Sealing rubber rings have their presence in various industries, especially in our electronic products. As a sealing, dustproof, and waterproof material, it has become one of the irreplaceable materials. Therefore, more and more products will be customized according to their own product appearance. However, some complex and varied design structures still have a certain impact on the waterproof interference fit, deformation, and shrinkage of the product. So, what issues should we pay attention to when customizing sealing rings?
Firstly, the structure and size of the product are closely related. In the field of silicone sealing rings, due to the inability to control the dimensional tolerances of silicone products to be very precise, all products in the silicone ring field need to be appropriately reduced to ensure their assembly tightness. If the size of the product is relatively small, the interference fit required for its size and assembly position can be appropriately reduced. However, if the product is relatively large, both shrinkage and size need to be made larger during the manufacturing process.
The inner diameter is designed to fit the sealing groove, which may loosen and fail to achieve a complete sealing effect. Therefore, it is necessary to ensure the normal tolerance range and expansion range of the size during design. When designing the mold, the overall inner diameter needs to be reduced to achieve a tight sealing effect by squeezing and shrinking under force. Secondly, there are issues related to the material of the product, such as the softness and hardness of the material. The softness and hardness of silicone seals under different forces can affect the sealing performance of the product. If the material hardness is too high, it may cause the sealing ring to deform under long-term stress, leading to leakage and loosening.
If the hardness of the product is too low during assembly, it is due to the influence of force, back and forth friction, or problems such as flipping and displacement during assembly, resulting in poor fit or insufficient tightness during assembly, which affects the service life. So the material selection of the sealing ring is quite important, in addition to its softness and hardness, it also has a significant impact on its material, such as tensile strength, friction resistance, and deformation rebound strength, such as high tensile silicone, oil emitting silicone, high rebound silicone, and other different types of rubber.
The precision in the production and processing process also needs to be prevented and controlled, such as the precision of the mold and the thickness of the fractal line. For silicone rings that are relatively precise and small, strict control is required over their cloaking, self-healing, and processing dimensions.
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