The oil seal is made of rubber (lip and joint) · spring · metal skeleton.
The cold resistance of the oil seal is determined by the characteristics of the lip material, the characteristics of the sealing medium, the eccentricity of the shaft, Oil Seals the speed at the time of starting, and so on.
Usually the amount of eccentricity of the shaft, due to the amount of oil seal lip to reach the number of% limit, NOK used in the low temperature field, the lip value of the material TR10 value as the reference temperature reference. In the actual use state, for example, there is a temperature lower than the TR10 value, the heat is started after the start, the temperature of the lip end is increased, the rubber elasticity is restored, and the sealing property is maintained. On the other hand there is a higher temperature than the TR10 temperature conditions, the shaft eccentricity larger, lip can not follow the case of leakage. Oil Seals It is dangerous to determine the permissible temperature of the oil seal only with the TR10 value, taking into account the above important factors.
The production process of the oil seal is basically composed of the following six sections: rubber preparation section, mold preparation section, skeleton preparation section; spring preparation section, product vulcanization forming section, post-processing assembly section. Therefore, the basic composition of its process.
In the production of seals, most of the manual labor and increase the cost of the two main processes: 1, vulcanization; 2, inspection.
Oil seal generally refers to the rotating shaft lip seal, also called the shaft seal. In addition, there are reciprocating oil seals, Oil Seals such as shock absorbers oil seal and stem seal. There is also an oil seal between the oil seal and the reciprocating oil seal, that is, the rubber seal has both a rotating and reciprocating skeleton oil seal, such as a hydraulic motor and an ultrahigh pressure oil seal on the direction machine.
There are many forms of oil seal, in addition to within the package skeleton oil seal, exposed skeleton oil seal, as well as the assembly of double skeleton oil seal. In addition, no skeleton rubber oil seal, no spring-type oil seal also belongs to the range of oil seals. The process flow chart can remove the skeleton, adhesive, spring or an unnecessary process link. In addition, some oil seals, such as the assembly of exposed rubber seal, but also in the dressing when the assembly. And some even in the metal skeleton of the side wall painting; Oil Seals some oil seal should be in the abundance of lip between the injection of grease.
For some special occasions, the use of oil seals, such as reciprocating oil seals that require improved wear resistance and reduced friction coefficient, Oil Seals should also be halogenated in the halogenated liquid prior to hanging the spring, and some oil seals, such as the AF pad, PTFE film, it should also be added in the process of Teflon surface treatment and bonding process.