TWI619592B - A tire vulcanizing apparatus - Google Patents

Abstract

The tire vulcanizing apparatus of the present invention comprises: a rim ring (5, 6) supporting a raw tire (30X), and a tread supported from the inner side of the rim ring (5, 6) and the raw tire (30X) A heater (23) that heats a green tire (30X) by radiating heat with a different amount of radiated heat in the width direction.

Description

Tire vulcanizing device

The present invention relates to a tire vulcanizing apparatus.

Conventionally, a green tire formed by a molding machine is vulcanized by a vulcanization apparatus. For example, Patent Document 1 discloses a center mechanism that heats a thick portion of a green tire in a focused manner and has a heat generating means that is mounted to be movable inside the green tire.

[Prior patent documents] [Patent Document]

[Patent Document 1] Japanese Patent No. 4387047

However, the technique disclosed in Patent Document 1 is provided with a movable heating means for locally heating the inner surface of the green tire, so that heating unevenness may occur in the green tire.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tire vulcanizing apparatus which generates uneven heating of a green tire.

A tire vulcanizing apparatus according to the present invention includes: a rim ring that supports a raw tire, and a radiation heat that is different from a tread width direction of the raw tire from an inner side of the raw tire supported by the rim ring. The heating unit that heats the raw tire described above by radiant heat.

In the above-described tire vulcanizing apparatus, the raw tire is heated by the radiant heat of the radiated heat different from the tread width direction of the raw tire, so that the rubber type, thickness or shape can be continuously imparted in the tread width direction of the green tire. The most appropriate amount of heat for raw tires.

The heating portion may have a radiating surface that emits the radiated heat in a direction corresponding to a position along the tread width direction.

At this time, since the radiation direction of the radiant heat is defined as the tread width direction of the green tire according to the orientation of the radiation surface, the green tire can be stably supplied with the most appropriate heat according to the rubber type, thickness, or shape.

The radiating surface may be formed by a curved surface continuous with the tread width direction.

At this time, since the radiation direction of the radiant heat is defined by the curved surface continuous with the tread width direction, the raw tire can be continuously changed in heat in the tread width direction of the green tire.

The curved surface may also be convex toward the radially inner side of the green tire.

At this time, a large amount of heat can be imparted to the tread and the side wall of the green tire.

The curved surface may also be convex toward the radially outer side of the green tire.

At this time, uniform heat can be imparted to the tread and the side wall of the green tire.

The heating unit may have a plurality of radiators that are arranged in the tread width direction and independently control the radiation heats to be different from each other.

In this case, since the amount of radiant heat from the plurality of radiators can be changed, it is possible to impart uniform heat to a plurality of types of green tires having different rubber types, thicknesses, or shapes.

According to the present invention, it is possible to provide a tire vulcanizing apparatus which is less uneven in heating of a green tire.

1‧‧‧ tire vulcanizer

2‧‧‧ tire mold

3‧‧‧Upper side mode

4‧‧‧Bottom mode

5‧‧‧Upper ring

6‧‧‧Lower ring

7‧‧‧Tread mold

8‧‧‧ tread section

9‧‧‧Sliding section

10‧‧‧Airbag

11‧‧‧ Main body

12‧‧‧Upper gripping section

13‧‧‧ lower clamping section

14‧‧‧Central institutions

15‧‧‧Airbag clip ring

16‧‧‧ center column

17‧‧·Mold fixing mechanism

18‧‧‧Mould lifting mechanism

20‧‧‧ tire heating mechanism

21‧‧‧External heating mechanism

22‧‧‧Internal heating mechanism

22B‧‧‧Internal heating mechanism

23, 23A, 23B‧‧‧ heater

23B1‧‧‧First heater

23B2‧‧‧second heater

23B3‧‧‧ Third heater

23B4‧‧‧fourth heater

23B5‧‧‧ fifth heater

24, 24A, 24B‧‧‧ radiation surface

24B1‧‧‧first radiation surface

24B2‧‧‧second radiation surface

24B3‧‧‧ third radiation surface

24B4‧‧‧Fourth Radiation

24B5‧‧‧ fifth radiation surface

25‧‧‧ wiring

30‧‧‧ tires

30X‧‧‧Life tires

31‧‧‧ tread

32‧‧‧ side wall

33‧‧‧ rims

Fig. 1 is a partial cross-sectional view showing a tire vulcanizer according to a first embodiment of the present invention.

Fig. 2 is a partial cross-sectional view showing the tire vulcanizer of the same embodiment.

Fig. 3 is a partial cross-sectional view showing a tire vulcanizer according to a second embodiment of the present invention.

Fig. 4 is a view showing the penetration of the heater of the tire vulcanizing apparatus of the same embodiment. view.

(First embodiment)

The first embodiment of the present invention will be described. Fig. 1 is a partial cross-sectional view showing the tire vulcanizer of the embodiment.

The tire vulcanizer 1 of the present embodiment shown in Fig. 1 includes a tire mold 2, an airbag 10, a center mechanism 14, a mold fixing mechanism 17, a mold elevating mechanism 18, and a tire heating mechanism 20.

The tire mold 2 has an upper mold 3, a lower mold 4, an upper rim ring 5, a lower rim ring 6, and a tread mold 7.

The upper mold 3 and the lower mold 4 are molds for molding the side walls 32 of the tire 30. The upper side mold 3 is attached to the mold lifting mechanism 18. The lower side mold 4 is attached to the mold fixing mechanism 17.

The upper rim ring 5 and the lower rim ring 6 are molds for forming the two rims 33 of the tire 30.

The tread mold 7 has a tread segment 8 and a sliding segment 9.

The tread segment 8 is a mold that transfers the tread pattern to the tread portion 31 of the green tire 30X.

The sliding section 9 holds the tread section 8 so that the tread section 8 can move in the radial direction of the tire 30. The slide section 9 is coupled to the die lift mechanism 18.

Further, the configuration of the tire mold 2 is not limited to the above configuration. For example, the configuration of the tire mold 2 can be appropriately selected in accordance with the shape of the tire to be produced and the like.

The airbag 10 is from the inside when the tire vulcanizer 1 is used The green tire 30X disposed in the tire mold 2 is pressed against the hollow member for the tire mold 2. The airbag 10 has a main body portion 11 corresponding to the shape of the inner surface of the tire 30 which is vulcanized by the tire vulcanizing apparatus 1 of the present embodiment, and an upper holding portion 12 and a lower holding portion 13 which are coupled to the center mechanism 14. The inside of the airbag 10 is filled with a gas such as high-temperature steam, whereby the airbag 10 is pressed against the green tire 30X from the inner surface, and the heat of the high-temperature vapor is transmitted to the inner surface of the green tire 30X through the airbag 10.

Further, the configuration of the airbag 10 is not limited to the above configuration.

The center mechanism 14 is provided with an upper holding portion of the airbag 10 12 and a pair of airbag collars 15 connected to the lower clamping portion 13 and a center post 16 coupled to the pair of airbag collars 15. The center mechanism 14 is such that the pair of airbag collars 15 are relatively moved in the direction of the center line 16a of the center post 16, whereby the airbag 10 is deformed to insert the airbag 10 into the detached green tire 30X.

Further, the configuration of the center mechanism 14 is not limited to the above configuration.

The mold fixing mechanism 17 can appropriately select the support center mechanism 14 And a conventional configuration of the lower mold 4.

The mold lifting mechanism 18 is such that the upper mold 3 and the tread mold 7 are opposite. The lower mold 4 moves forward and backward toward the center line 16a of the center pillar 16. Further, in the present embodiment, the mold elevating mechanism 18 moves the sliding section 9 of the tread mold 7 toward the center pillar 16 side in accordance with the approach of the tread mold 7 toward the mold fixing mechanism 17.

Further, the configuration of the mold elevating mechanism 18 is not limited to the above configuration.

The tire heating mechanism 20 has a top side mold 3 and a lower side. The mold 4 and the tread mold 7 have an external heating mechanism 21 that heats the green tire 30X from the outer surface 30a side of the green tire 30X, and an internal heating mechanism that is attached to the center pillar 16 to heat the green tire 30X from the inner surface 30b side of the green tire 30X. twenty two.

The external heating mechanism 21 is, for example, a flow having a high temperature vapor Road, the raw tire 30X is heated from the outside by the heat of high temperature steam. Further, the configuration of the external heating mechanism 21 is not limited to the above configuration.

The internal heating mechanism 22 has: mounted on the center pillar 16 A heater (heating portion) and a wiring 25 for supplying electric power to the heater 23.

The heater 23 is from the support of the upper and lower rim rings 5, 6 On the inner side of the tire 30X, the tread width direction A1 of the raw tire 30X is heated by the radiant heat by the radiant heat with different amounts of radiant heat. In the present embodiment, the heater 23 is heated by the airbag 10 to lift the tire 30X. Further, in the case of the tire vulcanizing apparatus 1 not including the airbag 10, the heater 23 may directly heat the green tire 30X from the inner side of the green tire 30X.

The inner surface 30b of the raw tire 30X is formed in the heater 23 A radiating surface 24 that emits radiant heat. The heat generated by the heater 23 is mainly radiated toward the normal direction of the radiation surface 24. In the present embodiment, the radiation surface 24 of the heater 23 can be configured in accordance with the type, thickness or shape of the rubber of the tire 30.

For example, the radiating surface 24 of the heater 23 is a region that is heated to a relatively large extent in order to uniformly heat the entire green tire 30X. As an example, the radiating surface 24 of the heater 23 has a surface 24a facing a thick portion of the rubber, so that the portion of the raw tire 30X having a thick rubber thickness can transmit more radiant heat than the portion having a thinner thickness of the rubber.

Further, the configuration of the radiation surface 24 is not limited to the above. In another example of the configuration of the radiation surface 24, when the radiation surface 24 of the heater 23 differs in the rubber type corresponding portion of the green tire 30X, the surface of the portion of the rubber type having a high vulcanization temperature is provided so as to be vulcanized. A part of the rubber type having a high temperature can transmit more radiant heat than a part of a rubber type having a lower vulcanization temperature.

Further, as another example, the radiation surface 24 of the heater 23 has a surface defined by the distance between the heater 23 and the inner surface 30b of the green tire 30X corresponding to the size of the green tire 30X so that the alignment is at a position away from the heater 23. The portion can convey more radiant heat than the portion located near the heater 23.

The shape of the heater 23 is not particularly limited as long as it has the above-described radiation surface 24. As an example of the shape of the heater 23, for example, the heater 23 has a substantially bar shape in the tread width direction A1 of the green tire 30X in a state in which the green tire 30X is disposed in the tire mold 2. Specifically, the heater 23 is formed in a shape of a rotating body centering on a straight line extending in the tread width direction A1 (the center line 16a of the center pillar 16 in the present embodiment). Further, the intermediate portion 23a in the direction of the center line 16a of the center post 16 of the heater 23 has a small diameter, and in the direction of the center line 16a of the center post 16, it is close to the end 23b of the upper rim ring 5 and the end close to the lower rim ring 6. 23c is larger than the intermediate portion 23a. Further, from the intermediate portion 23a of the heater 23 toward both ends 23b and 23c, the diameter of the heater 23 is gradually larger. The radiating surface 24 of the heater 23 in the above example is constituted by the outer peripheral surface of the rotating body centering on the center line 16a of the center pillar 16. Heater 23 The radial surface 24 is a curved surface that is convex in the radial direction of the raw tire 30X in the state in which the green tire 30X is disposed in the tire mold 2 (that is, the center line 16a side of the center pillar 16 in the present embodiment). The intermediate portion of the peripheral surface is constituted by a curved surface that forms a concave shape across the entire circumference toward the center line direction.

The heater 23 can employ a conventional heat generation method that appropriately selects and receives heat from the supply of electric power. That is, the heater 23 of the present embodiment may be an infrared heater, a ceramic heater, a graphite heater or the like. The wavelength of the radiant heat from the heater 23 is the absorption wavelength characteristic of the airbag 10, and the wavelength at which the airbag 10 is heated can be effectively performed.

The wiring 25 is disposed inside the center pillar 16, and connects the heater 23 to a power source (not shown).

The operation of the tire vulcanizer 1 of the present embodiment will be described.

In the use of the tire vulcanizing apparatus 1 of the present embodiment, as shown in Fig. 1, the green tire 30X and the heater 23 are placed inside the green tire 30X, and the green tire 30X is placed on the lower mold 4. Further, the tread mold 7 and the upper mold 3 are attached to cover the outer surface 30a of the green tire 30X.

After the tire mold 2 is in the fully closed state, the external heating mechanism 21 heats the green tire 30X from the outer surface 30a of the green tire 30X through the upper mold 3, the lower mold 4, and the tread mold 7. Then, the gas such as warm steam is supplied into the airbag 10, and the outer surface 30a of the green tire 30X is pushed toward the inner surface of the tire mold 2 by the airbag 10. The raw tire 30X is added from the inner surface 30b of the green tire 30X by heat such as high-temperature steam inside the airbag 10. heat.

In addition, in the present embodiment, the addition of the internal heating mechanism 22 is added. The heat source 23 supplies electric power, and the raw tire 30X is further heated from the inner surface 30b of the green tire 30X through the airbag 10 by the radiant heat radiated from the radiation surface 24 of the heater 23.

The high temperature vapor or the like filled in the inside of the airbag 10 is in the airbag 10 The inner flow heats the inner surface of the airbag 10 substantially uniformly. In this regard, the heater 23 can communicate the radiant heat toward a predetermined direction defined by the radiating surface 24 of the heater 23. By heating the green tire 30X such as high-temperature steam and heating the raw tire 30X by the heater 23, the entire raw tire 23X can be uniformly heated to heat the region where the required heating is large.

By means of high temperature steam, etc. with heater 23 and external heating mechanism 21. The raw tire 30X is vulcanized and formed in the tire mold 2.

As described above, the tire vulcanization according to the present embodiment In the apparatus 1, the heater 23 of the internal heating mechanism 22 continuously heats the inner surface 30b of the green tire 30X in the tread width direction A1, and the tire 30 can be vulcanized and molded in a state where the heating unevenness of the green tire 30X is small.

Further, in the present embodiment, since the radiation surface 24 of the heater 23 is a curved surface, the rubber type, thickness, or shape of the green tire 30X can be matched in the tread width direction A1 of the green tire 30X and the surrounding direction of the green tire 30X. The inner surface 30b of the tire 30X continuously transmits radiant heat.

Moreover, the addition of the tire vulcanizing apparatus 1 of the present embodiment The heater 23 is such that the diameter of the heater 23 is gradually increased from the intermediate portion toward the both ends in the center line direction, so that the radiating surface 24 of the heater 23 can be opposite to the raw wheel. The tread portion 31 of the tire 30X imparts more heat to the side wall 32 of the raw tire 30X.

(Modification)

Next, a modification of the above embodiment will be described. Fig. 2 is a partial cross-sectional view showing the tire vulcanizing apparatus of the present modification.

As shown in Fig. 2, in the present modification, the heater 23 (see Fig. 1) described above is provided with a heater 23A having a different shape instead of the above-described heater 23.

The heater 23A of the present modification is provided in the tire mold 2 In the state in which the green tire 30X is placed, a substantially spindle shape in which the tread width direction A1 of the green tire 30X is long is formed. Specifically, the heater 23A is formed in a spindle shape centering on the center line 16a of the center pillar 16. That is, the heater 23A has a large diameter in the intermediate portion 23aA in the direction of the center line 16a of the center post 16, and in the direction of the center line 16a of the center post 16, approaches the end 23bA of the upper rim ring 5 and the lower rim ring 6 The end 23cA is smaller than the intermediate portion 23aA. Further, from the intermediate portion 23aA of the heater 23A toward the both ends 23bA, 23cA, the straightness of the heater 23A is sequentially small. The radiating surface 24A of the heater 23A in the present modification is constituted by a peripheral surface of a heater 23A formed in a spindle shape of the center post 16a. The radiating surface 24A of the heater 23A is constituted by a curved surface of a ridge shape that spans the entire circumference in a direction opposite to the center line from the intermediate portion forming the peripheral surface of the cylinder so as to be oriented in a state in which the green tire 30X is disposed in the tire mold 2 The radially outer side of the green tire 30X is convex.

The heater 23A of the present modification can be used for two of the raw tires 30X. The inner surfaces of the side wall 32 and the tread portion 31 are radiated by the radiant heat substantially uniformly.

(Second embodiment)

The second embodiment of the present invention will be described. Fig. 3 is a partial cross-sectional view showing a tire vulcanizer according to a second embodiment of the present invention. Fig. 4 is a perspective view showing a heater of the tire vulcanizing apparatus of the embodiment.

In the tire vulcanizer 1 of the present embodiment, the internal heating mechanism 22B having a different configuration from the internal heating mechanism 22 according to the first embodiment described above is provided instead of the internal heating mechanism 22 described in the first embodiment.

The internal heating mechanism 22B is as shown in Fig. 4, and has a complex The number of heaters (radiators) 23B (the first heater 23B1, the second heater 23B2, the third heater 23B3, the fourth heater 23B4, and the fifth heater 23B5 in the present embodiment) and the plurality of heaters 23B A control unit (not shown) that controls the heat state.

The plurality of heaters 23B are independent of each other for heat generation control. plural As shown in FIG. 3, the heater 23B is arranged in the tread width direction A1 in a state in which the green tire 30X is disposed in the tire mold 2. In the present embodiment, the plurality of heaters 23B are arranged coaxially with the center line 16a of the center pillar 16. Each of the plurality of heaters 23B has a radiation surface 24B formed by an outer surface of a cylinder centered on the center line 16a of the center pillar 16 (first radiation surface 24B1, second radiation surface 24B2, third radiation surface 24B3, fourth emission) Face 24B4 and fifth radiating surface 24B5).

In this embodiment, the first control unit controls the first The heat generation state of the heater 23B1, the second heater 23B2, the third heater 23B3, the fourth heater 23B4, and the fifth heater 23B5 is realized by the heater 23 described in the first embodiment and the modifications. The heater 23A has the same effect. Further, in the present embodiment, it is possible to easily set an appropriate amount of radiated heat to the tire 30 which is asymmetrically formed in the tread width direction A1 of the tire 30.

[Industrial Availability]

The present invention is applicable to a device for vulcanization forming of a tire.

Claims (4)

A tire vulcanizing device comprising: a rim ring supporting a raw tire, a center post disposed at a center of the wheel ring, and an inner side of the raw tire supported from the rim ring to form a tread of the raw tire The heating unit that heats the raw tire by the radiant heat in the radiation heat of different width directions, the heating unit is a heater that is attached to the center column, and emits radiant heat from the surface provided on the outer side of the heater. In the surface, the radiation surface is formed in a shape of a rotating body centered on the center pillar, and the radiating surface is oriented in a different direction in a direction along the tread width direction, and the radiating surface is continuous in the tread width direction. The surface is composed of. The tire vulcanizing apparatus according to claim 1, wherein the curved surface is convex toward the radially inner side of the green tire. The tire vulcanizing apparatus according to claim 1, wherein the curved surface is convex toward the outer side in the radial direction of the green tire. The tire vulcanizing apparatus according to claim 1, wherein the heating unit has a plurality of radiators that are arranged in the tread width direction and can independently control the radiation heats to be different from each other.