JP3217843U - Tire vulcanization mold equipment - Google Patents

Abstract

[PROBLEMS] To reduce the number of repairs and prolong the service life by preventing wear and damage to segments, as well as to prevent defective tires as products due to wear of segments, and to assemble by closing each segment Provided is a tire vulcanization mold apparatus capable of improving the assembly accuracy and stability of an annular mold.
A tire vulcanizing mold apparatus (1) comprising an upper mold (5), a lower mold (6), a plurality of segments (7) constituting an annular split mold, and an outer ring (4). The strength reinforcing members 20 are provided on the contact surfaces 7 a and 7 b that contact the upper mold 5 and the lower mold 6.
[Selection] Figure 4

Description

  The present invention relates to a tire vulcanization mold apparatus, and more particularly to a tire vulcanization mold apparatus for vulcanizing automobile tires and the like.

2. Description of the Related Art Conventionally, as a mold apparatus for molding an automobile tire, a mold apparatus called a tire vulcanization mold for molding a tire while vulcanizing the tire has been provided. The tire vulcanizing mold apparatus includes an annular mold that molds the tread portion of the tire.
In recent years, as the annular mold for forming the tread portion of the tire, an annular mold formed by dividing the annular mold into a plurality of parts in the circumferential direction is often used. Each of these divided molds is referred to as a segment. As a tire vulcanization mold provided with such an annular mold composed of a plurality of segments, for example, there is Patent Document 1 below.

JP 60-78711 A

The above-mentioned Patent Document 1 is an invention relating to a tire vulcanizer having an annular mold made up of a plurality of segments. In this tire vulcanizer, since the thickness of the segment in the radial direction can be reduced, there is an advantage that the outer dimensions of the vulcanizable tire can be increased.
As shown in FIG. 8, a conventional tire vulcanizing mold apparatus 100 having a plurality of segments as shown in Patent Document 1 includes a plurality of segments 31 constituting an annular split mold for molding a tread portion of a tire, and And an outer ring (not shown) arranged radially outward of the plurality of segments 31, and by moving the outer ring downward in the axial direction, the outer ring pushes each segment 31 radially inward. The annular ring mold is moved and each segment 31 is brought into contact with the upper mold 32 and the lower mold 33 and the outer ring is moved upward in the axial direction. In general, the annular divided mold is opened by moving radially outward, and the abutment between each segment and the upper mold 32 and the lower mold 33 is released.
In such a conventional tire vulcanizing mold, it is common to use iron as the material of the upper mold 32 and the lower mold 33 and to use aluminum as the material of the plurality of segments 31. . Therefore, the vulcanization molding of the tire is repeated, the contact between the upper contact surface 31a of the segment 31 and the contact surface 32a of the upper mold 32, and the contact between the lower contact surface 31b of the segment 31 and the lower mold 33. When the contact with the contact surface 33a is repeated, there is a problem that the upper contact surface 31a and the lower contact surface 31b of the segment 31 formed of aluminum are likely to be worn or damaged.

  Therefore, the present invention solves the above-mentioned problems of the prior art, can reduce the number of repairs and extend the life by preventing the wear and damage of the segment, and prevent defective tires as a product due to wear of the segment. It is another object of the present invention to provide a tire vulcanization mold apparatus that can improve the accuracy and stability of an annular mold assembled by closing each segment.

  The tire vulcanizing mold apparatus according to the present invention includes an upper mold for molding a tread portion of a tire, a lower mold, and an annular division that is disposed radially outward of the upper mold and the lower mold. A plurality of segments constituting a mold and an outer ring arranged radially outward of the plurality of segments, and the outer ring is moved in one axial direction so that the outer ring is moved to each segment. Is pressed radially inward to close the annular split mold and bring each segment into contact with the upper mold and the lower mold, and the outer ring is in a direction opposite to the one axial direction. A tire vulcanizing mold configured to move each segment radially outward by moving it to open the annular split mold and to release contact between each segment and the upper mold and the lower mold Mold device, and Instruments, said the upper mold and in contact with abutment surface and the lower mold, and further comprising a reinforcement member as the first feature.

  In addition to the first feature, the tire vulcanization mold apparatus of the present invention has a second feature that a strength reinforcing member is provided on a contact surface of each segment with an adjacent segment.

  In the tire vulcanization mold apparatus according to the present invention, in addition to the first or second feature described above, the strength reinforcing member is formed of a metal member, and the strength of the metal member is determined by the upper mold and the lower mold. The third feature is that the metal member is not less than the strength of the metal material forming the mold, and the metal member is embedded in the contact surface of each segment.

  In the tire vulcanization mold apparatus according to the present invention, in addition to the third feature described above, the metal member is configured such that the outer surface in the contact direction is an uneven surface in which concave portions and convex portions are alternately arranged. This is the fourth feature.

  In addition to the fourth feature described above, the tire vulcanization mold apparatus according to the present invention has a fifth feature that the uneven surface is formed in a threaded shape.

  In addition to any one of the first to fifth features, the tire vulcanizing mold apparatus according to the present invention includes a segment in which the outer surface of each segment and the inner surface of the outer ring facing each segment are opposed to each other. A lateral frustoconical outer surface and an outer ring side frustoconical inner surface; a portion of each segment side frustoconical outer surface and a portion of the outer ring side frustoconical inner surface; Is formed with a segment side guide flat surface and an outer ring side guide flat surface facing each other, and the outer ring pushes each segment radially inward by moving the outer ring downward from above. The annular split mold is closed and each segment is brought into contact with the upper mold and the lower mold, and the lowered outer ring is moved upward to move each segment backward in the radial direction. And open the annular split mold By being configured to release the contact between the segments and the upper and lower molds are characterized in the sixth.

According to the tire vulcanizing mold apparatus according to the first feature, the upper mold for molding the tread portion of the tire, the lower mold, and radially outward of the upper mold and the lower mold A plurality of segments arranged to form an annular split mold, and an outer ring arranged radially outward of the plurality of segments, and moving the outer ring in one axial direction, An outer ring pushes each segment inward in the radial direction to close the annular split mold and causes each segment to abut against the upper mold and the lower mold so that the outer ring moves in the one direction in the axial direction. By moving in the opposite direction, each segment is moved radially outward to open the annular split mold and to release contact between each segment and the upper mold and the lower mold Tire vulcanization mold equipment There are, each segment is in contact with the abutment surface to the upper mold and said lower mold, since it comprises a reinforcement member,
Each segment can be effectively prevented from being worn or damaged. Therefore, it is possible to reduce the number of repairs and extend the service life. In addition, it is possible to prevent a tire from being defective due to wear of the segment.

Further, according to the tire vulcanizing mold apparatus according to the second feature, in addition to the function and effect of the first feature, the strength reinforcing member is provided on the contact surface with the adjacent segment in each segment. ,
Each segment can be more effectively prevented from being worn or damaged.

According to the tire vulcanization mold apparatus according to the third feature, in addition to the function and effect of the first or second feature, the strength reinforcing member is formed of a metal member and the strength of the metal member. However, since the strength is higher than the strength of the metal material forming the upper mold and the lower mold, and the metal member is embedded in the contact surface of each segment,
It is possible to more effectively prevent the segments from being worn or damaged due to contact with the upper mold and the lower mold. Therefore, it is possible to further reduce the number of repairs and extend the service life. Further, the strength reinforcing member can be easily disposed on the contact surface.

Further, according to the tire vulcanization mold apparatus according to the fourth feature, in addition to the function and effect of the third feature, the metal member has an outer surface in the contact direction in which concave portions and convex portions are alternately arranged. Because it is composed of an uneven surface,
When each segment comes into contact with the upper mold, the lower mold, and the adjacent segment, the stress generated on the contact surface of each segment can be effectively dispersed. Therefore, it is possible to more effectively prevent each segment from being worn or damaged.

Further, according to the tire vulcanization mold apparatus according to the fifth feature, in addition to the fourth feature, the concavo-convex surface is constituted by a threaded shape,
When each segment comes into contact with the upper mold, the lower mold, and the adjacent segment, the stress generated on the contact surface of each segment can be more effectively dispersed.

According to the tire vulcanization mold apparatus of the sixth feature, in addition to any one of the first to fifth features, the outer surface of each segment and the inner surface of the outer ring facing the segment are provided. A segment-side frustoconical outer surface and an outer ring-side frustoconical inner surface facing each other, a part of each segment-side frustoconical outer surface and the outer ring-side frustoconical inner surface A segment side guide flat surface and an outer ring side guide flat surface are formed on a part of the side surface so as to oppose each other, and the outer ring moves downward from above to move each segment in the radial direction. By pushing inward to close the annular split mold, each segment is brought into contact with the upper mold and the lower mold, and the lowered outer ring is moved upward to move each segment outward in the radial direction. Move backwards toward the ring Opens the split mold From what has been configured to release the contact between the segments and the upper and lower molds,
Each segment can be pushed by the outer ring by bringing the outer ring-side guide flat surface into contact with the segment-side guide flat surface, so that each segment is stably in surface contact with the outer ring. It is pushed and the posture is not wobbled. Therefore, it is possible to sufficiently reduce the damage and wear of the segment due to unnecessary contact with or contact with the outer ring, and it is possible to reduce the number of repairs and extend the life. Further, it is possible to improve the assembly accuracy of the annular mold assembled by closing each segment (mold assembly) and to improve the stability.

1 is a perspective view schematically showing a tire vulcanization mold apparatus according to an embodiment of the present invention. The horizontal sectional view which shows the relationship between each segment and outer ring which comprise the cyclic | annular division | segmentation metal mold | die of the tire vulcanization mold apparatus which concerns on embodiment of this invention, and shows the initial state before a type | mold assembly is made. , (B) is a horizontal sectional view showing a state after the mold has been assembled. It is a longitudinal cross-sectional view of the principal part of the tire vulcanization mold apparatus concerning the embodiment of the present invention, and is a figure showing the state before a mold set is made. It is a longitudinal cross-sectional view of the principal part of the tire vulcanization mold apparatus concerning the embodiment of the present invention, and is a figure showing the state after a die set was made. It is a longitudinal cross-sectional view of the principal part of the segment in the tire vulcanization mold apparatus which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the principal part of the segment which shows the modification of the strength reinforcement member in the tire vulcanization mold apparatus which concerns on embodiment of this invention. The modification of the segment in the tire vulcanization mold device concerning the embodiment of the present invention is shown, (a) is a horizontal sectional view showing the initial state before making a die set, and (b) after the die set is made. It is a longitudinal cross-sectional view of the principal part of the tire vulcanization mold apparatus which shows this state. It is a longitudinal cross-sectional view of the principal part of the conventional tire vulcanization mold apparatus, and is a figure which shows the state before a die assembly is made.

  The tire vulcanization mold apparatus according to the present invention will be described with reference to the following drawings to provide an understanding of the present invention. However, the following description does not limit the invention described in the claims of the present invention.

First, a tire vulcanization mold apparatus 1 according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, a tire vulcanizing mold apparatus 1 according to an embodiment of the present invention has an upper mold plate 2, a lower mold plate 3, and an outer ring 4 as outer shells, and a tread portion of the tire is provided inside them. An upper mold 5 for molding, a lower mold 6, and a plurality of annularly arranged segments 7 constituting an annular split mold are provided. Vulcanization molding of automobile tires is performed with an upper mold 5 and a lower mold 6 that form the tread portion, and an annular divided mold including a plurality of segments 7.

As shown in FIG. 2, the number of segments 7 is nine, for example, nine in this embodiment, but the plurality of segments 7 are arranged in a ring to form an annular split mold. The annular split mold composed of a plurality of segments 7 has an open state in which the segments 7 are opened in a ring shape as shown in FIG. 2A, and each segment 7 as shown in FIG. It is possible to change to a closed state in close contact with the ring. The mold assembly by the annular split mold is completed in the state of being in close contact with the closed state.
Each segment 7 may further be configured by a plurality of portions.
One outer ring 4 is arranged outside each segment 7. As the outer ring 4 moves, the segments 7 move inward and outward in the radial direction.

Referring also to FIGS. 3 and 4, the outer ring 4 is moved in one axial direction and in the opposite direction via a piston rod 8 of a cylinder (not shown). That is, the outer ring 4 is moved in the vertical direction in FIGS. More specifically, in the apparatus of the present embodiment, when the outer ring 4 is moved from the upper side shown in FIG. 3 to the lower side shown in FIG. 4, each segment 7 is radially inward from the state shown in FIG. 3 to the right). Then, as shown in FIG. 4, each segment 7 comes into contact with the upper mold 5 and the lower mold 6, and the segments 7 are in close contact with each other in a ring shape to complete the mold assembly.
Preparation of the tire vulcanization molding is completed by completing the mold of the annular split mold by each segment 7.
On the other hand, when the outer ring 4 is moved upward from the state shown in FIG. 4 after the vulcanization molding is completed, each segment 7 is moved radially outward (leftward in FIG. 4). As a result, as shown in FIG. 3, each segment 7 is opened, and the mold is released and opened.

  Hereinafter, the configuration and operation of the outer ring 4 and the segment 7 which are main components of the present invention will be described in more detail with reference to FIG.

As shown in FIGS. 2 to 4, in the present embodiment, a strength reinforcing member 20 is arranged on the contact surface of each segment 7 with the upper mold 5 and the lower mold 6. The strength reinforcing member 20 is for preventing wear of the contact surface of each segment 7 due to an impact when contacting the upper mold 5 and the lower mold 6.
Specifically, three strength reinforcing members 20 are arranged in the circumferential direction on the upper contact surface 7a which is the contact surface with the upper mold 5 in each segment 7. In addition, three strength reinforcing members 20 are arranged in the circumferential direction on the lower contact surface 7b which is the contact surface with the lower mold 6 in each segment 7.
In the present embodiment, a plurality of strength reinforcing members 20 having the same shape and the same size are arranged in each segment 7.
The number of strength reinforcing members 20 is not limited to that of the present embodiment, and can be changed as appropriate according to the size of the segment.

Moreover, in this embodiment, as shown in FIGS. 2-5, it is set as the structure which uses the substantially column-shaped elongate metal member as the strength reinforcement member 20. As shown in FIG. Furthermore, the outer surface in the abutting direction (the outer surface of the strength reinforcing member 20 in the radial direction of the segment 7) is constituted by an uneven surface P formed by alternately arranging the concave portions U and the convex portions T. More specifically, the concavo-convex surface P has a threaded shape in which the intersection angle R1 between the two sides forming the recess U and the intersection angle R2 between the two sides forming the projection T are both 90 degrees. is there.
Further, the strength reinforcing member 20 is embedded in the upper contact surface 7a and the lower contact surface 7b. Specifically, the strength reinforcement is applied to the upper contact surface 7a and the lower contact surface 7b so that the contact surface 20a of the strength reinforcing member 20 is flush with the upper contact surface 7a and the lower contact surface 7b. The member 20 is embedded and arranged. Further, the strength reinforcing member 20 is provided on the upper abutting surface 7a and the lower abutting surface 7b so that the longitudinal direction of the strength reinforcing member 20 formed of a substantially cylindrical elongated metal member is the radial direction of each segment 7. It is placed buried.

  In addition, as a metal member which forms the strength reinforcing member 20, the strength of the metal member needs to be higher than the strength of the metal material which forms the upper mold 5 and the lower mold 6. In the present embodiment, the upper mold 5, the lower mold 6, and the strength reinforcing member 20 are all formed of iron, and the segments 7 are formed of aluminum.

  Note that the length E in the longitudinal direction of the strength reinforcing member 20 shown in FIG. 5 is preferably 3 to 5 times the length F in the lateral direction. In addition, the length F in the short direction is desirably 1/2 times to 1/4 times the length H of the upper contact surface 7a. Moreover, the depth (height of a convex part) G of the recessed part which forms the uneven | corrugated surface P of the strength reinforcement member 20 is the depth of the recessed part with which the general purpose screw which has the same length as the length F of a transversal direction ( It is desirable that the length be equal to the height of the convex portion.

  Before the segment 7 is cast, the strength reinforcing member 20 having such a configuration may be preliminarily disposed at a position in contact with the upper mold 5 and the lower mold 6 and embedded in the segment 7. After casting the segment 7, it may be embedded in the segment 7 at a position where it abuts on the upper mold 5 and the lower mold 6. In other words, any manufacturing method may be used as long as the strength reinforcing member 20 can be embedded and disposed in a predetermined position of each segment 7.

In the present embodiment, as shown in FIG. 3, the inner surface of the outer ring 4, that is, the inner surface in the radial direction, which is the surface facing each segment 7, has a frustoconical shape that tapers upward. The inner side surface, that is, the outer ring side frustoconical inner side surface 41 is formed.
A part of the outer ring side truncated conical inner side surface 41 is provided with a belt-like outer ring side guide flat surface 42 extending in the axial direction at a position facing each segment 7. The outer ring side guide flat surface 42 is configured to be inclined with the same gradient as the outer ring side frustoconical inner side surface 41.
Each of the segments 7 has a radially outer surface, which is a surface facing the outer ring 4, formed into a frustoconical outer surface tapering upward, that is, a segment side frustoconical outer surface 71. . The segment side frustoconical outer side surface 71 is configured as a conical curved surface having the same gradient as the outer ring side frustoconical inner side surface 41.
A belt-like segment-side guide flat surface 72 is provided in the axial direction at a central portion in the circumferential direction, which is a part of the segment-side truncated conical outer surface 71. The segment side guide flat surface 72 is inclined with the same gradient as the segment side frustoconical outer surface 71.
The outer ring side guide flat surface 42 and the segment side guide flat surface 72 are in a position facing each other, and when the outer ring 4 is lowered, the outer ring side guide flat surface 42 and the segment side guide flat surface 72 It is set as the structure which carries out surface contact.
The lower plate 3 and the outer ring 4 can be made of a metal such as iron.
Also, as shown in FIGS. 3 and 4, each segment 7 has a smooth movement between the upper mold plate 2 and the lower mold plate 3, so that copper alloy, soft nitriding iron alloy, and other good sliding The plate 9 is interposed in a replaceable manner.

The outer ring side guide flat surface 42 can be configured by using an outer ring side metal plate 43 that is separate from the outer ring 4. In this case, a band-shaped recess 44 is formed in a part of the outer ring-side truncated conical inner side surface 41 in the axial direction, and the outer ring-side metal plate 43 is detachably attached to the recess 44 in a band shape. can do.
The upper surface of the outer ring side metal plate 43 attached to the recess 44 becomes the outer ring side guide flat surface 42.
The outer ring side metal plate 43 can be attached to the recess 44 in a detachable manner using other attachment means such as the screw 10.
The outer ring side metal plate 43 may be made of a copper alloy, a surface-treated iron alloy such as soft nitriding, or other materials suitable for sliding.

Reference numeral 11 denotes a T-shaped block. The T-shaped block 11 is detachably attached to the outer ring 4 so as to penetrate the outer ring-side metal plate 43 by attaching means such as screws 12.
The T-shaped block 11 is configured to be loosely fitted in a T-shaped groove 13 formed on the segment 7 side.
When the T-shaped block 11 and the T-shaped groove 13 are loosely fitted, the outer ring 4 and each segment 7 are connected in a loosely fitted state. The loose coupling between the outer ring 4 and each segment 7 is used when the segment 7 is moved from the closed state to the open state. That is, by moving the outer ring 4 upward, the segments 7 loosely fitted to the outer ring 4 are moved outward in the radial direction, and the mold assembly is released.
3 and 4, reference numeral 14 denotes a stopper, and reference numeral 15 denotes a stopper groove. The upper limit and the lower limit of the movable range of the outer ring 4 are determined by the stopper 14 and the stopper groove 15.

The segment side guide flat surface 72 can also be configured by using a segment side metal plate 73 that is separate from the segment 7 body. In this case, a recess 74 is formed in the cut surface in a state where a part of the segment side frustoconical outer surface 71 is cut, and the segment side metal plate 73 is detachably attached to the recess 74. Can do.
The upper surface of the segment side metal plate 73 attached to the recess 74 becomes the segment side guide flat surface 72.
The segment-side metal plate 73 can be attached to the recess 74 in a detachable manner by using attachment means such as screws (not shown).
Further, the segment side metal plate 73 can be made of a copper alloy, a surface-treated iron alloy such as soft nitriding, or other materials suitable for sliding.

  The T-shaped groove 13 can be formed in a T shape using the recess 74 and a pair of segment side metal plates 73 attached to the recess 74.

Next, operation | movement of the tire vulcanization mold apparatus 1 which concerns on embodiment of this invention is demonstrated using FIG. 3, FIG.
As shown in FIG. 3, when the outer ring 4 is at the uppermost position, each segment 7 constituting the annular split mold is at the outermost side in the radial direction, and the mold assembly is opened most. It is in the state.
In the state where the mold assembly is most opened, the outer ring 4 and each segment 7 are not in contact with each other. That is, the outer ring side frustoconical inner surface 41 and the outer ring side guide flat surface 42 are both separated from the segment side frustoconical outer surface 71 and the segment side guide flat surface 72. The segments 7 are also separated from each other.
Of course, the outer ring 4 and each segment 7 are connected by the T-shaped block 11 and the T-shaped groove 13 in a loosely fitted state.

When the outer ring 4 is lowered downward from the uppermost position (open position of each segment 7) of the outer ring 4 shown in FIG. 3, the ring radius of the outer ring 4 portion facing each segment 7 becomes smaller. Therefore, the outer ring side guide flat surface 42 eventually comes into contact (sliding contact) with the segment side guide flat surface 72.
On the other hand, the outer ring side frustoconical inner side surface 41 maintains a state separated from the segment 7 side, that is, non-contact.
The outer ring side guide flat surface 42 abuts on the segment side guide flat surface 72, whereby the outer ring 4 starts to push the segments 7, and each segment 7 starts moving inward in the radial direction.
Since the pushing of the segment 7 by the outer ring 4 in this case is due to the surface contact between the guide flat surfaces 42 and 72, the posture of the segment 7 during the movement is stable and the peristalsis occurs even if the speed is increased. hard. Therefore, it is possible to sufficiently reduce the damage and wear of the segment 7 due to unnecessary contact with or contact with the outer ring 4, and to reduce the number of repairs and extend the life. Further, it is possible to improve the assembly accuracy of the annular mold assembled by closing each segment 7 and to improve the stability.

  As the outer ring 4 is further lowered, each segment 7 is pushed inward in the radial direction by the outer ring 4 with the outer ring-side guide flat surface 42 in contact with the segment-side guide flat surface 72 for a while. The movement continues.

When the outer ring 4 is lowered to the middle position before reaching the lowest position (closed position of each segment 7) of the outer ring 4 shown in FIG. The ring radius gets smaller.
In this state, the outer ring 4 and each segment 7 are in contact with the outer ring side guide flat surface 42 and the segment side guide flat surface 72, as well as the outer ring side truncated conical inner side surface 41 and the segment side flange. The line contact by the head-conical outer surface 71 is started.

When the outer ring 4 is further lowered, the contact between the outer ring side guide flat surface 42 and the segment side guide flat surface 72 is eliminated, and the both 42 and 72 are separated from each other. That is, the pushing of the segment side guide flat surface 72 by the outer ring side guide flat surface 42 is completed.
Instead, the outer ring-side frustoconical inner surface 41 is pushed by direct line contact with the segment-side frustoconical outer surface 71 to move each segment 7.
This pushing by the line contact between the outer ring side frustoconical inner side surface 41 and the segment side frustoconical outer side surface 71 continues to the closing position of the segment 7.

When the outer ring 4 is lowered to the lowest position shown in FIG. 4, each segment 7 reaches its closed position, and the assembly of the annular split mold is completed.
At the closed position of each segment 7 in which the assembly of the annular split mold is completed, the outer ring side truncated conical inner surface 41 and the segment side truncated conical outer surface 71 are in close contact with each other with the same radius of curvature. Adjacent segments 7 are also in close contact with each other to complete the annular ring. On the other hand, the outer ring side guide flat surface 42 and the segment side guide flat surface 72 are not in contact with each other and are separated from each other with a gap.

In this closed position, as shown in FIG. 4, the upper contact surface 7a of the segment 7 and the contact surface 5a of the upper mold 5 are in contact. Further, the contact surface 20a of the strength reinforcing member 20 disposed on the upper contact surface 7a contacts the contact surface 5a. Furthermore, the lower contact surface 7b of the segment 7 and the contact surface 6a of the lower mold 6 are in contact. In addition, the contact surface 20a of the strength reinforcing member 20 disposed on the lower contact surface 7b contacts the contact surface 6a.
At this time, in the present embodiment, the strength reinforcing member 20 is disposed on the upper contact surface 7 a and the lower contact surface 7 b, so that each segment 7 is brought into contact with the upper mold 5 and the lower mold 6. Can be effectively prevented from being worn or damaged. Therefore, it is possible to reduce the number of repairs and extend the service life.
Further, the strength reinforcing member 20 is configured to be embedded and disposed so as to be flush with the upper contact surface 7a and the lower contact surface 7b, so that the upper contact surface 7a and the lower contact surface 7b contact each other. The strength reinforcing member 20 can be effectively arranged with the area unchanged.
Further, the strength of the metal member constituting the strength reinforcing member 20 is set to the same strength as that of the metal member constituting the upper mold 5 and the lower mold 6, and a plurality of strength reinforcing members are arranged in the circumferential direction of each segment 7. By doing so, it is possible to more effectively prevent each segment 7 from being worn or damaged due to contact with the upper mold 5 and the lower mold 6.

  In addition, the outer surface of the strength reinforcing member 20 in the radial direction of the segment 7 is configured by a concavo-convex surface P having a threaded shape, and the longitudinal direction of the strength reinforcing member 20 formed of a substantially cylindrical elongated metal member is the length of each segment 7. By disposing the strength reinforcing member 20 on the upper contact surface 7a and the lower contact surface 7b so as to be in the radial direction, each segment 7 is brought into contact with the upper mold 5 and the lower mold 6 when each segment 7 is contacted. 7 can be effectively dispersed. That is, the strength reinforcing member 20 can function as a stress relaxation member. Therefore, it can prevent more effectively that each segment 7 is worn out or damaged.

  In a state just before reaching the closing position, it is preferable that the outer ring side truncated conical inner surface 41 and the segment side truncated conical outer surface 71 be pushed by line contact. In the case of the line contact, movement of each segment 7 can be performed, so that the posture can be adjusted during that time. For this reason, each segment 7 can sufficiently correct the mutual positional relationship between each segment 7 and the outer ring 4 and between each segment 7 before the final closing position. An accurate and precise annular division mold assembly with matching can be made.

When each segment 7 in the closed state is opened, the outer ring 4 descending to the lowest position is raised.
Since the T-shaped block 11 on the outer ring 4 side is loosely fitted to the T-shaped groove 13 on the segment 7 side, the T-shaped block 11 is caught in the T-shaped groove 13 by the rising of the outer ring 4. Thus, the segment 7 is dragged radially outward.
The T-shaped block 11 is dimensioned so as not to contact any inner wall of the T-shaped groove 13 while the outer ring 4 is lowered downward.

The shape, size, arrangement position, number of arrangements, and the like of the strength reinforcing member 20 are not limited to those of the present embodiment, and can be changed as appropriate. For example, as shown in FIG. 6A, the strength reinforcing member 200 having an uneven surface Q whose outer surface in the contact direction (the outer surface in the radial direction of the segment 7) is curved in a waveform may be used as the strength reinforcing member. Good. With such a configuration, when each segment 7 comes into contact with the upper mold 5 and the lower mold 6, the stress generated on the contact surface of each segment 7 can be more effectively dispersed. As shown in FIG. 6B, as the strength reinforcing member, the outer surface in the abutting direction (the outer surface in the radial direction of the segment 7) is an unevenness formed by alternately arranging rectangular concave portions and rectangular convex portions. It is good also as a structure using the strength reinforcement member 300 provided with the surface S (what is called a rod shape with a buckle).
In other words, the shape of the concavo-convex surface is such that when each segment 7 comes into contact with the upper mold 5 and the lower mold 6, the stress generated on the contact surface of each segment 7 can be effectively dispersed (resistance to the stress). Shape), any shape may be used.

Further, as shown in FIG. 7, in each segment 7, the strength reinforcing member 20 may be arranged on the adjacent contact surface 7 c that contacts the adjacent segment 7. By adopting such a configuration, it is possible to reduce the number of repairs and prolong the service life by preventing wear and damage of the adjacent abutment surface 7c, and to prevent a defective tire as a product due to wear of the segment 7. be able to. Further, it is possible to improve the assembly accuracy of the annular mold assembled by closing each segment (mold assembly) and to improve the stability. In addition, when arrange | positioning the strength reinforcement member 20 to the adjacent contact surface 7c, it is necessary to arrange | position the strength reinforcement member 20 of the same shape and magnitude | size in the same position between the adjacent segments 7. FIG.
In this modification, the strength reinforcing member 20 that is exactly the same as the strength reinforcing member 20 disposed on the upper contact surface 7a and the lower contact surface 7b of the segment 7 is disposed on the adjacent contact surface 7c. Of course, the configuration is not limited to such a configuration, and a configuration in which a strength reinforcing member having a shape and a material different from those of the strength reinforcing members disposed on the upper contact surface 7a and the lower contact surface 7b is disposed on the adjacent contact surface 7c. Also good.

  The tire vulcanization mold apparatus of the present invention is useful in the field of manufacturing automobile tires, and has great industrial applicability.

DESCRIPTION OF SYMBOLS 1 Tire vulcanization mold apparatus 2 Upper mold plate 3 Lower mold plate 4 External ring 5 Upper mold 5a Contact surface 6 Lower mold 6a Contact surface 7 Segment 7a Upper contact surface 7b Lower contact surface 7c Adjacent contact Surface 8 Piston rod 9 Good sliding plate 10 Screw 11 T-shaped block 12 Screw 13 T-shaped groove 14 Stopper 15 Stopper groove 20 Strength reinforcement member 20a Contact surface 31 Segment 31a Upper contact surface 31b Lower contact surface 32 Upper metal Die 32a Contact surface 33 Lower mold 33a Contact surface 34 Upper plate 35 Lower plate 41 Outer ring side truncated conical inner surface 42 Outer ring side guide flat surface 43 Outer ring side metal plate 44 Recess 71 Segment side dock Conical outer surface 72 Segment side guide flat surface 73 Segment side metal plate 74 Recess 100 Tire Vulcanization mold apparatus 200 Strength reinforcing member 300 Strength reinforcing member E Length F Length G Length P Uneven surface Q Uneven surface R1 Angle R2 Angle S Uneven surface T Convex U Concave

Claims (6)

  An upper mold for molding a tread portion of a tire, a lower mold, a plurality of segments that are arranged radially outward of the upper mold and the lower mold to form an annular split mold, and An outer ring arranged radially outward of the plurality of segments, and the outer ring is moved in one axial direction so that the outer ring pushes each segment radially inward to form an annular shape. Close the split mold and bring each segment into contact with the upper mold and the lower mold, and move the outer ring in a direction opposite to the one direction in the axial direction to move each segment outward in the radial direction. It is a tire vulcanization mold apparatus constituted so that it may move to the direction and open the annular divided mold and release the contact between each segment and the upper mold and the lower mold. The upper mold and the Abuts the abutment surface in the part mold, the tire vulcanizing mold apparatus, characterized in that it comprises a reinforcement member.   The tire vulcanization mold apparatus according to claim 1, wherein a strength reinforcing member is provided on a contact surface of each segment with an adjacent segment.   The strength reinforcing member is formed of a metal member, and the strength of the metal member is not less than the strength of the metal material forming the upper mold and the lower mold, and the abutting surface of each segment is The tire vulcanization mold apparatus according to claim 1 or 2, wherein a metal member is embedded and disposed.   The tire vulcanization mold apparatus according to claim 3, wherein the metal member has an outer surface in an abutting direction formed by an uneven surface formed by alternately arranging concave portions and convex portions.   The tire vulcanization mold apparatus according to claim 4, wherein the uneven surface has a threaded shape.   The outer side surface of each segment and the inner side surface of the outer ring facing it are configured as a segment side frustoconical outer surface and an outer ring side frustoconical inner surface facing each other. A part of the conical outer surface and a part of the outer ring side truncated conical inner surface constitute a segment side guide flat surface and an outer ring side guide flat surface facing each other, and the upper part of the outer ring When the outer ring is moved downward from the outer ring, the outer ring pushes each segment radially inward to close the annular split mold and brings the segments into contact with the upper mold and the lower mold. By moving the outer ring upward, each segment is moved backward in the radial direction to open the annular split mold and release the contact between each segment and the upper and lower molds. Specially Tire vulcanizing mold according to any one of claims 1 to 5.

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