Abstract:
A method of manufacturing a laminated mold having a laminated layer sheet (11) formed of a plurality of sheets (11a) stacked on each other, comprising the steps of stacking the sheets (11a) so that the side thereof coming into contact with a tire tread can have an excess wall over the shape of a tire crown part, removing the excess wall, fitting the laminated sheet (11) to a holder to form a sector mold, and arranging the plurality of sector molds along the circumferential direction of the tire to form the laminated mold having an annular tread pattern forming part, whereby it can be suppressed that the profile of the tire is formed in a stepped shape against the original profile of the tire.
Abstract:
A tire manufacturing method, comprising the steps of, when a green tire is molded, moving a toroidally expandable toroidal molding drum through a distance between a plurality of working stations at a specified tact time, disposing a carcass band and both bead cores on the drum in any working station and locking the bead cores, increasing the diameter of the molding drum, toroidally extending the carcass band between both bead cores, and rolling up the side portion of the carcass band around the bead cores in the outer radial direction, assembling tire component members with the bead cores locked to the toroidal molding drum and molding the green tire, and reducing the diameter of the molding drum, unlocking the bead cores, and removing the green tire from the molding drum, whereby the tires of a plurality of sizes can be sequentially molded, a conventional tire structure must not be largely changed, and an energy and time can be prevented from being wastefully consumed.
Abstract:
A tire molding drum and a tire molding method capable of accurately assembling tire component members, the tire molding drum comprising at least one core body having a plurality sheets of rigid support members disposed in an annular shape on the axial inside of a pair of bead lock means and displaceably expanded and contracted; the method comprising the steps of, by using the tire molding drum, locking bead cores by the bead lock means, swelling the center part of a carcass band while displacing the bead lock means close to each other, folding up the side part of the carcass band to the radial outer side around the bead cores, increasing the diameters of the core bodies to the maximum diameters with the bead cores locked, and assembling the tire component members on the diametrally increased core bodies.
Abstract:
A tire molding system having no possibility of prolonging the tact time for tire molding, not requiring a special installation space for endless circulation travel of a molding carriage, and having no danger of increasing noise and vibration or of early deterioration of carriage positioning accuracy. A tire molding system comprising work stations for assembling tire components on a molding drum, a molding carriage supporting the molding drum to move it to the respective work stations, and carriage guide means for guiding the movement of the molding carriage in a predetermined path, wherein the carriage guide means includes wheels disposed on two inner and outer endless rails and on the molding carriage and adapted to roll on the opposite side surfaces of the endless rails so as to regulate the carriage position in a direction orthogonal to the direction of extension of the endless rails, each endless rail being composed of a linear portion and an arcuate portion, the two portions being smoothly connected, the rail width (W) of the arcuate portion being narrower than the rail width of the linear portion.
Abstract:
PROBLEM TO BE SOLVED: To provide a reel delivery mechanism capable of easily and securely delivering a reel held by a holding means provided on one side in an axial direction of the real around which a wire is wound to a holding means provided on another side.SOLUTION: A reel delivery mechanism 1 includes: first and second holding means 20R, 20L including multiple engagement members 22P, 22Q, a spring member 23 as an energization member which energizes front end parts of the multiple engagement members on a side of a reel 10 to an opposite direction from a center between multiple engagement members 22P, 22Q, engagement projections 22b provided to each of multiple engagement members 22P, 22Q on the side of the reel 10, and a supporting shaft which is provided between front end parts and rear end parts of the engagement members 22P, 22Q and supports the engagement members 22P, 22Q in a rotatable way; and the real 10 having a cylindrical shaft member 12 in which through-holes 12h as engagement recessed parts engaging with the engagement projections 22b are formed on a side of the first and the second holding means 20R, 20L.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a device for buff-polishing an inner surface of an annular member such as an annularly-formed precure tread uniformly and without any excess or deficiency.SOLUTION: An inner peripheral surface of a precure tread 20 defining an annular member is subjected to buff polishing in which the precure tread 20 is supported and rotated by a plurality of rollers 11A, 11B, and 12, and wire brushes 13A, 13B being buffing members are pressure-received by the inner surface of the rotating precure tread 20 while rotating them, the inner surface of the precure tread 20 is buff-polsihed, and the rollers 11A, 11B, and 12 and the wire brushes 13A, 13B are arranged in a case 4, and buffing powder for the precure tread 20 is sucked by a suction hose 5b and fed to and collected in a suction device 5.
Abstract:
PROBLEM TO BE SOLVED: To provide a printing apparatus that prints a linear image pattern on the side face part of a tire, and a printing method.SOLUTION: A printing apparatus 1 includes: a holding means of holding a tire T; a rotation means of rotating the tire T around the rotation axis of the tire T; and a printing means of performing printing on the side face part of the tire T by ejecting ink from an ink head 13. Predetermined printing is performed by ejecting the ink while rotating the tire T. The printing apparatus 1 is equipped with an image conversion means of converting image data input in the form of an orthogonal coordinate system to a polar coordinate system having the center of a circle in the axial center of rotation of the tire T.
Abstract:
PROBLEM TO BE SOLVED: To clearly print characters, pictures and the like on a tire surface without the need for troublesome labor.SOLUTION: A tire printing device 1 includes: print heads 3 and 4 that discharge and apply paint to the tire surface; width direction shifting parts 6 and 7 that shift the print heads 3 and 4 along the width direction X of the tire T; radial direction shifting parts 9 and 10 that shift the print heads 3 and 4 along the radial direction Y of the tire T; and oscillation parts 12 and 13 that make the print heads 3 and 4 oscillate around the axis Z1 of the tire T in the circumferential direction Z.
Abstract:
PROBLEM TO BE SOLVED: To form a highly accurate unvulcanized tire.SOLUTION: The apparatus 1 for manufacturing an unvulcanized tire includes: an extruder 2; a rotatably supported drum 3; a plurality of conveyors 4, 5 which convey a rubber member extruded from the extruder 2 to the drum 3; and a cutting means 6 which cuts a tip side of the rubber member from the rubber member to form a tire-constituting member on the plurality of conveyors 4, 5 where a feeding conveyor 5 located at the most downstream side in the conveyance direction among the plurality of conveyors 4, 5 winds the tire-constituting member to the outer circumferential surface 3b side of the drum 3 by rotation of the drum 3 while feeding the tire-constituting member to the drum 3, thereby forming an unvulcanized tire. The apparatus 1 for manufacturing the unvulcanized tire further includes: a shape measuring means 8 for measuring a cross-sectional shape of the rubber member on the plurality of conveyors 4, 5; and a control part 12 which controls the ratio of the feeding conveyor speed of the feeding conveyor 5 to the rotation speed of the drum 3 based on the data of the cross-sectional shape measured by the shape measuring means 8.
Abstract:
PROBLEM TO BE SOLVED: To provide a pneumatic tire manufacturing method capable of preventing an increase in tire weight to effectively prevent contamination of the color of a color rubber material used as side wall ornamentation or character information display of the pneumatic tire, or the tread wear indicator of a tread region.SOLUTION: The disclosed pneumatic tire manufacturing method includes a step of forming a composite rubber material (1) comprising two or more types of rubber material including a color rubber material (1a) having a color different from the rubber material that is black in color due to carbon black, and a rubber coating material (1b) coating the color rubber material (1a).