Tire structure with continuous tire body cord thread and belt cord thread tension and manufacturing method thereof

Abstract

The invention relates to the technical field of tires, in particular to a tire structure with continuous tire body cord thread and belt cord thread tension and a manufacturing method of the tire structure. Comprising a multi-layer carcass cord tension continuity structure and a multi-layer belt cord tension continuity structure, a steel wire ring, a bead filler layer and a steel wire ring wrapping cloth layer are wrapped in the multi-layer carcass cord tension continuity structure, and the multi-layer belt cord tension continuity structure is attached to the outer side of the multi-layer carcass cord tension continuity structure. According to the invention, the problem of breakpoints of the carcass ply and the belted ply ply of the traditional tire can be effectively solved, so that the carcass and the belted ply cords can continuously transmit tension, and the radial and circumferential deformation of the tire is controlled.

Description

Technical Field

[0001] The invention relates to the technical field of tires, and in particular to a tire structure with continuous tension of carcass cords and belt cords and a manufacturing method thereof. Background Art

[0002] Traditional all-steel radial load-bearing tires usually use a multi-layer belt structure. These belt layers are woven from steel cords and share the force of the tire with the carcass ply during driving. Traditional all-steel radial load-bearing tires paste the multi-layer belt structure on the carcass ply. The belt layers are arranged at a specific angle rather than radially between the carcass and the tread to improve the lateral stiffness and handling performance of the tire. However, a series of cutting points will be generated at the cutting of the ply. Since the belt layers are not continuous with the cords inside the carcass, the cords are subjected to uneven tension during the driving process of the tire, which can easily cause the tire to fail or even be damaged under strong impact and high load conditions.

[0003] The carcass ply of a traditional tire is made of cord and rubber through calendering, cutting and splicing. A series of cutting points will be generated at the cutting point of the cord layer, resulting in interface bonding defects in the carcass cutting point area. During the use of the tire, there is a violent shearing behavior between the cord cutting point area and the rubber, resulting in holes and cracks in this area in the early use, greatly reducing the service life of the tire. Due to the discontinuity of the cord in this area, the load-bearing capacity of the tire is seriously restricted.

[0004] Therefore, how to provide a tire structure with continuous tension of carcass cords and belt cords and a manufacturing method thereof has become a technical problem that technical personnel in the field urgently need to solve. Summary of the invention

[0005] In view of the above problems in the prior art, the present invention provides a tire structure with continuous tension of carcass cords and belt cords and a manufacturing method thereof, and specifically discloses the following technical solutions:

[0006] A tire structure with continuous tension of carcass cords and belt cords, comprising a multi-layer carcass cord tension continuity structure and a multi-layer belt cord tension continuity structure, wherein the multi-layer carcass cord tension continuity structure is coated with a wire bead, an apex rubber layer and a wire bead wrapping layer, and the multi-layer belt cord tension continuity structure is attached to the outer side of the multi-layer carcass cord tension continuity structure;

[0007] The multi-layer carcass cord tension continuity structure is composed of n carcass cord units with continuous cord tension that are continuously woven and wound, the first carcass cord unit with continuous cord tension is located at the most central position of the multi-layer carcass cord tension continuity structure, and the second carcass cord unit with continuous cord tension is woven and wound on the first carcass cord unit with continuous cord tension attached with an adhesive layer to form two layers above and below; and so on, each carcass cord unit with continuous cord tension is woven and wound in sequence to finally form a multi-layer carcass cord tension continuity structure with 2n-1 carcass cord layers along the radial direction of the tire; the carcass cord units with continuous cord tension are all endless carcass cord tubes formed by continuous zigzag weaving of cords or rubber-coated cords;

[0008] The multi-layer belt cord tension continuity structure is composed of k layers of belt cord fabric layers with continuous cord tension. The first layer of belt cord fabric layer with continuous cord tension is laminated to the outer side of the multi-layer carcass cord tension continuity structure with an adhesive layer attached, and the remaining layers of belt cord fabric layers with continuous cord tension are sequentially laminated to the outer side of the first layer of belt cord fabric layer with continuous cord tension to form a multi-layer belt cord tension continuity structure.

[0009] Furthermore, it also includes a shoulder rubber pad layer, a side rubber layer and a tread protection layer, the shoulder rubber pad layer, the side rubber layer and the tread protection layer are all bonded to the multi-layer carcass cord tension continuity structure, the inner side of the multi-layer carcass cord tension continuity structure is provided with an airtight layer, an adhesive rubber layer is attached between each cord layer in the multi-layer carcass cord tension continuity structure, and the outer side of the multi-layer belt cord tension continuity structure is sequentially attached with a tread lower layer, a cap layer and a tread upper layer.

[0010] A method for manufacturing a tire structure with continuous tension of carcass cords and belt cords, characterized by comprising the following steps:

[0011] S1. Weaving of the first carcass cord fabric unit with continuous cord tension: prepare two steel wire rings and fix them in parallel at a certain interval, wrap the apex rubber layer on the steel wire ring along the circumferential direction, select a rubber-coated cord or a cord tape composed of several rubber-coated cords, reserve a length to fix it on one of the apex rubber layers, and then wind it on the other lower apex rubber layer with a certain tension and angle, so that it is continuously wound 360 degrees in a zigzag shape along the circumferential direction, and at the same time, use an extrusion roller to calender the rubber-coated cord or cord tape into a layer, and finally connect the rubber-coated cord or cord tape at the calculated connection point to make the first carcass cord fabric unit with continuous cord tension;

[0012] S2. Weaving of the second to nth carcass cord fabric units with continuous cord tension: the upper and lower surfaces of the first carcass cord fabric unit with continuous cord tension are covered with rubber layers, a rubber-coated cord or a cord tape composed of several rubber-coated cords is selected, a certain length is reserved, one end is fixed on the first carcass cord fabric unit with continuous cord tension, and it is woven on the first carcass cord fabric unit with continuous cord tension at a certain tension and angle, and calendered with an extrusion roller, and finally the rubber-coated cord or cord tape is connected at the calculated connection point, so that the second carcass cord fabric unit with continuous cord tension is made, and the second carcass cord fabric unit with continuous cord tension is divided into upper and lower layers along the radial direction of the tire, and so on, until the weaving of n carcass cord fabric units with continuous cord tension is completed, and finally a multi-layer carcass cord tension continuity structure is formed;

[0013] S3, material preparation: preparing other structural layers required for tire production, cutting corresponding lengths of airtight layer, shoulder rubber layer, sidewall rubber layer, wire bead cover layer and bead rubber layer, and attaching them to the multi-layer carcass cord tension continuity structure 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 cord tension continuity structure;

[0014] S4, molding: filling the semi-finished parts made in step S2 with air at a certain pressure to mold the semi-finished parts of the tire;

[0015] S5. Weaving of a multi-layer belt cord tension continuity structure: select a rubber-coated cord or a cord belt composed of several rubber-coated cords, and circumferentially wind and weave along the outer side of the multi-layer carcass cord tension continuity structure at a certain tension and angle from a set belt layer width position until the weaving width reaches the set belt layer width to form a first layer of belt cord tension continuity belt ply, and by analogy, the remaining layers of belt cord tension continuity belt ply are sequentially bonded to form a multi-layer belt cord tension continuity structure;

[0016] S6, laminating the tread rubber layer on the multi-layer belt cord tension continuity structure to obtain an unvulcanized green tire of a rubber tire having a cord tension continuity structure;

[0017] S7. Vulcanization: The prepared green tire is heated and pressurized for vulcanization using a vulcanizer, and after the vulcanization is completed, a rubber tire with a cord tension continuity structure is obtained.

[0018] Furthermore, the winding angle of a single rubber-coated cord or cord tape in the multi-layer carcass cord tension continuity structure is 0.1° to 3° or -0.1° to -3° with the axial direction of the tire, and the winding angle of a single rubber-coated cord or cord tape in the multi-layer belt cord tension continuity structure is 0.1° to 30° or -0.1° to -30° with the tread center plane of the tire.

[0019] Furthermore, the winding angles of the 2nd to nth carcass cord units with continuous cord tension should maintain a symmetrical relationship, including the angle of the upper rubber covering cord or cord tape of each layer of carcass being opposite to the angle of the lower rubber covering cord or cord tape; or the angle of the upper rubber covering cord or cord tape of each layer of carcass being opposite to the angle of its adjacent upper rubber covering cord or cord tape, and the angle of the lower rubber covering cord or cord tape of each layer of carcass being opposite to the angle of its adjacent lower rubber covering cord or cord tape.

[0020] Furthermore, after the rubber-coated cords or cord tapes in the multi-layer carcass cord tension continuity structure are continuously wound in a zigzag shape, their end points return to the starting position, and the starting point and the end point are connected by butt joint and / or overlap.

[0021] Furthermore, the apex rubber layer is arranged along the circumference of the wire ring, and the material of the wire ring covering layer is a rubber strip or a woven cord layer.

[0022] Furthermore, the number of belt plies with continuous cord tension in the multi-layer belt cord tension continuity structure is an even number, and the winding angles of the inner cords of two adjacent belt plies with continuous cord tension are arranged symmetrically.

[0023] Furthermore, the thickness of the continuously woven rubber-coated cords in the multi-layer carcass cord tension continuity structure and the multi-layer belt cord tension continuity structure is 0.5 to 2 times the cord diameter, and the cords of the multi-layer carcass cord tension continuity structure and the multi-layer belt cord tension continuity structure include steel wire, nylon, aramid and a mixed material of nylon and aramid.

[0024] Furthermore, the multi-layer carcass cord tension continuity structure and the multi-layer belt cord tension continuity structure are bonded directly or through an adhesive layer. When bonding with an adhesive layer, the thickness of the adhesive layer is greater than the diameter of the carcass cord.

[0025] Furthermore, the carcass cord unit with continuous cord tension and the belt cord layer with continuous cord tension both adopt a cord tube formed by continuously and evenly winding a single rubber-coated cord or a cord belt composed of multiple rubber-coated cords; the cords in the cord belt composed of multiple rubber-coated cords are evenly distributed, and the number of cords is 2-8.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention provides a multi-layer carcass cord tension continuity structure and a multi-layer belt cord tension continuity structure to ensure continuous transmission of tension in the direction of the skeleton material when the tire is inflated and loaded, thereby improving the overall stiffness of the tire, reducing the size of each tire component, and thus significantly reducing the weight of the tire. It can also solve the industry technical problems of stiffness discontinuity and interface adhesion defects at the breakpoints of the carcass cord layer structure and the belt cord layer structure in existing tires.

[0028] The present invention can effectively solve the breakpoint problem of the carcass cord layer and the belt layer cord layer of the traditional tire, so that the carcass and belt layer cords can continuously transmit tension and control the radial and circumferential deformation of the tire; the continuous transmission of the tire skeleton tension can effectively improve the rigidity of each tire component, thereby greatly improving the tire's load-bearing capacity, impact resistance, high-speed performance and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional schematic diagram of a tire structure with continuous tension of carcass cords and belt cords according to the present invention;

[0030] Figure 2 The figure is a schematic diagram of winding a first carcass cord unit with continuous cord tension in a tire structure with continuous carcass cord and belt cord tension in the present invention;

[0031] Figure 3 A schematic diagram of the cord arrangement angle of the first carcass cord unit with continuous cord tension in a tire structure with continuous carcass cord and belt cord tension in the present invention;

[0032] Figure 4 It is a schematic diagram of winding the second to nth carcass cord fabric units with continuous cord tension in a tire structure with continuous carcass cord and belt cord tension in the present invention;

[0033] Figure 5 A schematic diagram of the cord arrangement angles of the second to nth carcass cord units with continuous cord tensions in a tire structure with continuous carcass cord and belt cord tensions in the present invention;

[0034] Figure 6 It is a schematic structural diagram of a first carcass cord unit with continuous cord tension in a tire structure with continuous carcass cord and belt cord tension in the present invention;

[0035] Figure 7 It is a schematic structural diagram of 2 to n carcass cord units with continuous cord tensions in a tire structure having a carcass cord and a belt cord with continuous tensions in the present invention;

[0036] Figure 8The schematic diagram of the structure of the first and 2 to n carcass cord units with continuous cord tension in a tire structure with continuous carcass cord and belt cord tension in the present invention; (the green line is the cord of the first carcass cord unit with continuous cord tension; the red line is the cord of the 2nd to nth carcass cord units with continuous cord tension;)

[0037] Fig. 9 A schematic diagram of winding a belt cord layer with continuous cord tension in a tire structure with continuous tension of carcass cords and belt cords in the present invention;

[0038] Fig.10 It is a schematic structural diagram of a belt cord layer with continuous cord tension in a tire structure with continuous tension of carcass cords and belt cords in the present invention;

[0039] Fig.11 It is a schematic diagram of the arrangement of the apex rubber layer on the wire ring of a tire structure with continuous tension of carcass cords and belt cords in the present invention;

[0040] Fig.12 It is a schematic diagram of a cord belt composed of a single cord coated with rubber and a plurality of cords coated with rubber in the cord layer structure of the present invention;

[0041] Fig.13 It is a diagram showing the change in the outer profile of a tire having a conventional multi-layer carcass and belt ply structure;

[0042] Fig.14 A diagram showing the change in the outer contour of a tire structure having continuous tension of carcass cords and belt cords in the present invention;

[0043] Fig.15 The figure is a schematic diagram of parameters of various parts of a tire structure with continuous tension of carcass cords and belt cords in the present invention.

[0044] 1-wire ring, 2-triangular rubber layer, 3-airtight layer, 4-multi-layer carcass cord tension continuity structure, 5-shoulder rubber layer, 6-multi-layer belt cord tension continuity structure, 7-tread upper layer, 8-cap layer, 9-tread lower layer, 10-sidewall rubber layer, 11-bead protection layer, 12-wire ring cloth layer. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0046] The present invention proposes a tire structure with continuous tension of carcass cords and belt cords to improve the impact resistance and load-bearing capacity of the tire. The tire cord tension continuity structural design aims to reduce the possibility of forming holes and cracks near these cutting points by eliminating the continuous cutting points of the cord layer in the traditional tire manufacturing process. In addition, the present invention also provides a stable and continuous force transmission structure to enhance the force transmission efficiency between the carcass and the wire ring.

[0047] To achieve the above purpose, refer to Figure 1 The present invention proposes a tire structure with continuous tension of carcass cords and belt cords, comprising a multi-layer carcass cord tension continuity structure 4, a multi-layer belt cord tension continuity structure 6, a shoulder rubber layer 5, a sidewall rubber layer 10 and a rubber layer 11, an airtight layer 3 is arranged on the inner side of the multi-layer carcass cord tension continuity structure 4, an adhesive rubber layer is attached between each cord layer in the multi-layer carcass cord tension continuity structure 4, a multi-layer belt cord tension continuity structure 6 is arranged on the outer side of the multi-layer carcass cord tension continuity structure 4, the shoulder rubber layer 5, the sidewall rubber layer 10 and the rubber layer 11 are all bonded to the multi-layer carcass cord tension continuity structure 4, the multi-layer carcass cord tension continuity structure 4 is internally coated with a wire ring 1, a apex rubber layer 2 and a wire ring wrapping layer 12, and a tread lower layer 9, a cap layer 8 and a tread upper layer 7 are sequentially attached to the outer side of the multi-layer belt cord tension continuity structure 6.

[0048] Further optimize the technical solution, the multi-layer carcass cord tension continuity structure 4 is composed of n carcass cord units with continuous cord tension that are continuously woven and wound, the first carcass cord unit with continuous cord tension is located at the most central position of the multi-layer carcass cord tension continuity structure 4, and the second carcass cord unit with continuous cord tension is woven and wound on the first carcass cord unit with continuous cord tension attached with an adhesive layer to form two layers above and below; and so on, each carcass cord unit with continuous cord tension is woven and wound in turn to finally form a multi-layer carcass cord tension continuity structure 4 with 2n-1 carcass cord layers along the radial direction of the tire; the carcass cord units with continuous cord tension are all endless carcass cord tubes formed by continuous zigzag weaving of cords or rubber-coated cords;

[0049] The multi-layer belt cord tension continuity structure 6 is composed of k layers of belt cord tension continuous plies. The first layer of belt cord tension continuous ply is laminated to the outer side of the multi-layer carcass cord tension continuity structure 4 with an adhesive layer, and the remaining layers of belt cord tension continuous plies are sequentially laminated to the outer side of the first layer of belt cord tension continuous ply to form a multi-layer belt cord tension continuity structure 6.

[0050] The present invention also proposes a method for manufacturing a tire structure with continuous tension of carcass cords and belt cords, comprising the following steps:

[0051] S1. Weaving of the first carcass cord fabric unit with continuous cord tension: prepare two steel wire rings and fix them in parallel at a certain interval, wrap the apex rubber layer on the steel wire ring along the circumferential direction, select a rubber-coated cord or a cord tape composed of several rubber-coated cords, reserve a length to fix it on one of the apex rubber layers, and then wind it on the other lower apex rubber layer with a certain tension and angle, so that it is continuously wound 360 degrees in a zigzag shape along the circumferential direction, and at the same time, use an extrusion roller to calender the rubber-coated cord or cord tape into a layer, and finally connect the rubber-coated cord or cord tape at the calculated connection point to make the first carcass cord fabric unit with continuous cord tension;

[0052] S2. Weaving of the second to nth carcass cord fabric units with continuous cord tension: the upper and lower surfaces of the first carcass cord fabric unit with continuous cord tension are covered with rubber layers, a rubber-coated cord or a cord tape composed of several rubber-coated cords is selected, a certain length is reserved, one end is fixed on the first carcass cord fabric unit with continuous cord tension, and it is woven on the first carcass cord fabric unit with continuous cord tension at a certain tension and angle, and calendered with an extrusion roller, and finally the rubber-coated cord or cord tape is connected at the calculated connection point, so that the second carcass cord fabric unit with continuous cord tension is made, and the second carcass cord fabric unit with continuous cord tension is divided into upper and lower layers along the radial direction of the tire, and so on, until the weaving of n carcass cord fabric units with continuous cord tension is completed, and finally a multi-layer carcass cord tension continuity structure is formed;

[0053] S3, material preparation: preparing other structural layers required for tire production, cutting corresponding lengths of airtight layer, shoulder rubber layer, sidewall rubber layer, wire bead cover layer and bead rubber layer, and attaching them to the multi-layer carcass cord tension continuity structure 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 cord tension continuity structure;

[0054] S4, molding: filling the semi-finished parts made in step S2 with air at a certain pressure to mold the semi-finished parts of the tire;

[0055] S5. Weaving of a multi-layer belt cord tension continuity structure: select a rubber-coated cord or a cord belt composed of several rubber-coated cords, and circumferentially wind and weave along the outer side of the multi-layer carcass cord tension continuity structure at a certain tension and angle from a set belt layer width position until the weaving width reaches the set belt layer width to form a first layer of belt cord tension continuity belt ply, and by analogy, the remaining layers of belt cord tension continuity belt ply are sequentially bonded to form a multi-layer belt cord tension continuity structure;

[0056] S6, laminating the tread rubber layer on the multi-layer belt cord tension continuity structure to obtain an unvulcanized green tire of a rubber tire having a cord tension continuity structure;

[0057] S7. Vulcanization: The prepared green tire is heated and pressurized for vulcanization using a vulcanizer, and after the vulcanization is completed, a rubber tire with a cord tension continuity structure is obtained.

[0058] To further optimize the technical solution, the winding angle of a single rubber-coated cord or cord belt in the multi-layer carcass cord tension continuity structure 4 is 0.1° to 3° or -0.1° to -3° with the axial direction of the tire, and the winding angle of a single rubber-coated cord or cord belt in the multi-layer belt cord tension continuity structure 6 is 0.1° to 30° or -0.1° to -30° with the center plane of the tire tread.

[0059] To further optimize the technical solution, the winding angles of the 2nd to nth carcass cord units with continuous cord tension should maintain a symmetrical relationship, including the angles of the upper rubber-covered cords or cord tapes of each carcass layer are opposite to the angles of the lower rubber-covered cords or cord tapes; or the angles of the upper rubber-covered cords or cord tapes of each carcass layer are opposite to the angles of its adjacent upper rubber-covered cords or cord tapes, and the angles of the lower rubber-covered cords or cord tapes of each carcass layer are opposite to the angles of its adjacent lower rubber-covered cords or cord tapes.

[0060] To further optimize the technical solution, after the rubber-coated cords or cord tapes in the multi-layer carcass cord tension continuity structure 4 are continuously wound in a zigzag shape, their end points will return to the starting position, and the starting point and the end point are connected by butt joint and / or overlap.

[0061] To further optimize the technical solution, the starting position of the continuous weaving of the rubber-coated cords or cord tapes in the multi-layer carcass cord tension continuity structure 4 is determined by finite element analysis or a tension calculation formula, the finite element method is used to calculate the stress distribution of the tire with the multi-layer carcass cord tension continuity structure under inflation and load conditions, and the position with the smallest carcass cord tension is selected as the starting position for the continuous weaving of the carcass cord layer structure with continuous cord tension.

[0062] To further optimize the technical solution, the apex rubber layer 2 is arranged circumferentially along the wire ring 1, and the material of the wire ring wrapping layer 12 is a rubber strip or a woven cord layer.

[0063] To further optimize the technical solution, the number of belt plies with continuous cord tension in the multi-layer belt cord tension continuity structure 6 is an even number, and the winding angles of the inner cords of two adjacent belt plies with continuous cord tension are symmetrically arranged.

[0064] 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 2-8.

[0065] To further optimize the technical solution, the thickness of the continuously woven rubber-coated cords in the multi-layer carcass cord tension continuity structure and the multi-layer belt cord tension continuity structure is 0.5 to 2 times the cord diameter, and the cords of the multi-layer carcass cord tension continuity structure 4 and the multi-layer belt cord tension continuity structure 6 include steel wire, nylon, aramid and a mixed material of nylon and aramid.

[0066] To further optimize the technical solution, the multi-layer carcass cord tension continuity structure and the multi-layer belt cord tension continuity structure are bonded directly or through an adhesive layer. When bonding with an adhesive layer, the thickness of the adhesive layer is greater than the diameter of the carcass cord.

[0067] The present invention provides a multi-layer carcass cord tension continuity structure and a multi-layer belt cord tension continuity structure to ensure continuous transmission of tension in the direction of the skeleton material when the tire is inflated and loaded, thereby improving the overall stiffness of the tire, reducing the size of each tire component, and thus significantly reducing the weight of the tire. It can also solve the industry technical problems of stiffness discontinuity and interface adhesion defects at the breakpoints of the carcass cord layer structure and the belt cord layer structure in existing tires.

[0068] The present invention can effectively solve the breakpoint problem of the carcass cord layer and the belt layer cord layer of the traditional tire, so that the carcass and belt layer cords can continuously transmit tension and control the radial and circumferential deformation of the tire; the continuous transmission of the tire skeleton tension can effectively improve the rigidity of each tire component, thereby greatly improving the tire's load-bearing capacity, impact resistance, high-speed performance and service life.

[0069] Example 1

[0070] Finite element analysis was performed on a tire with a multi-layer zigzag carcass ply structure and a tire structure with continuous carcass cord and belt cord tension. The specific steps are as follows:

[0071] 1. Select the tire model to be analyzed, obtain the relevant geometric parameters and material parameters of the tire model, including the maximum tire width, maximum outer diameter, radius of curvature, rubber elastic modulus, rubber Poisson's ratio, etc., and import them into the finite element calculation software;

[0072] 2. According to the above parameters, establish the tire finite element analysis model and complete the pre-processing of finite element calculation and analysis, including unit establishment, material property assignment, mesh division, etc.;

[0073] 3. Import the pre-processed finite element model into the finite element software calculation module for calculation to obtain the finite element analysis results of the tire;

[0074] The external load conditions of the finite element analysis are: the tire inflation pressure is 1.59 MPa, and the load on the tire contact area is 1.8570×105N.

[0075] The outer profile of the tire with a traditional multi-layer carcass and belt layer ply structure is obtained as follows Fig.12 As shown, and the outer profile of the tire structure with continuous tension of carcass cords and belt cords changes as shown Fig.13 As shown in the figure, the section width and sinkage of two tires with different structures under the same boundary conditions are compared and analyzed, as shown in Table 1 below. It can be found that the sinkage of the tire structure with continuous tension of carcass cords and belt cords is reduced by 8.87% compared with the tire with traditional multi-layer carcass and belt structure, and the maximum width after loading is reduced by 1.8%.

[0076]

[0077] Table 1

[0078] Example 2

[0079] A method for manufacturing a tire structure with continuous tension of carcass cords and belt cords, comprising the following steps:

[0080] S1. Weaving of the first carcass cord fabric unit with continuous cord tension: prepare two steel wire rings and fix them in parallel at a certain interval, wrap the apex rubber layer on the steel wire ring along the circumferential direction, select a rubber-coated cord or a cord tape composed of several rubber-coated cords, reserve a length to fix it on one of the apex rubber layers, and then wind it on the other lower apex rubber layer with a certain tension and angle, so that it is continuously wound 360 degrees in a zigzag shape along the circumferential direction, and at the same time, use an extrusion roller to calender the rubber-coated cord or cord tape into a layer, and finally connect the rubber-coated cord or cord tape at the calculated connection point to make the first carcass cord fabric unit with continuous cord tension;

[0081] S2. Weaving of the second to nth carcass cord fabric units with continuous cord tension: the upper and lower surfaces of the first carcass cord fabric unit with continuous cord tension are covered with rubber layers, a rubber-coated cord or a cord tape composed of several rubber-coated cords is selected, a certain length is reserved, one end is fixed on the first carcass cord fabric unit with continuous cord tension, and it is woven on the first carcass cord fabric unit with continuous cord tension at a certain tension and angle, and calendered with an extrusion roller, and finally the rubber-coated cord or cord tape is connected at the calculated connection point, so that the second carcass cord fabric unit with continuous cord tension is made, and the second carcass cord fabric unit with continuous cord tension is divided into upper and lower layers along the radial direction of the tire, and so on, until the weaving of n carcass cord fabric units with continuous cord tension is completed, and finally a multi-layer carcass cord tension continuity structure is formed;

[0082] S3, material preparation: preparing other structural layers required for tire production, cutting corresponding lengths of airtight layer, shoulder rubber layer, sidewall rubber layer, wire bead cover layer and bead rubber layer, and attaching them to the multi-layer carcass cord tension continuity structure 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 cord tension continuity structure;

[0083] S3, molding: filling the semi-finished parts made in step S2 with air at a certain pressure to mold the semi-finished parts of the tire;

[0084] S4. Weaving of a multi-layer belt cord tension continuity structure: select a rubber-coated cord or a cord belt composed of several rubber-coated cords, and circumferentially wind and weave along the outer side of the multi-layer carcass cord tension continuity structure at a certain tension and angle from a set belt layer width position until the weaving width reaches the set belt layer width to form a first layer of belt cord tension continuity belt ply, and by analogy, the remaining layers of belt cord tension continuity belt ply are sequentially bonded to form a multi-layer belt cord tension continuity structure;

[0085] S5, laminating the tread rubber layer on the multi-layer belt cord tension continuity structure to obtain an unvulcanized green tire of a rubber tire having a cord tension continuity structure;

[0086] S6. Vulcanization: The prepared green tire is heated and pressurized for vulcanization using a vulcanizer, and after the vulcanization is completed, a rubber tire with a cord tension continuity structure is obtained.

[0087] To further optimize the technical solution, the winding angle of a single rubber-coated cord or cord tape in the multi-layer carcass cord tension continuity structure 4 is 0.1° to 3° or -0.1° to -3° with the axial direction of the tire, and the winding angle of a single rubber-coated cord or cord tape in the multi-layer belt cord tension continuity structure 6 is 0.1° to 30° or -0.1° to -30° with the center plane of the tire tread.

[0088] The width of the cord tape formed by the rubber coating of a single cord is b, the thickness is h, and the radius of the wire ring covered with the triangle rubber layer is R. rim The cross section of the wire ring is approximately a circular cross section, and its diameter is denoted as d. The number of turns of the cord tape in the first carcass cord fabric with continuous cord tension is N1, which can be calculated according to formula (1). The number of turns of the cord tape in the carcass cord fabric with continuous cord tension from the 2nd to the nth is N. 2～n , which can be calculated according to formula (2); preferably, the width of a single rubber-coated cord is between 2 and 4 mm, and the cord belt composed of multiple rubber-coated cords can be composed of 2 to 8 cords.

[0089] according to Figure 2As shown in the figure, the first carcass cord unit with continuous cord tension has a spacing of b between each two cord tapes; each winding is composed of two cord tapes, and a total of 2N1 cord tapes are arranged in the entire single-layer carcass cord layer with continuous cord tension, as shown in formula (1):

[0090]

[0091] according to Figure 4 As shown in the figure, the tire cord units with continuous cord tension from 2 to n have a rubber coating thickness of H between each tire cord. Each time a circle is wound, the upper and lower layers of the tire cord tube are each arranged with a cord tape, and the spacing between each two cord tapes is 0. In the tire cord tension continuous tire cord unit, a total of N cord tapes are arranged in a zigzag shape. n The segment cord belt is as shown in formula (2):

[0092]

[0093] according to Figure 5 , 10 As shown, the 1st to kth layers of belt cord plies with continuous cord tension, the width of each layer of belt cord plies with continuous cord tension is W K The rubber thickness between the belt cord layers with continuous cord tension is H, and the spacing between each two cord belts is c k ; A total of K are arranged in the belt cord layer with continuous cord tension k The segment cord belt is as shown in formula (3):

[0094]

[0095] When the tire is formed, the tire body cord tube with continuous cord tension in each layer will deform, and the radius of each part will change, such as Fig.10 The schematic diagram of the tire is shown in FIG. rim R is the contact radius of the rim, d is the radius of the tire at its maximum width, W is the maximum radius of the first carcass cord unit with continuous cord tension after the tire is formed. K is the width of each belt cord layer; the density of the cord arrangement in the first carcass cord unit with continuous cord tension is expressed by ρ1 (unit: segment / mm), and the density of the cord arrangement in each part of the carcass cord unit with continuous cord tension after forming is (Unit: segment / mm) is shown in formulas (4) to (6).

[0096]

[0097]

[0098]

[0099] Similarly, the density of cord arrangement in each part of the carcass cord unit with continuous cord tension from the 2nd to the nth cord after forming (Unit: segment / mm) is shown in formulas (7) to (9).

[0100]

[0101]

[0102]

[0103] The density of cord arrangement in the belt cord layer with continuous cord tension from the 1st to the kth layer (Unit: segment / mm) is shown in formula (10):

[0104]

[0105] 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 still fall within the scope of the technical solution of the present invention.

Claims

1. A tire structure with continuous tension of carcass cords and belt cords, characterized in that: It comprises a multi-layer carcass cord tension continuity structure and a multi-layer belt cord tension continuity structure, wherein the multi-layer carcass cord tension continuity structure is coated with a wire ring, an apex rubber layer and a wire ring wrapping layer, and the multi-layer belt cord tension continuity structure is attached to the outer side of the multi-layer carcass cord tension continuity structure; The multi-layer carcass cord tension continuity structure is composed of n carcass cord units with continuous cord tension that are continuously woven and wound, the first carcass cord unit with continuous cord tension is located at the most central position of the multi-layer carcass cord tension continuity structure, and the second carcass cord unit with continuous cord tension is woven and wound on the first carcass cord unit with continuous cord tension attached with an adhesive layer to form two layers above and below; and so on, each carcass cord unit with continuous cord tension is woven and wound in sequence to finally form a multi-layer carcass cord tension continuity structure with 2n-1 carcass cord layers along the radial direction of the tire; the carcass cord units with continuous cord tension are all endless carcass cord tubes formed by continuous zigzag weaving of cords or rubber-coated cords; The multi-layer belt cord tension continuity structure is composed of k layers of belt cord fabric layers with continuous cord tension. The first layer of belt cord fabric layer with continuous cord tension is laminated to the outer side of the multi-layer carcass cord tension continuity structure with an adhesive layer attached, and the remaining layers of belt cord fabric layers with continuous cord tension are sequentially laminated to the outer side of the first layer of belt cord fabric layer with continuous cord tension to form a multi-layer belt cord tension continuity structure.

2. A tire structure with continuous tension of carcass cords and belt cords according to claim 1, characterized in that: It also includes a shoulder rubber pad layer, a sidewall rubber layer and a tread protection layer. The shoulder rubber pad layer, the sidewall rubber layer and the tread protection layer are all bonded to the multi-layer carcass cord tension continuity structure. An airtight layer is provided on the inner side of the multi-layer carcass cord tension continuity structure. An adhesive rubber layer is attached between each cord layer in the multi-layer carcass cord tension continuity structure. The outer side of the multi-layer belt cord tension continuity structure is sequentially attached with a tread lower layer, a cap layer and a tread upper layer.

3. A method for manufacturing a tire structure having continuous tension of carcass cords and belt cords according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1. Weaving of the first carcass cord fabric unit with continuous cord tension: prepare two steel wire rings and fix them in parallel at a certain interval, wrap the apex rubber layer on the steel wire ring along the circumferential direction, select a rubber-coated cord or a cord tape composed of several rubber-coated cords, reserve a length to fix it on one of the apex rubber layers, and then wind it on the other lower apex rubber layer with a certain tension and angle, so that it is continuously wound 360 degrees in a zigzag shape along the circumferential direction, and at the same time, use an extrusion roller to calender the rubber-coated cord or cord tape into a layer, and finally connect the rubber-coated cord or cord tape at the calculated connection point to make the first carcass cord fabric unit with continuous cord tension; S2. Weaving of the second to nth carcass cord fabric units with continuous cord tension: the upper and lower surfaces of the first carcass cord fabric unit with continuous cord tension are covered with rubber layers, a rubber-coated cord or a cord tape composed of several rubber-coated cords is selected, a certain length is reserved, one end is fixed on the first carcass cord fabric unit with continuous cord tension, and it is woven on the first carcass cord fabric unit with continuous cord tension at a certain tension and angle, and calendered with an extrusion roller, and finally the rubber-coated cord or cord tape is connected at the calculated connection point, so that the second carcass cord fabric unit with continuous cord tension is made, and the second carcass cord fabric unit with continuous cord tension is divided into upper and lower layers along the radial direction of the tire, and so on, until the weaving of n carcass cord fabric units with continuous cord tension is completed, and finally a multi-layer carcass cord tension continuity structure is formed; S3, material preparation: preparing other structural layers required for tire production, cutting corresponding lengths of airtight layer, shoulder rubber layer, sidewall rubber layer, wire bead cover layer and bead rubber layer, and attaching them to the multi-layer carcass cord tension continuity structure 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 cord tension continuity structure; S4, molding: filling the semi-finished parts made in step S2 with air at a certain pressure to mold the semi-finished parts of the tire; S5. Weaving of a multi-layer belt cord tension continuity structure: select a rubber-coated cord or a cord belt composed of several rubber-coated cords, and circumferentially wind and weave along the outer side of the multi-layer carcass cord tension continuity structure at a certain tension and angle from a set belt layer width position until the weaving width reaches the set belt layer width to form a first layer of belt cord tension continuity belt ply, and by analogy, the remaining layers of belt cord tension continuity belt ply are sequentially bonded to form a multi-layer belt cord tension continuity structure; S6, laminating the tread rubber layer on the multi-layer belt cord tension continuity structure to obtain an unvulcanized green tire of a rubber tire having a cord tension continuity structure; S7. Vulcanization: The prepared green tire is heated and pressurized for vulcanization using a vulcanizer, and after the vulcanization is completed, a rubber tire with a cord tension continuity structure is obtained.

4. The method for manufacturing a tire structure with continuous tension of carcass cords and belt cords according to claim 3, characterized in that: The winding angle of a single rubber-coated cord or cord tape in the multi-layer carcass cord tension continuity structure is 0.1° to 3° or -0.1° to -3° with the axial direction of the tire, and the winding angle of a single rubber-coated cord or cord tape in the multi-layer belt cord tension continuity structure is 0.1° to 30° or -0.1° to -30° with the tread center plane of the tire.

5. The method for manufacturing a tire structure with continuous tension of carcass cords and belt cords according to claim 3, characterized in that: The winding angles of the 2nd to nth carcass cord units with continuous cord tension should maintain a symmetrical relationship, including the angle of the upper rubber-covered cords or cord tapes of each layer of carcass being opposite to the angle of the lower rubber-covered cords or cord tapes; or the angle of the upper rubber-covered cords or cord tapes of each layer of carcass being opposite to the angle of the adjacent upper rubber-covered cords or cord tapes, and the angle of the lower rubber-covered cords or cord tapes of each layer of carcass being opposite to the angle of the adjacent lower rubber-covered cords or cord tapes.

6. The method for manufacturing a tire structure with continuous tension of carcass cords and belt cords according to claim 3, characterized in that: After the rubber-coated cords or cord tapes in the multi-layer carcass cord tension continuity structure are continuously wound in a zigzag shape, their end points return to the starting position, and the starting point and the end point are connected by butt joint and / or overlap.

7. The method for manufacturing a tire structure with continuous tension of carcass cords and belt cords according to claim 3, characterized in that: The apex rubber layer is arranged along the circumference of the wire ring, and the material of the wire ring cloth layer is a rubber strip or a woven cord layer.

8. The method for manufacturing a tire structure with continuous tension of carcass cords and belt cords according to claim 3, characterized in that: The number of belt plies with continuous cord tension in the multi-layer belt cord tension continuity structure is an even number, and the winding angles of the inner cords of two adjacent belt plies with continuous cord tension are symmetrically arranged.

9. The method for manufacturing a tire structure with continuous tension of carcass cords and belt cords according to claim 3, characterized in that: The thickness of the continuously woven rubber-coated cords in the multi-layer carcass cord tension continuity structure and the multi-layer belt cord tension continuity structure is 0.5 to 2 times the cord diameter. The cords of the multi-layer carcass cord tension continuity structure and the multi-layer belt cord tension continuity structure include steel wire, nylon, aramid and a mixed material of nylon and aramid.

10. The method for manufacturing a tire structure with continuous tension of carcass cords and belt cords according to claim 3, characterized in that: The multi-layer carcass cord tension continuity structure and the multi-layer belt cord tension continuity structure are bonded directly or through an adhesive layer. When bonding with an adhesive layer, the thickness of the adhesive layer is greater than the diameter of the carcass cord.

11. The method for manufacturing a tire structure with continuous tension of carcass cords and belt cords according to claim 3, characterized in that: The carcass cord unit with continuous cord tension and the belt cord layer with continuous cord tension both adopt a cord tube formed by continuously and evenly winding a single rubber-coated cord or a cord belt composed of multiple rubber-coated cords; the cords in the cord belt composed of multiple rubber-coated cords are evenly distributed, and the number of cords is 2-8.

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