What is the function of a flap?
1 Answers
Flap is used to protect the inner tube from being worn by the rim or pinched between the rim and the tire bead. Flap: The flap is an annular rubber strip with a certain cross-sectional shape. The inner tube valve passes through the round hole on the flap to protect the inner tube from wear. It is installed between the inner tube and the rim, with the middle part being thicker and the edges gradually thinning from the inside to the outside. There is a center line on the outer surface of the flap, which serves as an alignment line during installation. There is also a hole on the center line for the inner tube valve to pass through. The flap does not require high physical and mechanical properties of the rubber material, but it should have good aging resistance. Types of flaps: According to the cross-section, they can be divided into concave and flat types. The former is more convenient to assemble and easier to position correctly. It is widely used in automobile pneumatic tires.