Method of manufacturing pneumatic tire

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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Details

156123, B60C 918, B29D 3020

Patent

active

049433318

ABSTRACT:
To improve high speed durability or prevent tire ribs and/or blocks from being peeled off at high speed travel, a tread rubber member whose outer surface is formed into corrugation shape along tire axial direction, when seen in cross section, is prepared to form a green tire so that radially convex portions thereof may be located under tire circumferential grooves to be formed after vulcanization process and radially concave portions thereof may be located under tire ribs and/or blocks also to be formed after vulcanization process. Since the rubber flow rate of the tread rubber member under the circumferential grooves is relatively larger, when the green tire is vulcanized, the belt layers are conversely deformed into radially concave shape under the circumferential grooves. When the vulcanized tire is inflated with air or rotated at high speed, since the belt layers are returned to a flat shape and further the ribs and/or blocks are deformed into radially concave shape, it is possible to reduce a rise in temperature at the central portion of each of ribs and/or blocks.

REFERENCES:
patent: 4007069 (1977-02-01), Takayanagi et al.
patent: 4152191 (1979-05-01), Olsen
patent: 4308083 (1981-12-01), Toth, Jr.

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