JP2003231147A - Structure of rubber support molding die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a rubber support molding die which makes it possible to use a die widely corresponding to changes of the dimension and rubber quality of a rubber support and ensures the flatness of the side surface of the rubber support product, capable of preventing a defective dimension and flatness defect. <P>SOLUTION: A rubber-outflow slit 13a to 13d, 14a to 14d having a required width, e.g. 0.5 to 1 mm, are formed at the ridge line part X1 to X4 of a spacer 8 with a lower die 4 and the ridge line part Y1 to Y4 at which the spacer 8 contacts with an upper molding plate 10. And, also, rubber reservoirs 15a to 15d, 16a to 16d, located upper and lower, with a required volume, interconnecting with the slit 13a to 13d, 14a to 14d, are formed at the upper molding plate 10 and the spacer 8. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a mold for molding a rubber bearing, and more specifically, it can be used for a general purpose even if the product size of the rubber bearing and the rubber material are changed. The present invention relates to a structure of a rubber support molding die which has a smooth product side surface and can prevent dimensional defects, flatness defects and the like.

[0002]

2. Description of the Related Art For example, a rectangular rubber bearing 1 which has been conventionally used as a bearing for building structures and civil engineering structures.
As shown in FIGS. 6 and 7, the structure of the upper and lower face plates 1a,
It is configured by laminating a plurality of rubber plates 2 provided with 1b and a metal plate 3.

As a mold for molding a rubber bearing body for manufacturing such a rubber bearing body 1, as shown in FIG.
When an outer shell is formed by the upper mold 5 and a plurality of side molds 6 and the rubber bearing 1 is vulcanized and molded, the rubber bearing is preformed on the lower mold 4 via the lower molding plate 7. Place 1 and
A spacer 8, a plurality of side blocks 9 and a side die 6 are arranged on the peripheral side surface of the rubber bearing 1, and an upper molding plate 10, a plurality of pushing plates 11 and an upper die 5 are mounted on the upper surface. It is performed with the whole placed in a tightened state.

The tapered inclined portions 6x formed at the upper and lower end portions of the side die 6 and the projecting engagement portions 4x, 5x formed at the inner peripheral edge portions of the lower die 4 and the upper die 5 are engaged during assembly. Configured to match.

Further, during vulcanization molding, in order to obtain dimensional accuracy of the product outer dimensions of the rubber bearing 1, flatness, and interlayer thickness of the laminated rubber, and the flow of the rubber in the mold, the internal steel plate (metal plate 3) is obtained. 1.5mm to 3.0m in diameter on the side surface of the spacer 8 (die) that is in contact with the rubber bearing product in order to prevent it from moving.
A large number of m vent holes 12 (holes for rubber outflow) are provided to disperse the rubber overflow at the time of vulcanization to flow out.

[0006]

However, the product size of the rubber support 1 varies depending on the application, and the flow of rubber in the vent hole 12 differs depending on the rubber material used, so that the product of each support is different. There is a problem that the design (position, diameter, length, volume) of the vent hole portion is required, and a large amount of cost is required for manufacturing the spacer 8.

Further, when the overflow of the vent hole cannot be fully taken out due to the variation in the volume of rubber charged in the mold, the expansion pressure of the rubber causes the mold to open,
There was a problem that the specified height could not be obtained, and the plane failure of the product occurred.

Further, the rubber of the vent hole portion becomes a spie (beard-like protrusion) after vulcanization and remains on the side surface of the product, but the spie must be finished to 0.5 mm or less in order to prevent appearance defects and the like. Therefore, there has been a problem that it takes much time and labor to finish the surface.

The present invention has been devised in view of the above-mentioned conventional problems. Even if the product size of the rubber bearing and the rubber material are changed, the mold can be used universally, and a large number of vent holes are formed in the spacer. Without forming the, the side surface of the product is smooth, and it is possible to prevent dimensional defects and flatness defects.
An object of the present invention is to provide a structure of a mold for molding a rubber bearing, which can simplify the surface finish.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the gist of the present invention is to form a rubber outflow slit at a ridge line portion where a spacer and a lower mold and an upper molding plate are in contact with each other. is there.

A rubber reservoir communicating with the slit is formed on the upper molding plate and the spacer, and the slit has a width of 0.5 to 1 mm. The rubber reservoir has a volume of 100 to 100 times the overflow volume of the rubber. It is set to 120%.

As described above, in the present invention, the rubber outflow slit is formed in the ridge portion where the spacer is in contact with the lower mold and the upper molding plate, so that the side surface of the product is smooth without forming a vent hole in the spacer. It is possible to prevent dimensional defects, flatness defects, etc., and even if the product size of the rubber bearing and the rubber material are changed, the mold can be used for general purposes and the surface finish can be simplified. Is.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

The same components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a plan view of a mold for molding a rubber bearing according to the present invention, and FIG. 2 is a sectional view taken along the line A--A of FIG. 1, showing a rectangular shape molded by such a mold. Rubber support 1
This structure is constructed by laminating a plurality of rubber plates (not shown) having upper and lower face plates 1a and 1b and a metal plate.

As shown in FIGS. 1 and 2, the rubber bearing molding die is composed of a lower die 4, an upper die 5, a side die 6, a spacer 8, an upper molding plate 10, a pushing plate 11 and the like. Has been done.

The pressing plate 11 may be a single plate, but it is also possible to use a pressing plate 11a divided into a plurality of parts such as four as shown in FIG.

A ridge line portion X1 between the spacer 8 and the lower mold 4.
To X4 and the ridge line portions Y1 to Y4 where the spacer 8 and the upper molding plate 10 contact each other, a predetermined width, for example, a width of 0.5 to 1
slits 13a to 13d for flowing out rubber formed in mm,
14a to 14d are formed, and the upper molding plate 10 is formed.
And the spacer 8 includes the slits 13a to 1
Upper and lower rubber reservoirs 15a to 15d and 16a to 16d having a predetermined volume and communicating with 3d and 14a to 14d are formed.

The upper and lower rubber reservoirs 15a to 15d, 1
The volume of 6a to 16d is 1 of the rubber overflow volume.
It is preferably set to 00 to 120%.

In this way, the rubber outflow slits 13a ...
When the widths of 13d and 14a to 14d are set to 0.5 to 1 mm, the dimensional stability and the flatness can be further improved, and the upper and lower rubber reservoirs 15a to 15d and 16a to 1 are provided.
The volume of 6d, that is, the overflow amount is 100 to 12
When it is set to 0%, dimensional stability and flatness can be further improved.

The structure of the spacer 8 is not limited to the above-mentioned embodiment, and in order to improve the flatness and appearance of the metal plate 3 (inner steel plate) due to the dispersion of the overflow of the rubber material, the metal plate 3 (inner steel plate) is bent. For example, as shown in FIGS. 4 and 5, a rubber reservoir 17 may be formed on the side surface portion.

As described above, in the mold for molding the rubber bearing of the present invention, the overflow of the rubber material generated during the vulcanization of the rubber bearing 1 is provided in the spacer 8 in contact with the product of the rubber bearing 1 through the slits. 13a to 13d, 14a to 14d
Therefore, even if the product size and the rubber material are changed, the mold can be used as a general purpose by making it flow out evenly to each ridge line.

Further, since there is no vent hole, the side surface of the product is smooth and the appearance is good, and finishing work such as spews flowing out from the vent hole is unnecessary. Further, compared with the vent holes, the slits 13a to 13d, 14a to 14d
Since the rubber has a large cross-sectional area, it is possible to prevent the occurrence of dimensional defects and flatness defects because the rubber easily flows and the overflow cannot be completely output.

[0024]

EFFECTS OF THE INVENTION The present invention has the following excellent effects because the rubber outflow slit is formed in the ridge portion where the spacer and the lower mold and the upper molding plate contact each other as described above. . (a). Since it is not necessary to form a large number of vent holes in the spacer as in the conventional case, the mold can be used universally even if the product dimensions of the rubber bearing and the rubber material are changed. (b). Since the spacer does not have many vent holes, the side surface of the product is smooth and the appearance can be improved. (c). Since the slit has a larger cross-sectional area than the vent hole, it is possible to prevent the occurrence of dimensional defects and flatness defects because rubber easily flows and overflow does not come out. (d). Dispersion of the overflow of the rubber material can prevent the bending of the metal plate and can improve the flatness and the appearance.

[Brief description of drawings]

FIG. 1 is a plan view of a rubber bearing molding die according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan view showing another embodiment of the push plate.

FIG. 4 is a front view showing another embodiment of the spacer.

FIG. 5 is a plan view of FIG.

FIG. 6 is a cross-sectional view of a conventional rubber bearing molding die.

FIG. 7 is a cross-sectional view of another conventional metal mold for molding a rubber bearing.

[Explanation of symbols]

1 Rubber support 1a, 1b Upper and lower plate 2 Rubber plate 3 Metal plate 4 Lower mold 5 Upper mold 6 Side mold 7 Lower molding plate 8 Spacer 9 Side block 10 Upper molding plate 11 Push plate 12 Vent hole 6x Tapered slope 4x , 5x Protrusion-shaped engaging portions X1 to X4, Y1 to Y4 Ridge line portions 13a to 13d, 14a to 14d Slits 15a to 15d, 16a to 16d for rubber outflow Upper and lower rubber reservoirs 17 Rubber reservoirs

Continued front page    F term (reference) 2D059 AA40 GG01 GG05 GG17 GG35                       GG59 GG61                 4F202 AA45 AC03 AD03 AD08 AD35                       AG03 AH46 CA09 CB01 CB12                       CB20 CK11 CK42                 4F204 AA45 AD03 AG03 AH46 AM32                       FA01 FB01 FB11 FN11 FQ15

Claims (4)

[Claims] 1. A rubber support body, in which a plurality of rubber plates having upper and lower surface plates and metal plates are laminated on a lower mold via a lower molding plate, and a spacer is provided on a peripheral side surface of the rubber support body. In a structure of a rubber bearing molding die in which a side die is disposed and an upper die is placed on an upper surface via an upper shaping plate to form a rubber bearing, a spacer, a lower die and an upper shaping plate are provided. The structure of a rubber support molding die in which a slit for rubber outflow is formed in the ridge line portion in contact with. 2. The structure of the rubber bearing molding die according to claim 1, wherein a rubber reservoir communicating with the slit is formed in the upper molding plate and the spacer. 3. The structure of a rubber bearing molding die according to claim 1, wherein the slit has a width of 0.5 to 1 mm. 4. The structure of the rubber bearing molding die according to claim 2, wherein the volume of the rubber reservoir is set to 100 to 120% of the overflow volume of the rubber.