Dual-density mixed in-mold foaming inner tire and production process thereof

Abstract

The invention relates to a double-density mixed in-mold foaming inner tire. The double-density mixed in-mold foaming inner tire comprises a low-density outer layer and a honeycomb inner layer; the honeycomb inner layer is formed by connecting a plurality of honeycomb unit groups distributed in an equal circumference end to end, and each honeycomb unit group is composed of two first honeycomb unitsdistributed in parallel and second honeycomb units arranged on the two sides of the two first honeycomb units respectively. Each of the first honeycomb unit and the second honeycomb unit consists ofa honeycomb high-density outer layer and a honeycomb low-density inner layer; the density of the honeycomb low-density inner layer is 800-900kg / m<3>, the density of the honeycomb high-density outer layer is 1200-1300kg / m<3>, and the density of the honeycomb low-density outer layer is 900-950kg / m<3>. The double-density mixed in-mold foaming inner tire has the advantages that the inner tire is combined with an outer tire for use, and the outer tire obtains relatively high supporting performance while good buffering and shock absorption are guaranteed.

Description

Technical field: [0001] The invention relates to the field of foamed inner tubes, in particular to a double-density mixed-mold foamed inner tube. Background technique: [0002] Pneumatic inner tubes are widely used in all motor vehicles and non-motor vehicles. The technology is mature and has a long history. However, the pneumatic inner tubes often burst after the tire wall is punctured and loses elasticity, and often need to be repaired. Long inner tubes cannot be used normally, which can seriously even lead to car accidents. For this reason, people have developed solid inner tubes that can avoid tire blowouts. The solid inner tube is a solid structure with the entire carcass and does not need to be inflated. If the hardness of the solid inner tube is too high, then Cause motor vehicle or non-motor vehicle to use shock-absorbing effect poor, if solid inner tire is too soft, then can't provide support for motor vehicle or non-motor vehicle. [0003] After searching, the pat...

AI Technical Summary

Problems solved by technology

[0004] 1. The combination of the spring and the low-density inner layer makes the inside of the tire have better cushioning properties. However, during use, the bottom of the ring spring is compressed, and the inside of the spring is deformed. Long-term use will cause a large impact on the low-density inner layer. Abrasion, due to the internal deformation of the spring itself, the connection between the spring and the low-density inner layer and high-density outer layer is easily cracked;

[0005] 2. In addition to the external structural hardness of the tire, the internal protection buffer is relatively large and the flexibility is extremely high. However, after the tire is connected to the wheel hub, during use, the tire is prone to suffocation due to the back pressure of the ground. The support is poor. If you use this kind of tire for a long time, the wheel hub will be easily deformed, and the service life will be greatly shortened.

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