| 摘要 |
There are provided a method for manufacturing a tire which can suppress residual air and occurrences of bares, flow cracks and the like, which cause a reduction of the durability of a product tire, by flattening a stepped part formed at an overlapping portion of a tire component member under pressure to optimize a cross sectional shape of the overlapping portion, and an apparatus used for this method. The apparatus ( 1 ) comprises a building platform ( 2 ), a rubber strip extruder ( 3 ), and a pressing roller ( 4 ). A specified tire component member is formed by spirally winding a ribbon-shaped rubber strip 5 extruded by the rubber strip extruder ( 3 ) while making an overlapping portion to apply it on the building platform ( 2 ). A stepped part ( 8 ) of the overlapping portion ( 7 ) exposed to the outer surface of the tire component member is flattened under pressure by the pressing roller ( 4 ) which is arranged to face the building platform with a specified slip angle alpha with reference to the extending direction of the applied rubber strip ( 5 ) and which is heated up to a plasticizing temperature region to smoothen the outer surface of the tire.
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