Tire and tire manufacturing method

Abstract

The present invention provides a tire configured by joining together tire forming members consisting of a thermoplastic material, wherein the joined sections have sufficient strength. A molten thermoplastic material (43) for welding is extruded toward the portions to be joined of two half tire bodies (17A) which are butted against each other face to face and consist of a first thermoplastic material, and one half tire body (17A) and the other half tire body (17A) are welded together by the thermoplastic material (43) for welding. The half tire bodies (17A) are welded together without melting the half tire bodies (17A), and as a result, the thermoplastic material which forms the half tire bodies (17A) is prevented from degrading and the joined portions have sufficient strength.

Description

technical field [0001] The present invention relates to a tire mounted on a rim and a method of manufacturing the tire, and more particularly to a tire at least partially formed of thermoplastic material and a method of manufacturing the tire. Background technique [0002] Conventionally, for vehicles such as passenger cars, pneumatic tires made of rubber, organic fiber materials, steel wire members, and the like are used. [0003] However, there is a limit to the use of recycled rubber, and the used rubber is treated for heat recovery by incineration, pulverization, and use as a road paving material. [0004] In recent years, it has been demanded to use thermoplastic resins, thermoplastic elastomers, and the like as tire materials from the viewpoint of easy weight reduction and recycling. [0005] For example, Patent Document 1 discloses a pneumatic tire molded using a thermoplastic polymer material. [0006] Patent Document 1: Japanese Patent Laid-Open No. 03-143701 [...

AI Technical Summary

Problems solved by technology

[0010] However, if the molded tire sheet is heated again to melt it, the joint portion is heated for a long time, and the material strength of the solidified portion after melting may be lower than that of other parts due to thermal deterioration, and the strength of the joint portion is unsatisfactory. Worry

[0011] In addition, it is difficult to make the ends of the tire pieces overlap each other with high precision and overlap one turn before joining with a mold.

[0012] In addition, since the periphery of the joining part is melted, it is necessary to use a joining die to form the joining part, and there is a problem of increasing the number of dies

[0013] In addition, in order to suppress unevenness of the joint part, the semi-circular tire piece joint part is made into an asymmetric shape, so there is a problem that the types of molds increase (need two kinds of molds)

Images