JP3550121B2 - Belt vulcanizing equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pressurized硫装location of the rubber belt, details, deaeration failure without during vulcanization, to a technique to be able to create a superior rubber belt quality.
[0002]
[Prior art]
An outline of a conventional vulcanizing device for an unvulcanized rubber belt and an unvulcanized belt molded body used for the vulcanizing device are as follows. That is, as shown in FIG. 7, the belt vulcanizing apparatus A includes a supporting assembly table 1 for erecting a cylindrical mold 2 on which an unvulcanized rubber belt molded body 5 described below is externally mounted, and a cylindrical vulcanizing apparatus A. In order to cover and close the upper side of the mold 2, a flange 3 placed on the cylindrical mold 2, an upper lid 4 provided above the flange 3, and an exterior It comprises a cylindrical rubber-made jacket 6 which is externally provided on the molded unvulcanized belt 5 and a vulcanized can 7 in which these are hermetically sealed.
[0003]
An upper inlet 8 for passing high-pressure steam into the vulcanizer 7 and a lower outlet 9 are provided on the vulcanizer 7, and an inlet pipe for passing low-pressure steam into the mold 2. A bottom member 12 provided with a discharge pipe 11 and a discharge pipe 11 is disposed below the mold 2 on the lower surface side of the supporting assembly table 1. High-pressure steam from a high-pressure steam supply source (not shown) is supplied to the vulcanizer 7 using an inlet 8 and an outlet 9, and low-pressure steam from a low-pressure steam supply source (not shown) is supplied to an introduction pipe 10 and a discharge pipe. 11 so as to be freely supplied into the mold 2.
[0004]
The unvulcanized belt molded body 5 is formed by sequentially winding the respective rubber belt components of the inner belt sleeve 5a, the core wire 5b as the reinforcing material, and the outer belt sleeve 5c on the outer peripheral surface of the mold 2 as a molding die. It is formed by doing. In the vulcanization step, a jacket 6 made of a flexible material such as a rubber material is extrapolated around the outer periphery of the unvulcanized belt molded body 5 having the mold 2 and then put into a vulcanizing can 7 in that state. That is, the mold assembly in which the mold 2, the unvulcanized belt molded body 5, and the jacket 6 are integrated is attached to the support assembly table 1 with the flange 3 provided at one end thereof facing upward. The vulcanizing apparatus A is installed upright so as to cover the introduction section 13.
[0005]
Thereafter, the upper lid 4 is closed to surround the flange 3, the supporting assembly table 1, the mold 2, and the jacket 6 so as to be pressed and clamped, so that the steam in the vulcanizing can 7 is pressed onto the unvulcanized belt molded body 5. Sealed to prevent direct contact. Then, the unvulcanized belt molded body 5 is vulcanized while being tightened by the jacket 6 by pressurizing and heating by injecting high-pressure steam outside the jacket 6 and low-pressure steam inside the mold 2 respectively. A vulcanization step is performed. As such a technique, for example, a technique disclosed in Japanese Patent Application Laid-Open No. 7-314453 is known.
[0006]
[Problems to be solved by the invention]
In a conventional vulcanizing method using a vulcanizing apparatus, a vulcanizing treatment is performed by heating while applying pressure by a difference in vapor pressure acting on the inside and outside of an unvulcanized belt molded body. However, in this method, the air existing in the unvulcanized belt molded body, the air existing in the gap between the unvulcanized belt molded body and the rubber jacket fitted to the outer peripheral surface, and the rubber generated during the vulcanization. In some cases, the gas components that are generated cannot be completely trapped during vulcanization.
[0007]
In other words, the high-pressure steam injected into the outside of the jacket causes the upper and lower ends of the jacket to be in a state where the neck is tightened, the outer diameters of both end surfaces are reduced, and the internal air and gas components are confined. As a result, there is a disadvantage that a defective belt having bubbles therein is generated. In addition, when the jacket is pushed to the mold side, the space between the jacket, the mold, the upper lid, and the support base is substantially in a sealed state, and the above-described inconvenience is liable to be caused even when the air or the like cannot be sufficiently removed. . In particular, there is a problem that air bubbles concentrate around the core wire inside the belt, resulting in poor porous or poor adhesion between the core wire and rubber.
[0008]
An object of the present invention is to prevent the above-described porous defect caused by insufficient deaeration of the unvulcanized belt molded body during the vulcanization treatment, and to prevent the occurrence of a product defect due to a poor adhesion between the core wire and the rubber, and as a product. The aim is to improve belt quality and thereby reduce costs.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a mold assembly formed by fitting a tubular jacket to an unvulcanized belt sleeve wound around the outer peripheral surface of a tubular mold. in a state where installation was during the heating fluid on the outer peripheral side of the jacket, and the heating fluid respectively a feed freely configured and Aru belt vulcanizing apparatus in the interior of the mold, before liver Rudo the portion surrounded by the assembly and the upper lid communicated with one end, and is provided with a fluid path and the other end is communicated with the atmosphere, the lower side of said upper lid, said flange covering the upper release portion of the mold mold In addition to being provided with a diameter larger than that of the flange, the outer peripheral portion of the flange has a cut amount that does not communicate with the inner space of the mold from the outer periphery of the flange toward the center, and the axial direction of the mold Penetrates into Forming a Tsumizo and it is characterized by being configured so as to communicate the flow channel in the fluid path.
[0010]
According to the configuration of the first aspect, the following operation can be obtained. That is, in an apparatus that performs vulcanization processing with a mold assembly interposed between the upper and lower sides of the support base and the upper lid, the jacket is forcibly reduced and deformed to the inner diameter side by the heating and pressurized fluid supplied to the outer peripheral side thereof, Thereby, the unvulcanized belt compact is pressed in the radial direction. In this case, since a seal structure is adopted to seal between the upper and lower ends of the jacket and the support base and the upper lid, respectively, between these jackets, the support base, the upper lid, and the mold, that is, forming the unvulcanized belt The cylindrical space where the body exists is in a substantially sealed state.
[0011]
Therefore, in order to reduce the volume of the cylindrical space portion along with the diameter reduction deformation of the jacket, it is necessary to allow the internal air and gas components to escape to the outside of the cylindrical space portion. Or at least one end communicates with a portion surrounded by the mold assembly and the upper lid, and the other end has a fluid path communicating with the atmosphere. Can easily escape to the atmosphere through the pressurization process of the unvulcanized belt molded body so that air or gas components that cannot be removed will not remain on the belt part, etc. Can function sufficiently, and the occurrence of a defective belt having bubbles inside can be avoided.
[0013]
Further, according to the first aspect, the flange to be mounted to cover the release portion of the cylindrical mold upper, with a larger diameter than the mold, and the outer peripheral portion toward the center side from the outer periphery of the flange Since the cut amount is such that it does not communicate with the inner space of the mold, and a flow groove that penetrates in the axial direction of the mold is provided, the diameter reduction deformation of the jacket accompanying the vulcanization treatment, that is, As described above, even if the jacket comes into close contact with the outer periphery of the flange due to the neck tightening phenomenon in which the upper and lower ends of the jacket are tighter, the cylindrical space portion can be maintained in a state in which the inside and outside of the cylindrical space are communicated by the flow groove. Become.
[0014]
As a result, the inside and outside communication state of the cylindrical space portion by the fluid path can be maintained, and the air and gas components can be easily discharged to the outside of the cylindrical space portion. It is possible to contribute to performing the pressurizing function of the molded body satisfactorily and reliably without any trouble.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the vulcanizing apparatus K in which the unvulcanized rubber belt molded body 5 is set, and FIG. 2 shows the unvulcanized rubber belt molded body 5 used in the vulcanizing apparatus K. In the vulcanizing apparatus K and the unvulcanized rubber belt molded body 5, the same components as those of the conventional one shown in FIG. 7 described above are denoted by the same reference numerals, and therefore the description of the same parts is basically omitted. Shall be.
[0022]
The vulcanizing apparatus K is mainly for vulcanizing a double V-ribbed rubber belt DV (see FIG. 6), and is an unvulcanized rubber belt formed around an outer peripheral surface of a cylindrical mold 2. (An example of an unvulcanized belt sleeve) 5, a supporting assembly table (an example of a support table) 1 on which a mold assembly M formed by fitting a cylindrical rubber jacket 6 is mounted, and a mold assembly M. A first heat source mechanism N1 capable of freely supplying high-pressure steam (an example of a heated and pressurized fluid) to the outer peripheral side of the jacket 6 while equipping the vulcanizing can 7 with the upper lid 4 to be placed, and an internal space of the mold 2. And a second heat source mechanism N2 capable of supplying low-pressure steam.
[0023]
As a reference, the double V-ribbed rubber belt DV as a finished product has a core with an adhesive rubber layer interposed on both sides between an inner V rubber belt 5a and an outer V rubber belt 5c as shown in FIG. It has a cross-sectional structure in which wires 5b are arranged, and each V rubber belt is often formed in a toothed shape.
[0024]
The supporting assembling table 1 is configured by a horizontal circular plate-shaped body mounted and mounted on the upper surface of a receiving table 14 fixed to the lower inside of the cylindrical vulcanizing can 7. An introduction portion 13 that is just fitted into the mold 2 is fixed to the center portion, and a cylindrical bottom member 12 is attached below the center. The vulcanizing can 7 has a main body 7A having a high-pressure steam discharge port 9 formed in the center of the lower end, and a lid can that is detachably attached to the upper end of the main body 7A by screwing means or the like, and can be hermetically sealed when mounted. And a unit 7B.
[0025]
The first heat source mechanism N1 is provided with a high-pressure steam generation drive unit 15 and an inlet provided on a side surface at an upper end portion of the main body can 7A to supply the high-pressure high-temperature steam from the generation drive unit 15 into the vulcanization can 7. It is composed of a port 8 and the above-mentioned discharge port 9 and exerts a function of pressing the rubber jacket 6 in the diameter reducing direction.
[0026]
The second heat source mechanism N2 includes a high-temperature and low-pressure steam generation drive unit 16, an introduction pipe 10 mounted on the bottom member 12 for supplying the low-pressure and high-temperature steam from the generation drive unit 16 into the mold 2, and a discharge pipe 11 And has a function of supplying heat required for vulcanization to the unvulcanized rubber belt molded body 5 via the mold 2.
[0027]
As shown in FIG. 3, a flange 3 serving as a cover for covering an upper end opening portion of the mold 2 has a diameter larger than that of the mold 2 between an upper cover 4 serving as a cover of the mold assembly M and the mold 2. It is formed to have a diameter substantially equal to the maximum diameter of the belt sleeve 5a, and has a cut amount on the outer peripheral portion of the flange 3 from the outer periphery of the flange 3 toward the center so as not to communicate with the inner space of the mold 2. Further, a large number of flow grooves 17 penetrating in the axial direction of the mold 2 are formed. A large number of the flow grooves 17 are regularly arranged at regular intervals radially from the center of the flange 3 in plan view.
[0028]
With this configuration, the flange 3 is located at the upper end of the inner belt sleeve 5a, so that the upward movement of the unvulcanized belt molded body 5 can be stopped. The air and gas components can be maintained in a good discharging action.
[0029]
As shown in FIG. 1, one end communicates with a portion surrounded by a mold assembly M and a supporting assembly base 1, more specifically, a portion surrounded by a mold 2, an unvulcanized rubber belt molded body 5, a jacket 6, and the supporting assembly base 1. And a lower communication pipe (an example of a fluid path) 18 having the other end communicating with the atmosphere, the mold assembly M and the upper lid 4, more specifically, the mold 2, the unvulcanized rubber belt molded body 5, the jacket 6, and the upper lid 4. An upper communication pipe (an example of a fluid path) 19 is provided, one end of which communicates with the portion surrounded by.
[0030]
The upper communication pipe 19 is routed outside the vulcanizing can 7 through the upper lid 4 and the ceiling surface of the lid can 7B, and the lower communication pipe 18 is connected to the support assembly stand 1 and the main body can. It is arranged outside the vulcanizing can 7 through the bottom of 7A.
[0031]
Here, the unvulcanized rubber belt molded body 5 will be described. FIG. 2 shows the unvulcanized rubber belt molded body 5 fitted in the mold 2 with the flange 3. The unvulcanized rubber belt molded body 5 is formed by concentrically laminating an inner belt sleeve 5a made of a rubber material, an outer belt sleeve 5c made of a rubber material, and a core wire 5b interposed between the belt sleeves 5a and 5c. It is configured. As the core wire 5b, a cord having high strength and low elongation made of polyester fiber, aramid fiber, glass fiber or the like is used.
[0032]
At the upper end (an example of one end in the axial direction of the belt sleeve) and the lower end (an example of one end in the axial direction of the belt sleeve) between the core wire 5b and the outer belt sleeve 5c, a deaeration member 20 having air permeability is provided. The outer end in the belt sleeve axial direction is interposed so as to be located at a position closer to the outside than the belt sleeve axial end as the unvulcanized belt molded body 5. The inner and outer belt sleeves 5a and 5c are formed to have the same width dimension (axial dimension in the belt sleeve), and the core wire 5b is set to have a narrow width that is slightly retracted inward in both the upper and lower directions. ing.
[0033]
That is, as the air-permeable degassing member 20, a nonwoven fabric having a width of about 25 mm and being wound around the core wire 5b just once is selected, and the non-woven fabric is larger than the upper and lower ends of the outer belt sleeve 5c. They are provided at positions protruding upward and downward by about 5 mm, respectively. The pair of upper and lower nonwoven fabrics 20, 20 are formed by winding the unvulcanized belt formed body 5 sequentially around the outer periphery of the mold, that is, immediately before winding the outer belt sleeve 5c around the core wire 5b. By arranging them at the locations, they can be formed integrally with the unvulcanized belt molded body 5.
[0034]
Next, the vulcanizing step of vulcanizing process will be described with reference to unvulcanized rubber belt molded body 5 of the vulcanizer K and the double V-ribbed type described above. First, as shown in FIG. 1, a jacket 6 is fitted to an unvulcanized rubber belt molded body 5 having a mold 2 with a flange 3 to form a mold assembly M, and the mold assembly M is Are placed on the support assembly table 1 in an upright state, while being fitted to the introduction section 13.
[0035]
Next, the upper cover 4 is placed on the flange 3 and the jacket 6 so as to be in contact with the upper ends thereof, and then the first and second heat source mechanisms N1 and N2 are driven, and high-temperature and low-pressure steam is injected into the mold 2, and Then, high-temperature and high-pressure steam is supplied into the vulcanizing can 7, respectively. Then, the rubber jacket 6 is pressed from the outer peripheral side and is forcibly compressed in the direction of reducing the diameter, and the unvulcanized rubber belt molded body is heated and pressed while strongly pressing the outer belt sleeve 5c in the inner diameter direction. Sulfurize.
[0036]
At this time, as shown in FIG. 4, even if a neck-tightening phenomenon occurs in which the upper and lower ends of the jacket 6 are reduced in diameter, the outer diameter of the mold 2 in the supporting assembly table 1 is slightly larger than the outer diameter of the mold 2. When the jacket 6 is pushed to the mold 2 side by the lower communication pipe 18 disposed at the place where it is located and the upper communication pipe 19 through the flow groove 17 of the flange 3 whose upper end is tightly attached to the outer peripheral part of the jacket 6. In addition, surplus air and gas components or air around the core wire generated in a substantially closed space between the jacket 6, the mold 2, the upper lid 4, and the support assembly table 1 can be quickly released and extracted.
[0037]
As a result, there are inconveniences such as the occurrence of a defective belt having air bubbles therein, the above-mentioned porous defect caused by insufficient deaeration of the unvulcanized belt molded product, and the occurrence of a product defect due to a poor adhesion between the core wire and rubber. Can be avoided, and a good belt as a product can be produced.
[0038]
For reference, FIG. 5 shows the adhesive force between the core wire and the rubber (the inner and outer rubber belts) in each of the conventional belt and the belt using the vulcanizing apparatus and the unvulcanized belt formed body of the present invention. A bar graph is shown. From this bar graph, it can be understood that the belt according to the present invention has improved the adhesive strength between the core wire and rubber to twice or more the strength of the conventional belt.
[0039]
[Another embodiment]
A structure in which the deaeration member 20 is provided only at one of the upper end portion and the lower end portion of the unvulcanized belt molded body 5 or the communication pipes 18 and 19 are provided only at one of the support assembly table 1 and the upper lid 4 may be employed. good. Various types of belts to be vulcanized, such as a low-edge belt, a toothed belt, and a V-belt, are possible, and a state in which they are not vulcanized is generally referred to as an “unvulcanized belt sleeve”.
[0040]
The configuration of claim 3 is defined as a so-called double V-ribbed rubber belt. However, a general rubber belt such as a V-belt having a rubber belt portion only inside a core wire is not limited to a double-ribbed rubber belt. It is possible to interpose the deaeration member 20 between them.
[0041]
That is, "an unvulcanized belt molded body formed by concentrically laminating a belt sleeve and a core wire, and having an air permeability at one end in the belt sleeve axial direction between the core wire and the belt sleeve. The unvulcanized member in which the outer end in the belt sleeve axial direction is located at a position closer to the outside than the belt sleeve axial end as an unvulcanized belt molded body. Belt molded body ".
[0042]
The operation and effect of the above configuration are the same as the operation and effect of the configuration of claim 3, and the communication between the core wire portion and the outside of the belt molded body is maintained by the deaeration member, resulting in poor porous or core wire. This makes it possible to produce a good belt without problems such as poor adhesion between rubber and rubber.
[0043]
【The invention's effect】
As described above, in the belt vulcanizing apparatus according to the first aspect of the present invention, a fluid path communicating with the atmosphere is provided in a portion surrounded by the mold assembly and the support base or the mold assembly and the upper lid. Due to the necking phenomenon at the upper and lower ends of the jacket, air existing in the unvulcanized belt molding and air present in the gap between the unvulcanized belt molding and the jacket, or rubber during vulcanization It is possible to prevent or eliminate gas components generated from the vulcanization during the vulcanization and to prevent the gas components from being trapped in the vulcanization, thereby avoiding the generation of a defective belt having air bubbles therein, thereby making it possible to produce a good belt.
[0044]
Further, a belt vulcanizing apparatus according to claim 1, the distribution groove formed in the outer peripheral portion of the flange, it is possible to maintain the internal and external communication with the tubular space portion by the fluid pathway, using existing components while reasonable means, there is an advantage that can be achieved before Symbol effects more reliably.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a vulcanizing apparatus equipped with an unvulcanized belt formed body. FIG. 2 is a cross-sectional view showing an unvulcanized belt formed body having a mold. FIG. 3 shows a shape of a flange. FIG. 4 is an action diagram showing a neck tightening phenomenon caused by a jacket during vulcanization treatment. FIG. 5 is a bar graph showing an adhesive force between a core wire and rubber. FIG. 6 shows a structure of a double V-ribbed rubber belt. FIG. 7 is a cross-sectional view showing a conventional vulcanizing apparatus.
DESCRIPTION OF SYMBOLS 1 Support stand 2 Mold 3 Flange 4 Upper lid 5 Unvulcanized belt molded object 5a Inner belt sleeve 5b Core wire 5c Outer belt sleeve 6 Jacket 17 Flow grooves 18, 19 Fluid path 20 Deaeration member M Mold assembly

Claims (1)

A mold assembly formed by fitting a tubular jacket to an unvulcanized belt sleeve wound on the outer peripheral surface of a tubular mold is placed between a support base on which this is placed and an upper lid. A belt vulcanizing apparatus configured to be capable of supplying a heating pressurized fluid to an outer peripheral side of the jacket and a heating fluid to the inside of the mold, respectively.
Before liver Rudo assembly and communicated with one end in a portion surrounded by the upper lid, and is provided with a fluid path and the other end is communicated with the atmosphere,
On the lower side of the upper lid, a flange covering the upper end release portion of the mold is provided with a diameter larger than that of the mold, and on the outer peripheral portion of the flange, the mold is formed from the outer periphery of the flange toward the center side. The cut amount is such that it does not communicate with the inner space, and forms a flow groove that penetrates in the axial direction of the mold,
A belt vulcanizer configured to communicate the flow groove with the fluid path .

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