JPH074815B2 - Belt vulcanizer and jacket used for the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt vulcanizing apparatus and a jacket used therefor, and more particularly to a belt vulcanizing apparatus for a belt sleeve such as a low edge belt, a multi-ribbed belt, a toothed belt or a wrapped belt, and a belt vulcanizing apparatus for the same. Regarding the jacket.

[0002]

2. Description of the Related Art A conventional belt vulcanizing apparatus of this type, as shown in FIG. 8, shows an inner hollow molding mold 2 in which an unvulcanized belt sleeve 1 is wound around an outer peripheral surface thereof. A cylindrical jacket 3 which is elastically deformable is concentrically fitted on the outer peripheral surface, and the one assembled as described above is placed on a support stand 5 located below the vulcanization can 4, and the molding mold 2 is further provided. The upper cover 6 is placed on the upper part of the mold, and high pressure steam is injected into the outside of the molding mold and low pressure steam is injected into the inside of the molding mold to vulcanize the unvulcanized belt sleeve 1. Both the high-pressure steam and the low-pressure steam are introduced through the inlet 7, and the water inside is discharged through the drain port 8.

[0003]

However, in the conventional belt vulcanizing apparatus, when the vulcanization of the belt sleeve is completed, the cylindrical jacket is pulled out from the molding mold, and this mold is taken out from the vulcanization can. It was At that time, since the step of extracting the cylindrical jacket was performed by the operator, it was strongly desired to rationalize the step without depending on the operator.

More than anything else, the belt vulcanizing jacket is at most 1 per the outer peripheral length of the unvulcanized belt sleeve.
Unless the inner circumferential length is large, the above jacket cannot be expanded to press the back surface of the belt sleeve strongly. For this reason, it is necessary to provide a jacket for each belt having a different circumferential length.

Further, since the conventional jacket is put into a vulcanizer and sufficiently expanded, it is expanded under high temperature and high pressure. Therefore, if this is repeated, the jacket itself is thermally deteriorated and the inner peripheral length is changed. there were. Not only that, but because the elastic skirts on both ends of the jacket that are pressed against the upper lid and the support stand are still under high temperature and high pressure environment,
In some cases, the length of the jacket was shortened due to the early deterioration of heat and the loss of elasticity of the skirt. Therefore, a gap is created between the elastic skirt of the jacket and the upper lid, and the sealing effect is lost.As a result, high-pressure steam outside the mold enters the inside of the jacket from the elastic skirt, and the belt sleeve bulges due to the invasion of steam. There was also a problem that the core wire deteriorates although there is no problem in appearance.

Furthermore, since the elastic skirt does not press the both ends of the unvulcanized belt sleeve fitted in the molding mold during vulcanization, both ends of the belt sleeve after vulcanization are not sufficiently vulcanized. , I had to make this part a rubber scrap.

The present invention solves these problems and provides a jacket that can be used even if the belt circumference changes, and that the molding mold can be easily inserted and removed and has a long life. In addition, it is possible to vulcanize the unvulcanized belt sleeve or belt with good quality by maintaining the airtightness between the jacket and the upper lid, and to surely vulcanize both ends of the belt sleeve to eliminate the generation of rubber scrap. An object of the present invention is to provide a belt vulcanizing device.

[0008]

That is, in the belt vulcanizing apparatus of the present invention, an unvulcanized belt sleeve or belt is mounted on the outer peripheral surface of a molding mold and a cylindrical jacket is concentrically formed on the outer peripheral surface. Between the support and the top cover installed in the vulcanizer.
In the belt vulcanizing apparatus interposed in the above, the elastic cylindrical body is inserted into the inside of the cylindrical case as the jacket to form a space portion that maintains airtightness between the case and the elastic cylindrical body, -Like case is provided with at least one inlet and outlet so as to communicate with the space, and these inlet and outlet can be connected to the mouth opening and closing mechanism provided in the vulcanization can and the suction pipe, respectively. It is in the configuration.

Further, the mouth opening / closing mechanism and the suction pipe provided on the vulcanization can are moved by the operation of the cylinder.

Further, in the jacket of the present invention, an elastic tubular body is fitted inside the cylindrical case to form a space between the case and the elastic tubular body, and the space is provided in the cylindrical case. At least one air inlet and an air outlet are provided so as to communicate with each other , and an elastic skirt that expands outward is formed at the upper and lower edges of the elastic tubular body to provide airtightness .
It also includes a configuration in which it is mounted on a cylindrical upper and lower frame, one frame is attached to the cylindrical case via an elastic member , and the other frame is fixed to the cylindrical case. Further, a grip may be attached to the cylindrical case.

[0011]

[0012]

In the belt vulcanizing apparatus of the present invention, the jacket is made up of the cylindrical case and the elastic tubular body fitted and inserted in the cylindrical case, and moreover, in the space formed between the case and the elastic tubular body. Since the elastic cylindrical body can be expanded by being sucked with gas so that the elastic cylindrical body can be brought into close contact with the cylindrical case, the inner diameter of the jacket is substantially increased to form a molding mold in which the unvulcanized belt sleeve is mounted. The molding mold can be easily inserted into the jacket and the molding mold can be easily removed from the jacket.

Moreover, even when vulcanizing an unvulcanized belt sleeve having a large belt circumference, the molding mold can be inserted into the jacket, and such a belt sleeve can be vulcanized.

When the upper edge of the jacket abuts the upper lid, the elastic skirt is attached to the cylindrical case via a spring, so that the spring presses the upper lid with a constant repulsive force to keep the inside of the jacket airtight. It can retain sex. Therefore, the unvulcanized belt sleeve does not bulge and the core wire does not deteriorate. Moreover, since the jacket has elastic cylindrical bodies mounted on the upper and lower frames, the jacket has good dimensional stability and can be stably positioned on the support base.

Further, by using this jacket, the unvulcanized belt sleeve can be fitted into both ends of the molding mold, and the elastic skirt is vulcanized to this portion by being pressed against both ends of the belt sleeve. be able to.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a vertical sectional view of a belt vulcanizing apparatus of the present invention, FIG. 2 is a vertical sectional view of a jacket, and FIG. 3 is an enlarged view of a portion A in FIG. The belt vulcanizing apparatus 20 of the present invention includes a vulcanizing can 21 that has an inlet 22 and an outlet 23 for high-pressure steam and that can be opened and closed, and a support base 24 installed below the can.
It is composed of a mold assembly 26 placed between the upper lid 25 and the upper lid 25 in the same can.

The mold assembly 26 includes the internal pressure introducing cylinder 2
7 is composed of a molding mold 28 installed on a support base 24 and a jacket 29 which is concentrically arranged outside the molding mold 28. The molding mold 28 has an unvulcanized belt sleeve. 30 is attached.

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 inside the cylindrical case 32 with a space therebetween. The space 34 between the body 33 and the body 33 is formed in a hermetically sealed manner. That is, the elastic tubular body 33 is made of, for example, vulcanized rubber, and has upper and lower elastic skirts 35 and 36 that expand outward in the upper and lower edges thereof. Elastic skirt 35 and 36, imparts hermeticity present in this position
It is wound around the cylindrical upper and lower frames 37, 38. In particular, the elastic skirts 35 and 36 are attached to the upper and lower frames 3
It is not necessary to adhere to 7, 38.

Further, the upper frame 37 is connected to a support ring 39 fixed to the tip of the cylindrical case 32 via an elastic member composed of a belofurum-shaped spring 40. The spring 40 presses the upper elastic skirt 35 against the upper lid 25 with a constant repulsive force,
The sealing effect with and is enhanced, and this is maintained. On the other hand, the lower frame 38 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 grip 52 is attached to the support ring 39, which is the vulcanization can 21 of the jacket 29.
This is because it is easy to put it in and take it out.

Further, the wall of the cylindrical case 32 is provided with two inlets 41, 41 and two outlets 43, 43 communicating with the space 34. The air inlet 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 in the vulcanizer, and the outlet 43 is the same as the air inlet 41. It has a shape and serves as an outlet for discharging and sucking gas and water in the space 34.

Then, the vulcanization can 21 has the inlet 41,
A mouth opening / closing mechanism 42 for opening and closing the mouth of 41, and the outlet 43
It has a movable suction pipe 49 which is continuous. That is, the mouth opening / closing mechanism 42 has a rod 45 having a flange 44 at the tip and a cylinder 48 for moving the rod 45. By the operation of the cylinder 48, the flange 44 is connected to and separated from the air inlet 41 to separate the air inlet. 41 is opened and closed.

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 molding mold 28.
Vacuum when you put in and out, and drain the water inside the jacket during vulcanization. The suction is performed by a normal vacuum pump or the like and is not shown here.

As described above, the elastic tubular body 33 closes the inlet 41 by the operation of the mouth opening / closing mechanism 42, and the outlet 4
3 is expanded by sucking and vacuuming the gas in the space 34, and the air inlet 41 is opened to release the vacuum, thereby approaching the outer peripheral surface of the unvulcanized belt sleeve 30 and opening it. When a pressure medium such as high-pressure steam is introduced from the air inlet 41, the elastic tubular body 33 is brought into pressure contact with the unvulcanized belt sleeve 30.

The process of vulcanizing the unvulcanized belt sleeve by 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 base 24 in the vulcanization can 20. At this time, both the inlet 41 and the outlet 43 are open.

Next, the air inlet 41 is closed by the flange 44 of the mouth opening / closing mechanism 42 provided in the vulcanization 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 43, and then the vacuum is drawn. 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 increases, and the molding mold 28 with the unvulcanized belt sleeve 30 mounted thereon can be easily inserted into the jacket 29. (Shown in FIG. 5)

When the vacuum is released and the rod 45 of the mouth opening / closing mechanism 42 is moved to open the air inlet 41, the elastic tubular body 33 is provided along the outer peripheral surface of the unvulcanized belt sleeve 30. Restore state. (Shown in FIG. 6)

After that, when the upper lid 25 of the vulcanization can 20 is installed in the jacket 29, external pressure steam is introduced into the vulcanization can 29 and internal pressure steam is introduced into the molding mold 28 to perform vulcanization. At this time, the air inlet 4 is inserted into the space 34 of the jacket.
The external pressure steam is introduced from the first, and the unvulcanized belt sleeve 30
Is pressed by the elastic tubular body 33. At the same time, water is discharged from the suction pipe 49. Also, elastic skirt 3
Since 5 expands and presses the tip of the unvulcanized belt sleeve 30, the belt sleeve 30 is surely vulcanized over the entire area. (Shown in FIG. 7)

When vulcanization is completed and the molding mold 28 is taken out of the vulcanization 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, the elastic cylindrical body 33 can be brought into close contact with the cylindrical case 32 to substantially increase the inner diameter of the jacket 29. , Molding mold 2
It can be seen that it is easy to install and remove 8 on the support base 24. Moreover, the jacket 29 can be used even if the outer peripheral length of the belt to be molded is slightly changed, and both ends of the unvulcanized belt sleeve 30 are surely vulcanized by the expansion of the elastic skirts 35 to generate rubber scrap. Also disappears.

The belt vulcanizing apparatus of the present invention can vulcanize a belt sleeve such as a multi-ribbed belt, a low edge belt, a toothed belt, or a plurality of wrapped belts.

[0034]

As described above, in the belt vulcanizing apparatus of the present invention, the elastic cylindrical bodies are fitted in the inside of the cylindrical case as a jacket to be installed in the vulcanizing can with a gap. , If the gas in the space formed between these members is sucked to expand the elastic cylindrical body to substantially increase the inner diameter of the jacket, the molding mold can be smoothly taken in and out. . Moreover, this jacket can be applied even when vulcanizing unvulcanized belt sleeves having different circumferences.

Further, in the belt vulcanizing apparatus, since the elastic skirts provided on the elastic tubular body are mounted on the upper and lower frames, and one upper frame is mounted on the cylindrical case via the spring, the elastic skirt is elastic. The skirt is always pressed against the upper lid with a constant repulsive force for efficient sealing, and there is no swelling of the unvulcanized belt sleeve, and the vulcanization can be carried out uniformly without deterioration of the core wire. is there. Then, both ends of the unvulcanized belt sleeve are pressed against each other by the expansion of the elastic skirt to be surely vulcanized, and the generation of rubber scrap is eliminated.

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 held by the upper and lower frames,
Even if the elastic skirt deteriorates due to heat, the dimensional change of the jacket does not change in the longitudinal direction, and the dimensional stability is high. The elastic skirt is stably positioned on the support base of the vulcanizer and has a long life.

If the cylindrical case of the jacket is equipped with a grip, it is possible to easily install it on the support of the vulcanization can or take it out by using a means such as a robot.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a belt vulcanizing apparatus according to the present invention.

FIG. 2 is a vertical sectional view of a jacket used in the belt vulcanizing apparatus of the present invention.

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

FIG. 4 is a vulcanization process of an unvulcanized belt sleeve when the jacket of the present invention is used, showing a case where the jacket is installed on a support base of a vulcanization can.

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

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

FIG. 7 is a step subsequent to the step shown in FIG. 6, showing a case where the unvulcanized belt sleeve is vulcanized.

FIG. 8 is a vertical sectional view of a conventional belt vulcanizing apparatus.

[Explanation of symbols]

 20 Belt Vulcanizing Device 25 Upper Lid 28 Molding Mold 29 Jacket 30 Unvulcanized Belt Sleeve 32 Cylindrical Case 33 Elastic Cylindrical Body 34 Space 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

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B29L 29:00 (56) References Japanese Patent Publication No. 2-32968 (JP, B2)

Claims (4)

[Claims] 1. A mold assembly in which a non-vulcanized belt sleeve or belt is mounted on the outer peripheral surface of a molding mold and a cylindrical jacket is concentrically fitted on the outer peripheral surface thereof in a vulcanizing can. Between the installed support and the top cover
In the existing belt vulcanizing device, an elastic tubular body is fitted inside the cylindrical case as the jacket to form a space portion that maintains airtightness between the case and the elastic tubular body,
At least one inlet and outlet are provided in the cylindrical case so as to communicate with the space, and these inlet and outlet are provided in a mouth opening / closing mechanism and a suction pipe provided in a vulcanizing can, respectively. Belt vulcanizer characterized by being connectable. 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 the operation of the cylinder. 3. An unvulcanized belt sleeve or a jacket used in a device for vulcanizing a belt, wherein an elastic tubular body is fitted inside a cylindrical case and a space is provided between the case and the elastic tubular body. And at least one inlet and outlet are provided in the cylindrical case so as to communicate with the space, and further expand outward at the upper and lower edges of the elastic tubular body.
A circle that forms an elastic skirt that provides airtightness
Attach it to the upper and lower tubular frames and place one frame in the cylindrical case.
Attached to the base via an elastic member, and the other frame
A jacket used for a belt vulcanizing device, which is fixed to a cylindrical case . 4. A cylindrical case having a gripping part attached thereto.
A jacket used in the belt vulcanizing apparatus according to item 3.