Butt joint gap sealing method

Abstract

The invention discloses a butt joint gap sealing method, which relates to the technical field of sealing, and comprises the following steps: S1, forming a semi-cured sealing rubber strip with a smooth and flat surface on one side and a non-smooth and flat surface on the other side by utilizing the characteristic that a sealant is cured to generate bubble holes; s2, preparing a sealant; s3, the non-smooth flat face of the semi-solidified sealing rubber strip is connected to the butt joint gap in a gluing mode through the prepared sealing glue solution; s4, curing of the semi-cured sealing rubber strip and the sealing glue solution is completed, and sealing is completed; the semi-cured sealing rubber strip with one smooth and flat face and the other non-smooth and flat face is actively manufactured through the sealant, then the non-smooth and flat face is used as the gluing face for gluing, the gluing area is increased, the gluing quality can be improved, the sealing life can be prolonged along with improvement of the gluing quality, and the service life of the semi-cured sealing rubber strip is prolonged. In addition, the smooth and flat surface is used as the outer surface, so that the attractiveness is improved, and the sealing position has a better streamline.

Description

Technical Field

[0001] The invention relates to the technical field of sealing, and in particular to a method for sealing a butt joint gap. Background Art

[0002] Sealant is often used to seal the joint gap between two parts. Under normal circumstances, it is only necessary to apply sealant to the joint gap and wait for the sealant to solidify to form a sealing strip to complete the sealing of the joint gap. However, some sealants have gas inside, and small holes will be formed on their outer surface after normal application and curing. For example, in the aviation field, there will be a joint gap between the rubber protector of the leading edge of the propeller blade and the paint layer of the blade body. It is necessary to use a three-component room temperature vulcanizing sealant to apply and seal, and keep it in a natural state for curing. However, in the actual sealing process, it is found that after the three-component room temperature vulcanizing sealant is applied evenly, a large number of pinhole defects will be generated on the surface during the curing process. This defect is a characteristic of the material itself. The reason is that the gas inside the sealant is slowly discharged during the room temperature vulcanization process, and pinholes are formed after the glue liquid is cured.

[0003] Therefore, people are in urgent need of a butt joint gap sealing method with long sealing life and smooth outer surface. Summary of the invention

[0004] The purpose of the present invention is to provide a method for sealing a butt joint gap to solve the problems existing in the above-mentioned prior art, and to make full use of the non-flat surface of the semi-cured sealing strip as the bonding surface, which not only improves the bonding quality and increases the sealing life, but also keeps the outer surface flat and smooth.

[0005] To achieve the above object, the present invention provides the following solution: The present invention provides a method for sealing a butt joint gap, comprising the following steps:

[0006] S1: Using the property of air bubbles produced by the curing of sealant, a semi-cured sealant strip is formed with one side being smooth and flat and the other side being non-smooth and flat;

[0007] S2: prepare sealant;

[0008] S3: The non-smooth flat surface of the semi-cured sealing strip is glued to the joint gap through the configured sealing liquid;

[0009] S4: The semi-cured sealing strip and the sealing liquid are cured and the sealing is completed.

[0010] Preferably, the sealant used in step S1 is a multi-component room temperature vulcanizing sealant.

[0011] Preferably, the non-smooth flat surface of the semi-cured sealing strip is a plane with pinhole-shaped defects.

[0012] Preferably, in step S1, the semi-cured sealing strip is a sealing strip that is not completely cured and after the gas in the sealant has been discharged.

[0013] Preferably, in step S1, a carrier having a smooth and flat bearing surface that is not bonded to the sealant is used as a molding carrier for the semi-cured sealant strip.

[0014] Preferably, the molding carrier is made of silicone rubber.

[0015] Preferably, in step S1, the width of the semi-cured sealing strip is greater than the width of the butt joint gap.

[0016] Preferably, in step S1, two blocking members are arranged in parallel on the supporting surface of the molding carrier for molding the semi-cured sealing strip, the spacing between the two blocking members is the same as the width of the semi-cured sealing strip to be molded, and the thickness of the two blocking members is the same as the thickness of the semi-cured sealing strip to be molded.

[0017] Preferably, the blocking member is an adhesive tape.

[0018] Preferably, in step S3, the bend of the butt joint gap is butt-sealed by two semi-cured sealing strips.

[0019] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0020] Use sealant to actively make a semi-cured sealing strip with one side smooth and the other side non-smooth, and then use the non-smooth surface as the bonding surface for bonding. The bonding area is increased, which is beneficial to improving the bonding quality. As the bonding quality improves, the sealing life will also increase. In addition, using the smooth surface as the outer surface not only improves the aesthetics, but also makes the seal more streamlined. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 Flow chart of a method for sealing a butt joint gap in an embodiment of the present invention;

[0023] Figure 2 This is a structural schematic diagram of the present invention using the butt joint gap sealing method in the embodiment to complete the butt joint gap sealing;

[0024] Among them, 1. Fully cured sealing strip; 2. Butt joint gap. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a method for sealing a butt joint gap to solve the problems existing in the prior art and make full use of the non-flat surface of the semi-cured sealing strip as the bonding surface, which not only improves the bonding quality and increases the sealing life, but also keeps the outer surface flat and smooth.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Please refer to Figure 1 , Figure 2 As shown, a method for sealing a butt joint gap is provided, comprising the following steps:

[0029] S1: utilizing the property of the sealant to produce air bubbles during curing, the configured sealant is formed on a molding carrier into a semi-cured sealant strip having a smooth flat surface on one side and a non-smooth flat surface on the other side (the non-smooth flat surface is formed due to the air bubbles formed by the discharge of gas during the curing process of the sealant). The semi-cured sealant strip is a sealant strip that has not been completely cured and the gas in the sealant has been discharged. The semi-cured sealant strip is a sealant strip that is slightly sticky;

[0030] S2: preparing sealant. The sealant in this step is newly prepared, and the sealant that has been prepared for a period of time in step S1 is not used;

[0031] S3: The non-smooth flat surface of the semi-cured sealing strip is connected to the joint gap 2 through the configured sealant. The non-smooth flat surface is used as the bonding surface for bonding. The bonding area is increased, which is beneficial to improving the bonding quality. As the bonding quality improves, the sealing life will also increase. In addition, the smooth flat surface is used as the outer surface, which not only improves the aesthetics, but also makes the sealing part have a better streamline shape.

[0032] S4: Wait for the semi-cured sealing strip and the sealing liquid to be cured to form a fully cured sealing strip 1, and the sealing is completed.

[0033] The sealant used in step S1 of the present embodiment is a three-component room temperature vulcanizing sealant, which is suitable for the aviation field. In other embodiments, the required type of sealant can be selected according to the usage scenario.

[0034] In this embodiment, the non-smooth flat surface of the semi-cured sealing strip formed by the three-component room temperature vulcanizing sealant is a plane with pinhole-shaped defects. The gas inside the sealant is slowly discharged during the room temperature vulcanization process to form a pinhole-shaped structure.

[0035] To form a semi-cured sealing strip with a smooth surface on one side, it is necessary to use a carrier with a smooth and flat surface that does not adhere to the sealant as a forming carrier for the semi-cured sealing strip in step S1. The non-adhesive property is to ensure that the slightly sticky semi-cured sealing strip can be easily removed.

[0036] In this embodiment, the material of the molding carrier is silicone rubber, and the molding carrier is made of silicone rubber as a whole. In other embodiments, other materials that do not adhere to the sealant can be selected to make the molding carrier according to the type of sealant, or a bearing layer formed by a material that does not adhere to the sealant can be formed on the surface of the molding carrier.

[0037] During actual sealing, the width of the semi-cured sealing strip produced in step S1 is greater than the width of the butt joint gap 2, so that during sealing, the semi-cured sealing strip seals the butt joint gap 2 in a covering manner, thereby improving the sealing effect.

[0038] In step S1, two blocking members are arranged in parallel on the supporting surface of a molding carrier for molding a semi-cured sealing strip, the spacing between the two blocking members is the same as the width of the semi-cured sealing strip to be molded, and the thickness of the two blocking members is the same as the thickness of the semi-cured sealing strip to be molded, so as to facilitate molding of a semi-cured sealing strip of a required size.

[0039] The blocking member may be made of a material that is not sticky to the sealant, may be integrally provided with the molding carrier, or may be connected to the molding carrier.

[0040] In this embodiment, the blocking member is a tape, which can be directly attached to the molding carrier. When the semi-cured sealing strip to be molded is thicker, a thicker tape can be selected, or multiple layers of tape can be attached to adjust the thickness. The use of tape has the advantages of easy connection and removal, and the size of the semi-cured sealing strip to be molded can be adjusted at any time.

[0041] In step S3, the bending part of the butt joint gap 2 is butt-sealed by two semi-cured sealing strips, and there is no need to form a semi-cured sealing strip with a bending point, thereby improving the convenience of forming the semi-cured sealing strip.

[0042] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0043] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0044] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for sealing a butt joint gap, characterized in that: The following steps are involved: S1: Using the property of air bubbles produced by the curing of sealant, a semi-cured sealant strip is formed with one side being smooth and flat and the other side being non-smooth and flat; S2: prepare sealant; S3: The non-smooth flat surface of the semi-cured sealing strip is glued to the joint gap through the configured sealing liquid; S4: The semi-cured sealing strip and the sealing liquid are cured and the sealing is completed.

2. The method for sealing a butt joint gap according to claim 1, characterized in that: The sealant used in step S1 is a multi-component room temperature vulcanizing sealant.

3. The method for sealing a butt joint gap according to claim 2, characterized in that: The non-smooth flat surface of the semi-cured sealing strip is a plane with pinhole-shaped defects.

4. The method for sealing a butt joint gap according to claim 3, characterized in that: In step S1 , the semi-cured sealing strip is a sealing strip that is not completely cured and the gas in the sealant has been discharged.

5. The method for sealing a butt joint gap according to claim 1, characterized in that: In step S1, a carrier having a smooth and flat bearing surface that is not bonded to the sealant is used as a molding carrier for the semi-cured sealant strip.

6. The method for sealing a butt joint gap according to claim 5, characterized in that: The material of the molding carrier is silicone rubber.

7. The method for sealing a butt joint gap according to claim 1, characterized in that: In step S1 , the width of the semi-cured sealing strip is greater than the width of the butt joint gap.

8. The method for sealing a butt joint gap according to claim 1, characterized in that: In step S1, two blocking members are arranged in parallel on the supporting surface of a molding carrier for molding a semi-cured sealing strip, the spacing between the two blocking members is the same as the width of the semi-cured sealing strip to be molded, and the thickness of the two blocking members is the same as the thickness of the semi-cured sealing strip to be molded.

9. The method for sealing a butt joint gap according to claim 8, characterized in that: The blocking member is an adhesive tape.

10. The method for sealing a butt joint gap according to claim 1, characterized in that: In step S3, the bend of the joint gap is butt-sealed with two semi-cured sealing strips.

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