White character tire mold structure convenient for character grinding

Abstract

The utility model relates to the field of tire molds, in particular to a white character tire mold structure convenient for character grinding. The white character tire mold structure facilitating character grinding comprises a mold inner cavity, the mold inner cavity is provided with a forming cavity and a character cavity, the character cavity is provided with a character filling area and a rubber extrusion area, and the mold inner cavity is further provided with a rubber overflow groove. According to the utility model, through the arrangement of the sizing material extrusion area, the font sectional area and the edge sizing material filling amount are increased, more surplus is provided for grinding white fonts, the white fonts are clearly displayed after grinding, and the fonts are prevented from being incomplete or damaged; in addition, a glue overflowing groove is formed, extrusion glue accumulation is prevented, the groove is firstly filled with the glue, the glue overflowing groove protrudes out of the font, subsequent grinding is facilitated, and the definition and quality of the white font are further guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of tire molds, and specifically to a white-letter tire mold structure facilitating font grinding. Background Art

[0002] In the tire manufacturing industry, white-letter tires, as products with significant identifiability and aesthetics, are very popular in the market. During their production, to ensure that the protruding fonts on the tire sidewall can be clearly and accurately presented in white, a method of designing specific-shaped font grooves in the mold and injecting white rubber material is usually adopted. After the tire is formed, the protruding fonts on the tire sidewall are then ground to expose the white rubber material, so as to ensure that the fonts are presented in white. However, there are some problems in the current design of white-letter tire molds: during the tire vulcanization process, since the tire mold is circular, the curvature of the mold is larger closer to the center of the circle. Affected by the curvature during the rubber material filling process, the rubber material is prone to extrusion and accumulation in the area with a larger curvature. Therefore, the closer to the center of the circle at the lower end of the font, the easier it is to cause mutual extrusion and accumulation between different rubber materials. This extrusion and accumulation phenomenon often leads to non-white rubber material mistakenly filling the font space that should be filled with white rubber material. Therefore, during the subsequent font grinding process, the white rubber material cannot be successfully exposed at some positions, thus affecting the overall aesthetics and product quality of the white-letter tires. Therefore, it is necessary to design a white-letter tire mold structure facilitating font grinding to solve the problem of extrusion and accumulation of different rubber materials in the mold font grooves, which results in the inability to grind out white rubber at some positions of the font during subsequent polishing and affects the aesthetics of the white letters. Content of the Utility Model

[0003] Aiming at the problem of how to prevent the extrusion and accumulation of different rubber materials in the mold font grooves during the manufacturing process of white-letter tires in the above-mentioned existing technology, which results in the inability to fully present in white after the font is polished, the technical solution adopted by the utility model to solve its technical problems is:

[0004] A white-letter tire mold structure facilitating font grinding, including a mold inner cavity, wherein the mold inner cavity is provided with a forming cavity for product forming, a font cavity located on one side of the forming cavity. The font cavity is provided with a font filling area and a rubber material extrusion area adjacent to the font filling area. The mold inner cavity is further provided with an overflow groove away from the forming cavity and connected to the font cavity.

[0005] Further, in the white-letter tire mold structure of the solution, the font cavity is further provided with a first inner wall connected to the forming cavity and arranged at an angle. The rubber material extrusion area is located between the first inner wall and the font filling area, and the cross-section of the font cavity is trapezoidal.

[0006] Further, in a white tire mold structure facilitating font grinding described in the solution, the first inner wall is arranged at an angle α with the forming cavity, and the angle α is between 70° and 80°.

[0007] Further, in a white tire mold structure facilitating font grinding described in the solution, the font cavity further has a second inner wall on the side away from the forming cavity, and the glue overflow groove is located on one side of the second inner wall.

[0008] Further, in a white tire mold structure facilitating font grinding described in the solution, the glue overflow groove has a first groove wall connected to the font cavity and a second groove wall connecting multiple first groove walls, and the cross-section of the glue overflow groove is trapezoidal.

[0009] Further, in a white tire mold structure facilitating font grinding described in the solution, the second groove wall is connected to the second inner wall, and the extension line of the second groove wall and the second inner wall is arranged at an angle β, and the angle β is between 80° and 88°.

[0010] Further, in a white tire mold structure facilitating font grinding described in the solution, the width of the font cavity in cross-section is s1, the lower width of the cross-section of the glue overflow groove is s2, and the maximum length of s2 is less than half of the length of s1.

[0011] Further, in a white tire mold structure facilitating font grinding described in the solution, the height of the font cavity in cross-section is h1, the height of the cross-section of the glue overflow groove is h2, and h2 is between two-thirds and four-fifths of h1.

[0012] Further, in a white tire mold structure facilitating font grinding described in the solution, the angle α is 75°, and the angle β is 87°.

[0013] Further, in a white tire mold structure facilitating font grinding described in the solution, the height h2 is three-fourths of h1.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The utility model effectively increases the cross-sectional area of the font and the amount of glue filling at the edge by adding a glue extrusion area at the edge of the font filling area. This setting provides more margin for the subsequent treatment of grinding the white font, ensuring that the white font can be clearly shown after removing the extruded glue on the glue extrusion area during the grinding process, and at the same time avoiding the problem of incomplete or defective font caused by insufficient glue. In addition, the setting of the overflow groove can effectively prevent the extruded glue from accumulating around the font, making the extruded glue first fill into the overflow groove. Since the overflow groove protrudes above the font, it is convenient for subsequent grinding treatment, further ensuring the clarity and quality of the white font.

[0016] The following will further illustrate the present utility model in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a partial cross-sectional schematic view of a white letter tire mold structure for facilitating font grinding according to the present utility model.

[0018] Figure 2 FIG. is a partial cross-sectional schematic view of a white letter tire mold structure for facilitating font grinding according to the present utility model.

[0019] Figure 3 FIG. is a partial cross-sectional schematic view of the original mold structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will make a detailed description of the embodiments of the present utility model in conjunction with the drawings.

[0021] As Figure 1 and Figure 2 shown, a white letter tire mold structure for facilitating font grinding includes a mold inner cavity, wherein the mold inner cavity is provided with a forming cavity 1 for product forming, a font cavity 2 located on one side of the forming cavity 1. The font cavity 2 is provided with a font filling area 23 and a glue extrusion area 24 adjacent to the font filling area 23. The mold inner cavity is further provided with an overflow groove 3 that is far from the forming cavity 1 and connected to the font cavity 2.

[0022] The utility model effectively increases the cross-sectional area of the font and the amount of glue filling at the edge by adding a glue extrusion area 24 at the edge of the font filling area 23. This setting provides more margin for the subsequent treatment of grinding the white font, ensuring that the white font can be clearly shown after removing the extruded glue on the glue extrusion area 24 during the grinding process, and at the same time avoiding the problem of incomplete or defective font caused by insufficient glue. In addition, the setting of the overflow groove 3 can effectively prevent the extruded glue from accumulating around the font, making the extruded glue first fill into the overflow groove 3. Since the overflow groove 3 protrudes above the font, it is convenient for subsequent grinding treatment, further ensuring the clarity and quality of the white font.

[0023] Specifically, the utility model increases a rubber extrusion area 24 at the edge of the font filling area 23, aiming to increase the filling margin at the font edge. Since the extrusion of white rubber and other rubbers generally occurs at the font edge, adding the rubber extrusion area 24 at the font edge provides a specific area for the extrusion and accumulation of rubber, ensuring that the rubber is extruded and accumulated in this area, and the extruded rubber will stay in the rubber extrusion area 24 without affecting the white rubber in the font filling area 23. Thus, it ensures that during the subsequent grinding process, without affecting the font filling area 23, there is sufficient margin to grind the font to clearly highlight the outline of the white font; further, by providing an overflow groove 3 on the side of the font cavity 2 away from the forming cavity 1, it can effectively prevent the rubber from excessively accumulating at the font edge, ensuring that the extruded rubber is first filled in the overflow groove 3 and thus effectively collected for subsequent grinding treatment. This setting not only simplifies the subsequent grinding process, reduces the grinding difficulty, but also further reduces the extrusion phenomenon at the font edge, ensuring the clarity and quality of the white font.

[0024] Furthermore, as Figures 1 - 3 shown in a white letter tire mold structure facilitating font grinding, wherein the font cavity 2 further has a first inner wall 21 connected to the forming cavity 1 and arranged at an angle, the rubber extrusion area 24 is located between the first inner wall 21 and the font filling area 23, and the cross-section of the font cavity 2 is trapezoid-shaped.

[0025] The utility model sets a first inner wall 21 connected to the forming cavity 1 in the font cavity 2 and arranges it at an angle, so that a chamfer is formed at the connection between the font cavity 2 and the forming cavity 1. This chamfer setting makes the edge of the font have an inclined angle after forming. In the traditional mold structure, the font edge is perpendicular to the forming cavity 1. After the font is formed, the traditional mold requires a lot of time and effort to grind the uneven part of the edge to ensure the clarity and beauty of the white font. Through this chamfer setting, the operator can more quickly and easily identify and grind the rubber extrusion area 24 because the inclined angle of the chamfer makes the rubber extrusion area 24 more obvious, and provides a better grinding angle and path for the operator, reducing the time and effort required for grinding and improving the production efficiency; further, the cross-section of the font cavity 2 is trapezoid-shaped, which enables the rubber to flow into the font cavity 2 more smoothly through the gradually changing flow space, thereby improving the overall quality of font forming; further, the setting of the first inner wall 21 can better guide the extruded rubber to flow into the overflow groove 3 and the rubber extrusion area 24 along the first inner wall 21, preventing the extruded rubber from entering the font filling area 23.

[0026] Furthermore, as Figure 1 andFigure 2 A white tire mold structure facilitating font grinding is shown, wherein the first inner wall 21 and the forming cavity 1 are arranged at an angle α, and the angle α is between 70° and 80°.

[0027] In the present utility model, the included angle α between the first inner wall 21 and the forming cavity 1 is set between 70° and 80°. This setting optimizes the flow path and pressure distribution of the rubber compound, enabling the rubber compound to enter the font cavity 2 through a larger flow space and providing a certain pressure to prevent the rubber compound from flowing too fast or too slow, ensuring that the rubber compound flows more smoothly and steadily during the flow process, thereby improving the quality and aesthetics of the font. Further, when the angle α is greater than 80°, the flow of the rubber compound will be too rapid, resulting in uneven filling of the rubber compound in the font cavity 2, with bubbles and defects occurring. When the angle is less than 70°, the flow of the rubber compound will be subject to excessive resistance, causing excessive accumulation of the rubber compound in the font cavity 2 during the molding process, increasing the difficulty and time of subsequent grinding.

[0028] Further, as Figure 1 A white tire mold structure facilitating font grinding is shown, wherein the font cavity 2 further has a second inner wall 22 on the side away from the forming cavity 1, and the overflow groove 3 is located on one side of the second inner wall 22.

[0029] In the present utility model, the overflow groove 3 is located on the side of the font cavity 2 away from the forming cavity 1. Since the height of the overflow groove 3 is higher than that of the font cavity 2, the excess extruded rubber compound during the molding process will first fill the overflow groove 3. This setting makes the extruded rubber compound overflowing after molding protrude above the font, enabling the operator to more easily identify and handle the overflowing rubber compound during the grinding operation. Further, this setting not only reduces the grinding amount and polishing difficulty of the font itself but also ensures the clarity and integrity of the font, improving the production efficiency.

[0030] Further, as Figure 1 A white tire mold structure facilitating font grinding is shown, wherein the overflow groove 3 is provided with a first groove wall 31 connected to the font cavity 2 and a second groove wall 32 connecting a plurality of the first groove walls 31, and the cross-section of the overflow groove 3 is trapezoidal.

[0031] In the present utility model, the cross-section of the overflow groove 3 is trapezoidal. In this embodiment, the overflow groove 3 has a larger entrance, providing a larger transition surface, thereby effectively reducing the resistance and retention phenomenon of the rubber compound during the flow process. Through this setting, the rubber compound can be quickly guided into the overflow groove 3, effectively reducing the accumulation phenomenon of the extruded rubber compound around the font cavity and ensuring the clarity and quality of the font molding.

[0032] Further, as Figure 1 and Figure 2A white tire mold structure facilitating font grinding is shown, where the second groove wall 32 is connected to the second inner wall 22, and the extension lines of the second groove wall 32 and the second inner wall 22 are set at an angle β, and the angle β is between 80° and 88°.

[0033] In the present utility model, the included angle β between the extension lines of the second groove wall 32 and the second inner wall 22 is set between 80° and 88°. This setting makes the overflow groove 3 have a larger entrance, so that the overflow groove 3 can collect the extruded rubber material to the maximum extent while ensuring the smooth flow of the rubber material, thereby reducing the possibility of the extruded rubber material accumulating around the font cavity 2 and further improving the product quality. Further, if the angle is less than 80°, the rubber material will encounter greater resistance when entering the overflow groove 3, resulting in unsmooth flow, thus increasing the risk of the rubber material accumulating around the font cavity 2. If the angle is greater than 88°, the overflow groove 3 lacks a guiding effect at a certain angle and it will be difficult to guide the inflow of the extruded rubber material, which will also cause the rubber material to accumulate around the font. Both situations will increase the difficulty and time of subsequent grinding treatment.

[0034] Further, as Figure 2 A white tire mold structure facilitating font grinding is shown, where the width of the font cavity 2 in cross-section is s1, and the lower width of the overflow groove 3 in cross-section is s2, and the maximum length of s2 is less than half of the length of s1.

[0035] In the present utility model, the maximum length of s2 is less than half of the length of s1. This setting ensures that the capacity of the overflow groove 3 is sufficient to collect a large amount of extruded rubber material and excess rubber material, while reducing the cost of the mold, enabling the overflow groove 3 to not only prevent the extrusion and accumulation of the rubber material at the font edge, but also not occupy too much mold space, thereby reducing the manufacturing cost of the mold. Further, if the maximum length of s2 is greater than half of the length of s1, the overflow groove 3 will occupy more mold space, increasing the manufacturing cost of the mold. At the same time, the too-wide overflow groove 3 will cause the extruded rubber material and excess rubber material to be overly dispersed when flowing into the overflow groove 3 and unable to be effectively concentrated, which may instead cause the rubber material to flow back and affect the molding quality. In addition, the too-wide overflow groove 3 will also increase the workload of subsequent grinding, further increasing the production cost and time.

[0036] Further, as Figure 2 A white tire mold structure facilitating font grinding is shown, where the height of the font cavity 2 in cross-section is h1, and the height of the overflow groove 3 in cross-section is h2, and h2 is between two-thirds and four-fifths of h1.

[0037] In the present utility model, h2 is between two-thirds and four-fifths of h1. This setting can effectively reduce the cost of the mold while ensuring that the overflow groove 3 has sufficient capacity to collect a large amount of extruded rubber material and excess rubber material, preventing the extrusion and accumulation of the rubber material at the font edge and thus affecting the font filling area 23. Further, if h2 is greater than four-fifths of h1, the overflow groove 3 will be too deep, increasing the material consumption and manufacturing cost of the mold. If h2 is less than two-thirds of h1, the capacity of the overflow groove 3 will be insufficient, unable to effectively collect the excess rubber material, resulting in the extrusion and accumulation of the rubber material at the font edge, affecting the clarity and quality of the font forming, and increasing the difficulty and cost of subsequent grinding and processing.

[0038] Further, as Figure 2 shown in a white tire mold structure facilitating font grinding, wherein the angle α is 75° and the angle β is 87°.

[0039] In the present utility model, the angle α is 75° and the angle β is 87°. This setting has a significant effect on preventing the accumulation and extrusion of the rubber material. Further, this angle setting can not only ensure that the rubber material is effectively guided and collected in the font cavity 2 and the overflow groove 3 during the forming process, but also prevent the rubber material from flowing back and being overly dispersed. When the angle α is 75°, the inclination angle between the forming cavity 1 and the first inner wall 21 of the font cavity 2 enables the rubber material to be more smoothly distributed and filled during the process of flowing into the font cavity 2, thereby improving the forming quality and clarity of the font. At the same time, when the angle β is 87°, the angle setting between the second groove wall 32 and the extension line of the second inner wall 22 enables the extruded rubber material and the excess rubber material to more smoothly enter the overflow groove 3, also reducing the problem of the rubber material accumulating at the font edge.

[0040] Further, as Figure 2 shown in a white tire mold structure facilitating font grinding, wherein the height h2 is three-fourths of h1.

[0041] In the present utility model, the height h2 is set to three-fourths of h1, ensuring that the overflow groove 3 has sufficient capacity to collect a large amount of extruded rubber material and excess rubber material, enabling the large amount of extruded rubber material and excess rubber material to smoothly flow into the overflow groove 3 without forming excessive accumulation and extrusion at the font edge, thus ensuring the clarity and forming quality of the font. Further, this setting avoids the waste of space caused by the excessive depth of the overflow groove 3, thereby effectively controlling the manufacturing cost of the mold.

[0042] Further, as Figure 1 shown in a white tire mold structure facilitating font grinding, wherein at least one first groove wall 31 of the overflow groove 3 is connected to the first inner wall 21.

[0043] In the present utility model, at least one first groove wall 31 of the overflow glue groove 3 is connected to the first inner wall 21, and the first groove wall 31 of the overflow glue groove 3 is directly and overly connected to the first inner wall 21 of the font cavity 2, so that the overflow glue groove 3 is located on one side of the font cavity 2. This setting effectively reduces the complexity and manufacturing cost of the mold, simplifies the structure of the mold, and thus reduces the production cost. Further, this setting can also optimize the flow path of the glue material, ensure that the extruded glue material can more smoothly enter the overflow glue groove 3 along the first inner wall 21, and further avoid the accumulation and extrusion of the glue material at the font edge, thereby improving the quality and clarity of the font forming.

[0044] As Figures 1 - 3 shown, the implementation manner of this embodiment is as follows:

[0045] Embodiment 1:

[0046] The inner cavity of the mold is provided with a forming cavity 1 for product forming and a font cavity 2 located on one side of the forming cavity 1. The font cavity 2 includes a font filling area 23 and a glue material extrusion area 24, and the side of the font cavity 2 far from the forming cavity 1 is communicated with the overflow glue groove 3. The first inner wall 21 on the font cavity 2 is arranged at an α angle with the forming cavity 1, and at least one first inner wall 21 on the font cavity 2 is overly connected to the first groove wall 31 on the overflow glue groove 3, and the second groove wall 32 is arranged at a β angle with the extension line of the second inner wall 22 on the font cavity 2. The maximum length of the lower width s2 of the cross section of the overflow glue groove 3 is less than half of the length of the upper width s1 of the cross section of the font cavity 2. In this embodiment, the α angle is 70°, the β angle is 80°, and the cross section height h1 of the font cavity 2 is two-thirds of the cross section height h2 of the overflow glue groove 3.

[0047] During the forming process, first fill the white glue material into the font cavity 2 through the injection port, and then inject the glue material for tire forming into the forming cavity 1. The black glue material will fill the main part of the mold, and most of the black glue material will not flow into the font cavity 2 that has been filled with the white glue material. A small part will flow into the font cavity 2 along the first inner wall 21 and be mixed and extruded with the white glue material. As the amount of the injected black glue material gradually increases, a part of the mixed and extruded glue material that is extruded on the first inner wall 21 will first enter the overflow glue groove 3 along the first inner wall 21 through the glue material extrusion area 24 for extrusion and accumulation, and the excess mixed and extruded glue material will remain on the first inner wall 21 and be extruded and accumulated in the glue material extrusion area 24, so as to ensure that the glue material in the font filling area 23 is white and not contaminated. Finally, grind the font to remove the extruded glue material formed on the glue material extrusion area 24 and the overflow glue groove 3, and complete the forming of the white characters on the tire.

[0048] Embodiment 2:

[0049] The mold structure and the molding steps are the same as those in the first embodiment, but in this embodiment, the α angle is 80°, the β angle is 88°, and the cross-sectional height h1 of the font cavity 2 is four-fifths of the cross-sectional height h2 of the overflow groove 3.

[0050] Embodiment 3:

[0051] The mold structure and the molding steps are the same as those in the first embodiment, but in this embodiment, the α angle is 75°, the β angle is 87°, and the cross-sectional height h1 of the font cavity 2 is three-fourths of the cross-sectional height h2 of the overflow groove 3.

[0052] The above only further illustrates the technical content of the present invention with embodiments to make it easier for readers to understand, but it does not mean that the implementation modes of the present invention are limited to this. Any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A white tire mold structure facilitating font grinding, including a mold inner cavity, characterized in that: The inner cavity of the mold is provided with a forming cavity (1) for product forming and a font cavity (2) located on one side of the forming cavity (1). The font cavity (2) is provided with a font filling area (23) and a rubber material extrusion area (24) adjacent to the font filling area (23). The inner cavity of the mold is also provided with an overflow groove (3) that is far away from the forming cavity (1) and is connected to the font cavity (2).

2. The structure of a white tire mold facilitating font grinding according to claim 1, wherein: The font cavity (2) is also provided with a first inner wall (21) that is connected to the forming cavity (1) and is arranged at an angle. The rubber material extrusion area (24) is located between the first inner wall (21) and the font filling area (23). The cross-section of the font cavity (2) is trapezoidal.

3. The structure of a white tire mold facilitating font grinding according to claim 2, characterized in that: The first inner wall (21) and the forming cavity (1) are arranged at an angle α, and the angle α is between 70° and 80°.

4. The structure of a white tire mold facilitating font grinding according to claim 3, characterized in that: The font cavity (2) is also provided with a second inner wall (22) on the side far away from the forming cavity (1). The overflow groove (3) is located on one side of the second inner wall (22).

5. The structure of a white tire mold facilitating font grinding according to claim 4, characterized in that: The overflow groove (3) is provided with a first groove wall (31) connected to the font cavity (2) and a second groove wall (32) connecting a plurality of the first groove walls (31). The cross-section of the overflow groove (3) is trapezoidal.

6. The structure of a white tire mold facilitating font grinding according to claim 5, characterized in that: The second groove wall (32) is connected to the second inner wall (22), and the second groove wall (32) and the extension line of the second inner wall (22) are arranged at an angle β, and the angle β is between 80° and 88°.

7. The structure of the white tire mold facilitating font grinding according to claim 1, characterized in that: The width of the cross-section of the font cavity (2) is s1, and the lower width of the cross-section of the overflow groove (3) is s2. The maximum length of s2 is less than half of the length of s1.

8. The structure of a white tire mold facilitating font grinding according to claim 1, characterized in that: The height of the cross-section of the font cavity (2) is h1, and the height of the cross-section of the overflow groove (3) is h2. h2 is between two-thirds and four-fifths of h1.

9. The structure of a white-letter tire mold facilitating font grinding according to claim 6, characterized in that: The angle α is 75°, and the angle β is 87°.

10. A white tire mold structure facilitating font grinding according to claim 8, characterized in that: The height h2 is three-fourths of h1.

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