Identification line coating device and method of manufacturing pneumatic tire

Abstract

PROBLEM TO BE SOLVED: To provide a color line coating apparatus and a pneumatic tire manufacturing method in which meandering and bending of a color line due to fitting failure with a rim is not generated, and a merit of a strip wind method is exhibited fully without requiring a large installation place and a separate process and more efficient tire manufacturing can be implemented, upon providing a color line to a tire manufactured by using the strip wind method.SOLUTION: A color line coating apparatus is a coating apparatus of a color line for a tread surface of a raw cover manufactured by using a strip wind method, and comprises a transfer ring which is arranged on a shaping former which holds and rotates the raw cover with a specified distance from the outer periphery part of the shaping former, a line coating apparatus which coats with paint the tread surface of the raw cover which is held at the inner periphery side of the transfer ring and rotates and transfer ring moving means for moving the transfer ring in a width direction of the raw cover.

Description

technical field [0001] The present invention relates to an identification line coating device and a method of manufacturing a pneumatic tire using the identification line coating device. Background technique [0002] In recent years, as a method of manufacturing tires, the following method has been widely used: a method of winding a narrow rubber belt (rubber strip) in a spiral shape to form rubber members such as tread rubber to manufacture green tires (unvulcanized tires) method. [0003] When manufacturing such tires, in general, in the case of lateral stacking, etc., in order to easily identify the size and type of tires, etc., an identification line is provided in the circumferential direction of the tread surface of the raw tire, In the above-mentioned tape winding method, since the tread is formed by winding in a helical shape, it is difficult to apply the identification line when manufacturing the green tire, and the identification line is applied to the vulcanized ...

AI Technical Summary

Problems solved by technology

[0007] In addition, since such identification line coating process is set as a dedicated identification line coating process after the vulcanization process, it is unavoidable to increase the size of the device, and it is necessary to secure a sufficiently wide installation place accordingly.

However, such an additional process and a wide installation space are also major factors that hinder the advantages of the tape winding method that can realize miniaturization by winding rubber tapes and sequentially forming rubber members and stacking them.

[0008] In addition, in order to form the identification line on the tire after vulcanization, there is no other method than using a spray gun to apply the paint

However, paint clogging tends to occur in spray guns, and as a result, there is a problem that paint costs increase

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