Cable bead, method for manufacturing cable bead, and tire

Abstract

A cable bead, a method for manufacturing the cable bead, and a tire. The cable bead comprises an annular core wire (10). At least one layer of outer winding wire (11) is helically wound around the periphery of the core wire (10). Within a first winding cycle of the at least one layer of outer winding wire (11), at least one winding pitch different from adjacent winding pitches is provided.

Description

Cable bead, method for manufacturing cable bead and tire TECHNICAL FIELD

[0001] The present application relates to a cable bead, a method for manufacturing a cable bead and a tire, and belongs to the technical field of tire processing. BACKGROUND

[0002] The cable bead is composed of a ring-shaped core wire and an outer winding wire spirally wound around the core wire. The cable bead has good geometric stability, the inner and outer wires are uniformly stressed, the stress of the bead changes little, and the impact resistance is good, etc. It is often used in high-performance tires such as aviation tires, racing tires and special tires.

[0003] The conventional bead wire is generally coated with rubber first and then wound into a bead. The cable bead is wound into a bead by winding the outer winding wire around the core wire, and then coated with rubber. Each layer of outer winding wire is composed of one wire. The outer winding wire not only moves around the circumference of the ring-shaped core wire, but also spirally winds around the core wire, first the first winding circumference, then the second winding circumference, and so on. Through repeated winding, the head and tail of the outer winding wire are connected by a joint.

[0004] Theoretically designed cable beads will form uniform winding gaps between the outer winding wires, but due to the manufacturing characteristics of the cable bead, the outer winding wires will be closely arranged together, reducing the contact area between the rubber and the cable bead, which is not conducive to the penetration of the rubber during coating. The prior art US6244318B1 provides a cable bead, the outermost outer winding wire is wound with a number less than the theoretical number of windings to increase the winding gap and facilitate the penetration of the rubber. However, the winding gap of the cable bead of the prior art is still insufficient, and the rubber permeability is low.

[0005] SUMMARY

[0006] The purpose of the present application is to overcome the shortcomings of the prior art, provide a cable bead, a method for manufacturing a cable bead and a tire, which can design and arrange different winding pitches, change the arrangement distance of the outer winding wire on the core wire, so that there is a winding gap between the outer winding wires at the position of the different winding pitches, improve the rubber permeability, improve the bonding force between the rubber and the cable bead, and also allow the rubber to protect the cable bead more to prevent rust, and also reduce the contact friction between the outer winding wires, and improve the service life of the tire.

[0007] To achieve the above purpose, the present application adopts the following technical scheme:

[0008] In a first aspect, the present application provides a cable bead, comprising a ring-shaped core wire; at least one layer of outer winding wire is spirally wound outside the core wire; at least one winding pitch different from the adjacent winding pitch is arranged on the first winding period of at least one layer of the outer winding wire.

[0009] Further, each of the at least one layer of the outer wrapping wire has a different wrapping twist pitch than the adjacent wrapping twist pitch.

[0010] Further, at least one of the wrapping twist pitches of any layer of the outer wrapping wire is different from the adjacent wrapping twist pitch.

[0011] Further, the length L2 of any wrapping twist pitch of the outer wrapping wire and the length L1 of the adjacent wrapping twist pitch are in the range of:

[0012] Further, the length L2 of any wrapping twist pitch of the outer wrapping wire and the length L1 of the adjacent wrapping twist pitch are in the range of:

[0013] Further, when the outer wrapping wire has at least two layers, the wrapping direction of each layer of the outer wrapping wire is the same direction.

[0014] Further, when the outer wrapping wire has at least two layers, the wrapping direction of each layer of the outer wrapping wire is the opposite direction.

[0015] Further, the diameter of the core wire is 1.00-6.00 mm.

[0016] Further, the diameter of the outer wrapping wire is 0.80-3.00 mm.

[0017] Further, the outer wrapping wire is covered with a copper layer; or a zinc layer; or a brass layer; or a bronze layer; or an organic coating layer.

[0018] Further, the tensile strength of the outer wrapping wire is 2000 MPa or more.

[0019] Further, the core wire is a metal material or a non-metal material.

[0020] In a second aspect, the application provides a method for manufacturing the above-mentioned cable-type bead, comprising:

[0021] Step 1: using a wire to make a ring-shaped core wire;

[0022] Step 2: preforming the outer wrapping wire into a loop type, and making the outer wrapping wire wrap around the core wire with a length of one layer; wherein the loop type is set to have at least one loop type size of the outer wrapping wire different from the adjacent loop type in the first wrapping periodic length of the core wire, and the subsequent periodic wrapping is arranged according to the arrangement of the previous period;

[0023] Step 3: spirally wrapping the outer wrapping wire preformed into a loop type on the core wire, according to the different loop type size of the outer wrapping wire and the adjacent loop type, so that the outer wrapping wire wrapped on the core wire has different wrapping twist pitches, and thus forming uniform wrapping gaps;

[0024] Step four: after the outer wrapping wire is spirally wound on the core wire in a ring shape, the head and tail of the outer wrapping wire are fixed together by a joint to obtain a cable type tire ring with one layer;

[0025] Step five: repeating steps two to four to obtain a cable type tire ring with multiple layers.

[0026] Further, the length of the distance between the ring shape with a circumference C2 and the ring shape with a circumference C1 of the adjacent ring shape of any outer wrapping wire ring on the outer wrapping wire is L0, and the value range of L0 is 2·L1≤L0≤C0, wherein L1 is the winding lay length of the ring shape with a circumference C1 of the outer wrapping wire ring, and C0 is the circumference of the outer wrapping wire spirally wound along the core wire in one core wire ring.

[0027] Further, the length of the distance between the ring shape with a circumference C2 and the ring shape with a circumference C1 of the adjacent ring shape of any outer wrapping wire ring on the outer wrapping wire is L0, and the value range of L0 is 2·L1≤L0≤C0, wherein L1 is the winding lay length of the ring shape with a circumference C1 of the outer wrapping wire ring, and C0 is the circumference of the outer wrapping wire spirally wound along the core wire in one core wire ring.

[0028] In a third aspect, the present application provides a tire comprising the cable type tire ring.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] The cable type tire ring provided by the present application has at least one layer of outer wrapping wire spirally wound on the outer periphery of the core wire, and at least one outer wrapping wire with a different winding lay length is arranged on at least one layer of the outer wrapping wire; such a design and arrangement can obtain different winding lay lengths, which are used to change the arrangement distance of the outer wrapping wire on the core wire, so that there is a winding gap between the outer wrapping wires at the position of the different winding lay lengths, thereby improving the rubber permeability, improving the bonding force between the rubber and the cable type tire ring, allowing the rubber to better protect the cable type tire ring from rust, and reducing the contact friction between the outer wrapping wires to improve the service life of the tire.

[0031] The present application also provides a method for manufacturing the cable type tire ring, wherein the outer wrapping wire is wound on the core wire first, the entire outer wrapping wire is selected according to the size of the ring shape of one or more outer wrapping wire rings and the different arrangement of the adjacent ring shape, and the periodic pre-preparation is performed correspondingly, and then the spiral winding is performed, so that the cable type tire ring with the same effect as the present application is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0032] FIG. 1 is a winding schematic diagram of a cable type tire ring in the prior art;

[0033] FIG. 2 is a winding schematic diagram of a specific embodiment of a cable type tire ring provided by the present application;

[0034] FIG. 3 is a state diagram of the pre-preparation process of the outer wrapping wire in a method for manufacturing a cable type tire ring provided by the present application;

[0035] Fig. 10, core wire; 11, outer winding wire; 12, gap. DETAILED DESCRIPTION

[0036] The application will be further described below with reference to the drawings. The following examples are only used to more clearly illustrate the technical solutions of the application, and cannot be used to limit the protection scope of the application.

[0037] The cable type bead manufacturing in actual production is explained as follows: each layer of the outer winding wire 11 of the core wire 10 is composed of one wire, and the outer winding wire 11 moves around the circumference of the annular core wire 10 and spirally winds around the core wire 10 itself. The outer winding wire 11 spirally advances along the circumference of the annular core wire 10 by one pitch, which is called one winding pitch. The outer winding wire 11 advances along the circumference of the annular core wire 10 by one annular circumference of the core wire 10, which is called one winding circumference. Due to the elasticity of the outer winding wire 11, the outer winding wire 11 is tightly attached to the annular core wire 10. When the winding pitches are the same, the outer winding wire 11 of the second winding circumference will tightly abut against the outer winding wire 11 of the first winding circumference, the outer winding wire 11 of the third winding circumference will tightly abut against the outer winding wire 11 of the second winding circumference, and so on. This will make the winding gap 12 between the outer winding wires 11 of the cable type bead smaller, which is not conducive to the penetration of rubber.

[0038] The winding schematic diagram of the cable type bead in the prior art is provided in Fig. 1. The outer winding wire 11 moves around the circumference of the core wire 10 and spirally winds around the core wire 10 itself. As shown in Fig. 1-(1), the outer winding wire 11 spirally advances along the circumference of the annular core wire 10 by one pitch, i.e. the arc length of the annular core wire 10 corresponding to the angle a in Fig. 1, which is called one winding pitch L1. The outer winding wire 11 continues to advance by one pitch, thereby forming an adjacent winding pitch L1. The outer winding wire 11 spirally advances along the circumference of the annular core wire 10 by one annular circumference of the core wire 10, which is called one winding circumference C0. As shown in Fig. 1-(2), after the first winding circumference is wound, the outer winding wire 11 starts to wind the second winding circumference. The outer winding wire 11 wound on one layer is the same wire, only corresponding to the corresponding winding circumference. Then the third winding circumference is wound, and so on, as shown in Fig. 1-(3), until all the winding is completed. The winding gap 12 and the like will be formed between one winding pitch and the adjacent winding pitch, but within one winding pitch, the outer winding wire 11 wound for one turn and the outer winding wire 11 wound for the second turn tightly abut together, and almost no winding gap 12 can be left, which cannot allow the penetration of rubber.

[0039] Example 1

[0040] The embodiment provides a cable type bead, which comprises a ring-shaped core wire 10. At least one layer of outer winding wire 11 is spirally wound on the outer periphery of the core wire 10, and at least one winding pitch different from the adjacent winding pitch is arranged on the first winding period of the at least one layer of outer winding wire 11. That is, at least one outer winding wire 11 is spirally wound on the outer periphery of the core wire 10, so that the outer periphery of the core wire 10 is covered with one layer of the outer winding wire 11, and the state of the one layer is obtained by one outer winding wire 11 through periodic winding. If the outer winding wire 11 wound on the core wire 10 is multiple layers, the winding direction of each layer of outer winding wire 11 is the same or opposite. Secondly, the winding mode of at least one winding pitch different from the adjacent winding pitch is arranged on the first winding period as required, and the winding mode in the subsequent layer is arranged correspondingly according to the winding mode of the first winding period.

[0041] Selection of the outer winding wire 11 and the core wire 10:

[0042] The outer winding wire 11 is covered with a copper layer / a zinc layer / a brass layer / a bronze layer / an organic coating; the tensile strength of the outer winding wire 11 is above 2000 MPa; and the diameter of the outer winding wire 11 is selected in the range of 0.80-3.00 m.

[0043] The core wire 10 is a metal material or a non-metal material; and the diameter of the core wire 10 is selected in the range of 1.00-6.00 mm.

[0044] Preferably, the length L2 of any one winding pitch of the outer winding wire 11 and the length L1 of the adjacent winding pitch are selected in the range of: The length L2 of any one winding pitch of the outer winding wire 11 and the length L1 of the adjacent winding pitch are selected in the range of: The range of values can avoid the following cases:

[0045] If the difference between the length L2 of the different winding pitch and the length L1 of the adjacent winding pitch is too small, more winding gaps cannot be obtained. If the difference between the length L2 of the different winding pitch and the length L1 of the adjacent winding pitch is too large, one of the winding pitches L1 and L2 is too large or too small, when one of them is too large, the force of the outer winding wire on the core wire is small and the outer winding wire is not tightly attached to the core wire, and when one of them is too small, the force of the outer winding wire on the core wire is large and the core wire is twisted.

[0046] The winding mode described above includes that each winding pitch of at least one layer of outer winding wire 11 is different from the adjacent winding pitch, or at least one winding pitch of any one layer of outer winding wire 11 is different from the adjacent winding pitch, and the winding mode can be improved and deformed in the premise of not departing from the technical principles of the present application, and these improvements and deformations should also be regarded as the protection scope of the present application.

[0047] Implementation two:

[0048] This embodiment provides a cable type bead with the structure of 1 x 3.00 + (10) x 1.30. That is, the core wire 10 has a diameter of 3.00 mm; the outer winding wire 11 has a diameter of 1.30 mm; and there are 10 winding turns in total. The number of winding turns of each winding turn is 6, which are winding turn 1, winding turn 2, winding turn 3, winding turn 4, winding turn 5 and winding turn 6. The six winding turns are adjacent to each other, and since they are wound on the annular core wire 10, winding turn 6 is also adjacent to winding turn 1. As shown in Table 1 below, in Test 1, only winding turn 2 is different from the adjacent winding turns 2 and 3. In Example 2, each winding turn is different from the adjacent winding turn.

[0049] The rubber permeability is evaluated by using the air retention rate under the vulcanization condition. The cable type bead is coated with rubber and vulcanized, and the cable type bead with rubber is divided into equal parts, and the number of divided parts is the number of winding turns, that is, divided into 6 parts. The air retention rate of each part of the cable type bead is detected by using the pressure drop method, and then the average value is calculated. The higher the average value of the obtained air retention rate is, and the highest value is 1. The closer to 1, the better the rubber permeability is.

[0050] For the prior art cable type bead 1 x 3.00 + (10) x 1.30 with the same structure, the six winding turns are the same, and the present embodiment compares Test 1 and Test 2 with the prior art Comparative Example 1, and the test results are shown in Table 1.

[0051] Table 1

[0052] As can be seen from Table 1, compared with the average value of the air retention rate under the vulcanization condition of the prior art Comparative Example 1, the air retention rates of Test 1 and Test 2 are better, which indicates that Test 1 and Test 2 have better rubber permeability. Secondly, for Test 1 in which only winding turn 2 is different from the adjacent winding turns 2 and 3, and Test 2 in which each winding turn is different from the adjacent winding turn, it can be seen from the test structure in Table 1 that Test 2 has better rubber permeability. The number of adjacent winding turns to be set is selected according to the actual situation.

[0053] Example Three

[0054] In combination with Embodiment One and Embodiment Two, this embodiment provides a cable type bead, the structure of which is 2.15+(7+13)×1.55. That is, the core wire 10 has a diameter of 2.15 mm, the outer winding wire 11 has a diameter of 1.55 mm, and the winding is 2 layers, with 7 winding turns in the first layer and 13 winding turns in the second layer. The number of winding turns in the first layer is 6, and the number of winding turns in the second layer is 6. In Test 3, the winding turns 2 in the first layer are different from the adjacent winding turns, and the winding turns 2 in the second layer are different from the adjacent winding turns. In Test 4, each winding turn in the first layer is different from the adjacent winding turn, and each winding turn in the second layer is different from the adjacent winding turn.

[0055] For the prior art cable type bead 2.15+(7+13)×1.55 of the same structure, the first layer has 6 winding turns that are all the same, and the second layer has 6 winding turns that are all the same. Tests 3 and 4 of this embodiment are compared with the comparative example of the prior art, and the test results are shown in Table 2.

[0056] Table 2

[0057] As can be seen from Table 2, compared with the average value of the air retention rate of the comparative example 2 of the prior art under vulcanization conditions, the air retention rates of Tests 3 and 4 are better, indicating that Tests 3 and 4 have better rubber permeability. In combination with Table 1 of Embodiment One, Tests 3 and 4 are also compared with each other, and it can be determined that each winding turn on the outer winding wire 11 is different from the adjacent winding turn, and the air retention rate under the vulcanization conditions in the winding of multiple layers is also relatively high.

[0058] Embodiment Four:

[0059] In combination with Figs. 2 and 3, this embodiment provides a method for manufacturing the cable type bead described in any of the above embodiments, which comprises

[0060] Step One: using a wire to make a ring-shaped core wire 10.

[0061] Step Two: preforming the outer winding wire 11 into a ring shape, and winding the outer winding wire 11 on the core wire 10 with a length of one layer. Among them, the ring shape is set to have at least one ring shape size of the outer winding wire ring that is different from the adjacent ring shape in the first periodic length of winding the core wire 10, and the subsequent periodic winding is sequentially arranged according to the arrangement of the previous period. That is, in the first layer, the second layer, or the nth layer, the winding period is set to have one or more ring shape sizes of the outer winding wire ring that are different from the adjacent ring shape in the first period, and after winding one period according to the setting, the winding mode of the second period is wound according to the ring shape setting and distribution position of the first period.

[0062] The method of manufacturing the cable type bead is shown in the figure 3, the outer wrapping wire 11 obtains the natural bead type in the step two, A1 is the distance of two adjacent outer wrapping wire bead, the length of the outer wrapping wire 11 corresponding to A1 is called the circumference C1 of the outer wrapping wire bead, A2 is the length of the outer wrapping wire 11 corresponding to, which is called the circumference C2 of the outer wrapping wire bead of different bead type. The circumference C2 of the outer wrapping wire bead is different from the circumference C1 of the outer wrapping wire bead. A3 is the distance of the circumference C2 of two adjacent outer wrapping wire bead, and the length of the outer wrapping wire 11 corresponding to A3 is called the distance length L0 of the periodicity of the outer wrapping wire bead of different bead type (the circumference of the outer wrapping wire bead of two adjacent outer wrapping wire bead is C2).

[0063] Preferably, the circumference C2 of any outer wrapping wire bead on the outer wrapping wire 11 and the circumference C1 of the adjacent bead type are in the range of: The range of values is to obtain the length L2 of the wrapping twist pitch and the length L1 of the adjacent wrapping twist pitch in the embodiment one, so that the gap of the cable type bead after the wrapping is completed is convenient for the rubber to penetrate and combine; the wrapping twist pitch is larger when the circumference of the bead type is larger, and the wrapping twist pitch is smaller when the circumference of the bead type is smaller. If it is not the corresponding case, the outer wrapping wire stress will be large and the core wire will be twisted.

[0064] Preferably, the distance length of the circumference C2 of two adjacent different outer wrapping wire bead is L0, and L0 is in the range of: 2·L1≤L0≤C0, wherein L1 is the wrapping twist pitch of the circumference C1 of the outer wrapping wire bead, and C0 is the circumference of the core wire 10 ring when the outer wrapping wire 11 spirally winds along the core wire 10. L0 refers to the length of the outer wrapping wire corresponding to A3 in the figure 3. L0 is not equal to A3, but the length of the outer wrapping wire when it is completely stretched. 2L1≤L0 is to make the distance between two different circumferences C2 larger, otherwise the wrapping gap may not be obvious. L0≤C0 is to make each C0 have a C2.

[0065] Step three: spirally winding the outer wrapping wire 11 with the preformed bead type on the core wire 10, according to the size of the outer wrapping wire 11 bead type and the difference of the adjacent bead type, so that the outer wrapping wire 11 wound on the core wire 10 has different wrapping twist pitches, and then forming the uniform wrapping gap 12.

[0066] Step four: after the outer wrapping wire 11 with the preformed bead type is spirally wound on the core wire 10 as a layer, the head and tail of the outer wrapping wire 11 are fixed together by the joint, and the cable type bead successfully wound as a layer is obtained.

[0067] Step five: repeating the step two and the step four to obtain the multi-layer cable type bead.

[0068] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A cable bead characterized in that, The core wire is annular; at least one layer of outer winding wire is spirally wound on the outer periphery of the core wire; at least one winding lay is arranged in a first winding period on the at least one layer of outer winding wire.

2. The cable bead according to claim 1, characterized in that Each winding lay on the at least one layer of outer winding wire is different from an adjacent winding lay.

3. The cable bead according to claim 1, wherein At least one winding lay on any layer of outer winding wire is different from an adjacent winding lay.

4. The cable bead of claim 1, wherein The length L2 of any one winding pitch of the outer wrapping wire and the length L1 of the adjacent winding pitch are in the range of:

5. The cable bead according to claim 4, characterized in that The length L2 of any one winding pitch of the outer wrapping wire and the length L1 of the adjacent winding pitch are in the range of:

6. The cable bead of claim 1, wherein, When the outer winding wire is at least two layers, the winding direction of each layer of outer winding wire is the same direction.

7. The cable bead of claim 1, wherein, When the outer winding wire is at least two layers, the winding direction of each layer of outer winding wire is the opposite direction.

8. The cable bead of claim 1, wherein, The diameter of the core wire is 1.00-6.00 mm.

9. The cable bead according to claim 8, characterized in that The diameter of the outer winding wire is 0.80-3.00 mm.

10. The cable bead of claim 1, wherein, The outer winding wire is covered with a copper layer; or a zinc layer; or a brass layer; or a bronze layer; or an organic coating layer.

11. The cable bead of claim 1, wherein, The tensile strength of the outer winding wire is 2000 MPa or more.

12. The cable bead of claim 1, wherein, The core wire is a metal material or a non-metal material.

13. A method for manufacturing the cable type bead as claimed in any one of claims 1 to 12, comprising: Step 1: using a wire to make an annular core wire; Step 2: preforming the outer winding wire into a loop type, and making the outer winding wire wound on the core wire with a length of one layer; wherein the loop type is arranged to have at least one loop type size of the outer winding wire loop different from an adjacent loop type in a first winding periodic length of the core wire, and subsequent periodic winding is arranged according to the arrangement of the previous period; Step 3: spirally winding the outer winding wire preformed into a loop type on the core wire, according to the different loop type size of the outer winding wire and the adjacent loop type, so that the outer winding wire wound on the core wire has different winding lays, thereby forming uniform winding gaps; Step 4: after the outer winding wire preformed into a loop type is spirally wound on the core wire for one layer, the head and tail of the outer winding wire are fixed together by a joint to obtain a cable type bead of one layer; Step 5: repeating steps 2 to 4 to obtain a cable type bead of multiple layers.

14. The manufacturing method of the cable bead according to claim 13, characterized by, The range of the circumference C2 of any one coil of the outer winding and the circumference C1 of the adjacent coil is:

15. The manufacturing method of the cable bead according to claim 14, characterized by, The distance length L0 of the loop type circumference C2 of two adjacent different outer winding wire loops is in the range of 2·L1≤L0≤C0, wherein L1 is the winding lay of the loop type circumference C1 of the outer winding wire loop, and C0 is the circumference of one core wire annulus in the forward direction of the outer winding wire spirally wound along the core wire.

16. A tire characterized by The cable type bead of claim 13. The cable type bead of claim 13.

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