Tire with multi-layer tire body and belted layer cross-woven structure and preparation method thereof

Abstract

The invention relates to a tire with a multi-layer tire body and belted layer cross-woven structure and a preparation method of the tire, and relates to the technical field of tires. Comprising a bead ring structure, a bead filler layer and a multi-layer carcass and belted layer cross-woven structure, the multi-layer tire body and belted layer cross-woven structure comprises a plurality of layers of tire body woven units and woven belted cord fabric layers which are mutually crossed and attached to the plurality of layers of tire body woven units, the multi-layer tire body weaving unit is divided into a single-layer weaving tire body cord fabric layer and a plurality of double-layer weaving tire body cord fabric layers wrapping the surfaces of the single-layer weaving tire body cord fabric layer and the belt weaving cord fabric layer, and the single-layer weaving tire body cord fabric layer and the double-layer weaving tire body cord fabric layer are endpoint-free tire body cord fabric cylinders formed by continuously weaving cord threads or rubber-coated cord threads in a zigzag mode; and the belted layer woven structures are arranged between every two layers of carcass woven cord fabric layers. According to the invention, the problem of breakpoints of the carcass ply of the traditional tire is effectively solved, so that the carcass and the belt cords can continuously and uniformly transfer loads, the continuity of the tension of a tire framework is ensured, and the rigidity and impact resistance of the tire are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tires, in particular to a tire with a multi-layer carcass and a belt layer cross-woven structure and a preparation method thereof. Background Art

[0002] Tires are composed of skeleton materials and rubber, and are typical cord-rubber composite materials. The cords, as the reinforcement phase, mainly bear the load of the entire structure, and the rubber, as the matrix, plays the role of transferring the load. As the main load-bearing structure of the tire, the skeleton material bears more than 80% of the tension when the tire is inflated. The skeleton material of the tire mainly includes two parts: the carcass and the belt layer. The carcass mainly bears the radial tension of the tire, and the belt layer bears the circumferential tension of the tire. Therefore, the skeleton material determines the tire's load-bearing capacity, rigidity and other properties.

[0003] Chinese patent CN206733966U discloses a radial tire for low-section load-bearing, which respectively adopts a zigzag-wound cross-net structure belt layer and a continuous parallel spiral-wound belt layer, which can greatly reduce the number of belt layer cord joints, effectively constrain the circumferential deformation of the tire during use, optimize the belt layer stress distribution, avoid the discontinuity of the rigidity of the tire belt layer cord, and reduce the probability of damage to the tire shoulder. However, there are still a large number of turn-up endpoints in the tire carcass, resulting in interface bonding defects in the carcass turn-up endpoint area, resulting in holes and cracks in the area in the early use, greatly reducing the service life of the tire; and due to the discontinuity of the rigidity of the cord in this area, the tire's load-bearing capacity is seriously restricted.

[0004] Therefore, how to provide a tire with a multi-layer carcass and belt layer cross-woven structure and a preparation method thereof has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In order to solve at least one technical problem in the background technology, the present invention provides a tire with a multi-layer carcass and belt layer cross-woven structure and a preparation method thereof, which eliminates the continuous cutting points generated in the traditional carcass cord layer manufacturing process, avoids the generation of holes and cracks in the cutting point area, and greatly reduces the number of joints of the belt layer cords, avoids the discontinuity of the stiffness of the tire belt layer cords, and reduces the probability of damage to the tire shoulder area; the present invention enables the skeleton material of the entire tire to form a continuous winding structure, ensures the continuous and uniform transmission of the radial tension and circumferential tension of the tire, and can greatly improve the high-speed performance, impact resistance, load-bearing capacity and service life of the tire.

[0006] To achieve the above-mentioned object, the present invention provides a tire with a multi-layer carcass and belt layer cross-woven structure, comprising a wire bead structure, an apex rubber layer and a multi-layer carcass and belt layer cross-woven structure, wherein the wire bead structure and the apex rubber layer are both arranged inside the multi-layer carcass and belt layer cross-woven structure, and the apex rubber layer is coated on the outside of the wire bead structure;

[0007] The multi-layer carcass and belt layer cross-woven structure includes a multi-layer carcass weaving unit and a woven belt cord layer that crosses and fits with the multi-layer carcass weaving unit, wherein the multi-layer carcass weaving unit is divided into a single-layer carcass weaving cord layer located at the center of the structure and a plurality of double-layer carcass weaving cord layers coated on the surface of the single-layer carcass weaving cord layer and the belt weaving cord layer, the single-layer and double-layer carcass weaving cord layers are endless carcass cord tubes formed by continuous zigzag weaving of cords or rubber-coated cords; the belt layer weaving cord layer is placed between every two carcass weaving cord layers, and is formed by continuous winding of cords or rubber-coated cords around the circumference of the tire at a certain angle.

[0008] Furthermore, it also includes a shoulder rubber pad layer, a sidewall rubber layer and a tread rubber protection layer. An airtight layer is provided on the inner side of the multi-layer carcass and belt layer cross-woven structure, and a multi-layer belt cord layer structure is provided on the outer side of the multi-layer carcass and belt layer cross-woven structure; the shoulder rubber pad layer, the sidewall rubber layer and the tread rubber protection layer are all bonded to the multi-layer carcass and belt layer cross-woven structure, and the multi-layer belt cord layer structure is attached to the outside of the tread lower layer, the tread upper layer and the cap layer.

[0009] Further, the multi-layer carcass and belt layer cross-woven structure includes n+1 carcass weaving units and n layers of woven belt cord layers cross-bonded with the n+1 carcass weaving units, wherein n is 1 to 8; the first carcass weaving unit is located at the center of the multi-layer carcass and belt layer cross-woven structure, the first layer of woven belt cord layers is bonded to the first carcass weaving unit, and the second carcass weaving unit is bonded to the lower surface of the first carcass weaving unit and the upper surface of the first layer of woven belt cord layer unit; and so on, each layer of carcass weaving unit is cross-bonded with the woven belt cord layers, wherein the first layer of carcass weaving unit is a single-layer carcass weaving cord layer, and the second to n+1 layers of carcass weaving units are upper and lower layers of carcass weaving cord layers, and finally a multi-layer carcass and belt layer cross-woven structure is formed in the radial direction of the tire by cross-bonding n layers of belt cord layers and 2n+1 layers of carcass weaving cord layers.

[0010] Furthermore, when the value of n is 3, the multi-layer carcass and belt layer cross-woven structure is formed by cross-bonding 4 carcass weaving units and 3 woven belt cord layers; wherein the carcass weaving units are the 1st carcass weaving unit, the 2nd carcass weaving unit, the 3rd carcass weaving unit and the 4th carcass weaving unit, and the upper and lower sides of the 1st carcass weaving unit are sequentially bonded with the woven belt cord layer unit, the interlayer, the 2nd carcass weaving unit, the 3rd carcass weaving unit and the 4th carcass weaving unit.

[0011] A method for preparing a tire having a multi-layer carcass and a belt layer cross-woven structure comprises the following steps:

[0012] S1, forming a multi-layer carcass and belt layer cross-woven structure by cross-laminating n+1 layers of carcass weaving units and n layers of woven belt cord ply structures;

[0013] S2, weaving K layers of belt ply on the upper surface of the prepared multi-layer carcass and belt layer cross-woven structure, where the value of K is 1 to 8;

[0014] S3. Prepare other structural layers required for tire production: cut corresponding lengths of airtight layer, shoulder rubber layer, sidewall rubber layer, rim cover layer and bead rubber layer, and attach them to the multi-layer carcass and belt layer cross-woven structure and K-layer belt cord layer according to the structural size and position of the tire to obtain a semi-finished component of a rubber tire with a multi-layer carcass and belt layer cross-woven structure; then press the tread rubber layer on the K-layer belt cord layer structure to obtain an unvulcanized green tire of a rubber tire with a multi-layer carcass and belt layer cross-woven structure;

[0015] S4, using a vulcanizer to heat and pressurize the prepared green tire for vulcanization, and after the vulcanization is completed, a tire with a multi-layer carcass and a belt layer cross-woven structure is obtained.

[0016] Furthermore, the manufacturing method of the multi-layer carcass and belt layer cross-woven structure includes:

[0017] S11, first layer carcass braiding unit: two wire rings are fixed in parallel at a certain interval, so that the apex rubber layer is covered on the wire ring along the circumferential direction, a cord with rubber coating on the surface is selected, a certain length is reserved to fix it on one of the apex rubber layers, and then it is wound on the other lower apex rubber layer with a certain tension and angle, so that it is continuously wound 360 degrees along the circumferential direction, and the rubber-coated cord is calendered into a layer by using an extrusion roller, and finally the rubber-coated cord is connected at the calculated connection point to form the first layer of braided carcass cord tube;

[0018] S12, covering the upper and lower surfaces of the prepared first layer of woven carcass cord tube with a rubber layer, and inflating the interior so that its outer contour expands to the shape of the woven carcass cord layer;

[0019] S13, first layer of woven belt cord layer: prepare a cord, cover the surface with rubber, fix one end of the cord on the first layer of woven carcass cord layer with the rubber layer on the surface, the fixing point is the preset position of one end of the belt layer, and circumferentially wind along the outer side of the first layer of carcass braiding unit with the rubber layer on the surface with a certain tension and angle until the braiding width reaches the set belt layer width, so as to form the first layer of woven belt cord tube;

[0020] S14, second carcass braiding unit: the upper surface of the first woven belt cord layer is covered with a rubber layer, a rubber-coated cord is selected, a certain length is reserved, one end is fixed on the tread center line of the first woven belt cord layer with the surface covered with the rubber layer, the cord is woven with a certain tension and angle on the upper surface of the first woven belt cord layer covered with the rubber layer and the lower surface of the first carcass braiding unit covered with the rubber layer, and pressed at the same time, and finally the rubber-coated cord is connected at the calculated connection point, so that the second carcass braiding unit is manufactured, which can be divided into upper and lower layers along the radial direction of the tire;

[0021] S15, the weaving method of the woven belt cord layer and the woven carcass cord layer of steps S13 and S14, cross-laminating n layers of woven belt cord layers and n+1 layers of carcass weaving units in sequence, and finally forming a multi-layer carcass and belt layer cross-woven structure composed of 2n+1 layers of carcass woven cord layers cross-laminated with n layers of woven belt cord layers in the radial direction of the tire.

[0022] Furthermore, the winding angle of a single cord in each layer of the woven carcass cord layer is 0.1° to 3° or -0.1° to -3° with the axial direction of the tire, and the winding angle of the woven belt cord layer is 0.1° to 30° or -0.1° to -30° with the tread center plane of the tire.

[0023] Furthermore, the winding angles of the woven carcass cord layers should maintain a symmetrical relationship, including the angles of the upper cords of each carcass layer being opposite to the angles of the lower cords; or the angles of the upper cords of each carcass layer being opposite to the adjacent upper cords, and the angles of the lower cords of each carcass layer being opposite to the adjacent lower cords.

[0024] Furthermore, the number of structural layers of the woven belt plies in the multi-layer cross-laminated carcass woven units and the K-layer belt plies is an even number, and the winding angles of two adjacent woven belt plies are opposite.

[0025] Furthermore, the braided carcass cord layer and the braided belt cord layer are formed by continuously and evenly winding a cord tape consisting of a single rubber-coated cord or a plurality of rubber-coated cords to form a cord tube.

[0026] Furthermore, the cords of the braided carcass ply and the braided belt ply include steel wire, nylon, aramid or a mixed material of nylon and aramid.

[0027] Furthermore, the wire ring structure in the single-layer woven carcass cord layer is formed by winding and weaving multiple steel wires, wherein the core of the wire ring structure is a circular closed steel wire, and the outer layer of the core is wound and woven with multiple layers of steel wire or nylon, aramid, and nylon and aramid mixed materials, and the circumferential cross-sectional shape of the formed wire ring structure includes triangle, rectangle, circle, and regular hexagon.

[0028] Furthermore, after the rubber-coated cords in the carcass braiding unit are continuously braided, the braiding end point will return to the starting position, and the starting point and the end point are connected in two ways: butt joint and overlap.

[0029] Furthermore, the starting position of continuous weaving of the cords in the carcass weaving unit after rubber coating is determined by finite element analysis or a tension calculation formula.

[0030] Furthermore, the stress distribution of the carcass braiding unit under inflation and load conditions is calculated using the finite element method, and the position where the carcass cord tension is the smallest is selected as the starting position for continuous braiding of the carcass braiding unit.

[0031] Furthermore, the thickness of the rubber-coated cords continuously woven in the carcass braiding unit and the braided belt cord layer is 0.5-2 times the cord diameter D.

[0032] Furthermore, the apex rubber layer is arranged along the circumference of the wire ring structure, and the directions include radial and axial directions along the wire ring.

[0033] Furthermore, the carcass braiding unit and the braided belt cord layer are formed by continuously and evenly winding a cord tape consisting of a single rubber-coated cord or a plurality of rubber-coated cords to form a cord tube.

[0034] Furthermore, the cords in the cord belt composed of the plurality of rubber-coated cords are evenly distributed, the distribution interval is determined by the tire structure design, and the number of cords is 2-8.

[0035] Furthermore, the carcass braiding unit and the braided belt cord layer are directly bonded, or an adhesive layer is provided, and the thickness H of the adhesive layer is greater than the diameter D of the carcass cord.

[0036] The beneficial effects of the present invention are:

[0037] 1. The present invention not only improves the rigidity and impact resistance of the tire, but also suppresses the standing wave phenomenon generated when the tire rotates at high speed, thereby increasing the service life of the tire when running at high speed; a stable and continuous force transmission structure is established, the force transmission between the wire ring and the carcass, and between the carcass and the belt layer is strengthened, and the rigidity of the overall tire structure is improved.

[0038] 2. The present invention eliminates the continuous cutting points generated by the traditional carcass ply through calendering, cutting, splicing and other manufacturing processes by providing a woven carcass ply, avoiding the situation where there is no coating on the cutting point and the rubber cannot be effectively bonded, preventing holes and cracks from appearing at the cutting point during tire driving, and preventing the carcass cord from being pulled out when the tire is subjected to impact loads. The internal cord tension of the woven carcass ply and the woven belt ply is continuous, which improves the load-bearing capacity and service life of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the structure of a tire having a multi-layer carcass and a belt layer cross-woven structure according to the present invention;

[0040] Figure 2 A schematic diagram comparing a conventional rubber tire structure and the tire structure of the present invention;

[0041] Figure 3 A schematic diagram of winding a single-layer woven carcass cord layer of a tire having a multi-layer carcass and belt layer cross-woven structure in the present invention;

[0042] Figure 4 A schematic diagram of the cord arrangement angle of a single-layer woven carcass cord layer of a tire having a multi-layer carcass and belt layer cross-woven structure in the present invention;

[0043] Figure 5 It is a schematic structural diagram of a single-layer woven carcass cord layer of a tire having a multi-layer carcass and belt layer cross-woven structure in the present invention;

[0044] Figure 6 It is a schematic diagram of winding a double-layer braided carcass cord layer of a tire having a multi-layer carcass and belt layer cross-braided structure in the present invention;

[0045] Figure 7 A schematic diagram of the cord arrangement angle of a double-layer braided carcass ply of a tire having a multi-layer carcass and belt layer cross-braided structure in the present invention;

[0046] Figure 8 It is a schematic structural diagram of a double-layer braided carcass cord layer of a tire having a multi-layer carcass and belt layer cross-braided structure in the present invention;

[0047] Fig. 9 Schematic diagram of the structure of a single-layer and double-layer braided carcass ply of a tire with a multi-layer carcass and belt layer cross-braided structure in the present invention (the green line represents the cord of the single-layer braided carcass ply, and the red line represents the cord of the double-layer braided carcass ply);

[0048] Fig.10It is a schematic structural diagram of a double-layer braided carcass cord layer of a tire having a multi-layer carcass and belt layer cross-braided structure in the present invention;

[0049] Fig.11 A schematic diagram of winding a belt braided cord layer of a tire having a multi-layer carcass and a belt layer cross-braided structure in the present invention;

[0050] Fig.12 It is a schematic diagram of the arrangement of the apex rubber layer on the wire ring of a tire with a multi-layer carcass and a belt layer cross-woven structure in the present invention;

[0051] Fig.13 It is a schematic diagram of a cord belt composed of a single cord coated with rubber and multiple cords coated with rubber;

[0052] Fig.14 The stress distribution of the three tires in Example 1.

[0053] Fig.15 The stress distribution of three tires with different structures in Example 2.

[0054] Among them, 1-wire ring structure, 2-triangular rubber layer, 3-multi-layer carcass and belt layer cross-woven structure, 4-sidewall rubber layer, 5-shoulder rubber layer, 6-tread lower layer, 7-tread upper layer, 8-cap layer, 9-multi-layer belt cord layer structure, 10-airtight layer, 11-bead protective rubber layer, 12-1st layer of woven carcass cord layer, 13-2nd layer of woven carcass cord layer, 14-3rd layer of woven carcass cord layer, 15-4th layer of woven carcass cord layer, 16-woven belt cord layer, 17-interlayer rubber. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0057] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0058] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0059] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] In order to improve the impact resistance and load capacity of existing tires, the present invention proposes a tire with a multi-layer carcass and belt layer cross-woven structure. The carcass cord layer of the tire adopts a continuous winding technology, abandons the continuous cutting points generated in the traditional carcass cord layer manufacturing process, and couples the continuous winding technology of the belt cord layer cord to cross-fit the carcass and the belt cord layer to form a multi-layer woven cord layer structure, so that the skeleton material of the entire tire forms a continuous winding structure, ensuring the continuous and uniform transmission of the radial tension and circumferential tension of the tire, which can greatly improve the high-speed performance, impact resistance, load-bearing capacity and service life of the tire.

[0061] To achieve the above purpose, Figure 1 As shown, the present invention provides a tire with a multi-layer carcass and belt layer cross-woven structure, comprising a wire bead structure 1, an apex rubber layer 2 and a multi-layer carcass and belt layer cross-woven structure 3, wherein the wire bead structure 1 and the apex rubber layer 2 are both arranged inside the multi-layer carcass and belt layer cross-woven structure 3, and the apex rubber layer 2 is coated on the outside of the wire bead structure 1;

[0062] The multi-layer carcass and belt layer cross-woven structure includes a multi-layer carcass weaving unit and a woven belt cord layer that crosses and fits with the multi-layer carcass weaving unit, wherein the multi-layer carcass weaving unit is divided into a single-layer carcass weaving cord layer located at the center of the structure and a plurality of double-layer carcass weaving cord layers coated on the surface of the single-layer carcass weaving cord layer and the belt weaving cord layer, the single-layer and double-layer carcass weaving cord layers are endless carcass cord tubes formed by continuous zigzag weaving of cords or rubber-coated cords; the belt layer weaving cord layer is placed between every two carcass weaving cord layers, and is formed by continuous winding of cords or rubber-coated cords around the circumference of the tire at a certain angle.

[0063] The present invention also includes a shoulder rubber pad 5, a sidewall rubber layer 4 and a tread rubber protection layer 11. An airtight layer 10 is provided on the inner side of the multi-layer carcass and belt layer cross-woven structure 3, and a multi-layer belt cord layer structure 9 is provided on the outer side of the multi-layer carcass and belt layer cross-woven structure 3; the shoulder rubber pad 5, the sidewall rubber layer 4 and the tread rubber protection layer 11 are all bonded to the multi-layer carcass and belt layer cross-woven structure 3, and the multi-layer belt cord layer structure 9 is attached with a tread lower layer 6, a tread upper layer 7 and a cap layer 8.

[0064] To further optimize the technical solution, the multi-layer carcass and belt layer cross-woven structure 3 includes n+1 carcass weaving units and n layers of woven belt cord layers cross-bonded with the n+1 carcass weaving units, wherein n is 1 to 8; the first carcass weaving unit is located at the center of the multi-layer carcass and belt layer cross-woven structure 3, the first layer of woven belt cord layers is bonded to the first carcass weaving unit, and the second carcass weaving unit is bonded to the lower surface of the first carcass weaving unit and the upper surface of the first layer of woven belt cord layer unit; and so on, each layer of carcass weaving unit is cross-bonded with the woven belt cord layers, wherein the first layer of carcass weaving unit is a single-layer carcass weaving cord layer, and the second to n+1 layers of carcass weaving units are upper and lower layers of carcass weaving cord layers, and finally a multi-layer carcass and belt layer cross-woven structure is formed in the radial direction of the tire by cross-bonding n layers of belt cord layers and 2n+1 layers of carcass weaving cord layers.

[0065] To further optimize the technical solution, when the value of n is 3, the multi-layer carcass and belt layer cross-woven structure 3 is composed of 4 carcass weaving units and 3 woven belt cord layers 16 cross-laminated; wherein the carcass weaving units are the first carcass weaving unit 12, the second carcass weaving unit 13, the third carcass weaving unit 14 and the fourth carcass weaving unit 15, and the upper and lower sides of the first carcass weaving unit 12 are sequentially laminated with the woven belt cord layer unit 16, the interlayer 17, the second carcass weaving unit 13, the third carcass weaving unit 14 and the fourth carcass weaving unit 15. Figure 2 (a) is the traditional rubber tire structure, Figure 2 (b) A tire having a multi-layer carcass and belt layer cross-woven structure, wherein the multi-layer carcass and belt layer cross-woven structure is composed of two layers of woven carcass cord layers and one layer of woven belt cord layers cross-laminated; Figure 2 (c) a multi-layer carcass and belt layer cross-woven structure with two layers of woven belt cord plies; Figure 2 (d) is a multi-layer carcass and belt layer cross-woven structure with three layers of woven belt cord layers.

[0066] The present invention also provides a method for preparing a tire having a multi-layer carcass and a belt layer cross-woven structure, comprising the following steps:

[0067] S1, forming a multi-layer carcass and belt layer cross-woven structure 3 by cross-laminating n+1 layers of carcass weaving units and n layers of woven belt cord layer structures;

[0068] S2, weaving K layers of belt ply on the upper surface of the prepared multi-layer carcass and belt layer cross-woven structure 3, where the value of K is 1 to 8;

[0069] S3. Prepare other structural layers required for tire production: cut corresponding lengths of airtight layer, shoulder rubber layer, sidewall rubber layer, rim cover layer and bead rubber layer, and attach them to the multi-layer carcass and belt layer cross-woven structure and K-layer belt cord layer according to the structural size and position of the tire to obtain a semi-finished component of a rubber tire with a multi-layer carcass and belt layer cross-woven structure; then press the tread rubber layer on the K-layer belt cord layer structure to obtain an unvulcanized green tire of a rubber tire with a multi-layer carcass and belt layer cross-woven structure;

[0070] S4, using a vulcanizer to heat and pressurize the prepared green tire for vulcanization, and after the vulcanization is completed, a tire with a multi-layer carcass and a belt layer cross-woven structure is obtained.

[0071] To further optimize the technical solution, the manufacturing method of the multi-layer carcass and belt layer cross-woven structure includes:

[0072] S11, the first layer of carcass braiding unit: fix two steel wire rings in parallel at a certain interval, so that the apex rubber layer is covered on the steel wire ring along the circumferential direction, select a cord with rubber coating on the surface, reserve a length to fix it on one of the apex rubber layers, and then wind it to the other lower apex rubber layer with a certain tension and angle, so that it is continuously wound 360 degrees along the circumferential direction, and at the same time, the rubber-coated cord is calendered into a layer using an extrusion roller, and finally the rubber-coated cord is connected at the calculated connection point to form the first layer of braided carcass cord tube, such as Figure 3 As shown;

[0073] S12, covering the upper and lower surfaces of the prepared first layer of woven carcass cord tube with a rubber layer, and inflating the interior so that its outer contour expands to the shape of the woven carcass cord layer;

[0074] S13, first layer of woven belt cord layer: prepare a cord, cover the surface with rubber, fix one end of the cord on the first layer of woven carcass cord layer with the rubber layer on the surface, the fixing point is the preset position of one end of the belt layer, and circumferentially wind along the outer side of the first layer of carcass braiding unit with the rubber layer on the surface with a certain tension and angle until the braiding width reaches the set belt layer width, so as to form the first layer of woven belt cord tube;

[0075] S14, second carcass braiding unit: the upper surface of the first woven belt cord layer is covered with a rubber layer, a rubber-coated cord is selected, a certain length is reserved, one end is fixed on the tread center line of the first woven belt cord layer with the surface covered with the rubber layer, the cord is woven with a certain tension and angle on the upper surface of the first woven belt cord layer covered with the rubber layer and the lower surface of the first carcass braiding unit covered with the rubber layer, and pressed at the same time, and finally the rubber-coated cord is connected at the calculated connection point, so that the second carcass braiding unit is manufactured, which can be divided into upper and lower layers along the radial direction of the tire;

[0076] S15, the weaving method of the woven belt cord layer and the woven carcass cord layer in steps S13 and S14, sequentially cross-laminate n layers of woven belt cord layers and n+1 layers of carcass weaving units, and finally form a multi-layer carcass and belt layer cross-woven structure composed of 2n+1 layers of carcass woven cord layers and n layers of woven belt cord layers cross-laminated in the radial direction of the tire, such as Fig. 9 Fig.10 and Fig.11 (a) Fig.11 (b) as shown.

[0077] To further optimize the technical solution, the winding angle of a single cord in the braided carcass ply is 0.1° to 3° or -0.1° to -3° with the axial direction of the tire, such as Figure 4 and Figure 5 (a) Figure 5The angle of the woven belt cord layer is 0.1° to 30° or -0.1° to -30° with the center plane of the tire tread. Figure 7 and Figure 8 (a) Figure 8 (b) as shown.

[0078] To further optimize the technical solution, the winding angles of the woven carcass cord layers should maintain a symmetrical relationship, including the angles of the upper cords of each carcass layer being opposite to the angles of the lower cords; or the angles of the upper cords of each carcass layer being opposite to the angles of the adjacent upper cords, and the angles of the lower cords of each carcass layer being opposite to the angles of the adjacent lower cords.

[0079] To further optimize the technical solution, the number of layers of the multi-layer cross-laminated woven belt cord layer structure and the woven belt cord layer structure in the K-layer belt cord layer is an even number, and the winding angles of two adjacent layers of the woven belt cord layer structure are opposite.

[0080] To further optimize the technical solution, the carcass weaving unit and the weaving belt cord layer are formed by continuously and evenly winding a cord tape composed of a single rubber-coated cord or a plurality of rubber-coated cords to form a cord tube.

[0081] To further optimize the technical solution, the wire ring structure in the single-layer woven carcass cord layer is formed by winding and weaving multiple steel wires, wherein the core of the wire ring structure is a circular closed steel wire, and the outer layer of the core is wound and woven with multiple layers of steel wire or nylon, aramid, and nylon and aramid mixed materials, and the circumferential cross-sectional shapes of the formed wire ring structure include triangles, rectangles, circles, and regular hexagons.

[0082] To further optimize the technical solution, after the rubber-coated cords in the carcass weaving unit are continuously woven, the weaving end point will return to the starting position, and the starting point and the end point are connected by butt-jointing and overlapping.

[0083] To further optimize the technical solution, the starting position of continuous weaving of the cords in the carcass weaving unit after rubber coating is determined by finite element analysis or a tension calculation formula.

[0084] To further optimize the technical solution, the finite element method was used to calculate the stress distribution of the carcass braiding unit under inflation and load conditions, and the position with the minimum carcass cord tension was selected as the starting position for continuous weaving of the carcass braiding unit.

[0085] To further optimize the technical solution, the thickness of the continuously woven rubber-coated cords in the carcass weaving unit and the weaving belt cord layer is 0.5-2 times the cord diameter D.

[0086] To further optimize the technical solution, the apex rubber layer 2 is arranged along the circumference of the wire ring structure 1, and the directions include radial and axial directions of the wire ring, such as Fig.12(a) and 12(b).

[0087] Further optimizing the technical solution, the braided carcass cord layer and the braided belt cord layer adopt a single rubber-coated cord (such as Fig.13 (a)) or multiple rubber-coated cords (such as Fig.13 The cord tape composed of the cord tape (as shown in (b)) is continuously and evenly wound to form a cord tube.

[0088] To further optimize the technical solution, the cords in the cord belt composed of multiple rubber-coated cords are evenly distributed, the distribution interval is determined by the tire structure design, and the number of cords is 2 to 8.

[0089] To further optimize the technical solution, the cords of the braided carcass cord layer and the braided belt cord layer include materials such as steel wire, nylon, aramid, or a mixture of nylon and aramid.

[0090] To further optimize the technical solution, the carcass braiding unit and the braided belt cord layer can be directly bonded, or an adhesive layer can be provided, and the thickness H of the adhesive layer is greater than the diameter D of the carcass cord.

[0091] The present invention not only improves the rigidity and impact resistance of the tire, but also suppresses the standing wave phenomenon generated when the tire rotates at high speed, thereby increasing the service life of the tire when driving at high speed; a stable and continuous force transmission structure is established, the force transmission between the wire ring and the carcass, and between the carcass and the belt layer is strengthened, and the rigidity of the overall structure of the tire is improved. In the present invention, by setting a woven carcass cord layer, the continuous cutting points generated by the traditional carcass cord layer through the manufacturing processes such as calendering, cutting, and splicing are eliminated, and the situation that there is no coating on the cutting point and it cannot be effectively bonded with the rubber is avoided, and holes and cracks are prevented from appearing at the cutting point during the driving of the tire, and the carcass cord is pulled out when the tire is subjected to impact loads. The internal cord tension of the woven carcass cord layer and the woven belt cord layer is continuous, which improves the load-bearing capacity and service life of the tire.

[0092] Embodiment 1:

[0093] The present invention proposes a tire with a multi-layer carcass and belt layer cross-woven structure, and finite element analysis is performed on the tire with a multi-layer carcass and belt layer cross-woven structure proposed by the present invention and a traditional multi-layer carcass ply tire. The traditional multi-layer carcass ply tire used has 7 carcass ply layers and 8 belt ply layers. Two types of tires with multi-layer carcass and belt layer cross-woven structures were used. One is a multi-layer carcass and belt layer cross-woven structure with four layers of woven carcass cord layers (seven layers of carcass cord layers along the radial direction of the tire), and the multi-layer carcass and belt layer cross-woven structure is covered with 8 layers of belt cord layers, which is recorded as tire one (the structural form of this tire is the same as that of the tire with cord tension continuity structure); the second is a multi-layer carcass and belt layer cross-woven structure with 4 layers of woven carcass cord layers (7 layers of carcass cord layers along the radial direction of the tire) and 3 layers of woven belt cord layers, and the multi-layer carcass and belt layer cross-woven structure is covered with five layers of belt cord layers, which is recorded as tire two; the materials used in each tire are the same, and the inflation pressure is set to 1.59Mpa. After the tire is inflated, an analytical rigid road surface is set, and the road surface is moved to compress the tire. The inflation radius of the tire is compressed to 550mm, and the support reaction force on the road surface is measured. The stress cloud diagrams of the three tires after loading are shown as follows. Fig.14 (a) Fig.14 (b) with Fig.14 (c), where Fig.14 (a) is the stress cloud diagram of the traditional tire after loading. Fig.14 (b) is the stress cloud diagram of the tire after loading. Fig.14 (c) is the stress cloud diagram of tire 2 after loading, and its related data are shown in Table 1.

[0094]

[0095] Table 1

[0096] Analysis of the calculated data in Table 1 shows that: under the same inflation pressure, the outer diameter of the tire 2 with a multi-layer carcass and belt layer cross-woven structure is 2.24% smaller than that of the traditional tire; when the tire is loaded, the corresponding sinking amount and support reaction force are measured. According to the data, the changes in the radial stiffness of the three tires can be obtained. Compared with the traditional multi-layer carcass cord layer tire, the radial stiffness of the tire 1 with a multi-layer carcass and belt layer cross-woven structure increases by 49.04%, and the radial stiffness of the tire 2 with a multi-layer carcass and belt layer cross-woven structure increases by 68.58%. In summary, it is found that the tire with a multi-layer carcass and belt layer cross-woven structure invented by the patent of this invention has a skeleton material that forms a continuous force transmission structure, realizes the continuous transmission of load, and can greatly improve the stiffness and load capacity of the tire.

[0097] Embodiment 2:

[0098] In order to verify the influence of the woven belt cord layer and the number of coated layers in the multi-layer carcass and belt cross-woven structure on the tire performance, the finite element calculation results of the tires with one belt cord layer, two belt cord layers, and three belt cord layers in the multi-layer carcass and belt cross-woven structure are compared. The boundary conditions and load forms of the calculation are the same as those in Example 1.

[0099] Among them, the tire three with one belt ply and two carcass ply in a multi-layer carcass and belt layer cross-woven structure is defined; the tire four with two belt ply and three carcass ply; the tire five with three belt ply and four carcass ply is defined, and the finite element analysis is performed on them. The results are compared. Fig.15 (a) Fig.15 (b) with Fig.15 (c) Fig.15 (a) Fig.15 (b) with Fig.15 (c) are the stress cloud diagrams of tires 3, 4 and 5 after loading. The relevant data are shown in Table 2.

[0100]

[0101] Table 2

[0102] Analysis of the above results shows that as the number of carcass plies and their covered belt plies in the multi-layer carcass and belt layer cross-woven structure increases, their inflated outer diameter and inflated cross-sectional width gradually decrease, but the change amplitude is not large; at the same time, the radial stiffness of the tire also increases, and the change amplitude is also very small.

[0103] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A tire having a multi-layer carcass and a belt layer cross-woven structure, characterized in that: The invention comprises a wire ring structure (1), a apex rubber layer (2) and a multi-layer carcass and belt layer cross-woven structure (3), wherein the wire ring structure (1) and the apex rubber layer (2) are both arranged inside the multi-layer carcass and belt layer cross-woven structure (3), and the apex rubber layer (2) is coated on the outside of the wire ring structure (1); The multi-layer carcass and belt layer cross-woven structure includes a multi-layer carcass weaving unit and a woven belt cord layer that crosses and fits with the multi-layer carcass weaving unit, wherein the multi-layer carcass weaving unit is divided into a single-layer carcass weaving cord layer located at the center of the structure and a plurality of double-layer carcass weaving cord layers coated on the surface of the single-layer carcass weaving cord layer and the belt weaving cord layer, the single-layer and double-layer carcass weaving cord layers are endless carcass cord tubes formed by continuous zigzag weaving of cords or rubber-coated cords; the belt layer weaving cord layer is placed between every two carcass weaving cord layers, and is formed by continuous winding of cords or rubber-coated cords around the circumference of the tire at a certain angle.

2. A tire with a multi-layer carcass and belt layer cross-woven structure as claimed in claim 1, characterized in that: The tire also includes a shoulder rubber pad layer (5), a sidewall rubber layer (4) and a tread rubber protection layer (11); an airtight layer (10) is provided on the inner side of the multi-layer carcass and belt layer cross-woven structure (3); a multi-layer belt cord layer structure (9) is provided on the outer side of the multi-layer carcass and belt layer cross-woven structure (3); the shoulder rubber pad layer (5), the sidewall rubber layer (4) and the tread rubber protection layer (11) are all bonded to the multi-layer carcass and belt layer cross-woven structure (3); the multi-layer belt cord layer structure (9) is attached with a tread lower layer (6), a tread upper layer (7) and a cap layer (8).

3. A tire with a multi-layer carcass and belt layer cross-woven structure as claimed in claim 1 or 2, characterized in that: The multi-layer carcass and belt layer cross-woven structure (3) comprises n+1 carcass weaving units and n-layer woven belt cord layers cross-laminated with the n+1 carcass weaving units, wherein n is 1 to 8; the first carcass weaving unit is located at the center of the multi-layer carcass and belt layer cross-woven structure (3), the first woven belt cord layer is laminated on the first carcass weaving unit, and the second carcass weaving unit is laminated on the lower surface of the first carcass weaving unit and the upper surface of the first woven belt cord layer unit; and so on, each carcass weaving unit is cross-laminated with the woven belt cord layers, wherein the first carcass weaving unit is a single carcass weaving cord layer, and the second to n+1 carcass weaving units are upper and lower carcass weaving cord layers, and finally a multi-layer carcass and belt layer cross-woven structure is formed in the radial direction of the tire by cross-laminated n-layer belt cord layers and 2n+1-layer carcass weaving cord layers.

4. A tire with a multi-layer carcass and belt layer cross-woven structure as claimed in claim 3, characterized in that: When the value of n is 3, the multi-layer carcass and belt layer cross-woven structure (3) is formed by cross-bonding 4 carcass braiding units and 3 woven belt cord layers (16); wherein the carcass braiding units are respectively a first carcass braiding unit (12), a second carcass braiding unit (13), a third carcass braiding unit (14) and a fourth carcass braiding unit (15); and the upper and lower sides of the first carcass braiding unit (12) are sequentially bonded with a woven belt cord layer unit (16), a laminate (17), a second carcass braiding unit (13), a third carcass braiding unit (14) and a fourth carcass braiding unit (15).

5. A method for preparing a tire having a multi-layer carcass and a belt layer cross-woven structure, characterized in that: The steps include: S1, forming a multi-layer carcass and belt layer cross-woven structure (3) by cross-laminating n+1 layers of carcass weaving units and n layers of woven belt cord layer structures; S2, weaving K layers of belt ply on the upper surface of the prepared multi-layer carcass and belt layer cross-woven structure (3), where the value of K is 1 to 8; S3. Prepare other structural layers required for tire production: cut corresponding lengths of airtight layer, shoulder rubber layer, sidewall rubber layer, rim cover layer and bead rubber layer, and attach them to the multi-layer carcass and belt layer cross-woven structure and K-layer belt cord layer according to the structural size and position of the tire to obtain a semi-finished component of a rubber tire with a multi-layer carcass and belt layer cross-woven structure; then press the tread rubber layer on the K-layer belt cord layer structure to obtain an unvulcanized green tire of a rubber tire with a multi-layer carcass and belt layer cross-woven structure; S4, using a vulcanizer to heat and pressurize the prepared green tire for vulcanization, and after the vulcanization is completed, a tire with a multi-layer carcass and a belt layer cross-woven structure is obtained.

6. The method for preparing a tire with a multi-layer carcass and belt layer cross-woven structure as claimed in claim 5, characterized in that: The manufacturing method of the multi-layer carcass and belt layer cross-woven structure includes: S11, first layer carcass braiding unit: two wire rings are fixed in parallel at a certain interval, so that the apex rubber layer is covered on the wire ring along the circumferential direction, a cord with rubber coating on the surface is selected, a certain length is reserved to fix it on one of the apex rubber layers, and then it is wound on the other lower apex rubber layer with a certain tension and angle, so that it is continuously wound 360 degrees along the circumferential direction, and the rubber-coated cord is calendered into a layer by using an extrusion roller, and finally the rubber-coated cord is connected at the calculated connection point to form the first layer of braided carcass cord tube; S12, covering the upper and lower surfaces of the prepared first layer of woven carcass cord tube with a rubber layer, and inflating the interior so that its outer contour expands to the shape of the woven carcass cord layer; S13, first layer of woven belt cord layer: prepare a cord, cover the surface with rubber, fix one end of the cord on the first layer of woven carcass cord layer with the rubber layer on the surface, the fixing point is the preset position of one end of the belt layer, and circumferentially wind along the outer side of the first layer of carcass braiding unit with the rubber layer on the surface with a certain tension and angle until the braiding width reaches the set belt layer width, so as to form the first layer of woven belt cord tube; S14, second carcass braiding unit: the upper surface of the first woven belt cord layer is covered with a rubber layer, a rubber-coated cord is selected, a certain length is reserved, one end is fixed on the tread center line of the first woven belt cord layer with the surface covered with the rubber layer, the cord is woven with a certain tension and angle on the upper surface of the first woven belt cord layer covered with the rubber layer and the lower surface of the first carcass braiding unit covered with the rubber layer, and pressed at the same time, and finally the rubber-coated cord is connected at the calculated connection point, so that the second carcass braiding unit is manufactured, which can be divided into upper and lower layers along the radial direction of the tire; S15, the weaving method of the woven belt cord layer and the woven carcass cord layer of steps S13 and S14, cross-laminating n layers of woven belt cord layers and n+1 layers of carcass weaving units in sequence, and finally forming a multi-layer carcass and belt layer cross-woven structure composed of 2n+1 layers of carcass woven cord layers cross-laminated with n layers of woven belt cord layers in the radial direction of the tire.

7. The method for preparing a tire having a multi-layer carcass and belt layer cross-woven structure as claimed in claim 6, characterized in that: The winding angle of a single cord in each layer of the woven carcass cord layer is 0.1° to 3° or -0.1° to -3° with the axial direction of the tire, and the winding angle of the woven belt cord layer is 0.1° to 30° or -0.1° to -30° with the tread center plane of the tire.

8. A method for preparing a tire having a multi-layer carcass and belt layer cross-woven structure as claimed in claim 6 or 7, characterized in that: The winding angles of the woven carcass cord layers should maintain a symmetrical relationship, including that the angle of each carcass upper cord layer is opposite to that of the lower cord layer; or the angle of each carcass upper cord layer is opposite to that of its adjacent upper cord layer, and the angle of each carcass lower cord layer is opposite to that of its adjacent lower cord layer.

9. The method for preparing a tire having a multi-layer carcass and belt layer cross-woven structure as claimed in claim 8, characterized in that: The number of structural layers of the woven belt plies in the multi-layer cross-laminated carcass woven units and the K-layer belt plies is an even number, and the winding angles of two adjacent woven belt plies are opposite.

10. The method for preparing a tire having a multi-layer carcass and belt layer cross-woven structure according to claim 6, characterized in that: The braided carcass cord layer and the braided belt cord layer are formed by continuously and evenly winding a cord tape composed of a single rubber-coated cord or a plurality of rubber-coated cords to form a cord tube.

11. The method for preparing a tire having a multi-layer carcass and belt layer cross-woven structure according to claim 10, characterized in that: The cords of the braided carcass cord layer and the braided belt cord layer include steel wire, nylon, aramid or a mixed material of nylon and aramid.

12. The method for preparing a tire having a multi-layer carcass and belt layer cross-woven structure according to claim 6, characterized in that: The wire ring structure in the single-layer woven carcass cord layer is formed by winding and weaving multiple steel wires, wherein the core of the wire ring structure is a circular closed steel wire, and the outer layer of the core is wound and woven with multiple layers of steel wire or nylon, aramid, and nylon and aramid mixed materials, and the circumferential cross-sectional shape of the formed wire ring structure includes triangle, rectangle, circle, and regular hexagon.

13. The method for preparing a tire having a multi-layer woven cord layer cross-laminated structure according to claim 6, characterized in that: After the rubber-coated cords in the carcass braiding unit are continuously braided, the braiding end point will return to the starting position, and the starting point and the end point are connected in two ways: butt joint and overlap.

14. The method for preparing a tire having a multi-layer woven cord layer cross-laminated structure according to claim 6, characterized in that: The starting position of continuous weaving of the cords in the carcass weaving unit after rubber coating is determined by finite element analysis or a tension calculation formula.

15. The method for preparing a tire having a multi-layer woven cord layer cross-laminated structure according to claim 14, characterized in that: The stress distribution of the carcass braiding unit under inflation and load conditions was calculated using the finite element method, and the position with the minimum tension of the carcass cord was selected as the starting position for continuous braiding of the carcass braiding unit.

16. The method for preparing a tire having a multi-layer woven cord layer cross-laminated structure according to claim 6, characterized in that: The thickness of the rubber-coated cords continuously woven in the carcass woven unit and the woven belt cord layer is 0.5-2 times of the cord diameter D.

17. The method for preparing a tire having a multi-layer woven cord layer cross-laminated structure according to claim 6, characterized in that: The apex rubber layer (2) is arranged along the circumference of the wire ring structure (1), and the direction includes along the radial direction and axial direction of the wire ring.

18. The method for preparing a tire having a multi-layer woven cord layer cross-laminated structure according to claim 6, characterized in that: The carcass braiding unit and the braided belt cord layer are formed by continuously and evenly winding a cord tape composed of a single rubber-coated cord or a plurality of rubber-coated cords to form a cord tube.

19. The method for preparing a tire having a multi-layer woven cord layer cross-laminated structure according to claim 6, characterized in that: The cords in the cord belt composed of the plurality of rubber-coated cords are evenly distributed, the distribution interval is determined by the tire structure design, and the number of cords is 2-8.

20. The method for preparing a tire having a multi-layer woven cord layer cross-laminated structure according to claim 6, characterized in that: The carcass braiding unit and the braided belt cord layer are directly bonded, or an adhesive layer is provided, and the thickness H of the adhesive layer is greater than the diameter D of the carcass cord.

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