JPH0614097Y2 - Laminated anti-vibration rubber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a laminated anti-vibration rubber formed by alternately laminating a plurality of metal plates and rubber layers.

(Prior Art) Conventionally, as a vibration damping material, as shown in FIG. 3, a disk-shaped metal plate 1 and rubber having a colored chromate plating on the surface and shot blasting or sand blasting to form a hole in the center thereof. A laminated anti-vibration rubber is used in which a plurality of layers 2 are alternately laminated and an upper metal plate 3a and a lower metal plate 3b having the same thickness are arranged on the upper and lower surfaces respectively and integrally molded.

As a method for producing such a laminated type vibration-proof rubber, usually, a plurality of raw rubber plates formed into a perforated disc shape are provided on the lower metal plate 3b while interposing the metal plate 1 of the same shape,
A method is adopted in which a plurality of sheets are laminated, an upper metal plate 3a is placed on the laminated sheet, placed in a mold, and integrally vulcanized while being heated and pressed by a heating press. At the time of vulcanization molding by a press, in order to prevent defective adhesion due to an air layer that has entered between the rubber plate and the metal plate, air is removed from the inside of the mold by a vacuum pump.

(Problems to be solved by the invention) However, in such a method, the air layer between the rubber plate and the metal plate cannot be completely sucked and discharged, and a large number of adhesion defects due to this air layer occur. There was a problem.

The present invention has been made to solve such problems, and it is an object of the present invention to provide a laminated anti-vibration rubber in which the adhesive force between a metal plate and a rubber layer is increased to improve the product yield. And

[Means for Solving the Problem] (Means for Solving the Problem) The laminated anti-vibration rubber of the present invention comprises a disc-shaped metal plate having a hole in the center thereof and a plurality of rubber layers alternately laminated to each other and heated. The laminated vibration-proof rubber formed by pressure molding is characterized in that a plurality of concave grooves are radially formed on the surface of the metal plate in contact with the rubber layer.

In the present invention, the concave groove formed on the surface of the metal plate may have any cross-sectional shape such as a semicircle, a rectangle, a trapezoid, and a triangle. It can be freely set within a range that does not reduce the strength and the vibration damping effect of the entire anti-vibration rubber.

Further, the bottom surface of the groove can be inclined from the central perforated portion of the metal plate so that the depth becomes deeper toward the outer periphery.

(Operation) In the laminated anti-vibration rubber of the present invention, when the rubber layer is vulcanized and molded, the concave grooves radially formed on the surface of the metal plate serve as an air passage, and are formed between the metal plate and the rubber layer. The intervening air layer is easily discharged to the outer circumference of the metal plate.

Therefore, air bubbles do not remain between the vulcanized rubber layer and the metal plate, and the adhesive force between them is increased as compared with the conventional one.

Moreover, since the bonding area between the metal plate and the rubber layer is increased by providing them radially, the adhesive force is also increased by this.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an enlarged vertical sectional view showing an essential part of an embodiment of the present invention.

In the figure, reference numeral 4 denotes a disk-shaped metal plate having a circular hole formed in the center, and both sides of the metal plate 4 are
As shown in FIG. 2, a plurality of concave grooves 5 are formed radially from the central perforated portion toward the outer periphery at equal intervals.

Further, these metal plates 4 and a plurality of rubber layers 6 made of vulcanized rubber having substantially the same shape are alternately laminated so that the rubber layers 6 are formed on both outer sides. On the rubber layer 6, the upper and lower metal plates 7 (though only the upper metal plate is shown in the figure) having a perforated disc shape and having a groove 5 similar to the metal plate 4 formed on only one surface are adhered respectively. ing.

The laminated vibration-damping rubber having such a structure is manufactured by vulcanization molding of the rubber layer 6 by using a device such as a vacuum press, so that a product having high adhesive strength can be manufactured with good yield. That is, when the rubber layer 6 is vulcanized and molded, and the inside of the mold is sucked by using a vacuum pump, an air layer existing at the interface between the metal plate 4 or the upper and lower metal plates 7 and the rubber layer 6 is removed. Through the concave groove 5 formed on the surface of the metal plate, and is discharged to the outer periphery of the metal plate.

Therefore, air bubbles do not remain at the interface between the metal plate and the rubber layer 6, and a laminated vibration-proof rubber in which the metal plate and the rubber layer are firmly bonded can be obtained.

Further, as compared with the conventional case, the adhesion area between the metal plates 4 and 7 and the rubber layer 6 is increased, so that a high adhesion force can be obtained.

[Effects of the Invention] As described above, in the laminated vibration-proof rubber of the present invention, each layer is firmly bonded without any air layer or bubbles remaining between the metal plate and the rubber layer. Therefore, adhesion failure does not occur and the yield is improved.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view showing an essential part of an embodiment of the present invention,
FIG. 2 is a top view of the scissors metal plate used in the embodiment, FIG.
FIG. 1 is a vertical cross-sectional view of a conventional laminated rubber vibration isolator. 1, 4, 7 ... Metal plate 2, 6 ... Rubber layer 5 ... Recessed groove

Claims (1)

[Scope of utility model registration request] 1. A laminated anti-vibration rubber formed by alternately laminating a plurality of disc-shaped metal plates having a hole in the center and a plurality of rubber layers, and heat-pressing the laminated layers. A laminated anti-vibration rubber, wherein a plurality of concave grooves are radially formed on the surface in contact with the laminated anti-vibration rubber.