O-shaped rubber sealing rings are widely used in various mechanical equipment, and play a sealing role in different temperatures, pressures and media to prevent oil leakage, air leakage, water leakage and intrusion of external environmental media and dust in mechanical equipment. The O-ring rubber seal is a rubber product with a circular cross-sectional area. Its applications are in the fields of chemical industry, machinery, coal, petroleum, metallurgy, transportation, household appliances and so on.