JP2023068582A - Method for designing tire molding die, tire molding die, and method for manufacturing tire molding die - Google Patents

Abstract

To provide an efficient method for designing a tire molding die that improves strength of a tire molding die while improving performance of a sipe; a tire molding die; and a method for manufacturing a tire molding die.SOLUTION: A method for designing a tire molding die 100 is for molding a tire having a sipe formed on a tread, and determines a pattern to be a basic shape for forming the sipe as a unit cell 1 and aligns the unit cells 1 to determine the entire shape of the sipe.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for designing a tire mold, a tire mold, and a method for manufacturing a tire mold.

Patent Document 1 describes a sipe blade for forming a three-dimensional groove (sipe) in a tire and a tire mold having the sipe blade. In this sipe blade, the element shape is a three-dimensional shape composed of two rhombic pyramids having rhombic bases connected with common sides. It has a three-dimensional structure in which the element shapes are continuous along one plane.

Patent Document 2 describes a method for manufacturing a sipe blade for a tire mold. In Patent Document 2, the bending shape after bending is a complicated shape such as a three-dimensional shape, which is composed of two types of bending shapes with different development lengths in the same direction in one continuous shape. A high performance sipe blade with It also describes that the sipe blade is formed by bending.

JP 2004-243644 A JP-A-2003-145545

In some cases, a large number of narrow grooves called sipes are formed in a tire in addition to the shape of the main groove. Sipe suppresses slip when driving on a wet road surface, ruptures water (the action of the edge that breaks the water film), improves water supply and drainage to grooves, improves scratching force on the road surface, and has rubber rigidity properties. It is formed for the purpose of adjusting the Forming a sipe in a tire maintains the rigidity of the rubber, thereby suppressing uneven wear.

As a conventional method for manufacturing a sipe portion of a tire mold, that is, a sipe blade (an example of a tire mold), as exemplified in Patent Document 2, a rolled material of high strength material (for example, steel) is used. is cut out and press-molded with a mold (so-called stamp molding) has been widely used. In recent years, a direct molding method using a so-called 3D printer has also begun to be adopted. Using a 3D printer increases the degree of freedom in adapting to changes in the thickness of the sipe blade and its complicated shape. There is an advantage that manufacturing is possible.

However, in the manufacturing method using a 3D printer, the strength tends to be lower and the strength tends to vary more than the sipe blade manufactured by stamp molding using a rolled material. Therefore, in some cases, it is not suitable for mass production compared to the case of manufacturing by stamp molding.

The present invention has been made in view of such circumstances, and its object is to design an efficient tire molding die that improves the strength of the tire molding die while improving the performance of the sipe. To provide a method, a tire mold and a method for manufacturing a tire mold.

A method for designing a tire molding die according to the present invention for achieving the above object includes:
A method for designing a tire molding die for molding a tire having a sipe formed on the tread,
A unit cell is defined as a mold that forms the basic shape of the sipe, and the overall shape of the sipe is determined by arranging the unit cells.

According to the above method, it is possible to provide an efficient method for designing a tire mold that improves the strength of the tire mold while improving the performance of the sipe.

According to the above method, a basic shape that improves the strength of the tire molding die while improving the performance of the sipe is determined, and this basic shape is the shape of the mold in the portion of the tire molding die that molds the sipe. It can be defined as a unit cell, which is the minimum unit. Then, it is possible to design a tire molding die in a highly efficient procedure of determining the overall shape of the sipe by a simple procedure of arranging the unit cells.

In the method for designing a tire mold according to the present invention, further,
In the direction along the axial direction of the tire, it is preferable that the unit cell is provided with a thick portion having a thickness relatively thicker than other portions of the unit cell.

According to the above-described method, the thickened portion can provide a portion in the groove of the sipe that forms a wider gap than other portions. As a result, when the sipe of the tread is deformed due to the deformation of the rubber of the tread of the tire during running, even after the inner surfaces facing each other in the narrow part of the gap in the sipe come into contact with each other, , the wide gap formed by the thick portion can remain. This allows the water sucked up from the road surface to flow through the gap.

In the method for designing a tire mold according to the present invention, further,
It is preferable to form a convex portion in the unit cell and use the convex portion as the thick portion.

Each time the tire is removed from the mold, the mold for the sipe portion is repeatedly subjected to external forces from the tire sipes. According to the above method, it is possible to improve the durability, for example, the repeated fatigue life, against the external force applied to the mold of the sipe portion when the tire is removed from the mold.

In the method for designing a tire mold according to the present invention, further,
It is preferable that the convex portion is formed continuously and the thick portion is provided along the ridge line of the convex portion.

According to the above method, the water sucked up from the road surface is caused to flow through the sipe gap formed along the convex portion (the gap remaining after the inner surfaces facing each other in the narrow portion of the gap in the sipe come into contact with each other). be able to.

In the method for designing a tire mold according to the present invention, further,
The first cell and the second unit cell are arranged such that the edges of the first cell, which is the first unit cell, and the second cell, which is the second unit cell adjacent to the first cell, are continuous. A second cell may be arranged.

According to the above method, the gaps in each portion of the sipe formed by the adjacent unit cells (the gap remaining after the inner surfaces of the sipe face each other in the narrow portion of the gap in the sipe come into contact with each other) are made continuous, and the continuous gap is In addition, water sucked up from the road surface can be made to flow.

A tire molding die according to the present invention for achieving the above object comprises:
A tire mold for molding a tire having a sipe formed on the tread,
Molds having a basic shape for forming the sipes are arranged as unit cells.

Further, in the tire mold according to the present invention,
In a direction along the axial direction of the tire, the unit cell may be provided with a thick portion that is relatively thicker than other portions of the unit cell.

Further, in the tire mold according to the present invention,
A convex portion may be formed on the unit cell, and the convex portion may be the thick portion.

Further, in the tire mold according to the present invention,
The convex portion may be formed continuously, and the thick portion may be provided along the ridgeline of the convex portion.

Further, in the tire mold according to the present invention,
The first cell and the second unit cell are arranged such that the edges of the first cell, which is the first unit cell, and the second cell, which is the second unit cell adjacent to the first cell, are continuous. Two cells may be arranged.

According to each of the above configurations, it is possible to improve the performance of the sipe and to provide a tire molding die with improved strength that can be designed and manufactured efficiently. . In addition, it is possible to obtain the action or effect of the above-described tire mold design method corresponding to each of the above configurations.

In order to achieve the above object, a method for manufacturing a tire mold according to the present invention comprises:
A method for manufacturing a tire molding die for molding a tire having a sipe formed on the tread,
The molds that form the basic shape of the sipe are arranged as unit cells.

According to the above method, it is possible to provide an efficient method for manufacturing a tire mold that can improve the strength of the tire mold while improving the performance of the sipe. In addition, the above-described tire molding die design method and tire molding die can exhibit the effects or effects.

It is a figure which shows the structure of the sipe blade which concerns on this embodiment. It is a perspective view which shows the shape of the cell of 1st embodiment. It is a perspective view which shows the shape of the cell of 1st embodiment. It is a perspective view which shows the shape of the type|mold part of 1st embodiment. It is a figure which shows the shape of the space in Sipe shape|molded by the type|mold part of 1st embodiment. FIG. 4 is a perspective view showing the shape of a cell according to a second embodiment; It is a perspective view which shows the shape of the type|mold part of 2nd embodiment. It is a figure which shows the shape of the space in the Sipe shape|molded by the type|mold part of 2nd embodiment. FIG. 10 is a perspective view showing the shape of the cell of the third embodiment; FIG. 10 is a perspective view showing the shape of the cell of the third embodiment; It is a perspective view which shows the shape of the type|mold part of 3rd embodiment. It is a figure which shows the shape of the space in the Sipe shape|molded by the type|mold part of 3rd embodiment.

A method for designing a tire mold, a tire mold, and a method for manufacturing a tire mold according to an embodiment of the present invention will be described with reference to the drawings.

The method for designing a tire mold according to the present embodiment relates to a method for designing a tire mold for molding a tire having a tread formed with sipes.

FIG. 1 shows a sipe blade 100 (hereinafter referred to as blade 100) as an example of a tire molding die according to this embodiment. The blade 100 is a mold for forming sipes (grooves) in the tread of the tire when the tire is vulcanized.

The blade 100 has a base A fixed to a tire molding die for forming the tread of the tire, and is integrally molded with the base A, for example, and the mold that forms the basic shape of the sipe in the tread of the tire is a unit. and mold parts B arranged as cells 1 (hereinafter referred to as cells 1). The unit cell 1 and the mold portion B are plate-shaped with a structure in which the entire plate surface is bent. The thickness direction of the mold portion B or the unit cell 1 in the blade 100 may be along the axial direction of the tire (the direction of the central axis of the ring).

In a tire molding die for molding a tire tread, the blade 100 is fixed with the mold portion B disposed radially inside the tire and the base portion A disposed radially outward of the tire. The plate surface of the blade 100 is fixed to the tire mold along the circumferential direction of the tire. In the following, for convenience of explanation, the side of the base portion A viewed from the mold portion B, that is, the direction corresponding to the radially outer side of the tire is referred to as the upper side, and the direction corresponding to the radially outer side of the tire is referred to as the lower side. The direction along the radial direction of is defined as the vertical direction. Also, the direction along the circumferential direction of the tire will be described as the lateral direction.

The mold portion B is designed by a design method in which a mold (shape) that forms a basic shape for forming a sipe is defined as a cell 1, and the cells 1 are arranged to define the overall shape of the sipe. The mold portion B can be manufactured by arranging the cells 1 according to the desired sipe size (depth and width). The mold part B and the blade 100 having this can be output (constructed) by, for example, a 3D printer. That is, first, after determining the mold of the cells 1, the overall shape of the mold portion B is designed by arranging the molds. Then, the mold portion B can be manufactured by, for example, outputting it with a 3D printer according to the designed overall shape.

In this embodiment, the cells 1 may be formed in a rectangular shape when viewed from the front with respect to the plate surface. FIG. 1 illustrates the case where the cell 1 is square. In addition, the cells 1 can have a shape in which cells 1 having the same shape are arranged adjacent to each other and can be formed into a single plate. An example of another possible shape of the cell 1 is a hexagonal shape.

The shape of the mold of the cell 1 can take various forms according to the required specifications for each tire. Specific examples of the shape of the cell 1 and mold portion B according to the present embodiment will be described below.

(First embodiment)
FIGS. 2 and 3 show a wave-shaped cell 2 as an example of the cell 1 according to this embodiment. FIG. 3 is a view of the cell 2 shown in FIG. 2 as seen from the rear side.

The cell 2 is formed with thick portions 22 , 24 , 26 that are thicker than the other portions of the cell 2 . The thick portions 22, 24, 26 are formed as convex portions having vertices (ridge lines). Further, the cell 2 is formed with a bent portion 21 as a convex portion in the shape of a bent plate surface along the vertical direction. The bent portion 21 extends from the upper end to the lower end of the cell 2 . That is, the bent portion 21 is continuous from the upper end to the lower end of the cell 2 .

Thick portion 22 is formed to extend along the ridgeline of bent portion 21 . The ridgeline of the thick portion 22 and the ridgeline of the bent portion 21 are aligned. The thick portion 22 extends from the top end to the bottom end of the cell 2 . The thick portion 22 extends from the top end to the bottom end of the cell 2 . That is, the thick portion 22 is continuous from the upper end to the lower end of the cell 2 along the ridgeline of the bent portion 21 .

The thick portion 24 extends from the upper end to the lower end along the vertical direction at the lateral ends of the cells 2 . In this embodiment, thick portions 24, 24 are formed at both lateral end portions of the cell 2, respectively.

The thick portion 26 is formed to extend from one end to the other end in the horizontal direction. In this embodiment, thick portions 26 , 26 are arranged at the upper end portion and the lower end portion of the cell 2 .

A thin portion 23 extending in the vertical direction is formed between the thick portions 22 and 24 relative to the thickness of the thick portions 22 and 24 . Between the thick portions 26, 26 is a thin portion 25 extending in the lateral direction in terms of relative thickness to the thick portions 26, 26. As shown in FIG.

In FIG. 4, as an example, six cells 2 (two vertically adjacent and three horizontally adjacent) are arranged adjacent to each other, and the horizontal direction is the longitudinal direction. Part B is shown. When the cells 2 of the present embodiment are arranged adjacently, the ridgeline of the thick portion 22 formed along the curved portion 21 of each of the cells 2, 2 adjacent in the vertical direction is the upper end portion of the mold portion B. to the lower end. The number of arranged cells 2 is not limited to 6, and may be 5 or less or 7 or more.

Further, in the mold portion B formed by arranging the cells 2, the valleys of the thin portions 23 of the cells 2, 2 adjacent in the vertical direction extend continuously from the upper end portion to the lower end portion of the mold portion B. formed.

Further, in the mold portion B formed by arranging the cells 2, the thick portions 24, 24 formed at the ends of the laterally adjacent cells 2, 2 are opposed to each other, and integrally formed vertically. A curved portion 29 extending from the upper end to the lower end of the mold portion B is formed. The ridgeline of the bent portion 29 and the ridgeline of the opposed thick portions 24, 24 are made to coincide.

Further, in the mold portion B formed by arranging the cells 2, each thick portion 26 of each laterally adjacent cell 2 is formed so as to extend continuously from one lateral end to the other lateral end. ing. Similarly, each thin portion 25 of each cell 2 adjacent in the lateral direction is formed so as to extend continuously from one lateral end to the other lateral end of the mold portion B. As shown in FIG.

As described above, in the mold portion B of the present embodiment, when a certain cell 2 is the first cell and another cell 2 adjacent to the first cell 2 is the second cell, the first cell and the second cell Each edge with a cell is continuous.

Every time the tire is removed from the mold, the mold portion B is repeatedly subjected to external force from the sipes of the tire. Durability as strength, such as repeated fatigue life, is improved against the external force applied to the mold portion B when the tire is released from the mold.

In FIG. 5, regarding the sipe formed by the mold portion B shown in FIG. ) are in contact with each other, the shape of the space Ba that would remain in the sipe. In other words, FIG. 5 shows the shape of the space Ba that will always be ensured in the sipe when the tire having the sipe formed by the mold portion B shown in FIG. 4 is running.

5, each cell space 2a is part of the space within the sipe formed by the cells 2. In FIG. The space 22a is a space formed by the bent portion 21 of each cell 2 continuously extending from the upper end portion to the lower end portion of the mold portion B. As shown in FIG. Similarly, the space 26a is a space formed by the thick portion 26 of each cell 2 continuously extending from one end portion to the other end portion of the mold portion B in the left-right direction. Similarly, the space 29a is a space formed by the thick portion 24 (the bent portion 29 of the mold portion B, see FIG. 4). The spaces 22a and 29a are continuous in the vertical direction and extend from the upper end to the lower end of the sipe. The space 26a is laterally continuous and extends from one lateral end of the sipe to the other lateral end.

As shown in FIG. 5, in the sipe formed using the cells 2, it is possible to provide portions (spaces 22a, 26a, 29a) that become wider gaps than other portions in the groove of the sipe. As a result, when the sipe of the tread is deformed due to the deformation of the rubber of the tread of the tire when the tire is running, the portion with a narrow gap in the sipe (corresponding to the thin portions 23 and 25 of the mold portion B shown in FIG. 4) Wide gaps (spaces 22a, 26a, 29a) formed by the thick portions can remain in the gaps of the sipes even after the opposing inner surfaces come into contact with each other at the gaps formed by the sipes. As a result, the water sucked up from the road surface can flow through the gaps (spaces 22a, 26a, 29a). Further, the gaps (spaces 22a, 26a, 29a) between the portions of the sipe formed by the adjacent cells 2 in the mold portion B are formed as continuous spaces, and the continuous gaps are filled with water sucked up from the road surface. Since the water can flow, water can be supplied or drained appropriately between the sipes and the tread pattern. That is, in the mold portion B of the present embodiment, the strength can be improved, and the sipe supply/discharge and drainage performance can be improved.

(Second embodiment)
FIG. 6 shows, as an example of the cell 1 according to this embodiment, a wave-shaped cell 3 having a shape different from that of the first embodiment. In the following description, descriptions of portions similar to those of the first embodiment will be omitted as appropriate.

The cell 3 is formed with thick portions 32 , 34 , 36 , 38 that are thicker than other portions of the cell 3 . The thick portions 32, 34, 36, and 38 are formed as convex portions having vertices (ridge lines). Further, the cell 3 is formed with bent portions 31, 35, and 75 as convex portions formed by bending the plate surface.

The bent portion 31 extends continuously from the upper end to the lower end in the vertical direction. The bent portions 35 and 37 extend continuously from one end to the other end along the lateral direction. The bent portion 35 is bent in the direction opposite to the bent portion 37 . That is, when the bent portion 37 is a convex portion when viewed from the front, the bent portion 35 is a concave portion, and the bent portion 35 is a convex portion when viewed from the rear.

The thick portions 32 , 36 , 38 are continuous along the ridgelines of the bent portions 31 , 35 , 37 , respectively, and are formed to extend in the same range as the respective ridgelines. The ridgelines of the thick portions 32, 36, 38 and the ridgelines of the bent portions 31, 35, 37 are aligned.

The thick portion 34 extends from the upper end to the lower end along the vertical direction at the lateral end of the cell 2 . In this embodiment, thick portions 34, 34 are formed at both lateral end portions of the cell 2, respectively.

In the cell 3, portions other than the thick portions 32, 34, 36, and 38 are relatively thin portions as in the case of the cell 2 of the first embodiment. Description of each thin portion of the cell 3 is omitted.

FIG. 7 shows mold portions B formed by arranging six cells 3 adjacent to each other as an example. When the cells 3 of the present embodiment are arranged adjacently, the ridgeline of the thick portion 33 formed along the curved portion 31 of each of the cells 3, 3 adjacent in the vertical direction is the upper end portion of the mold portion B. to the lower end. In addition, when the cells 3 of the present embodiment are arranged adjacently, the ridgelines of the bent portions 35 and 37 formed along the bent portions 35 and 37 of the cells 3 and 3 adjacent in the lateral direction are shaped. It is formed so as to extend continuously from one end portion to the other end portion in the horizontal direction of the portion B. As shown in FIG.

Further, in the mold portion B formed by arranging the cells 3, the thick portions 34, 34 formed at the respective ends of the cells 3, 3 adjacent in the lateral direction are opposed to each other and integrally extend along the vertical direction. A bent portion 39 extending from the upper end to the lower end of the mold portion B is formed. The ridgeline of the bent portion 39 and the ridgeline of the opposed thick portions 34, 34 are made to coincide.

Further, in the mold portion B formed by arranging the cells 3, the thick portions 36 and 38 of the cells 3 adjacent in the horizontal direction extend continuously from one end portion to the other end portion in the horizontal direction. formed to exist.

FIG. 8 shows the shape of the space Ba with respect to the sipe formed by the mold portion B shown in FIG.

8, each cell space 3a is part of the space within the sipe formed by the cells 3. In FIG. A space 32 a is a space formed by the thick portion 32 . Similarly, spaces 36a and 38a are spaces formed by thick portions 36 and 38 . Similarly, the space 39a is a space formed by the thick portion 34 (the bent portion 39 of the mold portion B, see FIG. 7). The spaces 32a and 39a are continuous in the vertical direction and extend from the upper end to the lower end of the sipe. The spaces 36a, 38a are laterally continuous and extend from one lateral end of the sipe to the other lateral end. In the mold portion B of the present embodiment as well, the strength can be improved, and the sipe supply/discharge and drainage performance can be improved, as in the description of the first embodiment.

(Third embodiment)
9 and 10 show, as an example of the cell 1 according to this embodiment, a dimple-shaped cell 4 having a shape different from that of the above embodiment. FIG. 10 is a view of the cell 4 shown in FIG. 9 as seen from the rear side. As shown in FIGS. 9 and 10, the cells 4 are formed in a hexagonal shape when viewed from the front. In addition, the cell 4 has a smooth convex portion 4A (see FIG. 9) that protrudes to one side in the central portion when viewed from the front, and the opposite surface of the cell 4 has a concave portion in which the central portion in the front view (rear view) is smoothly recessed. 4B. In the following description, descriptions of portions similar to those of the first embodiment will be omitted as appropriate.

The cell 4 is formed with six thick portions 42 that are thicker than the rest of the cell 4 . The thick portion 42 is formed as a convex portion having a vertex (ridge line). The thick portion 42 protrudes on the same side of the plate surface of the cell 4 as the protruding side of the convex portion 4A. Also, the cell 4 is formed with six bent portions 41 as convex portions formed by bending the plate surface.

In FIG. 9, a virtual line R is shown along the ridgeline of the bent portion 41 . The ridgeline of the bent portion 41 is on the same side of the plate surface of the cell 4 as the side from which the convex portion 4A protrudes. The ridgeline of each bent portion 41 is the edge of the plate surface of the cell 4 and extends from the center of each side portion of the hexagonal shape of the cell 4 to the front of the convex portion 4A.

Each thick portion 42 is continuous along the ridgeline of each bent portion 41 and is formed to extend in the same range as the respective ridgeline. The ridgeline of the thick portion 42 and the ridgeline of the bent portion 41 are aligned.

In the cell 4, portions other than the thick portion 42 are relatively thin portions, as in the case of the cell 2 of the first embodiment. Description of each thin portion of the cell 4 is omitted.

FIG. 11 shows a mold portion B formed by arranging six cells 4 adjacent to each other in a triangular houndstooth pattern as an example. The cells 4 of the present embodiment are formed such that the ridgeline of each thick portion 42 is continuous with the ridgeline of the thick portion 42 of the adjacent cell 4 when the cells 4 are arranged adjacent to each other.

FIG. 12 shows the shape of the space Ba with respect to the sipe formed by the mold portion B shown in FIG.

12, each cell space 4a is part of the space within the sipe formed by the cells 4. In FIG. A space 42 a is a space formed by the thick portion 42 . Each space 42a forms a space Ba that continues in a net-like manner and extends to the upper and lower ends of the sipe and to both ends in the horizontal direction. In the mold portion B of the present embodiment as well, the strength can be improved, and the sipe supply/discharge and drainage performance can be improved, as in the description of the first embodiment.

As described above, it is possible to provide a method for designing a tire mold, a tire mold, and a method for manufacturing a tire mold.

It should be noted that the embodiments disclosed in this specification are exemplifications, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be applied to a method for designing a tire mold, a tire mold, and a method for manufacturing a tire mold.

1: cell (unit cell)
100: Blade (sipe blade, tire mold)
2: Cell 21 : Bent portion 22 : Thick portion 22a : Space 23 : Thin portion 24 : Thick portion 25 : Thin portion 26 : Thick portion 26a : Space 29 : Bent portion 29a : Space 2a : Cell space 3 : Cell 31: Bending portion 32: Thick portion 32a: Space 33: Thick portion 34: Thick portion 35: Bending portion 36: Thick portion 36a: Space 37: Bending portion 38: Thick portion 39: Bending portion 39a: Space 3a : Cell space 4 : Cell 41 : Bending portion 42 : Thick portion 42a : Space 4A : Convex portion 4B : Concave portion 4a : Cell space A : Base portion B : Mold portion Ba : Space R : Virtual line

Claims (11)

A method for designing a tire molding die for molding a tire having a sipe formed on the tread,
A method of designing a tire molding die, wherein a mold having a basic shape for forming the sipe is defined as a unit cell, and the unit cells are arranged to determine the overall shape of the sipe. 2. The tire molding die according to claim 1, wherein the unit cell is provided with a thick portion having a thickness relatively thicker than other portions of the unit cell in a direction along the axial direction of the tire. design method. 3. The method of designing a tire molding die according to claim 2, wherein a convex portion is formed on the unit cell and the convex portion is used as the thick portion. 4. The method for designing a tire mold according to claim 3, wherein the convex portion is formed continuously and the thick portion is provided along the ridge line of the convex portion. The first cell and the second unit cell are arranged such that the edges of the first cell, which is the first unit cell, and the second cell, which is the second unit cell adjacent to the first cell, are continuous. 5. The method for designing a tire mold according to claim 4, wherein a second cell is arranged. A tire mold for molding a tire having a sipe formed on the tread,
A mold for molding a tire in which molds having a basic shape for forming the sipe are arranged as unit cells. 7. The mold for molding a tire according to claim 6, wherein the unit cell is provided with a thick portion that is relatively thicker than other portions of the unit cell in a direction along the axial direction of the tire. . The mold for molding a tire according to claim 7, wherein a convex portion is formed on the unit cell, and the convex portion is the thick portion. The mold for molding a tire according to claim 8, wherein the convex portion is formed continuously, and the thick portion is provided along the ridgeline of the convex portion. The first cell and the second unit cell are arranged such that the edges of the first cell, which is the first unit cell, and the second cell, which is the second unit cell adjacent to the first cell, are continuous. 10. The mold for molding a tire according to claim 9, wherein two cells are arranged. A method for manufacturing a tire molding die for molding a tire having a sipe formed on the tread,
A method for manufacturing a tire molding die, in which a mold having a basic shape for forming the sipe is arranged as a unit cell.

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