KR101794917B1 - Manufacturing method of tire and tire - Google Patents

Abstract

According to an embodiment of the present invention, disclosed is a manufacturing method of a tire. The manufacturing method comprises a step of dividing the entire area of a tire into a plurality of virtual division areas, and a pitch forming step of forming a pitch on the division areas. The pitch forming step includes: a pitch designing step of designing information containing lengths and the number of various kinds of pitches; a pitch arranging step of arranging the pitches which are designed in the pitch designing step virtually on the surfaces of the division areas of the tire; a division area pitch determining step of grasping information on the pitches which are arranged on each of the division areas through the pitch arranging step; a division area deviation determining step of calculating a pitch deviation value with respect to the lengths of the pitches for each of the division areas by using the determined result from the division area pitch determining step; a uniformity determining step of calculating a uniformity index by using a deviation between pitch deviation values of each of the division areas which have been calculated through the division area deviation determining step; and a control determining step of performing a step of forming a real pitch on the surface of the tire by using information on the pitch designing step and the pitch arranging step only when the uniformity index calculated through the uniformity determining step is determined to meet a set condition.

Description

Technical Field [0001] The present invention relates to a tire manufacturing method,

Embodiments of the present invention relate to a tire manufacturing method and a tire.

The vehicles that the users are traveling with are made up of many parts, among which the tires have a great effect on the driving of the vehicle, and can be said to be one of the key components for securing the safety of the user.

Especially, due to the development of industry, the increase of the movement of logistics, the increase of the moving amount due to the increase of the individual workload, and the increase of the family life are increasing the automobile operation.

In the process of manufacturing a tire, a pattern having elasticity and flexibility is used to form a desired shape, that is, a circular tire. At this time, a pattern having a groove in a region of the tire, .

The characteristics of various tires can be secured through the design and arrangement of such patterns.
Methods for designing a pattern on the surface of a tire have been studied in many places, for example, Japanese Laid-Open Patent Publication No. 2009-113768 or Korean Patent Registration No. 10-0541924.

Embodiments of the present invention provide a tire manufacturing method and a tire that improve noise reduction characteristics and uniformity characteristics.

One embodiment of the present invention includes a pitch forming step of dividing an entire area of a tire into a plurality of virtual divided areas and forming a pitch in the plurality of divided areas, A pitch designing step of designing information including a length and a number of kinds of pitches, a pitch designing step of virtually arranging the pitch designed in the pitch designing step on the surface of the divided region of the tire, Determining a pitch deviation value for a pitch length for each of the divided regions using a result determined in the divided region pitch determination step; And calculating a deviation between the pitch deviation values of the respective divided regions calculated through the dividing region deviation determination step And determining a uniformity index calculated through the uniformity determination step according to the setting condition and using the information of the pitch designing step and the pitch setting step only when the uniformity index calculated according to the uniformity determining step meets the setting condition, And a step of forming an actual pitch on the surface of the tire.

In the present embodiment, the pitch designing step may include designing a plurality of types of pitches having different lengths with respect to the circumferential direction of the tire.

In the present embodiment, the pitch design step includes numbering the plurality of types of pitches having different lengths so as to have corresponding numbers, wherein the order of the values of the corresponding numbers corresponding to the plurality of pitches is determined by the plurality of types And the pitch of the pitches of the first and second lines.

In the present embodiment, the value of the corresponding number may have a natural number value that sequentially increases in accordance with the order of lengths of the pitches of the plurality of kinds.

In the present embodiment, the pitch designing step may include designing five kinds of pitches having different lengths from each other.

In the present embodiment, the pitching step may include irregularly arranging pitches of different lengths from each other.

In the present embodiment, the dividing region pitch determination step may check the circumferential lengths of tires of different kinds of pitches arranged in the respective divided regions.

In the present embodiment, the step of determining the divided area deviation may calculate a deviation value with respect to the circumferential lengths of the tires of different kinds of pitches arranged in the respective divided areas.

Another embodiment of the present invention discloses a tire made using any one of the above methods.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

The tire manufacturing method and the tire according to the present embodiment can improve the noise reduction characteristic and the uniformity characteristic.

1 is a flowchart schematically showing a tire manufacturing method according to an embodiment of the present invention.
Fig. 2 is a flowchart specifically showing step S200 of Fig.
FIGS. 3 to 7 are views for explaining the tire manufacturing method of FIGS. 1 and 2 in detail.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below, but may be implemented in various forms.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning.

In the following examples, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

In the following embodiments, terms such as inclusive or possessive are intended to mean that a feature, or element, described in the specification is present, and does not preclude the possibility that one or more other features or elements may be added.

In the drawings, components may be exaggerated or reduced in size for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

In the following embodiments, the x-axis, the y-axis, and the z-axis are not limited to three axes on the orthogonal coordinate system, and can be interpreted in a broad sense including the three axes. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but may refer to different directions that are not orthogonal to each other.

If certain embodiments are otherwise feasible, the particular process sequence may be performed differently from the sequence described. For example, two processes that are described in succession may be performed substantially concurrently, and may be performed in the reverse order of the order described.

FIG. 1 is a flowchart schematically showing a tire manufacturing method according to an embodiment of the present invention, and FIG. 2 is a flowchart specifically showing a step S200 of FIG.

Referring to FIGS. 1 and 2, the tire manufacturing method of this embodiment includes a step S100 of dividing the entire region of the tire into a plurality of regions and a pitch forming step S200.

The pitch forming step S200 includes a pitch designing step S210, a pitch arranging step S220, a dividing region pitch judging step S230, a dividing area deviation judging step S240, a uniformity judging step S250, S270).

Step S100 of dividing the entire area of the tire into a plurality of areas may include dividing the entire area of the tire into virtual divided areas, and dividing the entire area of the tire evenly into two or more areas.

For example, the entire area of the tire may be divided into three or four in the circumferential direction of the tire, through which the tire may include three or four imaginary partitions.

The details of this will be described later with reference to FIG. 3 to FIG.

The pitch forming step S200 may include forming a pitch on the surface of the tire.

The pitch may have the same shape as a pattern formed on the surface of the tire, for example, the surface corresponding to the tread.

Specifically, the pitch may include a pattern or a plurality of patterns, and the pattern may be a block partitioned through the grooves.

The pitch forming step S200 may include a plurality of steps. Specifically, the pitch designing step S210, the pitch arranging step S220, the dividing area pitch determining step S230, the dividing area deviation judging step S240, The uniformity determination step S250 and the control determination step S270.

Each step will be described below.

The pitch design step S210 may include designing the type of pitch, the length of each pitch, and the number of each pitch.

As described above, the pitches are arranged on the surface of the tie. In this embodiment, it is possible to design a plurality of kinds of pitches having different lengths, for example, different lengths in the circumferential direction of the tire without arranging one kind of pitches.

And determining how many pitches of the respective types are to be placed on the surface of the tire.

For example, five kinds of pitches having different lengths can be designed, and it is possible to determine how many pitches of one kind of pitches of these five kinds are to be placed on the surface of the tire.

Further, as an alternative embodiment, in the pitch design step S210, numbering is performed for different kinds of pitches, and each kind of pitches may have different corresponding numbers. This numbering may involve mapping a number proportional to the length of the pitch.

For example, when five types of pitches are designed as described above, the pitches of the smallest-pitch types are 1, and the pitches of increasing lengths are 2, 3, 4, and 5 in a corresponding number have.

The pitch arrangement step S220 may include a step of virtually arranging the pitch designed in the pitch design step S210 on the surface of the tire.

That is, in the above example, when five types of pitches are designed, five kinds of pitches can be arranged on the surface of a virtual tire.

At this time, five kinds of pitches having different lengths can be irregularly arranged, thereby reducing the noise (e.g., pattern noise) of the tire. As an alternative embodiment, the number of pitches of the same kind may be limited in accordance with the setting condition, and the noise reduction effect can be increased.

In the split area pitch determination step S230, the pitches arranged through the pitch arrangement step S220 can be grasped for each of the divided areas formed in the step S100 of forming the virtual divided area.

At this time, in the divided area pitch determination step (S230), the types of the pitches arranged in the respective divided areas can be grasped and the number of each kind of pitches can be determined as an alternative embodiment.

For example, when the five types of pitches are designed and arranged, all kinds of pitches arranged in the respective divided regions can be grasped.

The step of determining the divided area deviation (S240) can determine the pitch deviation for each of the divided areas using the result determined in the divided area pitch determination step (S230).

As a concrete example, when three divided regions are formed on the surface of the tire, the three divided regions may be defined as a first divided region, a second divided region, and a third divided region. The difference between the largest pitch and the smallest pitch among the pitches arranged in the first divided area can be calculated.

Particularly, as an alternative embodiment, the difference between the maximum value and the minimum value of the corresponding numbers corresponding to each other through the numbering can be calculated. If the pitch with the largest corresponding value among the pitches arranged in the first divided area is 4 and the pitch with the smallest corresponding number value is 2, it may be a binary difference value which is a difference between 4 and 2.

In addition, the deviation can be calculated for other divisional areas, for example, the second divisional area and the third divisional division, through this method.

In the uniformity determination step S250, the uniformity index can be calculated using the deviation of each divided area determined in the dividing area deviation determination step S240.

Specifically, the difference between the maximum value and the minimum value among the deviation values of each divided region is calculated, and this value can be defined as a uniformity index.

For example, when there are three divided areas as described above, when the deviation value of the first divided area is 2, the deviation value of the second divided area is 3, and the deviation value of the third divided area is 4, the uniformity index is 2, which is the difference between 4 and 2, becomes a uniformity index.

The control determining step S270 compares the uniformity index calculated in the total area uniformity index calculating step S250 with the setting condition and determines that the noise condition and the uniformity condition are satisfied at the time of pitch design when the setting condition is matched, As shown in FIG.

On the contrary, if the uniformity index does not satisfy the setting condition, the layout of the pitch can be redesigned, and then the above-described process can be performed again, specifically until the uniformity index corresponds to the setting condition, Thereafter, the pitch formation step can be performed later.

FIGS. 3 to 7 are views for explaining the tire manufacturing method of FIGS. 1 and 2 in detail.

The tire manufacturing method of this embodiment will be described in detail with reference to Figs. 3 to 7. Fig.

Fig. 3 is a front view of the tire, and Fig. 4 is a sectional view taken along the line IV-IV in Fig.

Referring to FIGS. 3 and 4, the tire 100 may have a shape extending in the circumferential direction RT about the central axis AX.

The tire 100 may include a wheel (not shown) coupled to the inside thereof with respect to the radial direction R from the central axis AX, and an outer surface thereof may be in contact with the road surface.

Concretely, the bead portion BD is formed on one inner side of the tire 100 with respect to the radial direction R, thereby facilitating stable engagement with the wheel (not shown).

A tread portion T may be formed in one region of the tire 100 on the outer side with respect to the radial direction R and the tread portion T may include a region in contact with the road surface.

A sidewall SW may be formed between the tread portion T and the bead portion BD.

The tread portion T includes a pattern region 4 in which a plurality of pitches are formed.

5 is an enlarged view of the pattern region 4 of the tread portion T of Fig.

Referring to FIG. 5, a plurality of pitches are formed in the pattern region 4.

Also, the tire may include a plurality of divided areas DA1, DA2, and DA3. That is, it includes partitioning the entire area of the tire to form three virtual divided areas. These three divided regions may have a uniform shape and size, and may be divided in the circumferential direction RX with respect to the center axis AX of the tire 100 as a specific example.

The partitioning of the tires may actually be to form any imaginary partitions rather than dividing each area or forming a dividing boundary line.

A plurality of pitches are formed in the pattern region 4, but a plurality of types of pitches are formed instead of one.

As a specific example, the present embodiment is characterized in that the first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4 and the fifth pitch P4 having different lengths from each other as five kinds of pitches P5).

The first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4 and the fifth pitch P5 have different lengths from each other. Specifically, the first pitch P1, the second pitch P2, The third pitch P3 is the third length W3, the fourth pitch P4 is the fourth length W4, and the second pitch W2 is the second pitch W2. The fifth pitch P5 may have a fifth length W5.

The first length W1, the second length W2, the third length W3, the fourth length W4 and the fifth length W5 are lengths in one direction, RT).

The first length W1, the second length W2, the third length W3, the fourth length W4, and the fifth length W5 have different values, which may sequentially increase in value. That is, the second length W2 has a larger value than the first length W1, the third length W3 has a larger value than the second length W2, and the third length W3 has a larger value than the third length W3. The fourth length W4 has a large value and the fifth length W5 has a larger value than the fourth length W4.

Further, a plurality of pitches may be formed for each type in the pattern region 4 of the tire. The pattern region 4 includes a plurality of first pitches P1, a plurality of second pitches P2, a plurality of third pitches P3, a plurality of fourth pitches P4, and a plurality of fifth pitches P5 May be formed.

A plurality of first pitches P1, a plurality of second pitches P2, a plurality of third pitches P3, a plurality of fourth pitches P4, and a plurality of fifth pitches P5 ), The above-described method can be carried out.

That is, a plurality of pitches can be formed on the surface of the tire according to a desired setting condition by proceeding to a pitch designing step, a pitch arranging step, a dividing area pitch determining step, a dividing area deviation determining step, an entire area uniformity calculating step, .

Specifically, the pitch type, the pitch length, and the number of pitches are designed through the pitch designing step. As shown in FIG. 5, five types of pitches and lengths of the pitches can be designed and designed.

For example, the first length W1 of the first pitch P1, the second length W2 of the second pitch P2, the third length W3 of the third pitch P3, the fourth pitch P4 The fourth length W4 of the fifth pitch P5 and the fifth length W5 of the fifth pitch P5. For example, the ratios of the first length W1, the second length W2, the third length W3, the fourth length W4 and the fifth length W5 are 0.8: 0.9: 1: 1.1: 1.2 So that the intervals of the lengths of the different kinds of pitches can be the same.

 As an alternative embodiment, in the pitch design stage, different types of pitches, i.e., a first pitch P1, a second pitch P2, a third pitch P3, a fourth pitch P4, and a fifth pitch P5 are sequentially numbered so that the first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4 and the fifth pitch P5 are different from each other, .

The sequential order of the values of the lengths of the first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4 and the fifth pitch P5 corresponds to the value of the corresponding number N . ≪ / RTI >

For example, the first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4, and the fifth pitch P5 may have sequentially corresponding values as corresponding numbers Specifically, the corresponding number N of the first pitch P1 is 1, the corresponding number N of the second pitch P2 is 2, the corresponding number N of the third pitch P3 is 3, The corresponding number N of the pitch P4 may be 4 and the corresponding number N of the fifth pitch P5 may be 5. [

In the pitch arrangement step, the pitch designed in the pitch design stage may be virtually arranged on the surface of the tire.

That is, when five kinds of pitches are designed in the above example, the first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4, and the fifth pitch P5 It can be arranged on the surface of the imaginary tire in advance.

6, the surface of the tire is equally divided into three parts in the circumferential direction (RT) to form the first divided area DA1, the second divided area DA2, and the third divided area DA3, The first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4 and the fifth pitch P5, more specifically one or more first pitches P1, One or more third pitches P3, one or more fourth pitches P4, and one or more fifth pitches P5 may be virtually arranged.

7, the surface of the tire is equally divided into four parts in the circumferential direction (RT) to form a first divided area DA1, a second divided area DA2, a third divided area DA3 The first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4, and the fifth pitch P5, and more specifically, the first pitch P1, the second pitch P2, The first pitch P1, the at least one second pitch P2, the at least one third pitch P3, the at least one fourth pitch P4 and the at least one fifth pitch P5 may be virtually arranged.

At this time, the first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4 and the fifth pitch P5 having different lengths can be irregularly arranged, The noise of the tire (for example, pattern noise) can be reduced. As an alternative embodiment, the number of pitches of the same kind may be limited in accordance with the setting condition, and the noise reduction effect can be increased.

In the step of determining the divided area pitch, it is possible to grasp the arranged pitches of the respective divided areas formed in the step of forming the virtual divided area. For example, as shown in Fig. 6, the surface of the tire is equally divided into three parts in the circumferential direction (RT) to form the first divided area DA1, the second divided area DA2, and the third divided area DA3 When the first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4 and the fifth pitch P5 are arranged, the first division area DA1, The information of the pitches arranged in the area DA2 and the third partition area DA3 can be grasped. Specifically, it is possible to grasp the types of pitches arranged in the respective divided regions.

Then, in the step of determining the deviation of the divided area, the pitch deviation may be determined for each divided area.

6, the surface of the tire is equally divided into three portions in the circumferential direction RT to form the first divided region DA1, the second divided region DA2, and the third divided region DA3 It is possible to calculate the difference between the largest pitch and the smallest pitch among the pitches arranged in each of the first divisional area DA1, the second divisional area DA2 and the third divisional area DA3 have.

Particularly, as an alternative embodiment, the difference between the maximum value and the minimum value of the correspondence number N corresponding through the numbering can be corresponded by the deviation.

The pitch of the pitches arranged in the first division area DA1 is the first pitch P1, the second pitch P2, the third pitch P3, the fourth pitch P4 and the fifth pitch P5 The difference between the fifth pitch P5 having the longest pitch and the first pitch P1 having the shortest length can be calculated. As an alternative embodiment, the difference value between 1, which is the corresponding number N of the fifth pitch P5 and the corresponding number N of the first pitch P1, that is, 4 is the deviation value of the first division area DA1 .

Likewise, when the types of pitches arranged in the second division area DA2 are the first pitch P1, the second pitch P2 and the third pitch P3, the third pitch (i.e., P3 and the length of the first pitch P1 having the shortest length can be calculated. As an alternative embodiment, the difference value between 3, which is the corresponding number N of the third pitch P3, and 1, which is the corresponding number N of the first pitch P1, that is, 2 is the deviation value of the second division area DA2 .

Likewise, when the types of pitches arranged in the third division area DA3 are the second pitch P2, the third pitch P3, the fourth pitch P4 and the fifth pitch P5, The difference between the fifth pitch P5 having a large pitch and the second pitch P2 having the shortest pitch can be calculated. As an alternative embodiment, the difference value between 5, which is the corresponding number N of the fifth pitch P5, and 2, which is the corresponding number N of the second pitch P2, that is, 3 is the deviation value of the third division area DA3 .

As a result, in this example, the deviation value of the first divisional area DA1 is 4, the deviation value of the second divisional area DA2 is 2, and the deviation value of the third divisional area DA3 is 3.

In the uniformity determination step, the uniformity index can be calculated using the deviation of each divided area determined in the dividing area deviation determining step.

Specifically, the difference between the maximum value and the minimum value among the deviation values of each divided region can be calculated.

As a specific example, the deviation value of the first divisional area DA1 is 4, the deviation value of the second divisional area DA2 is 2, and the deviation value of the third divisional area DA3 is 3 days In this case, the maximum value among these deviation values is 4, which is the deviation value of the first partition area DA1, and the minimum value is 2, which is the deviation value of the second partition area DA2.

Therefore, the difference between the maximum value and the minimum value of the deviation values of the divided areas becomes 2. These values can be defined as the uniformity index.

In the control decision step, the uniformity index calculated at the step of calculating the uniformity index of the whole area is compared with the setting condition, and when it corresponds to the setting condition, it is determined that the noise condition and the uniformity condition are satisfied at the time of pitch design, Step can proceed.

That is, in the above example, the uniformity index is 2, and this value can be compared with the setting condition. These setting conditions

The setting condition may be 0 to 2 as an alternative embodiment. That is, if the uniformity index corresponds to 0 or more and 2 or less, it is determined that the set condition is satisfied and the pitch can be formed according to the designed conditions. That is, the pitch can be formed directly on the surface of the actual tire, not on the surface of the virtual tire.

In this example, the uniformity index is 2 and corresponds to setting conditions. That is, it can be determined that the uniformity of the pitch arrangement of the tire surface is ensured.

The tire manufacturing method of this embodiment divides the entire region of the tire into a plurality of regions to form a virtual divided region. Then, in the actual pitch formation for such a divided region, the pitch design and the virtual placement of the pitch are performed before the direct formation, the pitches are determined, and the pitch is formed after judging whether or not the condition is satisfied. This makes it possible to easily secure the characteristics of the tire.

Specifically, it is possible to design different kinds of pitches, for example, to design a plurality of kinds of pitches having different lengths, particularly different lengths in the circumferential direction of the tire, and to arrange them on the surface of the tire. Through this, an irregular pattern in a region in contact with the road surface of the tire can be realized, so that noise such as pattern noise can be reduced.

In this embodiment, a pitch having various kinds of lengths is designed and is preliminarily arranged in a virtual manner in a plurality of divided regions, and then a deviation value in each divided region can be calculated. In this case, the deviation value can be easily calculated using the corresponding number value corresponding to the length of each pitch. As a concrete example, the sequential natural numbers in the order of the lengths of the different kinds of pitches are corresponded to the corresponding number value, The deviation can be easily calculated.

Then, the deviation value of each of these divided regions is compared with the other divided regions. That is, the uniformity of the entire area of the tire is considered. Specifically, the difference between the maximum value and the minimum value among the deviation values of the plurality of divided regions can be calculated and corresponded to the uniformity index. This uniformity index can be compared with the setting conditions.

Only when the uniformity index is within the range of the setting condition, the virtual pitch arrangement can be actually formed on the surface of the tie as designed.

Through this process, not only the noise on the surface of the tire can be reduced, but also the uniformity of the surface of the tire, in particular, the tread portion can be improved. Particularly, by improving the uniformity, it is possible to improve the running characteristic by reducing the uneven wear phenomenon of the surface of the tire, for example, the tread portion.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art . Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

The specific implementations described in the embodiments are, by way of example, not intended to limit the scope of the embodiments in any way. For brevity of description, descriptions of conventional electronic configurations, control providing methods, software, and other functional aspects of the providing methods may be omitted. Also, the connections or connecting members of the lines between the components shown in the figures are illustrative of functional connections and / or physical or circuit connections, which may be replaced or additionally provided by a variety of functional connections, physical Connection, or circuit connections. Also, unless explicitly mentioned, such as "essential "," importantly ", etc., it may not be a necessary component for application of the present invention.

The use of the terms "above" and similar indication words in the description of the embodiments (in particular in the claims) may refer to both singular and plural. In addition, in the embodiment, when a range is described, it includes the invention to which the individual values belonging to the above range are applied (if there is no description to the contrary), the individual values constituting the above range are described in the detailed description . Finally, the steps may be performed in an appropriate order, unless explicitly stated or contrary to the description of the steps constituting the method according to the embodiment. The embodiments are not necessarily limited to the description order of the steps. The use of all examples or exemplary terms (e.g., etc.) in the examples is for the purpose of describing the embodiments in detail and is not intended to be limited by the scope of the claims, It is not. It will also be appreciated by those skilled in the art that various modifications, combinations, and alterations may be made depending on design criteria and factors within the scope of the appended claims or equivalents thereof.

100: Tire
T: Tread portion
SW: sidewall
BD: bead portion
RT: circumferential direction
DA1, DA2, DA3, DA4:

Claims (9)

And dividing the entire area of the tire into a plurality of hypothetical divided areas, and a pitch forming step of forming a pitch in the plurality of divided areas,
Wherein the pitch forming step comprises:
A pitch designing step of designing information including a length and a number of plural kinds of pitches;
A pitch arrangement step of arranging a pitch designed in the pitch design step on the surface of the divided region of the tire;
Determining a pitch of the pitches arranged in the respective divided regions through the pitching step;
Calculating a pitch deviation value with respect to a pitch length for each of the divided regions using the result determined in the dividing region pitch determination step;
A uniformity determining step of calculating a uniformity index by using a deviation between the pitch deviation values of the respective divided areas calculated through the dividing area deviation determining step; And
Determining whether the uniformity index calculated through the uniformity determination step meets a setting condition, and forming an actual pitch on the surface of the tire using the information of the pitch design step and the pitch placement step only when the uniformity index is satisfied with the setting condition And a control step of causing the control unit to proceed,
Wherein the plurality of divided regions include a first divided region that is divided along the circumferential direction of the entire region of the tire and a second divided region that does not overlap with the first divided region,
Designing a plurality of types of pitches having lengths different from each other in a circumferential direction of the tire in the pitch designing step,
The pitch arrangement step may include arranging a plurality of pitches of different kinds having different lengths in the first division area of the plurality of division areas and arranging a plurality of different kinds of pitches having different lengths in the second division area , And the pitch of the pitch
Determining a length of each of a plurality of pitches of different kinds arranged in the first divided area in the step of determining a divided area pitch and determining a length of each of a plurality of pitches of different kinds arranged in the second divided area, , ≪ / RTI >
Wherein the step of judging the dividing area deviation includes a first dividing area deviation judging step of calculating a deviation value for each length of a plurality of different types of pitches arranged in the first dividing area, And calculating a deviation value for each length of a plurality of different kinds of pitches,
Wherein the uniformity determination step includes using a deviation between the deviation value calculated through the first divisional deviation determination step and the deviation value calculated through the second divisional deviation determination step. The method according to claim 1,
Wherein the pitch designing step includes designing a plurality of types of pitches having different lengths from each other with respect to the circumferential direction of the tire. 3. The method of claim 2,
The pitch design step includes numbering the plurality of types of pitches so as to have a corresponding number,
Wherein the order of the values of the corresponding numbers corresponding to the plurality of types of pitches is the same as the order of the lengths of the pitches of the plurality of kinds. The method of claim 3,
Wherein the value of the corresponding number has a natural number value that sequentially increases in accordance with the order of lengths of the plurality of kinds of pitches. 3. The method of claim 2,
Wherein the pitch designing step includes designing five kinds of pitches having different lengths from each other. 3. The method of claim 2,
Wherein the pitching step includes irregularly arranging the plurality of kinds of pitches. 3. The method of claim 2,
Wherein the dividing region pitch determination step measures the circumferential length of each of the plurality of types of pitches arranged in the respective divided regions. 3. The method of claim 2,
Wherein the dividing region deviation determining step calculates a deviation value between a maximum value and a minimum value with respect to a circumferential length of a tire of a plurality of types of pitches arranged in the respective divided regions. A tire produced using the method of any one of claims 1 to 8.

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