Side molds and tire molding dies

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

[Technical Field]

[0001] The present disclosure relates to a side mold and a tire molding tool. [Background technology]

[0002] The sidewall of a tire displays information such as the tire name, manufacturer, tire size, production year, and serial number. This information is displayed by forming protrusions and recesses in the side mold that forms the tire's sidewall, and then transferring the protrusions and recesses to the sidewall during vulcanization. A replacement piece that can be attached to and detached from the side mold may be used for this purpose. The replacement piece may be provided with protrusions and recesses for transferring the information to the tire. By replacing the replacement piece, the information displayed on each tire can be changed.

[0003] International Publication No. 2017 / 041134 discloses a tire curing mold equipped with an annular side mold having a side molding surface for molding the sidewall portion of a tire. The side mold disclosed in this publication includes a side mold main body having a recessed portion formed in the side molding surface, a side piece that fits into the recessed portion to form a part of the side molding surface and forms an exhaust gap between the side piece and the wall of the recessed portion, and a replacement piece for displaying information that fits tightly and without a gap into an attachment hole formed in the side molding surface. The replacement piece is located within the side piece or the side mold main body so as not to straddle the side piece and the side mold main body. This tire curing mold is said to facilitate assembly when disassembling and reassembling for cleaning, etc., improving workability. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2017 / 041134 Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors wish to make it easier to replace spare pieces. [Means for solving the problem]

[0006] The side mold disclosed herein includes a side mold body that is attached to the mold base of a vulcanizer and has an annular molding surface that molds the sidewall portion of a tire, a side piece that is attached to the side mold body from the radial outside and forms part of the annular molding surface that molds the sidewall portion of the tire, and a replacement piece that forms part of the molding surface of the side piece. The side mold body and side piece have a first attachment structure that allows the side piece to be attached and removed from the outer peripheral side surface of the side mold body. The side piece and replacement piece have a second attachment structure that allows the replacement piece to be attached and removed from the surface of the side piece opposite the molding surface. In a side mold having such a configuration, the replacement piece can be easily replaced. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a cross-sectional view showing an example of a tire molding mold 10. As shown in FIG. [Figure 2] FIG. 2 is a cross-sectional view showing an example of a tire molding mold 10. As shown in FIG. [Figure 3] FIG. 3 is a schematic diagram showing the side mold 20. As shown in FIG. [Figure 4] FIG. 4 is a schematic diagram showing the side mold 20. As shown in FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV of FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to the following embodiment. Each drawing is a schematic representation and does not necessarily reflect the actual product. Furthermore, each drawing shows only an example and does not limit the present disclosure unless otherwise specified. Furthermore, components and parts that perform the same function are appropriately designated by the same reference numerals, and redundant explanations will be omitted.

[0009] 1 and 2 are cross-sectional views showing an example of a tire mold 10. Fig. 1 shows a state before a 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 being vulcanized.

[0010] <Vulcanizer 1> The vulcanizer 1 is a device for vulcanizing and molding a raw cover 60 to manufacture a tire. The raw cover 60 is an unvulcanized tire before vulcanization and is also called a green tire. The raw cover 60 is a tubular component in which unvulcanized sidewall rubber and tread rubber are bonded to a base material such as a bead wire, carcass, or belt. Bead portions are provided on the peripheral edges of both sides 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 a sidewall portion. The second cover includes a breaker and a tread portion. The second cover is layered on the outside of the first cover.

[0011] As shown in Fig. 1, the vulcanizer 1 includes a tire vulcanizing 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 vulcanizing mold 10 (see Fig. 2).

[0012] The vulcanizer 1 further includes mold bases 12 and 14, a pusher 16, and a slider 18. 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 the press machine. The mold base 14 is provided above the mold base 12. The tire mold 10 is attached to the mold bases 12 and 14 of the vulcanizer 1. The tire mold 10 includes side molds 20 and 30, which will be described later, and a tread mold 40. The side mold 20 is attached to the mold base 12. The side mold 30 is attached to the mold base 14. The tread mold 40 is attached to the slider 18.

[0013] The slider 18 is configured to move radially inward and outward along the underside of the mold base 14. The outer surface of the slider 18 is formed with a tapered surface that widens outward as it extends downward. The pusher 16 is a member that extends downward to contact the tapered surface of the slider 18. The pusher 16 is formed with a tapered surface that widens outward as it extends downward, facing the tapered surface of the slider 18. The slider 18 moves inward and outward as the tapered surface of the pusher 16 comes into contact with the tapered surface of the slider 18. During vulcanization, the press narrows the gap between the mold bases 12, 14, and the pusher 16 moves the slider 18 radially inward. This closes the tire mold 10, as shown in FIG. 2.

[0014] <Bladder center mechanism 50> The bladder center mechanism 50 includes a center post 52, a pair of clamp rings 54, 56, and a bladder 58. The bladder 58 is an elastic body made of rubber. The pair of clamp rings 54, 56 are members that grip the upper and lower peripheral edges of the bladder 58, respectively. The upper clamp ring 56 is a disc-shaped member that is attached to the upper end of the center post 52. The lower clamp ring 54 is a disc-shaped member with an opening in the center. The lower clamp ring 54 is attached to the bead ring 28 (described later). The center post 52 is inserted into an opening 54a of the lower clamp ring 54. The center post 52 is a shaft-shaped member that supports the upper clamp ring 56. The center post 52 is attached to a lifting mechanism (not shown) at its lower end. The lifting mechanism may be, for example, a cylinder mechanism. The distance between the clamp rings 54, 56 can be changed by raising and lowering the center post 52 using the lifting mechanism. During vulcanization, the distance between the clamp rings 54, 56 narrows as the tire mold 10 closes (see FIG. 2).

[0015] During vulcanization, a high-temperature fluid can be introduced into the space inside the bladder 58 from the opening 54a of the clamp ring 54. When the high-temperature fluid is introduced into the space inside the bladder 58, the bladder 58 expands. As a result, the raw cover 60 held in the bladder 58 is pressed against the tire mold 10 and is heated and pressurized. As a result, the raw cover 60 is vulcanized and molded, and a tire is manufactured.

[0016] <Tire molding mold 10> The tire vulcanizing mold 10 used in the vulcanizer 1 will be described below. The tire vulcanization mold 10 is a mold that forms the external shape of a tire after vulcanization. As shown in FIG. 1, the tire molding mold 10 includes side molds 20, 30 and a tread mold 40. The side mold 20 is a mold member that forms the lower sidewall portion 64 (see FIG. 2) of the low cover 60 held by the bladder 58. The side mold 30 is a mold member that forms the upper sidewall portion 64 of the low cover 60 held by the bladder 58. The sidewall portion of a tire is a portion that constitutes both side surfaces of the tire. The sidewall portions 64 of the low cover 60 are each formed into an annular shape.

[0017] The tread mold 40 is a mold member that forms a tread portion 62 (see FIG. 2) on the outer diameter side surface of the raw cover 60 held by the bladder 58. The tread portion of a tire is the portion that forms the part that comes into contact with the road surface. The tread portion of a tire extends from the radially outer ends of a pair of sidewall portions toward the axially inner side. The tread portion 62 of the raw cover 60 is formed into a cylindrical shape.

[0018] <Side Mold 20> The side mold 20 includes a side mold main body 22, a side piece 24, and a replacement piece 26. FIGS. 3 and 4 are schematic diagrams showing the side mold 20. FIGS. 3 and 4 show the side mold 20 in a plan view. FIG. 3 shows the side mold 20 with the side piece 24 removed from the side mold main body 22. FIG. 4 shows the side mold main body 22 and the side piece 24 attached. FIGS. 5 and 6 are cross-sectional views of the side mold 20. FIG. 5 is a cross-sectional view taken along line V-V in FIG. 4. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 4. FIG. 5 shows the attachment structure of the side mold main body 22 and the side piece 24. FIG. 6 shows the attachment structure of the side piece 24 and the replacement piece 26. The side mold 30 can have a configuration similar to that of the side mold 20 described below, and therefore detailed description thereof will be omitted.

[0019] As described above, the side mold 20 forms the lower sidewall portion 64 of the lower cover 60 (see FIG. 2). The side mold 20 has a molding surface 20a that forms the sidewall portion 64 in an annular shape. As shown in FIG. 3, the annular molding surface 20a is composed of the side mold main body 22, the side piece 24, and the replacement piece 26.

[0020] The side mold 20 is attached to the vulcanizer 1 via a side mold body 22. The side mold body 22 is attached to a mold base 12 of the vulcanizer 1 (see FIG. 1). The 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.

[0021] <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 that molds the sidewall portion 64. As shown in FIG. 3, the side mold body 22 has the molding surface 20a1. The side mold body 22 is formed in an annular shape. The side mold body 22 is provided with a step portion 22b to which a bead ring 28 is attached (see FIG. 1). The bead ring 28 is a portion that holds the bead portion on the lower side of the low cover 60. The step portion 22b is provided radially inward on the surface opposite to the surface that is attached to the mold base 12. The step portion 22b is provided in an annular shape.

[0022] As shown in FIG. 3 , the side mold body 22 has a first recess 22a. The first recess 22a is formed on the outer periphery of the side mold body 22. The first recess 22a is a portion recessed radially inward from the outer peripheral side surface of the side mold body 22. In a plan view, the first recess 22a is a portion recessed in a fan shape from the outer peripheral surface of the side mold body 22. The first recess 22a is formed by an arc-shaped inner peripheral surface formed on the radially inner side 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 22a are provided intermittently along the circumferential direction on the outer periphery of the side mold body 22. A side piece 24 is accommodated in the first recess 22a. The side piece 24 is attached to the side mold body 22 from the radially outer side.

[0023] <Side Piece 24> The side piece 24 has a molding surface 20a2. As shown in FIG. 4, the molding surface 20a2 constitutes a part of the molding surface 20a that molds the sidewall portion 64. The side piece 24 is set to have dimensions slightly smaller than the first recess 22a so that it can 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 becomes circumferentially continuous. Furthermore, by attaching the side piece 24 to the side mold main body 22, an annular molding surface 20a is formed.

[0024] 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). The position of the second recess 24a is not particularly limited, but in this embodiment, the second recess 24a is formed in the center of the side piece 24 in a plan view. The replacement piece 26 is accommodated in the second recess 24a. The second recess 24a has a shape corresponding to the replacement 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 is oval-shaped and is made up of a pair of parallel lines extending 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.

[0025] <Replacement piece 26> The replacement piece 26 forms part of the molding surface 20a2 of the side piece 24. The replacement piece 26 has a molding surface 20a3. The molding surface 20a3 forms part of the molding surface 20a that molds the sidewall portion 64. The molding surface 20a3 of the replacement piece 26 is formed with irregularities that correspond to the information to be displayed on the sidewall portion of the tire. By transferring these irregularities to the row cover 60, the information can be displayed on the sidewall portion of the tire. By replacing the replacement piece 26, the above information can be changed depending on the tire being vulcanized and molded. The replacement piece 26 is preferably set to a size that can be accommodated in the second recess 24a.

[0026] When replacing the replacement 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 main body 22 and the side piece 24 are provided with a first mounting structure 23. The first mounting structure 23 is a structure for attaching and detaching the side piece 24 to and from the side mold main body 22. The first mounting structure 23 is configured to allow the side piece 24 to be attached and detached from the outer peripheral side surface of the side mold main body 22. As shown in FIG. 6 , the side piece 24 and the replacement piece 26 are provided with a second mounting structure 25. The second mounting structure 25 is a structure for attaching and detaching the replacement piece 26 to and from the side piece 24. The second mounting structure 25 is configured to allow the replacement piece 26 to be attached to and detached from the surface of the side piece 24 opposite the molding surface 20a2.

[0027] <First mounting structure 23> 4, the first mounting structure 23 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 are provided for one side piece 24.

[0028] The first bolt 23a is a bolt for attaching the side piece 24 to the side mold main body 22. A first insertion hole 23b, through which the first bolt is inserted, is formed in the side piece 24. The first insertion hole 23b penetrates the side piece 24 in the radial direction. A first mounting hole 23c, through which the first bolt 23a is mounted, is formed in the side mold main body 22. The length of the first bolt 23a is preferably long enough to be inserted into the first insertion hole 23b and reach the first mounting hole 23c. The side piece 24 is provided with a counterbore 23d that accommodates the head of the first bolt 23a. The counterbore 23d is provided on the outer circumferential side surface of the side piece 24 at the location where the first insertion hole 23b is formed. This prevents the head of the first bolt 23a from protruding from the outer circumferential side surface of the side mold 20.

[0029] The position at which the first mounting structure 23 is provided is not particularly limited. In this embodiment, the side piece 24 is attached to the side mold main body 22 by two first bolts 23a. The two first bolts 23a pass outside both ends of the replacement piece 26 in the circumferential direction. Each of the first bolts 23a is inserted near the midpoint 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 bolts 23a can be inserted, for example, at a position approximately 10 mm to 15 mm from one end of the replacement piece 26 and the end of the side piece 24. The positions of the first insertion hole 23b and the first mounting hole 23c can be set so that the first bolts 23a pass through these positions.

[0030] <Second mounting structure 25> As shown in FIG. 6, the second mounting structure 25 includes a second bolt 25a, a second insertion hole 25b, and a second mounting hole 25c. The second bolt 25a is a bolt for attaching the replacement piece 26 to the side piece 24. The side piece 24 is formed with a second insertion hole 25b through which the second bolt is inserted. The second insertion hole 25b penetrates 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 through which the second bolt 25a is attached. The second bolt 25a is preferably long enough to be inserted through the second insertion hole 25b and reach the second mounting hole 25c. The side piece 24 is provided with a counterbore 25d that accommodates the head of the second bolt 25a. The counterbore 25d is provided on the surface of the side piece 24 opposite the molding surface 20a2.

[0031] The positions through which the second bolts 25a pass and the number of bolts 25a are not particularly limited. In this embodiment, the replacement piece 26 is attached to the side piece 24 by two second bolts. As shown in Fig. 4, the two second bolts 25a are attached near the ends of the replacement piece 26.

[0032] The first mounting structure 23 and the second mounting structure 25 are provided in positions where they do not interfere with each other. The first insertion hole 23b and the second insertion hole 25b are formed in different positions in the side piece 24 so that the first bolt 23a and the second bolt 25a do not interfere with each other.

[0033] However, in order to maintain the quality of the tire surface appearance, the replacement piece may be attached from the side opposite the molding surface. In this case, replacing the replacement piece may require time and effort, for example, by removing the entire side mold from the tire molding die before replacing the replacement piece.

[0034] In the above-described embodiment, the side mold main body 22 and the side piece 24 are provided with a first mounting structure 23 that allows the side piece 24 to be attached to and detached from the outer peripheral side surface of the side mold main 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 to and detached from the surface of the side piece 24 opposite the molding surface. In a side mold 20 having such a configuration, the side piece 24 is first 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 replacement piece 26 can be replaced from the surface opposite the molding surface 20a2 by the second mounting structure 25. This allows the replacement piece 26 to be replaced even while the side mold 20 remains fixed to the vulcanizer 1. This allows for easy replacement of the replacement piece 26. Furthermore, the replacement piece 26 can be replaced even during tire production.

[0035] In the above-described embodiment, the side mold main body 22 has a first recess 22a recessed radially inward on the outer periphery, and the side piece 24 is housed in the first recess 22a. With this configuration, the side piece 24 can be slid radially outward to be removed from the side mold main body 22. This makes it easy to remove the side piece 24.

[0036] In the above-described embodiment, the first mounting structure 23 includes a first bolt 23a that mounts the side piece 24 to the side mold main body 22, a first insertion hole 23b that radially penetrates the side piece 24 and into which the first bolt 23a is inserted, and a first mounting hole 23c that is formed in the side mold main body 22 and into which the first bolt 23a is mounted. With this configuration, the side piece 24 can be stably mounted to the side mold main body 22.

[0037] In the embodiment described above, the side piece 24 is attached to the side mold main body 22 by the multiple first bolts 23a from outside both ends of the replacement piece 26 in the circumferential direction. Because the side piece 24 is attached to the multiple first bolts 23a so as to sandwich the replacement piece 26, the side piece 24 is less likely to become misaligned when being attached or detached from the side mold main body 22. This can improve the ease of attachment and detachment.

[0038] The second mounting structure 25 for mounting the replacement piece 26 includes a second bolt 25a for mounting the replacement piece 26 to the side piece 24, a second insertion hole 25b that penetrates the bottom surface of the second recess 24a of the side piece 24 and through which the second bolt 25a is inserted, and a second mounting hole 25c that is formed in the replacement piece 26 and into which the second bolt 25a is mounted. With this configuration, the replacement piece 26 can be mounted stably to the side piece 24.

[0039] According to trials conducted by the inventors, it took approximately 30 minutes to remove a side mold from a vulcanizer and replace the replacement piece 26. With the vulcanizer 1 including the side mold 20 disclosed herein, the time required to replace the replacement piece 26 was reduced to approximately 5 minutes. Furthermore, when tires were vulcanized using the vulcanizer 1 including the side mold 20, the quality of the tires was also good. The inventors vulcanized 1,500 tires using the vulcanizer 1. Even in this case, no quality defects due to air leaking from the tire vulcanization mold 10 or rubber protruding from gaps between the components of the tire vulcanization mold 10 were observed.

[0040] The side mold and tire molding die disclosed herein have been described in various ways. However, the side mold and tire molding die disclosed herein are not limited to the above-described embodiments and modifications unless otherwise specified. Furthermore, the configurations of the various described embodiments and modifications can be combined as appropriate as long as they do not interfere with each other. This specification includes the following disclosure, but the following disclosure is not limited to the above-described embodiments.

[0041] The present disclosure (1) relates to a side mold. The side mold in the present disclosure is a side mold body attached to a mold base of a vulcanizer and having an annular molding surface for molding a sidewall portion of a tire; a side piece attached to the side mold body from the radially outer side and constituting a part of an annular molding surface that molds a sidewall portion of the tire; a replacement piece that constitutes a part of the molding surface of the side piece; Equipped with the side mold body and the side piece have a first attachment structure that allows the side piece to be attached to and detached from an outer peripheral side surface of the side mold body, The side piece and the replacement piece are provided with a second attachment structure that allows the replacement piece to be attached and detached from the surface of the side piece opposite to the molding surface.

[0042] The present disclosure (2) is a side mold described in the present disclosure (1), wherein the side mold body has a first recess recessed radially inward on the outer periphery, and the side piece is accommodated in the first recess.

[0043] The present disclosure (3) is a side mold described in the present disclosure (1) or (2), wherein 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, and a first mounting hole that is formed in the side mold body and through which the first bolt is attached.

[0044] The present disclosure (4) is a side mold described in the present disclosure (3), wherein the side piece is attached to the side mold body by a plurality of the first bolts from outside both ends of the replacement piece in the circumferential direction.

[0045] The present disclosure (5) is a side mold described in any one of the present disclosures (1) to (4), wherein the side piece has a second recess in the molding surface of the side piece in which the replacement piece is accommodated.

[0046] The present disclosure (6) is a side mold described in the present disclosure (5), wherein the second mounting structure includes a second bolt that mounts the replacement 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, and a second mounting hole that is formed in the replacement piece and through which the second bolt is mounted.

[0047] The present disclosure (7) is a tire mold including the side mold described in any one of the present disclosures (1) to (6). [Explanation of symbols]

[0048] 1. Vulcanizer 10 Tire molding mold 12,14 Mold base 20,30 Side mold 20a Molding surface 22 Side mold body 22a First recess 22b Step part 23 First mounting structure 23a First bolt 23b First insertion hole 23c First 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 pieces 28,38 bead ring 40 Tread mold 50 Bladder center mechanism 52 Center Post 54,56 Clamp ring 58 Brada 60 Low Cover 62 Tread section 64 Sidewall

Claims

1. a side mold body attached to a mold base of a vulcanizer and having an annular molding surface for molding a sidewall portion of a tire; a side piece attached to the side mold body from the radially outer side and constituting a part of an annular molding surface that molds a sidewall portion of the tire; a replacement piece that constitutes a part of the molding surface of the side piece; Equipped with the side mold body and the side piece have a first attachment structure that allows the side piece to be attached to and detached from an outer peripheral side surface of the side mold body, The side piece and the replacement piece are provided with a second attachment structure that allows the replacement piece to be attached and detached from a surface of the side piece opposite to the molding surface, 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; a first mounting hole formed in the side mold body and into which the first bolt is mounted; Equipped with Side mold.

2. The side mold according to claim 1 , wherein the side mold body has a first recess in an outer periphery thereof recessed radially inward, and the side piece is housed in the first recess.

3. 3. The side mold according to claim 1, wherein the side piece is attached to the side mold body by a plurality of the first bolts from outside both ends of the replacement piece in the circumferential direction.

4. 4. The side mold according to claim 1, wherein the side piece has a second recess in a molding surface of the side piece, in which the replacement piece is accommodated.

5. The second mounting structure includes: a second bolt for attaching the replacement piece to the side piece; a second insertion hole that penetrates a bottom surface of the second recess of the side piece and through which the second bolt is inserted; a second mounting hole formed in the replacement piece and into which the second bolt is mounted; The side mold of claim 4 , comprising:

6. A tire mold comprising the side mold according to any one of claims 1 to 5.

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