resin, usually vinyl silicone rubber, and add a reinforcing agent, a vulcanizing agent, a plasticizer, and an ultraviolet-resistant agent to it; The second step: Batching and mixing: Use a mixer to mix the components so that they are evenly distributed in the silicone rubber; The third step: Molding and processing: Place the mixed silicone rubber raw material in a mold and process it by compression molding or injection molding; The fourth step: Vulcanization treatment: Through the vulcanization reaction, the molecular structure of the rubber cross-links to form a three-dimensional network structure, thereby enhancing its elasticity, heat resistance, and corrosion resistance; The fifth step: Cooling and cutting: After vulcanization is completed, take out the silicone rubber sealing ring from the mold, and through cooling treatment, make it harden and reach the final physical properties. Trim and cut the sealing ring as necessary to ensure accurate dimensions and remove excess materials; The sixth step: Inspection and packaging: The finished silicone rubber sealing ring needs to be subjected to quality inspection, including dimensional inspection, appearance inspection, and temperature and corrosion resistance tests.
[0013] The beneficial effects of the present invention are as follows: Through the cooperation of the anti-ultraviolet layer, high-temperature and corrosion-resistant layer, reinforcement layer, sealing layer, enhanced support layer and protective layer provided by the present invention, the main component of the silicone rubber sealing ring is a silicone rubber matrix, which is a polymer formed by connecting silicon and oxygen elements through silicon-oxygen chains. The types of silicone rubber include vinyl silicone rubber and fluorosilicone rubber. The anti-ultraviolet layer is titanium dioxide, which has an ultraviolet shielding effect and can effectively protect the silicone rubber from ultraviolet damage. The high-temperature and corrosion-resistant layer is made of fluorinated rubber material, which is a material with heat resistance and chemical stability and can withstand high temperatures as well as the corrosion of strong acid and strong alkali chemical substances. The reinforcement layer is made of reinforcing fiber material, which can improve the strength, high-temperature resistance and aging resistance of the silicone rubber. The role of the reinforcement layer is to improve the structural strength, compressive strength and durability of the sealing ring, prevent the silicone rubber sealing ring from deforming and cracking under high pressure and dynamic environments, and the reinforcement layer helps to improve the tensile resistance and compressive resistance of the sealing ring to ensure that it will not fail due to external pressure during long-term operation. The sealing layer is pure silicone rubber, and its main function is to provide a sealing function to prevent liquid and gas leakage. The enhanced support layer is made of aluminum alloy material, which belongs to a high-strength fiber-reinforced composite material. The role of the enhanced support layer is to provide stronger structural support, maintain the stable shape of the silicone rubber sealing ring, prevent the silicone rubber sealing ring from deforming when the temperature changes, and the enhanced support layer can also increase the anti-aging property of the silicone rubber sealing ring and extend its service life. The protective layer is made of synthetic rubber material, and its main function is to protect the inner layer from damage by the external environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a front view structural schematic diagram of the present invention; Figure 2 is a top view sectional structural schematic diagram of the present invention; Figure 3 for the present invention Figure 2 enlarged view of part A in.
[0015] In the figure: 1. Silicone rubber sealing ring; 2. Anti-ultraviolet layer; 3. High-temperature and corrosion-resistant layer; 4. Reinforcement layer; 401. Sealing layer; 402. Enhanced support layer; 403. Protective layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.
[0017] Such as Figures 1 to 3As shown in the figure, the embodiment of the present invention provides a technical solution for a high-temperature and corrosion-resistant silicone rubber sealing ring and its manufacturing method: Embodiment 1
[0018] As Figures 1 - 2 shown, a high-temperature and corrosion-resistant silicone rubber sealing ring includes a silicone rubber sealing ring member 1. An ultraviolet-resistant layer 2 is coated on the outer surface of the silicone rubber sealing ring member 1. A high-temperature and corrosion-resistant layer 3 is coated on the outer surface of the ultraviolet-resistant layer 2. An enhancing component is arranged inside the silicone rubber sealing ring member 1. The enhancing component includes an enhancing layer 4, a sealing layer 401, an enhancing support layer 402, and a protective layer 403. The thickness of the high-temperature and corrosion-resistant layer 3 is greater than that of the ultraviolet-resistant layer 2. The protective layer 403 is arranged on the outer surface of the silicone rubber sealing ring member 1. The enhancing support layer 402 is arranged inside the silicone rubber sealing ring member 1. The thickness of the protective layer 403 is less than that of the enhancing support layer 402. The sealing layer 401 is bonded to the outer surface of the enhancing support layer 402. The enhancing layer 4 is bonded to the outer surface of the sealing layer 401. The main component of the silicone rubber sealing ring member 1 is a silicone rubber matrix, which is a polymer formed by connecting silicon and oxygen elements through a silicon-oxygen chain. The types of silicone rubber include vinyl silicone rubber and fluorosilicone rubber. The ultraviolet-resistant layer 2 is titanium dioxide, which has an ultraviolet shielding effect and can effectively protect silicone rubber from ultraviolet damage. The high-temperature and corrosion-resistant layer 3 is made of a fluorinated rubber material, which is a material with heat-resistant performance and chemical stability and can withstand high temperatures and the corrosion of strong acid and strong base chemical substances. The enhancing layer 4 is made of an enhancing fiber material and can improve the strength, high-temperature resistance, and aging resistance of silicone rubber. Embodiment 2
[0019] On the basis of Embodiment 1, as Figures 2 - 3As shown, the thickness of the reinforcement layer 4 is less than that of the sealing layer 401, the thickness of the sealing layer 401 is equal to that of the reinforcement support layer 402. The reinforcement components are adhesively bonded to each other through an adhesive. The composition of the adhesive includes resin, plasticizer, filler, and curing agent. The resin includes epoxy resin, natural resin, and neoprene. The plasticizer includes dioctyl phthalate. The filler includes inorganic filler and organic filler. The inorganic filler is silica, and the organic filler is fiber. The curing agent is polyurethane. The main component of the silicone rubber sealing ring part 1 is a silicone rubber matrix, which is a polymer formed by connecting silicon and oxygen elements through silicon-oxygen chains. The types of silicone rubber include vinyl silicone rubber and fluorosilicone rubber. The ultraviolet-resistant layer 2 is made of titanium dioxide, and the high-temperature and corrosion-resistant layer 3 is made of fluorinated rubber. The function of the reinforcement layer 4 is to improve the structural strength, compressive strength, and durability of the sealing ring, prevent the silicone rubber sealing ring part 1 from deforming and cracking under high-pressure and dynamic environments. The reinforcement layer 4 helps to improve the tensile resistance and compressive resistance of the sealing ring, ensuring that it will not fail due to external pressure during long-term operation. The sealing layer 401 is pure silicone rubber, and its main function is to provide a sealing function to prevent leakage of liquids and gases. The reinforcement support layer 402 is made of aluminum alloy material and belongs to a high-strength fiber-reinforced composite material. The function of the reinforcement support layer 402 is to provide stronger structural support, maintain the stable shape of the silicone rubber sealing ring part 1, and prevent the silicone rubber sealing ring part 1 from deforming when the temperature changes. The reinforcement support layer 402 can also increase the anti-aging property of the silicone rubber sealing ring part 1 and extend its service life.
[0020] A manufacturing method of a high-temperature and corrosion-resistant silicone rubber sealing ring includes the following steps: The first step: Raw material preparation: Select a high-temperature and corrosion-resistant silicone rubber resin, usually vinyl silicone rubber, and add a reinforcing agent, a vulcanizing agent, a plasticizer, and an ultraviolet-resistant agent to it; The second step: Batching and mixing: Use a mixer to mix, so that each component is evenly distributed in the silicone rubber; The third step: Molding and processing: Place the mixed silicone rubber raw material in a mold and use compression molding or injection molding for processing; The fourth step: Vulcanization treatment: Through the vulcanization reaction, the molecular structure of the rubber cross-links to form a three-dimensional network structure, thereby enhancing its elasticity, heat resistance, and corrosion resistance; The fifth step: Cooling and cutting: After vulcanization is completed, take out the silicone rubber sealing ring from the mold, and through cooling treatment, make it harden and reach the final physical properties. Trim and cut the sealing ring as necessary to ensure accurate dimensions and remove excess materials; The sixth step: Inspection and packaging: The finished silicone rubber sealing ring needs to be subjected to quality inspections, including dimensional inspection, appearance inspection, and temperature and corrosion resistance tests.
[0021] Working principle and usage process of the present invention: The silicone rubber sealing ring is a common sealing element, widely used in environments that require high temperature resistance, aging resistance, and strong weather resistance. It is made of silicone rubber material and has physical and chemical properties. The silicone rubber sealing ring is mainly used to prevent the leakage of liquids and gases, or to protect equipment from dust, dirt, and external pollutants. The silicone rubber sealing ring can withstand high temperatures and can usually work stably in the temperature range of -50°C to +230°C. Silicone rubber has electrical insulation properties and can be used as an electrical seal in the electronics and automotive industries. The silicone rubber sealing ring does not age easily and can provide long-term reliability and sealing effect. In automotive engines, headlights, and cooling system components, the silicone rubber sealing ring is used to seal joints to prevent the leakage of liquids and gases and ensure the normal operation of the equipment. The silicone rubber sealing ring is mainly used to seal joints to prevent the leakage of liquids and gases. Therefore, the sealing ring will be in contact with the sealed medium for a long time. Therefore, it is necessary to enhance the sealing performance and anti-aging performance of the sealing ring to prevent the sealing ring from deforming and cracking. The silicone rubber sealing ring will fail due to external pressure during long-term operation, shortening the service life of the silicone rubber sealing ring. Raw material preparation: Select a silicone rubber resin with high temperature resistance and corrosion resistance, usually vinyl silicone rubber, and add a reinforcing agent, vulcanizing agent, plasticizer, and anti-ultraviolet agent to it. Batching and mixing: Use a mixer to mix, so that each component is evenly distributed in the silicone rubber. The main component of the silicone rubber sealing ring part 1 is the silicone rubber matrix, which is a polymer formed by connecting silicon and oxygen elements through silicon-oxygen chains. The types of silicone rubber include vinyl silicone rubber and fluorosilicone rubber. The anti-ultraviolet layer 2 is titanium dioxide, which has an ultraviolet shielding effect and can effectively protect the silicone rubber from ultraviolet damage. The high temperature and corrosion resistant layer 3 is made of fluorinated rubber material, which is a material with heat resistance and chemical stability and can withstand high temperatures and the corrosion of strong acid and strong base chemical substances. The reinforcing layer 4 is made of a reinforcing fiber material, which can improve the strength, high temperature resistance, and anti-aging performance of the silicone rubber. The role of the reinforcing layer 4 is to improve the structural strength, compressive strength, and durability of the sealing ring, prevent the silicone rubber sealing ring part 1 from deforming and cracking under high pressure and dynamic environments, and the reinforcing layer 4 helps to improve the tensile resistance and compressive resistance of the sealing ring to ensure that it will not fail due to external pressure during long-term operation. The sealing layer 401 is pure silicone rubber, and its main role is to provide a sealing function to prevent the leakage of liquids and gases. The reinforced support layer 402 is made of aluminum alloy material and belongs to a high-strength fiber-reinforced composite material. The role of the reinforced support layer 402 is to provide stronger structural support, maintain the stable shape of the silicone rubber sealing ring part 1, and prevent the silicone rubber sealing ring part 1 from deforming when the temperature changes. The reinforced support layer 402 can also increase the anti-aging performance of the silicone rubber sealing ring part 1 and extend its service life. The protective layer 403 is made of synthetic rubber material, and its main role is to protect the inner layer from damage by the external environment. Molding processing: Place the mixed silicone rubber raw material in a mold and process it using compression molding or injection molding. Vulcanization treatment: Through the vulcanization reaction,The molecular structure of the rubber undergoes crosslinking to form a three-dimensional network structure, thereby enhancing its elasticity, heat resistance, and corrosion resistance. Cooling and cutting: After vulcanization is completed, the silicone rubber sealing ring is removed from the mold and undergoes a cooling process to harden it and achieve its final physical properties. Necessary trimming and cutting are performed on the sealing ring to ensure accurate dimensions and remove excess material. The finished silicone rubber sealing ring needs to undergo quality inspections, including dimensional inspection, appearance inspection, and temperature and corrosion resistance tests.
[0022] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-temperature and corrosion-resistant silicone rubber sealing ring, comprising a silicone rubber sealing ring member (1), characterized in that: The outer surface of the silicone rubber sealing ring part (1) is coated with an ultraviolet-resistant layer (2), and the outer surface of the ultraviolet-resistant layer (2) is coated with a high-temperature and corrosion-resistant layer (3). An enhancing component is arranged inside the silicone rubber sealing ring part (1), and the enhancing component includes an enhancing layer (4), a sealing layer (401), an enhancing support layer (402), and a protective layer (403).
2. The high-temperature and corrosion-resistant silicone rubber sealing ring according to claim 1, wherein: The thickness of the high-temperature and corrosion-resistant layer (3) is greater than that of the ultraviolet-resistant layer (2). The protective layer (403) is arranged on the outer surface of the silicone rubber sealing ring part (1), and the enhancing support layer (402) is arranged inside the silicone rubber sealing ring part (1).
3. The high-temperature resistant and corrosion-resistant silicone rubber sealing ring according to claim 2, characterized in that: The thickness of the protective layer (403) is less than that of the enhancing support layer (402). The sealing layer (401) is bonded to the outer surface of the enhancing support layer (402), and the enhancing layer (4) is bonded to the outer surface of the sealing layer (401).
4. A high-temperature and corrosion-resistant silicone rubber sealing ring according to claim 3, characterized in that: The thickness of the enhancing layer (4) is less than that of the sealing layer (401). The thickness of the sealing layer (401) is equal to that of the enhancing support layer (402). The enhancing components are adhesively bonded to each other layer by layer through an adhesive, and the composition of the adhesive includes resin, plasticizer, filler, and curing agent.
5. A high-temperature and corrosion-resistant silicone rubber sealing ring according to claim 4, characterized in that: The resin includes epoxy resin, natural resin, and chloroprene rubber. The plasticizer includes dioctyl phthalate. The filler includes inorganic filler and organic filler. The inorganic filler is silica, the organic filler is fiber, and the curing agent is polyurethane.
6. A high-temperature and corrosion-resistant silicone rubber sealing ring according to claim 1, characterized in that: The main component of the silicone rubber sealing ring part (1) is a silicone rubber matrix, which is a polymer formed by connecting silicon and oxygen elements through silicon-oxygen chains. The types of silicone rubber include vinyl silicone rubber and fluorosilicone rubber.
7. A high-temperature resistant and corrosion-resistant silicone rubber sealing ring according to claim 6, characterized in that: The ultraviolet-resistant layer (2) is made of titanium dioxide, and the high-temperature and corrosion-resistant layer (3) is made of fluorinated rubber.
8. A manufacturing method of a high-temperature resistant and corrosion-resistant silicone rubber sealing ring, which is applicable to the high-temperature resistant and corrosion-resistant silicone rubber sealing ring described in the above claims 1-7, characterized in that : including the following steps: The first step: Raw material preparation: Select a high-temperature and corrosion-resistant silicone rubber resin, usually vinyl silicone rubber, and add a reinforcing agent, a vulcanizing agent, a plasticizer, and an ultraviolet-resistant agent to it; The second step: Batching and mixing: Use a kneader for mixing to make each component evenly distributed in the silicone rubber; The third step: Molding and processing: Place the mixed silicone rubber raw material in a mold and use compression molding or injection molding for processing; The fourth step: Vulcanization treatment: Through the vulcanization reaction, the molecular structure of the rubber cross-links to form a three-dimensional network structure, thereby enhancing its elasticity, heat resistance, and corrosion resistance; The fifth step: Cooling and cutting: After vulcanization is completed, take out the silicone rubber sealing ring from the mold, and through cooling treatment, make it harden and reach the final physical properties. Trim and cut the sealing ring as necessary to ensure accurate dimensions and remove excess materials; The sixth step: Inspection and packaging: The finished silicone rubber sealing ring needs to be subjected to quality inspection, including dimensional inspection, appearance inspection, and temperature and corrosion resistance tests.