Abstract: The invention can firmly and easily remove a finely divided weft piece without leaving the weft piece by constituting a method and an apparatus of removing weft from a cord fabric for a topping sheet in a calender line for topping rubber on a number of pieces of aligned cords by a calender roll. In the midst of transferring a cord fabric transferred to a calender apparatus, weft is finely divided by passing the cord fabric through weft dividing means, thereafter, a plurality of blades arranged movably in a width direction on an upper face side of the cord fabric are reciprocally moved in the width direction over an entire width thereof to be brought into contact with the cord fabric, and the divided weft piece is wiped off to remove by respectively striking respective cords of the cord fabric by the respective blades.

Abstract: The invention can efficiently provide a carcass member constituting a carcass layer of a radial tire, particularly, a carcass member a direction of a cord of which constitutes an angle of substantially 90° relative to a tire circumferential direction, and can easily adjust a length in accordance with a size, one piece of a cord (C) is continuously passed through a rubber coating die (14) to coat rubber on the cord, the rubber coated cord (C1) is shaped such that a sectional outer shape thereof constitutes an elliptical shape, the rubber coated cord (C1) is wound around an aligning drum (30) while adjusting a direction of the elliptical shape by way of an aligning guide (20) to bond without producing a gap to form a cylinder-like member (A1), thereafter, the cylinder-like member (A1) is cut in a direction in parallel with the drum axis center to constitute a sheet-like shape.

Abstract: The invention is aimed at shortening time and reducing labor in a work of fitting a multiplicity of cords, respectively, into grooves of a grooved press roll and of a grooved comb roll to align the same in a calender apparatus, in which rubber is topped on the multiplicity of cords as aligned, in an aligning work, the multiplicity of cords are first fitted into grooves on an upper surface side of the comb roll to be aligned, the press roll is then displaced to an alignment transfer position from a standby position close to a topping roll to be opposed to the upper surface side of the comb roll to thereby transfer an aligned state of the cords fitted into the grooves of the comb roll to the press roll as it is to fit the respective cords into grooves of the press roll and to displace the press roll to the standby position while maintaining the fitted state, to set the cords in an aligned state.

Abstract: The invention makes a rubber covering process for cords and processes of cutting and aligning cords a series of processes to enable simplification of installations and processes and manufactures a belt member of high quality, in which straightness and rubber adhesiveness of cords can be improved. As measures therefor, a belt member 50 of a predetermined width, in which a single cord C is made oblique, is fabricated by feeding a single cord C while maintaining straightness thereof in a longitudinal direction, passing the cord through a rubber covering die 15 during the feed to cover the cord C with rubber, subsequently feeding a tip end side portion of the rubber covered cord C1 to a constant rate cut line 20 to cut the tip end side portion of the rubber covered cord C1 every feed, and feeding the rubber covered cord C1 having been cut to an alignment table 30 in a state of maintaining the straightness to sequentially align and join the same obliquely to a cord direction.

Abstract: An improvement is achieved in productivity of a tire by preventing an unacceptably molded green tire, which is produced in a molding process, from flowing to a vulcanizing process. Measures therefor comprise putting an unvulcanized green tire on a mount surface of a mount stage, sticking an information label to a side wall of the green tire with a label sticking device arranged below a through-hole formed in a position, which corresponds to an inside of a bead body of the green tire, on the mount surface, and measuring a weight of the green tire with a gravimeter, which supports the mount stage.

Abstract: A process for producing easily in high efficiency an inner liner having strip pieces obtained by cutting a ribbonlike rubber strip at given length arranged in parallel relationship in the across-the-width direction, aligned in the direction of tire circumference and bonded together. The process comprises spirally winding ribbonlike rubber strip (21) round liner forming drum (10) at given pitch so as to make partial superimposition, thereby obtaining tubular matter (20), and cutting the tubular matter (20) at one position on the circumference thereof in the across-the-width direction so as to provide a sheet wherein severed strip pieces (21A) are bonded to each other in the state of being aligned in parallel relationship, having a length corresponding to the length of liner circumference on a forming drum in the tire forming step, and wherein the two ends on the starting side and terminating side of the spirally winding can be joined together on the forming drum.

Abstract: A radial tire that has excellent weight balance and appearance quality and that can be produced at excellent productivity. These are achieved by forming a carcass layer (1) by using a single rubber coated cord (C1) without producing joints on a material. The carcass layer (1) is constructed from at least one layer of cord row layer (11A) where rubber coated cords (C1) are cut on piece by piece basis and joined aligned in the circumferential direction of the tire. Each of the rubber coated cords is formed in a cross-section with an oval outline. The cord row layer is joined at only one portion in the circumferential direction of the tire, so that there is substantially no overlap on the layer.

Abstract: The invention is made to accelerate extrusion forming by reducing a friction between a forming rubber formed to cover a cord or formed to extrude and an inner wall face of a path at inside of a die as the die used for an extrusion forming head, a portion of an upstream portion of a rubber forming path (2) reaching a front end outlet (4) from a rubber storing portion (3) at inside of a die main body 1 is provided with a fluid sending inlet (8) for sending a fluid between an outer peripheral face of a forming rubber (R1) at inside of the rubber forming path (2) and an inner wall face of the path and a resistance of passing the forming rubber (R1) on a downstream side is reduced by the fluid.

Abstract: There is provided a belt member producing method including forming a strip piece 17 of a predetermined width W by cutting a strip material 12 including a plurality of reinforcement cords 11 to a regular size, conveying the strip piece 17 to a transfer conveyor 22 in such a manner that cut sides 19 of the strip piece 17 are in parallel with a traveling direction B of the transfer conveyor 22 and overlapping continuously an integral number Nint of strip pieces 17 on each other on the transfer conveyor 22 in such a manner that the strip pieces 17 are overlapped on each other by an overlapping amount P along non-cut sides 18 thereof, so as to produce a belt member 30 having a desired length equal to a predetermined length L of a belt layer of a pneumatic radial tire, the belt member producing method being characterized by including selecting a desired cutting angle ?pre relative to a traveling direction A of the strip material 17 when the strip material 12 is cut to the regular size, calculating a number Ncal of

Abstract: The invention provides a perforating apparatus, which can efficiently form air vent holes in necessary locations on a tire constituent member and facilitates setting and changes of perforated positions to be able to readily accommodate for a change in size of the tire constituent member, and as perforating means 10, which performs a piercing action every one-time conveyance, a multiplicity of needle bodies 11 disposed on one of upper and lower sides of a feed table 5 of a band-shaped material B for the tire constituent member to be able to perpendicularly pierce the band-shaped material B on the feed table 5 are arranged in parallel in a direction of conveyance of and in a width direction of the band-shaped material B and provided to be controlled individually in respective sets, each set being composed of one or plural needle bodies 11, or each set being composed of one or plural rows of needles bodies in a width direction.

Abstract: In the case where a lengthy rubber material (R) is wound on a winding roll (30) mounted on a moving cart (20), the invention prevents excessive bonding of the rubber material between respective layers and is capable of pulling out and supplying the rubber material as wound without a problem, and the lengthy rubber material (R) continuously extruded in a lengthy manner from a rubber extruder to be fed to a winding position is wound to be made spiral with alternately reverse inclination every layer while being caused by a traverse guide to traverse to the winding roll (30) mounted on the cart (20) in accordance with rotation of the roll.

Abstract: When forming a rubber member which is made up of a combination of a plurality of rubber compounds by winding spirally a ribbon-shaped unvulcanized rubber strip material in an overlapping fashion, the number of times of winding is reduced so as to shorten a fabrication cycle time of the rubber member to thereby increase the productivity thereof. As a means therefore, a rubber strip material whose cross section is divided into two or more regions which are made up of different rubber compounds is wound spirally on to a drum in an overlapping fashion so as to build a green tire or a tire rubber member.

Abstract: An object is to reduce a cycle time for fabricating a low rolling resistance pneumatic tire and to provide the same pneumatic tire. As a means therefor, in building a tread portion by winding spirally a rubber strip material whose cross section is divided into a first region made of a conductive rubber and a second region made of a non-conductive rubber in a tire circumferential direction in a partially overlapping fashion by the use of an extruding machine which extrudes continuously the rubber strip material, an area ratio of the first region relative to the cross section of the rubber strip material is made to change in a tire width direction.

Abstract: The invention provides a bead supply system which stocks annular beads without bringing the beads into contact with each other and supplies the beads to a building machine in steps where bead setting and turning up are carried out in tire building and includes a bead stocking unit (10) having a transfer means (20) for holding a plurality of beads in such a manner as to be spaced apart from each other at constant intervals and transferring the beads towards a distal end portion, a bead transfer unit (40) for receiving the beads one by one from the bead stocking unit (10) to transfer them to a loading waiting position (P1) on to a building machine (100), and a loading and setting unit (60) for receiving the beads from the bead transfer unit (40) in the loading waiting position (P1) to supply them to a loading and setting position (P2) which confronts two supporting elements of the building machine, wherein the respective units are made to operate in an associated fashion in accordance with a tire building cycle

Abstract: The invention can efficiently provide a carcass member constituting a carcass layer of a radial tire, particularly, a carcass member a direction of a cord of which constitutes an angle of substantially 90° relative to a tire circumferential direction, and can easily adjust a length in accordance with a size, one piece of a cord (C) is continuously passed through a rubber coating die (14) to coat rubber on the cord, the rubber coated cord (C1) is shaped such that a sectional outer shape thereof constitutes an elliptical shape, the rubber coated cord (C1) is wound around an aligning drum (30) while adjusting a direction of the elliptical shape by way of an aligning guide (20) to bond without producing a gap to form a cylinder-like member (A1), thereafter, the cylinder-like member (A1) is cut in a direction in parallel with the drum axis center to constitute a sheet-like shape.

Abstract: A method and device for manufacturing tire's annular member having a stretch mainly in radial direction by use of simple devices and simple way of pressing with high precision and easiness, as to produce tire product in high quality with no fluctuation of mass and/or uniformity, comprising: a first mold including a profile mold having an annular recess; a second mold which faces the first mold; and an extruder that continuously extrudes a rubber body into the recess of the profile mold. Concurrent with such extruding, the profile mold is rotated by one turn so as to charge the rubber body into the annular recess in a manner as annularly continuous. Then, the first and the second molds are brought abut each other so as to press the rubber body between the profile and second molds; thus shaping the rubber body into a shape defined by the profile mold.

Abstract: The invention can firmly and easily remove a finely divided weft piece without leaving the weft piece by constituting a method and an apparatus of removing weft from a cord fabric for a topping sheet in a calender line for topping rubber on a number of pieces of aligned cords by a calender roll. In the midst of transferring a cord fabric (F) transferred to a calender apparatus, weft is finely divided by passing the cord fabric (F) through weft dividing means, thereafter, a plurality of blades (45) arranged movably in a width direction on an upper face side of the cord fabric (F) are reciprocally moved in the width direction over an entire width thereof to be brought into contact with the cord fabric (F), and the divided weft piece (W1) is wiped off to remove by respectively striking respective cords (C) of the cord fabric (F) by the respective blades (45).

Abstract: The invention is aimed at shortening time and reducing labor in a work of fitting a multiplicity of cords, respectively, into grooves of a grooved press roll and of a grooved comb roll to align the same in a calender apparatus, in which rubber is topped on the multiplicity of cords as aligned, in an aligning work, the multiplicity of cords are first fitted into grooves on an upper surface side of the comb roll to be aligned, the press roll is then displaced to an alignment transfer position from a standby position close to a topping roll to be opposed to the upper surface side of the comb roll to thereby transfer an aligned state of the cords fitted into the grooves of the comb roll to the press roll as it is to fit the respective cords into grooves of the press roll and to displace the press roll to the standby position while maintaining the fitted state, to set the cords in an aligned state.

Abstract: The invention enables a built band (B) in a cylindrical shape to be easily and surely detached by peeling off the band (B) from being brought into close contact with a drum peripheral face in an expandable and contractable band building drum (D) constituted by two kinds of pluralities of segments (1a)(1b) arranged alternately in a peripheral direction, a diameter of one segment (1a) of two kinds of segments (1a)(1b) is contracted, thereafter, the segment (1a) is temporarily returned to a diameter expanding state, a diameter of other segment (1b) is contracted, thereby, the band (B) is peeled off from being brought into close contact with the drum outer peripheral face, thereafter, the band (B) is detached by bringing both of the segments (1a)(1b) into a diameter contracting state.

Abstract: The invention can surely accomplish lamination without the generation of voids in building a tire constructed to comprise a plurality of rubber members for a tire when a ribbon-shaped rubber strip (R) is spirally wound and laminated, and uses holding rolls (30) and two sets of stitching rolls (40a), (40b) arranged in parallel with a center of a rubber strip width (W) therebetween to enable performing of an independent pressing motion, such that the rubber strip (R) is pressed and bonded by the holding rolls (30) in a position, in which the rubber strip (R) is wound, and the stitching roll (40a) or (40b) positioned fore in an advancing direction of traverse movement, out of the two sets, is caused to perform a pressing motion in a regional part just after the press whereby a fore part of the rubber strip in the advancing direction is pressed and bonded.