Tire with enhanced sidewall blackness and tire vulcanization mold

Abstract

The present invention relates to the field of tires, and in particular to a tire and a tire vulcanization mold for enhancing the blackness of a sidewall, wherein the tire includes a marking area provided on the sidewall, wherein the marking area is provided with a pattern fill, wherein the pattern fill is formed by a regular arrangement of a plurality of identical pattern units, wherein the pattern units include a first element extending in a first direction, a second element extending in a second direction, a third element extending in a third direction, and a fourth element extending in a fourth direction, wherein the plurality of first elements are arranged side by side to form a first region, the plurality of second elements are arranged side by side to form a second region, the plurality of third elements are arranged side by side to form a third region, and the plurality of fourth elements are arranged side by side to form a fourth region. The present invention optimizes the shape of the pattern units so that the pattern units are more closely inlaid, the area of ​​the blank area is reduced, and thus the contrast between the pattern units and the sidewall is increased, thereby enhancing the visual impact.

Description

Technical Field

[0001] The invention relates to the field of tires, in particular to a tire with enhanced sidewall blackness and a tire vulcanization mold. Background Art

[0002] Tires are the only ground-engaging components of a vehicle, providing the driving, steering, and braking forces required for vehicle movement. Due to the unique characteristics of road conditions and driving scenarios, tires require the addition of carbon black, resulting in a predominantly black surface. The tire sidewall typically contains graphics, logos, and regulatory requirements. These details convey information about the tire's brand, type, size, and performance to the purchaser or user. This information is typically black, resulting in a low contrast on the sidewall, making it visually impactful and difficult to clearly perceive.

[0003] To enhance visual contrast on the sidewall, a Chinese invention patent (CN108407347B) discloses a tire and tire mold featuring a novel sidewall pattern. The tire comprises a carcass with a marking area on the side of the carcass (i.e., the sidewall). The marking area contains multiple pattern units. The pattern units protrude from the carcass and comprise a central portion and multiple extensions circumferentially distributed around the central portion, with the central portion being taller than the extensions. This creates a visually concave-convex pattern. Light incident on the pattern units reflects back and forth between the sidewalls, attenuating the light intensity. Ultimately, only a small amount of light is reflected outside the pattern units, making them appear darker than the rest of the sidewall, enhancing visual contrast.

[0004] However, it can be found in the embodiments provided by the above patent that although the extensions of the pattern units are inserted between the extensions of adjacent pattern units to reduce the blank areas between the pattern units, the area of ​​the blank areas is still relatively large. It is measured to be about 20% of the area of ​​each pattern unit. These blank areas are located on the surface of the sidewall, so they appear to be relatively low-saturation black at these locations. These larger blank areas affect the overall visual contrast of the pattern units. From the actual tire, the contrast of the pattern units is not as high as imagined, and there is still room for further improvement. Summary of the Invention

[0005] To solve the above problems, the purpose of the present invention is to provide a tire and a tire vulcanization mold with enhanced sidewall blackness. By optimizing the shape of the pattern units, the pattern units are inlaid more tightly, the area of ​​the blank area is reduced, and the contrast between the pattern units and the sidewall is increased, thereby enhancing the visual impact.

[0006] For the purpose of the present invention, the following technical solutions are adopted:

[0007] In a first aspect, an embodiment of the present invention provides a tire with enhanced sidewall blackness, comprising an identification area arranged on the sidewall, wherein a pattern filling is provided in the identification area, wherein the pattern filling is formed by a regular arrangement of a plurality of identical pattern units, wherein the pattern units protrude from a reference plane of the sidewall and have sidewalls forming an angle with the reference plane, wherein the sidewalls are configured so that light is reflected between the sidewalls, thereby deepening the color displayed in the identification area, wherein the pattern units include a first element extending in a first direction, a second element extending in a second direction, a third element extending in a third direction, and a fourth element extending in a fourth direction, wherein a plurality of first elements are arranged side by side to form a first area, a plurality of second elements are arranged side by side to form a second area, a plurality of third elements are arranged side by side to form a third area, and a plurality of fourth elements are arranged side by side to form a fourth area. The fourth area is formed by side-by-side arrangement, wherein the first area and the second area are located at the upper part of the pattern unit, and the first area and the second area are distributed left and right and connected to each other, the third area is located in the middle of the pattern unit, and one side of the upper part of the third area is connected to the first area and the second area, the fourth area is located at the lower part of the pattern unit, and one side of the lower part of the third area is connected to the fourth area, and when the pattern units are arranged, they are aligned with each other in the horizontal and vertical directions, the upper side of the first area is parallel to and adjacent to the lower side of the third area of ​​the upper left pattern unit, the upper side of the second area is parallel to and adjacent to the lower side of the fourth area of ​​the upper right pattern unit, the lower side of the second area is parallel to and adjacent to the left side of the third area of ​​the right pattern unit, and the right side of the third area is parallel to and adjacent to the left side of the fourth area of ​​the right pattern unit. Therefore, the first area, the second area, the third area and the fourth area in the pattern unit have a specific arrangement method, so that the pattern units can be distributed tightly enough when arranged, and the gaps between the boundaries of the pattern units are reduced, thereby reducing the area of ​​the blank areas between the pattern units. At the same time, in each of the above areas, the corresponding elements also have specific extension directions and specific arrangement directions. Therefore, there is also a relatively small blank area inside the pattern unit. Overall, the pattern fill has a smaller blank area, and the area of ​​the blank area accounts for a relatively small proportion, which improves the contrast between the pattern fill and the sidewall, and has a stronger visual impact.

[0008] In one embodiment, the first direction is 45° away from the second direction, the first direction is 135° away from the third direction, and the first direction is parallel to the fourth direction. As a result, the extension directions of the corresponding elements in each region are significantly different, making it difficult for light to reflect from the pattern units, thereby enhancing the depth of the color of the pattern units and further improving the visual effect.

[0009] In one embodiment, the first element, the second element, the third element, and the fourth element all extend in a straight line. Thus, in each region, the elements have a single extension direction, and visually, each position in the region appears to be the same color, thereby achieving overall visual unity of the region and improving the visual effect.

[0010] In one embodiment, the gaps between the first element boundaries, the gaps between the second element boundaries, the gaps between the third element boundaries, the gaps between the fourth element boundaries, and the gaps between pattern units are all maintained between 0.05 and 0.5 mm. As a result, the gaps between elements in the pattern unit become sufficiently small to reduce the area of ​​the blank area within the pattern unit. At the same time, the gaps between pattern units also become sufficiently small to enable the pattern units to be inlaid more closely. Furthermore, such spacing facilitates the formation of boundary lines and facilitates processing and manufacturing.

[0011] In one embodiment, the gaps between the first element boundaries are equal, the gaps between the second element boundaries are equal, the gaps between the third element boundaries are equal, and the gaps between the fourth element boundaries are equal. Thus, the equal spacing between the identical elements enhances the integrity of the area formed by the elements, and in terms of appearance, the color consistency within the area is improved, which helps to enhance the visual effect.

[0012] In one embodiment, the gaps between the first element boundaries, the gaps between the second element boundaries, and the gaps between the fourth element boundaries are equal, and the gaps between the third element boundaries are greater than the gaps between the first element boundaries.

[0013] In one embodiment, the third region includes a third region A and a third region B, the third region A is connected between the first region and the fourth region, and the third element in the third region A is continuous with the first element in the first region and the fourth element in the fourth region, and the third region B is located at the bottom right of the third region A and is staggered with the third region A.

[0014] In one embodiment, white space is present within pattern units and between adjacent pattern units, with the white space occupying 6-12% of the pattern unit area. This reduces the proportion of white space within the pattern fill, thereby deepening the color of the pattern fill and enhancing its visual impact.

[0015] In one embodiment, the first element and the fourth element are both first strip-shaped protrusions protruding outward from the sidewall reference plane, the second element is a second strip-shaped protrusion protruding outward from the sidewall reference plane, and the third element is a third strip-shaped protrusion protruding outward from the sidewall reference plane. The first strip-shaped protrusion, the second strip-shaped protrusion, and the third strip-shaped protrusion have the same height, and the width of the first strip-shaped protrusion is ≤ the second strip-shaped protrusion ≤ the third strip-shaped protrusion.

[0016] The height of the first, second, and third protrusions is 0.2-1mm, their width is 0.1-0.5mm, and the angle between their sidewalls and the reference plane is 10-35°. The cross-section of the protrusions is triangular or trapezoidal. These parameters define the shape of the protrusions, allowing light to reflect back and forth between the sidewalls of the pattern units, ultimately weakening the light intensity and reducing the light reflected from the pattern units, making the pattern fill appear darker.

[0017] In a second aspect, an embodiment of the present invention provides a tire vulcanization mold for manufacturing the above-mentioned tire with enhanced sidewall blackness. A reverse pattern filling is provided on the inner surface of the mold at a position corresponding to the marking area of ​​the sidewall. The concave and convex direction of the reverse pattern filling is opposite to that of the pattern filling, so that the pattern filling is formed in the marking area when the tire is vulcanized.

[0018] Compared with the prior art, the embodiments of the present invention have at least the following beneficial effects: the arrangement of the elements within the pattern unit results in a smaller blank area within the pattern unit, and the arrangement between the pattern units reduces the gaps between the pattern units, and the adjacent pattern units are arranged more closely, thereby reducing the blank area between the pattern units. Therefore, the pattern filling appears darker as a whole, and the contrast between the marking area and the rest of the sidewall is improved, thereby enhancing the visual impact. In addition, the shape of the pattern unit provided in this embodiment can also effectively solve the problem of rubber deficiency on the tire sidewall caused by the filling area. The strip-shaped protrusions within the pattern unit are continuous and tortuous, which can increase the stiffness of the strip-shaped protrusions, avoid stress concentration, and prevent fracture. In addition, the tortuous structure can also buffer and disperse stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a side view of a tire provided in an embodiment of the present invention.

[0020] Figure 2 Schematic diagram of a pattern filling formed by arranging a plurality of pattern units in an embodiment of the present invention.

[0021] Figure 3 Schematic diagram of a single pattern unit in an embodiment of the present invention.

[0022] Figure 4 for Figure 3 Cross-sectional view at AA in the middle.

[0023] Figure 5 for Figure 3 Cross-sectional view at the middle BB.

[0024] Figure 6for Figure 3 Cross-sectional view at CC.

[0025] Figure 7 Schematic diagram of blank areas between and within pattern units in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Figure 1 A side view of a tire provided in an embodiment of the present invention is shown. Figure 1 Vehicle tire 100 includes a sidewall 110 located on an axial side of tire 100. Sidewall 110 is annular and typically has several identifying features on its outer surface. These identifying features may be a combination of one or more of the following: numbers, letters, logos, manufacturer's brand name, tire size, tire rotation direction, manufacturing serial number, and so on. In this embodiment, the identifying features are a combination of numbers and letters, forming the appearance of "12R22.5 MZ1."

[0027] The identification features are usually added by transferring the concave and convex structures on the vulcanization mold to the surface of the sidewall 110 when the tire is vulcanized. Therefore, these transferred identification features usually have the same color as the surface of the sidewall 110, and the relevant information can be confirmed by visually confirming the concave and convex structures relative to the surface of the sidewall 110.

[0028] Typically, the entire sidewall 110 is black, gray, or a combination thereof. Accordingly, the marking features are also black, gray, or a combination thereof. Consequently, there is a lack of contrast between the marking features and the surface color of the sidewall 110. This means that tire manufacturers, sellers, buyers, and users require relatively focused attention to clearly and completely discern the information recorded in the marking area. In short, the visual impact of the marking features in the prior art is low.

[0029] In this embodiment, the area on the sidewall 110 occupied by these identification features is defined as the identification area, and the other areas on the sidewall 110 without identification features are defined as the non-identification area. The surface of the sidewall 110 in the non-identification area is usually relatively smooth. To be precise, at these positions, except for the necessary lines on the surface of the sidewall 110 (usually extending along the circumference of the tire to form a ring), there are not too many lines, and the overall surface is relatively flat.

[0030] In this embodiment, the boundary of the identification feature is defined by the shape of the identification feature itself, and a pattern fill 200 is provided inside the boundary. These pattern fills 200 have undulations on the reference surface of the sidewall 110 (the imaginary surface of the sidewall when there is no pattern fill 200). Figure 1The pattern fill 200 has a characteristic of undulating along the inside-outside direction of the paper, that is, it is uneven. Specifically, the pattern fill 200 includes strip-shaped protrusions protruding outward from the reference plane. These strip-shaped protrusions extend along a specific trajectory within the reference plane to form a pattern. These strip-shaped protrusions have inclined sidewalls. Specifically, the sidewalls form an acute angle with the reference plane, for example, an angle of 10 to 30 degrees.

[0031] The purpose of setting the above-mentioned pattern filling 200 is that when external light (such as sunlight, lamplight) is incident on the interior of the pattern filling 200, it will be reflected on the side wall of the strip-shaped protrusion, and due to the design of the inclination angle of the side wall, most of the reflected light will continue to be projected on the interior of the pattern filling 200. After the above-mentioned continuous reflection process, the light intensity gradually weakens, and finally only a small amount of light can leave the pattern filling 200. Therefore, for the observer, the color of the logo area will appear darker than that of the non-logo area, which increases the contrast between the logo area and the non-logo area and enhances the visual impact.

[0032] like Figure 2 As shown, the pattern filling 200 is usually formed by a number of identical and independent pattern units 210 arranged according to a certain pattern. Generally speaking, in order to ensure that the pattern filling 200 produces a better visual effect, the pattern units 210 need to be arranged more closely, that is, the pattern units 210 have a higher distribution density, for example, there is at least one pattern unit 210 per square millimeter to ensure that each part of the pattern filling 200 can reflect a good visual effect.

[0033] Furthermore, a certain amount of clearance (also known as a blank area) is required between the boundaries of adjacent pattern units 210 to facilitate the processing and forming of the pattern units 210. More precisely, this is to facilitate the processing of the vulcanization mold mentioned above. This is because the vulcanization mold requires a pre-set reverse pattern fill, in the opposite direction of the pattern fill, in order to produce the corresponding identification features on the sidewall 110 during vulcanization. Without clearance between the pattern units 210, the processing of these reverse pattern fills becomes difficult. Furthermore, since the rubber material will slightly shift during the vulcanization process, without this clearance, the shape of the pattern units 210 formed by the processing becomes uncontrollable.

[0034] It should be noted here that the gap between the pattern units 210 should not be too large, otherwise a relatively flat area with a large area will be formed at the connection between adjacent pattern units 210. The existence of this area will enable the incident light to be directly reflected out of the pattern unit 210, thereby weakening the visual impact of the identification feature.

[0035] In this embodiment, the gap between the pattern units 210 is 0.02 mm. However, in fact, as long as the gap is between 0.005 and 0.05 mm, the area of ​​the blank area can be reduced while ensuring the shape of the pattern unit 210 is easy to process and manufacture, thereby making the identification feature show a higher visual effect.

[0036] Figure 3 Schematic diagram of a single pattern unit in an embodiment of the present invention. Figure 3 In this embodiment, the pattern unit 210 includes a first element 2111 extending in a first direction, a second element 2121 extending in a second direction, a third element 2131 extending in a third direction, and a fourth element 2141 extending in a fourth direction. Several first elements 2111 are arranged side by side to form a first region 211, several second elements 2121 are arranged side by side to form a second region 212, several third elements 2131 are arranged side by side to form a third region 213, and several fourth elements 2141 are arranged side by side to form a fourth region 214. The first region 211 and the second region 212 are located at the top of the pattern unit 210. Both the first region 211 and the second region 212 are roughly triangular in shape and are connected to each other in a left-right distribution. The third region 213 is located in the middle of the pattern unit 210. The third region 213 roughly includes a rectangle at the top and a parallelogram at the bottom. The right side of the upper portion of the third region 213 is connected to the lower portions of the first region 211 and the second region 212. The fourth region 214 is substantially a parallelogram. The fourth region 214 is located at the lower portion of the pattern unit 210 , and a lower side of the third region 213 is connected to an upper side of the fourth region 214 .

[0037] In this embodiment, the first direction is 45° away from the second direction, the first direction is 135° away from the third direction, and the first direction is parallel to the fourth direction. More precisely, Figure 3 As shown, the first element 2111 extends vertically, while the second element 2121 extends from the upper left to the lower right, forming a 45° angle between the first element 2111 and the second element 2121. The third element extends from the lower left to the upper right, forming a 135° angle (which can also be considered 45°) between the third element 2131 and the first element 2111, and a 90° angle between the third element 2131 and the second element 2121. The fourth element 2141 extends vertically, parallel to the first element 2111. As a result, the extension directions of the corresponding elements in each area differ significantly, making it difficult for light to reflect from the pattern units, thereby enhancing the depth of the color of the pattern units and further improving the visual effect.

[0038] In this embodiment, the first element 2111, the second element 2121, the third element 2131, and the fourth element 2141 all extend in a straight line. Thus, in each region, the elements have a single extension direction, and visually, each position in the region appears to be the same color, thereby achieving overall visual uniformity and improving the visual effect.

[0039] The gaps between the boundaries of the first element 2111, the gaps between the boundaries of the second element 2121, the gaps between the boundaries of the third element 2131, the gaps between the boundaries of the fourth element 2141, and the gaps between the pattern units 210 are all maintained between 0.05 and 0.5 mm. As a result, the gaps between the elements in the pattern unit are sufficiently small to reduce the area of ​​the blank area within the pattern unit. At the same time, the gaps between the pattern units are also sufficiently small to enable the pattern units to be inlaid more closely. In addition, such spacing also facilitates the formation of boundary lines and facilitates processing and manufacturing.

[0040] Furthermore, the gaps between the boundaries of the first element 2111 are equal, the gaps between the boundaries of the second element 2121 are equal, the gaps between the boundaries of the third element 2131 are equal, and the gaps between the boundaries of the fourth element 2141 are equal. Thus, the equal spacing between the identical elements enhances the integrity of the area formed by the elements, and in terms of appearance, the color consistency within the area becomes better, which helps to improve the visual effect.

[0041] Specifically, in this embodiment, the gap between the boundaries of the first element 2111, the gap between the boundaries of the second element 2121, and the gap between the boundaries of the fourth element 2141 are equal, all of which are 0.02 mm. The gap between the boundaries of the third element 2131 is greater than the gap between the boundaries of the first element 2111, and the gap between the boundaries of the third element 2131 is 0.03 mm.

[0042] like Figure 3 As shown, the third area 213 includes a third area A213a and a third area B213b, the third area A213a is connected between the first area 211 and the fourth area 214, and the third element 2131 in the third area A213a is continuous with the first element 2111 in the first area 211 and the fourth element 2141 in the fourth area 214, and the third area B213b is located at the lower right of the third area A213a and is staggered with the third area A213a.

[0043] Figure 2 FIG. 1 shows a schematic diagram of a pattern filling formed by arranging a plurality of pattern units in an embodiment of the present invention. Figure 2As shown, when the pattern units 210 are arranged, the upper side of the first area 211 is parallel to and adjacent to the lower side of the third area 213 of the upper left pattern unit, the upper side of the second area 212 is parallel to and adjacent to the lower side of the fourth area 214 of the upper right pattern unit, the lower side of the second area 212 is parallel to and adjacent to the left side of the third area 213 of the right pattern unit, the right side of the third area 213 is parallel to and adjacent to the left side of the fourth area 214 of the right pattern unit, the lower side of the third area 213 is parallel to and adjacent to the upper side of the first area 211 of the lower right pattern unit, the left side of the fourth area 214 is parallel to and adjacent to the right side of the third area of ​​the right pattern unit, and the lower side of the fourth area 214 is parallel to and adjacent to the upper side of the second area 212 of the lower left pattern unit.

[0044] Therefore, the first area, the second area, the third area and the fourth area in the pattern unit have a specific arrangement method, so that the pattern units can be distributed tightly enough when arranged, and the gaps between the boundaries of the pattern units are reduced, thereby reducing the area of ​​the blank areas between the pattern units. At the same time, in each of the above areas, the corresponding elements also have specific extension directions and specific arrangement directions. Therefore, there is also a relatively small blank area inside the pattern unit. Overall, the pattern fill has a smaller blank area, and the area of ​​the blank area accounts for a relatively small proportion, which improves the contrast between the pattern fill and the sidewall, and has a stronger visual impact.

[0045] Figure 7 A schematic diagram shows the blank areas between and within pattern units. Measurements show that the ratio of the blank areas to the area of ​​the pattern units is 8.4%. It should be noted that by appropriately adjusting the spacing between pattern units 210 and the shape of pattern units 210, the above area ratio can be adjusted between 6% and 12%.

[0046] In this embodiment, the first element 2111 and the fourth element 2141 are both first strip-shaped protrusions protruding outward from the sidewall reference plane, the second element 2121 is a second strip-shaped protrusion protruding outward from the sidewall reference plane, and the third element 2131 is a third strip-shaped protrusion protruding outward from the sidewall reference plane. The height of the first, second, and third protrusions is the same, ranging from 0.2 to 1 mm. The width of the first protrusion is ≤ the second protrusion, and ≤ the third protrusion, ranging from 0.1 to 0.5 mm. The angle between the sidewalls of the first, second, and third protrusions and the reference plane is 10 to 35 degrees. The cross-section of the protrusions is triangular or trapezoidal.

[0047] Figure 4 Shown Figure 3 Cross-sectional view at AA, see Figure 4In this embodiment, the height h1 of the first strip-shaped protrusion is 0.24 mm, the width w1 is 0.22 mm, and the angle θ1 between the side wall and the reference plane is 25°.

[0048] Figure 5 Shown Figure 3 Cross-sectional view at BB, see Figure 5 In this embodiment, the height h2 of the second strip-shaped protrusion is 0.24 mm, the width w2 is 0.28 mm, and the angle θ2 between the side wall and the reference plane is 31°.

[0049] Figure 6 Shown Figure 3 Cross-sectional view at CC, see Figure 6 In this embodiment, the height h3 of the third strip-shaped protrusion is 0.24 mm, the width w3 is 0.31 mm, and the angle θ3 between the side wall and the reference plane is 33°.

[0050] By defining the shape of the strip-shaped protrusions by the above parameters, light can be reflected back and forth between the side walls of the pattern units, and ultimately weaken the light intensity, thereby reducing the light reflected from the pattern units, making the pattern fill appear darker.

[0051] An embodiment of the present invention also provides a tire vulcanization mold for manufacturing the above-mentioned tire. A reverse pattern filling is provided on the inner surface of the mold at a position corresponding to the marking area of ​​the sidewall. The concave and convex direction of the reverse pattern filling is opposite to that of the pattern filling, so that the pattern filling is formed in the marking area when the tire is vulcanized.

[0052] The above is a description of the embodiments of the present invention. The above description of the disclosed embodiments will enable professionals in the field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tire with enhanced sidewall blackness, characterized in that: The tire comprises a marking area provided on the sidewall, wherein the marking area is provided with a pattern fill, wherein the pattern fill is formed by a plurality of identical pattern units arranged regularly, wherein the pattern units protrude from a reference plane of the sidewall and have sidewalls forming an angle with the reference plane, wherein the sidewalls are configured so that light is reflected between the sidewalls, thereby deepening the color displayed in the marking area. The pattern unit includes a first element extending in a first direction, a second element extending in a second direction, a third element extending in a third direction, and a fourth element extending in a fourth direction, wherein a plurality of first elements are arranged side by side to form a first region, a plurality of second elements are arranged side by side to form a second region, a plurality of third elements are arranged side by side to form a third region, and a plurality of fourth elements are arranged side by side to form a fourth region, wherein the first region and the second region are located in an upper portion of the pattern unit, and the first region and the second region are distributed left and right and connected to each other, the third region is located in a middle portion of the pattern unit, and one side of the upper portion of the third region is connected to the first region and the second region, the fourth region is located in a lower portion of the pattern unit, and one side of the lower portion of the third region is connected to the fourth region, the first direction is 45° apart from the second direction, the first direction is 135° apart from the third direction, and the first direction and the fourth direction are parallel to each other; When the pattern units are arranged, they are aligned with each other in the horizontal and vertical directions. The upper side of the first area is parallel to and closely adjacent to the lower side of the third area of ​​the upper left pattern unit, the upper side of the second area is parallel to and closely adjacent to the lower side of the fourth area of ​​the upper right pattern unit, the lower side of the second area is parallel to and closely adjacent to the left side of the third area of ​​the right pattern unit, and the right side of the third area is parallel to and closely adjacent to the left side of the fourth area of ​​the right pattern unit. The gaps between the first element boundaries, the second element boundaries, the third element boundaries, the fourth element boundaries, and the gaps between pattern units are all maintained between 0.05 and 0.5 mm; There are blank areas within the pattern units and between adjacent pattern units. The area of ​​the blank areas occupies 6-12% of the area of ​​the pattern units. The third region includes a third region A and a third region B. The third region A is connected between the first region and the fourth region, and the third element in the third region A is continuous with the first element in the first region and the fourth element in the fourth region. The third region B is located to the lower right of the third region A and is offset from the third region A. The first element and the fourth element are both first strip-shaped protrusions protruding outward from the sidewall reference plane, the second element is a second strip-shaped protrusion protruding outward from the sidewall reference plane, and the third element is a third strip-shaped protrusion protruding outward from the sidewall reference plane. The first, second, and third strip-shaped protrusions have the same height, and the width of the first strip-shaped protrusion is ≤ the width of the second strip-shaped protrusion ≤ the width of the third strip-shaped protrusion. The height of the first strip-shaped protrusion, the second strip-shaped protrusion and the third strip-shaped protrusion is 0.2~1mm, the width of the first strip-shaped protrusion, the second strip-shaped protrusion and the third strip-shaped protrusion is 0.1~0.5mm, and the angle between the side wall of the first strip-shaped protrusion, the second strip-shaped protrusion and the third strip-shaped protrusion and the reference plane is 10~35°; the cross-section of the strip-shaped protrusion is triangular or trapezoidal.

2. The tire with enhanced sidewall blackness according to claim 1, characterized in that: The first element, the second element, the third element and the fourth element all extend in a straight line.

3. The tire with enhanced sidewall blackness according to claim 1, characterized in that: The gaps between the first element boundaries are equal, the gaps between the second element boundaries are equal, the gaps between the third element boundaries are equal, and the gaps between the fourth element boundaries are equal.

4. The tire with enhanced sidewall blackness according to claim 1, characterized in that: The gaps between the first element boundaries, the gaps between the second element boundaries, and the gaps between the fourth element boundaries are equal, and the gaps between the third element boundaries are greater than the gaps between the first element boundaries.

5. A tire vulcanization mold for manufacturing a tire with enhanced sidewall blackness according to any one of claims 1 to 4, characterized in that: A reverse pattern filling is provided on the inner surface of the mold at a position corresponding to the marking area of ​​the sidewall. The concave and convex direction of the reverse pattern filling is opposite to that of the pattern filling, so that the pattern filling is formed in the marking area when the tire is vulcanized.

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