A press-off force enhancing glue bonding process for nylon outer tube rubber bushing
Patent Information
- Application Number
- CN202610931430.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-26
- Publication Date
- 2026-09-25
AI Technical Summary
[0002]目前乘用车副车架衬套、摆臂衬套、扭梁衬套等多种衬套采用尼龙外管与橡胶配合的结构，受尼龙材料本身特性限制，这一种衬套在高低温环境下的压脱力会出现骤降现象，无法满足实际使用需求，现有尼龙外管橡胶衬套在常温环境下压脱力可达10-15KN，但当环境温度高于60℃时，压脱力开始明显下降，且温度越高，压脱力衰减越快、能承受的工作时间越短，当温度达到100℃以上时，压脱力仅能维持在1KN左右，严重影响衬套及对应汽车部件的结构稳定性和使用寿命
（1）首先，本发明制造工艺简单易使用，生产制造完成后的尼龙外管橡胶衬套在-40-110℃宽温域环境下，压脱力可稳定维持在 10KN 以上，彻底解决传统产品高低温下压脱力骤降的问题；
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Figure CN122810720A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive parts processing technology, specifically to a pressure-reinforcing adhesive bonding process for rubber bushings of nylon outer tubes. Background Technology
[0002] Currently, various bushings such as passenger car subframe bushings, swing arm bushings, and torsion beam bushings use a structure of nylon outer tube and rubber. Due to the inherent characteristics of nylon material, the compressive strength of this type of bushing drops sharply under high and low temperature environments, which cannot meet the actual use requirements. Existing nylon outer tube rubber bushings can achieve a compressive strength of 10-15KN at room temperature, but when the ambient temperature is higher than 60℃, the compressive strength begins to decrease significantly. Moreover, the higher the temperature, the faster the compressive strength decays and the shorter the working time that can be withstood. When the temperature reaches above 100℃, the compressive strength can only be maintained at about 1KN, which seriously affects the structural stability and service life of the bushing and the corresponding automotive parts.
[0003] To address the aforementioned issues, two conventional solutions exist in the existing technology, but both have significant drawbacks: one is to use ordinary adhesive for bonding. Ordinary adhesive can only be temporarily applied to the surface of the rubber bushing outer tube during the press-fitting of the subframe bushing. This is difficult to operate, results in uneven coating, and easily causes production line contamination, leading to poor bonding and failing to fundamentally improve the release force. The other solution is to perform shot blasting on the nylon outer tube after the bushing is vulcanized. This increases the release force by increasing the surface roughness of the nylon outer tube. However, the shot blasting process requires additional equipment and manpower, increasing the production cycle and manufacturing costs, and the improvement effect is limited.
[0004] Moreover, the existing bushing press-fit joints are mostly made of steel or aluminum. Neither of the two existing conventional solutions can adapt to the joints made of such materials and the current market demand. Therefore, we propose a press-release force enhanced adhesive bonding process for rubber bushings of nylon outer tubes. Summary of the Invention
[0005] The purpose of this invention is to provide a pressure-reinforcing adhesive bonding process for rubber bushings of nylon outer tubes, so as to solve the problems that need to be solved in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressure-reinforcing adhesive bonding process for rubber bushings of nylon outer tubes, wherein the pressure-reinforcing adhesive bonding process for rubber bushings of nylon outer tubes includes the following steps: Step S1: Pretreatment: Clean the outer surface of the nylon outer tube of the nylon outer tube rubber bushing; Step S2: Applying adhesive: Apply anaerobic adhesive to the pretreated nylon outer tube; Step S3: Baking: Send the glued nylon outer tube into the drying equipment for baking to remove moisture from the nylon bushing and glue. Step S4: Press fitting: Press the baked nylon outer tube into the hand part to obtain the initial rubber bushing; Step S5: Curing: After pressing, the rubber bushing sample is cured in an oxygen-free environment to obtain the nylon outer tube rubber bushing.
[0007] In existing technologies, there are two conventional solutions for bonding nylon outer tube rubber bushings. One is to use ordinary glue for bonding. Ordinary glue can only be temporarily applied to the surface of the rubber bushing outer tube when pressing the bushing onto the subframe. This is difficult to operate, results in uneven coating, and easily causes production line contamination. The bonding effect is poor and cannot fundamentally improve the release force. The second solution is to shot blast the nylon outer tube after the bushing is vulcanized. This increases the release force by increasing the surface roughness of the nylon outer tube. However, the shot blasting process requires additional equipment and manpower, increasing the production cycle and manufacturing costs, and the improvement effect is limited. The manufacturing process of this invention is simple and easy to use. After the nylon outer tube rubber bushing is manufactured, the pressure release force can be stably maintained above 10KN in a wide temperature range of -40-110℃, which completely solves the problem of sudden drop in pressure release force under high and low temperatures of traditional products. The anaerobic adhesive pre-coating process replaces the traditional temporary adhesive application method for press fitting. The coating is uniform and the operation is convenient. It avoids production line pollution caused by adhesive spillage from the source. The bonding stability and strength are significantly better than ordinary adhesives. The shot blasting process after bushing vulcanization is eliminated. There is no need to invest in shot blasting equipment, manpower and consumables. The whole process can be realized by relying on the existing production line. There is no need to add large equipment, which effectively reduces equipment investment, labor costs and production cycle.
[0008] As a further description of the above technical solution: The outer surface cleaning in step S1 includes cleaning impurities from the outer surface and removing oil stains from the nylon outer tube.
[0009] As a further description of the above technical solution: In step S1, oil stains are removed using an ultrasonic cleaner, and impurities are removed using high-pressure air blowing.
[0010] As a further description of the above technical solution: In step S3, the baking temperature is 100±10℃ and the baking time is 10±2min.
[0011] As a further description of the above technical solution: In step S4, the pressing pressure is ≤60KN and the pressing speed is 30mm / s.
[0012] As a further description of the above technical solution: In step S5, the curing time is 24 hours and the curing temperature is 20-25℃.
[0013] As a further description of the above technical solution: The nylon outer tube rubber bushing includes, but is not limited to, swing arm bushing, torsion beam bushing, and subframe bushing.
[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) First, the manufacturing process of this invention is simple and easy to use. After the nylon outer tube rubber bushing is manufactured, the pressure release force can be stably maintained above 10KN in a wide temperature range environment of -40-110℃, which completely solves the problem of sudden drop in pressure release force of traditional products under high and low temperatures. (2) Secondly, the present invention adopts an anaerobic adhesive pre-coating process to replace the traditional press-fit temporary adhesive method. The coating is uniform and the operation is convenient. It avoids production line pollution caused by adhesive spillage from the source. The bonding stability and strength are significantly better than ordinary adhesives. (3) Finally, the present invention eliminates the shot blasting process after the bushing vulcanization, without the need for additional shot blasting equipment, manpower and consumables. The entire process can be realized by relying on the existing production line, without the need for new large equipment, effectively reducing equipment investment, labor costs and production cycle. Attached Figure Description
[0015] Figure 1 This is a structural diagram of the nylon outer tube rubber bushing product of the present invention; Figure 2 This is a schematic diagram of the structure of the nylon outer tube after adhesive coating according to the present invention; Figure 3 This is a schematic diagram of the structure after the bushing of the present invention is pressed into the opposite part; Figure 4 This is a schematic diagram for verifying the bushing pressure of the present invention; Figure 5 This is a curve showing the pressure output force of the bushing in this invention. Detailed Implementation
[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0017] Example 1: Please refer to Figure 1-5 This invention provides a technical solution: a pressure-reinforcing adhesive bonding process for rubber bushings of nylon outer tubes, comprising the following steps: Step S1: Pretreatment: Clean the outer surface of the nylon outer tube of the nylon outer tube rubber bushing. The outer surface cleaning includes cleaning the outer surface impurities and removing the oil stains from the nylon outer tube. The oil stains are removed by ultrasonic cleaning machine, and the impurities are removed by high-pressure air blowing. After removing the surface dust, oil stains and impurities, the tube is dried for later use. This setting can avoid the introduction of impurities during the subsequent glue application process, which will affect the bonding effect. Step S2: Glue Application: Apply anaerobic adhesive to the pretreated nylon outer tube. The anaerobic adhesive, once applied to the surface of the nylon outer tube, will remain liquid even after prolonged exposure to air and will not solidify prematurely. The bushings after glue application and drying have a long effective storage period, allowing for pre-application in batches and stock preparation. This completely solves the problem of rushed, ad-hoc application during traditional glue pressing and avoids premature curing and spoilage of the adhesive. Step S3: Baking: The coated nylon outer tube is placed in a drying equipment for baking. The baking temperature is 100±10℃ and the baking time is 10±2min. This removes moisture from the nylon bushing and the adhesive. This setting can improve the adhesion of the adhesive and prepare for the subsequent curing reaction. The nylon outer tube and the adhesive coating process easily absorb moisture from the air. The anaerobic adhesive also contains trace amounts of solvents and additives. Setting the temperature and baking time during baking can fully evaporate free moisture and low molecular weight volatiles, avoid moisture residue at the bonding interface, and prevent bubbles, delamination, and delamination under high temperature conditions. This ensures the density of the adhesive layer from the root. Moreover, moderate baking can soften and wet the adhesive layer, allowing the anaerobic adhesive to spread fully on the nylon surface, improving the interfacial bonding force and making up for the shortcomings of the nylon outer tube itself being surface inert and difficult to bond. Step S4: Press fitting: Press the baked nylon outer tube into the matching part to obtain the initial rubber bushing. In step S4, the pressing pressure is ≤60KN and the pressing speed is 30mm / s. During the pressing process, ensure that the bushing fits tightly with the matching part so that the anaerobic adhesive on the bushing surface is completely isolated from oxygen. Step S5: Curing: After pressing, the rubber bushing sample is cured in an oxygen-free environment to obtain the nylon outer tube rubber bushing. The curing time is 24 hours and the curing temperature is 20-25℃.
[0018] The nylon outer tube rubber bushing includes, but is not limited to, swing arm bushing, torsion beam bushing, and subframe bushing.
[0019] After the adhesive bonding and pressing are completed, the nylon outer tube rubber bushing is obtained. Compression tests were conducted in environments ranging from -40°C to 110°C, and the results are shown in Table 1 below. Table 1 shows that the 10KN operating condition is met at different temperatures. Table 1
[0020] Example 2: Please refer to Figure 1-5This invention provides a technical solution: a pressure-reinforcing adhesive bonding process for rubber bushings of nylon outer tubes, comprising the following steps: Step S1: Pre-treatment: Clean the outer surface of the nylon outer tube of the nylon outer tube rubber bushing. The outer surface cleaning includes cleaning the outer surface impurities and removing oil stains from the nylon outer tube. The oil stains are removed by ultrasonic cleaning machine, and the impurities are removed by high-pressure air blowing. Step S2: Applying adhesive: Apply anaerobic adhesive to the pretreated nylon outer tube; Step S3: Baking: Send the glued nylon outer tube into the drying equipment for baking to remove moisture from the nylon bushing and glue. The baking temperature is 90℃ and the baking time is 8 minutes. Step S4: Press fitting: Press the baked nylon outer tube into the hand part to obtain the initial rubber bushing. The pressing pressure is ≤60KN and the pressing speed is 30mm / s. Step S5: Curing: After pressing, the rubber bushing sample is cured in an oxygen-free environment to obtain the nylon outer tube rubber bushing. The curing time is 24 hours and the curing temperature is 20℃.
[0021] The nylon outer tube rubber bushing includes, but is not limited to, swing arm bushing, torsion beam bushing, and subframe bushing.
[0022] Example 3: Please refer to Figure 1-5 This invention provides a technical solution: a pressure-reinforcing adhesive bonding process for rubber bushings of nylon outer tubes, comprising the following steps: Step S1: Pre-treatment: Clean the outer surface of the nylon outer tube of the nylon outer tube rubber bushing. The outer surface cleaning includes cleaning the outer surface impurities and removing oil stains from the nylon outer tube. The oil stains are removed by ultrasonic cleaning machine, and the impurities are removed by high-pressure air blowing. Step S2: Applying adhesive: Apply anaerobic adhesive to the pretreated nylon outer tube; Step S3: Baking: Send the glued nylon outer tube into the drying equipment for baking to remove moisture from the nylon bushing and glue. The baking temperature is 110℃ and the baking time is 12min. Step S4: Press fitting: Press the baked nylon outer tube into the hand part to obtain the initial rubber bushing. The pressing pressure is ≤60KN and the pressing speed is 30mm / s. Step S5: Curing: After pressing, the rubber bushing sample is cured in an oxygen-free environment to obtain the nylon outer tube rubber bushing. The curing time is 24 hours and the curing temperature is 25℃.
[0023] The nylon outer tube rubber bushing includes, but is not limited to, swing arm bushing, torsion beam bushing, and subframe bushing.
[0024] Example 4: Please refer to Figure 1-5 This invention provides a technical solution: a pressure-reinforcing adhesive bonding process for rubber bushings of nylon outer tubes, comprising the following steps: Step S1: Pre-treatment: Clean the outer surface of the nylon outer tube of the nylon outer tube rubber bushing. The outer surface cleaning includes cleaning the outer surface impurities and removing oil stains from the nylon outer tube. The oil stains are removed by ultrasonic cleaning machine, and the impurities are removed by high-pressure air blowing. Step S2: Applying adhesive: Apply anaerobic adhesive to the pretreated nylon outer tube; Step S3: Baking: Send the glued nylon outer tube into the drying equipment for baking to remove moisture from the nylon bushing and glue. The baking temperature is 100℃ and the baking time is 10min. Step S4: Press fitting: Press the baked nylon outer tube into the hand part to obtain the initial rubber bushing. The pressing pressure is ≤60KN and the pressing speed is 30mm / s. Step S5: Curing: After pressing, the rubber bushing sample is cured in an oxygen-free environment to obtain the nylon outer tube rubber bushing. The curing time is 24 hours and the curing temperature is 23℃.
[0025] The nylon outer tube rubber bushing includes, but is not limited to, swing arm bushing, torsion beam bushing, and subframe bushing.
[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A pressure-reinforcing adhesive bonding process for rubber bushings of nylon outer tubes, characterized in that: The aforementioned adhesive bonding process for rubber bushings of nylon outer tubes includes the following steps: Step S1: Pretreatment: Clean the outer surface of the nylon outer tube of the nylon outer tube rubber bushing; Step S2: Applying adhesive: Apply anaerobic adhesive to the pretreated nylon outer tube; Step S3: Baking: Send the glued nylon outer tube into the drying equipment for baking to remove moisture from the nylon bushing and glue. Step S4: Press fitting: Press the baked nylon outer tube into the hand part to obtain the initial rubber bushing; Step S5: Curing: After pressing, the initial rubber bushing is cured in an oxygen-free environment to obtain the nylon outer tube rubber bushing.
2. The adhesive bonding process for reinforcing the release force of rubber bushings for nylon outer tubes according to claim 1, characterized in that: The outer surface cleaning in step S1 includes cleaning impurities from the outer surface and removing oil stains from the nylon outer tube.
3. The compressive strength-enhancing adhesive bonding process for rubber bushings of nylon outer tubes according to claim 2, characterized in that: In step S1, oil stains are removed using an ultrasonic cleaner, and impurities are removed using high-pressure air blowing.
4. The adhesive bonding process for reinforcing the release force of nylon outer tube rubber bushings according to claim 3, characterized in that: In step S3, the baking temperature is 100±10℃ and the baking time is 10±2min.
5. The adhesive bonding process for reinforcing the release force of nylon outer tube rubber bushings according to claim 4, characterized in that: In step S4, the pressing pressure is ≤60KN and the pressing speed is 30mm / s.
6. The compressive strength-enhancing adhesive bonding process for rubber bushings of nylon outer tubes according to claim 5, characterized in that: In step S5, the curing time is 24 hours and the curing temperature is 20-25℃.
7. The adhesive bonding process for reinforcing the release force of nylon outer tube rubber bushings according to claim 6, characterized in that: The nylon outer tube rubber bushing includes, but is not limited to, swing arm bushing, torsion beam bushing, and subframe bushing.