A vulcanization mold for tire

Abstract

The present invention discloses a vulcanization mold for a tire, comprising a tire lip ring; the tire lip ring has a first tire lip ring portion and a second tire lip ring portion; the first tire lip ring portion has an outer shaping surface for shaping the outer side surface of the tire bead, a heel shaping surface for shaping the bead heel of the tire bead, and a bead bottom shaping surface for shaping the bead bottom surface; the second tire lip ring portion is located axially inside the first tire lip ring portion, and the second tire lip ring portion has a plurality of tire lip ring pieces that are detachably stacked in the axial direction, and the plurality of tire lip ring pieces and a vulcanization core mold or a vulcanization air bag together construct a bead toe shaping surface suitable for shaping the bead toe of the tire bead. The present invention can realize that the height of the tire lip ring can be freely adjusted according to actual production, thereby improving production efficiency, facilitating management, and reducing production costs.

Description

Technical Field

[0001] The invention relates to the technical field of tires, in particular to a vulcanization mold of a tire. Background Art

[0002] like Figure 1 As shown, the pneumatic tire T comprises a tread 1, a carcass 2, a sidewall 3 and a bead 4, wherein the bead 4 comprises a bead outer side portion 41 located outside the tire, a bead heel 42 having an arc surface, a bead bottom portion 43 contacting and matching with the rim, a bead toe portion 44 located inside the tire forming a pointed portion, and a bead core 45 formed in a bundle shape by a plurality of steel wires. Generally, the axial distance D between the bead outer side portion 41 and the bead toe portion 44 of the bead 4 is called the tire lip width.

[0003] The mold component for forming the tire bead 4 of the mold used to form the tire T is called a bead ring. The bead ring of the current mold usually adopts an integral bead ring, that is, the mold bead ring corresponding to the bead heel 42 and the bead toe 44 used to form the tire bead 4 forms an integral surface. The current mold bead ring also adopts a split bead ring, that is, the mold bead ring corresponding to the bead bell 42 and the bead toe 44 used to form the tire bead 4 forms a split surface, especially the arc surface of the mold bead ring corresponding to the bead heel 42 is split.

[0004] The bead width D of the tire bead 4 corresponds to the height of the bead ring on the mold. Whether it is an integral bead ring or a split bead ring, the bead ring height is fixed, and the mold bead ring height is matched and fixed with the tire bead width. However, in the actual production process, due to the structural adjustment of the tire carcass 2 or the structure of the bead 4, the bead width D of the tire bead will change accordingly. In order to adjust the tire bead width, the current bead ring with a fixed height is often lowered or raised; or corresponding mold bead rings are configured for tires of the same specification but different carcass structures. This will lead to a longer mold bead ring production cycle, thereby affecting the tire production efficiency; at the same time, configuring mold bead rings of different heights will also lead to waste of production costs; there are also many problems in the management of mold bead rings. In addition, whether it is an integral bead ring or a split bead ring, it is heavy in itself, and it is time-consuming and labor-intensive to replace different bead rings, and it is easy to be damaged. For tires of large size specifications, the above problems are particularly prominent. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, one object of the present invention is to provide a tire vulcanization mold, which can realize that the height of the tire lip ring can be freely adjusted according to actual production, thereby improving production efficiency, facilitating management, and reducing production costs.

[0006] To achieve the above object, an embodiment of the present invention provides a tire vulcanization mold, which includes a tire lip ring;

[0007] The bead ring comprises a first bead ring portion and a second bead ring portion; the first bead ring portion comprises an outer side forming surface for forming the outer side surface of the bead of the tire, a heel forming surface for forming the heel of the bead, and a bead bottom forming surface for forming the bead bottom surface; the second bead ring portion is located axially inside the first bead ring portion, the second bead ring portion comprises a plurality of bead ring pieces which are detachably stacked in the axial direction, and the plurality of bead ring pieces and a vulcanization core mold or a vulcanization air bag together constitute a bead toe forming surface suitable for forming the bead toe of the bead.

[0008] According to a tire vulcanization mold of an embodiment of the present invention, a plurality of detachable and stacked bead ring pieces are arranged on the second bead ring part, so that the mold can freely adjust the height of the bead ring according to production requirements, thereby achieving the purpose of improving production efficiency; at the same time, when replacing different bead ring pieces, there is no need to replace the first bead ring part with a larger weight, which can reduce labor intensity and reduce the probability of bead ring damage; and can reduce the cycle and cost of bead ring production and maintenance.

[0009] In addition, the tire vulcanization mold according to the above embodiment of the present invention may also have the following additional technical features:

[0010] Optionally, the thicknesses of the plurality of tire lip ring segments are equal.

[0011] Optionally, the thicknesses of the plurality of tire lip ring segments are not equal.

[0012] Furthermore, the thickness of the tire lip ring piece is ≥1 mm and the height of the second tire lip ring portion is ≤25 mm.

[0013] Optionally, an angle formed by the radial outer surface of the second bead ring portion in the axial direction is greater than or equal to an angle formed by the radial outer surface of the first bead ring portion in the axial direction.

[0014] Optionally, radial widths of two opposite surfaces of the bead ring segments in the adjacent first bead ring portion and the second bead ring portion are equal.

[0015] Optionally, radial widths of two opposite surfaces of two adjacent bead ring segments in the second bead ring portion are equal.

[0016] Optionally, a plurality of mounting holes are distributed on the bead ring pieces of the second bead ring portion, the mounting holes extend from the second bead ring portion into the first bead ring portion, and connecting pieces are inserted into the mounting holes to detachably stack a plurality of bead ring pieces.

[0017] Optionally, the second bead ring portion has a fixed area and an active area, the active area is located axially inside the fixed area, the fixed area is located axially inside the first bead ring portion, and the thickness of the bead ring piece located in the active area is smaller than the thickness of the bead ring piece located in the fixed area.

[0018] Furthermore, the thickness of the bead ring segment located in the active area is ≥1 mm and the total thickness of a plurality of bead ring segments located in the active area is ≤25 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of a pneumatic tire in the prior art;

[0020] Figure 2 A partial schematic diagram of a vulcanization mold for a tire according to Embodiment 1 of the present invention;

[0021] Figure 3 for Figure 2 A partial enlarged view of the tire lip ring;

[0022] Figure 4 It is a partial enlarged view of the tire lip ring according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0025] In order to describe the present application more clearly, the orientation of the tire is first defined: CL represents the center plane of the tire; the tire close to the center plane CL represents the inner side, and the tire away from the center plane CL represents the outer side; Figure 1 The horizontal direction is the axial direction of the tire, and the vertical direction is the radial direction of the tire; correspondingly, Figure 2 to Figure 4The horizontal direction is the radial direction of the tire, and the vertical direction is the axial direction of the tire. A direction away from the tire CL represents the axial outer side of the tire, and a direction close to the tire CL represents the axial inner side of the tire; a direction away from the tire rotation center represents the radial outer side of the tire, and a direction close to the tire rotation center represents the radial inner side of the tire.

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Embodiment 1

[0028] like Figure 2 and Figure 3 As shown, a vulcanization mold of a tire disclosed in the first embodiment of the present invention is used to manufacture Figure 1 Pneumatic tire shown.

[0029] like Figure 2 As shown, the vulcanization mold of this embodiment includes a mold upper mold body 100, a mold lower mold body 200, an upper bead ring 20, a lower bead ring 30, an upper bead ring fixing part 50, a lower bead ring fixing part 60, and a vulcanization bladder 10. The mold upper mold body 100 has inner mold cavities 1m and 3m for forming the tire tread 1 and the sidewall 3; the upper bead ring 20 is used to form the tire bead 4; the mold lower mold body 200 has inner mold cavities 1m and 3m for forming the tire tread 1 and the sidewall 3; the lower bead ring 30 is used to form the tire bead 4.

[0030] In this embodiment, the component used to form the inner cavity of the tire is a vulcanizing airbag 10, and the upper bead ring fixing member 50 fixes the upper clamping end of the vulcanizing airbag 10; the lower bead ring fixing member 60 fixes the lower clamping end of the vulcanizing airbag 10 (not shown in the figure). During the tire vulcanization process, the vulcanizing airbag 10 is filled with a vulcanizing medium to form a pneumatic tire T under certain conditions. Of course, in other examples, the vulcanizing airbag can also be replaced by a rigid vulcanizing core mold for vulcanizing the tire.

[0031] like Figure 2 and Figure 3 As shown, the bead lip ring 30 has an outer surface 41m of the outer side of the bead of the tire bead 4, an outer surface 42m of the heel of the tire bead 4, an outer surface 43m of the bottom of the tire bead 4, and an outer surface 44m of the toe of the tire bead 4. The toe 44 with a pointed part is formed by the outer surface 44m of the bead lip ring and the vulcanization bladder 10.

[0032] Specifically, the bead ring 30 has a first bead ring portion 31 and a second bead ring portion 32; the first bead ring portion 31 has an outer shaping surface (i.e., 41m) for shaping the outer side surface of the bead of the tire, a heel shaping surface (i.e., 42m) for shaping the heel of the bead, and a bead bottom shaping surface (i.e., 43m) for shaping the bottom surface of the bead; the second bead ring portion 32 is located axially inside the first bead ring portion 31, and has a plurality of bead ring pieces that are detachably stacked in the axial direction, and the plurality of bead ring pieces and a vulcanization core mold or a vulcanization air bag together form a bead toe shaping surface (i.e., 44m) suitable for shaping the bead toe of the bead. In other words, the second bead ring portion 32 adjusts the height of the bead ring by disassembling and assembling the bead ring pieces.

[0033] Therefore, by providing several detachable and stackable bead ring pieces of the second bead ring portion 32, the mold can freely adjust the bead ring height according to production requirements, thereby achieving the purpose of improving production efficiency; at the same time, when replacing different bead ring pieces, there is no need to replace the heavier first bead ring portion 31, which can reduce labor intensity and reduce the probability of bead ring damage; and can reduce the cycle and cost of bead ring production and maintenance.

[0034] Figure 3 Shown Figure 2 The partially enlarged diagram in the figure is a schematic diagram of the partially enlarged structure of the lower tire lip ring 30 of this embodiment. In this embodiment, Figure 2 and Figure 3 The bead rings of the upper and lower molds of the mold have the same structure, and the lower bead ring 30 will be specifically described here. The bead ring 30 comprises a first bead ring portion 31 and a second bead ring portion 32; the second bead ring portion 32 is formed by a plurality of bead ring pieces detachably stacked in the axial direction.

[0035] like Figure 2 As shown, the outer surface 41m of the bead outer side, the outer surface 42m forming the bead heel, and the outer surface 43m forming the tire bottom of the bead ring 30 together constitute the radial outer surface of the first bead ring portion 31. The first bead ring portion 31 shown in this embodiment is an integral type, that is, the outer surface 41m forming the bead outer side, the outer surface 42m forming the bead heel, and the outer surface 43m forming the tire bottom of the bead ring together constitute the radial outer surface of the first bead ring portion 31. However, it is not limited to this, and the first bead ring portion 31 of this embodiment can also be split to form a split bead ring, that is, the arc surface of the outer surface 42m forming the bead heel is split.

[0036] The second bead ring portion 32 is located axially inside the first bead ring portion 31 and is formed by axially stacking a plurality of bead ring pieces. Figure 3The second bead ring portion 32 is exemplarily shown to be composed of five bead ring segments, which are bead ring segments 32a, 32b, 32c, 32d, and 32e from the axial outer side to the axial inner side. Of course, the number of bead ring segments is not restrictive, and the number of bead ring segments can be determined according to actual production needs.

[0037] In some examples, the axial thickness t of each bead ring piece of the second bead ring portion 32 is equal. The radial outer surface 32m of the second bead ring portion 32 is composed of the radial outer surfaces of several bead ring pieces; and together with the radial outer surface of the first bead ring portion 31, it forms a shaping surface of the tire bead.

[0038] The angle β formed in the axial direction by the radial outer surface 32m formed by the stacked bead ring pieces is the same as the angle α formed in the axial direction by the outer surface 43m of the first bead ring portion 31 forming the bottom of the tire; similarly, the angle β formed in the axial direction by the radial outer surface 32m formed by the stacked bead ring pieces may be greater than the angle α formed in the axial direction by the outer surface 43m of the first bead ring portion 31 forming the bottom of the tire. When the angle β formed in the axial direction by the radial outer surface 32m formed by the stacked bead ring pieces is the same as the angle α formed in the axial direction by the outer surface 43m of the first bead ring portion 31 forming the bottom of the tire, the angle of the tire bead forms a single angle; when the angle β formed in the axial direction by the radial outer surface 32m formed by the stacked bead ring pieces is greater than the angle α formed in the axial direction by the outer surface 43m of the first bead ring portion 31 forming the bottom of the tire, the angle of the tire bead forms a double angle, which can ensure that the bead and the rim fit tightly when the tire is used.

[0039] The bead ring height D is composed of the height d1 of the first bead ring portion 31 and the height d2 of the second bead ring portion 32. Considering the operability and management convenience of the second bead ring portion 32, the thickness t of the plurality of bead ring pieces constituting the second bead ring portion 32 is ≥ 1 mm and the height d2 of the second bead ring portion 32 is ≤ 25 mm. It is worth noting that the thickness and height here are for Figure 2 to Figure 4 As for the axial dimension of the tire, since the axial dimension of each of the plurality of bead ring segments is not greater than one fifth of the bead ring height D, the axial dimension of each bead ring segment is expressed by thickness.

[0040] Furthermore, the radial width W2 of the first surface 32aW of the bead ring piece 32a adjacent to the first bead ring piece 31 in the second bead ring portion 32 and opposite to the first bead ring portion 31 is equal to the radial width W1 of the second surface 31s of the first bead ring portion 31 and opposite to the bead ring piece 32a; similarly, in the second bead ring portion 32, the radial widths between the opposite surfaces of the adjacent bead ring pieces stacked on each other are equal. Figure 3As shown, in the second bead ring portion 32, the bead ring piece 32a and the bead ring piece 32b are adjacent and stacked on each other, and the radial width of the third surface 32aN of the bead ring piece 32a and the fourth surface 32bW of the bead ring piece 32b stacked on each other is equal.

[0041] Furthermore, in order to facilitate the installation and removal of the bead ring piece, the bead ring piece constituting the second bead ring portion 32 is provided with a mounting hole 33, and the mounting hole 33 extends from the second bead ring portion 32 into the first bead ring portion 31, and then a connecting member 34 is inserted into the mounting hole 33 to connect the second bead ring portion 32 and the first bead ring portion 31 to achieve detachable stacking of several bead ring pieces. Specifically, the bead ring piece constituting the second bead ring portion 32 is provided with a plurality of mounting holes 33, and the plurality of mounting holes 33 are evenly distributed along the circumferential direction of the bead ring piece; similarly, the first bead ring portion 31 is provided with a plurality of mounting holes 33 distributed circumferentially, and these mounting holes 33 correspond to the plurality of mounting holes 33 provided on the bead ring piece of the second bead ring portion 32 in the axial direction. The external connecting member 34 is inserted into the mounting hole 33 to connect the second bead ring portion 32 with the first bead ring portion 31. The connecting member 34 may be a screw, and the mounting hole 33 may be a threaded hole, so that the bead ring piece can be easily assembled and disassembled through threaded cooperation.

[0042] In some known embodiments, the bead lip rings of the upper and lower molds have different structures, but the outer surface 41m of the bead outer side, the outer surface 42m of the bead heel, the outer surface 43m of the bead bottom, and the bead toe portion 44m with a pointed portion on the bead lip ring of the mold together form the radial outer surface of the tire bead, and therefore, the bead lip rings of the upper and lower molds have different structures, which will not be described in detail in this embodiment; those skilled in the art will know according to the present invention. Figures 2-3 The embodiment shown can be changed or replaced accordingly. Similarly, the upper bead ring fixing member 50 and the lower bead ring fixing member 60 that cooperate with the upper and lower bead rings can also be provided with a plurality of bead ring assembly ring pieces correspondingly, which will not be elaborated in this embodiment.

[0043] In this embodiment, the bead ring 30 has a first bead ring portion 31 and a second bead ring portion 32, and the second bead ring portion 32 is formed by a plurality of bead ring pieces that can be detachably stacked. By using the bead ring of this embodiment, the corresponding bead ring pieces can be added or reduced according to demand to achieve the required bead ring height, so that the mold bead ring height can be freely adjusted according to actual production; the production cycle required for the mold bead ring adjustment or the production cycle of the new bead ring is reduced, thereby improving the production efficiency.

[0044] At the same time, when the bead ring of this embodiment is used to replace different bead ring pieces, there is no need to separate the heavier first bead ring portion 31 from the upper and lower mold bodies of the mold. It is only necessary to add a certain number of bead ring pieces to the first bead ring portion 31 accordingly, which greatly reduces the labor intensity and the probability of bead ring damage.

[0045] Embodiment 2

[0046] The structure and principle of this embodiment are substantially the same as those of the first embodiment, and the same parts will not be described in detail again. Figure 4 A partial enlarged view of a bead ring of another embodiment is shown. The bead ring 70 is composed of a first bead ring portion 71 and a second bead ring portion 72; the second bead ring portion 72 is formed by a plurality of bead ring pieces stacked detachably in the axial direction. The outer surface 41n forming the outer side of the bead, the outer surface 42n forming the bead heel, and the outer surface 43n forming the bottom of the tire on the bead ring 70 together constitute the radial outer surface of the bead ring 70. The bead ring 70 shown in this embodiment is of an integral type, that is, the outer surface 41n forming the outer side of the bead, the outer surface 42n forming the bead heel, and the outer surface 43n forming the bottom of the tire on the bead ring together constitute the radial outer surface of the bead ring 70. However, it is not limited to this, and the bead ring 70 of this embodiment can also be split to form a split bead ring, that is, the arc surface of the outer surface 42n forming the bead heel is split.

[0047] The second bead ring portion 72 is located axially inside the first bead ring portion 71 and is formed by axially stacking a plurality of bead ring pieces. The radial outer surface 72n of the second bead ring portion 72 is formed by the radial outer surfaces of a plurality of bead ring pieces; and together with the radial outer surface of the first bead ring portion 71, forms the bead of the tire.

[0048] Figure 4The second tire lip ring portion 72 is exemplarily shown to be composed of 7 tire lip ring pieces, which are tire lip ring pieces 72a, 72b, 72c, 72d, 72e, 72f, and 72g from the axial outer side to the axial inner side. Of course, the number of tire lip ring pieces is not limited to this, and the number of tire lip ring pieces can be determined according to actual production needs. In this embodiment, the thickness of the several tire lip ring pieces constituting the second tire lip ring portion 72 in the axial direction is not equal. The tire lip ring height D is composed of the height d1 of the first tire lip ring portion 71 and the height d2 of the second tire lip ring portion 72; wherein the height d2 of the second tire lip ring portion 72 is composed of the height d3 of the fixed area and the height d4 of the active area, that is, the second tire lip ring portion 72 is composed of a fixed area and an active area. In the second bead ring portion 72 of the present embodiment, the fixed area is composed of bead ring pieces 72a, 72b, and 72c; the fixed area composed of bead ring pieces 72a, 72b, and 72c does not participate in the installation and removal of the bead ring pieces, that is, the height d3 of the fixed area is fixed; the active area is composed of bead ring pieces 72d, 72e, 72f, and 72g; the thickness of each bead ring piece constituting the fixed area is greater than the thickness of each bead ring piece constituting the active area. In the active area of ​​the second bead ring portion 72, the thickness t of the bead ring piece is ≥1mm and the height d4 of the active area is ≤25mm. In the present embodiment, the bead ring 70 is composed of the first bead ring portion 71 and the second bead ring portion 72, and the second bead ring portion 72 is composed of the fixed area and the active area. The gap between the first bead ring portion 71 and the second bead ring portion 72 can be used to discharge the gas between the mold and the tire, thereby improving the appearance quality of the tire bead.

[0049] Similarly, to facilitate the installation and removal of the bead ring piece, the bead ring piece constituting the second bead ring portion 72 is provided with a plurality of mounting holes 74 evenly distributed along the circumferential direction of the bead ring piece, and the mounting holes 74 also extend from the second bead ring portion 72 into the first bead ring portion 71; at the same time, the second bead ring portion 72 and the first bead ring portion 71 are fixedly connected by a connecting member 74.

[0050] In this embodiment, the bead ring 70 is composed of a first bead ring portion 71 and a second bead ring portion 72; the second bead ring portion 72 is formed by stacking a plurality of bead ring pieces; the second bead ring portion 72 is composed of a fixed area and an active area; the thickness of each bead ring piece constituting the fixed area is greater than the thickness of each bead ring piece constituting the active area. The bead ring of this embodiment can form an exhaust channel by utilizing the installation gap between the bead ring pieces and the gap between the holes, thereby improving the appearance quality of the tire bead; at the same time, the corresponding bead ring pieces can be increased or decreased according to demand to achieve the required bead ring height, thereby realizing that the mold bead ring height can be freely adjusted according to actual production; reducing the production cycle required for the mold bead ring adjustment or the production cycle of the new bead ring, thereby improving production efficiency.

[0051] At the same time, when the bead ring of this embodiment is used to replace different bead ring pieces, there is no need to separate the heavier first bead ring portion 71 from the upper and lower mold bodies of the mold. It is only necessary to increase or decrease the active area of ​​the second bead ring portion 72 by a certain number of bead ring pieces accordingly, which greatly reduces the labor intensity and reduces the probability of bead ring damage caused by adjusting the height of the mold bead ring.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A tire vulcanization mold, characterized in that: Includes tire lip ring; The bead ring comprises a first bead ring portion and a second bead ring portion; the first bead ring portion comprises an outer shaping surface for shaping the outer side surface of the bead of the tire, a heel shaping surface for shaping the heel of the bead, and a bead bottom shaping surface for shaping the bottom surface of the bead; the second bead ring portion is located axially inside the first bead ring portion, the second bead ring portion comprises a plurality of bead ring pieces which are detachably stacked in the axial direction, the plurality of bead ring pieces and a vulcanizing core mold or a vulcanizing air bag together constitute a bead toe shaping surface suitable for shaping the bead toe of the bead, a plurality of mounting holes are distributed on the bead ring piece of the second bead ring portion, the mounting holes extend from the second bead ring portion into the first bead ring portion, a connecting piece is inserted into the mounting holes to detachably stack the plurality of bead ring pieces, the second bead ring portion comprises a fixed area and a movable area, the movable area is located axially inside the fixed area, the fixed area is located axially inside the first bead ring portion, the thickness of the bead ring piece located in the movable area is less than the thickness of the bead ring piece located in the fixed area.

2. The tire vulcanization mold according to claim 1, characterized in that: The thicknesses of the plurality of tire lip ring pieces are equal.

3. The tire vulcanization mold according to claim 1, characterized in that: The thicknesses of the plurality of tire lip ring pieces are not equal.

4. The vulcanization mold for a tire according to any one of claims 1 to 3, characterized in that: The thickness of the tire lip ring piece is ≥1 mm and the height of the second tire lip ring portion is ≤25 mm.

5. The tire vulcanization mold according to claim 1, characterized in that: An angle formed by the radial outer surface of the second bead ring portion in the axial direction is greater than or equal to an angle formed by the radial outer surface of the first bead ring portion in the axial direction.

6. The tire vulcanization mold according to claim 1, characterized in that: The radial widths of two opposite surfaces of the bead ring segments in the adjacent first bead ring portion and the second bead ring portion are equal.

7. The tire vulcanization mold according to claim 1, characterized in that: The radial widths of two opposite surfaces of two adjacent bead ring segments in the second bead ring portion are equal.

8. The tire vulcanization mold according to claim 1, characterized in that: The thickness of the bead ring piece located in the active area is ≥1 mm and the total thickness of the plurality of bead ring pieces located in the active area is ≤25 mm.

Images