JP2023087828A - Side mold and tire molding mold - Google Patents

Abstract

To facilitate replacement of spare pieces.SOLUTION: A side mold 20 disclosed herein includes: a side mold body 22 which is attached to a mold base 12 of a vulcanizer 1 and has an annular molding surface 20a1 for molding a sidewall part of a tire; a side piece 24 that is attached to the side mold body 22 from an outside in a radial direction and that constitutes a part of the annular molding surface 20a1 that molds the sidewall part of the tire; and a spare piece 26 forming part of a molding surface 20a2 of the side piece 24. The side mold body and the side piece have a first mounting structure that allows the side piece to be mounted and removed from an outer peripheral side surface of the side mold body. The side piece and the spare piece have a second mounting structure that allows the spare piece to be attached and detached from the side opposite to the molding surface of the side piece.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to side molds and tire molds.

Information such as the name of the tire, the manufacturer, the size of the tire, the year of manufacture, and the serial number is displayed on the sidewall portion of the tire. The information is displayed by providing unevenness on the side mold for molding the sidewall portion of the tire and transferring the unevenness to the sidewall portion during vulcanization. At that time, a spare piece that can be attached to and removed from the side mold can be used. The spare piece may be provided with unevenness for transferring information to the tire. By exchanging spare pieces, information to be displayed can be changed for each tire.

WO 2017/041134 discloses a tire vulcanization mold with an annular side mold having a side molding surface for molding a sidewall portion of a tire. The side mold disclosed in the publication includes a side mold body having a concave portion provided on the side molding surface, a part of the side molding surface that is fitted in the concave portion, and an exhaust air between the side mold body and the wall surface of the concave portion. and a spare piece for information display, which is closely fitted without a gap to a mounting hole provided on the side molding surface. The spare piece is provided inside the side piece or inside the side mold body so as not to straddle the side piece and the side mold body. Such tire vulcanization molds are said to facilitate assembly work when disassembled and reassembled for cleaning, etc., and improve workability.

WO2017/041134

The inventor of the present invention wants to easily replace spare pieces.

The side mold disclosed here is attached to a mold base of a vulcanizer and includes a side mold body having an annular molding surface for molding the sidewall portion of a tire, and a side mold body having a radially outward direction. It is provided with a side piece that is attached to form a part of an annular forming surface for forming a sidewall portion of the tire, and a replacement piece that forms a part of the forming surface of the side piece. The side mold body and the side piece have a first mounting structure that allows the side piece to be mounted and removed from the outer peripheral side surface of the side mold body. The side piece and the replacement piece have a second attachment structure that allows attachment and detachment of the replacement piece from the side opposite to the molding surface of the side piece.
In the side mold having such a configuration, the replacement piece can be easily replaced.

FIG. 1 is a cross-sectional view showing an example of a tire mold 10. As shown in FIG. FIG. 2 is a cross-sectional view showing an example of the tire mold 10. As shown in FIG. FIG. 3 is a schematic diagram showing the side mold 20. As shown in FIG. FIG. 4 is a schematic diagram showing the side mold 20. As shown in FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4. FIG. 6 is a sectional view taken along line VI-VI of FIG. 4. FIG.

An embodiment of the present disclosure will be described below based on the drawings. Note that the present disclosure is not limited to the following embodiments. Each drawing is schematically drawn and does not necessarily reflect the real thing. Each drawing only shows an example and does not limit the present disclosure unless otherwise specified. Further, members and portions that perform the same functions are given the same reference numerals as appropriate, and overlapping descriptions are omitted.

1 and 2 are cross-sectional views showing an example of a tire mold 10. FIG. FIG. 1 shows the state before the raw cover 60 is vulcanized. FIG. 1 shows a state in which the raw cover 60 is set in the tire mold 10 and the bladder 58 is inflated. FIG. 2 shows a state in which the raw cover 60 is vulcanized.

<Vulcanizer 1>
The vulcanizer 1 is a device for vulcanizing and molding the raw cover 60 to manufacture a tire. The raw cover 60 is an unvulcanized tire before vulcanization molding, and is also called a raw tire. The raw cover 60 is a cylindrical member in which unvulcanized sidewall rubber or tread rubber is bonded to a base material such as a bead wire, carcass or belt. A bead portion is provided on both peripheral edge portions of the raw cover 60 . The raw cover 60 is composed of, for example, a first cover and a second cover. The first cover includes an inner liner, a carcass, a bead portion and sidewall portions. The second cover includes a breaker and a tread portion. The second cover is overlaid on the outside of the first cover.

As shown in FIG. 1 , the vulcanizer 1 includes a tire vulcanization mold 10 and a bladder center mechanism 50 . The raw cover 60 is vulcanized with its inner surface held by the bladder 58 of the bladder center mechanism 50 and its outer surface pressed against the tire vulcanization mold 10 (see FIG. 2).

The vulcanizer 1 further comprises mold bases 12 and 14, a pusher 16 and a slider 18. As shown in FIG. The mold base 12 is supported by, for example, a table of a press machine. The mold base 14 is attached to, for example, a press plate of a press machine. The mold base 14 is provided above the mold base 12 . A tire mold 10 is attached to mold bases 12 and 14 of the vulcanizer 1 . The tire mold 10 includes side molds 20 and 30 and a tread mold 40, which will be described later. A side mold 20 is attached to the mold base 12 . A side mold 30 is attached to the mold base 14 . A tread mold 40 is attached to the slider 18 .

The slider 18 is configured to move radially in and out along the lower surface of the mold base 14 . The outer surface of the slider 18 is formed with a tapered surface that widens outward toward the bottom. The pusher 16 is a member extending downward to contact the tapered surface of the slider 18 . The pusher 16 has a tapered surface that widens outward toward the bottom so as to face the tapered surface of the slider 18 . The contact between the tapered surface of the pusher 16 and the tapered surface of the slider 18 causes the slider 18 to move in and out. During vulcanization, the press machine narrows the distance between the mold bases 12 and 14, and the pusher 16 moves the slider 18 radially inward. The tire mold 10 is thereby closed as shown in FIG.

<Bladder center mechanism 50>
The bladder center mechanism 50 includes a center post 52 , a pair of clamp rings 54 and 56 and a bladder 58 . The bladder 58 is an elastic body made of rubber. A pair of clamp rings 54 and 56 are members for gripping the upper end peripheral edge portion and the lower end peripheral edge portion of the bladder 58, respectively. The upper clamp ring 56 is a disk-shaped member attached to the upper end of the center post 52 . The lower clamp ring 54 is a disc-shaped member with an open center. The lower clamp ring 54 is mounted on the bead ring 28, which will be described later. The center post 52 is inserted through the opening 54a of the clamp ring 54 on the lower side. The center post 52 is a shaft-like member that supports the upper clamp ring 56 . The center post 52 is attached to a lifting mechanism (not shown) below. The lifting mechanism can be composed of, for example, a cylinder mechanism. The distance between the clamp rings 54 and 56 can be changed by moving the center post 52 up and down by the lifting mechanism. During vulcanization, the gap between the clamp rings 54 and 56 is narrowed in conjunction with the closing of the tire molding die 10 (see FIG. 2).

During vulcanization, a high-temperature fluid can be introduced from the opening 54 a of the clamp ring 54 toward the internal space of the bladder 58 . When hot fluid is introduced into the space inside bladder 58, bladder 58 expands. Thereby, the raw cover 60 held by the bladder 58 is pressed against the tire molding die 10 and heated and pressurized. Thereby, the raw cover 60 is vulcanized and the tire is manufactured.

<Tire mold 10>
A tire vulcanization mold 10 used in the vulcanizer 1 will be described below.
The tire vulcanization mold 10 is a mold for molding the outer shape of a vulcanized tire. As shown in FIG. 1 , the tire mold 10 includes side molds 20 and 30 and a tread mold 40 . The side mold 20 is a mold member that molds the lower side wall portion 64 (see FIG. 2) of the raw cover 60 held by the bladder 58 . The side mold 30 is a mold member that molds the side wall portion 64 on the upper side of the low cover 60 held by the bladder 58 . A sidewall portion of a tire is a portion forming both side surfaces of the tire. The sidewall portions 64 of the low cover 60 are each formed in an annular shape.

The tread mold 40 is a mold member that molds the tread portion 62 (see FIG. 2) on the outer diameter side surface of the low cover 60 held by the bladder 58 . A tread portion of a tire is a portion that constitutes a portion that comes into contact with a road surface. The tread portion of the tire extends axially inward from the radially outer ends of the pair of sidewall portions. A tread portion 62 of the low cover 60 is formed in a cylindrical shape.

<Side mold 20>
The side mold 20 includes a side mold body 22, a side piece 24 and a replacement piece 26. - 特許庁3 and 4 are schematic diagrams showing the side mold 20. FIG. 3 and 4 show the side mold 20 in plan view. FIG. 3 shows the side mold 20 with the side piece 24 removed from the side mold body 22 . FIG. 4 shows a state in which the side mold body 22 and the side piece 24 are attached. 5 and 6 are cross-sectional views of the side mold 20. FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4. FIG. 6 is a sectional view taken along line VI-VI of FIG. 4. FIG. FIG. 5 shows the mounting structure of the side mold body 22 and the side piece 24. As shown in FIG. In FIG. 6, the mounting structure of the side piece 24 and the spare piece 26 is illustrated. In addition, since the side mold 30 can have the same configuration as the side mold 20 described below, detailed description thereof will be omitted.

As described above, the side mold 20 forms the sidewall portion 64 on the lower side of the low cover 60 (see FIG. 2). The side mold 20 has a molding surface 20a for molding the sidewall portion 64 into an annular shape. As shown in FIG. 3, the annular molding surface 20a is composed of a side mold main body 22, a side piece 24 and a spare piece 26. As shown in FIG.

The side mold 20 is attached to the vulcanizer 1 via the side mold body 22 . The side mold body 22 is attached to the mold base 12 of the vulcanizer 1 (see FIG. 1). A method for attaching the side mold body 22 is not particularly limited. The side mold body 22 may be attached to the mold base 12 with bolts or the like, for example.

<Side mold body 22>
The side mold body 22 has a molding surface 20a1. The molding surface 20a1 constitutes a part of the molding surface 20a on which the sidewall portion 64 is molded. As shown in FIG. 3, the side mold body 22 has a molding surface 20a1. The side mold body 22 is formed in an annular shape. The side mold body 22 is provided with a stepped portion 22b to which a bead ring 28 is attached (see FIG. 1). The bead ring 28 is a part that holds the lower bead portion of the low cover 60 . The stepped portion 22b is provided radially inward on the surface opposite to the surface attached to the mold base 12 . The stepped portion 22b is provided in an annular shape.

As shown in FIG. 3, the side mold body 22 has a first recess 22a. The first concave portion 22 a is formed in the outer peripheral portion of the side mold body 22 . The first recessed portion 22a is a portion that is recessed radially inward from the outer peripheral side surface of the side mold body 22 . The first recess 22a is a fan-shaped portion recessed from the outer peripheral surface of the side mold main body 22 in plan view. The first concave portion 22a is formed by an arc-shaped inner peripheral surface formed radially inward and a flat side surface connecting the inner peripheral surface and the outer peripheral side surface. The side mold body 22 has a plurality of first recesses 22a. The first recesses 22 a are provided intermittently along the circumferential direction in the outer peripheral portion of the side mold body 22 . The side piece 24 is accommodated in the first recess 22a. A side piece 24 is attached to the side mold body 22 from the radially outer side.

<Side piece 24>
The side piece 24 has a molding surface 20a2. As shown in FIG. 4, the molding surface 20a2 forms part of the molding surface 20a for molding the sidewall portion 64. As shown in FIG. The side piece 24 is sized slightly smaller than the first recess 22a so as to be accommodated in the first recess 22a. The side piece 24 is attached to the side mold main body 22 while being accommodated in the first recess 22a. By attaching the side piece 24 to the side mold main body 22, the outer peripheral side surface of the side mold 20 continues in a circular shape. By attaching the side piece 24 to the side mold body 22, an annular molding surface 20a is formed.

The side piece 24 has a second recess 24a. The second recess 24a is formed downward from the molding surface 20a2 of the side piece 24 (see FIG. 5). Although the position of the second recess 24a is not particularly limited, in this embodiment, the second recess 24a is formed in the central portion of the side piece 24 in plan view. A replacement piece 26 is accommodated in the second recess 24a. The second concave portion 24 a has a shape corresponding to the spare piece 26 . The shape of the opening of the second recess 24a is not particularly limited. In this embodiment, the opening of the second recess 24a has an oval shape consisting of a pair of parallel lines along the circumferential direction of the side mold 20 and a pair of semicircles connecting the ends of the parallel lines. The bottom surface of the second recess 24a is flat and has a shape corresponding to the opening.

<Replacement piece 26>
The spare piece 26 constitutes a part of the molding surface 20a2 of the side piece 24. As shown in FIG. The spare piece 26 has a forming surface 20a3. The molding surface 20a3 constitutes a part of the molding surface 20a on which the sidewall portion 64 is molded. The molding surface 20a3 of the replacement piece 26 is formed with unevenness corresponding to the information displayed on the sidewall portion of the tire. By transferring the unevenness to the low cover 60, information can be displayed on the sidewall portion of the tire. By exchanging the replacement piece 26, the above information can be changed according to the tire to be vulcanized. The replacement piece 26 is preferably set to a size that can be accommodated in the second recess 24a.

When replacing the spare piece 26 , first, the side piece 24 is removed from the side mold main body 22 of the side mold 20 . Next, the replacement piece 26 attached to the side piece 24 is replaced. As shown in FIGS. 4 and 5, the side mold body 22 and side piece 24 are provided with a first mounting structure 23 . The first attachment structure 23 is a structure for attaching and detaching the side piece 24 to and from the side mold body 22 . The first mounting structure 23 is configured such that the side piece 24 can be mounted and removed from the outer peripheral side surface of the side mold body 22 . As shown in FIG. 6, the side piece 24 and the spare piece 26 are provided with a second mounting structure 25. As shown in FIG. The second attachment structure 25 is a structure for attaching and detaching the spare piece 26 to and from the side piece 24 . The second mounting structure 25 is configured so that the spare piece 26 can be mounted to and removed from the side piece 24 from the side opposite to the molding surface 20a2.

<First mounting structure 23>
The first mounting structure 23, as shown in FIG. 4, includes a first bolt 23a, a first insertion hole 23b, and a first mounting hole 23c. In this embodiment, two first bolts 23a, two first insertion holes 23b, and two first mounting holes 23c, which constitute the first mounting structure 23, are provided for one side piece 24. there is

The first bolt 23 a is a bolt for attaching the side piece 24 to the side mold body 22 . The side piece 24 is formed with a first insertion hole 23b through which the first bolt is inserted. The first insertion hole 23b penetrates the side piece 24 in the radial direction. The side mold body 22 is formed with a first mounting hole 23c into which a first bolt 23a is mounted. The length of the first bolt 23a is preferably such that it is inserted through the first insertion hole 23b and reaches the first mounting hole 23c. The side piece 24 is provided with a counterbore 23d for accommodating the head of the first bolt 23a. 23 d of counterbore is provided in the outer peripheral side surface of the site|part in which the 1st insertion hole 23b of the side piece 24 was formed. As a result, the head of the first bolt 23 a does not protrude from the outer peripheral side surface of the side mold 20 .

The position where the first mounting structure 23 is provided is not particularly limited. In this embodiment, the side piece 24 is attached to the side mold body 22 by two first bolts 23a. The two first bolts 23a pass outside both end portions of the spare piece 26 in the circumferential direction. Each of the first bolts 23 a is inserted in the vicinity of the middle between one end of the replacement piece 26 and the end of the side piece 24 in the circumferential direction of the side mold 20 . The first bolt 23a can be inserted at a position approximately 10 mm or more and 15 mm or less from one end of the spare piece 26 and the end of the side piece 24, for example. The positions of the first insertion hole 23b and the first mounting hole 23c can be set so that the first bolt 23a passes through such a position.

<Second mounting structure 25>
The second mounting structure 25, as shown in FIG. 6, includes a second bolt 25a, a second insertion hole 25b, and a second mounting hole 25c. The second bolt 25 a is a bolt for attaching the spare piece 26 to the side piece 24 . The side piece 24 is formed with a second insertion hole 25b through which a second bolt is inserted. The second insertion hole 25b penetrates through the bottom surface of the second recess 24a of the side piece 24 . The replacement piece 26 is formed with a second mounting hole 25c into which the second bolt 25a is mounted. The length of the second bolt 25a is preferably such that it is inserted through the second insertion hole 25b and reaches the second mounting hole 25c. The side piece 24 is provided with a counterbore 25d for accommodating the head of the second bolt 25a. The counterbore 25d is provided on the surface of the side piece 24 opposite to the molding surface 20a2.

The position and number of the second bolts 25a penetrated are not particularly limited. In this embodiment, the spare piece 26 is attached to the side piece 24 with two second bolts. As shown in FIG. 4, the two second bolts 25a are attached near the ends of the spare piece 26, respectively.

The first mounting structure 23 and the second mounting structure 25 are provided at positions that do not interfere with each other. The first insertion hole 23b and the second insertion hole 25b are formed at different positions in the side piece 24 so that the first bolt 23a and the second bolt 25a do not interfere with each other.

By the way, from the viewpoint of maintaining the appearance quality of the tire surface, the spare piece can be attached from the surface opposite to the molding surface. In that case, for example, replacing the replacement piece after removing the entire side mold from the tire molding die may take time and labor.

In the embodiment described above, the side mold body 22 and the side piece 24 are provided with the first mounting structure 23 that allows the side piece 24 to be mounted and removed from the outer peripheral side surface of the side mold body 22 . The side piece 24 and the replacement piece 26 are provided with a second mounting structure 25 that allows the replacement piece 26 to be attached and detached from the side opposite to the molding surface of the side piece 24 . In the side mold 20 having such a configuration, first, the side piece 24 is removed from the outer peripheral side surface of the side mold main body 22 by the first mounting structure 23 . With the side piece 24 removed, the second mounting structure 25 allows the replacement piece 26 to be replaced from the surface opposite to the molding surface 20a2. Therefore, the replacement piece 26 can be replaced even when the side mold 20 is fixed to the vulcanizer 1 . Therefore, the replacement piece 26 can be easily replaced. Moreover, the replacement piece 26 can be replaced even during tire production.

In the above-described embodiment, the side mold main body 22 has the first concave portion 22a that is recessed radially inward in the outer peripheral portion, and the side piece 24 is housed in the first concave portion 22a. With such a configuration, the side piece 24 can be slid radially outward and removed from the side mold body 22 . Therefore, the side piece 24 can be easily removed.

In the above-described embodiment, the first mounting structure 23 includes the first bolt 23a for mounting the side piece 24 to the side mold main body 22, and the first insertion hole that radially penetrates the side piece 24 and through which the first bolt 23a is inserted. 23b, and a first mounting hole 23c formed in the side mold body 22 and into which the first bolt 23a is mounted. With such a configuration, the side piece 24 can be stably attached to the side mold body 22 .

In the above-described embodiment, the side piece 24 is attached to the side mold main body 22 by the plurality of first bolts 23a from the outside of both ends of the spare piece 26 in the circumferential direction. Since the side piece 24 is attached to the plurality of first bolts 23a so as to sandwich the replacement piece 26, the side piece 24 and the side mold body 22 are less likely to be displaced when they are attached or detached. Therefore, attachment and detachment workability can be improved.

The second mounting structure 25 for mounting the replacement piece 26 includes a second bolt 25a for attaching the replacement piece 26 to the side piece 24, and a second bolt 25a through which the second bolt 25a is inserted through the bottom surface of the second recess 24a of the side piece 24. It has an insertion hole 25b and a second mounting hole 25c formed in the replacement piece 26 and into which the second bolt 25a is mounted. With such a configuration, the spare piece 26 can be stably attached to the side piece 24 .

According to the inventor's trials, it took about 30 minutes to remove the side mold from the vulcanizer and replace the spare piece. In the vulcanizer 1 including the side mold 20 disclosed here, the time required for replacement work of the spare piece 26 was shortened to about 5 minutes. Also, when the tire was vulcanized using the vulcanizer 1 including the side mold 20, the quality of the tire was good. The inventor vulcanized and molded 1500 tires using the vulcanizer 1 . In this case as well, no quality defects resulting from air leakage from the tire vulcanization mold 10 and quality defects resulting from rubber protruding from gaps between members of the tire vulcanization mold 10 were not observed.

Various descriptions have been made above regarding the side mold and the tire molding die disclosed herein. However, the side molds and tire molds disclosed herein are not limited to the above-described embodiments and modifications unless otherwise specified. In addition, various configurations of the embodiments and modified examples can be appropriately combined as long as they do not hinder each other. This specification includes the following disclosure, which is not limited to the embodiments described above.

This disclosure (1) relates to a side mold. The side mold in the present disclosure is
a side mold body attached to the mold base of the vulcanizer and having an annular molding surface for molding the sidewall portion of the tire;
a side piece that is attached to the side mold body from the radially outer side and that constitutes a part of an annular molding surface that molds the sidewall portion of the tire;
a replacement piece that constitutes a part of the molding surface of the side piece,
The side mold body and the side piece have a first mounting structure capable of mounting and removing the side piece from the outer peripheral side surface of the side mold body,
The side piece and the replacement piece have a second mounting structure that allows the replacement piece to be attached and detached from the side opposite to the molding surface of the side piece.

The present disclosure (2) is the side mold described in the present disclosure (1), wherein the side mold body has a first concave portion that is concave radially inward in an outer peripheral portion, and the side piece includes: , is housed in the first recess.

The present disclosure (3) is the side mold described in the present disclosure (1) or (2), wherein the first mounting structure includes a first bolt that mounts the side piece to the side mold body; A first insertion hole through which the first bolt is inserted through the side piece in a radial direction, and a first mounting hole formed in the side mold body and into which the first bolt is mounted are provided.

The present disclosure (4) is the side mold described in the present disclosure (3), wherein the side piece is attached to the side mold main body by a plurality of first bolts from the outside of both ends of the spare piece in the circumferential direction. can be attached to

(5) of the present disclosure is the side mold according to any one of (1) to (4) of the present disclosure, wherein the side piece has the replacement piece accommodated in the molding surface of the side piece. It has a second recess.

The present disclosure (6) is the side mold according to the present disclosure (5), wherein the second mounting structure includes a second bolt for mounting the spare piece to the side piece, and the second bolt of the side piece. It has a second insertion hole that penetrates the bottom surface of the recess and through which the second bolt is inserted, and a second mounting hole that is formed in the spare piece and into which the second bolt is mounted.

This disclosure (7) is a tire mold including the side mold described in any one of this disclosure (1) to (6).

1 vulcanizer 10 tire molds 12, 14 mold bases 20, 30 side mold 20a molding surface 22 side mold main body 22a first concave portion 22b step portion 23 first mounting structure 23a first bolt 23b first insertion hole 23c 1 mounting hole 24 side piece 24a second recess 25 second mounting structure 25a second bolt 25b second insertion hole 25c second mounting hole 26 replacement piece 28, 38 bead ring 40 tread mold 50 bladder center mechanism 52 center post 54, 56 Clamp ring 58 Bladder 60 Low cover 62 Tread 64 Side wall

Claims (7)

a side mold body attached to the mold base of the vulcanizer and having an annular molding surface for molding the sidewall portion of the tire;
a side piece that is attached to the side mold body from the radially outer side and that constitutes a part of an annular molding surface that molds the sidewall portion of the tire;
a replacement piece that constitutes a part of the molding surface of the side piece,
The side mold body and the side piece have a first mounting structure capable of mounting and removing the side piece from the outer peripheral side surface of the side mold body,
A side mold, wherein the side piece and the replacement piece are provided with a second mounting structure capable of attaching and detaching the replacement piece from a surface opposite to the molding surface of the side piece. 2. The side mold according to claim 1, wherein the side mold main body has a first recess that is recessed radially inward in an outer peripheral portion, and the side piece is accommodated in the first recess. The first mounting structure includes:
a first bolt that attaches the side piece to the side mold body;
a first insertion hole that radially penetrates the side piece and through which the first bolt is inserted;
3. The side mold according to claim 1, further comprising a first mounting hole formed in said side mold body and into which said first bolt is mounted. 4. The side mold according to claim 3, wherein the side piece is attached to the side mold main body by a plurality of the first bolts from the outside of both end portions of the spare piece in the circumferential direction. The side mold according to any one of claims 1 to 4, wherein the side piece has a second recess in which the spare piece is accommodated in the molding surface of the side piece. The second mounting structure is
a second bolt for attaching the spare piece to the side piece;
a second insertion hole that penetrates the bottom surface of the second recess of the side piece and through which the second bolt is inserted;
6. The side mold according to claim 5, further comprising a second mounting hole formed in said spare piece and into which said second bolt is mounted. A tire mold comprising the side mold according to any one of claims 1 to 6.

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