Tire mold and curing press

Abstract

This invention provides a tire mold and a vulcanizing machine. The tire mold includes a tread block and an exhaust pin. The tread block has exhaust holes connecting its inner and outer sides. The exhaust pin is located within the exhaust holes. A first exhaust gap and a second exhaust gap exist between the exhaust pin and the tread block. The first and second exhaust gaps are arranged along the axial direction of the exhaust holes and are connected. The projection of the first exhaust gap onto a plane perpendicular to the axial direction of the exhaust pin is the first projection, and the projection of the second exhaust gap onto a plane perpendicular to the axial direction of the exhaust pin is the second projection. At least a portion of the first projection and at least a portion of the second projection are outside the range of the first projection. This invention solves the problem of rubber fibers remaining on the surface of the wheel after vulcanization in the prior art.

Description

Technical Field

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

[0002] The tire manufacturing process is very complex, and process control is also very important. During the tire vulcanization process, the gas in the mold is usually vented using a vent sleeve. A typical vent sleeve has a through hole with a diameter of 0.6mm to 1.0mm in the middle for venting. Therefore, rubber fibers are easily left on the tire surface after vulcanization, which makes the tire look bad. The rubber fibers need to be removed manually, which is labor-intensive and increases the amount of rubber used, wasting rubber and increasing tire costs. Utility Model Content

[0003] The main purpose of this invention is to provide a tire mold and a vulcanizing machine to solve the problem of rubber fibers remaining on the surface of tires after vulcanization in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a tire mold is provided, comprising: a tread block and an exhaust pin, the tread block having an exhaust hole connecting the inner and outer sides of the tread block; the exhaust pin being located within the exhaust hole, and a first exhaust gap and a second exhaust gap being present between the exhaust pin and the tread block, the first exhaust gap and the second exhaust gap being arranged and connected along the axial direction of the exhaust hole, the projection of the first exhaust gap onto a plane perpendicular to the axial direction of the exhaust pin being a first projection, the projection of the second exhaust gap onto a plane perpendicular to the axial direction of the exhaust pin being a second projection, at least a portion of the first projection being located outside the range of the second projection, and at least a portion of the second projection being located outside the range of the first projection.

[0005] Furthermore, the first exhaust gap is annular and is evenly distributed along the circumference of the exhaust pin.

[0006] Furthermore, the circumference of the exhaust pin has a recess extending axially along the exhaust port, the recess forming a second exhaust gap.

[0007] Furthermore, there are multiple second exhaust gaps, and each second exhaust gap is evenly distributed along the circumference of the exhaust pin.

[0008] Furthermore, the exhaust pin includes a first section and a second section arranged axially, the diameter of the first section is larger than the diameter of the second section, a first exhaust gap is formed between the first section and the patterned block, and the second section has a recess.

[0009] Furthermore, the exhaust pin also includes a third section, which is axially connected to the second section, and the diameter of the second section is larger than the diameter of the third section.

[0010] Furthermore, the exhaust port includes a large-diameter section, a medium-diameter section, and a small-diameter section arranged axially in sequence. The exhaust port and the exhaust pin are coaxially arranged, and the large-diameter section, the medium-diameter section, and the small-diameter section are respectively arranged to correspond one-to-one with the first section, the second section, and the third section.

[0011] Furthermore, the diameter of the first segment is smaller than the diameter of the larger diameter segment, and the difference between the diameter of the first segment and the diameter of the larger diameter segment ranges from 0.04 to 0.1 mm.

[0012] Furthermore, the projected area of ​​the second exhaust gap on the plane perpendicular to the axial direction of the exhaust pin is greater than the projected area of ​​the first exhaust gap on the axial direction perpendicular to the exhaust pin.

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

[0014] By applying the technical solution of this utility model, the first exhaust gap and the second exhaust gap are connected along the axial direction of the exhaust hole but not aligned axially. That is, the projections of the first exhaust gap and the second exhaust gap on the plane perpendicular to the axial direction of the exhaust pin are misaligned. By utilizing the complementarity of the first exhaust gap and the second exhaust gap, gas can be discharged along the first exhaust gap and the second exhaust gap, while rubber material cannot be discharged along the first exhaust gap and the second exhaust gap. This avoids the problems of poor exhaust and rubber material overflow, thereby preventing the formation of rubber hairs on the tire surface, improving the appearance quality of the tire, reducing the labor intensity of workers, and reducing tire production costs. 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 patterned block and exhaust pin of this utility model is shown;

[0017] Figure 2 A partial cross-sectional view of the patterned block and exhaust pin of this utility model is shown;

[0018] Figure 3 A schematic diagram of the exhaust pin of this utility model is shown.

[0019] The above figures include the following reference numerals:

[0020] 10. Patterned block; 20. Exhaust pin; 21. First section; 22. Second section; 23. Third section; 24. Recess; 30. First exhaust gap; 40. Second exhaust gap. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] To address the problem of rubber residue remaining on the surface of tires after vulcanization in existing technologies, this invention provides a tire mold and a vulcanizing machine, wherein the vulcanizing machine includes the tire mold described below.

[0025] like Figures 1 to 3 A tire mold is shown, comprising: a tread block 10 and an exhaust pin 20. The tread block 10 has an exhaust hole connecting its inner and outer sides. The exhaust pin 20 is located inside the exhaust hole. A first exhaust gap 30 and a second exhaust gap 40 are provided between the exhaust pin 20 and the tread block 10. The first exhaust gap 30 and the second exhaust gap 40 are arranged and connected along the axial direction of the exhaust hole. The projection of the first exhaust gap 30 onto a plane perpendicular to the axial direction of the exhaust pin 20 is the first projection. The projection of the second exhaust gap 40 onto a plane perpendicular to the axial direction of the exhaust pin 20 is the second projection. At least a portion of the first projection is located outside the range of the second projection, and at least a portion of the second projection is located outside the range of the first projection.

[0026] This embodiment sets the first exhaust gap 30 and the second exhaust gap 40 to be axially connected but not axially aligned. That is, the projections of the first exhaust gap 30 and the second exhaust gap 40 on the plane perpendicular to the axial direction of the exhaust pin 20 are misaligned. By utilizing the complementarity of the first exhaust gap 30 and the second exhaust gap 40, gas can be discharged along the first exhaust gap 30 and the second exhaust gap 40, while rubber material cannot be discharged along the first exhaust gap 30 and the second exhaust gap 40. This avoids both poor exhaust and rubber material overflow, thereby preventing the formation of rubber hairs on the tire surface, improving the tire's appearance quality, reducing the labor intensity of workers, and lowering tire production costs.

[0027] It should be noted that the tread blocks 10 in this embodiment refer to the metal blocks arranged around the tire circumference during tire vulcanization. The tread blocks 10 are located in the tread area of ​​the tire mold and are responsible for shaping the outer surface of the tire. The central areas of these tread blocks 10 together constitute the vulcanization chamber for vulcanizing the tire. During the tire vulcanization process, the rubber compound is injected into the vulcanization chamber and then vulcanized and cured under high temperature and high pressure conditions to form the tread portion of the tire. The tread blocks 10 have a first side close to the vulcanization chamber and a second side away from the vulcanization chamber. The first side and the second side are arranged opposite to each other. The two inner sides of the tread blocks 10 refer to the first side and the second side of the tread blocks 10. The inside of the tread blocks 10 is the first side, and the outside of the tread blocks 10 is the second side.

[0028] In this embodiment, the vent hole penetrates through the patterned block 10, thereby connecting the first side and the second side of the patterned block 10, so that the gas in the vulcanizing chamber can be discharged to the outside of the vulcanizing chamber.

[0029] This embodiment has multiple vent holes to promote sufficient venting of the vulcanizing chamber and improve the uniformity of venting throughout the vulcanizing chamber. Each vent hole can be evenly distributed along the axial direction and / or circumferential direction of the vulcanizing chamber on the patterned block 10, thereby ensuring uniform gas discharge from all parts of the vulcanizing chamber. Figure 1 As shown, Figure 1 The patterned block 10 is illustrated using a single vent hole as an example. In actual use, multiple vent holes can be provided as needed. In this embodiment, the first vent gap 30 is located near the first side of the patterned block 10, and the second vent gap 40 is located near the second side of the patterned block 10, thereby penetrating the patterned block 10 along the axial direction of the vent hole.

[0030] In this embodiment, the first venting gap 30 is annular and uniformly arranged along the circumference of the venting pin 20, which facilitates uniform gas distribution and avoids excessive local pressure causing rubber material overflow. Specifically, in this embodiment, the venting pin 20 is cylindrical, and the venting hole is a circular hole. The first venting gap 30 is located between the circumferential side of the venting pin 20 and the inner wall of the venting hole. In this embodiment, the venting pin 20 and the venting hole are coaxially arranged, so that the gas in the vulcanizing chamber can be uniformly discharged into the first venting gap 30 along the circumference of the venting pin 20, and then discharged from the first venting gap 30 to the second venting gap 40, and finally discharged to the outside of the patterned block 10.

[0031] In this embodiment, the vent pin 20 has a recess 24 extending axially along the vent hole on its periphery. The recess 24 forms a second vent gap 40, thereby ensuring that the gas flowing out from the first vent gap 30 can be smoothly discharged to the outside of the patterned block 10. Specifically, the vent pin 20 in this embodiment also has a recess 24 on its periphery. The recess 24 connects the first vent gap 30 and the second side of the patterned block 10. The recess 24 can extend linearly along the axial direction of the vent pin 20 to the second side of the patterned block 10, or it can be bent and extend to the second side of the patterned block 10. Considering the convenience of processing, the recess 24 in this embodiment is set to the shape of a rectangular groove, extending axially along the vent pin 20 to the second side of the patterned block 10. Projected onto a plane perpendicular to the axis of the vent hole, the first vent gap 30 and the recess 24 may intersect but not overlap, thus allowing gas to escape while preventing rubber material from escaping with the gas. At the same time, after the gas escapes from the first vent gap 30, it enters the second vent gap 40, providing sufficient space to escape to the outside of the tread block 10, thereby improving the reliability of the tire mold, improving the appearance quality of the tire, and avoiding tire surface defects.

[0032] In this embodiment, there are multiple second exhaust gaps 40, each evenly distributed along the circumference of the exhaust pin 20, thereby improving the uniformity of gas discharge and avoiding uneven tire surface caused by localized poor exhaust. Specifically, in this embodiment, there are four second exhaust gaps 40 evenly distributed along the circumference of the exhaust pin 20, so that the annular first exhaust gap 30 can communicate with the second exhaust gaps 40 from multiple points, thereby allowing the gas entering the first exhaust gap 30 to evenly enter the second exhaust gaps 40 and be discharged to the outside of the tread block 10, thus improving the uniformity of exhaust.

[0033] like Figure 2 , Figure 3As shown, in this embodiment, the vent pin 20 includes a first segment 21 and a second segment 22 arranged axially. The diameter of the first segment 21 is larger than the diameter of the second segment 22. A first vent gap 30 is formed between the first segment 21 and the patterned block 10. The second segment 22 has a recess 24. Thus, on a plane perpendicular to the axial direction of the vent hole, at least a portion of the projection of the second segment 22 is outside the projection range of the first end, allowing gas to be discharged smoothly while the adhesive is difficult to discharge. Specifically, along the axial direction of the vent hole, the diameter of the vent pin 20 in this embodiment is not entirely the same. The diameter of the first segment 21 is larger, but smaller than the diameter of the vent hole, so that a first vent gap 30 can be left between the periphery of the first segment 21 and the vent hole, allowing gas to be discharged. The diameter of the second segment 22 is smaller than that of the first segment 21, and the recess 24 is located in the second segment 22. Therefore, a stepped structure is formed between the first segment 21 and the second segment 22. Gas cannot enter the second exhaust gap 40 in a straight line along the first exhaust gap 30. Instead, the gas gathers along the stepped structure on the side of the recess 24 closer to the first exhaust gap 30 and is discharged from the side of the recess 24 away from the first exhaust gap 30. The stepped structure allows gases with higher fluidity and lower viscosity to smoothly pass through the stepped structure into the recess 24, while rubber materials with lower fluidity and higher viscosity, even if they can enter the first exhaust gap 30, cannot pass through the stepped structure into the recess 24. In this way, the diameter difference between the first segment 21 and the second segment 22 forms an effective gas discharge channel, while ensuring a good fit between the exhaust pin 20 and the tread block 10. The diameter difference between the first segment 21 and the second segment 22 can be adjusted according to actual needs to adapt to the production requirements of tires of different specifications and thicknesses, improving the versatility and flexibility of tire molds.

[0034] In this embodiment, the exhaust pin 20 further includes a third segment 23, which is axially connected to the second segment 22. The diameter of the second segment 22 is larger than the diameter of the third segment 23. Thus, by adding a smaller diameter third segment 23, the gas exhaust path is further refined, while simultaneously improving the stability of the fit between the exhaust pin 20 and the exhaust port. Specifically, in this embodiment, the diameters of the first segment 21, the second segment 22, and the third segment 23 of the exhaust pin 20 decrease sequentially. An annular stepped structure can be formed at the connection between the first segment 21 and the second segment 22, as well as at the connection between the second segment 22 and the third segment 23. The third segment 23 also has a recess 24, and the recesses 24 of the second segment 22 and the third segment 23 are connected axially along the exhaust pin 20. The gas has good fluidity, so it can flow smoothly through the two stepped structures to the outside of the patterned block 10. However, the adhesive has poor fluidity, and the flow direction needs to be changed at the stepped structures to pass through. In this embodiment, there are two stepped structures, so the adhesive is difficult to discharge through the stepped structures. The multi-segment design of the vent pin 20 can guide the gas discharge and prevent the adhesive from overflowing. On the other hand, it can improve the stability of the fit between the vent pin 20 and the vent hole and prevent the vent pin 20 from falling out of the vent hole. Of course, depending on the actual situation such as the fluidity of the adhesive, the vent pin 20 can also be set to have four, five or more segments with different diameters, or the diameters of the first segment 21, the second segment 22, and the third segment 23 of the vent pin 20 can be set to increase sequentially.

[0035] In this embodiment, the lengths of the first segment 21, the second segment 22, and the third segment 23 along the axial direction of the exhaust pin 20 can be sequentially reduced to facilitate gas discharge. Considering that the first segment 21 needs to prevent the passage of adhesive material but also needs to allow gas to pass through, the length of the first segment 21 is set to be the minimum to avoid making gas passage difficult due to an excessively long first segment 21. The second segment 22 and the third segment 23 can provide guidance for the flow and discharge of gas, and can be appropriately longer than the first segment 21 to facilitate the gas being led out to the outside of the patterned block 10.

[0036] In this embodiment, the vent hole includes a large-diameter section, a medium-diameter section, and a small-diameter section arranged axially in sequence. The vent hole and the vent pin 20 are coaxially arranged, and the large-diameter section, medium-diameter section, and small-diameter section correspond one-to-one with the first section 21, the second section 22, and the third section 23, respectively. By matching different vent hole diameters with different diameter sections of the vent pin 20, a multi-stage venting system is formed. This ensures effective gas discharge while preventing rubber overflow, making the venting process more controllable and resulting in superior surface quality after tire vulcanization. Specifically, the diameter variation of the vent hole in this embodiment follows the same pattern as the diameter variation of the vent pin 20, i.e., the diameters of the large-diameter section, medium-diameter section, and small-diameter section decrease sequentially, allowing the vent pin 20 to be fitted into the vent hole and vent smoothly. The diameter of the large-diameter section is slightly larger than the diameter of the first section 21, thus forming a first venting gap 30 that only allows gas to pass through. The diameter of the middle section is the same as the maximum diameter of the second section 22, so that the exhaust pin 20 can be fixed in the exhaust hole. The diameter of the small section is the same as the maximum diameter of the third section 23, thereby further improving the stability of the assembly of the exhaust hole and the exhaust pin 20, and preventing the exhaust pin 20 from being displaced or even falling out of the exhaust hole due to pressure, vibration and other reasons, which would affect the exhaust.

[0037] In this embodiment, the diameter of the first segment 21 is smaller than the diameter of the large-diameter segment, and the difference between the diameters of the first segment 21 and the large-diameter segment ranges from 0.04 to 0.1 mm. This ensures that the first venting gap 30 only allows gas to flow out, while preventing rubber material from overflowing. Specifically, based on gas dynamics, the single-sided gap between the outer periphery of the first segment 21 and the inner wall of the large-diameter segment is set to 0.02-0.05 mm, preferably 0.03 mm. This size of gap effectively vents gas without causing rubber material leakage, resulting in a smoother surface after tire vulcanization, free of rubber residue.

[0038] In this embodiment, to ensure smooth gas discharge from the first venting gap 30 to the second venting gap 40, the projected area of ​​the second venting gap 40 on a plane perpendicular to the axial direction of the venting pin 20 is set to be larger than the projected area of ​​the first venting gap 30 on the same axial direction. This provides different venting capacities for the first venting gap 30 and the second venting gap 40, ensuring stable and efficient gas discharge throughout the vulcanization process. Specifically, in this embodiment, the second venting gap 40 is located between the four recesses 24 of the venting pin 20 and the venting holes. The sum of the projected areas of these four recesses 24 and the venting holes should be greater than the projected area of ​​the first venting gap 30. This allows gas to enter the second venting gap 40 from the first venting gap 30 and be discharged more smoothly. Meanwhile, the rubber compound, due to the smaller size of the first venting gap 30, has difficulty entering the first venting gap 30, and the rubber compound cannot smoothly pass through the stepped structure between the first segment 21 and the second segment 22. This results in more balanced venting during tire vulcanization, avoiding tire surface defects caused by poor local gas discharge or rubber compound overflow.

[0039] Preferably, the width of the recess 24 is set to 0.8-1 mm and the depth to 0.5 mm, thereby allowing gas to be discharged more easily from the second exhaust gap 40. The width and depth of the recess 24 refer to the fact that the projection of the recess 24 onto a plane perpendicular to the axis of the exhaust pin 20 is rectangular, with the two sides of the rectangle being the width and depth, respectively. The longer side is the width, and the shorter side is the depth, to facilitate the collection of gas from the first exhaust gap 30 into the second exhaust gap 40. Of course, the width and depth can be interchanged depending on the actual situation.

[0040] The assembly and use process of the tire mold in this embodiment is as follows: First, the air jacket mounting hole in the traditional venting mode is machined normally on the tread block 10, which is the venting hole in this embodiment. It should be noted that the size of the large diameter section of the venting hole is 0.04-0.01mm larger than the diameter of the first section 21 of the venting pin 20, preferably 0.06mm. That is, the size of the single-sided gap between the venting hole and the venting pin 20, which is the gap of the first venting gap 30, is 0.02-0.05mm, preferably 0.03mm. The recess 24 is machined in four equal parts in the circumferential direction of the venting pin 20. After the venting hole is machined, the venting pin 20 is inserted into the venting hole. During tire vulcanization, the excess gas in the vulcanization chamber first enters the second venting gap 40 through the first venting gap 30, and then is discharged to the outside of the tread block 10. The size of the first venting gap 30 is set so that the rubber material cannot overflow and the gas can be discharged just right, thereby achieving a tire vulcanization surface without rubber hair, which greatly improves the appearance quality of the tire.

[0041] In this embodiment, the tire mold eliminates the ordinary venting method. By setting the first venting gap 30 and the second venting gap 40, the venting function can be better achieved during the tire vulcanization process without leaving rubber fibers, thereby improving the tire surface quality, reducing labor intensity, and thus reducing the tire production cost.

[0042] It should be noted that "multiple" in the above embodiments refers to at least two.

[0043] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0044] 1. This solves the problem of rubber fibers remaining on the surface of wheels after vulcanization in existing technologies;

[0045] 2. By setting the first exhaust gap and the second exhaust gap to be connected along the axial direction of the exhaust hole but not aligned in the axial direction, that is, the projections of the first exhaust gap and the second exhaust gap on the plane perpendicular to the axial direction of the exhaust pin are misaligned, thereby utilizing the complementarity of the first exhaust gap and the second exhaust gap, the gas can be discharged along the first exhaust gap and the second exhaust gap, while the adhesive cannot be discharged along the first exhaust gap and the second exhaust gap.

[0046] 3. It avoids problems such as poor airflow and rubber overflow, thereby preventing the formation of rubber fibers on the tire surface, improving the appearance quality of the tire, reducing the labor intensity of workers, and reducing tire production costs.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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 tire mold characterized by, include: Patterned block (10), the patterned block (10) has an exhaust hole connecting the inner and outer sides of the patterned block (10); An exhaust pin (20) is located inside the exhaust hole. The exhaust pin (20) and the patterned block (10) have a first exhaust gap (30) and a second exhaust gap (40). The first exhaust gap (30) and the second exhaust gap (40) are arranged and connected along the axial direction of the exhaust hole. The projection of the first exhaust gap (30) onto a plane perpendicular to the axial direction of the exhaust pin (20) is a first projection. The projection of the second exhaust gap (40) onto a plane perpendicular to the axial direction of the exhaust pin (20) is a second projection. At least a portion of the first projection is located outside the range of the second projection, and at least a portion of the second projection is located outside the range of the first projection.

2. The tire mold according to claim 1, wherein, The first exhaust gap (30) is annular and is evenly distributed along the circumference of the exhaust pin (20).

3. The tire mold of claim 1, wherein, The vent pin (20) has a recess (24) extending axially along the vent hole on its periphery, the recess (24) forming the second vent gap (40).

4. The tire mold according to claim 3, wherein, There are multiple second exhaust gaps (40), and each second exhaust gap (40) is evenly distributed along the circumference of the exhaust pin (20).

5. The tire mold of claim 3, wherein, The exhaust pin (20) includes a first section (21) and a second section (22) arranged along the axial direction. The diameter of the first section (21) is larger than the diameter of the second section (22). The first section (21) and the patterned block (10) form the first exhaust gap (30). The second section (22) has the recess (24).

6. The tire mold of claim 5, wherein, The exhaust pin (20) also includes a third section (23), which is axially connected to the second section (22), and the diameter of the second section (22) is larger than the diameter of the third section (23).

7. The tire mold according to claim 6, wherein, The exhaust port includes a large diameter section, a medium diameter section, and a small diameter section arranged axially in sequence. The exhaust port and the exhaust pin (20) are coaxially arranged, and the large diameter section, the medium diameter section, and the small diameter section are respectively arranged in a one-to-one correspondence with the first section (21), the second section (22), and the third section (23).

8. The tire mold according to claim 7, wherein, The diameter of the first segment (21) is smaller than the diameter of the large-diameter segment, and the difference between the diameter of the first segment (21) and the diameter of the large-diameter segment is in the range of 0.04-0.1 mm.

9. The tire mold of claim 1, wherein, The projected area of ​​the second exhaust gap (40) on a plane perpendicular to the axial direction of the exhaust pin (20) is greater than the projected area of ​​the first exhaust gap (30) on the axial direction perpendicular to the exhaust pin (20).

10. A vulcanizing machine, characterized in that, The tire mold includes any one of claims 1 to 9.

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