JPH10264176A - Vulcanizing method for rubber laminated product and vulcanizing device used in the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vulcanizing method for a rubber laminated product of inexpensive equipment cost and superior productivity and also provide a vulcanizing device used in the method. SOLUTION: Unvulcanized rubbers and inner steel plates are laminated alternately on a molding mantle 5, and a rubber laminate molded body 6 with connecting steel plates fitted on the upper and lower ends is fitted thereon. Upper and lower flange members 11 and 12 are brought into contact with the upper and lower faces of a rubber laminate molded body 6 and mounted thereon, and the rubber laminate molded body 6 and the upper and lower flange members 11 and 12 are fitted in a rubber sleeve 3. A high temperature high pressure fluid is fed into a closed space 13 in the above state and heated and pressurized from the periphery and heated by a high temperature fluid from the inside of the molding mantle 5 to vulcanize the rubber laminate molded body 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for vulcanizing rubber laminated products such as seismic isolation rubber and bearing rubber, and a vulcanizing apparatus used therefor.

[0002]

2. Description of the Related Art In general, rubber laminated products such as seismic isolation rubber and bearing rubber are obtained by vulcanizing a rubber laminated molded product obtained by alternately laminating unvulcanized rubber and a metal plate. Heretofore, a so-called heat compression method has been used in which such a rubber laminated molded article (unvulcanized) is charged into a mold and heated and compressed from above and below by a press device.

[0003]

However, according to such a heating and compression method, in addition to the complicated structure of the mold, the size of the product (seismic isolation rubber, bearing rubber, etc.) is relatively large. Equipment costs have been high due to reasons such as an increase in the size of a mold and a press device. In addition, it takes a long time to prepare the rubber laminated molded body before vulcanization and take out the product after vulcanization, and the productivity is low. There is a problem that heat is easily radiated from the press device and the thermal efficiency is low.

As a method for efficiently vulcanizing a cylindrical rubber molded body, for example, as described in Japanese Patent Publication No. 7-37028, vulcanizing a cylindrical belt molded body using a sleeve is known. Are known. This is for vulcanizing a thin cylindrical belt molding (unvulcanized). However, seismic isolation rubber has a very large radial thickness and is structurally unvulcanized rubber. And a metal plate are alternately laminated, which is greatly different from the belt molded body, and the above-described technology cannot be applied as it is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vulcanizing method for a rubber laminated product which is inexpensive and has excellent productivity and a vulcanizing apparatus used therefor.

[0006]

According to the first aspect of the present invention, a vulcanization is performed by mounting a cylindrical rubber laminate formed by alternately laminating unvulcanized rubber and a metal plate on a cylindrical molding mantle. Vulcanizing a laminated rubber product, wherein a rubber sleeve is attached to the inner peripheral side of a cylindrical outer frame having an open top and bottom so as to form an annular closed space between the outer frame and the rubber sleeve. Inside the sleeve, upper and lower flange members are provided so as to abut against the upper and lower surfaces, and a rubber laminated molded body mounted on the molding mantle is charged, and a high-temperature and high-pressure fluid is supplied to the closed space. A high-temperature fluid is supplied to the inside of the molding mantle for vulcanization.

By adopting this vulcanization method, the cylindrical rubber laminated molded article is heated and pressurized from the surroundings by a high-temperature and high-pressure fluid via a rubber sleeve, and simultaneously heated from the inside by the heated fluid. . In addition, since the unvulcanized rubber and the metal plate (internal steel plate) are alternately laminated at substantially constant intervals in the vertical direction in the cylindrical rubber laminated molded body, and the connecting steel plates are arranged at the upper and lower ends, And the heat applied from the inside is transmitted equally in the vertical and radial directions. Therefore, excessive or insufficient vulcanization does not occur locally, and the adhesive force between the metal plate and the rubber, which appears simultaneously with the vulcanization, is stable with little variation. Here, the high temperature in the high temperature and high pressure fluid refers to a level of 150 to 200 ° C., and the high pressure refers to a level of 9 to 15 Kgf / cm ² .

According to a second aspect of the present invention, in the method for vulcanizing a rubber laminated product according to the first aspect, the vulcanization is performed in a state in which an upper surface and a lower surface of the rubber laminate are pressed by a pressing means. It is.

Accordingly, the rubber laminated molded body is heated and pressurized from the outer periphery while the upper and lower surfaces are pressurized by the pressurizing means, and is also heated from the inside to perform vulcanization. Later variations in product height are reduced.

According to a third aspect of the present invention, there is provided a vulcanizing apparatus for a rubber-laminated product in which an unvulcanized rubber and a metal plate are alternately laminated on a cylindrical molding mantle and vulcanized. A cylindrical outer frame whose upper and lower sides are open, and the rubber laminated molded body is mounted on the inner side of the outer frame so as to form an annular closed space between the outer frame and the outer frame. A rubber sleeve to be inserted, upper and lower flange members provided above and below the rubber laminated molded body so as to contact the upper and lower surfaces thereof, and an outer side for injecting and discharging a high-temperature and high-pressure fluid into and from the closed space. Fluid injecting / discharging means, and injecting / discharging means for injecting / discharging a high-temperature fluid into the molding mantle.

This vulcanizing apparatus has a simple configuration of a cylindrical outer frame with an open top and bottom, a rubber sleeve, and a supply / discharge facility for high-temperature and high-pressure fluid, and requires only a rubber sleeve instead of a mold. Equipment costs, including costs, are low.

According to a fourth aspect of the present invention, in the vulcanizing apparatus for a rubber laminated product according to the third aspect, an upper hydraulic cylinder associated with the upper flange member via a piston rod;
A lower hydraulic cylinder associated with the lower flange member via a piston rod, an operating state of supplying and discharging a working fluid to the two hydraulic cylinders, and an upper and lower flange member on the rubber laminated molded body. And a hydraulic pressure control means for switching between a locked state in which the supply and discharge of the working fluid to the hydraulic cylinders is prohibited when the hydraulic cylinder is positioned at the pressing position with respect to the lower surface.

Accordingly, the hydraulic pressure control means first sets the upper and lower hydraulic cylinders to an operating state,
Supply and discharge of working fluid to and from both hydraulic cylinders are performed, and supply and discharge of working fluid to and from both hydraulic cylinders are performed when the upper and lower flange members are located at pressing positions against the upper and lower surfaces of the rubber laminate. Is locked, and the state in which the upper and lower flange members are positioned at the pressing positions with respect to the upper and lower surfaces of the rubber laminate is maintained.

[0014]

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

In FIG. 1 which shows a schematic configuration, reference numeral 1 denotes a vulcanizing device for a rubber laminated product (seismic isolation rubber), which has a cylindrical outer frame 2 whose upper and lower sides are open, The upper and lower peripheral edges of a cylindrical rubber sleeve 3 are hermetically attached by mounting brackets 4A and 4B, and are mounted on a base plate 100. Inside the rubber sleeve 3, a rubber laminated molded body 6 mounted around a cylindrical molding mantle 5 located at the center is inserted.

As shown in detail in FIG. 2, the rubber laminated molded body 6 is provided for a cylindrical molding mantle 5 located at the center, and comprises an unvulcanized rubber 7,. Some relatively thin (3 to 8 mm thick) internal steel plates 8 are alternately laminated, and relatively thick (20 to 30 mm thick) connecting steel plates 9 and 10 are provided above and below them. And is formed in a thick cylindrical shape. Upper and lower flange members 11 and 12 are attached to the upper and lower surfaces of the rubber laminated molded body 6 so as to contact the upper and lower surfaces. The upper and lower flange members 11 and 12 are formed to have a diameter slightly larger than that of the rubber laminated molded body 6, and the outer peripheral surface thereof is a tapered surface whose diameter increases as the distance from the rubber laminated molded body 6 increases.

An annular closed space 13 is formed between the outer frame 2 and the rubber sleeve 3.
A high-temperature and high-pressure fluid injection / discharge means (not shown) is connected through a high-temperature and high-pressure fluid supply / discharge port 14 opened in the above, thereby injecting the high-temperature and high-pressure fluid into the closed space 13,
The rubber laminated molded body 6 is heated and pressed from the surroundings.

The upper and lower flange members 11 and 12 are
Through holes 11a and 12a are formed in the center. An injection port 15 for injecting a high-temperature fluid into the forming mantle 5 is communicated with the upper part of the forming mantle 5 through the through hole 11 a of the upper flange member 11, and is formed through the through hole 12 a of the lower flange member 12. An outlet 16 for further discharging to the outside communicates with a lower portion of the forming mantle 5. The inlet 15 and the outlet 16 are connected to high-temperature fluid injecting / discharging means (not shown) through connecting pipes 17 and 18.

Therefore, the upper and lower flange members 11,
The rubber laminated molded body 6 to which the rubber laminated molded body 12 is attached is inserted into the rubber sleeve 3 and a high-temperature and high-pressure fluid is supplied and discharged through the supply / discharge port 14, thereby heating and pressurizing the rubber laminated molded body 6 from the surroundings, By injecting a high-temperature fluid into the molding mantle 5 from 15, vulcanization is also performed by heating the rubber laminated molded body 6 from the inside.

The pressurization by the high-temperature and high-pressure fluid is performed via the rubber sleeve 7 and is substantially uniformly applied over the entire outer peripheral portion. The heat of heating by the high-temperature fluid is passed through the internal steel plates 8,...
It is transmitted from the outer circumference and the inner circumference to the center of thickness. In this case, since the steel plates 8,..., 9, 10 are alternately and uniformly laminated with the unvulcanized rubber 7, heat is transmitted substantially uniformly not only in the thickness direction but also in the vertical direction. The rubber sleeve 3
Covers the outer peripheral portion of the rubber laminate molded body 6, so that heat radiation is significantly reduced, so that it is effectively heated,
Vulcanization with good thermal efficiency and small temperature unevenness can be performed, and vulcanization time can be shortened.

As described above, the mold and the press device conventionally required are no longer required, and the simple structure using the outer frame 2, the rubber sleeve 3, the upper and lower flange members 11 and 12, the high-temperature high-pressure fluid and the high-temperature fluid is used. The apparatus enables vulcanization with less temperature unevenness in a short time, reduces equipment costs, and provides a rubber laminated product with a uniform degree of vulcanization and without adhesion unevenness.

Further, as shown in FIG. 3, the upper and lower flange members 11 and 12 are mechanically pressed from the upper and lower sides, respectively, and the rubber laminated molded body 6 is vulcanized by the two flange members 11 and 12. Variations in the height of the product after vulcanization can be reduced by regulating the change in the height in the middle.

That is, as shown in FIG.
An inlet 15 communicating with the upper flange member 11 through the through hole 11a thereof is connected to the lower end of the piston rod 21a of the upper hydraulic cylinder 21 so as to move up and down through the upper flange member 11. It has become.

The upper and lower flange members 11, 1
Reference numeral 2 denotes a disk-shaped substrate portion 11b, 12b, and rod-shaped upper and lower engagement support portions 11c, 11c, 12c, 1 protruding above or below the substrate portion 11b, 12b.
2c. The upper and lower flange members 1
1, 12 upper and lower engagement support portions 11c, 11c, 1
2c and 12c have upper and lower hooks 22 and 23, respectively.
And the upper and lower hooks 22, 23
Are the upper or lower hydraulic cylinders 24, 24, 25, 25
The upper or lower hydraulic cylinders 24, 24, 2 are connected to piston rods 24a, 24a, 25a, 25a.
5, 25, the upper and lower flange members 11, 1
2 is positioned at a pressing position for pressing the upper surface and the lower surface of the rubber laminated molded body 6 with an appropriate pressure.

Each hydraulic cylinder 24, 24, 25, 25
Is operated by supply and discharge of a working fluid. The operating state of supplying and discharging the working fluid to and from the hydraulic cylinders 24, 24, 25 and 25, and the upper and lower flange members 11 and 12 Hydraulic cylinders 24, 24, 25, 2 when moved to the pressing position against the upper and lower surfaces of
5 to prevent the hydraulic fluid from flowing into and out of the hydraulic cylinder 2
The pressure is controlled by a hydraulic pressure control means (not shown) for switching to a locked state in which the operations of 4, 24, 25, 25 are stopped.
In the locked state, the upper and lower flange members 1
If you try to move 1 and 12, it will not move.

With the above construction, the forming mantle 5
The upper and lower hydraulic cylinders 24 and 24 move the upper flange member 11 downward and the lower hydraulic cylinders 25 and 25 lower the upper flange member 11 accordingly. Since the side flange members 12 can be respectively moved upward, the upper and lower ends of the rubber laminated molded body 6 can be pressed with an appropriate pressure (for example, 50 to 200 kg).

Therefore, the upper and lower ends of the rubber laminate molded body 6 are pressed with appropriate pressure without gaps between the upper and lower flange members 11 and 12, and vulcanization is performed while maintaining a uniform pressure state. It is possible to obtain a vulcanized rubber laminated molded article with less variation in height.

When vulcanization is completed, the working fluid is supplied to and discharged from each of the upper and lower hydraulic cylinders 24, 24, 25, 25,
The upper and lower flange members 11, 12 are separated from the vulcanized product.

In the above-described embodiment, the present invention is applied to the seismic isolation rubber which is a rubber laminated product of a type without a flange. However, the present invention is not limited to this. The present invention can be applied not only to the seismic isolation rubber of the flange type but also to other rubber laminated products such as a bearing rubber.

[0030]

According to the method for vulcanizing a rubber laminated product of the present invention, as described above, the outer peripheral portion of the rubber laminated molded product is covered with a rubber sleeve, and in this state, the rubber laminated molded product is surrounded by a high-temperature high-pressure fluid. While heating and pressurizing from the inside, it is heated from the inside by a high-temperature fluid, and the heat is transmitted uniformly in the vertical and radial directions through metal plates arranged at regular intervals, so local vulcanization over or insufficient vulcanization It is unlikely to occur. In addition, since heat radiation can be prevented by the rubber sleeve, vulcanization can be performed with high thermal efficiency even when the height of the product is relatively large, and the vulcanization time can be shortened. In addition, since the upper and lower surfaces of the rubber laminate are pressurized and vulcanization is performed in that state, variations in the height of the product after vulcanization can be reduced.

The vulcanizing apparatus for a laminated rubber product of the present invention supplies a high-temperature and high-pressure fluid to a cylindrical outer frame, a rubber sleeve covering the periphery of the laminated rubber molded product, a closed space defined by the rubber sleeve, and a molding mantle. Since a simple configuration of the discharging means is sufficient, the cost of equipment can be significantly reduced as compared with a conventional vulcanizing apparatus requiring a mold and a press.

Further, the vulcanizing apparatus for a rubber laminated product of the present invention uses upper and lower hydraulic cylinders as pressurizing means,
Since the piston rod is connected to the upper and lower flange members, the operation of the upper and lower hydraulic cylinders can be easily controlled and vulcanized by pressurizing the upper and lower surfaces of the rubber laminate. Can be released after vulcanization.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a vulcanized state of a rubber laminated product (seismic isolation rubber) according to the present invention.

FIG. 2 is an explanatory view of an unvulcanized rubber laminate molded article according to the present invention.

FIG. 3 is a view similar to FIG. 1, illustrating an embodiment having upper and lower pressing means.

[Description of Signs] 1 Vulcanizing device for rubber laminated product (seismic isolation rubber) 2 Outer frame 3 Rubber sleeve 5 Molding mantle 6 Rubber laminated molded article 7 Unvulcanized rubber 8 Internal steel plate 9 Connecting steel plate 10 Connecting steel plate 11 Upper flange member 12 Lower flange member 13 Closed space 24 Upper hydraulic cylinder 25 Lower hydraulic cylinder

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29K 105: 24 B29L 31:00

Claims (4)

[Claims] 1. A vulcanizing method for a rubber laminated product, comprising: attaching a vulcanized rubber molded product obtained by alternately laminating unvulcanized rubber and a metal plate to a cylindrical molding mantle and vulcanizing the vulcanized rubber product. A rubber sleeve is attached to the inner peripheral side of the cylindrical outer frame whose upper and lower sides are open so as to form an annular closed space between the outer frame and the outer peripheral frame. The upper and lower flange members are mounted on the rubber mandrel and the rubber laminated molded body is mounted on the molding mantle. Then, a high-temperature and high-pressure fluid is supplied to the closed space, and a high-temperature fluid is supplied into the molding mantle. And vulcanizing the rubber laminated product. 2. The method for vulcanizing a rubber laminated product according to claim 1, wherein the vulcanization is performed in a state where the upper surface side and the lower surface side of the rubber laminated molded body are pressed by a pressing means. 3. A vulcanizing apparatus for a rubber laminated product, in which an unvulcanized rubber and a metal plate are alternately laminated on a cylindrical molding mantle and vulcanized by vulcanizing the laminated rubber product. An open cylindrical outer frame, and a rubber sleeve mounted on the inner peripheral side of the outer frame so as to form an annular closed space between the outer frame and the rubber laminated molded body inserted therein. And upper and lower flange members provided above and below the rubber laminated molded body so as to contact the upper and lower surfaces thereof, and an injection / discharge means for injecting and discharging a high-temperature and high-pressure fluid into and from the closed space, A vulcanizing apparatus for a rubber laminated product, comprising: an injecting / discharging means for injecting / discharging a high-temperature fluid into / from the molding mantle. 4. An upper hydraulic cylinder associated with the upper flange member via a piston rod, a lower hydraulic cylinder associated with the lower flange member via a piston rod, and both hydraulic cylinders. And a lock for prohibiting the supply and discharge of the working fluid to and from the hydraulic cylinders when the upper and lower flange members are positioned at the pressing positions with respect to the upper and lower surfaces of the rubber laminate. 4. A vulcanizing apparatus for a rubber laminated product according to claim 3, further comprising a hydraulic control means for switching between the state and the state.