Tire vulcanizing mold

Abstract

The utility model is applicable to the technical field of vulcanizing molds, and provides a tire vulcanizing mold, which comprises a lower mold, a pressing mechanism is arranged above the lower mold, and an upper mold consisting of a plurality of movable modules is movably connected in the pressing mechanism. The top of the movable module penetrates to the position above the downward pressing mechanism and is provided with a sliding mechanism. A tire cavity is formed between the movable modules and the lower mold in the butt joint state, a vulcanization liner is arranged in the center of the top end of the lower mold, and the vulcanization liner and an upper mold composed of the multiple movable modules are used for vulcanizing a tire. According to the utility model, the sliding mechanism is arranged, and the tension spring is arranged outside the lower gland, so that the tension spring can be directly replaced when the movable wood block cannot be well synchronized due to metal fatigue of the tension spring, and the device does not need to be disassembled.

Description

Technical Field

[0001] The utility model belongs to the technical field of tire vulcanization, and particularly relates to a tire vulcanization mold. Background Technique

[0002] The process of transforming linear macromolecules into a three-dimensional network structure under certain temperature and pressure conditions is called vulcanization because sulfur was originally used to crosslink natural rubber, which changes the tire from a soft state without elasticity to a harder state with elasticity.

[0003] In existing vulcanization molds, the synchronous movement of multiple movable modules generally relies on a linkage mechanism (such as a multi-link telescopic mechanism). A return spring is installed inside the linkage mechanism. When the linkage mechanism is under pressure, it synchronously pushes multiple movable modules to move synchronously. However, as the usage time of the spring increases, metal fatigue occurs, resulting in the movement of the movable modules not being completely consistent. At this time, the spring needs to be replaced, and replacing the spring located inside the device requires disassembling the device, which is inefficient. Summary of the Utility Model

[0004] The utility model provides a tire vulcanization mold, aiming to solve the problems mentioned in the above background technique.

[0005] The utility model is realized as follows. A tire vulcanization mold includes a lower mold. An upper pressing mechanism is arranged above the lower mold. An upper mold composed of multiple movable modules is movably connected inside the upper pressing mechanism. The top of the movable module penetrates above the upper pressing mechanism and is provided with a sliding mechanism. A tire cavity is formed between the movable module in the docking state and the lower mold. A vulcanization bladder is arranged at the center of the top end of the lower mold. The vulcanization bladder and the upper mold composed of multiple movable modules vulcanize the tire. The upper pressing mechanism is used to squeeze multiple movable modules to move synchronously inward to form a seamless upper mold. The sliding mechanism is used to drive multiple movable modules to move synchronously outward to cancel the limit on the vulcanized tire.

[0006] Preferably, the upper pressing mechanism includes a hydraulic cylinder, a pressure cover, and an extrusion surface.

[0007] Specifically: the output end of the hydraulic cylinder is connected to the pressure cover. The pressure cover is of a hollow structure, and the bottom end of the pressure cover is in an open state. An extrusion surface is formed on the inner wall of the pressure cover, and the extrusion surface is in a trumpet-shaped structure with a smaller upper part and a larger lower part.

[0008] Preferably, the sliding mechanism includes a strip-shaped groove, a movable column, a fixed column, and a tension spring.

[0009] Specifically, it includes: a strip-shaped groove formed on the top plate of the pressure cover, the number of strip-shaped grooves being equal to the number of movable modules; a movable column is welded to the top of the movable module, the movable column extends upward through the strip-shaped groove, and a fixed column is welded to the top of the pressure cover outside the strip-shaped groove; a tension spring is connected between the fixed column and the movable column on the same axis, and hook portions are formed at both ends of the tension spring, and the two hook portions are respectively hooked to the outer walls of the fixed column and the movable column.

[0010] Preferably, a first anti-disengagement portion is formed at the top of the fixed column by cold pressing, and a second anti-disengagement portion is formed at the top of the movable column by cold pressing.

[0011] Preferably, a pressure-receiving surface is formed on the outer periphery of the movable module, and the outer wall of the pressure-receiving surface fits with the inner wall of the extrusion surface.

[0012] Preferably, the height of the movable column is higher than the height of the strip-shaped groove.

[0013] Preferably, a connection hole is provided at the inner center of the vulcanization bladder and the lower mold, and the connection hole is connected to a pump body through a pipeline, and the pump body is used to input high-temperature liquid into the vulcanization bladder.

[0014] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0015] By setting a sliding mechanism in the present utility model and placing the tension spring outside the lower pressure cover, when the tension spring undergoes metal fatigue and the movable wooden blocks cannot synchronize well, the tension spring can be directly replaced without disassembling the device. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram provided by the present utility model;

[0017] Figure 2 is an internal structural diagram provided by the present utility model;

[0018] Figure 3 is provided by the present utility model Figure 2 Partial enlarged view of A in.

[0019] In the figure: 1, lower mold; 2, pressure cover; 3, strip-shaped groove; 4, fixed column; 5, first anti-disengagement portion; 6, movable column; 7, second anti-disengagement portion; 8, tension spring; 9, hydraulic cylinder; 10, movable module; 11, upper mold; 12, vulcanization bladder; 13, extrusion surface; 14, pressure-receiving surface. Detailed Embodiments

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0022] An embodiment of the present utility model provides a tire vulcanizing mold, as Figures 1-3 shown, which includes a lower mold 1. An upper pressing mechanism is arranged above the lower mold 1. An upper mold 11 composed of a plurality of movable modules 10 is movably connected inside the upper pressing mechanism. The top of the movable module 10 penetrates above the upper pressing mechanism and is provided with a sliding mechanism; a tire cavity is formed between the movable module 10 in the docking state and the lower mold 1. A vulcanizing bladder 12 is arranged at the center of the top end of the lower mold 1. The vulcanizing bladder 12 and the upper mold 11 composed of a plurality of movable modules 10 vulcanize the tire; the upper pressing mechanism is used to squeeze a plurality of movable modules 10 to move synchronously inward to form a seamless upper mold 11; the sliding mechanism is used to drive a plurality of movable modules 10 to move synchronously outward to cancel the limitation on the vulcanized tire.

[0023] In this embodiment: First, place the unvulcanized tire blank at the center of the lower mold 1, and then start the upper pressing mechanism. During the movement of the upper pressing mechanism, the bottom of a plurality of movable modules 10 is driven to contact the top surface of the lower mold 1. At this time, the movable module 10 cannot continue to move downward, and the continuously descending upper pressing mechanism squeezes the outer walls of a plurality of movable modules 10.

[0024] At this time, a plurality of movable modules 10 are forced to move synchronously inward until the bottom end of the upper pressing mechanism also contacts the top end of the lower mold 1. At this time, a plurality of movable modules 10 form a complete upper mold 11, and the lower mold 1 and the upper mold 11 limit the outer wall of the tire blank.

[0025] In a further preferred embodiment of the present utility model, as Figures 1-3As shown, the pressing-down mechanism includes a hydraulic cylinder 9. The output end of the hydraulic cylinder 9 is connected with a pressure cover 2. The pressure cover 2 is of a hollow structure, and the bottom end of the pressure cover 2 is in an open state. An extrusion surface 13 is formed on the inner wall of the pressure cover 2. The extrusion surface 13 is in a horn-shaped structure with a smaller upper part and a larger lower part.

[0026] In this embodiment, when the hydraulic cylinder 9 is started, the hydraulic cylinder 9 extends to drive the pressure cover 2 to move downward. The downward-moving pressure cover 2 drives a plurality of movable modules 10 to move downward synchronously until the bottom ends of the movable modules 10 contact the top end of the lower die 1. At this time, the plurality of movable modules 10 have no space to move downward. Then the pressure cover 2 continues to move downward. The inner wall of the pressure cover 2 presses the outer walls of the plurality of movable modules 10. The plurality of movable modules 10 under the extrusion force move inward synchronously until the bottom end of the pressure cover 2 contacts the top end of the lower die 1. At this time, the plurality of movable modules 10 form a complete upper die 11.

[0027] In a further preferred embodiment of the present utility model, as Figures 1-3 shown, the sliding mechanism includes a strip-shaped groove 3 formed on the top plate of the pressure cover 2. The number of the strip-shaped grooves 3 is equal to the number of the movable modules 10. A movable column 6 is welded to the top end of the movable module 10. The movable column 6 penetrates upward above the strip-shaped groove 3. A fixed column 4 is welded on the top of the pressure cover 2 outside the strip-shaped groove 3. A tension spring 8 is connected between the fixed column 4 and the movable column 6 on the same axis. Hook parts are formed at both ends of the tension spring 8, and the two hook parts are hooked to the outer walls of the fixed column 4 and the movable column 6 respectively.

[0028] In this embodiment, when the plurality of movable modules 10 move under the extrusion force, the movable modules 10 drive the movable columns 6 at their tops to axially move along the strip-shaped groove 3. At this time, the movable columns 6 pull the tension spring 8 to extend, while the other end of the tension spring 8 remains in the initial position;

[0029] When the vulcanization of the tire is completed, the pressing-down mechanism moves upward at this time. At this time, the pressure on the outer walls of the movable modules 10 gradually decreases until it disappears. At this time, the tension spring 8 resets. The tension spring 8 pulls the movable columns 6 to reset along the strip-shaped groove 3, and the movable columns 6 synchronously drive the movable modules 10 connected thereto to reset outward.

[0030] In a further preferred embodiment of the present utility model, as Figures 1-3 shown, a first anti-disengagement part 5 is formed at the top end of the fixed column 4 by cold pressing, and a second anti-disengagement part 7 is formed at the top end of the movable column 6 by cold pressing.

[0031] In this embodiment, since the diameter of the first anti-disengagement part 5 is larger than the diameter of the fixed column 4, and the diameter of the second anti-disengagement part 7 is larger than the diameter of the movable column 6, the first anti-disengagement part 5 and the second anti-disengagement part 7 can effectively prevent the tension spring 8 from disengaging from the fixed column 4 and the movable column 6.

[0032] In a further preferred embodiment of the present utility model, asFigures 1-3 As shown, a pressure surface 14 is formed on the outer periphery of the movable module 10 , and the outer wall of the pressure surface 14 is consistent with the inner wall of the extrusion surface 13 .

[0033] In this embodiment, when the pressure cover 2 moves downward, the pressure cover 2 presses the pressure surface 14 through the extrusion surface 13 , and the pressure surface 14 under pressure drives the movable module 10 to move.

[0034] In a further preferred embodiment of the present invention, Figures 1-3 As shown, the height of the movable column 6 is higher than the height of the strip groove 3 .

[0035] In this embodiment, during the upward movement of the pressure cover 2 , when the pressure cover 2 contacts the bottom end of the second anti-detachment portion 7 , the pressure cover 2 drives the movable module 10 to move upward through the second anti-detachment portion 7 .

[0036] In a further preferred embodiment of the present invention, Figures 1-3 As shown, a connecting hole is opened at the inner center of the vulcanization bladder 12 and the lower mold 1. The connecting hole is connected to a pump body through a pipeline. The pump body is used to input high-temperature liquid into the vulcanization bladder 12.

[0037] In this embodiment, high-temperature liquid or high-temperature steam is transported to the vulcanization bladder 12 through a pump body, and the internal pressure of the vulcanization bladder 12 increases. Since the vulcanization bladder 12 is made of rubber material, the vulcanization bladder 12 expands and contacts the tire blank. The high temperature is transferred to the tire blank through the vulcanization bladder 12, thereby achieving the purpose of vulcanization of the tire blank.

[0038] It should be noted that for the aforementioned embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0039] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the division of the above-mentioned units. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or communication connection between each other shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0040] The units described above as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or may be distributed over multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without creative efforts, combine, add or delete the features in the embodiments of the present invention according to the situation or make other adjustments, so as to obtain different technical solutions that are essentially not divorced from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A tire vulcanization mold, including a lower mold (1), characterized in that, Above the lower mold (1), a downward pressing mechanism is provided. Inside the downward pressing mechanism, an upper mold (11) composed of multiple movable modules (10) is movably connected. The top of the movable module (10) penetrates above the downward pressing mechanism and is provided with a sliding mechanism. A tire cavity is formed between the movable module (10) in the docking state and the lower mold (1). At the center of the top end of the lower mold (1), a vulcanization bladder (12) is provided. The vulcanization bladder (12) and the upper mold (11) composed of multiple movable modules (10) vulcanize the tire. The downward pressing mechanism is used to squeeze multiple movable modules (10) to move synchronously inward to form a seamless upper mold (11). The sliding mechanism is used to drive multiple movable modules (10) to move synchronously outward to cancel the limit on the vulcanized tire. The downward pressing mechanism includes a hydraulic cylinder (9). The output end of the hydraulic cylinder (9) is connected to a pressure cover (2). The pressure cover (2) is of a hollow structure, and the bottom end of the pressure cover (2) is in an open state. An extrusion surface (13) is formed on the inner wall of the pressure cover (2). The extrusion surface (13) is in a horn-shaped structure with a smaller upper part and a larger lower part. The sliding mechanism includes a strip-shaped groove (3) opened on the top plate of the pressure cover (2). The number of the strip-shaped grooves (3) is equal to the number of the movable modules (10). An activity column (6) is welded to the top end of the movable module (10). The activity column (6) penetrates upward above the strip-shaped groove (3). A fixed column (4) is welded to the top of the pressure cover (2) outside the strip-shaped groove (3). A tension spring (8) is connected between the fixed column (4) and the activity column (6) on the same axis. Both ends of the tension spring (8) are formed with hook parts, and the two hook parts are hooked to the outer walls of the fixed column (4) and the activity column (6) respectively.

2. The tire vulcanizing mold according to claim 1, wherein, A first anti-disengagement part (5) is formed at the top end of the fixed column (4) by cold pressing. A second anti-disengagement part (7) is formed at the top end of the activity column (6) by cold pressing.

3. A tire vulcanizing mold according to claim 2, characterized in that, A pressure-receiving surface (14) is formed on the outer periphery of the movable module (10). The outer wall of the pressure-receiving surface (14) coincides with the inner wall of the extrusion surface (13).

4. A tire vulcanization mold according to claim 3, characterized in that, The height of the activity column (6) is higher than the height of the strip-shaped groove (3).

5. The tire vulcanizing mold according to claim 4, characterized in that, A connection hole is opened at the center of the interior of the vulcanization bladder (12) and the lower mold (1). The connection hole is connected to a pump body through a pipeline. The pump body is used to input high-temperature liquid into the vulcanization bladder (12).

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