CN113799550B - Composite bead core for tire and manufacturing method thereof - Google Patents
Composite bead core for tire and manufacturing method thereof Download PDFInfo
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- CN113799550B CN113799550B CN202111129335.XA CN202111129335A CN113799550B CN 113799550 B CN113799550 B CN 113799550B CN 202111129335 A CN202111129335 A CN 202111129335A CN 113799550 B CN113799550 B CN 113799550B
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- composite bead
- core
- yarn
- composite
- tire
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- 239000011324 bead Substances 0.000 title claims abstract description 183
- 239000002131 composite material Substances 0.000 title claims abstract description 126
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000000835 fiber Substances 0.000 claims abstract description 71
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 64
- 239000010959 steel Substances 0.000 claims abstract description 64
- 239000000126 substance Substances 0.000 claims abstract description 61
- 239000010410 layer Substances 0.000 claims abstract description 47
- 239000011247 coating layer Substances 0.000 claims abstract description 23
- 238000007598 dipping method Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000009954 braiding Methods 0.000 claims abstract description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 12
- DGXAGETVRDOQFP-UHFFFAOYSA-N 2,6-dihydroxybenzaldehyde Chemical compound OC1=CC=CC(O)=C1C=O DGXAGETVRDOQFP-UHFFFAOYSA-N 0.000 claims description 7
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Substances C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000009941 weaving Methods 0.000 claims description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 239000004816 latex Substances 0.000 claims description 6
- 229920000126 latex Polymers 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 5
- 150000002527 isonitriles Chemical class 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 238000001035 drying Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 5
- 235000014676 Phragmites communis Nutrition 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 229920004933 Terylene® Polymers 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
- B29D30/50—Covering, e.g. by winding, the separate bead-rings or bead-cores with textile material, e.g. with flipper strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
- B60C2015/042—Bead cores characterised by the material of the core, e.g. alloy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
- B60C2015/046—Cable cores, i.e. cores made-up of twisted wires
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ropes Or Cables (AREA)
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
The composite bead core for the tire is manufactured by a composite bead cord, wherein the composite bead cord is provided with a skin core structure formed by braiding a plurality of chemical fiber filaments outside a steel wire core wire. The manufacturing method of the composite bead core for the tire comprises the following steps: obtaining a steel wire core wire; obtaining a plurality of chemical fiber filaments; the chemical fiber filament is woven outside the steel wire core wire to form a chemical fiber coating layer with a three-dimensional interweaving structure, and the chemical fiber coating layer and the steel wire core wire form a composite bead cord with a sheath-core structure; treating the composite bead cord with a dipping solution; the composite bead cord after the dipping liquid treatment is continuously wound layer by layer to form the composite bead core with the preset shape for the tire.
Description
Technical Field
The application belongs to the technical field of vehicle tires, and particularly relates to a composite tire bead core for a tire and a manufacturing method thereof.
Background
The beads play a critical role in the tire. In the tire building process, the tire bead hoops the tire body to prevent the tire body from being back pumped under a certain inflation pressure. The tire is mounted on a rim and the beads are subjected to deformations caused by the mounting. The beads also ensure a seal between the tire and the rim. During running of the vehicle, centrifugal forces, side thrusts and torques acting on the tyre are such that the beads are also subjected to longitudinal and torsional stresses.
The light weight of tires is currently the main development direction of tire factories, and especially the development and application of novel framework materials will be the important direction of tire upgrading. Related patents related to chemical fiber beads and chemical fiber and metal composite beads, and related reports are provided for companies such as Sumitomo rubber, polysta, guest, double endurance, toyo rubber and the like. However, at present, the processing and manufacturing of the domestic and foreign tires generally adopts steel wire tire beads, and the application of chemical fiber and metal composite tire beads in actual production is blank.
Disclosure of Invention
In view of this, in one aspect, some embodiments disclose a composite bead core for a tire made from a composite bead cord having a skin core structure formed by braiding a plurality of chemical fiber filaments outside a steel wire core.
On the other hand, some embodiments disclose a method for manufacturing a composite bead core for a tire, which is used for manufacturing the composite bead core for a tire disclosed in some embodiments, and the manufacturing method specifically includes:
obtaining a steel wire core wire;
obtaining a plurality of chemical fiber filaments;
the chemical fiber filament is woven outside the steel wire core wire to form a chemical fiber coating layer with a three-dimensional interweaving structure, and the chemical fiber coating layer and the steel wire core wire form a composite bead cord with a sheath-core structure;
treating the composite bead cord with a dipping solution;
the composite bead cord after the dipping liquid treatment is continuously wound layer by layer to form the composite bead core with the preset shape for the tire.
Further, some embodiments disclose a method for manufacturing a composite bead core for a tire, in which a plurality of chemical fiber filaments form a yarn, the yarn is treated with a dipping solution, and the treated yarn is woven outside a steel wire core wire to form a chemical fiber coating layer.
Some embodiments disclose a method of making a composite bead core for a tire, treating a yarn with a dipping solution comprising:
impregnating the yarn with the impregnating solution for 100-200 s;
forming a coating on the surface of the yarn through glue extrusion of a die orifice;
the yarn with the coating on the surface is heated and dried at 150-250 ℃.
Some embodiments disclose a method for manufacturing a composite bead core for a tire, wherein the step of forming a chemical fiber coating layer outside a steel wire core wire by yarn braiding comprises the following steps:
a plurality of yarns are used as warp yarns and are arranged in parallel with a steel wire core wire;
a chemical fiber multifilament with the specification of 200-1000D is not twisted to be used as weft yarn;
the weft yarn shuttles back and forth among the warp yarns, the warp yarns and the weft yarn interweave to form a closed tubular chemical fiber coating layer with a three-dimensional structure, and the closed tubular chemical fiber coating layer surrounds the outside of the steel wire core wire to form the composite bead core.
Some embodiments disclose a method for manufacturing a composite bead core for a tire, wherein a plurality of 200-3000D chemical fiber filaments are twisted and impregnated into one yarn, or a plurality of 200-3000D chemical fiber filaments are combined and impregnated into one yarn.
Some embodiments disclose a method of making a composite bead core for a tire, treating the composite bead cord with a dipping solution comprising:
dipping the composite bead cord for 100-200 s by using dipping liquid;
extruding glue through a die opening to form a coating on the surface of the composite tire bead cord;
the composite bead cord with the coating on the surface is heated and dried at 150-250 ℃.
Some embodiments disclose a method for manufacturing a composite bead core for a tire, wherein the diameter of the steel wire core wire is 0.5-3 mm.
The manufacturing method of the composite bead core for the tire disclosed in some embodiments comprises the following steps of: 30 to 60 parts of softened water, 0.1 to 2 parts of ammonia water with the concentration of 29.5 percent, 3 to 6 parts of resorcinol-formaldehyde resin with the solid content of 75 percent, 40 to 60 parts of butadiene-pyridine latex with the solid content of 41 percent, 1 to 5 parts of formaldehyde with the concentration of 37 percent and 1 to 6 parts of closed isonitrile acid ester with the concentration of 50 percent.
Some embodiments disclose a method for manufacturing a composite bead core for a tire, wherein the steel wire core is a single steel wire or is formed by twisting a plurality of steel wires.
The composite tire bead core for the tire is prepared by the manufacturing method of the composite tire bead core for the tire, and the composite tire bead core for the tire is prepared by adopting the chemical fiber and the steel wire, so that the composite tire bead cord material for the tire is high in chemical fiber strength, high in modulus, good in dynamic load bearing and local impact action performance, and not deformed under the vulcanization conditions of high temperature above 200 ℃ and high pressure above 2.5MPa, the composite tire bead cord with a skin core structure is continuously wound and overlapped to form the composite tire bead core, the fiber orientation is set to be consistent with the rotation direction of the tire, the strength utilization rate of the fiber is improved, the strength utilization rate is more than 90%, the weight of a traditional tire bead is reduced, the stress of the tire bead part is more reasonable, the service durability of the tire bead is improved, meanwhile, delamination and downward bulge which are easy to occur at the tire bead part of the tire is reduced, the safety coefficient of the tire bead part is adjusted, and the whole service performance of the tire is improved.
Drawings
FIG. 1 example 1 schematic structural view of a composite bead core for a tire
FIG. 2 example 2 schematic representation of the composite bead cord weave weft yarn trajectories
Reference numerals
1. Composite bead cord 11 steel wire core wire
12. Warp yarn 13 weft yarn
2. First latch needle 3 second latch needle
Detailed Description
The word "embodiment" as used herein does not necessarily mean that any embodiment described as "exemplary" is preferred or advantageous over other embodiments. Performance index testing in the examples herein, unless otherwise indicated, was performed using conventional testing methods in the art. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.
Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; other test methods and techniques not specifically identified herein are those commonly employed by those of ordinary skill in the art.
The terms "substantially" and "about" are used herein to describe small fluctuations. For example, they may refer to less than or equal to ±5%, such as less than or equal to ±2%, such as less than or equal to ±1%, such as less than or equal to ±0.5%, such as less than or equal to ±0.2%, such as less than or equal to ±0.1%, such as less than or equal to ±0.05%. Numerical data presented or represented herein in a range format is used only for convenience and brevity and should therefore be interpreted flexibly to include not only the numerical values explicitly recited as the limits of the range, but also to include all the individual numerical values or sub-ranges encompassed within that range. For example, a numerical range of "1 to 5%" should be interpreted to include not only the explicitly recited values of 1% to 5%, but also include individual values and sub-ranges within the indicated range. Thus, individual values, such as 2%, 3.5% and 4%, and subranges, such as 1% to 3%, 2% to 4% and 3% to 5%, etc., are included in this numerical range. The same principle applies to ranges reciting only one numerical value. Moreover, such an interpretation applies regardless of the breadth of the range or the characteristics being described.
In this document, including the claims, conjunctions such as "comprising," including, "" carrying, "" having, "" containing, "" involving, "" containing, "and the like are to be construed as open-ended, i.e., to mean" including, but not limited to. The conjunctions "consisting of … …" and "consisting of … …" are closed conjunctions.
Numerous specific details are set forth in the following examples in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In the examples, some methods, means, instruments, devices, etc. well known to those skilled in the art are not described in detail in order to highlight the gist of the present application.
On the premise of no conflict, the technical features disclosed in the embodiments of the present application may be combined arbitrarily, and the obtained technical solution belongs to the disclosure of the embodiments of the present application.
In some embodiments, the composite bead core for a tire is made of a composite bead cord having a skin core structure formed by braiding a plurality of chemical fiber filaments outside a steel wire core.
Generally, a wire core is a linear core formed of wires, including a single wire as a linear core, or a plurality of wires combined to form a linear core, which is cylindrical in shape as a whole. The manner in which the plurality of steel wires are combined to form the linear core includes twisting the plurality of steel wires to twist into a wire rope.
Typically, the diameter of the wire core is controlled between 0.5 and 3mm, for example a single wire with a diameter between 0.5 and 3mm forms a linear core, or a combination of a plurality of smaller wires forms a linear core with an overall diameter between 0.5 and 3mm. Typically the tensile strength of the wire core is more than 2200MPa.
Generally, a plurality of chemical fiber filaments are woven outside a steel wire core wire to form a closed fiber layer, and the closed fiber layer is wrapped on the steel wire core wire to form a skin core structure; the fiber layer is provided with a three-dimensional crossed three-dimensional structure formed by interweaving a plurality of chemical fiber filaments, and the three-dimensional crossed three-dimensional structure is wrapped outside the steel wire core wire which is integrally cylindrical to form the integrally cylindrical composite tire bead cord.
In general, the process of forming the composite bead cord into a composite bead core is to provide a composite bead cord to be wound with a set radius, the winding is continuously performed to form a composite bead cord layer having a certain width, the winding is continuously performed, a second composite bead cord layer is further formed outside the composite bead cord layer, and the winding is repeated several times to obtain a multi-layer composite bead cord layer, and the multi-layer composite bead cord layer forms the composite bead core having a certain shape and specification. The chemical fiber layer on the surface layer of the composite bead cord is generally immersed with the immersion liquid, the immersion liquid forms a film layer, and the composite bead cord forming the composite bead core is promoted to form a uniform integrated structure inside the composite bead core through the mutual adhesion effect of the film layer, so that the structural strength of the composite bead core is enhanced. On the other hand, the film layer formed by the impregnating solution can also increase the adhesive force between the composite bead core and the rubber layer on the surface of the composite bead core, and improve the overall strength and the service performance of the tire.
Generally, as an alternative embodiment, the composite bead core is generally annular in shape, with a square or hexagonal cross-section.
In some embodiments, a method of making a composite bead core for a tire includes:
obtaining a steel wire core wire; for example, a steel wire is used as a steel wire core wire, or a plurality of steel wires with smaller diameters form the steel wire core wire to be used as a linear core part of the composite bead core;
obtaining a plurality of chemical fiber filaments; for example, a plurality of chemical fiber filaments with the specification of 200-3000D can be selected to form yarns or chemical fiber multifilament yarns can be formed to be used as raw materials for forming chemical fiber coating layers; as an alternative embodiment, the chemical fiber filaments are any one of aramid fiber, carbon fiber or basalt fiber, and have the advantages of high strength, small elongation, small creep and high temperature resistance; generally, the density of the chemical fiber filaments is smaller than that of the steel wires, and the chemical fiber filaments can bear the acting forces such as stretching, compressing, twisting, centrifuging and the like brought in the running process of the tire; as an alternative embodiment, a plurality of chemical fiber filaments are selected to twist, and twisted into yarn; typically, the twist is set to 15 to 60 turns/meter;
the chemical fiber filament is woven outside the steel wire core wire to form a chemical fiber coating layer with a three-dimensional interweaving structure, and the chemical fiber coating layer and the steel wire core wire form a composite bead cord with a sheath-core structure; generally, as an alternative embodiment, a plurality of chemical fiber filaments are selected to form yarns, or multifilament yarns are formed, and the chemical fiber coating layer is obtained by weaving the yarns or the multifilament yarns on a steel wire core wire; the chemical fiber filaments form a chemical fiber coating layer with a three-dimensional structure by adopting a parallel yarn or a compound twisting mode, wherein yarns are distributed and oriented along the axial direction of the cord, so that the strength utilization rate of the fibers is effectively improved;
treating the composite bead cord with a dipping solution; generally, a coating film can be formed on the surface of the composite bead cord after the composite bead cord is treated with a dipping solution, and the coating film can increase the adhesive strength between the fiber coating layer and the rubber layer outside the fiber coating layer and the fiber inside the fiber composite bead core;
the composite bead cord after the dipping liquid treatment is continuously wound layer by layer to form the composite bead core with the preset shape for the tire.
As an alternative embodiment, a plurality of chemical fiber filaments form a yarn, the yarn is treated with an impregnating solution, and the treated yarn is woven outside the steel wire core wire to form a chemical fiber coating layer.
As an alternative embodiment, treating the yarn with the impregnating solution comprises: impregnating the yarn with the impregnating solution for 100-200 s; forming an impregnating liquid layer on the surface of the yarn through glue extrusion of a die orifice; the yarn with the impregnating liquid layer on the surface is heated and dried at 150-250 ℃.
As an alternative embodiment, the yarn drying process with the impregnating layer on the surface includes: drying for 120-180 seconds at 150-200 ℃, then drying for 120-180 seconds at 200-250 ℃, and drying the impregnating solution to form a coating film, thereby obtaining the impregnated yarn with the adhesive attachment rate of more than 30%. In general, the gel attachment rate refers to the mass ratio of the coating film attached to the yarn.
As an alternative embodiment, the yarn braiding to form a chemical fiber coating on the outside of the steel wire core wire includes: a plurality of yarns are used as warp yarns, are arranged in parallel with a steel wire core wire and are introduced into a loom; a chemical fiber multifilament with the specification of 200-1000D is not twisted to be used as weft yarn; the weft yarn shuttles back and forth among the warp yarns, the warp yarns and the weft yarn interweave to form a closed tubular chemical fiber coating layer with a three-dimensional structure, and the closed tubular chemical fiber coating layer surrounds the outside of the steel wire core wire to form the composite bead core.
As an alternative embodiment, a plurality of 200-3000D chemical fiber filaments are twisted and impregnated into one yarn, or a plurality of 200-3000D chemical fiber filaments are combined and impregnated into one yarn.
As an alternative embodiment, treating the composite bead cord with the impregnating solution comprises: dipping the composite bead cord for 100-200 s by using dipping liquid; extruding glue through a die opening to form a coating on the surface of the composite tire bead cord; the composite bead cord with the coating on the surface is heated and dried at 150-250 ℃.
As an alternative embodiment, the drying process of the composite bead cord with the impregnating liquid on the surface comprises: drying for 120-180 seconds at the temperature of 150-200 ℃, then drying for 120-180 seconds at the temperature of 200-250, and drying the impregnating solution to form a coating film, thereby obtaining the impregnated composite bead cord with the adhesive attachment rate of more than 30%. In general, the glue attachment rate refers to the mass ratio of the coating film attached to the composite bead cord.
As an alternative embodiment, the impregnating solution includes, in parts by mass: 30 to 60 parts of softened water, 0.1 to 2 parts of ammonia water with the concentration of 29.5 percent, 3 to 6 parts of resorcinol-formaldehyde resin with the solid content of 75 percent, 40 to 60 parts of butadiene-pyridine latex with the solid content of 41 percent, 1 to 5 parts of formaldehyde with the concentration of 37 percent and 1 to 6 parts of closed isonitrile acid ester with the concentration of 50 percent. Wherein, 20-40 parts of softened water is used for diluting resorcinol-formaldehyde resin with the solid content of 75%; 10-20 parts of softened water for diluting the butadiene-pyridine latex with the solid content of 41%; further, the diluted resorcinol-formaldehyde resin is mixed with the diluted fixed-pyridine emulsion under the heating state, and ammonia water, formaldehyde and blocked isocyanate are added to obtain the impregnating solution.
Further exemplary details are described below in connection with the embodiments.
Example 1
Fig. 1 is a schematic view of a composite bead core for a tire disclosed in example 1.
In example 1, a composite bead core for a tire is formed by winding composite bead cords 1 on bead rings one by one, the cross-sectional shape of which is hexagonal, and the composite bead cords 1 are formed in five layers in the number of 3-4-5-4-3 on a hexagonal cross-section formed by winding the composite bead cords 19 times.
Example 2
Fig. 2 is a schematic diagram of the weft motion trace of the cross section of the composite bead cord disclosed in example 2.
In example 2, the yarn braiding to form a chemical fiber coating layer outside the steel wire core wire includes: a plurality of yarns serving as warp yarns 12 are arranged in parallel with one steel wire core wire 11 and are led into a loom; the steel wire core wire 11 is positioned in the center, a plurality of yarns 12 are uniformly distributed on the round surface of the steel wire core wire 11, and the orientation is consistent; one weft yarn 13 shuttles among a plurality of warp yarns 12, the warp yarns 12 and the weft yarns 13 are interwoven to form a closed tubular chemical fiber coating layer with a three-dimensional structure, and the closed tubular chemical fiber coating layer surrounds the outside of the steel wire core wire to form a composite tire bead core; wherein the motion trajectory of the weft yarn 13 is set as:
as shown in fig. 2, taking the left yarn of the cross section of the composite bead cord as an inlet, moving weft yarn 13 to the position of a first latch needle 2 on the right side along with the warp yarn passing through the upper half of the cross section from the inlet by a weft yarn needle, backing the weft yarn into a latch needle hook, and then moving back and forth along with the latch needle to release the needle for looping, and simultaneously retracting the weft yarn to the inlet along the original path to complete the weaving of the upper half; subsequently, the weft yarn 13 moves to the second latch needle 3 on the right side along with the weft yarn needle passing through the lower half part of the cross section from the inlet, the weft yarn is in the latch needle to be in loop with the latch needle moving back and forth, and simultaneously the weft yarn returns to the inlet along the original path, so that the weaving of the lower half part is completed, and the movement track of the weft yarn wound around the steel wire core yarn and a plurality of warp yarns for one circle is formed.
Repeating the motion trail, and weaving by taking different yarns as inlets until the manufacturing of the composite bead cord is completed.
Example 3
The manufacturing process of the composite bead core disclosed in example 3 includes:
(1) Taking one aramid filament with the specification of 1500D, twisting on a ring twisting machine, wherein the twist is set to be 20 twists/meter, and taking the twisted filaments as warp yarns for standby;
(2) 15 warp yarns are respectively led out from the creel tensioner and are arranged in parallel, and are pulled to the reed of the loom through a branching device and a threading device of the loom;
(3) Taking a piece of terylene multifilament with the specification of 500D as weft yarn without twisting;
(4) Taking a steel wire core wire with the diameter of 0.7mm, and dragging the steel wire core wire to a reed of a loom through an unwinding device, a magnetic eye and a tension device;
(5) The steel wire core wires are tightly arranged in the center position through the opening and closing opening movement of the loom and the shuttle reciprocating movement of the weft yarns among the warp yarns, and the warp yarns and the weft yarns are interwoven to form a closed tubular structure coated outside the steel wire core wires, so that the composite bead cord is obtained.
(6) Fully immersing the obtained composite tire bead cord in the immersion liquid for 140s; the glue is extruded through a die, firstly dried for 180 seconds at 150 ℃, and then heat treated for 120 seconds at 225 ℃, and the glue attaching rate is more than 30 percent. The impregnating solution comprises: 30 parts of softened water, 0.1 part of ammonia water with the concentration of 29.5%, 3 parts of resorcinol-formaldehyde resin with the solid content of 75%, 40 parts of butadiene-pyridine latex with the solid content of 41%, 1 part of formaldehyde with the concentration of 37% and 1 part of closed isonitrile acid ester with the concentration of 50%.
(7) The diameter of the heated and dried compound tire bead cord is 2mm, the linear density is 9.85g/m, and the heated and dried compound tire bead cord is wound on a bead ring disc layer by layer through a traction device to form the compound tire bead core. Comprising the following steps: the single composite bead cord is first formed of 3 windings adjacent to each other on the circumferential surface of the bead wire disc, forming a first layer of composite bead cord; and then continuously winding 4 coils adjacent to each other on the circumferential surface of the bead ring disc to form a second layer overlapped with the first layer in the radial direction of the bead ring disc, repeatedly forming 19 coils to form a five-layer compound bead cord array arranged in a 3-4-5-4-3 array, and finally winding the joint part by using a film to obtain the compound bead core, wherein the cross section of the compound bead core is hexagonal.
The single composite bead cord obtained in example 3 was subjected to a breaking strength performance test, and the breaking strength was 5553N.
Example 4
The process for making the composite bead core disclosed in example 4 includes:
(1) Taking one aramid filament with the specification of 1500D without twisting; fully immersing the aramid filaments in the prepared first impregnating solution for 120s; extruding glue through a die opening, heating and drying at 110 ℃ for 150 seconds, wherein the glue attaching rate is more than 10%, and taking the glue as warp for standby;
(2) 15 warp yarns obtained in the step (1) are respectively led out from a creel tensioner and are arranged in parallel, and are pulled to a reed of the loom through a branching device and a threading device of the loom;
(3) Taking a piece of terylene multifilament with the specification of 500D as weft yarn without twisting;
(4) Taking a steel wire core wire with the diameter of 0.8mm, wherein the steel wire core wire is formed by twisting three steel wires; and is drawn to the reed of the loom through the unwinding device, the magnetic eye and the tension device;
(5) The steel wire core wires are tightly arranged in the center position through the opening and closing opening movement of the loom and the shuttle reciprocating movement of the weft yarns among the warp yarns, and the warp yarns and the weft yarns are interwoven to form a closed tubular structure coated outside the steel wire core wires, so that the composite bead cord is obtained.
(6) Fully immersing the obtained composite tire bead cord in a second immersion liquid for 140s; extruding glue through a die, firstly drying for 180 seconds at 150 ℃, and then heat-treating for 120 seconds at 225 ℃, wherein the glue attaching rate is more than 30%;
(7) The diameter of the heated and dried compound tire bead cord is 2.1mm, the linear density is 10.25g/m, and the heated and dried compound tire bead cord is wound on a bead ring disc layer by layer through a traction device to form the compound tire bead core. Comprising the following steps: the single composite bead cord is first formed of 3 windings adjacent to each other on the circumferential surface of the bead wire disc, forming a first layer of composite bead cord; and then continuously winding 4 coils adjacent to each other on the circumferential surface of the bead ring disc to form a second layer overlapped with the first layer in the radial direction of the bead ring disc, repeatedly forming 19 coils to form a five-layer compound bead cord array arranged in a 3-4-5-4-3 array, and finally winding the joint part by using a film to obtain the compound bead core, wherein the cross section of the compound bead core is hexagonal.
The first impregnating solution is the same as the second impregnating solution, and comprises: 40 parts of softened water, 2 parts of ammonia water with the concentration of 29.5%, 6 parts of resorcinol-formaldehyde resin with the solid content of 75%, 60 parts of butadiene-pyridine latex with the solid content of 41%, 5 parts of formaldehyde with the concentration of 37% and 6 parts of closed isonitrile acid ester with the concentration of 50%.
The single composite bead cord obtained in example 4 was subjected to a breaking strength performance test, and the breaking strength was 5980N.
Comparative example 1
Manufacturing of all-steel-wire bead core
(1) Taking a bead wire with the standard of 2mm and the common strength, sequentially passing through a tension device, a wire preheating device, and then coating a thin layer of rubber compound on the surface of the wire through a die orifice of a screw extruder, so that the bonding capability between the wire and the surface of the wire is improved, and the diameter of the coated wire is 2.12mm.
(2) And winding the encapsulated common steel wire layer by layer on a bead ring disc to form the full steel wire bead core. Comprising the following steps: the single bead wire is first formed into 3 coils adjacent to each other on the circumferential surface of the bead wire disc, forming a first layer; and then continuously winding 4 coils adjacent to each other on the circumferential surface of the bead ring disk to form a second layer overlapped with the first layer in the radial direction of the bead ring disk, repeatedly forming 19 coils to form a bead wire array with five layers arranged in a 3-4-5-4-3 array, and finally winding the joint part by using a film to obtain the all-steel-wire bead core, wherein the cross section of the all-steel-wire bead core is hexagonal.
The single bead wire obtained in comparative example 1 was subjected to a breaking strength performance test, and the breaking strength was 5260N.
The performance parameters of the composite bead cores of examples 3 and 4 and the all-steel wire bead core of comparative example 1 are shown in table 1, and it can be seen from the data in table 1 that the breaking strength of the composite bead core is higher than that of the all-steel wire bead core at the same diameter, but the density of the composite bead core disclosed in the examples of the present application is reduced by 59% compared with that of the all-steel wire bead core, and the weight of the conventional bead is reduced while the mechanical properties are ensured.
Table 1 comparative table of properties of individual composite bead cords and comparative individual bead wire samples of examples
| Sample of | Diameter mm | Linear density g/m | Breaking strength N |
| Example 3 | 2.0 | 9.85 | 5553 |
| Example 4 | 2.1 | 10.25 | 5980 |
| Comparative example 1 | 2.0NT | 24.5 | 5260 |
The composite tire bead core for the tire is prepared by the manufacturing method of the composite tire bead core for the tire, which is disclosed by the embodiment of the application, reduces the weight of a traditional tire bead, ensures that the stress of the tire bead part is more reasonable, improves the service durability of the tire bead, reduces delamination and bulge which are easy to occur at the tire bead part and downwards, adjusts the safety coefficient of the tire bead part, and improves the overall service performance of the tire.
Technical details disclosed in the technical schemes and embodiments disclosed in the application are only illustrative of the inventive concepts of the application and are not limiting of the technical schemes of the application, and all conventional changes, substitutions or combinations of technical details disclosed in the application have the same inventive concepts as the application and are within the scope of protection of the claims of the application.
Claims (8)
1. The composite bead core for the tire is characterized by being manufactured by a composite bead cord, wherein the composite bead cord is provided with a skin core structure formed by braiding a plurality of chemical fiber filaments outside a steel wire core wire;
the manufacturing method of the composite bead core for the tire comprises the following steps:
obtaining a steel wire core wire;
obtaining a plurality of chemical fiber filaments;
forming a strand of yarn by a plurality of chemical fiber filaments, and treating the yarn by impregnating solution;
taking the treated yarns as warp yarns and arranging the warp yarns in parallel with a steel wire core wire; a chemical fiber multifilament with the specification of 200-1000D is not twisted to be used as weft yarn;
shuttling and reciprocating motion of weft yarns among warp yarns, interweaving the warp yarns and the weft yarns to form a closed tubular chemical fiber coating layer with a three-dimensional structure, surrounding the outside of a steel wire core wire, and forming a composite bead cord with a skin-core structure by the closed tubular chemical fiber coating layer and the steel wire core wire;
treating the composite bead cord with a dipping solution;
the composite bead cord after the dipping liquid treatment is continuously wound layer by layer to form the composite bead core with the preset shape for the tire.
2. The composite bead core for a tire according to claim 1, wherein the movement locus of the weft yarn is set as:
taking the left yarn of the cross section of the composite bead cord as an inlet, enabling weft yarn to move to a first latch needle on the right side along with the warp yarn passing through the upper half part of the cross section from the inlet, enabling weft yarn to be padded into a first latch needle hook and then to move back and forth along with the first latch needle to be released from the needle to form a loop, and simultaneously enabling the weft yarn to retract to the inlet along an original path to finish weaving of the upper half part; then, the weft yarn moves to a second latch needle on the right side along with the weft yarn needle passing through the lower half part of the warp yarn of the section from the inlet, the weft yarn is padded into the second latch needle and then is released from the needle to form a loop along with the forward and backward movement of the second latch needle, and simultaneously the weft yarn returns to the inlet along the original path, so that the weaving of the lower half part is completed, and a movement track of the weft yarn winding a steel wire core wire and a plurality of warp yarns for one circle is formed;
repeating the motion trail, and weaving by taking different yarns as inlets until the manufacturing of the composite bead cord is completed.
3. The composite bead core for a tire according to claim 1, wherein treating the yarn with a dipping solution comprises:
impregnating the yarn with an impregnating solution for 100-200 s;
forming a coating on the surface of the yarn through glue extrusion of a die orifice;
the yarn with the coating on the surface is heated and dried at 150-250 ℃.
4. The composite bead core for a tire according to claim 1, wherein a plurality of 200-3000D chemical fiber filaments are twisted and impregnated into one yarn, or a plurality of 200-3000D chemical fiber filaments are combined and impregnated into one yarn.
5. The composite bead core for a tire according to claim 1, wherein treating the composite bead cord with a dipping solution comprises:
impregnating the composite bead cord with impregnating solution for 100-200 s;
extruding glue through a die opening to form a coating on the surface of the composite tire bead cord;
the composite bead cord with the coating on the surface is heated and dried at 150-250 ℃.
6. The composite bead core for a tire according to claim 1, wherein the diameter of the wire core wire is 0.5 to 3mm.
7. The composite bead core for a tire according to claim 1, wherein the impregnating liquid comprises, in parts by mass: 30 to 60 parts of softened water, 0.1 to 2 parts of ammonia water with the concentration of 29.5 percent, 3 to 6 parts of resorcinol-formaldehyde resin with the solid content of 75 percent, 40 to 60 parts of butadiene-pyridine latex with the solid content of 41 percent, 1 to 5 parts of formaldehyde with the concentration of 37 percent and 1 to 6 parts of closed isonitrile acid ester with the concentration of 50 percent.
8. The composite bead core for a tire according to claim 1, wherein the wire core is a single wire or is twisted from a plurality of wires.
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