Cable bead, manufacturing method and tyre
By designing a cable-type bead structure with an inner arc radius larger than the outer arc radius, the problem of insufficient outer winding arrangement on the inner side of the core bead was solved. This allows for an increase in the number of outer windings without increasing bead space or weight, thereby improving the load-bearing capacity and service life of the cable-type bead.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU XINGDA STEEL TYPE CORD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-06-26
AI Technical Summary
The existing cable-type tire bead has insufficient space for the outer winding of the core ring, resulting in compression of the outer winding, which affects the service life and load-bearing capacity. Existing improvement methods result in a decrease in overall load-bearing capacity or an increase in weight.
The design of the core bead cross-section features a larger radius of curvature on the inner side of the core bead than on the outer side, with a smooth curve transition to ensure sufficient arrangement space for the outer windings on the inner side of the core bead. This allows for an increase in the number of outer windings without significantly increasing bead space and weight.
It improves the arrangement and compression of the outer windings inside the bead, increases the number of outer windings, and enhances the load-bearing capacity of the cable bead and the tire's service life.
Smart Images
Figure CN120572865B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of tire manufacturing technology, and in particular to a cable-type bead and its manufacturing method. Furthermore, this invention also relates to a tire comprising the aforementioned cable-type bead. Background Technology
[0002] Cable-type tire bead has excellent impact resistance and, in addition to its applications in aircraft tires and racing tires, it also has broad application prospects in off-road tires.
[0003] A cable bead consists of a ring-shaped core and an outer spiral wound around it. Typically, both the core and the outer spiral have circular cross-sections, resulting in a circular bead as well. However, due to the ring shape of the core, the outer spiral wound exhibits a larger angle and tighter arrangement on the inner curved surface of the core, while on the outer curved surface, the angle is relatively smaller, resulting in larger gaps between the spirals. Aviation and racing tires have fewer winding layers, while giant off-road tires have more. When multiple layers are wound, insufficient space for the outer spirals inside the core leads to mutual compression, causing wear and reducing tire life. One improvement is to reduce the number of outer spirals, creating gaps between them inside the core, but this reduces the overall load-bearing capacity of the cable bead. Another way to improve this is to increase the diameter of the bead ring, which can increase the arrangement space inside the bead ring, but it also increases the arrangement space outside the bead ring, making the space occupied by the cable bead ring larger and the weight larger, affecting the overall tire design.
[0004] US Patent 6244318B1 discloses a cable-type tire bead where the outermost layer of winding thread has fewer strands than the theoretical number, in order to increase the winding gap. However, reducing the number of outer strands decreases the load-bearing capacity of the cable-type tire bead.
[0005] Chinese invention patent application CN107953728A discloses a cable-type tire bead that reduces the spacing and cross-sectional dimensions by using a flattened outer winding design. However, the manufacturing process of the flattened outer winding is complicated, and the flattened design reduces the strength of the outer winding, thus decreasing the load-bearing capacity of the cable-type tire bead.
[0006] Chinese invention patent application CN118306138A discloses a cable-type tire bead that uses different winding twist pitches for the outer winding yarn, changing the arrangement distance of the outer winding yarn on the core yarn, thereby creating winding gaps between the outer winding yarns at the different winding twist pitch positions. However, this design is an improvement made under the condition that the winding space is large enough, and it cannot solve the problem of insufficient space for the outer winding yarn to be arranged inside the core bead. Summary of the Invention
[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a cable-type tire bead, a method for manufacturing a cable-type tire bead, and a tire. By designing and increasing the radius of the arc surface of the core ring cross-section of the cable-type tire bead inside the core ring, sufficient arrangement space is provided for the outer winding yarn inside the core ring, improving the compression phenomenon of the arrangement of the outer winding yarn, increasing the number of outer winding yarns, and without significantly increasing the space occupied by the cable-type tire bead.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] In a first aspect, the present invention provides a cable-type tire bead, comprising an annular core ring and an outer winding thread spirally wound around the core ring, wherein the radius of the arc surface of the core ring cross-section inside the core ring is greater than the radius of the arc surface of the core ring cross-section outside the core ring, and the arc surface inside the core ring and the arc surface outside the core ring are transitioned by a smooth curve.
[0010] The core ring refers to the center surrounded by the outer winding of the cable-type bead. The core ring can be a core wire, a core body, or a prefabricated cable-type bead. The core wire is made of a single type of wire, such as steel, aluminum, or copper. The core body is made of composite materials or has a complex structure, such as stranded wires, core wires covered with other materials, or a hollow tube.
[0011] In this invention, "inner side of the core ring" refers to the side of the annular core ring facing the center of the core ring, and "outer side of the core ring" refers to the side of the annular core ring away from the center of the core ring.
[0012] Furthermore, the radius of the arc surface of the core ring cross-section inside the core ring is 1.02 to 2 times the radius of the arc surface of the core ring cross-section outside the core ring.
[0013] If the ratio of the radius of the inner arc surface of the core loop cross-section to the radius of the outer arc surface of the core loop cross-section is less than 1.02, the space for the outer winding yarn arrangement inside the core loop cannot be effectively increased. If the ratio of the radius of the inner arc surface of the core loop cross-section to the radius of the outer arc surface of the core loop cross-section is greater than 2, the transition curve between the inner and outer arc surfaces of the core loop will be uneven, resulting in a large void between the outer winding yarn and the core loop.
[0014] Furthermore, the arc length of the core ring cross-section inside the core ring accounts for 1 / 6 to 1 / 2 of the circumference of the core ring cross-section.
[0015] If the length of the inner arc surface of the bead cross-section is less than 1 / 6 of the circumference of the bead cross-section, the inner arc surface space will be insufficient, and the arrangement of the outer windings on the inner side of the bead will not be improved. If the length of the inner arc surface of the bead cross-section is greater than 1 / 2 of the circumference of the bead cross-section, the entire bead cross-section will be larger, excessively increasing the weight of the bead.
[0016] Furthermore, the arc length of the core ring cross-section on the outer side of the core ring accounts for 1 / 6 to 1 / 2 of the circumference of the core ring cross-section.
[0017] If the arc length of the core coil's cross-section on the outer side is less than 1 / 6 of the core coil's cross-section circumference, the overall core coil cross-section will be larger. If the arc length of the core coil's cross-section on the outer side is greater than 1 / 2 of the core coil's cross-section circumference, the arc length on the inner side of the core coil will be limited, preventing the improvement of the outer winding arrangement on the inner side of the core coil.
[0018] Furthermore, the outer winding and the core ring are in close contact at any cross-section.
[0019] Optionally, the core ring is made of wire with a large arc radius on one side of the cross-section and a small arc radius on the other side, with the side with the large arc radius of the cross-section located inside the core ring and the side with the small arc radius of the cross-section located outside the core ring.
[0020] Optionally, the core ring is composed of a core ring body and a gasket disposed inside the core ring body. The core ring body is an annular core ring with a circular cross-section, and the gasket is configured such that the radius of the arc surface of the core ring cross-section inside the core ring is greater than the radius of the arc surface of the core ring cross-section outside the core ring.
[0021] Optionally, the core ring is composed of a core ring body and a gasket disposed inside the core ring body. The core ring body is a cable-shaped tire bead with a circular cross-section, and the gasket is configured such that the radius of the arc surface of the core ring cross-section inside the core ring is greater than the radius of the arc surface of the core ring cross-section outside the core ring.
[0022] Furthermore, the gasket is made of metallic or non-metallic materials. Metallic materials may include steel, aluminum, copper, etc., while non-metallic materials may include rubber, plastic, fiber, etc.
[0023] Therefore, the core ring is composed of a single or mixed composition of metallic or non-metallic materials.
[0024] Specifically, when the core coil uses a core wire, the core coil can be composed of metal materials such as steel wire, aluminum wire, or copper wire.
[0025] When the core ring uses a core body, the core ring can be, for example, a steel wire ring with a layer of rubber attached to the inside, or a plastic ring with a layer of aluminum sheet on the inside, or twisted fibers, or a hollow tube, etc. There can be many combinations to form complex structures or composite materials.
[0026] When the core ring uses a prefabricated cable bead, the core ring is composed of a conventional cable bead with metal or non-metal materials added to the inside.
[0027] Furthermore, the number of outer winding layers is 5-20.
[0028] When the number of outer winding layers is less than 5, the compression of the outer winding layers inside the core ring is relatively minor. While the number of outer winding layers can be increased in structural design, excessive layers complicate the manufacturing process; therefore, the number of outer winding layers should ideally not exceed 20.
[0029] Furthermore, the diameter of the core ring is 1.00~8.00mm.
[0030] Furthermore, the diameter of the outer winding is 0.80~3.00mm.
[0031] Furthermore, the outer winding is a coated wire covered with a copper layer, zinc layer, brass layer, bronze layer, silane coupling agent or other coatings that promote adhesion to rubber, so as to improve the adhesion between the bead and the rubber.
[0032] Secondly, the present invention provides a method for manufacturing a cable-type tire bead, comprising:
[0033] Step 1: Make an annular core ring, such that the radius of the arc surface of the core ring cross-section on the inner side of the core ring is greater than the radius of the arc surface of the core ring cross-section on the outer side of the core ring, and the arc surface on the inner side of the core ring and the arc surface on the outer side of the core ring are transitioned by a smooth curve.
[0034] Step 2: Spiral the outer winding thread around the annular core ring;
[0035] Step 3: Secure the beginning and end of the outer wrapping wire with a connector;
[0036] Step 4: Repeat steps 2 to 3 to obtain a multi-layered cable-shaped bead.
[0037] Optionally, step 1 includes:
[0038] A core ring is formed by welding wires with a larger arc radius on one side of the cross-section and a smaller arc radius on the other side, with the side with the larger arc radius on the inside of the core ring and the side with the smaller arc radius on the outside of the core ring.
[0039] Optionally, step 1 includes:
[0040] A ring-shaped core with a circular cross-section is made as the core body. A gasket is placed inside the core body so that the radius of the arc surface of the core cross-section inside the core is greater than the radius of the arc surface of the core cross-section outside the core.
[0041] Optionally, step 1 includes:
[0042] A cable-type bead with a circular cross-section is used as the core bead body. A gasket is placed inside the core bead body so that the radius of the arc surface of the core bead cross-section inside the core bead is greater than the radius of the arc surface of the core bead cross-section outside the core bead.
[0043] Thirdly, the present invention provides a tire including the cable-type bead as described in any of the first aspects.
[0044] Tire specifications can cover motorcycle tires, passenger car tires, racing tires, pickup truck tires, light and heavy truck tires, aircraft tires, and agricultural and construction machinery tires.
[0045] Compared with the prior art, the present invention has the following beneficial effects:
[0046] This invention utilizes a design where the radius of the inner arc surface of the cable-type bead's core ring cross-section is larger than the radius of the inner arc surface. This design allows the outer winding yarns to have sufficient arrangement space inside the core ring, improving upon the problem of large gaps between the outer winding yarns on the outside of the core ring and compression on the inside. This increases the number of outer winding yarns without significantly increasing the space occupied by the cable-type bead, thus improving its load-bearing capacity and extending tire lifespan.
[0047] This invention also provides a method for manufacturing a cable-type tire bead, which involves welding wires with a large arc radius on one side of the cross-section and a small arc radius on the other side, or placing material inside an annular core ring with a circular cross-section, or using a cable-type tire bead with a circular cross-section as the core ring body and placing material inside the core ring body to create a core ring with an arc radius on the inner side of the core ring that is larger than the arc radius on the outer side of the core ring, and then spirally winding the outer wire to obtain a cable-type tire bead with the same effect as in this application. Attached Figure Description
[0048] Figure 1 This is a cross-sectional schematic diagram of a core ring according to the present invention;
[0049] Figure 2 This is a cross-sectional schematic diagram of a cable-type tire bead with a single layer of outer winding provided by the present invention;
[0050] Figure 3 This is a cross-sectional schematic diagram of the cable-type tire bead with two layers of outer winding provided by the present invention;
[0051] Figure 4This is a cross-sectional schematic diagram of the cable-type tire bead with three layers of outer winding provided by the present invention;
[0052] Figure 5 This is a cross-sectional schematic diagram of another core ring of the present invention;
[0053] Figure 6 This is a cross-sectional schematic diagram of another cable-type tire bead according to the present invention.
[0054] In the diagram, 1 is the core ring; 2 is the outer winding; 10 is the cable-type bead with a circular cross-section; and 11 is the gasket. Detailed Implementation
[0055] The present invention will be further described below with reference to specific embodiments. These embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.
[0056] The present invention provides a cable-type tire bead, comprising an annular core ring and an outer winding thread spirally wound around the core ring. The radius of the arc surface of the core ring cross-section inside the core ring is greater than the radius of the arc surface of the core ring cross-section outside the core ring, and the arc surface inside the core ring and the arc surface outside the core ring are transitioned by a smooth curve.
[0057] Figure 1 This is a cross-sectional schematic diagram of a core ring according to the present invention. The radius of the arc surface of the core ring 1's cross-section on the inner side of the core ring is R2, and the arc length is L2. The radius of the arc surface of the core ring 1's cross-section on the outer side of the core ring is R1, and the arc length is L1. The height of the core ring 1's cross-section is H0, and the width is W0.
[0058] In one implementation, Figure 1 The core ring 1 shown can be made of wire with a large arc radius on one side of the cross-section and a small arc radius on the other side. The side with the larger arc radius of the cross-section is located inside the core ring 1, and the side with the smaller arc radius of the cross-section is located outside the core ring 1.
[0059] In another implementation, Figure 1 The shown core ring can be composed of a core ring body and a spacer disposed inside the core ring body. The core ring body is an annular core ring with a circular cross-section. The spacer is configured such that the radius R2 of the arc surface of the core ring 1's cross-section inside the core ring is greater than the radius R1 of the arc surface of the core ring 1's cross-section outside the core ring. The spacer can be referenced from... Figure 5 Mark 11.
[0060] Figure 2 This is a cross-sectional schematic diagram of the cable-type tire bead with a single layer of outer winding provided by the present invention. The core ring 1 adopts the following... Figure 1The core ring is shown. The shaded area shows the outer winding 2, whose cross-section is slightly elliptical due to the larger angle of its curved surface arrangement inside the core ring. The blank area shows the outer winding 2, whose cross-section is approximately circular due to its relatively smaller arrangement angle. The height of the cable-type bead cross-section is H1, and the width is W1.
[0061] Figure 3 This is a cross-sectional schematic diagram of a cable-type tire bead with two layers of outer winding provided by the present invention. The height of the cable-type tire bead cross-section is H2 and the width is W2.
[0062] Figure 4 This is a schematic diagram of a cable-type tire bead with a three-layer outer winding provided by the present invention. The height of the cable-type tire bead cross-section is H3 and the width is W3.
[0063] Figure 5 This is a cross-sectional schematic diagram of another core ring of the present invention. The core ring 1 is composed of a cable-shaped bead 10 with a circular cross-section and a gasket 11. The radius of the arc surface of the cross-section of the core ring 1 on the inner side of the core ring is R4, and the radius of the arc surface of the cross-section of the core ring 1 on the outer side of the core ring is R3.
[0064] Figure 6 This is a cross-sectional schematic diagram of another cable-type tire bead provided by the present invention. The core ring 1 uses... Figure 5 The shaded area shows the outer winding 2, which has a slightly elliptical cross-section due to its larger curved surface angle inside the core ring. The blank area shows the outer winding 2, whose cross-section is approximately circular due to its relatively smaller angle. The cable-type bead cross-section has a height of H4 and a width of W4.
[0065] Example 1
[0066] The cable-type tire bead structure of this embodiment is (R4.00+R3.25)+(12)×2.20, that is, the radius of the arc surface of the core bead cross-section inside the core bead is 4.00mm, the radius of the arc surface of the core bead cross-section outside the core bead is 3.25mm, the diameter of the outer winding wire is 2.20mm, and the number of outer winding wires is 12.
[0067] A comparative test was conducted between this embodiment and the prior art cable-type tire bead, and the test results are shown in Table 1.
[0068] Table 1
[0069]
[0070] The ratio of the theoretical total breaking force to the cross-sectional area of a cable-type tire bead reflects its load-bearing capacity within a given space. A higher ratio indicates better performance of the cable-type tire bead, meaning it can reduce the space occupied and achieve a higher load-bearing capacity. As shown in Table 1, compared with Comparative Example 1 and Comparative Example 2, the ratio of the theoretical total breaking force to the cross-sectional area of the cable-type tire bead in Example 1 is higher.
[0071] Example 2
[0072] The cable-type bead structure in this embodiment is (R4.00+R3.25)+(12+18+24+30+36+42+48+54+60+66)×2.20, that is, the radius of the arc surface of the core bead cross-section on the inner side of the core bead is 4.00mm, the radius of the arc surface of the core bead cross-section on the outer side of the core bead is 3.25mm, the diameter of the outer winding is 2.20mm, the outer winding is arranged in 10 layers, and the number of layers arranged from the inside to the outside are 12 / 18 / 24 / 30 / 36 / 42 / 48 / 54 / 60 / 66, for a total of 390.
[0073] A comparative test was conducted between this embodiment and the prior art cable-type tire bead, and the test results are shown in Table 2.
[0074] Table 2
[0075]
[0076] As can be seen from Table 2, compared with Comparative Examples 3 and 4, the ratio of theoretical total breaking force to cross-sectional area of the cable-type tire bead in Example 2 is higher.
[0077] Example 3
[0078] The cable-type bead structure of this embodiment is (5.00+(10)×2.00)+NR+(16+22+28+34+40)×2.00, that is, the core ring is composed of a cable-type bead with a circular cross-section of 5.00+(10)×2.00 and a gasket NR made of natural rubber. The outer steel wire has a diameter of 2.00mm and continues to be wound for 5 layers. The number of the arrangement from the inside to the outside is 16 / 22 / 28 / 34 / 40, for a total of 140.
[0079] A comparative test was conducted between this embodiment and the prior art cable-type tire bead, and the test results are shown in Table 3.
[0080] Table 3
[0081]
[0082] As can be seen from Table 3, compared with Comparative Examples 5 and 6, the ratio of theoretical total breaking force to cross-sectional area of the cable-type bead in Example 3 is higher.
[0083] Example 4
[0084] Combination Figures 2 to 4 As shown, this embodiment provides a method for manufacturing a cable-type tire bead, including:
[0085] Step 1, make the annular core ring 1: use wire with a large arc radius on one side of the cross-section and a small arc radius on the other side to weld the core ring 1, and place the side with the larger arc radius on the inside of the core ring 1 and the side with the smaller arc radius on the outside of the core ring 1. There is a smooth curve transition between the arc surface on the inside of the core ring 1 and the arc surface on the outside of the core ring 1.
[0086] Step 2: Spiral the outer winding 2 around the annular core ring 1;
[0087] Step 3: Secure the beginning and end of the outer wrapping wire 2 using a connector;
[0088] Step 4: Repeat steps 2 to 3 to obtain a multi-layered cable-shaped bead.
[0089] Example 5
[0090] Combination Figures 2 to 4 As shown, this embodiment provides a method for manufacturing a cable-type tire bead, including:
[0091] Step 1, make annular core ring 1: make an annular core ring with a circular cross-section as the core ring body, and set a gasket on the inner side of the core ring body so that the arc radius of the cross-section of the core ring 1 on the inner side of the core ring is greater than the arc radius of the cross-section of the core ring 1 on the outer side of the core ring.
[0092] Step 2: Spiral the outer winding 2 around the annular core ring 1;
[0093] Step 3: Secure the beginning and end of the outer wrapping wire 2 using a connector;
[0094] Step 4: Repeat steps 2 to 3 to obtain a multi-layered cable-shaped bead.
[0095] Example 6
[0096] Combination Figure 5 and Figure 6 As shown, this embodiment provides a method for manufacturing a cable-type tire bead, including:
[0097] Step 1, making the annular core ring 1: use a cable-type bead 10 with a circular cross-section as the core ring body, and set a gasket 11 on the inner side of the core ring body so that the arc radius of the cross-section of the core ring 1 on the inner side of the core ring is greater than the arc radius of the cross-section of the core ring 1 on the outer side of the core ring.
[0098] Step 2: Spiral the outer winding 2 around the annular core ring 1;
[0099] Step 3: Secure the beginning and end of the outer wrapping wire 2 using a connector;
[0100] Step 4: Repeat steps 2 to 3 to obtain a multi-layered cable-shaped bead.
[0101] The cable-type tire bead of this invention can be widely used in various tires, such as motorcycle tires, passenger car tires, racing tires, pickup truck tires, light and heavy truck tires, aircraft tires, and agricultural and construction machinery tires.
[0102] The present invention has been disclosed above with reference to preferred embodiments, but it is not intended to limit the present invention. All technical solutions obtained by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the present invention.
Claims
1. A cable-type tire bead, comprising an annular core ring (1) and an outer winding (2) spirally wound around said core ring (1), characterized in that, The radius (R2,R4) of the arc surface of the core ring (1) on the inner side of the core ring is greater than the radius (R1,R3) of the arc surface of the core ring (1) on the outer side of the core ring. The arc surface on the inner side of the core ring and the arc surface on the outer side of the core ring are transitioned by a smooth curve. The radius (R2,R4) of the arc surface of the core ring (1) on the inner side of the core ring is 1.02 to 2 times the radius (R1,R3) of the arc surface of the core ring (1) on the outer side of the core ring. The inner side of the core ring refers to the side of the annular core ring facing the center of the core ring, and the outer side of the core ring refers to the side of the annular core ring away from the center of the core ring.
2. The cable-type tire bead according to claim 1, characterized in that, The arc length (L2) of the cross-section of the core ring (1) inside the core ring accounts for 1 / 6 to 1 / 2 of the circumference of the cross-section of the core ring (1).
3. The cable-type tire bead according to claim 1, characterized in that, The arc length (L1) of the cross-section of the core ring (1) on the outside of the core ring accounts for 1 / 6 to 1 / 2 of the circumference of the cross-section of the core ring (1).
4. The cable-type tire bead according to claim 1, characterized in that, The core ring (1) is made of wire with a large arc radius on one side of the cross-section and a small arc radius on the other side. The side with a large arc radius of the cross-section is located inside the core ring (1), and the side with a small arc radius of the cross-section is located outside the core ring (1).
5. The cable-type tire bead according to claim 1, characterized in that, The core ring (1) is composed of a core ring body and a gasket (11) disposed inside the core ring body. The core ring body is an annular core ring with a circular cross-section. The gasket (11) is configured such that the arc radius (R2, R4) of the cross-section of the core ring (1) inside the core ring is greater than the arc radius (R1, R3) of the cross-section of the core ring (1) outside the core ring.
6. The cable-type tire bead according to claim 1, characterized in that, The core ring consists of a core ring body and a gasket (11) disposed inside the core ring body. The core ring body is a cable-type bead (10) with a circular cross-section. The gasket (11) is configured such that the radius of the arc surface (R2, R4) of the core ring (1) cross-section inside the core ring is greater than the radius of the arc surface (R1, R3) of the core ring cross-section outside the core ring.
7. The cable-type tire bead according to claim 1, characterized in that, The outer winding (2) and the core ring (1) are in close contact at any cross-section.
8. The cable-type tire bead according to claim 1, characterized in that, The number of layers of the outer winding (2) is 5-20.
9. A method for manufacturing a cable-type tire bead, characterized in that, include: Step 1: Fabricate an annular core ring, ensuring that the radius of the arc surface of the core ring's cross-section on the inner side of the core ring is greater than the radius of the arc surface of the core ring's cross-section on the outer side of the core ring. The arc surface on the inner side of the core ring and the arc surface on the outer side of the core ring are connected by a smooth curve. Herein, the inner side of the core ring refers to the side of the annular core ring facing the center of the core ring, and the outer side of the core ring refers to the side of the annular core ring away from the center of the core ring. Step 2: Spiral the outer winding thread around the annular core ring; Step 3: Secure the beginning and end of the outer wrapping wire with a connector; Step 4: Repeat steps 2 to 3 to obtain a multi-layered cable-shaped bead. The radius (R2,R4) of the arc surface of the cross-section of the core ring (1) inside the core ring is 1.02 to 2 times the radius (R1,R3) of the arc surface of the cross-section of the core ring (1) outside the core ring.
10. The manufacturing method according to claim 9, characterized in that, Step 1 includes: A core ring is formed by welding wires with a larger arc radius on one side of the cross-section and a smaller arc radius on the other side, with the side with the larger arc radius on the inside of the core ring and the side with the smaller arc radius on the outside of the core ring.
11. The manufacturing method according to claim 9, characterized in that, Step 1 includes: A ring-shaped core with a circular cross-section is made as the core body. A gasket is placed inside the core body so that the radius of the arc surface of the core cross-section inside the core is greater than the radius of the arc surface of the core cross-section outside the core.
12. The manufacturing method according to claim 9, characterized in that, Step 1 includes: A cable-type bead with a circular cross-section is used as the core bead body. A gasket is placed inside the core bead body so that the radius of the arc surface of the core bead cross-section inside the core bead is greater than the radius of the arc surface of the core bead cross-section outside the core bead.
13. A tire, characterized in that, Includes the cable-type tire bead as described in any one of claims 1 to 8.