JPS6388339A - Manufacture of resin compound vibration-proof rubber - Google Patents

Abstract

PURPOSE:To improve damping characteristic through shaping firmly into one body by sticking the respective joining-surfaces of a fixture and a resin formative body and a rubber elastic body through, at least, the vulcanization-simultaneous-adhesive of a phenol resin strain or halogenated polymer strain. CONSTITUTION:For instance, as for a cylindrical rubber bush constituting a part of a suspension for an automobile, a fixture 2 made of carbon steel is treated with alkaline degreasing and then acid derusting and then is given a chemical conversion treatment forming a phosphoric acid zinc coat and then is, on the outer perimeter surface, undercoated with the adhesive of a phenol resin strain and finish-coated with the adhesive of a halogenated polymer strain. Also, an inner cylinder resin formative body 2 made of nylon 6 is degresased with a solvent and then is immersed in a cyanuryl chloride acid solution and is chlorinated and is spread on its whole surface with the adhesive of a halogenated polymer strain. And, when is made up of the inner cylinder resin formative body 2 put on the fixture 1 is inserted into a rubber vulcanization mold, and then the unvulcanized substance of a rubber elatstic body 3 is injected and is vulcanize-formed. Thus, such a hindrance as a border-surface adhesion-peeling off or the like does not occur and a favorable damping characteristic can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a resin composite anti-vibration rubber comprising a mounting fitting, a resin molded body, and a rubber elastic body.

<Prior Art> Anti-vibration rubber is used in many structures such as automobiles to provide anti-vibration support for machines that generate vibrations, or to absorb external vibrations and shocks. Conventionally, such anti-vibration rubber consists of a metal molded body with mounting fittings such as pipes and bolts welded together with a rubber elastic body, and a manufacturing method involves bonding and combining these parts during or after vulcanization of the rubber elastic body. was common.

<Problems to be Solved by the Invention> However, in recent years, in anti-vibration rubber for automobiles, etc., there is a strong demand for metal parts to be made of resin from the viewpoint of weight reduction and improvement of corrosion resistance. It is also known that resin has a higher damping rate than metal and has the effect of improving the function of vibration-proof rubber. However, if the entire metal part is made of resin, problems arise such as the tightening strength of bolts and other mounting parts and the strength decreasing in high-temperature atmospheres. One possible solution to this problem is to make the mounting part metal and the other parts resin, but it is difficult to firmly bond the metal part and resin part, and so far, uncured fiber-reinforced epoxy has been used. There is a proposal to install bolts with serrations in the resin, and when the rubber is vulcanized, the resin infiltrates the serration grooves and hardens to fit together (Japanese Patent Publication No. 59-40613), but this proposal does not allow the uncured resin to be inserted into the rubber. Because it is inserted into a vulcanization mold, the shape is severely restricted, and problems such as the resin flowing and deforming due to the injection pressure of the rubber occur, and the adhesive strength between the metal fittings, resin, and rubber is not sufficient. , it is difficult to put it into practical use.

<Means for Solving the Problems> The present invention is a novel method for manufacturing a resin composite anti-vibration rubber that eliminates the above-mentioned drawbacks. When manufacturing a vibration-proof rubber made by combining a resin molded body made of a plastic resin and a rubber elastic body, each joint surface is bonded with a rubber elastic body through at least a phenol resin-based or halogenated polymer-based vulcanization adhesive. Seven pieces are made using a manufacturing method that involves adhering the body at the same time as it is vulcanized.

The second feature is that, at least at the joint surface between the mounting bracket and the resin composite, unvulcanized rubber or unvulcanized rubber having the same or similar composition as the rubber elastic body is applied on one or both of the vulcanization and simultaneous adhesives. via its lysate.

The third feature is that a part of the mounting bracket is directly connected to the elastic body of the rubber 11.

The resin molded article in the present invention is one obtained by curing and molding a thermosetting resin and its reinforced material, or a thermoplastic resin and its reinforced material, and the type of resin is not particularly limited. Considering strength, heat resistance, etc., thermosetting resins are reinforced materials such as unsaturated polyester resins, epoxy resins, and polyimide resins, while thermoplastic resins are polyolefin resins, polyamide resins, polyester resins, modified PPO resins, and polyacetal resins. Resins that are usually called engineering plastics and their reinforced products, and resins that are called super engineering plastics such as polyarylate resins, polyethersulfone resins, polysulfone resins, polyphenylene sulfide resins, polyamideimide resins, and polyetheretherketone resins. and its enhancements are suitable.

Examples of reinforcing members constituting the reinforcement include glass fibers, carbon I fibers, and inorganic fillers, either singly or in combination.

The resin molded body may be formed by any method such as cutting a preformed plate or pipe material, sheet molding, or injection molding.

The mounting hardware is made of metals such as iron, aluminum, tin, and alloys thereof, and may be in the form of bolts, pipes, plates with holes, or variously processed, with zinc phosphate coating on the surface, various types of Anti-corrosion treatment such as plating or painting may be applied.

The material of the rubber elastic body is natural rubber, IRlBR,S.
The main component is BR, CR, NBR, EPDM, IIR, etc. or a mixture thereof.

Naturally, vulcanizing agents, fillers and other commonly used compounding agents are included.

An example of a simultaneous vulcanization adhesion method between rubber and metal is NBR.
It is known to use a phenol resin adhesive in the case of , and to use a halogenated polymer adhesive as an overcoat adhesive in the case of other diene rubbers.

As a result of various experimental studies, we have found that methods for simultaneously vulcanizing and adhering rubber and resin moldings include, for example, polyamide resins, unsaturated polyester resin cured products, epoxy resin cured products, etc., with no treatment or with halogenation treatment, and polyolefin resins.

Fluorine-based resins can be firmly bonded by plasma treatment, and other resins can be firmly bonded by using the above-mentioned pre-treatments or by applying a specific primer, using a halogenated polymer adhesive or a known simultaneous vulcanization adhesive between Go 11 and metal. I found out that it is possible. For adhesion of resin molded bodies and metals, the same treatment as for adhesion with rubber is performed, and at least a phenolic adhesive or a halogenated polymer adhesive is used to prevent voids from forming on the joint surfaces. ↑１
In this case, sufficient adhesion force can be obtained by injecting unvulcanized rubber or by using unvulcanized rubber 11 having the same or similar composition as the rubber elastic body or a melt thereof in advance. I found it.

In the present invention, structural improvements have also been made so that both the mounting bracket (1) and the resin molded body (2) are directly connected to the rubber elastic body (3), as shown in the drawings of later embodiments. Also,
! The metal fittings are designed to compensate for the lower breaking strength and heat resistance than solid metals.

<Function> Not only between the rubber 11 and the resin but also between the metal and the resin can be bonded simultaneously with the vulcanization of the rubber elastic body through at least a phenol resin-based or halogenated polymer-based vulcanization adhesive. The mounting bracket and resin molded body can be firmly integrated.

In addition, at least on the joint surface between the mounting bracket and the resin, unvulcanized rubber with the same or similar composition as the rubber elastic body or its melting may be present in the case of a hoop formation in which the adhesion between the joint surface is insufficient. It also adheres strongly and has sufficient adhesion strength against impact.

Furthermore, by vulcanizing and adhering a part of the mounting bracket directly to the rubber elastic body, the function can be maintained even when the strength of the resin molded body decreases due to heat or the like.

<Example> Hereinafter, an example of the present invention will be described in detail using the drawings.

Example 1 In the cylindrical rubber bushing shown in Fig. 1, the carbon steel mounting bracket (1) was subjected to chemical conversion treatment (after degreasing with alkaline, removing rust with acid, and then forming a zinc phosphate coating). After that, a phenol resin adhesive was applied as an undercoat to the outer peripheral surface, and a halogenated polymer adhesive was applied as a top coat.

Further, after degreasing the inner cylindrical resin molded body (2) made of nylon 6 with a solvent, it was chlorinated by immersing it in a 2% solution of chlorinated cyanuric acid, and a halogenated polymer adhesive was applied to the entire surface thereof. After inserting these into a rubber vulcanization mold, an unvulcanized product of Go-11 elastic body (3) made of sulfur-vulcanized natural rubber was injected and vulcanization molded at a temperature of 160°C. Durability tests were conducted by press-fitting this rubber bushing into an outer cylindrical metal fitting that constitutes a part of an automobile suspension, but no problems such as interfacial adhesive peeling occurred.

Example 2 After degreasing the zinc-plated carbon steel mounting bracket (1) of the rectangular anti-vibration rubber shown in Figures 2 and 3 with a solvent, the adhesive surface was undercoated with a phenolic resin adhesive, and a halogenated polymer adhesive was applied. A top coat of agent was applied.

In addition, after degreasing the resin molded body (2) made of hardened unsaturated polyester SMC with a solvent, a halogenated polymer adhesive is applied to the adhesive surface, and the same compound as the rubber elastic material is applied to the adhesive surface with the mounting bracket. An unvulcanized rubber layer (5) was formed by applying a rubber paste made by dissolving unvulcanized rubber in toluene, and a mounting bracket was attached to the layer (9). After inserting this into a rubber vulcanization mold, an unvulcanized rubber elastic body (3) made of sulfur-vulcanized natural rubber is injected.
Vulcanization molding was carried out at a temperature of 60°C.

When this anti-vibration rubber was tensilely broken, a rubber elastic body (3) was found.
Although it broke from the interface between the mounting bracket (1) and the resin molded body (2), a thin film of rubber elastic material remained on the surfaces of the mounting bracket (1) and the resin molded body (2), and the The adhesive strength was 35 kgf/cm.

Example 3 Figure 4 shows a round anti-vibration rubber with bolts, in which the resin molded body (2) is made of nylon 4 containing 30% by weight of glass w&fiber.
Vulcanization molding was carried out in the same manner as in Example 2, except that the chlorination pretreatment was performed with 6@fat (thickness: 3 mm). When this anti-vibration rubber was tensilely broken, the breaking load was 55 kgf/C:1j, and the rubber elastic body was broken.

<Effects of the Invention> According to the method of the present invention as detailed above, it is possible to firmly bond the joint surfaces of the mounting bracket, the resin molded body, and the rubber elastic body simultaneously with the vulcanization molding of the rubber elastic body. The anti-vibration rubber has improved functions such as damping properties, is light in weight, and is effective in preventing rust.It eliminates problems such as strength deterioration in parts, stress deterioration, and strength deterioration in high-temperature atmospheres, and is compatible with both resin and metal. These features made it possible to create a support device that could be put to practical use.

[Brief explanation of the drawing]

Figures 1 to 4 show vibration isolating rubber manufactured by the method of the present invention, with Figure 1 being a cross-sectional view of the first example, Figure 2 being a plan view of the second example, and Figure 3 being a cross-sectional view of the second example. A-A sectional view in Figure 2, Figure 4 is the 3rd
FIG. 3 is an example cross-sectional view. FIG. 5 is an enlarged cross-sectional view of the joint. (1) Mounting bracket (2) Resin molded body (3) Rubber elastic body (4) Vulcanized adhesive layer (5) Unvulcanized rubber notification or higher

Claims (1)

[Scope of Claims] 1. When manufacturing a vibration-proof rubber made of a composite of a mounting bracket, a resin molded body, and a rubber elastic body, each joint surface is coated with at least a phenol resin-based or halogenated polymer-based vulcanization adhesive. A method for producing a resin composite anti-vibration rubber, characterized in that the resin composite anti-vibration rubber is bonded simultaneously during vulcanization of a rubber elastic body. 2. Claims characterized in that, at least at the joint surface between the mounting bracket and the resin molded body, an unvulcanized rubber or a melt thereof having the same or similar composition to that of the rubber elastic body is used together with a vulcanization adhesive. 2. A method for producing a resin composite anti-vibration rubber according to item 1. 3. The method for manufacturing a resin composite vibration isolator according to claim 1, wherein a part of the mounting fitting is directly joined to the rubber elastic body.