Repair method of rubber profile with fabric on hollow closed surface

Abstract

The invention provides a method for repairing a rubber profile with a fabric on a hollow closed surface. The method comprises the following steps: preparing a repairing material, cleaning and drying, polishing and protecting, sewing, determining an external expansion area, cutting a repairing strip, laminating, heating, pressurizing and the like. The method has the characteristics that the operation is simple, the product does not need to be completely disassembled, the damaged rubber profile can be quickly repaired, manpower and material resources are remarkably saved in practical application, and the assembly efficiency of a user is greatly improved; for a large profile which is dozens of meters and even hundreds of meters long, the technology can ensure excellent sealing performance on the basis of keeping the original structure of the profile. According to the airtight test verification, the repaired product can meet the airtight requirement, the repaired part does not have the abnormal conditions such as falling or cracking, the reliability is high, and the service life of the rubber profile is effectively prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber material repair, and in particular relates to a method for repairing a hollow closed surface rubber profile with fabric. Background Art

[0002] With the rapid development of the rubber industry, rubber products have been widely used in many fields. Among them, hollow closed surface fabric rubber profiles have become important functional materials due to their high strength, good wear resistance, and excellent airtightness and watertightness. They are widely used in sealing and shock absorption. However, during the installation and use of such rubber profiles, due to improper operation or accidental scratches, cuts and other factors, they may be damaged, affecting the normal function of the product and even causing serious air or water leakage. Therefore, how to efficiently and reliably repair such rubber profiles has become a technical problem that needs to be solved urgently.

[0003] Existing repair methods mainly include two categories: 1. Sealant repair method. For minor damage (such as scratches less than 5mm), sealant gluing or glue pouring is usually used for repair. This method works well when dealing with small-scale damage, but it is difficult to meet the requirements for areas with larger damage (for example, the length is between 5mm and 100mm). Especially on hollow profiles with complex structures, glue pouring can easily increase the weight of the profile, and may even cause the sealant to remain in the hollow part, affecting the original function of the product. In addition, under the action of external forces, the repaired part may be damaged again. 2. High-temperature hot vulcanization repair method. This method repairs the damaged part through high-temperature hot vulcanization, and the repair effect is good, but the repair process is relatively complicated. First, the damaged profile needs to be disassembled and transported to the repair plant for operation. Especially for profiles that are tens of meters or even hundreds of meters long, disassembly and transportation are difficult. This not only prolongs the repair cycle, but may also affect the user's assembly progress and cause economic losses.

[0004] In summary, the existing repair technology has deficiencies in terms of scope of application, ease of operation and economy, which limits the widespread application of hollow closed surface with fabric rubber profiles. Therefore, there is an urgent need for a technical solution that can quickly and efficiently repair large-area damage without complete disassembly, in order to make up for the defects of the existing technology and improve the repair efficiency and reliability. Summary of the invention

[0005] The invention provides a repair method for a hollow closed surface rubber profile with fabric, aiming to solve the problems of complex operation and low efficiency of the existing repair method.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A method for repairing a hollow closed surface with a fabric rubber profile, comprising the following steps:

[0008] Prepare repair materials: prepare rubberized fabric repair strips, pure rubber repair strips, suture needles and suture threads;

[0009] Cleaning and drying: Use deionized water or alcohol to clean the damaged surface of the hollow closed surface with fabric rubber profile, and use hot air to dry it to obtain repair area I;

[0010] Grinding and protection: Grinding the surface of the repair area I and performing protective treatment on the surrounding area;

[0011] Suturing: Suturing along the outer side of the repair area I to connect and fix the damaged part to form area II;

[0012] Determine the outward expansion area and cut the repair strips: take the area II as a reference, expand outward to form area III, and cut the rubberized fabric repair strips and the pure rubber repair strips according to the size of the area III;

[0013] Lamination: first lay and compact the pure rubber repair strip on the surface of area III, then laminate the rubberized fabric repair strip on the pure rubber repair strip, and finally laminate another pure rubber repair strip on the rubberized fabric repair strip and compact and exhaust;

[0014] Heating and pressurizing treatment: Heat and apply pressure to the bonded repair strip to make the repair material fit tightly with the original rubber profile and complete the repair.

[0015] Furthermore, the preparation of the adhesive-coated fabric repair strip comprises: subjecting the fabric to a viscosity-increasing treatment, coating it with an adhesive paste prepared from a rubber mixture and an organic solvent, and drying it;

[0016] The preparation of the pure rubber repair strip comprises: using an open mixing mill to press the mixed rubber into sheets and then cutting the sheets into sheets, and the thickness of the pure rubber repair strip is 0.3 mm to 0.6 mm.

[0017] Further, the preparation of the adhesive-coated fabric repair strip comprises:

[0018] The fabric is immersed in a silicon-containing polymer viscosity-enhancing treatment liquid, and then taken out and dried;

[0019] The mixed rubber and the organic solvent are mixed in a weight ratio of 1:3 to 1:5 to obtain a glue slurry, and the glue slurry is applied on the surface of the fabric 2 to 3 times.

[0020] Furthermore, the length of the suture needle is 30 mm to 70 mm, and the diameter is 0.2 mm to 1.2 mm; the material of the suture thread is the same as the fabric material of the hollow closed surface with fabric rubber profile.

[0021] Furthermore, in the cleaning and drying steps, the drying temperature used is between 40° C. and 60° C., and the drying time is 5 min to 15 min.

[0022] Furthermore, in the suturing step, an "8"-shaped suturing method is used to align the two damaged ends and sew them in place to prevent the damaged area from sprouting and expanding again.

[0023] Furthermore, in the bonding step, when the pure rubber repair strip and the rubber-coated fabric repair strip are overlapped, air bubbles are expelled by applying pressure, so that each layer is tightly bonded.

[0024] Furthermore, in the heating and pressurizing treatment step, the temperature range of the heating treatment is 80°C to 150°C, and the heating time range is 5min to 30min; while the heating treatment, a positive pressure of 0.05MPa to 0.2MPa is applied and maintained for 5min to 30min.

[0025] Furthermore, in the polishing and protection steps, the polishing sandpaper used has a mesh size of 180 to 400.

[0026] Furthermore, in the laminating step, the edges of the rubber-coated fabric repair strip and the pure rubber repair strip are staggered by 2 mm to 5 mm, so that a stepped overlapping structure is formed between the layers of repair strips.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention provides a simple and efficient method for repairing hollow closed surface rubber profiles with fabric, which significantly improves the repair efficiency and reduces the operation complexity; the method does not need to rely on specialized sites and large equipment, and maintenance personnel can quickly complete the repair on site, shortening the maintenance time and reducing the downtime cost; by adopting a composite structure of a rubber-coated fabric repair strip and a pure rubber repair strip that is highly matched with the original material, not only the elasticity, wear resistance and sealing performance of the rubber profile are restored, but also secondary damage is effectively prevented, and the structural strength and durability of the repair area are enhanced; the method is suitable for rubber profiles of various sizes, especially local repair of large profiles, avoiding the complexity and high cost of complete disassembly and transportation to other places, and improving the economy and convenience of maintenance; in addition, the present invention is conducive to industrial production and application, convenient for field operations, and the optimized material ratio and process parameters ensure the full fusion and firm bonding of the repair material and the substrate, improve the repair quality, increase the service life of the rubber profile, and reduce material waste and environmental pollution.

[0029] Of course, the implementation of the various technical solutions of the present invention does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0031] Figure 1 Schematic diagram of the cross-sectional structure of an intact Ω-shaped hollow closed surface with fabric rubber profile according to an embodiment of the present invention;

[0032] Figure 2 Schematic diagram of the local defect structure of the Ω-shaped hollow closed surface with fabric rubber profile in the embodiment of the present invention;

[0033] Figure 3 yes Figure 2 A simplified schematic diagram of the defective structure cross section;

[0034] Figure 4 This is a simplified schematic diagram of the stitching of the first embodiment of the present invention;

[0035] Figure 5 It is a simplified schematic diagram of the bonding of Example 1 of the present invention;

[0036] Figure 6 It is a flow chart of the method of embodiment 1 of the present invention. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0038] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0039] See also Figure 1 , Figure 2 and Figure 3 As shown, embodiments 1-3 of the present invention are described by taking a hollow closed surface with fabric rubber profile of Ω-shaped cross section as an example. Figure 1 It is a schematic diagram of the intact cross-section structure of the Ω-shaped hollow closed surface with fabric rubber profile, showing the overall structural characteristics of the profile; Figure 2 This is a schematic diagram of the defective cross-sectional structure of the profile that is partially cut due to external force during use, showing the damage location and the impact of the damage on the sealing performance; Figure 3 A simplified schematic diagram of the defect cross section.

[0040] Embodiment 1:

[0041] This embodiment provides a method for repairing a hollow closed surface rubber profile with fabric, comprising the following steps: Figure 6 :

[0042] Step S1: Material selection and preparation:

[0043] Step S101, preparing the glue-coated fabric repair strip:

[0044] The fabric is made of polyester fabric with a warp and weft density of 300×300 threads / 10cm;

[0045] The fabric was immersed in a silicone polymer thickening treatment liquid for 30 minutes, and then taken out and dried at room temperature (25°C);

[0046] Mix the rubber compound (silicone rubber, Mooney viscosity of about 40MU) and the organic solvent in a weight ratio of 1:3.0, and stir in a blender until the rubber compound is fully dissolved to obtain a slurry;

[0047] Use a brush to apply the glue on the fabric surface twice, with an interval of 5 minutes between each application. The final coating thickness is about 0.3 mm. Place it at room temperature and let it air for 24 hours to obtain a glue-coated fabric repair strip.

[0048] Step S102: preparing a pure rubber repair strip:

[0049] The mixed silicone rubber with the same formula is pressed into sheets through an open mill, and the thickness is controlled at 0.5mm;

[0050] Cut the sheet into repair strips of the required size.

[0051] Step S103: Prepare suture needle and suture thread

[0052] The suture needle is 50 mm long and 0.8 mm in diameter;

[0053] The material of the suture thread is the same as the polyester fabric mentioned above, and the thread diameter is 0.4 mm.

[0054] Step S2: Cleaning and drying:

[0055] Use alcohol to wipe and clean the damaged surface of the rubber profile for about 3 minutes to remove oil and debris;

[0056] Set the temperature of the hot air gun to 40°C and dry the cleaned area I for about 10 minutes.

[0057] Step S3, polishing and protection:

[0058] Use sandpaper with a mesh size of 180 to lightly sand area I (the damaged area and the surrounding extension area) to remove surface oxides and rough parts;

[0059] Protective treatment: Attach protective tape to the repair area I and its outer periphery to prevent the glue or rubber material from overflowing to the non-repaired area during subsequent bonding or heating; it can also prevent external impurities from contaminating the repair surface again.

[0060] Step S4: Suturing:

[0061] Use an "8"-shaped suture method to align and fix the two ends of the damaged area. The suture length is slightly longer than the damaged length and extends 3 mm on both sides to form area II.

[0062] Step S5, determine the outward expansion area and cut the repair strip:

[0063] Taking area II as the reference, expand outward by about 5mm to 6mm to obtain area III;

[0064] According to the actual size of area III, cut the rubber-coated fabric repair strip and the pure rubber repair strip respectively. The length and width are slightly larger than area III by 1mm to 2mm to ensure that the damaged area can be completely covered when fitted.

[0065] Step S6: Lamination

[0066] First, lay the pure rubber repair strip flat on the surface of area III and apply moderate pressure on it to expel bubbles;

[0067] Place the rubber-coated fabric repair strip tightly against the pure rubber repair strip, flatten it, and then overlap it with another layer of pure rubber repair strip, with the edges staggered by about 2mm so that the three layers form a stepped overlapping structure, ensuring that bubbles are expelled from each layer and that they are firmly stacked.

[0068] Step S7: heating and pressurizing

[0069] Adjust the hot plate temperature to 80°C, apply a positive pressure of 0.05 MPa while heating for 10 min and maintain for 10 min;

[0070] After heating is completed, allow the repaired area to cool naturally and remove the protective tape.

[0071] The following relevant tests were conducted on the repaired rubber profile of this embodiment, and the test data and performance verification are as follows:

[0072] Air tightness test: Take the repaired sample that has been naturally cooled for 48 hours, place it in an air pressure environment of 0.05MPa for 30 minutes, and check whether there are bubbles or pressure drops in the damaged area and its surroundings; the test results show that there is no gas leakage and the sample maintains good air tightness.

[0073] Adhesion strength test: The 180° peel strength test method was used to test the bonding strength between the repair strip and the rubber substrate. The average peel strength was found to be approximately 1.3 kN / m. No falling off or cracking of the repair strip occurred in either the short-term (24 h) or medium-term (7 d) tests.

[0074] Appearance quality: The surface of the repaired area is flat, the edges are smooth and the transition with the original rubber substrate is natural, without obvious protrusions or wrinkles.

[0075] In summary, this embodiment adopts relatively low temperature (80°C) and low pressure (0.05MPa) to meet the repair needs of small-scale damage. The repaired product shows good reliability and consistency in terms of air tightness, strength and appearance quality.

[0076] Embodiment 2:

[0077] Step S1: Material selection and preparation

[0078] Step S101, preparing the glue-coated fabric repair strip:

[0079] The fabric is made of nylon 66 fiber fabric with a warp and weft density of 250×250 strands / 10cm;

[0080] The fabric was immersed in a silicon-containing polymer viscosity-enhancing treatment liquid for 20 minutes, and then taken out and naturally dried at 25°C;

[0081] Select a mixed silicone rubber with a Mooney viscosity of about 50MU, mix it with an organic solvent at a weight ratio of 1:4.5, and stir until it is evenly dissolved to obtain a slurry;

[0082] Use a scraper to apply coating on the fabric surface three times, with an interval of 5 minutes between each coat, and the total coating thickness is about 0.35 mm; after leaving it at room temperature for 24 hours, the glue-coated fabric repair strip is obtained.

[0083] Step S102: preparing a pure rubber repair strip:

[0084] The same formula is used to mix silicone rubber and press it into sheets through an open mixer with a thickness controlled at 0.3mm;

[0085] Cut the sheet into a patch strip size that matches the intended repair area.

[0086] Step S103: Prepare suture needle and suture thread:

[0087] The suture needle is about 40 mm long and 0.5 mm in diameter;

[0088] The suture material is the same as nylon 66 fiber fabric, and the wire diameter is about 0.3mm.

[0089] Step S2: Cleaning and drying:

[0090] Clean the damaged area with deionized water for 3 minutes and wipe it dry with a rag;

[0091] Set the temperature of the hot air gun to 50°C and dry the cleaned area I for 8 minutes to ensure that there is no residual moisture.

[0092] Step S3, polishing and protection:

[0093] Use 320-grit sandpaper to polish Area I (the damaged area and the surrounding extension area); focus on polishing the damaged edge to make it smooth;

[0094] After grinding, stick 5mm wide protective tape around the repair area to prevent material overflow or impurities from invading during subsequent bonding and heating.

[0095] Step S4: Suturing:

[0096] Use the "8" shape to align the two ends of the damaged area and suture them. The suture line can be appropriately extended to 3mm outside the damaged area to form area II.

[0097] See also Figure 4 A small amount of glue can be applied to the suture nodes to enhance the adhesion between the knot and the substrate.

[0098] Step S5, determine the outward expansion area and cut the repair strip:

[0099] With area II as the center, it expands outward by about 4 mm to form area III;

[0100] According to the length and width of area III, the rubber-coated fabric repair strip and the pure rubber repair strip are cut respectively so that their size is 1 mm to 2 mm larger than that of area III.

[0101] Step S6: Lamination:

[0102] First, apply the pure rubber repair strip and compact the exhaust;

[0103] Then attach the rubberized fabric repair strip;

[0104] Finally, apply another layer of pure rubber repair strip and stagger the edges of the three layers by about 3mm to ensure that there are no bubbles in each layer and they are tightly bonded. Figure 5 .

[0105] Step S7: heating and pressurizing:

[0106] The repaired area was placed on a 120°C hot plate and heated for 15 min, while a 0.1 MPa positive pressure was applied and maintained for 15 min;

[0107] After heating, cool naturally, remove the protective tape and the repair is completed.

[0108] The following relevant tests were conducted on the repaired rubber profile of this embodiment, and the test data and performance verification are as follows:

[0109] Air tightness: Maintaining pressure for 30 minutes at 0.06MPa air pressure, no gas leakage;

[0110] Peel strength: The 180° peel strength test value is about 1.5 kN / m, which is slightly improved compared with Example 1;

[0111] Appearance inspection: The three layers of repair strips are tightly bonded, the surface is smooth without obvious wrinkles, and the overall transition is good.

[0112] Embodiment 3:

[0113] Step S1: Material selection and preparation:

[0114] Step S101, preparing the glue-coated fabric repair strip:

[0115] The fabric is a blend of aramid fiber and polyester fiber, with a density of 300×280 strands / 10cm;

[0116] Soak the fabric in a silicone polymer thickening treatment solution for 25 minutes, then take it out and dry it at 25°C;

[0117] Select a mixed silicone rubber with a Mooney viscosity of about 60MU and mix it with an organic solvent at a weight ratio of 1:3.5 to prepare a slurry;

[0118] Use a brush to apply two times on both sides of the fabric, with a single-side coating thickness of about 0.25 mm. After leaving at room temperature for 24 hours, the glue-coated fabric repair strip is obtained.

[0119] Step S102: preparing a pure rubber repair strip:

[0120] The same formula of mixed rubber (silicone rubber) was pressed into a sheet with a thickness of 0.6 mm on an open mixing mill;

[0121] Cut the repair strip to a size slightly larger than the expected damage area.

[0122] Step S103: Prepare suture needle and suture thread:

[0123] Suture needle length 70mm, diameter 1.0mm;

[0124] Use polyester fiber suture thread with a diameter of 0.5mm.

[0125] Step S2: Cleaning and drying:

[0126] Pre-clean the surface with a 1:1 mixture of alcohol and neutral detergent for 2 minutes, then wipe it again with alcohol for 1 minute;

[0127] Set the temperature of the hot air gun to 60°C and dry for 10 minutes to obtain area I.

[0128] Step S3, polishing and protection:

[0129] Use 400-grit sandpaper to sand area I to ensure that the damaged edges and transition areas are smooth;

[0130] Stick a protective film around it and use a dust-free cloth to remove the dust generated after sanding to prevent subsequent poor bonding.

[0131] Step S4: Suturing:

[0132] Use the "8" shaped suture method to align the two ends of the damaged area and suture them to form area II;

[0133] If the damaged length exceeds 10 mm, 2 to 3 more stitches can be extended outside the suture line for reinforcement.

[0134] Step S5, determine the outward expansion area and cut the repair strip:

[0135] Taking area II as the base, it expands outward by about 7 mm to form area III;

[0136] Cut the rubberized fabric repair strips and pure rubber repair strips separately so that they can completely cover area III and provide sufficient overlap margin.

[0137] Step S6: Lamination:

[0138] First apply the first layer of pure rubber repair strip, and then apply the rubberized fabric repair strip after the bubbles are removed;

[0139] Then overlap with another layer of pure rubber repair strip, with the edges of the three layers staggered by 2 to 5 mm to ensure that each layer fits well.

[0140] Step S7: heating and pressurizing:

[0141] Set the hot plate temperature to 150°C, heat the repair area for 5 minutes, and apply a positive pressure of 0.2 MPa for 5 minutes;

[0142] After turning off the heat, let it cool naturally, remove the protective film and tape, and the repair is complete.

[0143] The following relevant tests were conducted on the repaired rubber profile of this embodiment, and the test data and performance verification are as follows:

[0144] Air tightness: No leakage was found in the 0.08MPa air pressure test for 30 minutes and the room temperature water immersion test;

[0145] Peel strength: 180° peel strength is about 1.6kN / m;

[0146] Durability: After 7 days of observation, there is no cracking or bulging at the interface between the repair strip and the original rubber, and the repaired part remains intact.

[0147] The test data show that all embodiments of the present invention have good performance in air tightness, peel strength and appearance, and can meet the repair needs of hollow closed surface rubber profiles with fabric in various application scenarios. Compared with the prior art, the technical solution of the present invention mainly solves the following problems: 1. The method of the present invention is not limited by the site and equipment, has strong adaptability, does not require large equipment such as a flat vulcanizer, and does not require complete disassembly of the product. For profiles that are tens of meters or even hundreds of meters long, only the damaged section needs to be disassembled, and the repair can be completed on the airborne, and the repair time is short, which improves the work efficiency of the user; 2. The preparation process of the method of the present invention is simple, which is conducive to industrial production and application, convenient for field operations, and avoids the problems of product transportation, assembly, debugging and long repair cycle in different places; 3. The method of the present invention uses a pre-treated rubber repair strip similar to the material of the rubber profile, and the rubber itself has a certain viscosity, which avoids the influence of the use of foreign adhesives on the profile, reduces complicated processes, and at the same time improves the adhesion and compatibility between the repair strip and the profile, further enhancing the sealing performance of the product after repair. 4. The product repaired by the method of the present invention is verified by airtightness test to meet the original sealing performance and other load-bearing capacity of the product, and no abnormal phenomena such as falling off and cracking occur at the repaired position, and the reliability is high, thereby extending the service life of the rubber profile.

[0148] In summary, the method of the present invention has the advantages of flexible operation, adaptability to various forms of damage, high repair efficiency, etc. in actual engineering applications, and can restore the sealing and use performance of rubber profiles in a relatively short period of time. For large profiles that are tens of meters or even hundreds of meters long, the method of the present invention can keep the original structure of the product unchanged and still have good sealing performance. Technicians can adjust parameters and replace materials according to actual needs to achieve better repair effects.

[0149] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. A method for repairing a hollow closed surface fabric rubber profile, characterized in that: The following steps are involved: Prepare repair materials: prepare rubberized fabric repair strips, pure rubber repair strips, suture needles and suture threads; Cleaning and drying: Use deionized water or alcohol to clean the damaged surface of the hollow closed surface with fabric rubber profile, and use hot air to dry it to obtain repair area I; Grinding and protection: Grinding the surface of the repair area I and performing protective treatment on the surrounding area; Suturing: Suturing along the outer side of the repair area I to connect and fix the damaged part to form area II; Determine the outward expansion area and cut the repair strips: take the area II as a reference, expand outward to form area III, and cut the rubberized fabric repair strips and the pure rubber repair strips according to the size of the area III; Lamination: first lay and compact the pure rubber repair strip on the surface of area III, then laminate the rubberized fabric repair strip on the pure rubber repair strip, and finally laminate another pure rubber repair strip on the rubberized fabric repair strip and compact and exhaust; Heating and pressurizing treatment: Heat and apply pressure to the bonded repair strip to make the repair material fit tightly with the original rubber profile and complete the repair.

2. The method for repairing a hollow closed surface rubber profile with fabric according to claim 1, characterized in that: The method of preparing the adhesive-coated fabric repair strip comprises: subjecting the fabric to a viscosity-enhancing treatment, coating the fabric with an adhesive paste prepared from a mixed rubber and an organic solvent, and drying the adhesive paste; The preparation of the pure rubber repair strip comprises: using an open mixing mill to press the mixed rubber into sheets and then cutting the sheets into sheets, and the thickness of the pure rubber repair strip is 0.3 mm to 0.6 mm.

3. The method for repairing a hollow closed surface rubber profile with fabric according to claim 2, characterized in that: The preparation of the adhesive-coated fabric repair strip comprises: The fabric is immersed in a silicon-containing polymer viscosity-enhancing treatment liquid, and then taken out and dried; The mixed rubber and the organic solvent are mixed in a weight ratio of 1:3 to 1:5 to obtain a glue slurry, and the glue slurry is applied on the surface of the fabric 2 to 3 times.

4. The method for repairing a hollow closed surface rubber profile with fabric according to claim 1, characterized in that: The length of the suture needle is 30 mm to 70 mm, and the diameter is 0.2 mm to 1.2 mm; the material of the suture thread is the same as the fabric material of the hollow closed surface with fabric rubber profile.

5. The method for repairing a hollow closed surface rubber profile with fabric according to claim 1, characterized in that: In the cleaning and drying steps, the drying temperature used is between 40° C. and 60° C., and the drying time is 5 min to 15 min.

6. The method for repairing a hollow closed surface rubber profile with fabric according to claim 1, characterized in that: In the suturing step, an "8"-shaped suturing method is used to align the damaged ends and sew them in place.

7. The method for repairing a hollow closed surface rubber profile with fabric according to claim 1, characterized in that: In the laminating step, when the pure rubber repair strip and the rubber-coated fabric repair strip are overlapped, air bubbles are expelled by applying pressure, so that each layer is tightly attached.

8. The method for repairing a hollow closed surface rubber profile with fabric according to claim 1, characterized in that: In the heating and pressurizing treatment step, the temperature range of the heating treatment is 80° C. to 150° C., and the heating time range is 5 min to 30 min. During the heating treatment, a positive pressure of 0.05 MPa to 0.2 MPa is applied and maintained for 5 min to 30 min.

9. The method for repairing a hollow closed surface rubber profile with fabric according to claim 1, characterized in that: In the polishing and protection steps, the polishing sandpaper used has a mesh number of 180-400.

10. The method for repairing a hollow closed surface rubber profile with fabric according to claim 1, characterized in that: In the laminating step, the edges of the rubber-coated fabric repair strip and the pure rubber repair strip are staggered by 2 mm to 5 mm, so that a stepped overlapping structure is formed between the layers of repair strips.

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