Tire mold for forming atypical sidewall pattern and tire manufactured using same

Abstract

The invention relates to the field of tires for vehicles, in particular to a tire mold with at least one atypical pattern unit forming part and a tire manufactured by using the tire mold. The tire mold of the present invention includes a plurality of basic pattern unit forming portions (110, 120, 130) disposed in a region of the tire mold corresponding to a marking region of a side wall, in which the basic pattern unit forming portions are formed by a plurality of right-angled recesses when viewed from a surface of the tire mold, and the plurality of right-angle concave parts are asymmetrically arranged in the horizontal direction and the vertical direction on the whole, so that the visibility of marks in the mark area of the side wall of the tire is greatly improved.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2023-0082616, filed on Jun. 27, 2023, which is hereby incorporated by reference in its entirety. Technical Field

[0003] The present invention relates to the field of vehicle tires, and more particularly to a tire mold for forming an atypical / non-shaped / irregular / special pattern with excellent visibility on a tire sidewall and a tire manufactured using the tire mold. Background Art

[0004] Generally speaking, if Figure 1 As shown, the tire body includes: a tread 11, which is a thick rubber layer that is in direct contact with the road surface; and a shoulder 12, which forms the shoulder portion of the tire and has the largest thickness; a sidewall 13, which enables the side of the tire to perform flexible bending movements, thereby improving driving comfort, and is engraved with markings to indicate the tire model, specifications, logo, manufacturer name and other markings; and a bead 14, which wraps the end of the cord so that the tire is stably mounted on the rim.

[0005] The mark engraved on the sidewall is formed by a tire mold, and the tire mold has a concave structure on its surface so as to have a pattern structure corresponding to the tire surface through vulcanization.

[0006] Tires are basically black, but the markings engraved on the sidewalls need to have a contrast with their surroundings, so-called good visibility, so that they can be easily seen by the naked eye.

[0007] In order to improve the visibility of the mark engraved on the tire sidewall, a method of forming a plurality of fine uniform concave and convex parts in the mark area of ​​the sidewall has been conventionally proposed (Patent Document 1). This technology aims to cause diffuse reflection by forming uneven concave and convex parts in the mark area of ​​the tire sidewall. However, since this technology does not process the pattern but changes the type of metal or changes the concave and convex of the surface, there is a great limitation in improving the visibility of the mark.

[0008] In addition, there is a technology for enhancing the visibility of a mark by providing a protruding pattern unit having a curved portion on the side wall (Patent Document 2). However, since this technology is still a method of arranging the protruding pattern units, a relatively wide space is formed between the protruding pattern units, making it difficult to expect the visibility of the mark to be improved as expected.

[0009] [Prior art literature]

[0010] [Patent Document]

[0011] (Patent Document 1) Patent Document 1: Korean Patent Publication No. 10-2007-0042679

[0012] (Patent Document 2) Patent Document 2: Korean Patent Publication No. 10-2020-0131291 Summary of the invention

[0013] In view of the above circumstances, an object of the present invention is to provide a tire mold including a plurality of atypical pattern unit forming portions arranged in a marking area of ​​a marking to improve visibility of a marking engraved on a tire sidewall.

[0014] Another object of the present invention is to provide a tire having a series of protruding pattern element arrangement structures matching an atypical pattern element forming portion manufactured using the tire mold.

[0015] In order to achieve the above-mentioned purpose, the technical idea of ​​the present invention relates to a pattern structure, which is constructed in the following manner: a plurality of basic pattern unit forming parts are arranged regularly as a whole in an area of ​​the tire mold corresponding to the marking area of ​​the tire sidewall, but a plurality of right-angle recesses (recesses with right angles) are irregularly arranged in one basic pattern unit forming part, thereby having horizontal and vertical asymmetry, thereby significantly improving the visibility of the marking in the marking area.

[0016] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a tire mold for forming an atypical sidewall pattern, wherein the tire mold is configured to form a marking area of ​​a tire sidewall, and is characterized in that: the tire mold includes a plurality of basic pattern unit forming parts, the plurality of basic pattern unit forming parts are arranged in an area of ​​the tire mold corresponding to the marking area of ​​the sidewall, the basic pattern unit forming parts are formed by a plurality of right-angle recesses when viewed from the surface of the tire mold, and the plurality of right-angle recesses are generally arranged asymmetrically in the horizontal and vertical directions.

[0017] Preferably, the basic pattern unit forming parts are regularly arranged to form a series of pattern unit arrangement structures.

[0018] Preferably, the plurality of right-angle recesses are irregularly arranged in the basic pattern unit forming portion.

[0019] Preferably, the plurality of right-angle recesses include at least one rectangular recess, or an inverted L-shaped recess or an L-shaped recess.

[0020] More preferably, the plurality of right-angled recesses in the basic pattern unit forming portion are curved, or are formed of only straight lines without bends or curves.

[0021] Most preferably, the basic pattern unit forming portion has an inverted trapezoidal cross-sectional shape.

[0022] More preferably, the basic pattern unit forming portion has a unit area having a length of one side within a range of 0.8 mm to 1.5 mm, but there is no limitation on the size thereof.

[0023] Preferably, the depth of the basic pattern unit forming portion is in the range of 0.2 to 0.5 mm.

[0024] Preferably, the basic pattern unit forming portion is located in a marking area other than a marking portion such as a character or a logo.

[0025] In addition, according to another aspect of the present invention, a tire having an atypical sidewall pattern manufactured by the tire mold is provided.

[0026] The tire mold of the present invention has an atypical pattern unit forming portion, thereby significantly improving the visibility of the mark engraved on the tire sidewall.

[0027] In fact, in a tire manufactured using the tire mold of the present invention, the atypical protruding pattern is arranged on the sidewall with uniform regularity, thereby improving the visibility of the markings engraved on the sidewall. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0029] Figure 1 is a partial cross-sectional view showing in detail the structure of a typical vehicle tire;

[0030] Figure 2a is a plan view showing a pattern unit forming portion formed in a tire mold of the present invention;

[0031] Figure 2b is Figure 2a A cross-sectional view taken on line AA;

[0032] Figure 3 It shows Figure 2a A plan view showing a state in which a basic pattern unit forming portion is arranged in a tire mold;

[0033] Figure 4a is a plan view showing a second pattern unit forming portion provided in a tire mold according to another embodiment of the present invention;

[0034] Figure 4bis a plan view showing a third pattern unit forming portion provided in a tire mold according to another embodiment of the present invention;

[0035] Figure 5 is a plan view of a pattern unit forming portion for comparison with the pattern unit forming portion of the present invention; and

[0036] Figure 6 It shows Figure 5 The illustrated plan view is a state in which a basic pattern unit forming portion is arranged in a tire mold. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are provided to more clearly describe the present invention to those skilled in the art. The following embodiments may be modified in various forms, and the scope of the present invention is not limited to the following embodiments. Specifically, the embodiments are provided to make the present disclosure more real and clear, and to clearly convey the technical ideas of the present invention to those skilled in the art. In addition, for the convenience and clarity of description, the thickness or size of each layer in the drawings is exaggerated.

[0038] In the present disclosure, terms such as first and second are used to describe various members, components, regions, layers and / or parts, but it is obvious that these members, components, regions, layers and / or parts should not be limited by these terms.

[0039] Hereinafter, a tire mold according to the present invention will be described in detail with reference to the accompanying drawings.

[0040] [First embodiment]

[0041] 2 is a view showing a basic first pattern unit forming portion formed in a tire mold of the present invention, wherein Figure 2a is its floor plan, Figure 2b is along Figure 2a A cross-sectional view taken along line AA.

[0042] Figure 3 It shows Figure 2a FIG. 1 is a plan view showing a state in which a plurality of first basic pattern unit forming portions are arranged in a tire mold.

[0043] As shown in FIGS. 2 and 3 , the tire mold 100 of the present invention includes a plurality of basic pattern unit forming portions 110 , 120 , 130 , . . . , which are arranged in areas thereof corresponding to the marking areas of the tire sidewalls, thereby forming a series of pattern unit arrangement structures.

[0044] In the present disclosure, a basic pattern unit forming portion refers to one pattern unit forming portion, which means a minimum unit of a pattern arrangement structure in a tire mold.

[0045] like Figure 2aAs shown, when viewed from the surface of the tire mold, the first basic pattern unit forming portion 110 is formed by a plurality of right-angled recesses 101, 102, 103, ..., and the plurality of right-angled recesses 101 to 109 are arranged asymmetrically in the horizontal and vertical directions as a whole. For example, the right-angled recesses 101 to 105 located on the left side and the right-angled recesses 106 to 109 located on the right side of the basic pattern unit forming portion 110 are relatively different in number and size and are asymmetrical to each other. Similarly, the right-angled recesses 101, 102, 105, 107 and 109 located on the upper side of the basic pattern unit forming portion 110 are also different in number and size and are asymmetrical to each other from the right-angled recesses 103, 104, 106 and 108 located on the lower side.

[0046] like Figure 2a As shown, the plurality of right-angled recesses 101 to 109 forming the basic pattern unit forming portion 110 may be at least one rectangular recess 101, 102, 105, 106 or 108, or may include inverted L-shaped recesses 107 and 109 or L-shaped recesses 103 and 104. The technical idea of ​​the present invention is that a plurality of right-angled recesses are irregularly arranged in one basic pattern unit forming portion 110 so as to be asymmetric to each other. It is preferred to adopt any basic pattern unit forming portion as long as it is configured so that a plurality of right-angled recesses are arranged to have an irregular arrangement structure (i.e., an asymmetric arrangement structure).

[0047] These plurality of right-angled recesses 101 to 109 are formed by conventional laser processing.

[0048] There is no need to limit the size of the basic pattern unit formations 110. However, when these formations are located within a unit area in the range of about 0.8 to 1.5 mm, the visibility of the marking is improved.

[0049] like Figure 2b As shown, the plurality of right-angled recesses 101 and 105 formed in the basic pattern unit forming portion 110 preferably have an inverted trapezoidal cross-sectional shape. The depth d of the plurality of right-angled recesses 101 to 109 is preferably in the range of about 0.2 to 0.5 mm, more preferably in the range of 0.3 to 0.5 mm.

[0050] The distance S between the plurality of right-angled recesses 101 to 109 in the basic pattern unit forming portion 110 is preferably in the range of 0.03 to 0.1 mm, and more preferably in the range of 0.04 to 0.06 mm.

[0051] The base width w of the plurality of right-angled recesses 101 to 109 is preferably in the range of 0.14 to 0.5 mm, more preferably in the range of 0.16 to 0.20 mm. In addition, the inclination angle θ between the plurality of right-angled recesses 101 to 109 is preferably about 22 to 30 degrees, more preferably about 24 to 28 degrees.

[0052] More preferably, the plurality of right-angle recesses 101 to 109 are formed only by straight lines without bends or curves. Although the right-angle recesses 101 to 109 are adjacent to each other, the spaces between the right-angle recesses are minimized, so that the visibility of the mark in the mark area due to diffuse reflection can be greatly improved.

[0053] As mentioned in the technical idea of ​​the present invention, a plurality of right-angled recesses 101 to 109 are irregularly arranged in the basic pattern unit forming portion 110 to have irregularity. Figure 3 As shown, a plurality of pattern unit forming portions 110, 120, 130, . . . are regularly arranged in an area of ​​the tire mold 100 corresponding to a marking area of ​​a tire sidewall.

[0054] like Figure 2a and 3 As shown, another basic pattern unit forming portion 120 is located near the blank area between the two right-angled recesses 105 and 109 on the upper right side of the basic pattern unit forming portion 110. Similarly, another basic pattern unit forming portion 130 is also located near the blank area between the two right-angled recesses on the upper right side of the basic pattern unit forming portion 120.

[0055] In the tire manufactured by the tire mold of the present invention having the above-mentioned pattern, the mark engraved in the mark area of ​​the sidewall becomes clearer due to the irregular arrangement structure of the sidewall pattern at the periphery.

[0056] [Second and third embodiments]

[0057] As described above, the basic pattern unit forming portion of the present invention is not limited to the first pattern unit forming portion, and may be composed of a plurality of right-angled recessed portions capable of imparting asymmetry.

[0058] FIG. 4 shows another embodiment of various types of basic pattern unit forming parts provided in the tire mold of the present invention, wherein Figure 4a is a plan view showing a second pattern unit forming portion 110a, Figure 4b 2 is a plan view showing the third pattern element forming portion 210 .

[0059] like Figure 4a As shown, the second pattern unit forming portion 110a is substantially similar to the first pattern unit forming portion 110. However, they differ in that: Figure 2a The right angle recess 103 at the lower left corner is formed by Figure 4a Two right-angle recesses 103a and 103b are formed in the Figure 2a The right angle recess 109 at the upper right corner is formed by Figure 4aSimilar to the first basic pattern unit forming portion 110, also in the second basic pattern unit forming portion 110a, all the plurality of right-angled recesses are asymmetrically arranged in the vertical and horizontal directions.

[0060] like Figure 4b As shown, the third pattern element forming portion 210 is composed of four right-angled recesses 201 to 204 and has an asymmetrical shape in the vertical and horizontal directions within the pattern element forming portion as a whole.

[0061] According to experiments conducted by the present inventors, it can be seen that the tire manufactured by the tire mold having the first and second pattern unit forming parts has better visibility of the marking in the marking area of ​​the sidewall than the tire manufactured by the tire mold having the third pattern unit forming part.

[0062] [Comparative Example]

[0063] at the same time, Figure 5 is a plan view of a pattern unit forming portion for comparison with the pattern unit forming portion of the present invention, Figure 6 It shows Figure 5 The illustrated plan view is a state in which a pattern unit forming portion is arranged in a tire mold.

[0064] Different from the basic pattern unit forming parts 110 and 210 of the present invention, Figure 5 The basic pattern unit forming portion 310 of the comparative example shown includes a plurality of curved recessed portions 301-304 having a curved or arc shape. In this case, even if the plurality of curved recessed portions 301 to 304 in the basic pattern unit forming portion 310 are arranged asymmetrically as a whole, as shown in FIG. Figure 6 As shown, however, when adjacent pattern unit forming portions 310, 320, 330, ... are arranged with each other, more space than necessary is generated in the curve or curved portion. As in the comparative example, in the case of having a curved recess, diffuse reflection is reduced, so that the visibility of the mark in the mark area of ​​the side wall is reduced. Therefore, in the tire mold of the present invention, the basic pattern unit forming portion needs to be formed by a plurality of right-angle recesses when viewed from the surface of the tire mold. In addition, it is preferred that the plurality of right-angle recesses are asymmetrically arranged in the horizontal and vertical directions as a whole.

[0065] Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments and those skilled in the art will appreciate that various modifications and variations may be made without departing from the spirit of the invention as defined by the appended claims.

[0066] [Industrial Applicability]

[0067] The present invention relates to the field of vehicle tires, and in particular, a tire manufactured using the tire mold of the present invention has the advantage of excellent visibility of markings in the sidewall marking area.

[0068] [Explanation of Reference Numerals]

[0069] 100, 200, 300: Tire mold

[0070] 101 to 109, 201-204: Right-angle recess

[0071] 110, 110a, 120, 130, 210, 310, 320, 330: basic pattern unit forming portion

[0072] 301-304: Curved recess

Claims

1. A tire mold for forming an atypical sidewall pattern, wherein: The tire mold is configured to form a marking area of ​​a tire sidewall, characterized in that: The tire mold includes a plurality of basic pattern unit forming portions, the basic pattern unit forming portions being arranged in an area of ​​the tire mold corresponding to the marking area of ​​the sidewall, and When viewed from the surface of the tire mold, the basic pattern unit forming portion is formed of a plurality of right-angled recesses, and the plurality of right-angled recesses are asymmetrically arranged in horizontal and vertical directions as a whole.

2. The tire mold for forming an atypical sidewall pattern according to claim 1, in, The basic pattern unit forming portions are regularly arranged to form a series of pattern unit arrangement structures.

3. The tire mold for forming an atypical sidewall pattern according to claim 1, in, The plurality of right-angle recesses are irregularly arranged in the basic pattern unit forming portion.

4. The tire mold for forming an atypical sidewall pattern according to claim 1, in, The plurality of right-angle recesses include at least one rectangular recess, or an inverted L-shaped recess or an L-shaped recess.

5. The tire mold for forming an atypical sidewall pattern according to claim 1, in, The plurality of right-angled recesses in the basic pattern unit forming portion are curved, or are formed of only straight lines without bends or curves.

6. The tire mold for forming an atypical sidewall pattern according to claim 1, in, The basic pattern unit forming portion has an inverted trapezoidal cross-sectional shape.

7. The tire mold for forming an atypical sidewall pattern according to claim 6, in, The basic pattern unit forming portion has a unit area, and the length of one side of the unit area is in the range of 0.8 to 1.5 mm.

8. The tire mold for forming an atypical sidewall pattern according to claim 6, in, The depth of the basic pattern unit forming portion is in the range of 0.2 to 0.5 mm.

9. The tire mold for forming an atypical sidewall pattern according to claim 1, in, The basic pattern unit forming portion is located in a marking area other than a marking portion such as a character or a logo.

10. A tire comprising an atypical sidewall pattern manufactured by the tire mold according to any one of claims 1 to 9.

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