JP2010274500A - Belt sleeve vulcanizer and method of vulcanizing belt sleeve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt sleeve vulcanizer which can preheat a rubber jacket by a simple construction and a method of vulcanizing the belt sleeve. <P>SOLUTION: The belt sleeve vulcanizer 1 includes a mold 2 around which an unvulcanized belt sleeve 20 is wound, the rubber jacket 4 arranged outside of the mold 2, a cylindrical casing 5 arranged outside of the rubber jacket 4, a pressure medium supply part 8 and a decompression part 9. The cylindrical casing 5 includes a heating part 7 for heating the rubber jacket 4, arranged on the inner circumferential surface of the casing 5. The pressure medium supply part 8 is connected with a space 6 between the rubber jacket 4 and the cylindrical casing 5 and operates to press the rubber jacket 4 to the belt sleeve 20 by introducing a pressure medium into the space 6. The decompression part 9 is connected with the space 6 and operates to bring the rubber jacket 4 into contact with the heating part 7 by decompressing the space 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a belt sleeve vulcanizing apparatus and a belt sleeve vulcanizing method in which a rubber jacket is pressed against an outer peripheral surface of a belt sleeve wound around a mold to vulcanize the belt sleeve.

  2. Description of the Related Art Conventionally, as a belt sleeve vulcanizing apparatus, a rubber having a mold around which an unvulcanized belt sleeve is wound and a rubber jacket disposed on the outside of the mold, and rubber by a pressure medium such as heated compressed air is used. A belt sleeve vulcanizing device is known in which a jacket is pressed against a belt sleeve and the belt sleeve is heated and pressurized to vulcanize.

  An example of such a belt sleeve vulcanizing apparatus is described in Patent Document 1. The belt sleeve vulcanizing apparatus of Patent Document 1 has a structure in which a cylindrical casing is disposed on the outer periphery of a rubber jacket as described above, and both ends of the rubber jacket are attached to the casing. A pressure medium space in which compressed air is enclosed is formed between the casing and the casing. Furthermore, this casing has a heating medium space part into which a heat medium such as steam or silicon oil is introduced, and the pressure medium in the pressure medium space part is heated by the heat medium introduced into the heating medium space part. It is like that.

  When the belt sleeve is vulcanized by the belt sleeve vulcanizing apparatus of Patent Document 1, the compressed air is introduced into the pressure medium space, and the compressed air is heated by the heat medium in the heating medium space, thereby increasing the temperature. The rubber jacket is deformed in the diameter-reducing direction, pressed against the belt sleeve, and heated and pressurized.

Japanese Patent No. 3875796

  By the way, in the belt sleeve vulcanizing apparatus that presses the rubber jacket against the belt sleeve and heats and pressurizes the belt sleeve as described above, the vulcanization process as described above is started while the rubber jacket is at room temperature. However, in this case, since it takes time for the rubber jacket to reach the vulcanization temperature of the belt sleeve, from the viewpoint of shortening the process time, the rubber jacket should be heated to a certain temperature or more before starting the vulcanization process. Is preferred.

  In order to preheat the rubber jacket, for example, a method in which the rubber jacket removed from the vulcanizer is heated by a heating device such as an oven and then transferred to the vulcanizer, or a heating device is disposed in the vulcanizer. Then, a method of heating the rubber jacket can be considered. However, it is disadvantageous in apparatus cost to provide such a heating device dedicated to preheating the rubber jacket.

  Further, when the rubber jacket removed from the vulcanizing apparatus is heated by a heating device such as an oven and then installed in the vulcanizing device, a troublesome work of detaching the rubber jacket from the vulcanizing device and the heating device is required. Furthermore, it is difficult to install large heating devices such as ovens in the immediate vicinity of the vulcanizing device from the standpoint of installation space, and since they are installed away from the vulcanizing device, the heated rubber jacket is vulcanized. Thermal loss occurs when transporting to the device.

  Accordingly, an object of the present invention is to provide a belt sleeve vulcanizing apparatus and a belt sleeve vulcanizing method capable of simply preheating a rubber jacket without adding a special configuration.

Means for Solving the Problems and Effects of the Invention

  A belt sleeve vulcanizing device according to a first aspect of the present invention includes a mold around which an unvulcanized belt sleeve is wound, a rubber jacket disposed outside the mold, and an outer periphery of the rubber jacket. A cylindrical casing provided with a heating portion for heating the rubber jacket on a surface; and a space between the rubber jacket and the cylindrical casing; a pressure medium is introduced into the space; And a pressure medium supply unit that presses against the belt sleeve, and a pressure reducing unit that is connected to the space and depressurizes the space to bring the rubber jacket into contact with the heating unit.

  When the unvulcanized belt sleeve is vulcanized by the belt sleeve vulcanizing apparatus of the present invention, first, the space between the rubber jacket and the cylindrical casing is decompressed by the decompression unit, and the rubber jacket is tubular. The rubber jacket is heated in advance in close contact with the heating part of the casing. Thereafter, the pressure medium is introduced into the space by the pressure medium supply unit, and at the same time, the rubber sleeve is pressed against the belt sleeve while the pressure medium in the space is heated by the heating unit, and the belt sleeve is heated and pressurized to be vulcanized. .

  Since the rubber jacket is preheated by using a heating portion that is originally provided for vulcanization of the belt sleeve, the rubber jacket can be preheated without adding a special configuration. In addition, since the preheating is performed by bringing the rubber jacket into close contact with the heating portion provided in the cylindrical casing, it is not necessary to remove the rubber jacket for preheating, and the preheating can be easily performed. Further, the rubber jacket can be brought into close contact with the heating unit by a simple method in which the space between the rubber jacket and the cylindrical casing is decompressed by the decompression unit.

  The belt sleeve vulcanizing apparatus according to the second invention is characterized in that, in the first invention, a plurality of grooves are formed on the outer peripheral surface of the mold.

  According to this configuration, when the preheated rubber jacket is pressed against the belt sleeve and the belt sleeve is heated and pressurized, the rubber constituting the belt sleeve becomes fluidized by heat and is pushed into the groove portion of the mold, so that the belt sleeve A convex shape corresponding to the groove portion is formed on the inner peripheral surface of the.

  When the rubber jacket is not preheated, the rubber may be pushed into the groove portion in a state where the fluidization of the rubber constituting the belt sleeve is insufficient, and the rubber may not flow completely into the groove portion. On the other hand, in the present invention, since the preheated rubber jacket is pressed against the belt sleeve, the rubber constituting the belt sleeve can be fluidized in a short time. Therefore, molding can be performed reliably.

  A belt sleeve vulcanizing method according to a third aspect of the present invention includes a mold around which an unvulcanized belt sleeve is wound, a rubber jacket disposed outside the mold, an outer circumference of the rubber jacket, The belt sleeve is vulcanized by a vulcanizing apparatus having a cylindrical casing provided with a heating section for heating the rubber jacket on a surface, the rubber jacket being brought into contact with the heating section. After the rubber jacket preheating step for heating the rubber jacket, and after the rubber jacket preheating step, a pressure medium is introduced into a space between the rubber jacket and the cylindrical casing, and the pressure medium in the space is converted into the heating unit. The rubber jacket is pressed against the belt sleeve by the pressure medium while being heated by the pressure medium, and the belt sleeve is heated and pressurized to vulcanize. Characterized by a step.

  According to the belt sleeve vulcanization method of the present invention, first, the rubber jacket is heated in advance by bringing the rubber jacket into close contact with the heating portion of the cylindrical casing. Thereafter, a pressure medium is introduced into the space between the rubber jacket and the cylindrical casing, and at the same time, the pressure medium in the space is pressed against the belt sleeve while the pressure medium in the space is heated by the heating unit. The belt sleeve is heated and pressurized to vulcanize.

  Since the rubber jacket is preheated by using a heating portion that is originally provided for vulcanization of the belt sleeve, the rubber jacket can be preheated without adding a special configuration. In addition, since the preheating is performed by bringing the rubber jacket into close contact with the heating portion provided in the cylindrical casing, it is not necessary to remove the rubber jacket for preheating, and the preheating can be easily performed.

  The belt sleeve vulcanizing method of the fourth invention is characterized in that, in the rubber jacket preheating step of the third invention, the space is decompressed and the rubber jacket is brought into contact with the heating portion.

  According to this configuration, the rubber jacket can be brought into close contact with the heating unit by a simple method of reducing the pressure between the rubber jacket and the cylindrical casing.

  The belt sleeve vulcanizing method according to a fifth aspect of the present invention is the method according to the third or fourth aspect, wherein a plurality of grooves are formed on the outer peripheral surface of the mold. Simultaneously with vulcanization, the inner peripheral surface of the belt sleeve is formed by the groove.

  According to this configuration, when the rubber jacket is pressed against the belt sleeve and the belt sleeve is heated and pressurized, the rubber constituting the belt sleeve becomes fluidized by heat and is pushed into the groove portion of the mold, so that the inner circumference of the belt sleeve is increased. A convex shape corresponding to the groove is formed on the surface.

  When the rubber jacket is not preheated, the rubber may be pushed into the groove portion in a state where the fluidization of the rubber constituting the belt sleeve is insufficient, and the rubber may not flow completely into the groove portion. On the other hand, in the present invention, since the preheated rubber jacket is pressed against the belt sleeve, the rubber constituting the belt sleeve can be fluidized in a short time. Therefore, molding can be performed reliably.

1 is a longitudinal sectional view of a belt sleeve vulcanizing apparatus according to an embodiment of the present invention. It is a cross-sectional view showing a state in which an unvulcanized belt sleeve is wound around a mold. It is a longitudinal cross-sectional view which shows the state which made the rubber jacket contact | adhere to the heating part. It is a fragmentary perspective view of a V belt with a cog. It is a longitudinal cross-sectional view of the belt sleeve vulcanization | cure apparatus of a change form.

  Embodiments of the present invention will be described below. In the present embodiment, an example in which the present invention is applied when an unvulcanized belt sleeve is vulcanized in the manufacturing process of the cogged V-belt will be described.

  As shown in FIG. 1, a belt sleeve vulcanizing apparatus 1 according to this embodiment includes a cylindrical mold 2 around which an unvulcanized belt sleeve 20 is wound, a mold support member 3 that supports the mold 2, and a mold. A rubber jacket 4 arranged outside the mold 2, a cylindrical casing 5 arranged outside the rubber jacket 4, a pressure pump (pressure medium supply unit) 8, and a vacuum pump (pressure reduction unit) 9 Have In the following description of the belt sleeve vulcanizing apparatus 1, the vertical direction in FIG. 1 is defined as the vertical direction.

  As shown in FIG. 2, the unvulcanized belt sleeve 20 vulcanized by the belt sleeve vulcanizing device 1 has a canvas 21, unvulcanized rubber sheets 22, 23 on the outer peripheral surface of the mold 2, A core wire 24, an unvulcanized rubber sheet 25, and a canvas 26 are wound around in order. Further, the vulcanized belt sleeve 20 is cut into a V shape with a predetermined width and finished into a plurality of cogged V belts 30. As shown in FIG. 4, the cogged V-belt 30 includes a canvas 21, a compressed rubber layer 31, an adhesive rubber layer 32 in which a core wire 24 is embedded along the longitudinal direction of the belt, a stretched rubber layer 33, and a canvas. 26 are stacked in order from the inner peripheral side. The compressed rubber layer 31 is formed with a plurality of cog portions 31a arranged at regular intervals in the belt longitudinal direction.

  As shown in FIG. 2, a plurality of groove portions 2 a extending in the cylinder axis direction are formed on the outer peripheral surface of the mold 2 at predetermined intervals in the circumferential direction. As shown in FIG. 1, the mold 2 is formed in a cylindrical shape with both ends closed, and has a space 2b (hereinafter referred to as a heat medium accommodating portion 2b) inside. A cylindrical introduction portion 2 c protrudes from the upper end surface of the mold 2, and a cylindrical discharge portion 2 d protrudes from the lower end surface of the mold 2. The heat medium accommodating portion 2b communicates with the outside through the introduction portion 2c and the discharge portion 2d.

  The introduction part 2c and the discharge part 2d are respectively connected to a steam generator (not shown). The steam generator is configured to send steam to the heat medium accommodating part 2b through the introduction part 2c, and to take in and circulate the steam discharged from the discharge part 2d.

  The mold support member 3 is a plate-like member and supports the lower surface of the mold 2. A through hole 3a is formed in a substantially central portion of the mold support member 3, and a discharge hole 5b of the mold 2 is inserted into the through hole 3a.

  The rubber jacket 4 is cylindrical and is disposed so as to surround the outer periphery of the mold 2. The rubber jacket 4 is made of an elastic material such as rubber or urethane, and can be expanded and contracted. Further, the rubber jacket 4 has a diameter in the central portion in the cylinder axis direction larger than the diameter of the outer peripheral surface of the belt sleeve 20 wound around the mold 2 in an unloaded state where no external force is applied, and It is smaller than the diameter of the inner peripheral surface of a cylindrical casing 5 to be described later. Further, the diameters of the upper and lower ends of the rubber jacket 4 may be the same as the diameter of the central part, but are larger than the diameter of the central part and not more than the diameter of the inner peripheral surface of the cylindrical casing 5. Also good.

  A cylindrical casing 5 is disposed on the outer periphery of the rubber jacket 4. A space 6 between the rubber jacket 4 and the cylindrical casing 5 (hereinafter referred to as a pressure medium space portion 6) is sealed by fixing the upper and lower ends of the rubber jacket 4 to the inner peripheral surface of the cylindrical casing 5, respectively. It has been stopped.

  Further, the cylindrical casing 5 is formed with two introduction holes 5a and two discharge holes 5b that communicate the pressure medium space 6 with the outside. The two introduction holes 5 a are formed at symmetrical positions in the lower part of the cylindrical casing 5. The two discharge holes 5b are respectively formed at positions above the two introduction holes 5a of the cylindrical casing 5.

  The cylindrical casing 5 includes a cylindrical heating unit 7 in a region between the introduction hole 5a and the discharge hole 5b. The heating unit 7 is in contact with the rubber jacket 4 during the vulcanization process, which will be described later, and with the heating means for indirectly heating the rubber jacket 4 through the compressed air in the pressure medium space 6, and during the rubber jacket preheating process, which will be described later. It also serves as a heating means for heating. The heating unit 7 constitutes a part of the inner peripheral surface of the cylindrical casing 5. An annular heat medium accommodating portion 7 a into which steam is introduced is formed inside the heating portion 7. The heat medium accommodating portion 7a is connected to a steam generator (not shown) through a communication hole (not shown).

  The pressure pump (pressure medium supply unit) 8 is connected to the two introduction holes 5a on the outlet side (delivery side) so that the compressed air is introduced into the pressure medium space 6 via the two introduction holes 5a. It has become. The inlet side of the pressure pump 8 communicates with the two discharge holes 5b and the atmosphere, and the pressure pump 8 takes in a small amount of air discharged from the discharge holes 5b and circulates it. .

  The vacuum pump (decompression unit) 9 is connected to the two discharge holes 5b. The vacuum pump 9 sucks air in the pressure medium space part 6 through the two discharge holes 5b to depressurize the pressure medium space part 6.

  Next, a method for vulcanizing the unvulcanized belt sleeve 20 using the belt sleeve vulcanizing apparatus 1 will be described.

(Unvulcanized belt sleeve winding process)
An unvulcanized belt sleeve 20 is wound around the outer peripheral surface of the mold 2. Specifically, as shown in FIG. 2, while the canvas 21 is molded using a pinion roll or the like along the groove portion 2 a of the mold 2, the canvas 21 is wound around the mold 2, and then the upper portion of the canvas 21 is not yet formed thereon. Vulcanized rubber sheets 22 and 23 are wound in order. Further, after the core wire 24 is spirally wound thereon, the unvulcanized rubber sheet 25 and the canvas 26 are wound in order. The canvas 21 may be wound around the mold 2 without performing molding.

  The mold 2 around which the unvulcanized belt sleeve 20 is wound is inserted into the rubber jacket 4, the discharge part 2 d is inserted into the through hole 3 a, and the mold 2 is placed on the mold support member 3. .

(Rubber jacket preheating process)
As shown in FIG. 3, the pressure medium space 6 is depressurized by the vacuum pump 9 in a state where the steam is introduced into the heat medium accommodating part 7a of the heating part 7, and the rubber jacket 4 is deformed in the diameter increasing direction. The rubber jacket 4 is heated by being in close contact with the heating unit 7. The heating temperature of the rubber jacket 4 may be substantially the same temperature (for example, 150 to 160 ° C.) as the temperature of the rubber jacket 4 during the vulcanization process described later, and is lower than the temperature during the vulcanization process. Also good. Although depending on the ease of elastic deformation of the belt sleeve 20, the degree of vacuum of the pressure medium space 6 when the rubber jacket 4 is in close contact with the heating unit 7 is, for example, 50 to 100 kPa.

(Vulcanization process)
Next, steam is introduced into the heat medium accommodating portion 2 b of the mold 2 to heat the mold 2. Thereby, the belt sleeve 20 is heated from the inner peripheral side. At this time, since the steam in the heat medium accommodating part 2b is discharged from the discharge part 2d and circulates, the steam can always be introduced from the introduction part 2c, and the temperature of the mold 2 can be kept substantially constant. it can.

  After starting the heating of the mold 2, for example, 1 to 5 MPa of compressed air is introduced into the pressure medium space 6 between the rubber jacket 4 and the cylindrical casing 5 by the pressurizing pump 8. At the same time, the compressed air in the pressure medium space 6 is heated by the heating unit 7. Then, the rubber jacket 4 is deformed in the diameter-reducing direction by the compressed air in the pressure medium space 6 and presses the belt sleeve 20, so that the belt sleeve 20 is heated and pressurized and vulcanized. The heating and pressing time is, for example, 20 to 100 minutes, and the heating temperature of the belt sleeve 20 is, for example, 150 to 160 ° C., although it depends on the type of rubber material.

  At this time, since the air in the pressure medium space 6 is discharged little by little from the discharge hole 5b, the compressed air can always be introduced from the introduction hole 5a. Therefore, the pressure in the pressure medium space 6 can be made uniform and the pressure can be kept substantially constant.

  Further, during this heating and pressurization, the rubber constituting the rubber sheet 22 becomes fluidized by heat and is pushed into the groove 2 a of the mold 2. As a result, a plurality of cog portions 31 a corresponding to the plurality of groove portions 2 a are formed on the inner peripheral surface of the belt sleeve 20. In addition, when the canvas 21 is wound around the mold 2 without performing molding in the unvulcanized belt sleeve winding process, the fluidized rubber spreads in the groove 2a of the mold 2 while spreading the canvas 21. The cog portion 31a is formed by being pushed in.

  After vulcanization, the air in the pressure medium space 6 is discharged from the discharge hole 5b, and then the mold 2 around which the belt sleeve 20 is wound is taken out. Thereafter, the belt sleeve 20 is cooled, and then the belt sleeve 20 is removed from the mold 2. The belt sleeve 20 after vulcanization is cut into a V shape with a predetermined width and finished into a plurality of cogged V belts 30.

  As described above, since the rubber jacket 4 is preheated before the vulcanization process, the temperature of the belt sleeve 20 can be raised to a desired temperature in a short time during the vulcanization process. Time can be shortened. Moreover, since the preheating is performed by bringing the rubber jacket 4 into direct contact with the heating unit 7, the time for the preheating process is short.

  In addition, since the rubber jacket 4 is preheated using the heating unit 7 that is originally used when the belt sleeve 20 is vulcanized, the rubber jacket 4 can be preheated without adding a special configuration.

  Further, since the rubber jacket 4 is brought into close contact with the heating portion 7 provided in the cylindrical casing 5 and preheating is performed, it is not necessary to remove the rubber jacket 4 for preheating, and the preheating can be easily performed. . Therefore, automation from a preheating process to a vulcanization process becomes easy. Further, since it is not necessary to move the rubber jacket 4 during preheating, no thermal loss is caused by the movement.

  Further, the rubber jacket 4 can be brought into close contact with the heating unit 7 by a simple method in which the pressure medium space 6 between the rubber jacket 4 and the cylindrical casing 5 is decompressed by the vacuum pump 9.

  If the rubber jacket 4 is not preheated, the rubber may be pushed into the groove 2a with insufficient fluidization of the rubber constituting the belt sleeve 20, and the rubber may not flow completely into the groove 2a. On the other hand, in this embodiment, since the preheated rubber jacket 4 is pressed against the belt sleeve 20, the rubber constituting the belt sleeve 20 can be fluidized in a short time. Therefore, the cog portion 31a can be reliably molded.

  The preferred embodiment of the present invention has been described above, but the above embodiment can be modified as follows. In addition, about the thing which has the structure similar to the said embodiment, the description is abbreviate | omitted suitably using the same code | symbol.

1] In the above embodiment, as an example of use of the belt sleeve vulcanizing device 1, the case where the uncured belt sleeve 20 is vulcanized and the cog portion 31 a is formed at the same time has been described. The usage example is not limited to this. For example, the belt sleeve vulcanizing device 1 may be used when the cog portion 31a is formed without vulcanization (this process is referred to as a pre-molding process) and then the belt sleeve 20 is vulcanized.

  Specifically, first, the canvas 21 and the unvulcanized rubber sheet 22 are wound around the outer peripheral surface of the mold 2 in this order, and the mold 2 is inserted into the rubber jacket 4. Next, the rubber jacket 4 is preheated in the same procedure as the rubber jacket preheating step of the above embodiment. The heating temperature of the rubber jacket 4 at this time may be substantially the same temperature (for example, 100 to 150 ° C.) as the temperature of the rubber jacket 4 in the preforming process described later, and is a temperature lower than the temperature in the preforming process. It may be.

  Thereafter, the rubber sheet 22 is heated and pressurized to form the cog portion 31a in the same procedure as the vulcanization step of the above embodiment (preliminary molding step). Thereby, the preforming body which consists of the canvas 21 and the rubber sheet 22 in which the cog part 31a was formed is formed. The heating temperature of the rubber sheet 22 at this time is a temperature at which vulcanization does not proceed and depends on the type of rubber material, but is, for example, 100 to 150 ° C., and the heating time is, for example, 10 to 15 minutes. It is.

  Next, the compressed air in the pressure medium space portion 6 is discharged, the mold 2 is once taken out, and an unvulcanized rubber sheet 23 is formed on the outer peripheral surface of the preformed rubber sheet 22 wound around the mold 2. Then, the core wire 24 and the unvulcanized rubber sheet 25 are wound in order to form the unvulcanized belt sleeve 20. The mold 2 around which the belt sleeve 20 is wound is inserted into the rubber jacket 4 and vulcanized by heating and pressurizing the belt sleeve 20 in the same procedure as the vulcanization process of the above embodiment (vulcanization process). ). The heating temperature of the belt sleeve 20 at this time is, for example, 150 to 160 ° C., and the heating time is, for example, 20 to 30 minutes. In addition, before vulcanizing the belt sleeve 20, the rubber jacket 4 may be preheated in the same procedure as the rubber jacket preheating step described above, but it may not be preheated.

  According to this modification, since the rubber jacket 4 is preheated before the cog 31a is pre-formed, the cog 31a can be formed in a short time during the pre-forming. Further, since the rubber sheet 22 is heated at a temperature lower than that at the time of vulcanization at the time of preforming, fluidization tends to be insufficient when the rubber jacket 4 is not preheated, and the rubber is completely in the groove portion 2a. The situation that does not flow into the is likely to occur. On the other hand, in this modified embodiment, since the rubber jacket 4 is preheated before the preforming, the rubber can be fluidized in a short time, and the cog portion 31a can be reliably molded.

2] In the above embodiment, the unvulcanized belt sleeve 20 has a structure in which the unvulcanized rubber sheets 22 and 23, the core wire 24, and the unvulcanized rubber sheet 25 are laminated. The configuration of the unvulcanized belt sleeve 20 to be vulcanized by the sleeve vulcanizing device 1 is not limited to this. For example, the unvulcanized belt sleeve 20 may be formed by winding only the core wire and the unvulcanized rubber sheet around the outer peripheral surface of the mold 2 in order.

3] Although the rubber jacket 4 is directly attached to the cylindrical casing 5 in the above embodiment, a space (pressure medium space) in which compressed air can be enclosed is provided between the rubber jacket 4 and the cylindrical casing 5. The rubber jacket 4 does not necessarily have to be directly attached to the cylindrical casing 5 as long as it has a configuration. For example, as shown in FIG. 5, the rubber jacket 4 may be attached to an annular plate 101 whose lower end is attached to the mold support member 3 and whose upper end is placed on the upper end of the cylindrical casing 5.

4] The vacuum pump 9 may be connected to the introduction hole 5a. In this case, the discharge hole 5 b is connected only to the inlet side of the pressurizing pump 8.

5] In the above embodiment, the vacuum pump 9 is used as the decompression unit of the present invention for decompressing the pressure medium space 6, but the decompression unit is not limited to this, and decompression means other than the vacuum pump 9 is used. May be used.

6] In the above embodiment, the rubber jacket 4 is heated by bringing the rubber jacket 4 into close contact with the heating portion 7 by reducing the pressure medium space portion 6 by the vacuum pump 9, but the rubber jacket 4 is heated by the heating portion 7. 7 is not limited to the vacuum pump (decompression unit) 9. For example, the rubber jacket 4 may be in close contact with the heating unit 7 and heated by inserting a cylindrical member capable of expanding the diameter into the rubber jacket 4 and expanding the diameter.

7] In the above embodiment, the pressure pump 8 is used as the pressure medium supply unit of the present invention for introducing the compressed air into the pressure medium space 6, but the pressure medium supply unit is not limited to this. For example, a compressor may be used.

8] Further, the pressure medium introduced into the pressure medium space 6 is not limited to compressed air, and for example, a liquid such as silicon oil may be used.

9] The heat medium accommodated in the heat medium accommodating part 7a of the heating part 7 and the heat medium accommodating part 2b of the mold 2 is not limited to steam, and may be, for example, silicon oil.

10] In the above embodiment, the heating unit 7 is configured to include the heat medium storage unit 7a that stores the heat medium therein, but the configuration of the heating unit 7 is not limited thereto, and the heating unit 7 The type of the heat source is not particularly limited as long as it has a side wall portion constituting a part of the inner peripheral surface of the cylindrical casing 5 and a heat source for heating the side wall portion. For example, a heating wire may be used as the heat source.

  As described above, the embodiment and the modification of the present invention have been described with reference to the example in which the present invention is applied when the unvulcanized belt sleeve 20 is vulcanized in the manufacturing process of the cogged V-belt. However, the present invention is not limited to this, and the present invention can also be applied when vulcanizing an unvulcanized belt sleeve in the production process of a flat belt, a V-belt, a toothed belt, a V-ribbed belt, or the like. . In the case of manufacturing a flat belt, the mold 2 having a flat outer peripheral surface is used. When manufacturing a V-belt or a V-ribbed belt, a mold 2 having a flat outer peripheral surface or one having a plurality of grooves extending in the circumferential direction on the outer peripheral surface is used.

DESCRIPTION OF SYMBOLS 1 Belt sleeve vulcanizer 2 Mold 2a Groove part 4 Rubber jacket 5 Cylindrical casing 5a Introduction hole 5b Discharge hole 6 Pressure medium space part (space)
7 Heating part 7a Heat medium accommodating part 8 Pressure pump (pressure medium supply part)
9 Vacuum pump (decompression unit)
20 Belt sleeve

Claims (5)

A mold around which an unvulcanized belt sleeve is wound;
A rubber jacket disposed outside the mold;
A cylindrical casing disposed outside the rubber jacket and provided with a heating portion for heating the rubber jacket on an inner peripheral surface thereof;
A pressure medium supply unit that is connected to a space between the rubber jacket and the cylindrical casing, introduces a pressure medium into the space, and presses the rubber jacket against the belt sleeve;
A decompression unit connected to the space, depressurizing the space, and bringing the rubber jacket into contact with the heating unit;
A belt sleeve vulcanizing apparatus comprising:   The belt sleeve vulcanizing apparatus according to claim 1, wherein a plurality of grooves are formed on an outer peripheral surface of the mold. A mold around which an unvulcanized belt sleeve is wound, a rubber jacket disposed on the outside of the mold, and a heating unit disposed on the outside of the rubber jacket for heating the rubber jacket on an inner peripheral surface A method of vulcanizing the belt sleeve by a vulcanizing device having a provided cylindrical casing,
A rubber jacket preheating step of heating the rubber jacket by bringing the rubber jacket into contact with the heating unit;
After the rubber jacket preheating step, a pressure medium is introduced into a space between the rubber jacket and the cylindrical casing, and the pressure medium in the rubber jacket is heated by the pressure medium while the pressure medium is heated by the heating unit. A vulcanizing step of pressing the belt sleeve against the belt sleeve to heat and pressurize the belt sleeve to vulcanize the belt sleeve. In the rubber jacket preheating process,
4. The belt sleeve vulcanizing method according to claim 3, wherein the space is decompressed and the rubber jacket is brought into contact with the heating portion. A plurality of grooves are formed on the outer peripheral surface of the mold,
5. The belt sleeve vulcanizing method according to claim 3, wherein in the vulcanizing step, an inner peripheral surface of the belt sleeve is formed by the groove portion simultaneously with vulcanization of the belt sleeve.

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