Processing method of high-contrast tire, tire mold of high-contrast tire and tire

Abstract

The invention discloses a high-contrast tire machining method, a tire mold and a tire, the method comprises the steps of rough milling, specifically, a first cutter is used for conducting preliminary carving on a to-be-machined area of the tire mold, and rough machining textures are formed; a finish milling step: performing finish trimming on the rough machining texture by using a second cutter so as to form a fine knurling texture with a final shape and size; wherein the radius of the tool nose of the second tool is smaller than that of the tool nose of the first tool. Due to the fact that the R0.12 superfine cutter is adopted and combined with the sectional type engraving technology, the innovative knurling parameter design and the surface grinding treatment, laser engraving is replaced by machining, the high-blackness visual effect is guaranteed, meanwhile, the machining cost is reduced, and the physical strength and the damage resistance of textures are improved.

Description

Technical Field

[0001] This invention relates to the field of tire manufacturing technology, and in particular to a processing method for a high-contrast tire, as well as its tire mold and tire. Background Technology

[0002] The tire sidewall area typically needs to be engraved with brand logos, specifications, and other graphic information to serve as brand identification and information dissemination. To enhance the visual contrast and aesthetics of this graphic information, the industry generally processes the text or decorative patterns on the tire sidewall with specific textured structures.

[0003] Currently, the mainstream technical solutions for achieving the above textures mainly fall into two categories: 1. Machining Textures: This method typically uses a specific shaped tool (such as a diamond-shaped tool) to directly carve regular raised or recessed textures, such as straight lines, curves, or interlaced patterns, onto the surface of the mold cavity. However, this machining method has inherent technical limitations: constrained by tool size (usually not less than R0.20mm) and machining accuracy, the resulting texture structure is relatively coarse, with numerous reflective surfaces on the cut surface. Regardless of adjustments to tool parameters or texture spacing, the surface light reflectivity remains high, resulting in insufficient final blackness.

[0004] 2. Laser Engraving Texture: While lasers can create extremely fine textures, they suffer from low physical strength and are easily damaged. The textures are so fine that even slight bumps or friction during the use, maintenance, cleaning, or handling of the tire mold can cause irreversible physical damage. Furthermore, the extremely dense gaps in the textures make them prone to trapping contaminants that are difficult to remove, increasing maintenance difficulty. In addition, laser engraving equipment is expensive, resulting in high manufacturing costs.

[0005] Therefore, there is an urgent need for a new processing method that can achieve a high-contrast visual effect comparable to laser engraving while ensuring that the graphic information on the tire sidewall has higher texture physical strength, easier maintenance characteristics, and lower overall cost. Summary of the Invention

[0006] The technical problem to be solved by this invention is how to process high-contrast tires while taking into account both high texture physical strength and low manufacturing cost.

[0007] In a first aspect, to solve the above-mentioned technical problems, the present invention provides a method for processing high-contrast tires, the method comprising: Rough milling step: Use the first tool to perform preliminary carving on the area to be machined in the tire mold to form rough machining texture; Finish milling step: Use a second tool to refine the rough texture to form a fine knurled texture with the final shape and size; The tip radius of the second tool is smaller than that of the first tool.

[0008] Furthermore, the tip radius of the second tool is in the range of 0.10mm-0.15mm.

[0009] Furthermore, the tip radius of the first tool is in the range of 0.15mm-0.20mm.

[0010] Furthermore, in the fine milling step, the darkness value of the fine knurling texture is adjusted by controlling the knurling design parameters, wherein the knurling design parameters include tool size, knurling angle, knurling depth, minimum width of adjacent knurling, and knurling spacing.

[0011] Furthermore, the knurling design parameters satisfy the following relationship:

[0012] In the formula, Indicates the knurling spacing, Indicates the knurling angle, Indicates the knurling depth, Indicates the size of the cutting tool. This indicates the minimum width of adjacent knurling.

[0013] Furthermore, the knurling arrangement of the fine knurling texture is directional to convert concentrated specular reflection into diffuse reflection.

[0014] Furthermore, the pattern of the fine knurling texture can be a completely centripetal pattern, a block centripetal pattern, a zigzag pattern, a water ripple pattern, a honeycomb pattern, a plum blossom pattern, a grid pattern, a three-dimensional water ripple pattern, a brick pattern, or a tile pattern.

[0015] Furthermore, after forming the fine knurled texture, the process also includes a step of sanding the surface of the fine knurled texture.

[0016] Furthermore, the abrasive treatment method includes any one of laser texturing, chemical etching, sandblasting, or electrical discharge etching.

[0017] Furthermore, the process parameters for the laser texturing treatment include: The laser wavelength is 1064±10nm; Scanning speed is 10-6000 mm / s; Line spacing: 60-500µm.

[0018] In a second aspect, the present invention provides a tire mold, wherein the fine knurled texture on the tire mold is obtained by the processing method of the high-contrast tire according to any one of claims 1-9.

[0019] In a third aspect, the present invention provides a tire, wherein the tire sidewall has graphic information formed by the tire mold of claim 10, and the graphic information area is provided with the fine knurled texture.

[0020] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: This invention utilizes an R0.12 ultra-fine cutting tool combined with a segmented engraving process, innovative knurling parameter design, and surface sanding treatment to achieve machining instead of laser engraving. This reduces processing costs while ensuring a high-blackness visual effect and improving the physical strength and damage resistance of the texture. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure disclosed in this invention, which involves rough milling followed by finish milling. Figure 2 This is a schematic diagram of the knurling design parameters disclosed in this invention; Figure 3 This is a schematic diagram of the structure of the fine knurled texture pattern disclosed in the embodiments of the present invention, which is a completely centripetal pattern; Figure 4 This is a schematic diagram of the structure of the fine knurled texture pattern as a block-centric pattern disclosed in the embodiments of the present invention; Figure 5 This is a schematic diagram of the structure of the fine knurled texture pattern of the present invention, which is a 40° zigzag pattern; Figure 6 This is a schematic diagram of the structure of the fine knurled texture pattern of the present invention, which is a 70° zigzag pattern; Figure 7 This is a schematic diagram of the structure of the fine knurled texture pattern of the present invention, which is a 100° zigzag pattern. Figure 8 This is a schematic diagram of the structure of the fine knurled texture pattern of the present invention, which is a 130° zigzag pattern; Figure 9 This is a schematic diagram of the structure of the fine knurled texture pattern as a vertical water ripple pattern disclosed in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the fine knurled texture pattern as a horizontal water ripple pattern disclosed in an embodiment of the present invention; Figure 11This is a schematic diagram of the honeycomb pattern of fine knurled texture disclosed in an embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of the fine knurled texture pattern as a plum blossom pattern disclosed in an embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of the fine knurled texture pattern as a grid pattern disclosed in an embodiment of the present invention; Figure 14 This is a schematic diagram of the structure of the fine knurled texture pattern as a three-dimensional water ripple pattern disclosed in the embodiments of the present invention; Figure 15 This is a schematic diagram of the structure of the fine knurled texture pattern as a brickwork pattern disclosed in the embodiments of the present invention; Figure 16 This is a schematic diagram of the structure of the fine knurled texture pattern as a tile pattern disclosed in an embodiment of the present invention; Figure 17 This invention discloses the relationship between the knurled cross-sectional structure and light reflection in three different forms. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The present invention aims to provide a processing method for high-contrast tires, which can ensure that the tire sidewall graphic information achieves a high-contrast visual effect comparable to laser engraving, while having higher texture physical strength, simpler maintenance characteristics, and lower overall cost.

[0025] Please see Figure 1 This invention pioneers a segmented engraving method, which involves rough milling followed by fine milling. Its main steps include: Rough milling step: Use the first tool to perform preliminary carving on the area to be machined in the tire mold to form rough machining texture.

[0026] Finish milling step: Use a second tool to refine the rough texture to form a fine knurled texture with the final shape and size.

[0027] The tip radius of the second tool is smaller than that of the first tool. Preferably, the tip radius of the first tool is in the range of 0.15mm-0.20mm. The tip radius of the second tool is in the range of 0.10mm-0.15mm, preferably 0.12mm.

[0028] In the segmented carving method, the tool size is R0.20→R0.15→R0.12, the machining angle is 40°, and the machining depth is 0.2mm-0.5mm.

[0029] The segmented engraving method, which involves rough milling followed by finish milling, allows for the creation of finer knurling and provides a pre-existing path that approximates the final shape. During finish machining, the ultra-fine R0.12 tool essentially follows this path, resulting in more balanced lateral forces, significantly reducing radial runout and vibration, and making the machining process smoother. This avoids the problem of breakage when engraving with ultra-fine R0.12 tools.

[0030] Please see Figure 2 In the finish milling process, the darkness value of the fine knurling texture is adjusted by controlling the knurling design parameters. These parameters include tool size, knurling angle, knurling depth, minimum width between adjacent knurling sections, and knurling spacing. These knurling design parameters satisfy the following relationship:

[0031] In the formula, Indicates the knurling spacing. Indicates the knurling angle. Indicates the depth of knurling. Indicates the size of the cutting tool. This indicates the minimum width of adjacent knurling.

[0032] Please see Figure 3-16 The text lists various fine knurling patterns, including fully centripetal patterns, block-centric patterns, zigzag patterns, water ripple patterns, honeycomb patterns, plum blossom patterns, grid patterns, three-dimensional water ripple patterns, brickwork patterns, and tile patterns. Among these, the knurling arrangement of fine knurling is directional, used to convert concentrated specular reflection into diffuse reflection.

[0033] Specifically: Completely concentric lines: The distance between the concentrically arranged straight lines and the concentrically arranged straight lines in the center of the engraved area are equal. The completely concentric arrangement is the smallest distance at the bottom of the font, and the distance gradually increases outwards.

[0034] Centripetal pattern: The center lines of the engraved area are arranged concentrically, and the remaining lines are arranged at equal intervals to ensure that the spacing between adjacent knurling is equal in any vertical direction.

[0035] 40° Zigzag Pattern: A line at a 40° angle radiates outwards from the center of the engraved area, while the remaining zigzag lines maintain a 40° angle and are equidistant along the circumference, ensuring that the knurling spacing between adjacent sections is constant in any longitudinal section.

[0036] 70° Zigzag Pattern: A line at a 70° angle radiates outwards from the center of the engraved area, while the remaining zigzag lines maintain a 70° angle and are equidistant along the circumference, ensuring that the knurling spacing between adjacent sections is constant in any longitudinal section.

[0037] 100° Zigzag Pattern: A line at a 40° angle radiates outwards from the center of the engraved area, while the remaining zigzag lines maintain a 100° angle and are equidistant along the circumference, ensuring that the knurling spacing between adjacent sections is constant in any longitudinal section.

[0038] 130° Zigzag Pattern: A line at a 40° angle radiates outwards from the center of the engraved area, while the remaining zigzag lines maintain a 130° angle and are equidistant along the circumference, ensuring that the knurling spacing between adjacent sections is constant in any longitudinal section.

[0039] Vertical water ripples: The vertical wavy lines themselves are formed by connecting the beginning and end of circular arcs with R=0.5–2mm, and are evenly spaced along the horizontal direction; the result is parallel "liquid columns", each column has its own micro-arc undulations, which look like water flow from a distance and micro-fish scale light bands up close.

[0040] Horizontal water ripples: The horizontal wavy lines are formed by connecting the ends of circular arcs with a radius of R=0.5–2mm, and are arranged at equal intervals along the vertical direction; forming a row of parallel "horizontal water ripple bands", which look like layers of ripples from a distance, and each texture looks like a micro-arc scale when viewed up close, combining horizontal rhythm and vertical cadence.

[0041] Honeycomb pattern: It is composed of countless equally sized regular hexagonal units, forming a continuous geometric texture like a honeycomb.

[0042] Plum blossom pattern: The smallest unit is the "curved petal" - each petal is outlined by a continuous arc with soft edges and no sharp corners; the unit size can be scaled up or down according to design requirements, so as to achieve two visual rhythms on the same mold: "dense small flowers" or "sparse large flowers".

[0043] Grid pattern: Horizontal and vertical straight lines are equidistant and orthogonal, interwoven to form a regular grid.

[0044] Three-dimensional water ripples: vertical rigid lines and horizontal soft waves (or horizontal straight lines and vertical soft waves) are interwoven at equal intervals - the cold vertical ribs are penetrated by the undulating water ripples, forming a texture of rigidity and softness that is like "ice pillars around water".

[0045] Brickwork pattern: Horizontal and vertical straight lines are equidistant but staggered by half a spacing, forming a "brick joint" interlaced grid.

[0046] Tile pattern: Horizontal straight lines and arcs are arranged in a staggered manner, with equal spacing in both the horizontal and vertical directions, forming a "rigid ruler water pattern" - the horizontal cold grid is penetrated by the undulating arcs layer by layer in a staggered manner, which looks orderly from a distance and flows with light up close.

[0047] In a further embodiment, after forming the fine knurled texture, a frosting process is also included to increase the surface roughness of the texture and further enhance the blackness effect through diffuse reflection.

[0048] like Figure 17 As shown, surfaces with high reflectivity reflect more light, thus appearing brighter. Surfaces with low reflectivity reflect less light, thus appearing darker. Therefore, reducing reflectivity makes an object appear darker. By combining the principles of light reflection with the knurled cross-sectional structure, the relevant parameters of the knurling design can be adjusted appropriately. Furthermore, increasing the surface roughness is equivalent to converting specular reflection into diffuse reflection. Diffuse reflection scatters light evenly in all directions, reducing the amount of light reaching the human eye at a fixed position, further enhancing the blackness effect.

[0049] The methods of sanding include laser texturing, chemical etching, sandblasting or electrical discharge etching, EDM, 3D printing, mirror polishing, plasma surface activation, nano-coating deposition, semiconductor photolithography, etc.

[0050] The process parameters for laser texturing are shown in Table 1 below: Table 1

[0051] The comparison data of this invention with existing technologies in terms of cost and blackness value are shown in Table 2 below: Table 2

[0052] It is evident that, compared to existing technologies that use laser engraving to create fine textures with a spacing of 0.2mm and machining to create fine textures with a spacing of approximately 0.5mm, this invention enhances the strength of the knurling process in both processing and application. This is because machining with mechanical tools increases the strength of the mold decorative lines through "work hardening" and the formation of favorable residual compressive stress during the cold working process; while laser engraving, due to "hot working," creates a "heat-affected zone," which may lead to material softening, microcracks, and unfavorable tensile stress, thereby potentially weakening the strength.

[0053] The present invention also protects a tire mold, wherein the fine knurled texture on the tire mold is obtained by the above-described processing method.

[0054] In addition, the present invention also protects a tire, the sidewall of which has graphic information formed by the above-mentioned tire mold, and the graphic information area is provided with fine knurled texture with high contrast.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for processing a high-contrast tire, characterized in that, The method includes: Rough milling step: Use the first tool to perform preliminary carving on the area to be machined in the tire mold to form rough machining texture; Finish milling step: Use a second tool to refine the rough texture to form a fine knurled texture with the final shape and size; The tip radius of the second tool is smaller than that of the first tool.

2. The processing method for high-contrast tires according to claim 1, characterized in that, The tip radius of the second tool is in the range of 0.10mm-0.15mm.

3. The processing method for high-contrast tires according to claim 1, characterized in that, The tip radius of the first tool is in the range of 0.15mm-0.20mm.

4. The processing method for high-contrast tires according to claim 1, characterized in that, In the fine milling step, the blackness value of the fine knurling texture is adjusted by controlling the knurling design parameters, which include tool size, knurling angle, knurling depth, minimum width of adjacent knurling, and knurling spacing.

5. The processing method for high-contrast tires according to claim 4, characterized in that, The knurling design parameters satisfy the following relationship: In the formula, Indicates the knurling spacing, Indicates the knurling angle, Indicates the knurling depth, Indicates the size of the cutting tool. This indicates the minimum width of the adjacent knurling.

6. The processing method for high-contrast tires according to claim 1, characterized in that, The knurling of the fine knurled texture is directional, so as to convert concentrated specular reflection into diffuse reflection.

7. The processing method for high-contrast tires according to claim 1, characterized in that, The fine knurled texture pattern can be a completely centripetal pattern, a block centripetal pattern, a zigzag pattern, a water ripple pattern, a honeycomb pattern, a plum blossom pattern, a grid pattern, a three-dimensional water ripple pattern, a brick pattern, or a tile pattern.

8. The processing method of the high-contrast tire according to any one of claims 1-7, characterized in that, After forming the fine knurled texture, the process also includes a step of sanding the surface of the fine knurled texture.

9. The processing method for a high-contrast tire according to claim 8, characterized in that, The abrasive treatment method includes any one of laser texturing, chemical etching, sandblasting, or electrical discharge etching.

10. The processing method for a high-contrast tire according to claim 9, characterized in that, The process parameters for the laser texturing process include: The laser wavelength is 1064±10nm; Scanning speed is 10-6000 mm / s; Line spacing: 60-500µm.

11. A tire mold, characterized in that, The fine knurling texture on the tire mold is obtained by the processing method of the high-contrast tire according to any one of claims 1-10.

12. A tire, characterized in that, The tire sidewall has graphic information formed by the tire mold of claim 11, and the graphic information area is provided with the fine knurled texture.

Images