固定密封用的○形圈,即使在螺栓扭力不大时,也能在很大的温度、压力和公差范围内严密地密封。对于大多数的固定密封装置来说,都可以买到现成标准○形圈。但是往往有些须用专用模具加工的特殊尺寸的○形圈,却是不容易买到的,为了满足特殊尺寸的○形圈的需要,可以把高精度公差模压或挤压成型的橡胶绳切成所需要的尺寸,加以拚接和硫化处理,从而可以省去加工专用模具所需要的时间和费用。经硫化处理的拚接接头很牢固,尺寸同○形圈的其余部分一样。 O-rings for fixed seals are tightly sealed over a wide range of temperatures, pressures and tolerances, even when the bolt torque is low. For most fixed seals, off-the-shelf standard o-rings are available. However, some special size o-rings that are to be machined with special molds are not readily available. In order to meet the requirement of o-rings of special sizes, high-precision tolerance molded or extruded rubber cords can be cut into The required size, to splicing and curing, which can save the time and cost of processing special mold. The vulcanized splices are very strong, the same size as the rest of the o-ring.