Patent ID: 6514441
Filing Date: 2003-02-04
Classification: B29D

Abstract:
A radial tire manufacturing method comprising the steps of:(a) measuring an radial run-out (RRO) waveform of each green tire; (b) recording an average waveform component of radial force variation (RFV) of a molding factor in each molding machine for molding a green tire, and an average waveform component of RFV of a vulcanization factor in each vulcanizer for vulcanizing a green tire, in a computer; (c) synthesizing an RFV composite waveform including the sub-steps of: (1) converting an RRO waveform of each green tire into an RFV waveform component; and (2) superpositioning the recorded average waveform components of RFV of the molding factor and the vulcanization factor on the converted RFV waveform component; (d) selecting a circumferential position on a green tire at which an amplitude of said RFV composite waveform becomes minimum, and a circumferential position in said vulcanization mold; and (e) vulcanizing the green tire including the sub-steps of: (1) positioning said circumferential position on the green tire to said circumferential position in said vulcanization mold; and (2) loading said green tire in said mold.