JPS5940613B2 - Manufacturing method of vibration-proof rubber with epoxy resin plate for installing bolts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a vibration isolating rubber with an epoxy resin plate in which mounting bolts are embedded.

Generally speaking, anti-vibration rubber is installed and functionally as shown in Figure 1.
A plate 2 is bonded to the vibration-proof rubber body 1, and bolts 3 are installed in the grate 2.

. Conventionally, the anti-vibration rubber plate 2 of the above-mentioned structure must be a metal plate in order to attach the bolt 3, that is, to attach it by welding.

However, here, instead of the metal plate 2, a reinforcing material such as carbon fiber is mixed into the epoxy resin.

If a resin plate is used, this material has a significantly higher damping rate than metal materials, and is advantageous in terms of weight reduction, rust prevention, etc., as well as the effect of improving the function of the anti-vibration rubber. It is clear that

Data has confirmed that epoxy resin materials mixed with reinforcing materials such as carbon fiber can be used as plate materials for anti-vibration rubber in terms of strength. There is no suitable means, and until now there is no anti-vibration rubber with an epoxy resin plate to which bolts can be installed.

The present invention has been made in view of the above circumstances, and the gist thereof is to punch out a desired external shape from an epoxy resin mat in a plastic state into which reinforcing fiber material such as carbon fiber is mixed, and to attach bolts to the mat. A small hole is made at the position, a bolt with a serration is inserted into the small hole and seated to form a plate with a bolt, and the plate is placed in a predetermined position in an injection type vulcanization mold and placed inside the product cavity. The manufacturing method involves injecting unvulcanized rubber under pressure into a vulcanized mold, and pressurizing and heating the vulcanized mold.

Next, this will be explained in more detail.

First of all, an epoxy resin mat mixed with a reinforcing material such as carbon fiber is molded to a required thickness, that is, the thickness of a plate used for vibration isolating rubber.

Next, while the mat is still in a plastic state, a desired external shape is formed.
That is, for example, as shown in FIG. 2, a circular hole is punched out and a small hole 4 is drilled at the bolt installation position.

3 and 4 show bolts with serrations used in the present invention, 5 is a seat, 6 is a serration part, located between the seat 5 and the threaded part 7, It exhibits an uneven shape in the direction.

Then, the serrated plate Pb with a seat is inserted into the small hole 4 of the gray P shown in FIG. 2 and seated, thereby forming a bolted plate Pb as shown in FIG.

Then, as shown in FIG. 6, the bolted plate Pb is installed at a predetermined position in an injection type vulcanization mold T consisting of an upper mold 10, a middle mold 11, and a lower mold 12, and the material supply port is From 20, unvulcanized rubber is injected into the product cavity 21 under pressure.

After the injection is completed, if the vulcanization mold T is pressurized and heated using a vulcanization press (not shown), the unvulcanized rubber in the product cavity 21 will progress to vulcanization and form a vibration-proof rubber body. At the same time, the epoxy resin plate P which was in a plastic state of the bolted plate Pb is also hardened and adhered to the vibration isolating rubber body, thereby forming a vibration isolating rubber with an epoxy resin plate.

In the above, when unvulcanized rubber is injected from the material supply port 20, it is strongly pressurized, and the injection pressure at this time is generated in the direction of the arrow (Fig. 6), pressing the plate P in the initial plastic state. Therefore, as shown in FIG. 7, the epoxy resin that forms the plate enters into the four parts of the serration part 6 of Pol) B, which are present in large numbers in the radial direction, and as this hardens, it becomes firmly attached to the epoxy resin plate. As a result, the vibration-proof rubber with an epoxy resin grating in which the bolts according to the manufacturing method of the present invention are installed can be put to practical use.

[Brief explanation of drawings]

Figure 1 is a front view showing the shape of the anti-vibration rubber, Figures 2 to 7 are diagrams explaining the present invention, Figure 2 is a plan view of the plate, Figure 3 is a front view of the bolt, Figure 4 shows I- in Figure 3.
■Cross-sectional view, Figure 5 is a cross-sectional view showing the bolt inserted into the plate, Figure 6 is a cross-sectional view explaining the manufacturing state in a vulcanization mold, and Figure 7 is a cross-sectional view of the bolt during manufacturing. It is an enlarged sectional view explaining the state of a serration part. 1... Anti-vibration rubber body, 2... Plate,
3...Bolt, 4...Small hole, 5...
... Seat, 6... Serration section, B...
...Bolt with serration and seat, Poooooo. Plate, Pb...Plate with bolt, 10.
...Top mold, 11...Middle mold, 12...
...Lower mold, T...Vulcanization mold, 20...
...Material supply port, 21...Product cavity.

Claims (1)

[Claims] 1. Punch out the required external shape from an epoxy resin mat in a plasticized state into which reinforcing fiber material such as carbon fiber is mixed, provide /''-fL at the bolt installation position, and attach a serrated seat bolt to said lJ'-fL. A plate with bolts is formed, and the plate is placed in a predetermined position in an injection-type vulcanization mold. At the same time, unvulcanized rubber is injected under pressure into the product cavity, and the vulcanization mold is installed. A method for manufacturing a vibration isolating rubber with an epoxy resin plate, in which bolts are installed that are pressurized and heated.