764 results about "Tire manufacturing" patented technology

Methodology for characterizing non-uniformity forces at a tire spindle, such as low and high speed radial force variations and high speed tangential force variations include the steps of measuring radial run out and radial or tangential force variations at high and/or low speeds. From such measurements, the contribution of a predetermined type of stiffness variation (e.g. radial, tangential, extensional, bending) to respective radial and/or tangential force variations can be determined. Signature analysis statistical methods may also be utilized to characterize such tire non-uniform forces for different steps and reference physical angles of a tire construction process. Based on the characterization of such tire non-uniform forces, additional process steps may further correspond to tire grading and/or sorting processes, physical tire modification processes and tire manufacturing processes. Tire correction mechanisms and/or feedback control in a tire manufacturing process preferably yield tires having radial run out and stiffness variation parameters that are out of phase for one or more harmonics, thus yielding a reduction in the non-uniformity forces such as radial and tangential force variations at a tire spindle.

Tire building drum and tire building method, capable of assembling tire component members with high accuracy. A tire building drum is used, which includes at least one core body, which is disposed at an axial inside of a pair of bead lock means, and which comprises a plurality of sheets of rigid support members disposed in a toroidal shape and adapted to be displaced and thereby expanded or contracted. Bead cores are locked by the bead lock means, respectively, and a center portion of a carcass band is bulged while displacing the bead lock means close to each other. Back side portions of the carcass band are folded to radial outsides around the bead cores, respectively. The core body is then radially expanded to the maximum diameter while locking the bead cores, and tire component members are assembled onto the radially expanded core body.

A tire manufacturing assembly line is disclosed which can be reconfigured for making different types of tires in shorter runs. The assembly line can interchangeably use components from centralized preparation or integrated preparation, and interchangeably use storage reels of any form from the centralized preparation.

The invention relates to the tire manufacture field, especially to a tire apex composition for improving a bond system and its preparation method and application. The tire apex composition for improving the bond system is formed by the mixing of the following ingredients of: by weight, 70-100 parts of natural rubber, 0-30 parts of styrene-butadiene rubber, 55-75 parts of carbon black, 1.0-4.0 parts of resorcinol, 0.2-3.0 parts of cobalt decanoate, 3-8 parts of a methylene donator adhesive, 0-20 parts of white carbon black, 3-8 parts of a vulcanizing agent and a sulfuration promoter and other processing auxiliary agents. The tire apex composition for improving a bond system obviously raises modulus and binding property, decreases heat generation, minimizes modulus loss at high temperature,and simultaneously reduces formula cost. By employing BTR tires under the precondition of unchanged structure, the hard apex strength and hardness can be guaranteed not to be decreased, the modulus is substantially increased, the bond performance between the apex and steel wires/steel wire cords is remarkably improved, and the anti-destroy performance of tire bead positions is raised.

A rotatable drum (10) for use in the manufacture of vehicle tires, the drum including a plurality of segments which collectively define an outer circumference (32) of the drum. The segments are divided into first and second end portions (15,17) which are individually mounted for axial and radial movement between expanded and retracted positions relative to the rotational axis (16) of the drum. Each end portion of segments is further divided into first and second groupings (23,25), the segments (18,18') of the first and second groupings (23,25) being disposed in alternating juxtaposition with respect to the segments of the second grouping (18') and with the segments of the first grouping being movable axially further and radially faster than the segments of the second grouping as the segments are moved between their expanded and retracted positions so that the segments of the second grouping are received in overlying relationship to the segments of the first grouping as the segments of the first and second groupings are simultaneously moved radially inward toward the rotational axis of the drum. A third grouping 23 of the segments of each end portion of segments is provided for, with these segments (19,19') being received in overlying relationship to the segments of the first and second groupings. Further, in a preferred embodiment, each segment is provided with a shell member (24,26), with the shell members collectively defining the outer cylindrical surface (32) of the drum. A method for the production of a rotatable cylindrical drum (10) and a method for the manufacture of an OTR vehicle tire are disclosed.

The present invention provides an inner liner of pneumatic tires that is formed from a non-drawn film of a polymer composition including 60 to 90 wt. % of a thermoplastic resin and 10 to 40 wt. % of an elastomer to have an oxygen permeation rate of less than 15×10⁻³ ccm/m² 24 hratm, and a fracture elongation of more than 200% at the room temperature. The tire thus manufacture has no fracture under a severe deformation during the tire shaping process, facilitating the tire manufacture, and exhibits an air permeation preventive property as an excellent air permeation preventive layer.

A tire building method and a stitcher device therefore, which are aiming for achieving reliable pressing for bonding between a plurality of tire members all over outer face of the tire members, without forming a void between them, even though the outer face of the tire members have ups and downs, so as to curb strain in a carcass cord and to improve process efficiency. The method comprising: laying one or more of the tire members on a rotary support body such as a building drum; and press-contacting a press-contact part of a stitcher device on said one or more of the tire members on the rotary support while the rotary support being rotated, so as to bond together said one or more of the tire members; said press-contact part being a pneumatic-tire roller maintained with a certain level of inner pressure.

The invention relates to a RFID chip that is contained inside a rubber tire to provide wireless communication of information concerning the tire. For instance, it may be desirable to communicate pressure and temperature information concerning a tire during its manufacture and/or usage. The RFID chip is attached to the inside of the rubber tire and is capacitvely coupled to a conductive belt contained inside the tire to provide an antenna for radio-frequency communications and reception.

Improved and more easily implemented methods for predicting uniformity parameters such as uneven mass distribution, radial run out and high speed radial force variation utilize other measurements such as the tire crown thickness variation. When high speed radial force variation is calculated, low speed radial force variation is also measured. Tire crown thickness variation can be measured in different fashions depending on the particular tire manufacturing process employed. By electronically determining resultant uniformity parameters, tires can be improved by rectification to address the uniformity levels. In addition, tire manufacturing can be improved by altering the resultant location of tire crown thickness variation relative to other aspects of the tire and/or tire manufacturing process.

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.

[Problems to be solved] It is to provide a method for forming a rubber strip which enables a wider rubber of small thickness without lowering an extruding speed and enables to reduce a building cycle time, thereby increasing the efficiency of tire manufacturing.

[Means for Solving the Problems] Temperatures at a main-part casing 11, a screw shaft 12 and a head region included with the die 13 are controlled to be different from each other in a manner that: the temperature as controlled in the main-part casing 11 is higher than that in the screw shaft 12; and the temperature as controlled in the head region is higher than that in the main-part casing 11, when continuously extruding a rubber material in a form of a ribbon in forming a rubber strip 1.

A tire building system, which does not require prolonging tact time for tire building, specific occupying space for endless circulative traveling of a building carriage, and increasing noises and vibrations, and which is free from possibility of premature deterioration of carriage positioning accuracy. The system includes workstations configured to mount applicable tire components onto a building drum, respectively; a building carriage configured to support the building drum to thereby move the building drum among the respective workstations; and carriage guiding means for guiding a movement of the building carriage on a predetermined path. The carriage guiding means includes two inner and outer endless rails, and wheels provided on the building carriage, the wheels each being configured to roll on opposite side surfaces of associated one of the endless rails to thereby restrict a carriage position in a direction orthogonal to an extending direction of the endless rails. The endless rails are each configured with a straight portion and an arcuate portion which are smoothly continued to each other, and the arcuate portion has a rail width W narrower than a rail width of the straight portion.

A pneumatic tire that can be manufactured according to the conventional method without requiring special tire manufacturing steps and without needing addition of material members and production steps, and having excellent rolling resistance and wet properties, and having conductivity is to be provided. A pneumatic tire 10 comprises a carcass 14 having a ply which is turned back and locked around a bead core 12, a rim strip 19 provided in a bead part 11, and a wing 24 in which one edge thereof is contacted with the carcass 14 and the other edge is exposed to the surface of a ground contact edge region of a tread part 13, wherein a covering rubber of a carcass ply 25, the rim strip 19 and the wing 24 are formed into a continuous conductive path by a conductive rubber material, only the conductive path is used as a conducting path of the tire 10, and members other than the conducting path are selected and used from a conductive rubber material or a nonconductive rubber material.

The invention relates to the field of manufacture of tires, in particular to a liquid isoprene rubber containing bead filler composition of a tire as well as a preparation method and application thereof. The liquid isoprene rubber containing bead filler composition of the tire is formed by mixing the following components in parts by weight: 85-97 parts of natural rubber, 3-15 parts of liquid isoprene rubber, 65-75 parts of carbon black, 4-8 parts of vulcanizing agent and vulcanization accelerator and the balance of processing assistants. In the invention, the stiffness of parts can be sufficiently ensured, and the deformation of the parts in the processing process can be prevented; and moreover, the higher processing safety of rubber materials can be ensured due to longer scorching time. When an all-steel radial truck tire provided by the invention is adopted, the high extrusion temperature rise is reduced, the production efficiency is increased, the technical loss is reduced and the like on the premise that the structure is unchanged, and the main physical mechanical properties of hard bead filler materials, the dimension stability of the parts, and the technical viscidity is notunreduced.

There is provided a method of tire manufacturing a tire in which preset-beads each preformed by mounting a bead filler on a bead core are disposed radially outward of a carcass band and both side portions of the carcass band are turned around the preset beads to build the tire. The method eliminates a need to bold the considerable intermediate stocks and does not deteriorate the tire uniformity due to the unevenness of the preset bead in the circumference direction. There are also provided an apparatus of forming a preset bead used therefore and a system of forming a preset bead. In the method of manufacturing a tire in which preset-beads each preformed by mounting a bead filler on a bead core are disposed radially outward of a carcass band and both side portions of the carcass band are turned around the preset beads to build the tire, the preset bead is formed by winding and laminating a ribbon-shaped filler rubber 5 radially outward of the bead core 10 over several laps.

Tire-making apparatus (20) defining an outer or inner circumference (18) to serve as a forming surface or as a circumference-engaging surface, respectively, utilizes a frame (16) having a central axis (52) and a plurality of multi-sectional segments (28) which are moveable radially with respect to the central axis and include arcuate surfaces which collectively define the apparatus circumference. Each segment includes a primary section (60) and a secondary section (62) which flanks the primary section. The primary and secondary sections are connected so that as the segments are moved radially of the central axis, the primary and secondary sections move relative to one another along the circumference of the apparatus to help maintain the uniformity, or roundness, of the surface of the circumference collectively defined by the segments.

The invention belongs to the field of tire manufacturing technology, and specifically relates to a sidewall rubber of an automobile tire. The sidewall rubber of the automobile tire is characterized in that the sidewall rubber comprising the following components of natural rubber, butadiene rubber, styrene butadiene rubber, ethylene propylene diene monomer rubber, polybutadiene rubber, zinc carbonate, light calcium carbonate, stearic acid, talcum powder, titanium dioxide, low structure high-abrasion furnace black, white clay, zinc oxide, stearic acid, Santo white crystal, high aromatic hydrocarbon oil, an accelerant, paraffin, Santo flacks, insoluble sulfur, carbon black, aluminium hydroxide, alkyl phenol disulfide and magnesium oxide. By adopting the formula composed by the above components, the sidewall rubber of the automobile tire has relatively good strength and elongation property, can endure atmospheric aging, flex cracks and mechanical damages, can protect the tire body from corrosion of the mechanical damages, sunlight, wind and rains.

Provided is a pneumatic tire manufacturing method capable of improving the productivity of pneumatic tires each having surface fasteners in its tire inner surface, and of avoiding manufacturing a pneumatic tire having a deteriorated uniformity, as well as of preventing engagement elements of each surface fastener from being crushed. Also, provided is a pneumatic tire manufactured by the pneumatic tire manufacturing method. The pneumatic tire manufacturing method according to the present invention includes the steps of, in making a green tire having two-side fasteners in its tire inner surface in its tire circumferential direction, each two-side fastener including an engagement element group on both sides: covering the engagement element groups on first sides of the two-side fasteners with a protective rubber layer made of an uncured rubber; making a cylindrical first formed body on a making drum, with the two-side fasteners covered with the protective rubber layer being intermittently attached to an inner circumferential surface of the first forming body in a circumferential direction thereof with the engagement element groups on second sides of the two-side fasteners being interposed in between; bonding the first formed body to an inner circumference of an annular second formed body by compression through expanding the first formed body into a toroidal shape, and thereby making the green tire; and curing the green tire inside a mold of a curing machine while pressing the green tire from its inside by a bladder.

A method of simultaneously producing production runs of tires 200 on a multi-station sequential tire manufacturing system 10, the tires 200 being from a group of tire types of different build specifications in lot sizes of one or more tires is disclosed. The steps include: scheduling the production run by imputing tire build software, wherein the software program performs the steps of: selecting the tire building equipment and materials required for the respective tire types; calculating the corresponding number of cycles each piece of building equipment must perform to build a given lot; and automatically changing to a second build specification at a lot change by switching to the second build specification after the last tire 200 of the first build specification passes; repeating the automated changing to the next build specification at each station 11-16 and 71-74) as each last tire 200 of each prior lot passes until a final lot is produced. The multi-station sequential tire manufacturing system 10 has at least four stations for carcass 4 building, each station (11-16) being spaced at a predetermined distance and preferably a multistation tread belt assembly line 30 having workstations (71-74) separate from the carcass building line 20 wherein the carcass 4 and the tread belt assemblies 3 are joined in a segmented self-locking mold 50.

Disclosed is a tire production management system, and more particularly to, a tire production management system using a radio frequency identification (RFID) tag, which may attach an RFID tag to a tire before producing a finished tire in tire manufacturing processes, recognize the tire tag attached to the tire in each of manufacturing processes, and thus manage information according to a manufacturing process on an individual tire. The tire production management system using an RFID tag comprises: an RFID tag attachment part; a plurality of RFID readers; a plurality of management terminals for respective processes; a lot management server; and a tire production management server.

The invention specifically relates to an automobile tire tread rubber, which belongs to the field of tire manufacturing technology. The automobile tire tread rubber is characterized by comprising the following components: natural rubber, butadiene styrene rubber, polybutadiene rubber, brominated butyl rubber, stearic acid, sulphur, carbon black, paraffin, a coumarone resin, sixth line distillate, zinc oxide, pine tar, ISAF, a promoter DM, a promoter CZ, an anti-aging agent, highly wear-resistant furnace black and gas carbon black. The invention has the following beneficial effects: appropriate parts by weight of the above-mentioned components are employed for preparation of the tread rubber, so a tire has good wear resistance, ageing resistance and wet skid resistance; aging resistance of the natural rubber is inferior to that of the butadiene styrene rubber, so combination of the natural rubber and the butadiene styrene rubber and addition of the anti-aging agent enable the anti-aging performance of the rubber to be improved.