The Main Reason for the Failure of Silicone Seals

Although the current level of science and technology is very high, the sealing protection technology of many products still has certain defects in the actual operation process, such as mobile phone waterproof seals, automobile lamp waterproof seals, etc., and the seal material is made of silicone (rubber A type of material) is our most common one. Therefore, as a type of seal used in many aspects, silicone seals often have some unexpected functional problems during normal use, which is difficult to achieve The actual effect, then the silicone single wire seal manufacturer will take you today to understand what are the objective factors that affect it?

(1) Influence of hardness

In many cases, the functionality and structure of the product can be completely changed according to the different softness of the silicone product. Therefore, due to the selection of different softness and hardness of the silicone seal ring during use, the phenomenon of stress, stretching, squeezing, etc. appears. The sealing ring will have some unavoidable problems, such as the extrusion gap, too much force, too high hardness, easy deformation of the product, and no rebound and other factors.

(2) Gap problem

The gap problem can be divided into several factors. One is due to the material rubber problem. Many silicone materials have poor resilience due to the formula, and the problem of insufficient stretching force leads to gaps in the process of use due to low strength. Leakage, the silicone ring manufacturer’s processing problems, such as the product that is brittle, which leads to the thinner curling thickness of the product, is prone to this problem. The soft product causes the rubber to have an inner bulge, which is deformed after long-term stretching and compression. There is a gap problem.

Silicone Weather Pack Seals

(3) Force process

Silicone Weather Pack Seals are generally installed in several places, such as grooves, planes, and convex grooves. The installation method for each product is different. Its stress process will also affect the service life and function of the product. In order to ensure the sealing performance, a reserved position will be made here to distinguish the different usage methods of the silicone rubber sealing ring and the different stress levels. For example, the plane installation can bear the force and the tightness of the deployment. , What is the force degree of the concave and convex types, and the degree of reservation in the selection of the size.

(4) Compression permanent

Another indicator for evaluating the performance of O-ring seals is the compression set of the selected material. Under the action of pressure, the O-ring as an elastic element produces elastic deformation, and with the increase of pressure, permanent plastic deformation will also occur. Generally, in order to prevent permanent plastic deformation, the maximum allowable compression of O-rings is about 30% in static seals and about 20% in dynamic seals. When the silicone seal is installed in the groove, it must be stretched. Or compressed. If the value of tension and compression is too large, it will cause the O-ring cross-section to increase or decrease excessively, because stretching 1% will reduce the cross-section diameter by about 0.5%. For hole sealing, the O-ring is in tension, The allowable tensile force is 6%. For shaft seals, the O-ring is best compressed along its circumference, and the allowable circumference compression is 3%. The stamp itself is relatively cheap. They are fairly easy to operate; they produce very high-quality parts. It still does today!