Vacuum vulcanizing mold and vulcanizing machine for vulcanizing tires

Abstract

The utility model provides a vacuum vulcanizing mould for vulcanizing a tire and a vulcanizing machine, the vacuum vulcanizing mould for vulcanizing the tire comprises an upper half mould, a lower half mould, an upper mould sealing cover and a lower mould sealing cover, the upper half mould and the lower half mould are butted and matched, and a vulcanizing cavity is formed between the upper half mould and the lower half mould; the upper mold sealing cover is connected with the upper half mold and covers the upper half mold; the lower mold sealing cover is connected with the lower half mold in a sealing manner, the lower mold sealing cover is arranged below the lower half mold, the upper mold sealing cover is connected with the lower mold sealing cover in a sealing manner, the upper mold sealing cover and / or the lower mold sealing cover are / is provided with a vacuumizing hole, and the vacuumizing hole is communicated with the vulcanization cavity and the outside of the vacuum vulcanization mold. The utility model solves the problem in the prior art that a large amount of rubber hair is easy to appear in the tire vulcanization process.

Description

Technical Field

[0001] This utility model relates to the field of tire vulcanization, and more specifically, to a vacuum vulcanization mold and vulcanizing machine for vulcanizing tires. Background Technology

[0002] In the tire manufacturing process, the vulcanization process is the last and most important step in tire forming, which has a significant impact on the tire's appearance quality. Currently, most tire vulcanization is the ordinary open vulcanization process. During the vulcanization process, a large amount of gas needs to be expelled. Therefore, many pores are processed on the mold to expel excess gas during the vulcanization process. In the ordinary open vulcanization process, the appearance of the vulcanized tire will have a lot of rubber hairs. These rubber hairs need to be removed manually afterward, otherwise it will greatly affect the tire's appearance. The removal work is not only labor-intensive and demanding, but the tire's appearance quality can also be affected by inconsistent removal of rubber hairs. Utility Model Content

[0003] The main purpose of this invention is to provide a vacuum vulcanizing mold and vulcanizing machine for vulcanizing tires, so as to solve the problem of a large amount of rubber fibers easily appearing during the existing tire vulcanization process.

[0004] To achieve the above objectives, according to one aspect of the present invention, a vacuum vulcanizing mold for vulcanizing tires is provided, comprising an upper mold half, a lower mold half, an upper mold sealing cover, and a lower mold sealing cover. The upper mold half and the lower mold half are mated together, forming a vulcanizing cavity between them. The upper mold sealing cover is connected to the upper mold half and covers the upper mold half. The lower mold sealing cover is sealed to the lower mold half and is located below the lower mold half. The upper mold sealing cover and the lower mold sealing cover are sealed to each other. The upper mold sealing cover and / or the lower mold sealing cover have a vacuum hole that connects to the vulcanizing cavity and the outside of the vacuum vulcanizing mold.

[0005] Furthermore, the upper mold sealing cover has a downwardly extending annular protrusion, and the lower mold sealing cover has a downwardly recessed annular recess. When the upper mold sealing cover and the lower mold sealing cover are mated together, at least part of the annular protrusion is located within the annular recess.

[0006] Furthermore, the vacuum vulcanizing mold for vulcanizing tires also includes a first seal, which is disposed between the outer peripheral side of the annular protrusion and the inner peripheral side of the annular recess, and the upper mold sealing cover and the lower mold sealing cover are sealed and connected by the first seal.

[0007] Furthermore, an annular groove is provided on the outer peripheral side of the annular protrusion and / or the inner peripheral side of the annular recess, and the first seal is disposed in the annular groove.

[0008] Furthermore, the vacuum vulcanizing mold for vulcanized tires also includes an upper steel ring and a lower steel ring. The upper steel ring is connected to the upper mold half and is located on the inner circumference of the upper mold half. The lower steel ring is sealed to the lower mold half and is located on the inner circumference of the lower mold half.

[0009] Furthermore, the vacuum vulcanizing mold for vulcanizing tires also includes a second seal disposed between the lower steel ring and the lower mold half.

[0010] Furthermore, the vacuum vulcanizing mold for vulcanizing tires also includes a third seal, which is disposed between the lower mold half and the lower mold sealing cover.

[0011] Furthermore, the vacuum vulcanizing mold for vulcanizing tires also includes a vacuum pump, which is connected to a vacuum extraction port and can evacuate the vulcanizing chamber after the upper mold sealing cover and the lower mold sealing cover are mated together.

[0012] Furthermore, the vacuum vulcanizing mold for vulcanizing tires also includes multiple fasteners, with the upper mold half and the upper mold sealing cap, as well as the lower mold half and the lower mold sealing cap, connected by fasteners.

[0013] According to another aspect of the present invention, a vulcanizing machine is provided, including the above-described vacuum vulcanizing mold for vulcanizing tires.

[0014] By applying the technical solution of this utility model, a vulcanizing cavity is formed between the upper and lower mold halves through a docking arrangement, with the upper mold sealing cover positioned above the upper mold halves and the lower mold sealing cover positioned below the lower mold halves, and a vacuum hole is provided. This allows for the effective removal of gas from the vulcanizing cavity through the vacuum hole, making it a vacuum vulcanizing cavity. Therefore, it is unnecessary to provide venting holes on the cavity wall for tire venting, thus avoiding the problem of uneven or incomplete venting leading to excessive rubber fibers after tire vulcanization. This improves the tire's appearance quality, reduces the number of rubber fiber removal steps, and helps reduce labor intensity and increase work efficiency. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure of the vacuum vulcanizing mold of this utility model is shown.

[0017] The above figures include the following reference numerals:

[0018] 10. Upper mold half; 20. Lower mold half; 30. Upper mold sealing cover; 31. Annular protrusion; 40. Lower mold sealing cover; 41. Annular recess; 42. Vacuum hole; 50. First seal; 60. Upper steel ring; 70. Lower steel ring; 80. Second seal; 90. Third seal. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0021] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0022] To address the problem of excessive rubber fibers appearing during the existing tire vulcanization process, this invention provides a vacuum vulcanization mold and vulcanizing machine for vulcanizing tires, wherein the vulcanizing machine includes the vacuum vulcanization mold for vulcanizing tires described below.

[0023] like Figure 1 The vacuum vulcanizing mold for vulcanizing tires shown includes an upper mold 10, a lower mold 20, an upper mold sealing cover 30, and a lower mold sealing cover 40. The upper mold 10 and the lower mold 20 are mated together, forming a vulcanizing cavity between them. The upper mold sealing cover 30 is connected to the upper mold 10 and covers the upper mold 10. The lower mold sealing cover 40 is sealed to the lower mold 20 and is located below the lower mold 20. The upper mold sealing cover 30 and the lower mold sealing cover 40 are sealed to each other. The upper mold sealing cover 30 and / or the lower mold sealing cover 40 have a vacuum hole 42, which connects the vulcanizing cavity and the outside of the vacuum vulcanizing mold.

[0024] This embodiment establishes a vulcanizing cavity between the upper mold 10 and the lower mold 20 by setting an upper mold sealing cover 30 on top of the upper mold 10 and a lower mold sealing cover 40 below the lower mold 20, and by setting a vacuum hole 42. The vulcanizing cavity can be effectively vented through the vacuum hole 42, making it a vacuum vulcanizing cavity. This eliminates the need for venting holes on the cavity wall to vent the tire, thus avoiding the problem of uneven or incomplete venting that leads to a large amount of rubber hair after tire vulcanization. This improves the tire's appearance quality, reduces the number of rubber hair removal steps, reduces labor intensity, and increases work efficiency.

[0025] In this embodiment, the upper mold sealing cover 30 has a downwardly extending annular protrusion 31, and the lower mold sealing cover 40 has a downwardly recessed annular recess 41. When the upper mold sealing cover 30 and the lower mold sealing cover 40 are mated together, at least part of the annular protrusion 31 is located within the annular recess 41, thereby allowing the upper half mold 10 located below the upper mold sealing cover 30 and the lower half mold 20 located above the lower mold sealing cover 40 to mat together to form a sealed vulcanizing cavity. Specifically, in this embodiment, the upper mold sealing cover 30 is fixedly connected to the upper half mold 10. When the upper mold sealing cover 30 moves towards the lower mold sealing cover 40 under the drive of the vulcanizing machine drive device, it simultaneously drives the upper half mold 10 towards the lower half mold 20, thereby bringing the upper half mold 10 and the lower half mold 20 closer together to form a vulcanizing cavity. The mating of the annular protrusion 31 and the annular recess 41 makes the vulcanizing cavity a sealed vulcanizing cavity. The diameter of the outer periphery of the annular protrusion 31 is not greater than the diameter of the inner periphery of the annular recess 41, so that the annular protrusion 31 can extend into the annular recess 41. The lower mold sealing cover 40 is provided with an annular stepped structure on the side near the upper mold sealing cover 30. The inner periphery of the stepped structure naturally forms an annular recess 41. The two sidewalls of the annular recess 41 are the peripheral sidewall that mates with the annular protrusion 31 and the bottom sidewall that is away from the annular protrusion 31. When the annular protrusion 31 mates with the annular recess 41, if the distance by which the annular protrusion 31 extends into the annular recess 41 is too large, the bottom sidewall of the annular recess 41 can play a limiting role, thereby preventing the annular protrusion 31 from extending too far into the annular recess 41 and causing damage to the upper half mold 10 and the lower half mold 20 between the upper cover seal and the lower cover seal.

[0026] In this embodiment, the vacuum vulcanizing mold for vulcanizing tires further includes a first sealing element 50. The first sealing element 50 is disposed between the outer peripheral side of the annular protrusion 31 and the inner peripheral side of the annular recess 41. The upper mold sealing cover 30 and the lower mold sealing cover 40 are sealed together by the first sealing element 50, thereby further improving the sealing effect when the vulcanizing chamber is closed and ensuring the stability of the vacuum environment. Specifically, in this embodiment, the first sealing element 50 is configured as a sealing ring, which is sleeved on the outer peripheral side of the annular protrusion 31. When the annular protrusion 31 extends into the annular recess 41, it compresses the first sealing element 50, thereby sealing the connection between the upper cover sealing element and the lower cover sealing element.

[0027] In this embodiment, an annular groove is provided on the outer periphery of the annular protrusion 31 and / or the inner periphery of the annular recess 41. The first sealing element 50 is disposed within the annular groove, thereby improving the stability of the first sealing element 50 and preventing it from moving or being damaged due to high temperature and pressure during vulcanization, thus ensuring the sealing effect of the vulcanization chamber. Specifically, when the vulcanization chamber is closed, the first sealing element 50 is pressed tightly by the contact surfaces of the annular protrusion 31 and the annular recess 41, forming a tight sealing line, which effectively isolates external air and ensures the formation of a vacuum environment inside the vulcanization chamber. The design of the fit between the first sealing element 50 and the annular groove also considers the effects of thermal expansion and mechanical pressure, ensuring that under high temperature and high pressure vulcanization conditions, the first sealing element 50 will not lose its sealing effect due to expansion, nor will it be squeezed out of the annular groove due to excessive pressure, thus maintaining the integrity of its sealing function. Moreover, when the first seal 50 needs to be replaced and maintained, the first seal 50 can be easily removed from the annular groove for replacement without disassembling other parts of the vacuum vulcanizing mold, thereby simplifying the maintenance process and reducing maintenance costs.

[0028] In this embodiment, the vacuum vulcanizing mold for vulcanizing tires also includes an upper steel ring 60 and a lower steel ring 70. The upper steel ring 60 is connected to the upper mold half 10 and is located on the inner circumference of the upper mold half 10. The lower steel ring 70 is sealed to the lower mold half 20 and is located on the inner circumference of the lower mold half 20. Thus, the upper steel ring 60 and lower steel ring 70 provide better support and positioning for the tire, ensuring the accuracy of the tire's shape and dimensions during the vulcanization process. Specifically, both the upper steel ring 60 and lower steel ring 70 can be configured as annular structures to ensure that they fit tightly against the tire when the vacuum vulcanizing mold is closed, forming a good sealing effect. The connection between the upper steel ring 60 and lower steel ring 70 and the upper mold half 10 and lower mold half 20 typically uses high-strength bolts or special clips to ensure connection stability and facilitate disassembly and maintenance when needed, ensuring the reliability and ease of maintenance of the vacuum vulcanizing mold during long-term use.

[0029] In this embodiment, the vacuum vulcanizing mold for vulcanizing tires also includes a second sealing element 80, which is disposed between the lower steel ring 70 and the lower mold half 20, thereby further increasing the sealing performance of the vacuum vulcanizing mold and improving the stability of the vacuum environment. Thus, when the vacuum vulcanizing mold is closed, the second sealing element 80 forms a seal between the lower steel ring 70 and the lower mold half 20, thereby improving the sealing performance at the bottom of the vulcanizing chamber and ensuring a tight seal between the contact surfaces of the lower mold half 20 and the lower steel ring 70 during vulcanization, thereby creating a more stable vacuum environment inside the entire vulcanizing chamber. Optionally, the materials of the first sealing element 50, the second sealing element 80, and the third sealing element 90 can be high-temperature resistant, high-elasticity special rubber or silicone, which can maintain good physical properties at high temperatures and possess excellent resilience and wear resistance characteristics, maintaining the reliability of their sealing function even during long-term, multiple vulcanization cycles.

[0030] In this embodiment, the vacuum vulcanizing mold for vulcanizing tires also includes a third sealing element 90. The third sealing element 90 is disposed between the lower mold half 20 and the lower mold sealing cover 40, thereby further enhancing the sealing effect of the vacuum vulcanizing mold and ensuring the stability and reliability of the vacuum environment. Specifically, in this embodiment, a limiting step is provided at the bottom of the lower mold half 20, i.e., on the side of the lower mold half 20 near the lower mold sealing cover 40. A positioning protrusion is provided on the side of the lower mold sealing cover 40 near the lower mold half 20. The limiting step is located on the inner circumference of the lower mold half 20, and the positioning protrusion is located on the inner circumference of the lower mold sealing cover 40. The third sealing element 90 is disposed at the position where the limiting step and the positioning protrusion abut against each other, thereby improving the sealing performance and making the relative position of the lower mold half 20 and the lower mold sealing element more stable and reliable, thus improving the stability of the connection between the lower mold half 20 and the lower mold sealing element.

[0031] In this embodiment, the vacuum vulcanizing mold for vulcanizing tires also includes a vacuum pump connected to a vacuum extraction port 42. The vacuum pump can evacuate the vulcanizing chamber after the upper mold sealing cover 30 and the lower mold sealing cover 40 are mated together. Thus, by connecting the vacuum pump to the vacuum extraction port 42, vacuum extraction is achieved after the vacuum vulcanizing mold is closed, ensuring a vacuum environment within the vulcanizing chamber. Specifically, the vacuum extraction port 42 can be located on the upper mold sealing cover 30 or the lower mold sealing cover 40. If necessary, it can be located on both the upper mold sealing cover 30 and the lower mold sealing cover 40, as long as it connects the outside of the vacuum vulcanizing mold and the inside of the vulcanizing chamber. In this embodiment, as... Figure 1As shown, the vacuum hole 42 is located on the lower mold sealing cover 40, and at the end of the lower mold sealing cover 40 away from the upper mold sealing cover 30, to avoid the engagement of the annular protrusion 31 and the annular recess 41. When the vacuum vulcanizing mold is closed, the vacuum pump is started, and the air in the vulcanizing chamber is extracted through the vacuum hole 42, so that the vulcanizing chamber is in a negative pressure state, thereby avoiding the phenomenon of a large amount of rubber hair after the tire vulcanization, thus effectively ensuring the quality of tire vulcanization.

[0032] In this embodiment, the vacuum vulcanizing mold for vulcanizing tires also includes multiple fasteners. The upper mold 10 and the upper mold sealing cover 30, and the lower mold 20 and the lower mold sealing cover 40 are connected by fasteners, thereby ensuring a tight connection between the upper mold 10 and the upper mold sealing cover 30, and between the lower mold 20 and the lower mold sealing cover 40. This ensures precise alignment of the upper and lower molds during the vulcanization process, thereby improving the mold's sealing performance and stability. Optionally, the fasteners can be bolts.

[0033] The process of using the vacuum vulcanizing mold in this embodiment is as follows: During tire vulcanization, the upper mold sealing cover 30 moves downward under the action of the vulcanizing machine. At this time, the first sealing element 50 contacts the lower mold sealing cover 40 to form a vacuum seal. Then, the second sealing ring and the third sealing ring simultaneously achieve sealing. The vacuum pump performs a vacuuming action, and then a vacuum negative pressure state is formed inside the vacuum vulcanizing mold until the tire vulcanization process is completed.

[0034] It should be noted that "multiple" in the above embodiments refers to at least two.

[0035] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0036] 1. This technology solves the problem of excessive rubber fibers appearing during the tire vulcanization process in existing technologies;

[0037] 2. By setting up a mating fit between the upper and lower mold halves, with the upper mold sealing cap positioned above the upper mold and the lower mold sealing cap positioned below the lower mold, and by providing a vacuum hole, a vulcanizing chamber is formed between the upper and lower mold halves. The gas inside the vulcanizing chamber can be effectively discharged through the vacuum hole, making the vulcanizing chamber a vacuum vulcanizing chamber. This eliminates the need for venting holes on the walls of the vulcanizing chamber to release air from the tire, thus avoiding the problem of uneven or incomplete venting that leads to a large amount of rubber fibers after tire vulcanization. This improves the tire's appearance quality, reduces the number of rubber fiber removal steps, and helps reduce labor intensity and increase work efficiency.

[0038] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vacuum mould for the vulcanisation of tyres, characterised in that, The vacuum vulcanization mold for vulcanizing a tire comprises: an upper half mold (10); a lower half mold (20) which is in abutting fit with the upper half mold (10) and forms a vulcanization cavity between the upper half mold (10) and the lower half mold (20); an upper mold sealing cover (30) which is connected with the upper half mold (10) and covers the upper half mold (10) from above; a lower mold sealing cover (40) which is sealingly connected with the lower half mold (20) and is arranged below the lower half mold (20), the upper mold sealing cover (30) being sealingly connected with the lower mold sealing cover (40), the upper mold sealing cover (30) and / or the lower mold sealing cover (40) having a vacuum hole (42) which communicates the vulcanization cavity with the outside of the vacuum vulcanization mold.

2. The vacuum mould for vulcanizing tyres according to claim 1, characterized in that, The upper mold sealing cover (30) has a downwardly protruding annular protrusion (31), the lower mold sealing cover (40) has a downwardly recessed annular recess (41), and at least part of the annular protrusion (31) is located in the annular recess (41) when the upper mold sealing cover (30) and the lower mold sealing cover (40) are in abutting fit.

3. The vacuum mould for vulcanizing tyres according to claim 2, characterized in that, The vacuum vulcanization mold for vulcanizing a tire further comprises a first sealing member (50) which is arranged between the outer periphery of the annular protrusion (31) and the inner periphery of the annular recess (41), and the upper mold sealing cover (30) and the lower mold sealing cover (40) are sealingly connected by the first sealing member (50).

4. The vacuum mould for vulcanizing tyres according to claim 3, characterized in that, The outer periphery of the annular protrusion (31) and / or the inner periphery of the annular recess (41) is provided with an annular groove, and the first sealing member (50) is arranged in the annular groove.

5. The vacuum mould for vulcanizing tyres according to claim 1, characterized in that, The vacuum vulcanization mold for vulcanizing a tire further comprises: an upper bead ring (60) which is connected with the upper half mold (10) and is arranged on the inner periphery of the upper half mold (10); a lower bead ring (70) which is sealingly connected with the lower half mold (20) and is arranged on the inner periphery of the lower half mold (20).

6. The vacuum mould for vulcanizing tyres according to claim 5, characterized in that, The vacuum vulcanization mold for vulcanizing a tire further comprises a second sealing member (80) which is arranged between the lower bead ring (70) and the lower half mold (20).

7. The vacuum mould for vulcanizing tyres according to any one of claims 1 to 6, characterized in that, The vacuum vulcanization mold for vulcanizing a tire further comprises a third sealing member (90) which is arranged between the lower half mold (20) and the lower mold sealing cover (40).

8. The vacuum mould for vulcanizing tyres according to any one of claims 1 to 6, characterized in that, The vacuum vulcanization mold for vulcanizing a tire further comprises a vacuum pump which is connected with the vacuum hole (42) and can perform vacuumizing on the vulcanization cavity after the upper mold sealing cover (30) and the lower mold sealing cover (40) are in abutting fit.

9. The vacuum mould for vulcanizing tyres according to any one of claims 1 to 6, characterized in that, The vacuum vulcanization mold for vulcanizing a tire further comprises a plurality of fasteners, and the upper half mold (10) and the upper mold sealing cover (30) and the lower half mold (20) and the lower mold sealing cover (40) are connected by the fasteners.

10. A vulcanizing machine characterized by, A vacuum mould for vulcanizing tyres according to any one of claims 1 to 9.

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