Silicone sealing ring is widely used in dynamic sealing in the fields of machinery, automobile, electronics, medical, etc. due to its good elasticity, high and low temperature resistance, aging resistance and other characteristics. However, the dynamic sealing environment is complex, and the compression and rebound performance of the sealing ring is extremely high. How to optimize the compression and rebound performance of silicone sealing ring to meet the needs of dynamic sealing has become an urgent problem to be solved.
The performance of silicone material directly affects the compression and rebound performance of the sealing ring. Selecting silicone material with high elasticity and low compression permanent deformation is the basis. For example, silicone with a special molecular structure can be selected, which has a large cross-linking density between molecular chains and can provide better rebound performance. In addition, by adding nanofillers, plasticizers, etc., the mechanical properties of silicone can be further improved and its compression and rebound ability can be improved.
Reasonable formula design is the key to optimizing the performance of silicone sealing ring. In the formula, the proportions of silicone matrix, fillers, vulcanizers, accelerators and other components need to be balanced. Increasing the amount of fillers can increase the hardness and strength of the sealing ring, but may reduce its elasticity; while reducing the amount of fillers can increase elasticity, it may sacrifice some strength. Therefore, a large number of experiments are needed to find the best formula combination to achieve the optimization of compression rebound performance.
The manufacturing process has an important influence on the performance of silicone sealing ring. The use of advanced molding processes, such as injection molding, compression molding, etc., can ensure the dimensional accuracy and shape stability of the sealing ring. At the same time, optimizing the vulcanization process parameters, such as vulcanization temperature, time, pressure, etc., can fully vulcanize the silicone and form a stable cross-linked structure, thereby improving its compression rebound performance. In addition, post-treatment processes such as secondary vulcanization and surface treatment can also further improve the performance of the sealing ring.
Reasonable structural design can significantly improve the compression rebound performance of silicone sealing ring. For example, the use of special shapes such as wavy and serrated sealing rings can provide a larger deformation space during compression, release stress, and thus improve the rebound performance. In addition, optimizing the cross-sectional shape and size of the sealing ring to better match it with the sealing groove can also reduce the risk of leakage and improve the sealing effect.
The use environment of silicone sealing ring has an important influence on its compression rebound performance. In harsh environments such as high temperature, high pressure, and corrosive media, the performance of the sealing ring will be significantly reduced. Therefore, necessary protective measures need to be taken, such as selecting high temperature resistant and corrosion resistant silicone materials, or coating a protective layer on the surface of the sealing ring. At the same time, control the use of temperature, pressure and other parameters to avoid the sealing ring being in extreme working conditions for a long time.
The optimized silicone sealing ring needs to undergo rigorous testing and verification to ensure that it meets the dynamic sealing requirements. The test content includes compression permanent deformation test, rebound performance test, sealing performance test, etc. Through the test data, evaluate whether the performance indicators of the sealing ring meet the expected requirements. If the requirements are not met, further adjustments and optimizations need to be made to the materials, formulas, processes, etc.
To optimize the compression rebound performance of the silicone sealing ring to meet the dynamic sealing requirements, it is necessary to start from multiple aspects such as material selection, formula design, manufacturing process, structural design, use environment control, and testing and verification. Through comprehensive measures, the performance and reliability of the silicone sealing ring can be significantly improved to meet the strict requirements in dynamic sealing scenarios.
