JP2023094295A - Method for manufacturing metallic mold for manufacturing tire - Google Patents

Abstract

To provide a method for manufacturing a metallic mold for manufacturing a tire, the metallic mold comprising a void molding material which is excellent in accuracy of the positioning thereof.SOLUTION: A metallic mold 22 for manufacturing a tire comprises a metallic mold main body 40 for molding a tread surface, and a void molding material 42 which is composed of a material different from the metallic mold main body 40 and molds a void in the tread surface. The void molding material 42 is mounted to a rubber mold 50 while supported using a support member 66. Gypsum is flowed into the rubber mold 50 while the void molding material 42 is supported, and a gypsum casting mold 52 fixed with the void molding material 42 is manufactured. The metallic mold main body 40 to which the void molding material 42 is inserted is obtained by flowing metal into the gypsum casting mold 52.SELECTED DRAWING: Figure 6

Description

An embodiment of the present invention relates to a method for manufacturing a tire mold.

A mold for manufacturing the tread surface of a tire is generally made by pouring and casting metal into a gypsum mold. In addition, in a mold for manufacturing a tire having voids such as sipes on the tread surface, a void molding material for molding the voids may be made of a material different from that of the mold body. For example, the mold body is made of a soft metal such as aluminum for lightness, while the void forming material is made of a ferrous metal such as stainless steel from the viewpoint of strength. In that case, the void forming material is cast into the mold body when casting the mold body.

The following method is known as a method for producing a mold having such a void forming material. A void molding material is attached to a rubber mold, and gypsum is poured into the rubber mold to prepare a gypsum mold in which the void molding material is fixed. Then, after removing the rubber mold, the mold body is cast by pouring metal into the gypsum mold. After that, by removing the gypsum mold, a mold in which the void forming material is cast is obtained (see, for example, Patent Document 1).

JP-A-10-58458

When a gypsum mold is produced by attaching the void molding material to the rubber mold as described above, it is difficult to maintain the metal void molding material in a stable posture with respect to the rubber mold. If the posture of the void-forming material in the rubber mold is not stable, the positioning accuracy of the void-forming material in the gypsum mold is impaired, which in turn affects the positioning accuracy of the void-forming material in the tire manufacturing mold. In recent years, in order to improve tire performance, it has become mainstream to adopt narrower and deeper grooves on the tread surface, although they are wider than sipes. When forming such grooves with a void molding material, compared to molding a sipe, the void molding material becomes more difficult to stabilize its posture in the rubber mold due to its own weight, and the positioning accuracy of the void molding material in the gypsum mold is reduced. is impaired.

In view of the above points, an object of the embodiments of the present invention is to provide a method of manufacturing a tire manufacturing mold that is excellent in the positioning accuracy of the void molding material.

An embodiment of the present invention is a tire manufacturing mold comprising a mold body for molding a tread surface, and a void molding material made of a material different from the mold body and for molding voids in the tread surface. A mold manufacturing method. The manufacturing method includes attaching the void molding material to a rubber mold together with the support member in a state in which the void molding material is supported using a support member, and attaching gypsum to the rubber mold in a state in which the void molding material is supported. and casting the mold body in which the void molding material is cast by pouring metal into the gypsum mold.

In one embodiment, the support member is attached to the rubber mold in a state of protruding from the molding surface of the rubber mold, thereby producing the gypsum mold in a state in which the protruding part is embedded, and the mold body A part of the support member protruding from the tread molding surface of the mold body may be removed after casting. In that case, the support member may have a breaking portion for removing the part, and the breaking portion may break the support member to remove the part after casting the mold body.

In one embodiment, the support member may be attached to the rubber mold without protruding from the molding surface of the rubber mold. In this case, the support member may support the void molding material in a range of 70 to 95% in the depth direction from the deepest portion of the portion where the void molding material is embedded in the rubber mold.

In one embodiment, the support member may be made of the same material as the mold body.

In one embodiment, a plurality of void molding materials may be provided in the mold body, and each void molding material may be supported by a plurality of support members.

In one embodiment, the support member may have a shape in which both sides in the width direction are connected across the deepest portion of the portion where the void molding material is embedded in the rubber mold.

In the embodiment of the present invention, a gypsum mold is produced by pouring gypsum into the rubber mold while supporting the void molding material using a support member for the rubber mold, so the posture of the void molding material in the rubber mold is It is stabilized and can improve the positioning accuracy of the void forming material in the gypsum mold.

Half sectional view of tire vulcanizer Schematic diagram for explaining a manufacturing process of a tire manufacturing mold according to one embodiment. A perspective view of the original mold in the first embodiment. FIG. 4 is a perspective view showing a process of manufacturing a rubber mold according to the first embodiment; The perspective view of the rubber mold in the first embodiment. FIG. 2 is a perspective view showing a process for producing a gypsum mold according to the first embodiment; The perspective view of the gypsum mold in the first embodiment A perspective view showing a casting process of the mold body in the first embodiment. FIG. 2 is a perspective view showing a step of taking out the tire manufacturing mold in the first embodiment; Sectional views around the void molding material in each manufacturing process of the tire manufacturing mold according to the first embodiment. FIG. 2 is an enlarged perspective view of a main part of the gypsum mold in the first embodiment; Cross-sectional views around the void molding material in each manufacturing process of the tire manufacturing mold according to the second embodiment. FIG. 11 is an enlarged perspective view of a main part of a gypsum mold according to a second embodiment; An enlarged perspective view of a main part of a gypsum mold according to a third embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of a tire vulcanizing apparatus 10 for vulcanizing and molding a pneumatic tire. A tire vulcanizing apparatus 10 includes a vulcanization mold 12, a container 14 to which the vulcanization mold 12 is attached, and a bladder 16, and vulcanizes an unvulcanized tire while molding it into a predetermined shape.

The vulcanization mold 12 includes a pair of upper and lower side plates 18, 20, a plurality of sectors 22 divided in the circumferential direction, and a pair of upper and lower bead rings 24, 26, and molds the outer surface of the tire T. The sector 22 is a mold for molding the tread surface T1 of the tire T, is divided into a plurality of parts in the tire circumferential direction, and is provided so as to be expandable and contractible in the tire radial direction.

The container 14 includes a plurality of segments 28 that hold the sectors 22, a jacket ring 30 that moves the segments 28 in the tire radial direction, and a pair of upper and lower mounting plates 32,34. The jacket ring 30 moves the segments 28 in the radial direction of the tire by moving up and down relative to the segments 28 , thereby allowing the sectors 22 to expand and contract in the radial direction of the tire. The upper mounting plate 32 is configured to move up and down with respect to the lower mounting plate 34 by a lifting device (not shown).

The bladder 16 is made of a toroidal expandable and contractible rubber elastic body, is arranged on the inner surface side of the tire T, and pressurizes the tire T from the inside by being inflated by being supplied with pressurized gas.

A method of manufacturing the sector 22, which is a mold for molding the tread surface T1 (that is, the design surface of the tread) of the tire T, will be described below. The side plates 18, 20 and the bead rings 24, 24, which are molds other than the sector 22, can be manufactured according to a conventional method. In the following description, the sectors 22 are referred to as "tire manufacturing molds 22" or simply "molds 22".

The mold 22 includes a mold body 40 for molding the tread surface T1 and a void molding material 42 for molding voids in the tread surface T1 (see FIG. 9). A plurality of void forming materials 42 are usually cast around the mold body 40 . Casting generally refers to obtaining a cast product integrated with the main body by pouring molten metal around dissimilar members. It refers to obtaining the mold 22 in which the void molding material 42 is integrated.

The mold body 40 is made of soft metal such as aluminum or aluminum alloy. The mold body 40 has a tread molding surface 40A for molding the tread surface T1. The tread molding surface 40A is provided with ribs 44 for molding main grooves, that is, circumferential grooves (reference numeral T2 in FIG. 1) on the tread surface T1. The rib 44 is a ridge projecting from the tread molding surface 40</b>A and extending in the tire circumferential direction, and is formed integrally with the mold body 40 .

The void molding material 42 is made of a material different from that of the mold main body 40, and is preferably made of a ferrous metal such as stainless steel from the viewpoint of strength. Examples of the voids formed by the void molding material 42 include various depressions provided on the tread surface T1, preferably groove-like depressions such as sipes and narrow grooves. Here, the sipe is a cut having a groove width of 2 mm or less, and is also called a kerf. A narrow groove is a groove narrower than the main groove, for example, a groove with a width of 5 mm or less. The sipes and narrow grooves may extend in the tire circumferential direction or may extend in the tire width direction. A portion of the void forming material 42 that protrudes from the mold body 40 to form the void is called a forming portion 42A, and a portion that is embedded in the mold main body 40 is called an embedding portion 42B.

When forming a groove-shaped recess, the void forming material 42 is plate-shaped. In the example shown in FIG. 9, the void molding material 42 has a flat plate shape, but the shape of the void molding material 42 is not limited to a flat plate shape. For example, when the recess to be molded has a curved linear shape in plan view (opening shape), the void molding material 42 may have a curved plate shape. If the recesses to be molded are linear with bent portions in plan view, the void molding material 42 may be plate-like with bent portions. If the recesses to be molded are corrugated in plan view, the void forming material 42 may be corrugated.

FIG. 2 shows an outline of the manufacturing method of the mold 22, including the following steps.
Step 1. Fabrication of prototype 46 (see FIG. 2(A))
Step 2. Attachment of mounting hole forming material 48 to master 46 (see FIG. 2(B))
Step 3. Production of rubber mold 50 (see FIGS. 2(C) and 2(D))
Step 4. Attaching the void molding material 42 to the rubber mold 50 (see FIG. 2(E))
Step 5. Preparation of gypsum mold 52 (see FIG. 2(F))
Step 6. Casting of the mold 22 (see FIGS. 2(G) to (I)).

In step 1 shown in FIG. 2A, a master mold 46 is produced. The master mold 46 is a mold (tire model) having the same shape as the tread molded by the mold 22, and a molding surface 46A corresponding to the tread surface T1 (the surface of the master mold 46 for molding the rubber mold 50). have. The prototype 46 can be produced by cutting the tread design using, for example, engineering wood or gypsum.

In process 2, as shown in FIG. The mounting hole forming material 48 is a member for forming a mounting hole 54 (FIG. 2(E)) for mounting the void forming material 42 on the rubber mold 50 .

FIG. 3 is a perspective view showing the original mold 46 to which the mounting hole forming material 48 is attached. In FIG. 3, the unevenness of the molding surface 46A and the mounting hole forming material 48 are indicated by solid lines so that the molding surface 46A and the mounting hole forming material 48 on the lower surface side can be seen through. The mounting surface of 48 is indicated by dashed lines (same in FIG. 4).

In this example, the mounting hole molding material 48 is attached to the molding surface 46A of the master mold 46 using an adhesive or the like. The mounting hole molding material 48 may be mounted by providing a groove in the molding surface 46A and partially embedding the mounting hole molding material 48 in the groove. The mounting hole molding material 48 has a shape corresponding to the embedded portion 42B of the void molding material 42 at the portion protruding from the molding surface 46A.

In step 3, as shown in FIG. 2(C), a rubber material such as silicone rubber is poured into the original mold 46 to which the mounting hole molding material 48 is attached, and the molding surface 46A is covered and filled with the rubber material. A mold 50 is made. Specifically, as shown in FIG. 4, a master mold 46 is placed in a mold 56 for molding the rubber mold 50, the mold is closed, and a rubber material is filled in a space 58 between the mold 56 and the master mold 46. Allow to flow and cure the rubber material. Thereafter, the rubber mold 50 is obtained by demolding as shown in FIG. 2(D). A plurality of mounting holes 54 are provided on the molding surface 50A of the obtained rubber mold 50 (the surface of the rubber mold 50 for molding the gypsum mold 52), as shown in FIG.

In step 4, as shown in FIG. 2(E), the void molding material 42 is inserted into the mounting hole 54 of the rubber mold 50 and mounted. As a result, as shown in FIG. 6, the void molding material 42 is partly embedded in the rubber mold 50 (embedded portion 42B) and the remaining portion (molded portion 42A) protrudes from the molding surface 50A. It is fixed to the rubber mold 50 .

In step 5, as shown in FIG. 2(F), gypsum is poured into a rubber mold 50 fitted with a void forming material 42 to produce a gypsum mold 52 to which the void forming material 42 is fixed. Specifically, as shown in FIG. 6, the rubber mold 50 is placed in a mold 60 for molding the gypsum mold 52, the mold is closed, and gypsum is poured onto the molding surface 50A of the rubber mold 50 and hardened. At that time, the void molding material 42 is fixed in a state in which a part thereof is embedded in the gypsum mold 52 . After that, the gypsum mold 52 is obtained by demolding.

FIG. 7 is a perspective view showing a gypsum mold 52. FIG. A void molding material 42 is fixed to the molding surface 52A of the gypsum mold 52 (the surface of the gypsum mold 52 for molding the mold 22). In FIG. 7, the unevenness of the molding surface 52A and the void molding material 42 are indicated by solid lines so that the molding surface 52A and the void molding material 42 on the lower surface side can be seen through. The embedded portion is indicated by a dashed line (same in FIG. 8).

In step 6, as shown in FIGS. 2(G) and 2(H), molten metal is poured into a gypsum mold 52 in which the void forming material 42 is fixed, thereby forming a mold in which the void forming material 42 is cast. A body 40 is cast. Specifically, as shown in FIG. 8, the gypsum mold 52 is placed in a mold 62 for molding the mold 22, the mold is closed, and the space 64 between the mold 62 and the gypsum mold 52 is filled with molten metal. Pour hot water. After being solidified by cooling, the mold is opened as shown in FIG. 9 and the gypsum mold 52 is destroyed. As a result, the mold 22 is formed as shown in FIG. 2(I), and is then given a final shape by machining, final polishing, and the like.

In the manufacturing method as described above, in the first embodiment, as shown in FIG. 6 and FIGS. 42 is attached to the rubber mold 50 together with the support member 66, and gypsum is poured into the rubber mold 50 in this state to prepare the gypsum mold 52 in which the void forming material 42 is fixed.

The support member 66 is a member embedded in the rubber mold 50 together with the void molding material 42 to support the attitude of the void molding material 42 projecting from the molding surface 50A of the rubber mold 50 . By supporting the void molding material 42 in this way, the posture of the void molding material 42 can be stabilized when the gypsum is poured into the rubber mold 50 . Therefore, the positioning accuracy of the void-forming material 42 in the gypsum mold 52 can be improved, and the positioning accuracy of the void-forming material 42 cast in the mold body 40 can be improved.

In this example, the support members 66 are provided in contact with both side surfaces of the void forming material 42 so as to support the plate-shaped void forming material 42 from both sides thereof. More specifically, as shown in FIGS. 6 and 10C, the support member 66 straddles the deepest part of the void forming material 42 embedded in the rubber mold 50 and is connected to both sides in the width direction. It has a shape. That is, the support member 66 includes a pair of rod-shaped support bars 66A, 66A extending in the depth direction along both side surfaces of the void molding material 42 at the buried portion 42C of the void molding material 42, and extending to the deepest part of the buried portion 42C. It has a shape connected by a connecting part 66B that straddles the part. Therefore, the support member 66 has a so-called U-shape or C-shape. By having a shape in which both sides are connected in this manner, the positioning accuracy of the void molding material 42 can be further enhanced.

In this embodiment, the support member 66 is made of the same material as the mold body 40, that is, made of a soft metal such as aluminum or an aluminum alloy. As a result, for example, when the support member 66 is exposed on the tread molding surface 40A of the mold 22, the surface finishing of the tread molding surface 40A is facilitated, and the influence of the transfer onto the tire T on the tire appearance quality is minimized. can do.

One support member 66 may be provided for each void molding material 42 , but preferably each void molding material 42 is supported by a plurality of support members 66 . Thereby, the positioning accuracy of the void forming material 42 can be further improved. In the example shown in FIG. 6, each void molding material 42 is supported by two support members 66, 66, and the support members 66 are arranged at both ends of the void molding material 42 in the longitudinal direction.

Here, the both ends of the void forming material 42 are within 30% of the total length L from both ends of the void forming material 42 in the longitudinal direction, when the dimension in the longitudinal direction of the void forming material 42 is defined as the total length L (see FIG. 11). means the range (L1) of The support members 66 are preferably installed at positions 10 to 30% of the total length L from both ends of the void molding material 42 . More preferably, the support member 66 is provided not only at the both ends but also at the central portion in the longitudinal direction to support the void forming material 42 at three locations in the longitudinal direction.

As described above, in the present embodiment, the support member 66 is used to support the void molding material 42. Therefore, it is preferable that the mounting hole molding material 48 is attached to the original mold 46 in step 2 as follows. As shown in FIG. 3, a protrusion 68 corresponding to the shape of the support member 66 is provided on the mounting hole forming member 48 . The projection 68 is for forming an insertion recess 70 (see FIG. 5) into which the support member 66 is inserted in the rubber mold 50. As shown in FIG.

By providing the projections 68 on the mounting hole molding material 48, the rubber material is filled along the shape thereof as shown in FIG. 10(A). Therefore, as shown in FIGS. 10B and 5, the mounting hole 54 formed in the molding surface 50A of the rubber mold 50 has a shape corresponding to the embedded portion 42B of the void molding material 42, and the support member 66 It has an insertion recess 70 for the .

Next, in step 4, as shown in FIGS. 10(C) and 6, the support member 66 and the void molding material 42 are inserted into the mounting holes 54 and mounted. At that time, since the insertion recess 70 is formed as described above, these can be attached without gaps.

In the first embodiment, the support member 66 is attached to the rubber mold 50 while protruding from the molding surface 50A of the rubber mold 50 . That is, the support member 66 has a portion 66C protruding from the molding surface 50A, and the void molding material 42 is also supported by the protruding portion 66C. Therefore, the positioning accuracy of the void molding material 42 can be further improved.

The portion 66C exposed to the outside from the rubber mold 50 is embedded in the gypsum mold 52 as shown in FIGS. Therefore, as shown in FIG. 11, the gypsum mold 52 is produced with the part 66C of the support member 66 embedded together with the molded portion 42A of the void molding material 42. As shown in FIG.

Next, in step 6, when the molten metal is poured into the gypsum mold 52, the portion exposed from the molding surface 52A of the gypsum mold 52 is embedded in the mold body 40 as shown in FIG. 10(F). . Therefore, as shown in FIGS. 10G and 9, the part 66C of the support member 66 embedded in the gypsum mold 52 protrudes from the tread molding surface 40A together with the molding portion 42A of the void molding material 42. Therefore, as shown in FIG. 10(H), after casting the mold body 40, the portion 66C of the protruding support member 66 is removed.

As shown in FIG. 10(G), the support member 66 is preferably provided with a breaking portion 72 for removing the portion 66C. The breaking portion 72 may have various configurations for facilitating the removal of the portion 66C from the support member 66, and in this example is configured by a notch.

12A to 12H are cross-sectional views of the main parts for explaining the manufacturing process of the mold 22 according to the second embodiment, and FIG. 13 is a perspective view of the main parts of the gypsum mold 52 in the second embodiment. It is a diagram.

In the second embodiment, as shown in FIG. 12(C), the support member 66X is attached to the rubber mold 50 without protruding from the molding surface 50A of the rubber mold 50. It is different from the support member 66 of the first embodiment, which is attached to the rubber mold 50 in a state where it is folded.

Specifically, as in the first embodiment, the support member 66X has a shape in which the void molding material 42 is embedded in the rubber mold 50 at the portion 42C and is connected to both sides in the width direction across the deepest part. support bars 66A, 66A and a connecting portion 66B. However, unlike the support member 66 of the first embodiment, the length of the support bars 66A on both sides is different from that of the support member 66 in the first embodiment. ing. Therefore, a hollow portion 74 is provided between the tip 66X1 of the support member 66X (the tip of the support bar 66A) and the molding surface 50A. The hollow portion 74 is provided as an open end portion of the insertion recess 70, and is formed wider than the portion where the support member 66X is fitted in this example.

As shown in FIGS. 12(A) and 12(B), similarly to the first embodiment, a mounting hole forming member 48 provided with projections 68 corresponding to the shape of a support member 66X is attached to a master mold 46, and rubber A mold 50 is made. The void forming material 42 is inserted and attached together with the support member 66X into the attachment hole 54 having the insertion recess 70 formed thereby. At that time, in the second embodiment, as shown in FIG. 12(C), a hollow portion 74 is formed between the tip 66X1 of the support member 66X and the molding surface 50A.

Next, when the gypsum mold 52 is produced in step 5, in the second embodiment, as shown in FIG. The tip 66X1 is located away from the molding surface 52A of the gypsum mold 52. As shown in FIG. Specifically, as shown in FIGS. 12(E) and 13, on the molding surface 52A of the gypsum mold 52, a gypsum projection 76 protruding from the molding surface 52A is molded by a hollow portion 74, and the tip 66X1 of the support member 66X is formed on the molding surface 52A. is located on the upper surface of the gypsum projection 76 . Therefore, in this example, after the gypsum mold 52 is demolded and taken out, the gypsum projections 76 are scraped and removed as shown in FIG. 12(F).

Thereafter, in step 6, when molten metal is poured into the gypsum mold 52, as shown in FIGS. There is no support member 66X exposed on the surface 40A. That is, the void molding material 42 protrudes from the tread molding surface 40A, but the support member 66X installed to support it is entirely embedded in the mold body 40 and is not exposed to the tread molding surface 40A. Therefore, deterioration of tire appearance quality can be suppressed.

In the second embodiment, the support member 66X preferably supports the void molding material 42 in a range of 70 to 95% in the depth direction from the deepest part 42C of the void molding material 42 embedded in the rubber mold 50. That is, in the embedded portion 42C of the void molding material 42, the depth of the molding surface 50A from the deepest portion is D0, and the range supported by the support member 66X (range from the deepest portion to the tip 66X1) D1 is 70 of D0. ~95% is preferred. By supporting 70 to 95% of the region from the deepest part with the support member 66X in this way, the effect of not exposing the support member 66X to the tread molding surface 40A is ensured while ensuring the function of supporting the void molding material 42. be able to.

Regarding the second embodiment, other configurations including the support member 66X are basically the same as the support member 66 and other configurations of the first embodiment except for the above points, and description thereof is omitted.

FIG. 14 is a perspective view of essential parts of a gypsum mold 52 according to the third embodiment. The third embodiment is different from the support member 66 of the first embodiment in that the support member 66Y is not connected to both sides of the void forming material 42 in the width direction. That is, in the third embodiment, the support member 66Y is composed of a pair of rod-shaped support bars 66A, 66A that support the void molding material 42 from both sides thereof, and both are provided separately. Although only the support member 66Y on the front side is shown in FIG. 14, a similar support member 66Y is arranged on the opposite side.

The support member 66Y is attached to the rubber mold 50 in a state of protruding from the molding surface 50A of the rubber mold 50, so that the gypsum mold 52 is manufactured in a state in which a part 66C of the protruding support member 66Y is embedded; Also, the part 66C of the support member 66Y protruding from the tread molding surface 40A of the mold body 40 is removed after the mold body 40 is cast, as in the first embodiment.

Regarding the third embodiment, other configurations including the support member 66Y are basically the same as the support member 66 and other configurations of the first embodiment except for the above points, and the description thereof is omitted.

The above embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention.

22... tire manufacturing mold, 40... mold body, 40A... tread molding surface, 42... void molding material, 42A... embedding portion, 50... rubber mold, 50A... molding surface, 52... gypsum mold, 52A... molding surface , 66, 66X, 66Y... Support member, 72... Broken portion

Claims (8)

A method for manufacturing a tire mold, comprising: a mold body for molding a tread surface; and a void molding material made of a material different from that of the mold body and for molding voids on the tread surface. ,
attaching the void molding material to the rubber mold together with the support member in a state in which the void molding material is supported by the support member;
Preparing a gypsum mold in which the void molding material is fixed by pouring gypsum into the rubber mold while the void molding material is supported;
Casting the mold body in which the void forming material is cast by pouring metal into the gypsum mold;
A method of manufacturing a mold for manufacturing a tire, comprising: The support member is attached to the rubber mold in a state of protruding from the molding surface of the rubber mold, thereby producing the gypsum mold in a state in which the protruding part is embedded, and after casting the mold body, the mold 2. The method of manufacturing a tire manufacturing mold according to claim 1, wherein a portion of said support member protruding from the tread molding surface of the main body is removed. 3. The tire manufacture according to claim 2, wherein the support member has a breaking portion for removing the portion, and the breaking portion breaks the support member to remove the portion after casting of the mold body. method of manufacturing molds for 2. The method of manufacturing a mold for manufacturing a tire according to claim 1, wherein the support member is attached to the rubber mold without protruding from the molding surface of the rubber mold. 5. The tire manufacturing metal according to claim 4, wherein the support member supports the void molding material in a range of 70 to 95% in the depth direction from the deepest part at the portion where the void molding material is embedded in the rubber mold. How the mold is made. The method of manufacturing a tire manufacturing mold according to any one of claims 1 to 5, wherein the support member is made of the same material as the mold main body. The method for manufacturing a tire manufacturing mold according to any one of claims 1 to 6, wherein a plurality of said void molding materials are provided in said mold main body, and each void molding material is supported by a plurality of said support members. The tire manufacture according to any one of claims 1 to 7, wherein the support member has a shape that is connected to both sides in the width direction across the deepest part at the portion where the void molding material is embedded in the rubber mold. method of manufacturing molds for

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