JP3268812B2 - Metal / rubber composite vibration isolator and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a composite body in which a metal holding member and a vibration-proof rubber body are integrated, and is used as a vibration-proof body for automobiles, such as a mount for an engine or a bush for a suspension link, or The present invention relates to a metal / rubber composite vibration insulator used as a vibration insulator for supporting various industrial machines.

[0002]

2. Description of the Related Art Generally, a metal-rubber composite vibration isolator of this type is formed by bonding a metal holding member and a vibration isolating rubber body to each other via various adhesives. In this case, the holding member is usually formed of a steel material, and the holding member coated with the adhesive is disposed in a mold, and an unvulcanized rubber is poured into the mold and integrally vulcanized and bonded. It is manufactured by Conventionally, in order to improve the corrosion resistance while maintaining the adhesive strength, there has been known one in which a resin-based cationic electrodeposition coating is applied to the holding member before the integral vulcanization bonding (for example, Japanese Patent Publication No. 59-51905, JP-A-62-24042).

On the other hand, when such a metal / rubber composite vibration isolator is a rubber bush provided in a shaft support holding hole of a link rod of an automobile suspension, the inner and outer cylinders serving as holding members are connected to each other. After integrally molding the anti-vibration rubber body by integral vulcanization and bonding, the outer cylinder is reduced in diameter and mounted in the holding hole, which is disadvantageous in that the number of steps is relatively large. For this reason, conventionally, first, after manufacturing only the inner cylinder and the vibration-proof rubber body by integral vulcanization bonding,
This vibration-proof rubber body is pressed into the holding hole at the end of the link rod, and the inner peripheral surface of the holding hole and the outer peripheral surface of the vibration-proof rubber body are bonded via an adhesive. That is, post-vulcanization bonding is performed, in which the link rod itself constituting the holding hole is used as an outer cylinder portion, and the vibration-proof rubber body after vulcanization molding is bonded to the outer cylinder portion via an adhesive. .

[0004]

In recent years, in such a metal / rubber composite vibration isolator, the use of a non-ferrous metal such as aluminum has been required for metal parts such as a holding member due to a demand for weight reduction.

However, when the holding member is formed of a non-ferrous metal such as aluminum, the post-vulcanization bonding between the aluminum background and the vibration-proof rubber body after vulcanization is difficult. In order to perform the coating sufficiently, it is necessary to apply a resin-based cationic electrodeposition coating to the surface of the aluminum holding member. When the electrode rod is coated by electrodeposition, unnecessary portions are also coated by electrodeposition, so that there is a problem that the quality becomes excessive and the cost and weight increase.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a non-ferrous metal holding member and a vibration-proof rubber body without performing resin-based cationic electrodeposition coating. The purpose of this is to make the bonding firm.

[0007]

In order to achieve the above-mentioned object, the invention according to claim 1 is directed to a structure in which an adhesive surface on a metal holding member side and an adhesive surface on a vibration isolating rubber body are bonded to each other. It is assumed that the holding member is made of a non-ferrous metal.
The undercoat film layer of a phenolic adhesive covering the surface of the holding member and the overcoat film layer of a chlorinated rubber adhesive covering the surface of the undercoat film layer are thermally cured to form an adhesive layer on the holding member side. It is formed so as to be fixed to the surface of the holding member. On the other hand, the bonding surface on the vibration-proof rubber body side is formed in a state where the surface of the vibration-proof rubber body has been activated. And
The bonding surface on the holding member side and the bonding surface on the vibration isolating rubber body side,
It is configured to be adhered to each other via a coating layer of an isocyanate-based adhesive.

According to a second aspect of the present invention, a method for manufacturing a metal / rubber composite vibration isolator according to the first aspect includes the following first to third steps. First
In the process, a phenolic adhesive is undercoated on the surface of the holding member facing the vibration-proof rubber body, and a chlorinated rubber-based adhesive is overcoated on the surface of the undercoat film, and then the coating films of both adhesives are thermally cured. Thus, the bonding surface on the holding member side is formed.
In the second step, separately from the first step, an activation process is performed on the surface of the vibration-proof rubber body facing the holding member to form an adhesive surface on the vibration-proof rubber body side. And the third
In the step, an isocyanate-based adhesive is applied to one or both of the bonding surface on the holding member side and the bonding surface on the vibration-isolating rubber body formed in the first and second steps. The isocyanate-based adhesive is heat-cured while the bonding surfaces are joined.

[0009]

According to the above-mentioned structure, according to the first aspect of the present invention,
On the surface of the holding member made of non-ferrous metal, two adhesive layers, an undercoat film layer made of a phenolic adhesive and an overcoat film layer made of a chlorinated rubber adhesive, were hardened and firmly adhered to the surface of the holding member. In this state, the bonding surface on the holding member side is formed, and the bonding surface on the vibration-proof rubber body is formed in an activated state. And since both bonding surfaces are bonded via the layer of the isocyanate-based adhesive, even if the holding member is formed of a non-ferrous metal, the holding member and the vibration isolating rubber body are firmly bonded to each other. You.

According to a second aspect of the present invention, there is provided the method for manufacturing a metal / rubber composite vibration isolator according to the first aspect, wherein the first step is firmly fixed to the surface of the holding member by the first step. A coating layer composed of the undercoat film layer and the overcoat film layer thus formed is formed, and an adhesive surface on the holding member side is formed. on the other hand,
In the second step, the surface of the vibration-isolating rubber body is activated to form an adhesive surface on the vibration-isolating rubber body side. Then, in the third step, the two bonding surfaces are bonded via the isocyanate-based adhesive and are thermoset, so that the coating layer and the vibration-proof rubber body are integrated. At this time, the isocyanate-based adhesive has a relatively strong wettability to the adherend and the bonding surface is continuous, and the bonding surface on the holding member side is made of a chlorinated rubber-based adhesive instead of a non-ferrous metal background. Layer, the isocyanate-based adhesive is dissolved in the vulcanized rubber of the vibration-isolating rubber body to form a chemical bond, and also forms a chemical bond with the coating layer, so that the two bonding surfaces are firmly bonded. Glued.

[0011]

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

FIG. 1 shows a first embodiment in which the metal / rubber composite vibration isolator of the present invention is applied to an engine mount of an automobile. Reference numeral 1 denotes a cylindrical vibration isolator, and reference numerals 2 and 2 denote this rubber isolator. The holding members are bonded to both ends of the body 1.

The vibration-proof rubber body 1 is formed by vulcanizing natural rubber (NR) or various synthetic rubbers into a predetermined shape in advance. Examples of the synthetic rubber include a blend of natural rubber and styrene butadiene rubber (NR / SBR) or a blend of natural rubber and butadiene rubber (NR / SBR).
BR) and the like.

Each of the holding members 2 is formed of a non-ferrous metal such as aluminum or an aluminum alloy in a plate shape, and connection bolts 3 projecting in opposite directions are fixed thereto. Examples of the aluminum alloy include an Al-Mg alloy (A5 in JIS H4000).
000), Al-Mg-Si alloy (A6000
Alloy) or an Al-Zn-Mg alloy (A7000)
System) is used as preferred. The connecting bolts 3 connect the mounting brackets 4 and 5 on the engine side or the vehicle body side.

As shown in detail in FIG. 2, the vibration-isolating rubber body 1 and each holding member 2 are made of three adhesive film layers 6, 7, and 8.
Are fixed to each other via a. That is, the undercoat film layer 6 of the phenolic adhesive covering the surface 2a of each of the holding members 2 and the overcoat film layer 7 of the chlorinated rubber adhesive covering the surface of the undercoat film layer 6 are thermally cured. The bonding surface 2b on the side of each of the holding members 2 is formed in a state of being fixed to the surface 2a, while each end surface 1 of the vibration-proof rubber body 1 is formed.
a is activated and the adhesive surface 1b on the vibration isolating rubber body 1 side
Are formed. The two bonding surfaces 2b, 1b are bonded via a coating layer 8 made of an isocyanate-based adhesive.

In the engine mount having such a configuration, a first step of forming the bonding surface 2b of each of the holding members 2 and a second step of forming the bonding surface 1b of the vibration-proof rubber body 1 separately from the first step. After two steps, and after the first and second steps, a third step of bonding the two bonding surfaces 2b, 1b to each other, the pair of holding members 2, 2 and the vibration-proof rubber body 1 are combined with each other. Manufactured.

The first step comprises a chemical conversion treatment of each holding member 2, formation of an undercoat film layer 6, formation of an overcoat film layer 7, and baking of each of the film layers 6, 7. The above-mentioned chemical conversion treatment is performed by immersing in a 60 ° C. solution obtained by adding NaOH to a weak alkali degreasing agent for 5 minutes to perform alkali etching, and after washing with water,
Neutralize at room temperature for 30-60 seconds in dilute nitric acid. And
After washing with water at room temperature for 1 to 2 minutes, it is dried. The undercoat film layer 6 is formed by applying a phenolic adhesive such as Chemloc 205 (trade name of Huson Chemical Co., USA) to the surface 2a of each of the holding members 2 and then drying it at 70 ° C. for 5 minutes. The overcoat film layer 7 is formed by applying a chlorinated rubber-based adhesive such as Chemlock 220 (trade name of Huson Chemical Co., USA) to the surface of the undercoat film layer 6 and then drying at 70 ° C. for 5 minutes. Then, both film layers 6 and 7 are
By baking at 20 ° C. for 20 minutes, the bonding surface 1 b on each holding member 2 side is formed.

In the second step, an end surface 1a of the vibration isolating rubber body 1 is activated to form an adhesive surface 1b on the vibration isolating rubber body 1 side. In this activation treatment, the surface of the vulcanized rubber is activated by an organic acid, an inorganic acid or a physical treatment. The surface of the vulcanized rubber is subjected to a halogenation treatment, a nitration treatment, a cyclization treatment, and a methylene iodide treatment. Alternatively, it is appropriately selected from plasma processing and the like.

In the case of the halogenation treatment, halogenated isocyanuric acid, halogenated succinimide,
From among halogenated isocyanate, N-halogensulfonamide or halogenated hydantoin, etc., a halogenating agent is used as an inorganic acid from hydrochloric acid, hypochlorous acid, sodium hypochlorite, iodine chloride or iodine bromide. select. Among them, iodide isocyanate, dichloroisocyanuric acid, trichloroisocyanuric acid or N-dichloro-P-toluenesulfonamide has surface treatment performance,
It is suitable in terms of processing safety and processing speed. The selected halogenating agent is dissolved in a suitable organic solvent and diluted to a concentration of 0.1 to 30%, preferably 1 to 20% to obtain a halogenated solution. As the organic solvent, toluene, xylene, isooctane, dimethyl ether, ethyl acetate, methyl ethyl ketone, carbon tetrachloride, industrial thinner, or the like may be used. Then, after defatting each end surface 1a of the vibration-isolating rubber body 1 which is a vulcanized rubber, the end surface 1a is immersed in the halogenated solution or sprayed or applied with the halogenated solution for a relatively short time (for example, 2, (3 seconds to 3 minutes). In this case, rinsing of the surface is often not necessary.

In the case of the above-mentioned nitration treatment, a nitrating agent is selected from iodine nitrate, iodine azide, bromine azide, nitric acid or mixed acid. Then, a low-concentration nitrating solution is applied to each end face 1a of the vibration-proof rubber body 1 for a short time,
Thereafter, the application surface is sufficiently washed with water. In the case of this nitration treatment, since the reactivity is relatively large, it is necessary to perform the treatment in a sufficient safety facility.

In the case of the above cyclization treatment, a concentrated sulfuric acid solution is used as a cyclization treatment solution, and each end face 1a of the vibration damping rubber body 1 is immersed or coated in the cyclization treatment solution at room temperature for 2 to 20 minutes. Thereafter, the attached concentrated sulfuric acid is washed off with water.

In the case of the above-mentioned methylene iodide treatment, methylene iodide is dissolved in an appropriate solvent to form 0.1 to 10%
To a methylene iodide-treated solution, and this solution is applied to the surface 1a of the rubber vibration insulator 1.

Further, in the case of the plasma treatment, 100 to 60,000 Wsec / l is applied to each end face 1a of the vibration-proof rubber body 1.
Of low temperature plasma.

In the third step, an isocyanate-based adhesive such as a urethane-based bond is applied to each of the adhesive surfaces 1b on the vibration-isolating rubber body 1 formed in the second step. Pressing the bonding surface 2b of each holding member 2;
20 minutes to 24 hours at a temperature of 20 to 150 ° C. while pressing
Allow time to cure. Thereby, the coating layer 8 of the isocyanate-based adhesive is formed, and the above-described holding members 2 and the vibration-proof rubber body 1 can be combined.

In the case of the engine mount compounded in this way, even if each holding member 2 is formed of a non-ferrous metal such as an aluminum alloy, it is a vulcanized rubber without being subjected to cationic electrodeposition coating. It can be firmly bonded to the vibration-proof rubber body 1. That is, instead of directly bonding the vibration-isolating rubber body 1 to the surface of each holding member 2 made of an aluminum alloy via an isocyanate-based adhesive, the above-described respective layers are formed by the undercoat film layer 6 and the overcoat film layer 7 which are cured by heat. The holding member 2 is covered, and the bonding surface 2
This is because b and the bonding surface 1b of the vibration-proof rubber body 1 are bonded to each other by the isocyanate-based adhesive. In this case, the undercoat film layer 6 is a phenolic adhesive,
In addition, since the overcoat film layer 7 is a chlorinated rubber-based adhesive, the two coating film layers 6 and 7 can be firmly fixed to the surface 2a of each of the holding members 2. Moreover, the isocyanate-based adhesive has a relatively strong wettability, and the adhesive surface 1
b, 2b, the adhesive film is continuous, and the isocyanate-based adhesive forms a chemical bond with the bonding surface 2b of each holding member 2 formed by the chlorinated rubber-based adhesive; and Since the chemical bonding is formed by dissolving in the rubber of each bonding surface 1b on the vibration-proof rubber body 1 side on which the activation treatment is performed, each holding member 2 can be firmly bonded to the vibration-proof rubber body 1. .

FIGS. 3 and 4 show a second embodiment in which the metal / rubber composite vibration insulator of the present invention is applied to a rubber bush.
9 is an inner cylinder which is one holding member, and 10 is this inner cylinder 9
Reference numeral 11 denotes a link rod main body which is vulcanized and bonded to the outer peripheral surface of the vehicle body, and 11 is a link rod body which forms a part of a vehicle suspension by post-vulcanizing bonding of the outer peripheral surface of the vibration-proof rubber body 10.

The inner cylinder 9 and the link rod body 11
Are the holding members 2 of the engine mount of the first embodiment.
Similarly to the above, it is made of a non-ferrous metal, especially aluminum or an aluminum alloy, and is connected to a vibration source and the like by connecting bolts (not shown) inserted in the inner cylinder 9. Further, the vibration-proof rubber body 10 is made of natural rubber or various synthetic rubbers, similarly to the vibration-proof rubber body 1 of the engine mount of the first embodiment.

The link rod body 11 has a pair of bulges 11a at both ends (only one end is shown in FIGS. 3 and 4).
Each of the bulging portions 11a is provided with a holding hole 12 penetrating in a direction orthogonal to the longitudinal axis direction of the link rod body 11. The bulging portions 11a constituting the inner peripheral surface 12a of each holding hole 12 constitute an outer cylindrical portion which is the other holding member in the rubber bush of the second embodiment. Hereinafter, the description will be given of the rubber bush on one end side of the link rod body 11.

As shown in detail in FIG. 5, the vibration-isolating rubber body 10 and the inner peripheral surface 12a of the holding hole 12 are fixed to each other through three adhesive film layers 13, 14, 15. I have.
That is, the undercoat film layer 13 of the phenolic adhesive covering the inner peripheral surface 12a of the holding hole 12 and the overcoat film layer 14 of the chlorinated rubber adhesive covering the surface of the undercoat film layer 13 are thermally cured. The adhesive surface 12b on the side of the holding hole 12 is formed in a state of being fixed to the inner peripheral surface 12a, while the outer peripheral surface 10a of the vibration isolating rubber body 10 is activated and An adhesive surface 10b is formed. The two bonding surfaces 12b and 10b are bonded via a coating layer 15 made of an isocyanate-based adhesive.

The rubber bush having such a structure is provided with an adhesive surface 12a on the inner peripheral surface 12a of the holding hole 12 of the bulging portion 11a.
b) a second step of forming and vulcanizing the anti-vibration rubber body 10 separately from the inner cylindrical body 9 by vulcanization molding, and after the second step, A third step of forming an adhesive surface 10b on the outer peripheral surface 10a of the vibration-isolating rubber body 10;
Process and after these first to third processes, the two adhesive surfaces 12
Through the fourth step of bonding b and 10b to each other, the inner cylindrical body 9, the vibration-proof rubber body 10, and the bulging portion 11a are manufactured by being combined with each other.

The first step includes a chemical conversion treatment of the bulging portion 11 a including the holding hole 12, formation of the undercoat film layer 13, formation of the overcoat film layer 14, and baking of each of the film layers 13, 14. Become. The chemical conversion treatment, the formation of the undercoat film layer 13, the formation of the overcoat film layer 14, and the baking are performed in the first step of the first embodiment in which the chemical conversion treatment, the formation of the undercoat film layer 6, and the overcoat film layer 7 are performed.
In the same manner as the formation and baking of the bulging portion 11a.
Side adhesive surface 12b is formed.

In the second step, an unvulcanized rubber is poured in a state in which the inner cylinder 9 is placed in a predetermined mold, and vulcanization molding is performed, whereby the inner cylinder 9 is vulcanized and bonded to the outer peripheral surface of the inner cylinder 9. In this state, the anti-vibration rubber body 10 is integrally vulcanized.

In the third step, the outer peripheral surface 10a of the vibration-isolating rubber body 10 is activated, so that the vibration-isolating rubber body 1 is activated.
The 0-side bonding surface 10b is formed. In this activation treatment, halogenation treatment or the like is performed in the same manner as in the activation treatment of the vibration isolating rubber body 1 in the second step in the first embodiment.

In the fourth step, an isocyanate-based adhesive such as a urethane-based bond is applied to the adhesive surface 10b on the vibration-isolating rubber body 10 formed in the third step. In the first step, the adhesive surface 12b is press-fitted into the holding hole 12 in which the adhesive surface 12b is formed and compressed inward in the radial direction, and the isocyanate-based adhesive is heated at 20 to 150 ° C. while the elastic restoring force is applied. Cure at temperature for 20 minutes to 24 hours. As a result, the coating layer 15 of the isocyanate-based adhesive is formed, and the inner cylinder 9 and the vibration-proof rubber body 1 are formed.
0 and the bulging portion 11a can be combined.

In the case of the rubber bush thus compounded, as in the first embodiment, even if the bulging portion 11a as the holding member is formed of a non-ferrous metal such as an aluminum alloy, It can be firmly bonded to the anti-vibration rubber body 10 which is a vulcanized rubber without performing electrodeposition coating. That is, instead of directly bonding the vibration-isolating rubber body 10 to the ground of the bulging portion 11a made of an aluminum alloy via an isocyanate-based adhesive, the above-mentioned holding is performed by the undercoat film layer 13 and the overcoat film layer 14 which are thermoset. Hole 1
This is because the inner peripheral surface 12a is covered with the adhesive surface 12b, which is the surface of the coating layer, and the adhesive surface 10b of the vibration isolating rubber body 10 is adhered to each other by the isocyanate-based adhesive. In this case, since the undercoat film layer 13 is a phenol-based adhesive and the overcoat film layer 14 is a chlorinated rubber-based adhesive, both the coating film layers 13 and 14 are connected to the holding holes 12.
Can be firmly fixed to the inner peripheral surface 12a. In addition, the isocyanate-based adhesive has a relatively high wettability, an adhesive film is continuous between the adhesive surfaces 10b and 12b, and the swelling portion 11a formed by the chlorinated rubber-based adhesive is used. Adhesive surface 10b on the side of vibration-proof rubber body 10 that has formed a chemical bond with adhesive surface 12b and has been activated
Dissolves in the rubber to form a chemical bond, so that the vibration-proof rubber body 10 can be firmly bonded to the bulging portion 11a.

In order to confirm the above effects, four types of rubber bushes having variously changed adhesives forming the adhesive surface on the bulging portion 11a side, that is, the adhesive surface on the inner peripheral surface 12a side of the holding hole 12 were used. A comparative test in which a load in the axial direction of the cylinder was applied to the inner cylinder 9 until the rubber bush was broken was performed using the comparative example of Example 2 and the second example. Then, the load strength at the time of punching, the rupture location and the ratio thereof were measured. Table 1 shows the results.

[0037]

[Table 1]

According to Table 1, in the case of this embodiment, 100% of the vibration-proof rubber body 10 was broken, and the adhesive surfaces 10b, 12b
In this case, no peeling occurs, indicating that the degree of adhesion is greater than the breaking strength of the vulcanized rubber itself of the vibration-isolating rubber body 10. In addition, in the case of Comparative Examples 1 to 4, 50 to 85% of the peeling occurred between the inner peripheral surface 12a of the holding hole 12 and the coating layer 15, and the breaking strength of the layer by these adhesives was low. This shows that the breaking strength of the vulcanized rubber itself is equal to or smaller than the breaking strength.

It should be noted that the present invention is not limited to the above-described first and second embodiments, but includes various other modifications. That is, in the first and second embodiments, the isocyanate-based adhesive is applied to the side of the vibration-isolating rubber bodies 1 and 10.
It may be applied to the side of a, or may be applied to both sides.

In the first and second embodiments, the holding members 2, 11a and the like are formed of an aluminum alloy. However, the invention is not limited to this, and the holding members 2 and 11a may be formed of a non-ferrous metal, such as magnesium. .

In the first and second embodiments, only the chemical conversion treatment is performed before the formation of the undercoat film layers 6, 13 on the holding members 2, 11a with the phenolic adhesive.
However, the invention is not limited to this, and after the chemical conversion treatment, for example, a zinc phosphate film, a non-chromium film, a chromate film, or the like may be formed. In this case, the corrosion resistance can be further improved.

Further, in the second embodiment, the link rod body 11 is formed integrally with the bulging portion 11a. However, the present invention is not limited to this. For example, the link rod body may be formed of a rod part and both ends of the rod part. It may be divided into three parts, a pair of bulges, separately manufactured, and integrally formed by welding. In this case, A700 as defined in JIS
By using a zero-type aluminum alloy, a decrease in welding strength can be suppressed.

[0043]

As described above, according to the metal / rubber composite vibration isolator according to the first aspect of the present invention, the surface of the holding member made of a non-ferrous metal, the undercoat film layer made of a phenolic adhesive, and the The adhesive surface on the holding member side is formed in a state in which the overcoat film layer with the adhesive and the two adhesive layers are firmly fixed to each other, while the adhesive surface on the vibration-proof rubber body is formed in an activated state. Since both bonding surfaces are bonded via a layer of an isocyanate-based adhesive, even if the holding member is formed of a non-ferrous metal, the non-ferrous metal holding member and the vibration-proof rubber body are bonded to each other. Can be performed firmly, and the resin-based cationic electrodeposition coating on the holding member, which is conventionally required, can be omitted.

According to the second aspect of the present invention, the metal / rubber composite vibration isolator according to the first aspect of the present invention can be reliably manufactured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged view of a bonding portion of FIG.

FIG. 3 is a longitudinal sectional view of a second embodiment.

FIG. 4 is a cross-sectional view taken along line AA of FIG.

FIG. 5 is an enlarged view of a bonding portion in FIG. 4;

[Explanation of symbols]

 1,10 Anti-vibration rubber body 1a End face (surface of anti-vibration rubber body) 1b, 10b Adhesion surface on vibration-isolation rubber body 2 Holding member 2a Surface of holding member 2b Adhesion surface of holding member 6,13 Undercoat film layer 7,14 Topcoat film layer 8, 15 Coating layer (isocyanate-based adhesive layer) 9 Inner cylinder (holding member) 10a Outer peripheral surface (surface of anti-vibration rubber body) 11a Swelling portion (holding member) 12a Inside holding hole Peripheral surface (surface of holding member) 12b Adhesive surface on bulging portion side (adhesive surface on holding member side)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI // B29K 21:00 B29K 21:00 C08L 21:00 C08L 21:00 (56) References JP-A-4-202233 (JP, A) JP-A-2-63733 (JP, A) JP-A-3-297637 (JP, A) JP-A-3-41177 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) C08J 5/12 B29C 65/48-65/54 B32B 7/12 B32B 15/06

Claims (2)

(57) [Claims] 1. A metal / rubber composite vibration isolator in which a bonding surface on a metal holding member side and a bonding surface on a vibration isolating rubber body side are bonded to each other, wherein the holding member is formed of a non-ferrous metal. The adhesive surface on the holding member side is formed by thermally curing an undercoat film layer of a phenolic adhesive covering the surface of the holding member and an overcoat film layer of a chlorinated rubber adhesive covering the surface of the undercoat film layer. On the other hand, the adhesive surface on the vibration-isolating rubber body side is formed in a state where the surface of the vibration-isolating rubber body is activated, and the bonding surface on the holding member side is formed. The bonding surface and the bonding surface on the vibration-isolating rubber body side
A metal / rubber composite vibration isolator which is bonded to each other via a coating layer of an isocyanate-based adhesive. 2. A method of manufacturing a metal / rubber composite vibration isolator in which a non-ferrous metal holding member and a vibration isolating rubber body are bonded to each other and integrated, wherein the holding member opposing the vibration isolating rubber body. Is coated with a phenolic adhesive and the surface of the undercoat film is overcoated with a chlorinated rubber adhesive, and then the coating films of both adhesives are heat-cured to form an adhesive surface on the holding member side. A second step of performing an activation treatment on the surface of the vibration-isolating rubber body facing the holding member to form an adhesive surface on the vibration-isolating rubber body side, separately from the first step; After applying an isocyanate-based adhesive to one or both of the adhesive surface on the holding member side and the adhesive surface on the vibration-isolating rubber body formed in the step and the second step,
A third step of thermally curing the isocyanate-based adhesive in a state where the two adhesive surfaces are joined to each other, the method comprising the steps of: