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What causes the distortion of silicone rubber O-rings

Release time:

2021-01-22 16:52

Source:

Dongguan Mingzhen

During the vulcanization of rubber sealing rings, what are the reasons for the poor performance of rubber sealing rings caused by silicone key manufacturers? For example, the vulcanization working time of rubber sealing rings is insufficient or the vulcanization working temperature is not up to standard, that is, the vulcanization degree is insufficient (also known as sulfur deficiency), and the physical properties of the sealing products are not reached by seals, such as low hardness, low strength, elongation and large deformation, elasticity and other characteristics can not normally play (show the inherent ability) advantages, which has a greater relationship with the degree of sulfur, silicone products silicone raw material rubber products according to the performance can be divided into ordinary silicone and meteorological silicone.

The physical property of the rubber sealing ring becomes lower, which affects the rubber material characteristics of the sealing member. The silicone raw materials of silicone products can be divided into ordinary silicone and rubber key meteorological silicone according to their performance. Subsequent observation can be made through the vulcanization curve. If the torque has been on the rise with the increase of time, the hardness of the sulfur-bearing rubber material is larger than that of the positive vulcanization. If the torque has a downward trend with the increase of time.

Silicone rubber O-ring distortion refers to the phenomenon of O-ring twisting along the circumferential direction. The distortion phenomenon generally occurs in the dynamic sealing state. Silicone products are mainly used for molded products, such as silicone sleeves, silicone products, silicone tableware, silicone keys, etc. Liquid silicone is mainly used for extruded products, such as silicone nipples, silicone tubes, etc.

I would like to tell you the reasons that may cause the distortion and damage of the silicone rubber O-ring. One of the main reasons for the silicone key is that the gap between the piston, the piston rod and the cylinder barrel is uneven, the eccentricity is too large, and the cross-sectional diameter of the O-ring is uneven. Some parts of the rubber O-ring rub too much and twist occurs.

Sealing ring.

Second, the rubber O-ring with a small cross-sectional size is also prone to uneven friction, resulting in distortion of the silicone rubber O-ring.

Third, the deviation of the coaxiality of the sealing groove, the unequal sealing height and the uneven cross-sectional diameter of the rubber O-shaped liquid silicone ring may cause one part of the rubber O-ring to compress too much and the other part to be too small or not to be compressed, thus causing distortion. The cold resistance of the O-shaped ring: the ordinary rubber is delayed to -20 silicone product factory -30, I .e. silicone rubber still has good elasticity at -60-70, some specially formulated silicone rubbers can also withstand extremely low temperatures.

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