A tread vulcanization tire mold

Abstract

The application discloses a kind of tread vulcanization tire mould, belong to tire vulcanization equipment technical field, including base;Rigid inner mould is located on base;Upper cover can move in vertical direction;Outer mould includes the pattern surface that is equipped on the inner wall surface of pattern block;Upper cover moves along vertical direction can drive pattern block to move;Positioning ring is located on base and / or upper cover;Positioning ring has first locating surface, second locating surface and working surface on;Tire mould has mould closing and mould opening state;In mould closing state, rigid inner mould and first locating surface abut, pattern block and second locating surface abut, at least part of the outer periphery of rigid inner mould, pattern surface and working surface form vulcanization cavity jointly;In mould opening state, rigid inner mould and pattern block are separated from positioning ring;When mould closing, the positioning ring of the application, rigid inner mould and pattern block form vulcanization cavity jointly, positioning ring accurately positions rigid inner mould and pattern block to guarantee the vulcanization quality of tire, and avoid rigid inner mould and pattern block to wear.

Description

Technical Field

[0001] This invention relates to the field of tire vulcanization equipment technology, and specifically to a tire tread vulcanization mold. Background Technology

[0002] Currently, most tires on the market are pneumatic tires. Pneumatic tires use the high pressure of compressed air inside the tire to bear the vehicle's load and provide good ride comfort. However, pneumatic tires are prone to safety accidents such as air leaks and blowouts, which affect vehicle driving safety. As the industry pays more and more attention to tire safety, traditional pneumatic tires can no longer meet the needs, and airless tire technology has emerged.

[0003] Since pneumatic tires only require vulcanization of the tread portion, a special tread vulcanization mold is needed. The tread vulcanization mold uses a rigid inner mold, which directly abuts against the tread blocks to form a vulcanization cavity that accommodates the tire blank. Existing tread vulcanization molds have insufficient fitting precision between the rigid inner mold and the tread blocks during the tire vulcanization process, resulting in problems such as insufficient tire vulcanization quality and poor tire dimensional accuracy.

[0004] To address the aforementioned issues, developing a tread vulcanizing tire mold that can accurately position the rigid inner mold and tread blocks during mold closing to ensure vulcanization quality is an urgent problem to be solved at present. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a tread vulcanizing tire mold. During mold closing, the positioning ring, the rigid inner mold, and the tread blocks together form a vulcanizing cavity that accommodates the tire blank. The positioning ring precisely positions the rigid inner mold and the tread blocks, which can ensure the vulcanization quality of the tire.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: This invention provides a tread vulcanizing tire mold, comprising: Base; A rigid inner mold is movably mounted on the base; the rigid inner mold is connected to a drive assembly that drives it to contract or expand radially. The upper cover is located above the base and is movable in the vertical direction; The outer mold includes a patterned block, the inner wall of which is provided with a patterned surface; the upper cover can move the patterned block by moving in a vertical direction. A positioning ring is disposed on the base and / or the upper cover; the positioning ring has a first positioning surface, a second positioning surface and a working surface. The tire mold has a closed mold state and an open mold state; in the closed mold state, the rigid inner mold abuts against the first positioning surface, the tread block abuts against the second positioning surface, and at least part of the outer peripheral surface of the rigid inner mold, the tread surface and the working surface together form a closed vulcanization cavity; in the open mold state, both the rigid inner mold and the tread block are separated from the positioning ring.

[0007] As a preferred technical solution, the driving component includes a central mechanism, and a connecting member is provided between the rigid inner mold and the central mechanism. When the central mechanism moves in the vertical direction, it can drive the rigid inner mold to radially contract or expand through the connecting member.

[0008] As a preferred technical solution, the rigid inner mold includes a plurality of first inner modules and a plurality of second inner modules, which are staggered in the circumferential direction to form the rigid inner mold; the connecting member includes a first connecting member connecting the first inner modules to the central mechanism and a second connecting member connecting the second inner modules to the central mechanism. During the process in which the central mechanism drives the rigid inner mold to contract radially through the connecting member, the second inner module moves radially inward before the first inner module.

[0009] As a preferred technical solution, the base is provided with radially arranged tracks corresponding to both the first inner module and the second inner module, and both the first inner module and the second inner module move along the tracks.

[0010] As a preferred technical solution, the inner circumferential surface of the rigid inner mold is provided with a first conical surface, the central mechanism is provided with a conical seat, and the outer circumferential surface of the conical seat is provided with a second conical surface; when the mold is closed, the second conical surface abuts against the first conical surface, and the conical seat causes the rigid inner mold to have a radial expansion tendency.

[0011] As a preferred technical solution, it also includes a guide ring, the patterned block is slidably engaged with the guide ring, and the upper end of the patterned block is slidably connected to the upper cover.

[0012] As a preferred technical solution, the base includes an outer ring and an inner ring disposed within the outer ring; the rigid inner mold is movably disposed on the inner ring; during mold closing, the patterned block abuts against the outer ring.

[0013] As a preferred technical solution, the first positioning surface and the second positioning surface are respectively located on both sides of the working surface; And / or, the positioning ring is fixedly connected to the base and / or the top cover by bolts.

[0014] As a preferred technical solution, a pressure-applying component is provided on the upper end face of the cone seat, and a through hole is provided on the upper cover corresponding to the position of the pressure-applying component.

[0015] As a preferred technical solution, the upper cover is connected to a movable mold mechanism, which can drive the upper cover to move in the vertical direction.

[0016] The beneficial effects of this invention are as follows: The base and / or top cover of the present invention are fixedly provided with positioning rings. During mold closing, the rigid inner mold and the outer mold are positioned respectively with the first positioning surface and the second positioning surface of the positioning ring as references. At the same time, the positioning accuracy of the rigid inner mold and the outer mold is guaranteed, avoiding the problem of insufficient mold closing accuracy caused by the rigid inner mold and the outer mold squeezing each other during mold closing, thereby improving the dimensional accuracy and vulcanization quality of the tire. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a tread vulcanizing tire mold according to the present invention; Figure 2 for Figure 1 Enlarged view of region A in the middle; Figure 3 for Figure 1 Enlarged view of region B in the middle; Figure 4 for Figure 1 A schematic diagram of the tire mold during mold opening.

[0018] In the diagram: 1-base, 11-outer ring, 12-inner ring, 2-rigid inner mold, 21-central mechanism, 211-upper ring, 212-lower ring, 22-connector, 23-first conical surface, 24-conical seat, 241-second conical surface, 3-upper cover, 31-through hole, 4-patterned block, 5-positioning ring, 51-first positioning surface, 52-second positioning surface, 53-working surface, 6-vulcanizing cavity, 61-overflow groove, 7-guide ring, 8-pressurizing assembly, 81-pressurizing block, 82-elastic element, 9-slider, C-upper heating plate. Detailed Implementation

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0020] Please refer to Figures 1-4This invention provides an embodiment of a tread vulcanizing tire mold, comprising a rigid inner mold 2 and an outer mold; the rigid inner mold 2 includes multiple inner modules distributed circumferentially, each movably mounted on a base 1; the rigid inner mold 2 is connected to a drive assembly that drives its radial contraction or expansion to realize the opening and closing of the rigid inner mold 2; when the rigid inner mold 2 contracts, the multiple inner modules move to a first radial position, and the rigid inner mold 2 is in an open state, allowing the tire blank to be easily installed onto the rigid inner mold 2; when the rigid inner mold 2 expands, the multiple inner modules move to a second radial position and abut against each other circumferentially and splice into a ring, and the rigid inner mold 2 is in a closed state, allowing the tire blank to be opened.

[0021] The outer mold includes multiple circumferentially arranged tread blocks 4, and the inner wall surface of the tread blocks 4 is provided with a tread surface. The tread vulcanizing tire mold also includes an upper cover 3 and a guide ring 7, which are located above the base 1. The upper end of the tread block 4 is slidably engaged with the upper cover 3, and the back of the tread block 4 is slidably engaged with the inner wall of the guide ring 7. The relative vertical movement of the upper cover 3 and the guide ring 7 can drive the multiple tread blocks 4 to move radially to realize the opening and closing of the outer mold. Specifically, a slider 9 is fixedly connected to the upper end of the tread block 4. The slider 9 is slidably arranged in the groove of the upper cover 3 and can move radially relative to the upper cover 3. The slider 9 can be a T-shaped block, and the groove is correspondingly a T-shaped groove. The back of the tread block 4 and the inner wall of the guide ring 7 can be mutually engaged conical surfaces, and the two can be guided by the setting of guide strips and guide grooves. Further, the tread block 4 includes a body and an arc-shaped seat. The body is fixedly connected to the inner side of the arc-shaped seat, and the outer wall of the arc-shaped seat is slidably engaged with the inner wall of the guide ring 7. When the multiple tread blocks 4 move radially to the third radial position, the outer mold is in the open state, and the tread surface of the tread blocks 4 is separated from the outer surface of the tire blank. When the multiple tread blocks 4 move radially to the fourth radial position, the outer mold is in the closed state, and the tread surface of the tread blocks 4 presses against the outer surface of the tire blank. After both the rigid inner mold 2 and the outer mold are closed, the tire blank is accommodated inside the vulcanizing cavity 6 defined by the outer mold and the rigid inner mold 2, which facilitates the subsequent vulcanizing process. In the radial direction, the third radial position, the fourth radial position, the second radial position, and the first radial position are arranged sequentially at intervals. A positioning ring 5 is disposed on the base 1 and / or the upper cover 3; the positioning ring 5 has a first positioning surface 51, a second positioning surface 52, and a working surface 53; the inner sidewall of the positioning ring 5 at least partially forms the first positioning surface 51, the outer sidewall of the positioning ring 5 at least partially forms the second positioning surface 52, and the end face of the positioning ring 52 near the vulcanizing cavity 6 at least partially forms the working surface 53; the tire mold has a closed mold state and a closed mold state; when the mold is closed, multiple inner modules of the rigid inner mold 2 move to the second radial position, and the rigid inner mold 2 When the tread block 4 abuts against the first positioning surface 51, it moves to the fourth radial position and abuts against the second positioning surface 52. The positioning ring 5 precisely positions the rigid inner mold 2 and the tread block 4. At least part of the outer peripheral surface, tread surface and working surface 53 of the rigid inner mold 2 together form a closed vulcanizing cavity 6. When the mold is opened, the rigid inner mold 2 moves to the first radial position and the tread block 4 moves to the third radial position. Both the rigid inner mold 2 and the tread block 4 are separated from the positioning ring 5, which makes it easy to remove the vulcanized tire and install a new tire blank.

[0022] Preferably, please refer to Figure 1 and Figure 4 Positioning rings 5 ​​should be fixedly installed on both the base 1 and the top cover 3 to position the outer mold and the rigid inner mold 2 from the top and bottom ends respectively, thereby improving the positioning accuracy and stability.

[0023] In this embodiment, a positioning ring 5 is fixedly installed on the base 1 and / or the top cover 3. The rigid inner mold 2 and the outer mold are positioned using the first positioning surface 51 and the second positioning surface 52 of the positioning ring 5 as references, ensuring the positioning accuracy of the rigid inner mold 2 and the outer mold. This avoids the problem of insufficient mold closing accuracy caused by mutual compression when the rigid inner mold 2 and the outer mold are closed, thus improving the dimensional accuracy and vulcanization quality of the tire. Furthermore, the working surface 53 of the positioning ring 5 can also provide support and preliminary positioning for the tire blank when it is placed, avoiding damage to the tire blank caused by compression due to problems such as tire blank tilting or inaccurate positioning.

[0024] It should be noted that the radial and circumferential directions in this invention are based on the axis of the tire mold.

[0025] Specifically, please refer to Figures 1-3 The first positioning surface 51 and the second positioning surface 52 are located on both sides of the working surface 53, respectively. When the mold is closed, the positioning ring 5 is embedded between the rigid inner mold 2 and the patterned block 4, and the force on the positioning ring 5 can cancel each other out. Furthermore, the positioning ring 5 is preferably fixedly connected to the base 1 and the upper cover 3 by bolts, which facilitates installation and replacement. In order to avoid wear on the patterned block 4 and the rigid inner mold 2, the hardness of the positioning ring 5 should be lower than that of the patterned block 4 and the rigid inner mold 2, so that the wear occurs on the positioning ring 5. For example, the rigid inner mold 2 and the patterned block 4 can be made of carbon steel, and the positioning ring 5 can be made of aluminum alloy.

[0026] Furthermore, the guide ring 7 is fixedly connected to the upper hot plate C, the upper hot plate C is fixed to the moving crossbeam (not shown) of the vulcanizing machine, the base 1 is fixedly connected to the lower hot plate, the lower hot plate is fixedly connected to the base of the vulcanizing machine, and the moving crossbeam is also equipped with a movable mold mechanism (such as a hydraulic cylinder, a pneumatic cylinder, etc.). The upper cover 3 is connected to the power output end of the movable mold mechanism (not shown), and the movable mold mechanism (such as a hydraulic cylinder, a pneumatic cylinder, etc.) drives the upper cover 3 to move relative to the guide ring 7 in the vertical direction.

[0027] When the outer mold opens, the upper heating plate C drives the guide ring 7 to rise, and the movable mold mechanism keeps the upper cover 3 stationary. Due to the engagement between the inner wall of the guide ring 7 and the conical surface on the back of the patterned block 4, multiple patterned blocks 4 move radially from the fourth radial position to the third radial position. Then, the moving beam can drive the upper heating plate C, the outer mold, the upper cover 3, the guide ring 7, etc., to rise together to the preset position. When the outer mold closes, the upper beam drives the upper heating plate C, the outer mold, the upper cover 3, the guide ring 7, etc., to descend together until the lower end of the patterned block 4 abuts against the base 1. The upper heating plate C continues to descend, and the movable mold mechanism keeps the upper cover 3 stationary. Due to the engagement between the inner wall of the guide ring 7 and the conical surface on the back of the patterned block 4, multiple patterned blocks 4 move radially from the third radial position to the fourth radial position.

[0028] In this embodiment, please refer to Figure 1 and Figure 4The driving component includes a central mechanism 21, and a connecting member 22 is provided between the rigid inner mold 2 and the central mechanism 21. When the central mechanism 21 moves in the vertical direction, it can drive the rigid inner mold 2 to contract or expand radially through the connecting member 22.

[0029] It should be noted that the rigid inner mold 2 should include several first inner modules and several second inner modules, which are staggered in the circumferential direction to form the rigid inner mold 2; the connecting member 22 includes a first connecting member connecting the first inner modules to the central mechanism 21 and a second connecting member connecting the second inner modules to the central mechanism 21. During the process of the central mechanism 21 driving the rigid inner mold 2 to radially contract through the connecting member 22, the second inner modules move radially inward before the first inner modules; specifically, the circumferential side walls of the second inner module 24 gradually contract in the radially outward direction, and correspondingly, the circumferential side walls of the first inner module 23 gradually expand in the radially outward direction, which can avoid interference between the two when they move radially relative to each other; furthermore, the first connecting member and the second connecting member can be designed as a connecting rod. The connecting rods are designed with elongated holes of different lengths. A pin is installed on the inner module, located within the elongated hole. The length of the elongated hole in the first connector is greater than that in the second connector. When the central mechanism 21 moves vertically, the first and second inner modules experience different travel distances, thus achieving sequential radial movement of the second and first inner modules. Alternatively, the first and second connectors may include springs with different elastic coefficients or wedge structures with different inclination angles, similarly achieving sequential radial movement of the second and first inner modules. The specific structures of the first and second inner modules, the first and second connectors, and the principle of their mutual cooperation to achieve radial expansion or contraction of the rigid inner mold 2 are all existing technologies and will not be elaborated upon here. Furthermore, to ensure smooth radial movement of the rigid inner mold 2 relative to the base 1, the base 1 is provided with radially arranged tracks corresponding to both the first and second inner modules, and both the first and second inner modules move along these tracks.

[0030] Based on the foregoing embodiments, please refer to Figure 1 and Figure 4 The rigid inner mold 2 has a first conical surface 23 on its inner circumferential surface, and a conical seat 24 on the central mechanism 21. The outer circumferential surface of the conical seat 24 has a second conical surface 241. When the mold is closed, the second conical surface 241 abuts against the first conical surface 23. The conical seat 24 causes the rigid inner mold 2 to have a radial expansion tendency. The central mechanism 21 moves downward to cause the rigid inner mold 2 to expand radially, thereby applying a mold closing force to the inner mold.

[0031] Furthermore, the central mechanism 21 includes an upper ring 211 and a lower ring 212. The upper ring 211 is located at the top of the central mechanism 21. The upper ring 211 and the lower ring 212 can move up and down respectively. Specifically, an upper ring drive mechanism and a lower ring drive mechanism can be set respectively, such as a cylinder or a hydraulic cylinder. The cone seat 24 is fixedly connected to the upper ring 211. The first inner module is connected to the lower ring 212 through a first connector, and the second inner module is connected to the lower ring 212 through a second connector.

[0032] In practical use, please refer to Figure 3 The base 1 preferably includes an outer ring 11 and an inner ring 12 disposed within the outer ring 11; the rigid inner mold 2 is movably disposed on the inner ring 12, and the positioning ring 5 is disposed at the inner edge of the outer ring 11. When the mold is closed, the patterned block 4 abuts against the outer ring 11, making the overall installation of the rigid inner mold 2 more convenient and also making it easier to remove the whole mold from the outer mold for maintenance.

[0033] Please refer to the following for clarification: Figures 1-3 Since the vulcanizing cavity 6 formed by the rigid inner mold 2, the tread block 4 and the positioning ring 5 is fixed, in order to ensure that the quality of tires of the same specification does not vary, when the mold is closed, the tread block 4 and the positioning ring 5 form an overflow groove 61 that communicates with the vulcanizing cavity 6.

[0034] Furthermore, please refer to Figure 1 , Figure 2 and Figure 4 A pressure-applying component 8 is provided at the upper end face of the cone seat 24. A through hole 31 is provided on the upper cover 3 corresponding to the position of the pressure-applying component 8. During the mold closing process, when the upper cover 3 reaches the mold closing height, the upper end of the pressure-applying component 8 protrudes beyond the upper cover 3. Then, the upper heating plate C applies pressure to the guide ring 7 and the pressure-applying component 8 during its descent, thereby applying a mold closing force to the mold. Preferably, after the mold is closed, the upper end of the pressure-applying component 8 is flush with the upper cover 3.

[0035] Multiple pressurizing components 8 are arranged circumferentially, and the pressurizing components 8 can be support blocks, support columns, etc. Preferably, the pressurizing component 8 includes a pressurizing block 81 and an elastic element 82. The elastic element 82 is located between the pressurizing block 81 and the cone seat 24. The upper end of the elastic element 82 abuts against the pressurizing block 81, and the lower end of the elastic element 82 abuts against the upper end face of the cone seat 24. The upper cover 3 is provided with a through hole 31 corresponding to the pressurizing block 81. When the mold is closed, the pressurizing block 81 can pass through the through hole 31. During the mold closing process, the upper hot plate C of the vulcanizing machine presses down to apply downward pressure to the pressurizing block 81 and compress the elastic element 82. The elastic force generated by the elastic element 82 is transmitted to the rigid inner mold 2 through the cone seat 24 to form the inner mold closing force. This ensures that during the vulcanization process, the cone seat 24 applies a sufficiently large closing force to the rigid inner mold 2, avoiding displacement of the rigid inner mold 2 due to its own weight or rubber expansion, which would affect the concentricity of the tire and cause uneven tire wall thickness. Specifically, the elastic element 82 is preferably set as a disc spring.

[0036] This application discloses a tire vulcanizing mold. During the mold closing process, the upper heating plate C descends and applies a closing force to the outer mold through the sliding engagement of the guide ring 7 and the tread block 4. Simultaneously, the upper heating plate C applies a closing force to the rigid inner mold 2 through the pressure assembly. This achieves simultaneous application of closing forces to both the outer mold and the rigid inner mold 2. Combined with the precise positioning of the outer mold and the rigid inner mold 2 by the positioning ring 5, displacement of the tread block 4 and the inner mold 2 due to inaccurate positioning and rubber expansion during vulcanization is avoided, thus improving the tire vulcanization quality. Furthermore, by replacing different pressure assemblies 8 and adjusting the stroke of the upper heating plate C, the closing force between the outer mold and the rigid inner mold 2 can be adjusted to adapt to different vulcanization conditions and further improve the tire vulcanization quality.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tread vulcanizing tire mold, characterized in that, include: Base (1); A rigid inner mold (2) is movably disposed on the base (1); the rigid inner mold (2) is connected to a drive assembly that drives it to contract or expand radially. The upper cover (3) is located above the base (1) and is movable in the vertical direction; The outer mold includes a patterned block (4), and the inner wall of the patterned block (4) is provided with a patterned surface; the upper cover (3) can move the patterned block (4) by moving in the vertical direction; Positioning ring (5), the positioning ring (5) is disposed on the base (1) and / or the upper cover (3); the positioning ring (5) has a first positioning surface (51), a second positioning surface (52) and a working surface (53); The tire mold has a closed mold state and an open mold state; in the closed mold state, the rigid inner mold (2) abuts against the first positioning surface (51), the tread block (4) abuts against the second positioning surface (52), and at least part of the outer peripheral surface of the rigid inner mold (2), the tread surface and the working surface (53) together form a closed vulcanizing cavity (6); in the open mold state, the rigid inner mold (2) and the tread block (4) are separated from the positioning ring (5).

2. The tire tread vulcanizing mold according to claim 1, characterized in that, The driving component includes a central mechanism (21), and a connecting member (22) is provided between the rigid inner mold (2) and the central mechanism (21). When the central mechanism (21) moves in the vertical direction, it can drive the rigid inner mold (2) to radially contract or expand through the connecting member (22).

3. The tire tread vulcanizing mold according to claim 2, characterized in that, The rigid inner mold (2) includes a plurality of first inner modules and a plurality of second inner modules, which are staggered in the circumferential direction to form the rigid inner mold (2); the connecting member (22) includes a first connecting member that connects the first inner module to the central mechanism (21) and a second connecting member that connects the second inner module to the central mechanism (21). During the process in which the central mechanism (21) drives the rigid inner mold (2) to radially contract through the connecting member (22), the second inner module moves radially inward before the first inner module.

4. The tire tread vulcanizing mold according to claim 3, characterized in that, The base (1) is provided with radially arranged tracks corresponding to the first inner module and the second inner module, and the first inner module and the second inner module move along the tracks.

5. A tire tread vulcanizing mold according to claim 2, characterized in that, The rigid inner mold (2) has a first conical surface (23) on its inner circumferential surface, and the central mechanism (21) has a conical seat (24). The outer circumferential surface of the conical seat (24) has a second conical surface (241). When the mold is closed, the second conical surface (241) abuts against the first conical surface (23), and the conical seat (24) causes the rigid inner mold (2) to have a radial expansion tendency.

6. The tire tread vulcanizing mold according to claim 1, characterized in that, It also includes a guide ring (7), the patterned block (4) is slidably engaged with the guide ring (7), and the upper end of the patterned block (4) is slidably connected to the upper cover (3).

7. A tire tread vulcanizing mold according to claim 6, characterized in that, The base (1) includes an outer ring (11) and an inner ring (12) disposed within the outer ring (11); the rigid inner mold (2) is movably disposed on the inner ring (12); when the mold is closed, the patterned block (4) abuts against the outer ring (11).

8. A tire tread vulcanizing mold according to claim 1, characterized in that, The first positioning surface (51) and the second positioning surface (52) are located on both sides of the working surface (53); And / or, the positioning ring (5) is fixedly connected to the base (1) and / or the top cover (3) by bolts.

9. A tire tread vulcanizing mold according to claim 5, characterized in that, The upper end face of the cone seat (24) is provided with a pressure assembly (8), and the upper cover (3) is provided with a through hole (31) at the position corresponding to the pressure assembly (8).

10. A tire tread vulcanizing mold according to claim 1, characterized in that, The upper cover (3) is connected to a movable mold mechanism, which can drive the upper cover (3) to move in the vertical direction.

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