CBD.SEALS

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Automotive

  • CBD.SEALS
  • Automotive

    • Seals in the automotive industry sector are key components that ensure the safe, reliable and efficient operation of automobiles under various operating conditions. Automotive seals are widely used in engines, transmissions, suspension systems, braking systems, body structures and other parts of the vehicle, and they must be able to maintain their performance under different temperatures, pressures, speeds and chemical environments.

    Types of seals

    Static seals: used for sealing between fixed parts, such as fuel tank cover, engine cover, door seals and so on.

    Dynamic seals: used for sealing between relatively moving parts, such as pistons and cylinders, shafts and bearings.

    Rotary seals: specially used for sealing rotating shafts, such as crankshaft oil seals, hub oil seals and so on.

    Material selection

    Rubber seals: such as nitrile rubber (NBR), fluorine rubber (FKM), silicone rubber (VMQ), EPDM, etc., with good elasticity and oil resistance.

    Metal seals: such as stainless steel, copper, aluminum, etc., suitable for high temperature and high pressure environment.

    Composite seals: combining the advantages of metal and rubber, such as metal-coated rubber, filled polytetrafluoroethylene (PTFE), etc.

    Design requirements

    Temperature resistance: able to maintain performance in extreme temperatures, from cold winters to hot summers.

    Pressure resistance: able to maintain a seal in high-pressure environments, such as inside engines and transmissions.

    Chemical resistance: able to resist corrosion from chemicals such as fuels, lubricants, coolants, etc.

    Abrasion Resistance: Ability to resist abrasion and maintain long-term sealing performance in moving parts.

    Reliability: During the design life, the seal must maintain its function without leakage.

    Manufacturing process

    Molding: applicable to the manufacture of rubber and certain composite seals.

    Machining: applicable to the manufacture of metal seals.

    Injection molding: applicable to the manufacture of certain plastic seals.

    Testing and verification

    Leakage test: Leakage testing through media such as water or oil to ensure that the seals are leak-free.

    Environmental testing: Testing the performance of seals in simulated automotive operating environments, such as high temperature, low temperature and vibration.

    Life test: Evaluate the service life of seals through accelerated aging test.

    Application Examples

    Engine seals: including cylinder gaskets, piston rings, crankshaft oil seals, etc. to prevent fuel and lubricant leakage.

    Transmission Seals: Ensure that the transmission works properly under high pressure without leakage.

    Brake system seals: prevent brake fluid leakage and ensure the reliability of the braking system.

    Body seals: such as seals for doors, windows and sunroofs to prevent rain and dust from entering the car.