JPS5934496B2 - Manufacturing method of soundproofing/vibration proofing base plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a base plate for a railway track that requires a soundproof and vibrationproof structure.

Conventionally, this type of foundation plate was formed by applying a solvent-type adhesive to the surface of a rubber layer such as a flat rubber plate and bonding the surface layer such as a concrete plate, but this method According to , the adhesive does not evenly and evenly adhere to the bonding surface between the rubber layer and the surface layer, but is scattered, so the adhesive strength is weak and it is unsuitable for use as a base plate for railway tracks for vibration isolation. Ta.

Moreover, after bonding the surface layer to the rubber layer, the two do not stick together until a long period of time has passed (until natural crosslinking occurs), so the bonded object cannot be moved, making it unsuitable for mass production and cannot be produced in a factory. Also, it cannot be easily bonded at the construction site...
There were many shortcomings such as... SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for manufacturing a base plate for soundproofing and vibrationproofing railway tracks, which can eliminate the defects of the conventional products mentioned above. An embodiment of the present invention will be described below. The rubber layer a laid on the road bed 8 of the railway track is a rubber plate with a smooth surface such as a synthetic rubber plate, and its thickness is 3 cTn or more, and its width is at least the track width. This is what I did.

The pressure-sensitive double-sided adhesive tape b is prepared by adhering an adhesive solvent having the following composition to both sides of a support body b made of tough cloth.

In other words, the adhesive of the conventional pressure-sensitive I double-sided adhesive tape is blended with a vulcanizing agent such as sulfur and a vulcanizable accelerator-free vulcanizing agent consisting of a vulcanizing aid. Isoprene butyl rubber (100 parts) Calcium carbonate (200 parts) Aliphatic thermoplastic resin (80 parts) Polyisobutylene low polymer (70 parts) Zinc white (5 parts) Stearic acid (1 part) Sulfur (2 parts) An example of the formulation of the sulfur accelerator liquid b' is as follows.

Thiuram accelerator: 5% Toluene: 95% Further, it is of course possible to use commonly used super accelerators for room temperature vulcanization such as dithiocarbamate type and xanthate type.

Further, the surface layer c is a concrete plate on which the tracks 7, 7 are placed and fixed.

A vulcanization accelerator liquid b' is applied to the surface of the rubber layer a using a roll for applying a vulcanization accelerator liquid.

Next, the pressure-sensitive double-sided adhesive tape b is sequentially rolled out along this coated surface, and the surface layer c whose back side is coated with the vulcanization accelerator liquid b' with a roll is placed on top of this double-sided adhesive tape b. are pressed with a pressure roller to form rubber layer material a and surface layer material c.
Glue them together. Rubber layer a with the above pressure roller,
When the pressure-sensitive double-sided adhesive tape b and the surface layer c are pressed together, the bonding surface between the rubber layer and the surface layer of the pressure-sensitive double-sided adhesive tape b is cured by the vulcanization accelerator liquids b' and b'. As the crosslinking progresses, the cohesive force increases and solidifies, thereby fixing the rubber layer material a and the surface layer material c together.

However, although the inside of this pressure-sensitive double-sided adhesive tape b is in a sticky state (unvulcanized state), it is supported by the support body b1, and the sticky material does not move.

Figure 1 shows a surface layer c on both the front and back sides of pressure-sensitive double-sided adhesive tape b.
FIG. 2 is a vertical cross-sectional view showing the state in which the rubber layer material a and the rubber layer material a are bonded together with a pressure roller, and in this state, the vulcanization accelerator liquids b' and b' As a result, the crosslinking of the joint surface of the pressure-sensitive double-sided adhesive tape b is completed, and the surface layer c and the rubber layer a are fixed together. FIG. 3 and FIG. 4 show the state in which the present invention is installed on an elevated track.

Soundproofing according to the present invention. The foundation plate of a railway track for vibration isolation is made by applying a vulcanization accelerator solution to the adhesive surface of a rubber layer with a width equal to or greater than the track width that is laid on the roadbed of the railway track, and adding a vulcanizing agent to this coated surface. Then, on top of this adhesive tape, a surface layer made of a concrete plate on which a track whose adhesive surface is coated with the vulcanization accelerator liquid is placed, and then the pressure-sensitive double-sided adhesive tape is applied. The rubber layer and the surface layer are bonded together by quickly solidifying the adhesive surfaces of the rubber layer and the surface layer, so it is easy to bond the rubber layer and the surface layer at the construction site. Surface layers made of concrete plates can be firmly fixed together using pressure-sensitive double-sided adhesive tape.

Therefore, compared to a method in which the adhesive is transported to the construction site and laid on the roadbed, the construction workability is extremely good and the flexibility is also good. That is, for example, after laying one elongated rubber layer on a roadbed, a large number of surface layers made of concrete plates can be sequentially placed on the rubber layer with pressure-sensitive double-sided adhesive tape interposed therebetween.
After placement, the vulcanization accelerator liquid provided on the adhesive tape bonding surface of the rubber layer and the surface layer reacts with the pressure-sensitive double-sided adhesive tape containing a vulcanizing agent, and the surface layer and the rubber layer are bonded together. Since it is quickly and firmly fixed, it is convenient to immediately install tracks etc. on the surface layer.

Furthermore, the pressure-sensitive double-sided adhesive tape before bonding does not contain a vulcanization accelerator, so it has a good shelf life, and it does not undergo chemical changes until just before use, so its adhesive strength is not impaired. In addition, a vulcanization accelerator solution is applied to the adhesive surface between the rubber layer and the surface layer.
Since a pressure-sensitive double-sided adhesive tape containing a vulcanizing agent is attached to this adhesive surface, the rubber layer and surface layer are firmly bonded together and can be peeled off even by vibrations from trains, etc. There is no. In addition, achieve the intended purpose.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a longitudinal cross-sectional view showing the state at the moment of adhesion, FIG. 2 is a longitudinal cross-sectional view showing the state in which the joint surfaces are fixed after adhesion, FIG. 4 is a longitudinal sectional view and a partially cutaway plan view showing the state of use. In the figure, a indicates the rubber layer, b the pressure-sensitive double-sided adhesive tape, c the surface layer, and b' the vulcanization accelerator liquid.

Claims (1)

[Claims] 1. A vulcanization accelerator solution is applied to the adhesive surface of a rubber layer with a width equal to or greater than the track width to be laid on the roadbed of a railway track, and a pressure-sensitive double-sided adhesive tape containing a vulcanizing agent is layered on this coated surface. Next, on top of this adhesive tape, a surface layer made of a concrete plate on which a track whose adhesive surface is coated with the vulcanization accelerator liquid is placed, and the rubber layer and surface layer of the pressure-sensitive double-sided adhesive tape are layered. A method for manufacturing a foundation plate for a railway track for soundproofing and vibrationproofing, characterized in that a rubber layer and a surface layer are fixed together by rapidly solidifying the adhesive surface to an object.