Patent ID: 7820000
Filing Date: 2010-10-26
Classification: B29D

Abstract:
1. A method for producing a tire provided with a bead core and a carcass extending toroidally between each of bead cores with a side portion folded back outward in the radial direction around the bead core, wherein: an estimation formula is prepared in advance for estimating a primary harmonic component in the waveform of a radial force caused in a produced tire by a mutual positional deviation or an angular deviation between the axis of a carcass member and the axis of the bead core when the bead core is set on the outer periphery of the carcass member or a primary harmonic component in the waveform of radial runout in a green tire caused by this deviation; a single cycle of the radial force of the produced tire or radial runout of the green tire is measured and an inversed waveform with the primary harmonic component inversed is obtained for the measured waveform itself or treatment waveform in which predetermined numerical value treatment is applied to the measurement waveform of the radial force of the produced tire; the mutual positional deviation or the angular deviation between the axis of the carcass member and the axis of the bead core causing this inversed waveform is obtained thereafter by backward calculation of the estimation formula when a tire of the same size is to be molded with a molding machine which molded this tire; and the bead core is set on the carcass member by changing the position or angle of the axis of at least one of the bead cores in the obtained deviation direction by an obtained deviation size.