Water-drop type carbon fiber tyre bead core used for tyre and forming method thereof

Abstract

The invention discloses a water-drop type carbon fiber tyre bead core used for a tyre and a forming method of the tyre bead core. The section of the tyre bead core is in a water-drop shape, and the tyre bead core is made of a composite material of carbon fiber bundles coated by a binder. The forming method comprises the following steps: firstly winding the tail end of a continuous carbon fiber composite material tyre bead core strip in an internal hollow cavity of a rotation mold through an opening of the upper part of the mold; and afterwards rotating the rotation mold at a certain speed around a center rotation shaft and continuously delivering the composite material tyre bead core trip of the carbon fiber bundles coated by the binder at the same time so that continuous winding is continuously generated in the hollow cavity of the mold until the carbon fiber tyre bead core having the same water-drop shape with the section of the hollow cavity of the mold is formed. With the adoption of the water-drop type carbon fiber tyre bead core, a tyre bead can be tightly fixed in a wheel rim so that an accident of the wheel rim taking off from the tyre is avoided or the tyre is prevented from slippage or rotation relative to the wheel rim. In addition, the sinking amount of the tyre with the structure can be reduced, and the riding comfortableness and safety are increased.

Description

technical field [0001] The invention relates to a bead of a tire, in particular to a bead core of a water-drop type carbon fiber composite material and a forming method thereof, and the invention is especially suitable for an aircraft tire. Background technique [0002] A tire bead is the area where at least one end of the carcass ply is folded back to form a turn-up carcass after being wound with a hoop, while the bead core is the main component of the hoop around which the carcass ply is wound , is one of the main force-carrying components. On the radially outer side of the bead core, bead apex rubber or other fillers are generally inserted, which are roughly triangular in cross-sectional shape, so as to constrain and fix the bead core. [0003] The tire bead plays an important role in the rotation of the tire, especially the bead core, which not only anchors the tire carcass to the tire bead, but also plays a role in fastening the tire to the rim, thus ensuring The seal...

AI Technical Summary

Problems solved by technology

[0011] In the above-mentioned patents, the tire bead is improved in terms of materials, and composite materials are used to manufacture components such as the bead core. If the bead core is only replaced with a high-modulus composite material, it is difficult to use the composite material in the process of bead processing. The combination of the bead core as the matrix and the rubber-based apex core not only has certain difficulties in the manufacturing process, but also tends to cause relative sliding between the bead core and the apex core, which cannot guarantee the smoothness of the tire from the rim. Good effect in transmitting force and torque to tires

[0012] In addition, the main function of the apex rubber core or bead filler is to fix the bead core inside the bead to prevent it from sliding in the radial direction. There is no guarantee that the bead core made of composite materials will not move radially under the immobilization of the rubber body filler, and may cause a series of failures such as tire detachment from the rim

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