JP3404106B2 - Tire vulcanizer and tire vulcanizing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire vulcanizer and a tire vulcanizing method.

[0002]

2. Description of the Related Art Generally, in a tire vulcanizer, a tire is mounted in a pair of split molds, a bladder is advanced into the inner cavity of the tire with both molds sealed, and steam is introduced into the bladder. By supplying a heat and pressure medium such as
The bladder is brought into close contact with the entire inner surface of the tire, and the tire is vulcanized through the bladder.

By the way, in a conventional tire vulcanizer, a pair of split molds is composed of an upper mold and a lower mold which are divided into upper and lower parts, and the upper mold is movable up and down with respect to the lower mold. It is provided. Then, in a state in which the upper mold is lifted and separated from the lower mold, the tire is lifted and lowered in a horizontal state by the lifting mechanism so that the tire is mounted on or taken out from the lower mold. That is, the conventional tire vulcanizer is generally a so-called vertical type in which the tire is attached to and detached from the split mold in the vertical direction.

[0004]

However, in the conventional vertical vulcanizer, since the upper die and the tire are vertically moved up and down, the vulcanizer becomes expensive as a whole, and the tire is handled. Etc., the operability becomes poor. Therefore, when installing this vertical vulcanizer in a factory, etc., by digging a hole in the floor of the factory and installing the lower half of the vulcanizer in the hole,
The current situation is to reduce the installation height of the vulcanizer. Therefore, in such a vertical vulcanizer, there is a problem that the labor and cost required for its installation increase and the equipment cost increases.

In order to solve such a problem, a pair of split molds is composed of a left mold and a right mold which are divided into left and right parts, and tires are mounted on both molds in an upright state. A so-called horizontal vulcanizer has been proposed.
Further, in this horizontal vulcanizer, one of the molds and the tire is moved laterally, so that the vulcanizer can be made low as a whole, and the labor and cost required for its installation are reduced. Therefore, the equipment cost can be suppressed to 1/4 to 1/5 as compared with the vertical vulcanizer described above.

However, in this horizontal vulcanizer, the tires are mounted in an upright state, and therefore, as compared with the vertical vulcanizer in which the tires are mounted horizontally, the thermal pressure of steam or the like in the bladder is increased. When the medium is supplied, a large temperature difference is likely to occur between the upper side and the lower side in the bladder. For this reason, a difference in heating temperature by the heat and pressure medium occurs between the upper side and the lower side of the tire, and the entire tire is not heated uniformly. As a result, the tire cannot be vulcanized uniformly over the entire tire, which causes a problem that the quality of the tire deteriorates. Further, in order to perform sufficient vulcanization even in the tire portion where the heating temperature is low, it is necessary to set the vulcanization time with reference to the portion where the heating temperature is low. For this reason, the time required for vulcanization becomes long, and it becomes impossible to efficiently vulcanize the tire, and as the operating time of the vulcanizer increases, the electric power for operating the vulcanizer and There is also a problem that the consumption of energy such as fuel increases.

Further, during tire vulcanization, steam supplied into the bladder is drained and accumulated in the bladder due to a temperature difference between the inside and outside of the bladder.
It is a serious problem in tire vulcanization. That is, when the drain collects in the bladder, the heating temperature of the tire becomes lower in the area where the drain collects than in other areas, and the entire tire is not heated uniformly. Therefore, due to the presence of this drain, there are problems such that the tire as a whole cannot be uniformly vulcanized, or the vulcanization cannot be performed efficiently. in this case,
In a vertical vulcanizer where the tires are mounted horizontally,
Since the drain is dispersed and accumulated over a wide range of the lower sidewall portion of the tire, the presence of the drain has a small adverse effect on tire vulcanization. However, in a horizontal vulcanizer in which the tire is installed in an upright state, the drain is concentrated in a narrow area of the lower tread portion of the tire, so that the presence of the drain has a great adverse effect on the tire vulcanization. The problem that it becomes a thing arises.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a tire vulcanizer capable of suppressing equipment costs and uniformly heating the entire tire. It is to provide a tire vulcanizing method.

[0009]

In order to achieve the above object, in the invention as set forth in claim 1, a tire which is vulcanized by supplying a heat and pressure medium to the inside of a tire mounted in a mold. In the vulcanizer, the circumference of the tire is arranged inside the tire.
And a peripheral portion of the rotating body that is provided so as to be rotatable in any direction.
Is installed in a state that it is obliquely inclined with respect to the radial direction of the rotating body.
And a hot press medium from the jet port.
Of the heat and pressure medium from the jet outlet.
A rotating body is provided rotatably in the circumferential direction of the tire by the rotational force of the jetting, and a jetting port for jetting the heat and pressure medium toward the inside of the tire is provided on the outer peripheral portion of the rotating body while rotating the rotating body. The heat and pressure medium is ejected from the ejection port and supplied to the inside of the tire.
Further, in the invention according to claim 2, the jet outlet is a nozzle.
And configured to be injected into the bead portion of the tire.
It was the one. The invention according to claim 3 is the rotating body.
Are a pair of discs that rotate in the same or opposite directions
It is composed of The invention according to claim 4
Then, further inside the tire from the axial direction of the rotating body
The center post to be inserted and the solid
The fixed member and the fixed member provided inside the tire.
The drain suction pipe for sucking the drain is provided and
A pair of rotating bodies are arranged on both sides of the fixing member in the axial direction.
It is a thing.

According to a fifth aspect of the invention, it is mounted in a mold.
Vulcanization by supplying a hot-pressurized medium to the inside of the tire
In the ear vulcanization method, inside the tire from the axial direction
Injecting a hot-pressurized medium from a pair of inserted rotating bodies
While rotating the rotating body in the circumferential direction of the tire,
While supplying heat and pressure medium to the inside of the ear,
Drain should be sucked in from the bottom of the part and discharged to the outside.
It is a tire vulcanizing method characterized by the above.

[0011]

Therefore, according to the present invention, when the tire is vulcanized,
While the rotating body is rotated, the heat and pressure medium is ejected from the ejection port provided on the outer peripheral portion thereof, and the heat and pressure medium is supplied to the inside of the tire. Therefore, the heat and pressure medium supplied to the inside of the tire is agitated and the temperature is made uniform. Therefore, as the vulcanizer, even if a horizontal vulcanizer in which the tire is installed in an upright state is adopted, it is necessary to supply a hot-pressurized medium, and there is no temperature difference between the upper side and the lower side inside the tire, The entire tire can be uniformly heated by the hot press medium.

Further, if the drain generated inside the tire is discharged to the outside through the drain discharge passage during the supply of the hot press medium, the entire heating of the tire can be more surely performed. Therefore, even if a horizontal vulcanizer in which drain is concentrated in a narrow range of the lower tread portion of the tire is adopted as the vulcanizer, the adverse effect of the drain can be reliably eliminated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a horizontal vulcanizer will be described below with reference to the drawings.

As shown in FIG. 1, a holding cylinder 1 having a cylindrical shape.
Is supported by the main body frame 2, and a right bead ring 3 is integrally formed at one end opening edge portion thereof. A right mold 4 is supported on the bead ring 3 with its inner peripheral edge portion. The left die 5 is laterally movably supported by the main body frame 2 via a moving mechanism (not shown), and is movable toward and away from the right die 4. The left bead ring 6 is arranged corresponding to the inner peripheral edge portion of the left mold 5 and is movable integrally with the left mold 5.

The bottomed cylindrical bladder clamp cylinder 7 is arranged on the inner peripheral side of the holding cylinder 1, and one end of the bladder 8 is clamped and fixed between the one end opening edge portion and the one end opening edge portion of the holding cylinder 1. Has been done. The center post 9 is fitted into the bladder clamp cylinder 7 so as to be movable along the axial direction of the molds 4 and 5, and is reciprocated by a cylinder (not shown). A bladder holding portion 10 is formed at the tip of the center post 9, and the other end of the bladder 8 is attached to the holding portion 10.

Then, with the left mold 5 separated from the right mold 4, the tire T is laterally moved in an upright state by a transport mechanism (not shown) to be mounted in the right mold 4, and thereafter,
The left mold 5 is brought close to the right mold 4 to seal both molds 4 and 5. As a result, the tire T is mounted in the molds 4 and 5 in an upright state. In this state, when the center post 9 is moved to the left in FIG. 1, the bladder 8 enters the inner cavity of the tire T and is brought into close contact with the entire inner surface of the tire T, as shown in the figure.

As shown in FIGS. 1 and 2, a disc-shaped flange 11 is integrally formed at the tip of the center post 9. The drain discharge hole 12 is formed in the center post 9, and one end of the drain discharge hole 12 extends vertically downward at a position corresponding to the flange 11 and is opened in the lower outer peripheral surface of the flange 11. The other end of the drain discharge hole 12 is
The valve V extends to the base end side of the center post 9.
It is open to the outside via. A drain suction pipe 13 is attached to the opening of the drain discharge hole 12 on the flange 11 side, the suction pipe 13 extends vertically downward, and the lower end thereof is the inner surface of the lower tread portion of the tire T in the mounted state. It is located in the vicinity. The drain suction pipe 13 is
It is made of a highly flexible material such as rubber or synthetic resin. In this embodiment, the drain discharge hole 12 and the drain suction pipe 13 form a drain discharge path.

A pair of rotating discs 14 as rotating bodies are rotatably supported by the center post 9 on both sides of the flange 11 via a ring-shaped bearing metal 15. The steam supply hole 16 is formed in the center post 9, and vertically extends upward in a state where one end of the steam supply hole 16 is branched into two, and is opened in an upper outer peripheral surface of the center post 9 at a position corresponding to each bearing metal 15. Has been done. The other end of the steam supply hole 16 extends to the base end side of the center post 9 and is connected to a steam supply unit (not shown).

The bearing metal 15 has a substantially U-shaped cross section, and a groove 15a extending in the circumferential direction is formed on the inner peripheral side thereof. Further, the bearing metal 15 has a groove 1 and an outer peripheral surface side thereof.
A plurality of communication holes 15b are formed to communicate with the inner bottom surface side of 5a. Furthermore, on the inner peripheral side of the rotating disk 14,
A groove 14a extending in the circumferential direction is formed, and the groove 14a is formed.
Is communicated with the communication hole 15b of the bearing metal 15. The ejection holes 17 as ejection ports are formed so that the outer peripheral surface side of the rotary disc 14 and the inner bottom surface side of the concave groove 14a communicate with each other, and a plurality of ejection holes 17 are provided at equal intervals along the circumferential direction of the rotary disc 14. ing. The ejection holes 17 are formed in the rotating disc 1
4 are formed so as to be inclined at a predetermined angle with respect to the radial direction.

Next, the operation of the horizontal vulcanizer constructed as described above will be described. When vulcanizing the tire T, first, the tire T is mounted in an upright state in the molds 4 and 5 to seal the molds 4 and 5. In this state, the center post 9 is moved to the left in FIG. 1, and the bladder 8 enters the inner cavity of the tire T as shown in the figure, and is brought into close contact with the entire inner surface of the tire T. At this time, the rotating disk 14 at the tip of the center post 9 is arranged at a position corresponding to the inner peripheral surface of the tire T.

Next, a steam as a heat and pressure medium is sent from a steam supply unit (not shown) to the steam supply hole 16 of the center post 9. Then, the steam passes through the steam supply hole 16 and fills the concave groove 14a of each rotary disk 14 through the concave groove 15a of each bearing metal 15 and the communication hole 15b. Then, the steam is ejected from the ejection holes 17 of each rotary disk 14 and supplied into the bladder 8.

At this time, since the ejection holes 17 are provided in a state of being inclined with respect to the radial direction of the rotating disk 14,
As the steam spouts from the spout hole 17, the rotating disk 1
A rotational force in the direction of the arrow in FIG. 2 is applied to 4. That is, while the rotary disc 14 is rotated, steam is jetted from the jet holes 17 and supplied into the bladder 8. Therefore, the steam supplied into the bladder 8 is agitated and its temperature is made uniform. Therefore, even if a horizontal vulcanizer in which the tire T is installed in an upright state is adopted as the vulcanizer as in the present embodiment, steam is supplied and the temperature is not changed between the upper side and the lower side in the bladder 8. There is no difference, and the tire T can be uniformly heated by the supply steam.

When the steam is supplied, the steam supplied into the bladder 8 is drained due to a temperature difference between the inside and outside of the bladder 8, and this drain is the lowest portion in the bladder 8, that is, the tire T. Collected intensively in the area corresponding to the lower tread. However, the accumulated drain is
Due to the difference between the high pressure inside the bladder 8 and the atmospheric pressure outside, the valve V is opened to be discharged to the outside through the drain suction pipe 13 and the drain discharge hole 12 of the center post 9.
The opening and closing of the valve V is controlled, for example, by opening the valve V for several seconds every few minutes measured by a timer (not shown). Further, a temperature sensor (not shown) is arranged near the lower end of the drain suction pipe 13, and the valve V is opened when the temperature of the drain drops below a predetermined temperature based on the temperature detection of the drain by the temperature sensor. May be.

As described above, by appropriately discharging the drain accumulated in the bladder 8, there is no fear that the heating temperature of the tire T becomes lower at the portion where the drain is accumulated as compared with the other portions. Therefore the tire T
Uniform heating of the whole can be performed more reliably. Therefore, as in the present embodiment, even if a horizontal vulcanizer is used as the vulcanizer, in which the tire T is mounted in an upright state and the drain is concentrated in a narrow range of the lower tread portion of the tire T. ,
The adverse effects of drain can be reliably eliminated. On the contrary, since the drain is concentratedly collected in the lower tread portion of the tire T, the tire is mounted in a horizontal state and the drain is dispersed over a wide range of the lower sidewall portion of the tire. Compared with the type vulcanizer, the drain can be easily and surely discharged through the drain suction pipe 13.

As described above, in this embodiment, when the tire is vulcanized, the rotary disc 14 is rotated and the ejection hole 1 is rotated.
Since steam is jetted from 7, the steam supplied into the bladder 8 is agitated and its temperature is made uniform.
Moreover, when the steam is supplied, the drain accumulated in the bladder 8 is discharged to the outside through the drain suction pipe 13 and the like.
Therefore, as in the present embodiment, the tire T is used as a vulcanizer.
Even if a horizontal vulcanizer installed in an upright position is used, the entire tire T can be heated uniformly. Therefore, the tire T can be uniformly vulcanized over the entire tire, and the quality of the entire tire T can be made uniform and good. Further, as a result, it is not necessary to set the vulcanization time based on the portion of the tire having a low heating temperature, so that the vulcanization time of the tire T can be shortened and the vulcanization can be efficiently performed. In addition, by shortening the vulcanization time of the tire T, the operating time of the vulcanizer is also shortened, and as a result, the consumption of energy such as electric power and fuel for operating the vulcanizer is also reduced. You can

Therefore, in this embodiment, it is possible to employ a horizontal vulcanizer capable of significantly reducing the equipment cost as compared with the vertical vulcanizer without adversely affecting the tire vulcanization. Of.

Further, in this embodiment, by providing the ejection holes 17 in a state of being inclined with respect to the radial direction of the rotary disc 14, the ejection force of steam from the ejection holes 17 is utilized to rotate the ejection holes 17. The disc 14 is rotated. Therefore, it is not necessary to provide another power source such as a motor to rotate the rotary disk 14, and the structure can be simplified to reduce the manufacturing cost. Further, since the drain suction pipe 13 is made of a flexible material such as rubber, there is a problem when the drain suction pipe 13 is exposed to the inside of the tire T or taken out from the inside of the tire T. There is no.

The present invention is not limited to the above-mentioned embodiment, and the constitution of each part may be modified and embodied as follows. (1) As shown by a chain line in FIGS. 1 and 2, a jet nozzle 19 made of a flexible material such as rubber or synthetic resin is detachably or fixedly attached to the opening of the jet hole 17. With this configuration, the steam supplied into the bladder 8 can be more effectively stirred, and the steam can be more effectively injected toward the inner surface of the tire T. Further, according to the change of the diameter of the tire T and the like, it is possible to easily cope with the change by simply changing the length of the ejection nozzle 19 without changing the diameter of the rotating disk 14.
Further, since the injection nozzle 19 is made of a flexible material, no trouble occurs when the injection nozzle 19 faces the inside of the tire T or is taken out from the inside of the tire T.

Further, in the injection nozzle 19, an injection hole 19a is provided at a position corresponding to the bead portion of the tire T,
The steam may be directly injected toward the bead portion of the tire T through the injection hole 19a. By doing so, it is possible to more effectively vulcanize the bead portion, which has a larger wall thickness and tends to require a longer time for vulcanization than other portions of the tire T.

(2) Adjusting the rotation speed of the rotary disk 14 to an appropriate speed by changing the angle of the ejection holes 17 with respect to the radial direction of the rotary disk 14 and the diameter and number of the holes 17. In addition, a barrier (not shown) is provided in the concave groove 14a of the rotating disc 14, or a friction member (not shown) is slidably contacted with the rotating disc 14 so that the rotating disc 14
The rotation speed of may be changed.

(3) The ejection holes 17 of the rotary disks 14 are made to face each other so that the rotary disks 14 are rotated in the directions opposite to each other. (4) Use only one rotating disk 14.

(5) The rotating disk 14 is rotated by a power source such as a motor. (6) Embodying the present invention in a vertical vulcanizer. The technical ideas other than the claims that can be understood from the above embodiments will be described below along with their effects.

(1) In the tire vulcanizer according to claim 1 or 2, the injection port is formed in a state of being inclined at a predetermined angle with respect to the radial direction of the rotating body, and the heat and pressure medium from the injection port is formed. A tire vulcanizer configured such that a rotational force is applied to a rotating body in accordance with ejection.

According to this structure, since it is not necessary to provide another power source such as a motor for rotating the rotating body, the structure can be simplified and the manufacturing cost can be reduced.

(2) The tire vulcanizer according to claim 1 or 2, wherein a jet nozzle is attached to the jet port so as to project outward. According to this structure, the steam supplied into the tire can be more effectively stirred, and the steam can be more effectively injected toward the inner surface of the tire. Also, according to the change of the tire diameter, etc., without changing the diameter of the rotating body,
This can be easily dealt with by simply changing the length of the ejection nozzle.

[0036]

As described above in detail, according to the present invention, a horizontal vulcanizer can be adopted to reduce the facility cost, and moreover, the entire tire can be heated uniformly, and the tire can be entirely covered. By uniformly vulcanizing the tire, the quality of the entire tire can be made uniform and good. Further, as a result, the vulcanization time of the tire can be shortened, the vulcanization can be efficiently performed, and the operating time of the vulcanizer can be shortened, so that the power, fuel, etc. for operating the vulcanizer can be shortened. It has an excellent effect that energy consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment in which the present invention is embodied in a horizontal vulcanizer.

FIG. 2 is a cross-sectional view taken substantially along the line AA in FIG.

[Explanation of symbols]

4 ... Right mold, 5 ... Left mold, 12 ... Drain discharge hole which constitutes drain discharge passage, 12 ... Drain suction pipe which constitutes drain discharge passage, 14 ... Rotating disc as a rotating body, 15 ... Bearing metal , 17 ... ejection holes as ejection ports, T ... tires.

Claims (5)

(57) [Claims] 1. A tire vulcanizer for vulcanizing by supplying a heat and pressure medium to the inside of a tire mounted in a mold, wherein the tire vulcanizer is disposed inside the tire and is rotatable in the circumferential direction of the tire.
The rotating body is provided and the outer peripheral portion of the rotating body is obliquely inclined with respect to the radial direction of the rotating body.
And a jet port provided in a state in which the heat and pressure medium is jetted toward the inside of the tire from the jet port.
Out, characterized in that it is similar rotating the pre <br/> Symbol rotating body rotating force due to ejection of the thermal hydraulic medium from該噴outlet al, constituted the heat pressure medium to supply the inside of the tire And a tire vulcanizer. 2. The tire is provided with a nozzle at the ejection port.
The tire vulcanizer according to claim 1, wherein the tire vulcanizer is configured to be injected into a bead portion of the tire. 3. The rotating bodies are in the same direction or opposite to each other.
It is composed of a pair of discs that rotate in the same direction.
The tire vulcanizer according to claim 1 or 2, which is a characteristic of the tire vulcanizer. 4. The axial direction of the rotating body inside the tire
Center post to be inserted from the
Fixed member and the inside of the tire provided on the fixed member.
A drain suction pipe for sucking the drain is provided, and the pair of rotating bodies are arranged on both sides of the fixing member in the axial direction.
The tire vulcanization according to claim 3, wherein the tire vulcanization is carried out.
Machine. 5. Thermal compression is applied to the inside of the tire mounted in the mold.
In a tire vulcanizing method of supplying a medium to perform vulcanization, a pair of rotating bodies axially inserted into the tire.
The rotary body by injecting a heat and pressure medium from the tire
While supplying heat and pressure medium to the inside of the tire while rotating it in the circumferential direction,
And drainage from the lower end inside the tire.
Thailand characterized by being put in and discharged to the outside
Vulcanization method.