The sealing ring is a common tool, commonly used in automobile engine, to the inner bearing seal effect, of course, to maintain the online LED dispensing operation of the engine also need to use the sealing ring, the sealing ring must have the general characteristics of high elasticity and stable performance, and has the characteristics of no pollution of engine parts etc. so, to seal the demand is higher, and always maintain a constant electric dispensing confidential work, the pressure of the sealing ring as can be imagined, so often need to change the seal ring of the engine, we can use more durable rubber sealing ring to increase the use of cycle. Dispensing needle is also commonly used to dispensing consumables, on-line LED dispensing machine continues to perform high strength work will be a burden on the needles, because the dispenser continued to pull back will gradually smooth dispensing dispensing needle tip portion, leading to a hard rubber. Some glue with more or less corrosive, the corrosive glue long in the needle part flow will gradually produce erosion of the needle, these adverse effects are more difficult to control real-time live, so the operator burden is heavy.