JPH04224909A - Belt vulcanizing device and jacket to be used therefor - Google Patents

Abstract

PURPOSE:To provide a belt vulcanizing device which is not only usable even when the peripheral length of a belt varies, but also makes it easier to fit a mold for molding into a vulcanizer and withdraw it therefrom and, moreover, which is capable of vulcanizing an unvulcanized belt sleeve of good quality while keeping airtightness between a jacket and an upper lid, and provide a jacket to be used for said device. CONSTITUTION:The title device comprises an unvulcanized belt sleeve 30 mounted on the outer peripheral surface of a mold 28 for molding and, moreover, a cylindrical jacket 29, which are all fitted into a space between a support base 24 and an upper lid 25, both being installed in a vulcanizer 21. The jacket 29 has an extensible and retractable resilient cylindrical body 33 fitted inside a cylindrical case 32 and has a space 34 therebetween. The cylindrical case 32 is provided with air intake ports 41 and discharge ports 43 and can be connected to port opening and closing mechanisms 42 and to suction pipes 49, respectively, which are provided on the vulcanizer 21.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a belt vulcanizing device and a jacket used therein, and more particularly to a belt vulcanizing device for belt sleeves or wrapped belts such as raw edge belts, multi-ribbed belts, toothed belts, etc., and belt vulcanizing devices used therein. Regarding the jacket.

0002

2. Description of the Related Art A conventional belt vulcanizing device of this type, as shown in FIG. A cylindrical jacket 3 that can be elastically deformed is fitted concentrically on the outer circumferential surface, and the assembled product in the above configuration is installed on a support stand 5 located at the lower part of the vulcanizing can 4, and then placed in a mold 2 for forming. It has a structure in which an upper lid 6 is placed on top of the belt sleeve 1, and high-pressure steam is injected into the outside of the mold, and low-pressure steam is injected into the inside of the mold to vulcanize the unvulcanized belt sleeve 1. Note that both the high-pressure steam and low-pressure steam are introduced from the inlet 7, and the moisture inside is discharged from the drain port 8.

0003

[Problems to be Solved by the Invention] However, in conventional belt vulcanizing equipment, when the vulcanization of the belt sleeve is completed, the cylindrical jacket is extracted from the forming mold, and this mold is then removed from the vulcanizing can. Ta. At that time, the process of extracting the cylindrical jacket was performed by a worker, so there was a strong desire to streamline this process without depending on the worker.

[0004] Furthermore, above all, the jacket for belt vulcanization has a length of at most 1 to the outer circumference of the unvulcanized belt sleeve.
Unless the jacket has an inner circumference as large as an inch, the jacket cannot be expanded to strongly press against the back surface of the belt sleeve. For this reason, it was necessary to provide jackets for each belt with a different circumference.

[0005] In addition, since conventional jackets are put into a vulcanizer and expanded sufficiently, they are expanded under high temperature and high pressure, so if this process is repeated, the jacket itself will deteriorate due to heat and the inner circumferential length will change. there were. Not only that, the elastic skirts at both ends of the jacket, which are in pressure contact with the top cover and support stand, are exposed to high temperature and high pressure environments, so they quickly deteriorate due to heat and lose their elasticity, causing the length of the jacket to deteriorate. Sometimes the length became shorter. As a result, a gap is created between the jacket's elastic skirt and the top lid, and the sealing effect is lost.As a result, high-pressure steam from the outside of the mold infiltrates into the jacket through the elastic skirt, and the belt sleeve bulges due to the intrusion of steam. Also, although there was no problem in terms of appearance, there was a problem in that the core wire deteriorated.

Furthermore, since the elastic skirt does not press against both ends of the unvulcanized belt sleeve inserted into the mold during vulcanization, both ends of the belt sleeve are not sufficiently vulcanized after vulcanization. , I had no choice but to use rubber scrap for this part.

The present invention solves these problems and provides a jacket that can be used even if the circumference of the belt changes, is easy to insert and remove from a mold, and has a long service life. It is possible to vulcanize unvulcanized belt sleeves or belts with high quality while maintaining airtightness between the jacket and the top cover, and also to ensure vulcanization to both ends of the belt sleeve, eliminating the generation of rubber scraps. The purpose of the present invention is to provide a belt vulcanizing device that has the following characteristics.

[0008]

[Means for Solving the Problems] That is, in the belt vulcanizing apparatus of the present invention, an unvulcanized belt sleeve or a belt is provided on the outer peripheral surface of the mold between the support stand installed in the vulcanizing can and the upper lid. further, a cylindrical jacket is fitted concentrically to the outer peripheral surface of the mold assembly to form a mold assembly,
In a belt vulcanizing device whose interior is made airtight,
An elastic cylindrical body is fitted inside the cylindrical case as the jacket to form a space between the case and the elastic cylindrical body, and at least one air inlet and an outlet are provided in the cylindrical case. The inlet port and the outlet port are provided in communication with the space, and are configured to be connectable to an opening/closing mechanism provided in the vulcanizing can and a suction pipe, respectively.

[0009] Furthermore, the mouth opening/closing mechanism and the suction pipe provided in the vulcanizing can are movable by the operation of the cylinder.

Further, in the jacket of the present invention, an elastic cylindrical body is fitted inside a cylindrical case to form a space between the case and the elastic cylindrical body, and the space is formed in the cylindrical case. The invention is characterized in that at least one inlet and one outlet are provided so as to communicate with each other.

Elastic skirts that expand outward are provided on the upper and lower edges of the elastic cylindrical body, and these are attached to airtight cylindrical upper and lower frames, and one frame is connected to the cylindrical case via a spring. This also includes a configuration in which the frame is attached to the cylindrical case and the other frame is fixed to the cylindrical case. Furthermore, a grip portion may be attached to the cylindrical case.

0012

[Function] In the belt vulcanizing device of the present invention, the jacket consists of a cylindrical case and an elastic cylindrical body fitted inside the cylindrical case. Since the elastic cylindrical body can be expanded by sucking gas and brought into close contact with the cylindrical case, the inner diameter of the jacket is essentially increased and the mold with the unvulcanized belt sleeve attached is placed inside the jacket. The mold can be easily inserted into the jacket, and the mold can also be easily removed from the jacket.

Moreover, even when an unvulcanized belt sleeve having a large belt circumference is to be vulcanized, the above-mentioned forming mold can be inserted into the jacket, and such a belt sleeve can also be vulcanized.

Furthermore, when the upper edge of the jacket comes into contact with the top lid, since the elastic skirt is attached to the cylindrical case via a spring, the elastic skirt is pressed against the top lid with a certain repulsive force by the spring, and the inside of the jacket is airtight. It is possible to maintain one's sexuality. Therefore, the unvulcanized belt sleeve does not bulge, and the core wire does not deteriorate. Furthermore, since the jacket has elastic cylindrical bodies attached to the upper and lower frames, it has good dimensional stability and can be stably positioned on the support stand.

Furthermore, by using this jacket, the unvulcanized belt sleeve can be inserted up to both ends of the mold, and by pressing the elastic skirt against both ends of the belt sleeve, this part can be vulcanized. be able to.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view of the belt vulcanizing apparatus of the present invention, FIG. 2 is a longitudinal sectional view of the jacket, and FIG.
It is an enlarged view of the part. The belt vulcanizing device 20 of the present invention includes an openable and closable vulcanizing can 21 having a high-pressure steam inlet 22 and an outlet 23, a support 24 installed at the lower part of the can, and an upper part of the can. It consists of a mold assembly 26 placed between a top lid 25 located at

The mold assembly 26 includes the internal pressure introducing cylinder 2.
It consists of a forming mold 28 installed on a support base 24 having a support base 24 having a diameter of 7, and a jacket 29 placed concentrically at a constant interval on the outside of the forming mold 28. 30 is installed.

As shown in FIG. 2, the jacket 29 has a cylindrical case 32 made of metal or the like and an elastic cylindrical body 33 provided at a spaced interval inside the cylindrical case 32.
A space 34 between the elastic tube 2 and the elastic cylindrical body 33 is formed in a sealed manner. That is, the elastic cylindrical body 33 is made of, for example, vulcanized rubber, and has upper and lower elastic skirts 35 and 36 that expand outward at its upper and lower edges. The elastic skirts 35, 36 are wrapped around airtight cylindrical upper and lower frames 37, 38 that are present at this position. In particular, it is not necessary to glue the elastic skirts 35, 36 to the upper and lower frames 37, 38.

The upper frame 37 is connected to a support ring 39 fixed to the tip of the cylindrical case 32 via a bellows-shaped spring 40. The spring 40 presses the upper elastic skirt 35 against the upper lid 25 with a constant repulsive force, thereby enhancing and maintaining the sealing effect with the upper lid 25. On the other hand, the lower frame 3
8 is directly connected to the cylindrical case 32. Therefore, the jacket 29 of the present invention has good dimensional stability and can be stably positioned on the support base 24.

A gripping portion 52 is attached to the support ring 39, which is attached to the vulcanizing can 21 of the jacket 29.
This is to make it easier to take things in and out.

Furthermore, two inlet ports 41, 41 and two outlet ports 43, 43 communicating with the space 34 are provided in the wall of the cylindrical case 32. The inlet port 41 is located at the tip of the flange protruding from the cylindrical case 32, and serves as an inlet for introducing a pressure medium such as high-pressure steam inside the vulcanizer. It has a shape and serves as an outlet for discharging and suctioning gas and moisture in the space 34.

[0023]The vulcanizing can 21 has the air inlet 41,
a mouth opening/closing mechanism 42 for opening and closing the mouth 41; and the discharge port 43.
It has a movable suction pipe 49 that is continuous with the suction pipe 49. That is, the mouth opening/closing mechanism 42 has a rod 45 having a flange 44 at its tip and a cylinder 48 for moving the rod.By the operation of this cylinder 48, the flange 44 is connected to and separated from the inlet port 41, thereby opening the inlet port. 41 to open and close.

On the other hand, the suction pipe 49 is connected to the discharge port 43 by the operation of the cylinder 50, and is connected to the mold 28 for forming.
Vacuum the jacket when putting it in and taking it out, and drain the moisture inside the jacket during vulcanization. Suction is performed by a normal vacuum pump, etc., and is not shown here.

In this manner, the elastic cylindrical body 33 closes the inlet port 41 by the operation of the opening/closing mechanism 42, and closes the outlet port 41.
3 by suctioning and vacuuming the gas in the space 34, and by opening the air inlet 41 and releasing the vacuum, it approaches the outer peripheral surface of the unvulcanized belt sleeve 30 and is opened. When a pressure medium such as high pressure steam is introduced through the inlet 41, the elastic cylindrical body 33 is pressed against the unvulcanized belt sleeve 30.

The process of vulcanizing an unvulcanized belt sleeve using the belt vulcanizing device 20 using the jacket 29 will be described below with reference to FIGS. 4 to 7.

First, as shown in FIG. 4, the jacket 29 is installed on the support stand 24 inside the vulcanizing can 20. At this time, both the inlet port 41 and the outlet port 43 are open.

Next, the inlet port 41 is closed by the flange 44 of the opening/closing mechanism 42 provided in the vulcanizing can 20, and at the same time, the suction pipe 49 is moved by the operation of the cylinder 50 and connected to the outlet port 43, and then the vacuum By doing so, the elastic cylindrical body 33 is expanded and brought into contact with the inner wall of the cylindrical case 32. As a result, the inner diameter of the jacket 29 becomes larger, and the mold 28 equipped with the unvulcanized belt sleeve 30 can be easily inserted into the jacket 29. (See Figure 5.)

Then, when the vacuum is released and the rod 45 of the opening/closing mechanism 42 is moved to open the inlet 41, the elastic cylindrical body 33 returns to its original state along the outer peripheral surface of the unvulcanized belt sleeve 30. restore to state. (See Figure 6.)

0
[030] After that, the upper lid 25 of the vulcanizing can 20 is attached to the jacket 2.
9, external pressure steam is introduced into the vulcanizing can 29 and internal pressure steam is introduced into the mold 28 for vulcanization. At this time, external pressure steam is introduced into the space 34 of the jacket through the inlet 41, and the unvulcanized belt sleeve 30 is pressed by the elastic cylindrical body 33. At the same time, suction pipe 4
Drain water from step 9. Moreover, since the elastic skirt 35 expands and presses against the tip of the unvulcanized belt sleeve 30, the entire region of the belt sleeve 30 is reliably vulcanized. (See Figure 7.)

When vulcanization is completed and the mold 28 is removed from the vulcanizing can 20, the elastic cylindrical body 33 may be expanded by vacuum to increase the inner diameter of the jacket.

As described above, according to the belt vulcanizing apparatus of the present invention, by vacuuming the elastic cylindrical body 33, it is possible to bring it into close contact with the cylindrical case 32, thereby substantially increasing the inner diameter of the jacket 29. , mold 2
8 can be easily installed on and taken out from the support stand 24. Moreover, the jacket 29 can be used even if the outer circumference of the belt to be formed changes somewhat, and both ends of the unvulcanized belt sleeve 30 are also reliably vulcanized by the expansion of the elastic skirt 35, resulting in no rubber scrap. It also disappears.

The belt vulcanizing apparatus of the present invention can also vulcanize belt sleeves such as multi-rib belts, raw edge belts, toothed belts, or a plurality of wrapped belts.

[0034]

[Effects of the Invention] As described above, in the belt vulcanizing device of the present invention, elastic cylindrical bodies are inserted at intervals inside the cylindrical case as a jacket installed in the vulcanizing can. If the inner diameter of the jacket is substantially increased by sucking the gas in the space formed between these members and expanding the elastic cylindrical body, the mold can be smoothly inserted and removed. . Moreover, this jacket can be applied even when unvulcanized belt sleeves having different circumferential lengths are to be cured.

Furthermore, in the belt vulcanizing device, the elastic skirts provided on the elastic cylindrical body are attached to the upper and lower frames, and one of the upper frames is attached to the cylindrical case via a spring. The skirt is always in pressure contact with the top lid with a constant repulsive force, making it possible to seal efficiently, and the effect is that the unvulcanized belt sleeve does not bulge and the core wire is not deteriorated and can be vulcanized uniformly. be. Both ends of the unvulcanized belt sleeve are also pressed against each other by the expansion of the elastic skirt and are reliably vulcanized, eliminating the generation of rubber scraps.

On the other hand, the jacket of the present invention has the same effect as described above, and in addition, since the shape of the elastic skirt is maintained by the upper and lower frames,
Even if the elastic skirt deteriorates due to heat, there will be no dimensional change in the length direction of the jacket, resulting in excellent dimensional stability, stable positioning on the support base of the vulcanizing can, and a long service life.

[0037] If the cylindrical case of the jacket is provided with a gripping portion, it becomes possible to easily set it on the support stand of the vulcanization can or take it out using means such as a robot.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a belt vulcanizer according to the present invention.

FIG. 2 is a longitudinal cross-sectional view of a jacket used in the belt vulcanization apparatus of the present invention.

FIG. 3 is an enlarged view of part A in FIG. 2;

FIG. 4 shows the vulcanization process of an unvulcanized belt sleeve using the jacket of the present invention, in which the jacket is installed on a support stand of a vulcanization can.

FIG. 5 shows a step subsequent to the step shown in FIG. 4, in which a forming mold is installed in a jacket.

FIG. 6 shows a step subsequent to the step shown in FIG. 5, in which the elastic cylindrical body of the jacket is contracted to its original state along the outer peripheral surface of the unvulcanized belt sleeve.

FIG. 7 shows a step subsequent to the step shown in FIG. 6, in which an unvulcanized belt sleeve is vulcanized.

FIG. 8 is a longitudinal sectional view of a conventional belt vulcanization device.

[Explanation of symbols]

20 Belt vulcanization device 25 Top lid 28 Molding mold 29 Jacket 30 Unvulcanized belt sleeve 32 Cylindrical case 33 Elastic cylindrical body 34 Space part 35 Upper elastic skirt 36 Lower elastic skirt 37 Upper frame 38 Lower frame 41 Inlet 42 Mouth opening/closing mechanism 43 Discharge port 49 Suction pipe

Claims (5)

[Claims] [Claim 1] An unvulcanized belt sleeve or belt is attached to the outer circumferential surface of the mold between the support stand installed in the vulcanizing can and the upper lid, and a cylindrical jacket is concentrically attached to the outer circumferential surface of the unvulcanized belt sleeve or belt. In a belt vulcanizing device in which a mold assembly is formed by fitting the mold assembly into a shape, and the inside of the mold assembly is made airtight, an elastic cylindrical body is fitted inside a cylindrical case as the jacket, and the case and the elastic tube are a space is formed between the cylindrical case and the cylindrical case, at least one inlet and an outlet are provided in the cylindrical case so as to communicate with the space, and the inlet and the outlet are vulcanized. A belt vulcanizing device characterized by being connectable to a mouth opening/closing mechanism provided on a can and a suction pipe. 2. The belt vulcanizing apparatus according to claim 1, wherein the mouth opening/closing mechanism provided on the vulcanizing can and the suction pipe are movable by actuation of a cylinder. 3. A jacket used for an unvulcanized belt sleeve or a belt vulcanizing device, in which an elastic cylindrical body is inserted inside a cylindrical case to form a space between the case and the elastic cylindrical body. A jacket for use in a belt vulcanizer, characterized in that the cylindrical case is provided with at least one inlet and an outlet so as to communicate with the space. 4. Elastic skirts that expand outward are provided on the upper and lower edges of the elastic cylindrical body, and these are attached to airtight cylindrical upper and lower frames, and one frame is attached to the cylindrical case via a spring. 4. The jacket for use in a belt vulcanizer according to claim 3, wherein the other frame is fixed to the cylindrical case. 5. A jacket for use in a belt vulcanizing device according to claim 3, wherein the cylindrical case is equipped with a gripping portion.