JPH11156857A - Method and apparatus for vulcanizing belt sleeve and others - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the frequency of vulcanizer replacement greatly when a mold is changed to enable remarkable reduction of a mold change time as a whole, to contribute to the reduction of labor or the number of operators, to decrease the number of existing vulcanizers and jackets remarkably, and to reduce a preservation space greatly. SOLUTION: One end face of a molding mold 2 in which an unvulcanized belt sleeve 3 is attached to the peripheral surface is mounted on a mold support member 4, a jacket 5 mounted in a closed state on the inside of an outer mold 6 is arranged on the peripheral surface side of the belt sleeve 3, a pressure medium is injected into a space 20 formed between the jacket 5 and the outer mold 6, the medium is discharged to expand/contract the jacket 5, and the belt sleeve 3 is vulcanized. In this process, a lid is not used for the molding mold 2 and the other end face of the jacket 5, the clearance between the molding mold 2 and the jacket 5 is made to communicate with the outside, and a size adjusting sleeve 30 is set on the inside of the jacket attachably/detachably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vulcanizing apparatus and a vulcanizing method for a belt sleeve or the like, and more particularly, to a belt sleeve such as a low-edge belt, a V-ribbed belt, a toothed belt, a flat belt, etc. The present invention relates to a vulcanizing apparatus and a vulcanizing method such as a belt sleeve capable of vulcanizing a belt sleeve having a different size so as not to be vulcanized so that a molding die can be easily taken out and can be performed in a short time. .

[0002]

2. Description of the Related Art In a conventional belt vulcanizing apparatus, an unvulcanized belt sleeve is mounted on an outer peripheral surface of an inner hollow forming die, and further, an elastically deformable cylindrical jacket is concentrically fitted on the outer peripheral surface. , The one assembled in the above configuration is installed via an elastic packing material on a support stand located below in the vulcanizing can, and further, an upper lid is placed on the mold, and high-pressure steam is applied to the outside of the mold, It has a structure in which low-pressure steam is pressed into the mold to cure the unvulcanized belt sleeve. The high-pressure steam and the low-pressure steam are both introduced from the inlet, and the internal moisture is discharged from the drain.

In the belt vulcanizing apparatus, high-pressure steam on the outside of the jacket presses the jacket and then presses the unvulcanized belt sleeve to discharge air existing in the gap between the jacket and the forming die and to release the air. An object of the present invention is to obtain a high-quality belt sleeve by molding and solidifying rubber into a shape and making it dense without bubbles.

Further, Japanese Patent Application Laid-Open No. Hei 4-224909 discloses that a space is formed between a cylindrical case and an elastic cylindrical body by inserting the elastic cylindrical body into the inside of the cylindrical case. A jacket for use in a vulcanizing apparatus having at least one inlet and one outlet in a case is disclosed. Also,
Japanese Patent Publication No. 2-32968 discloses a similar one.

[0005]

However, in the conventional vulcanizing apparatus, the airtightness between the jacket and the upper lid is improved, the seal between the jacket and the upper lid is improved, and high-pressure steam is prevented from entering the inside of the jacket. doing. If high-pressure steam enters the inside of the jacket, the core fiber made of glass fiber deteriorates, and a problem occurs that the function of the belt is impaired.

For this reason, in order to improve the airtightness between the jacket and the upper lid, if the amount of air contained in the space between the jacket and the mold increases, high-pressure steam outside the jacket is not passed through the jacket. Even if the vulcanized belt sleeve was pressed against and the air existing between the jacket and the molding mold was to be expelled, the pressure reached an equilibrium in an insufficient state, and as a result, a belt sleeve containing bubbles was formed.

In order to prevent this, the upper lid and the vulcanizing can wall are connected by a pipe, and the contained air is discharged into the atmosphere outside the vulcanizing can and a sufficient vulcanizing pressure is applied to the unvulcanized belt sleeve. A vulcanizing apparatus has also been proposed which obtains a high-quality belt sleeve by making it dense without bubbles.

However, even in this vulcanizing apparatus, since the pipe connecting the upper lid and the vulcanizing can wall is constantly exposed to high-temperature and high-pressure live steam, the pipe is frequently corroded and must be replaced frequently. In addition, even if a hole is formed in the pipe due to corrosion, there is a problem that it is difficult to find it visually depending on the size of the hole. Further, when the replacement time of the pipe is delayed, high-pressure steam penetrates into the unvulcanized belt sleeve inside the jacket from the hole opened by corrosion, causing a problem that the core wire is deteriorated.

As a vulcanizing apparatus which has recently solved such problems, Japanese Patent Application Laid-Open No. HEI 8-118363 discloses a vulcanizing apparatus (pot) equipped with a rubber jacket, in which a mold having a belt sleeve molded therein is inserted. The rubber jacket is expanded with compressed air, and steam is injected from the inside of the mold to vulcanize it.The air inside the gap between the jacket and the mold is released to the outside without resistance and the pressure is uniform. By performing the vulcanization, a high-quality belt sleeve having no air bubbles on a flat surface is vulcanized and formed, and the mold is easily and quickly removed.

However, since the expansion and contraction of the rubber jacket used in this apparatus is limited, the size range of the belt sleeve to be vulcanized is limited, and the pot needs to be replaced every time the mold is changed. Had become. This is not limited to the time required for changing the steps, but when changing the steps, a hoist, a bogie, and the like are used. In addition, it is necessary to keep all the pots and jackets for each size, which increases initial costs and requires a large pot storage space.

The present invention has been made to solve the above problems, and the frequency of vulcanizing device replacement at the time of changing the mold is greatly reduced.
The vulcanizing device such as a belt sleeve, which contributes to the reduction of the work load of the operator due to the reduction in the number of step changes, greatly reduces the number of vulcanizing devices and jackets to be held, and also greatly reduces the storage space. An object is to provide a vulcanization method.

[0012]

That is, according to the first aspect of the present invention, one end face of a molding die having an unvulcanized belt sleeve mounted on an outer peripheral surface is installed on a mold supporting member, and the inner side of an outer die is provided. A jacket attached in a sealed state is arranged on the outer peripheral surface side of the unvulcanized belt sleeve, and a pressure medium is injected and discharged into a space provided between the jacket and the outer mold to expand and contract the jacket. In the apparatus for vulcanizing the unvulcanized belt sleeve, the gap between the molding die and the jacket is communicated to the outside without using a lid on the other end surface of the molding die and the jacket, and the size is adjusted inside the jacket. In a vulcanizing device such as a belt sleeve with a removable sleeve, the size adjustment sleeve can be mounted inside the jacket even if the size range of the vulcanized belt sleeve changes small. It can be corresponding thereto by.
For this reason, it is not necessary to replace the vulcanizing device every time the mold is changed, and as a whole, the time required for changing the setting is greatly reduced, and the work load of the operator due to the reduction in the number of times of the change is reduced.
And the number of vulcanizers and jackets to be kept is greatly reduced, and the storage space is also greatly reduced.

Further, since a lid is not used on the other end surface of the molding die and the jacket, between the unvulcanized belt sleeve and the unvulcanized belt sleeve and the jacket or between the unvulcanized belt sleeve and the molding die. Since the internal air is freely discharged into the atmosphere because there is no top cover, a high quality belt sleeve containing no air bubbles can be obtained, and the mold can be removed easily and in a short time. There is also an effect.

According to a second aspect of the present invention, there is provided a method of vulcanizing an unvulcanized belt sleeve disposed inside by inflating a jacket attached in a hermetically sealed state and heating the unvulcanized belt sleeve. The size adjustment sleeve is detachably mounted inside the jacket attached in a sealed state inside, the space provided between the jacket and the outer mold is sucked, and the size adjustment sleeve is deformed. Insert the mold with the unvulcanized belt sleeve into the sleeve for adjusting the size, place the heat medium in the mold, put the pressure medium in the space, and expand the jacket to unvulcanize. A method for vulcanizing a belt sleeve or the like comprising a step of vulcanizing a belt sleeve has the same function and effect as the first aspect of the present invention.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of a vulcanizing apparatus such as a power transmission belt of the present invention, and FIG. The vulcanizing apparatus 1 of the present invention includes a molding die 2 having an unvulcanized belt sleeve 3 mounted on the outer peripheral surface, a mold supporting member 4 on which the molding die 2 is installed, and a sealing state on the outer peripheral surface side of the unvulcanized belt sleeve 3. It is composed of a jacket 5 attached to an outer mold and an outer mold 6.

The molding die 2 is for a toothed belt having an axial groove provided at regular intervals along the circumferential direction, or has a flat shape without such a groove. There is a low-edge belt or a V-ribbed belt, and a heating medium containing section 8 for heating a forming mold with a heating medium such as steam is provided inside. The other end of the molding die 2 has a protruding shaft 9, which is a grip for facilitating the insertion and removal of the molding die 2.

The mold support member 4 has an inlet 10 and an outlet 11
The internal pressure introducing cylinder 12 is connected to the internal pressure introducing cylinder 12.
Packing of elastic body made of rubber and urethane around the body 1
3 is laid, and the mold 2 is installed.
The mold support member 4 is, for example, an elongated plate.
A plurality of internal pressure introducing cylinders 12 and packings 13 are arranged at regular intervals, and a plurality of molding dies 2 are installed so that the unvulcanized belt sleeves 3 can be vulcanized simultaneously or individually at a certain time.

Inside a cylindrical outer mold 6, a jacket 5 made of an elastic body made of rubber and urethane that can expand and contract and expand.
Are disposed at the upper and lower ends, and the bent portion 1 protrudes outward.
The auxiliary member 17 is fixed to the outer die 6 with bolts 18 or the like while the upper and lower members 6 are sandwiched between the pair of upper and lower auxiliary members 17 and the outer die 6, and a space 20 is formed between the jacket 5 and the outer die 6 in a sealed manner. I have. The outer die 6 can be moved on the die support member 4 and installed at another position.

An injection port 21 communicating with the space 20 is formed in the side wall of the outer mold 6. The injection port 21 pressurizes water vapor, air, or the like, which is a pressure medium, and sends the pressurized medium into the space 20. A pressurizing device 24 such as is mounted on the pipe 25.

Thus, in the vulcanizing apparatus 1 of the present invention, the gap 26 between the molding die 2 and the jacket 5 is communicated to the outside without using the upper lid on the upper end surfaces of the molding die 2 and the jacket 5. Vulcanization is performed, and air existing between the jacket 5 and the mold 2 is freely released to the outside without resistance during the vulcanization, whereby the belt sleeve 3 containing no air bubbles can be obtained.

Further, in the vulcanizing apparatus 1 of the present invention, when the unvulcanized belt sleeve 3 cannot be vulcanized within the expansion range of only the jacket 5 and smaller than the inner diameter L of the jacket 5, the vulcanizing apparatus 1 has a predetermined shape as shown in FIG. A size adjusting sleeve 30 having a thickness a is detachably mounted inside the jacket 5. The size adjusting sleeve 30 is made of a vulcanized rubber or polyurethane elastomer having a cylindrical shape.
Is inserted after the inside of the space 20 is vacuumed and its inner diameter is enlarged, and the jacket 5 is elastically restored and closely adhered to its inner peripheral surface to make the inner diameter (L-2a).

When the molding die 2 with the unvulcanized belt sleeve 3 is fitted and inserted, the inside of the space 20 of the jacket 5 is vacuumed to enlarge the inner diameter of the size adjusting sleeve 30 and then fitted. Thereafter, the jacket 5 is expanded to pressurize the unvulcanized belt sleeve 3, and at the same time, a heating medium is put into the heat medium accommodating section 8 of the mold 2 and heated to vulcanize.

The size adjusting sleeve 30 can be prepared in several types having different wall thicknesses.
One vulcanizing device 1 can vulcanize unvulcanized belt sleeves 3 of widely different sizes.

The process of vulcanizing the unvulcanized belt sleeve 3 using the vulcanizing apparatus 1 of the present invention will be described below with reference to the drawings. When the unvulcanized belt sleeve 3 cannot be pressurized in the expansion range of the jacket 5, the inside of the space 20 of the jacket 5 is vacuumed to increase its inner diameter,
A size adjusting sleeve 3 having a predetermined thickness a therein.
After inserting 0, the jacket 5 is elastically restored and is brought into close contact with the sleeve 30 for size adjustment.

The inside of the space 20 of the jacket 5 is vacuumed to increase its inner diameter, and the molding die 2 with the unvulcanized belt sleeve 3 is inserted therein. 5 is elastically restored, and the size adjusting sleeve 30 is brought into close contact with the unvulcanized belt sleeve 3.
(See Fig. 5)

Then, the pressurizing device 24 is operated to supply pressurized steam as a pressure medium into the space 20 to expand the jacket 5 and pressurize the unvulcanized belt sleeve 3. At the same time, heated steam is introduced from the inlet 10 of the mold support member 4 into the heat medium accommodating portion 8 of the mold 2 via the internal pressure introducing tube 12 to heat the mold 2 and to form the unvulcanized belt sleeve 3. Vulcanize. (See Fig. 6)

The air existing between the unvulcanized belt sleeve 3 and the size adjusting sleeve 30 or between the unvulcanized belt sleeve 3 and the molding die 2 is freely discharged into the atmosphere because there is no upper cover. Therefore, a high quality belt sleeve containing no air bubbles can be obtained. Needless to say, since a liquid is used as the pressure medium, a pressure that is more uniform than that of a gas can be applied, and a belt sleeve having a flat surface without unevenness can be obtained.

After vulcanization, as shown in FIG. 5, the inside of the space 20 between the jacket 5 and the outer mold 6 is vacuumed to shrink the jacket 5, and then the molding die 2 is taken out. Since there is no vulcanizing can or top lid compared to the vulcanizing equipment,
It is easy and can be taken out in a short time.

If the unvulcanized belt sleeve 3 can be pressurized within the expansion range of the jacket 5 alone, the size adjusting sleeve 30 is separated from the jacket 5, and the inside of the space 20 of the jacket 5 is removed as described above. Is vacuumed to increase its inner diameter, in which the unvulcanized belt sleeve 3 is placed.
After the mold 2 having the mold is inserted, the jacket 5 is expanded and the unvulcanized belt sleeve 3 is pressurized. At the same time, heated steam is introduced from the inlet 10 of the mold support member 4 via the internal pressure introducing cylinder 12. The unmolded belt sleeve 3 is vulcanized by heating the mold 2 in the heat medium accommodating portion 8 of the mold 2 and heating the mold 2.

[0030]

As described above, in the vulcanizing apparatus and the vulcanizing method for a belt sleeve or the like according to claim 1 or 2 of the present application, the molding die and the jacket are formed without using a lid on the other end surface of the molding die and the jacket. Since the gap portion of the belt communicates with the outside and the size adjustment sleeve is detachably mounted inside the jacket, even if the unvulcanized belt sleeve cannot be pressurized within the expansion range of the jacket, the size can be reduced. This can be accommodated by installing an adjustment sleeve inside the jacket, which eliminates the need to replace the vulcanizing device each time the mold is changed, and significantly reduces the changeover time as a whole, and It contributes to the reduction of the work load of workers due to the reduction in the number of step changes, and the number of vulcanizing equipment and jackets to be held is greatly reduced, and the storage space is also significantly reduced. There is an effect that can be bet.

Further, since no lid is used on the other end surface of the molding die and the jacket, the air existing between the unvulcanized belt sleeve and the jacket or between the unvulcanized belt sleeve and the molding die, Since there is no upper lid, the belt is freely discharged into the atmosphere, so that a high-quality belt sleeve containing no air bubbles can be obtained, and there is also an effect that the mold can be easily and quickly taken out.

[Brief description of the drawings]

FIG. 1 is a plan view of a vulcanizing device such as a power transmission belt according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view showing a state where a molding die is taken out in a vulcanizing apparatus such as a power transmission belt according to the present invention.

FIG. 4 is a perspective view of a size adjusting sleeve used in the present invention.

FIG. 5 is a view showing a state where a molding die having an unvulcanized belt sleeve is inserted into a size adjusting sleeve 3 in the present invention.

FIG. 6 is a view showing a state where an unvulcanized belt sleeve mounted on a molding die is vulcanized in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vulcanizing apparatus 2 Mold 3 Belt sleeve 4 Mold support member 5 Jacket 6 Outer die 17 Auxiliary member 20 Space part 21 Injection port 30 Sleeve for size adjustment

Claims (2)

[Claims] 1. An unvulcanized belt sleeve having a non-vulcanized belt sleeve mounted on an outer peripheral surface, one end face of which is mounted on a mold support member, and a jacket which is hermetically mounted inside an outer mold is provided on an outer periphery of the unvulcanized belt sleeve. A pressure medium is injected and discharged into a space provided between the jacket and the outer mold to expand and contract the jacket to vulcanize the unvulcanized belt sleeve. A belt sleeve characterized in that a gap between the molding die and the jacket is communicated to the outside without using a lid on the other end surface of the mold and the jacket, and a size adjusting sleeve is detachably mounted inside the jacket. Etc. vulcanizing equipment. 2. A method of vulcanizing an unvulcanized belt sleeve disposed inside by inflating a jacket which is hermetically mounted and vulcanizing by pressurizing and heating the unvulcanized belt sleeve. A size adjustment sleeve is detachably mounted inside the jacket, the space provided between the jacket and the outer mold is sucked, the size adjustment sleeve is deformed, and an unvulcanized belt sleeve is mounted on the outer peripheral surface Inserting the formed mold into the size adjusting sleeve, flowing a heat medium into the mold, and inserting a pressure medium into the space to expand the jacket, thereby vulcanizing the unvulcanized belt sleeve. A vulcanizing method for a belt sleeve or the like, characterized by comprising: