BEAD RING, AND TIRE VULCANIZATION MOLD USING SAME

• Main Author: ASANO KENZO
• Format: Patent
• Language: English
• Published: 04.07.2013
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a technique which eliminates need for a troublesome step change of bead rings, absorbs an elongation in size of a bladder due to increase in its use, keeps an actual periphery length constant, increases the regular times of use of the bladder and improves the productivity of tire vulcanization operation.SOLUTION: A bead ring has: a circular ring base; and a spacer which is attachable/detachable to/from an inner side surface of the ring base in a tire axis direction and has a shape protrudent inward in the tire axis direction. The spacer has: an inclined surface inclined inward in a radial direction and extended inward in the tire axis direction; vertical surface vertically extended outwards in the tire axis direction from a top of the inclined surface; a protrusion H with a height H of 15-30 mm; and a top formed in an arc with a curvature radius R of 7-10 mm in a cross section including the tire axis. A tire vulcanization mold is provided with the bead ring.