JPH025566B2 - - Google Patents

Description

[Detailed description of the invention]

Object of the Invention (Industrial Field of Application) The present invention relates to a method of manufacturing a vibration isolating rubber with a metal housing such as a damper pulley. (Prior Art) The conventional art will be explained by taking as an example a method of manufacturing a damper pulley, which is a type of anti-vibration rubber with a metal housing. As shown in FIG. 2, the damper pulley is composed of a pulley rim 1 as an external housing, an inner hub 3 as an internal housing, and a ring-shaped rubber member 6. This damper pulley has the rubber member 6 pressed into the gap between the pulley rim 1 and the inner hub 3,
Furthermore, it is manufactured by fixing the interface between the pulley rim 1 and the rubber member 6 and the interface between the inner hub 3 and the rubber member 6 using an adhesive. The first point to keep in mind when manufacturing this damper pulley is the method of press-fitting the rubber member 6.
That is, the pulley rim 1 and the inner hub 3
Since the gap between the rubber member 6 and the rubber member 6 is approximately 25 to 30% smaller than the wall thickness, the load during press-fitting becomes large. There is a possibility that this may occur. Furthermore, during press-fitting, there is a possibility that the adhesive applied to the surface of the rubber member 6 may be scraped off by the inner peripheral edge of the pulley rim 1 and the outer peripheral edge of the inner hub 3. Therefore, in order to facilitate press-fitting, it is necessary to apply an adhesive to the surface of the rubber member 6 and then further apply a lubricant such as press-fitting fluid. The second thing to keep in mind is the adhesive. In other words, since the damper pulley is used in a high-temperature atmosphere, the rubber member 6 is made of a material with good heat resistance, and the adhesive also has excellent heat resistance and strong adhesion between rubber and metal. The one with the following must be selected. Therefore, research and development of various adhesives that satisfy these conditions are underway. (Problems to be solved by the invention) In the above damper pulley manufacturing method,
Apply adhesive to the surface of the rubber member, then apply a press-fitting liquid and press-fit, or apply primer and adhesive to the pulley rim and inner hub in sequence, and then press-fit to the surface of the rubber member. Various methods have been adopted, such as applying liquid and press-fitting, but the problem is that it is difficult to obtain a press-fitting liquid that has appropriate compatibility with the adhesive and does not impair the adhesive strength of the adhesive. It's summery. In other words, if the compatibility between the adhesive and the injection fluid is low, the press-fitting load when press-fitting the rubber member will be large, making it easy for the rubber member to deform and residual strain to occur, which will cause a decrease in the yield of the product. This is because. Furthermore, if the compatibility between the adhesive and the injection fluid is too good, the adhesive will dissolve in the injection liquid, resulting in an increase in the press-fitting load and a decrease in the effectiveness of the adhesive. . The above-mentioned problems have also been pointed out in other anti-vibration rubbers with metal housings. Therefore, with the aim of solving the above problems, the present inventors have repeatedly researched the compatibility between adhesives and injection fluid, and as a result, they have found that the adhesive has appropriate compatibility with the injection fluid and is compatible with rubber and metal. In contrast, the present inventors discovered a compound with strong adhesion and completed the present invention. Structure of the Invention (Means for Solving the Problems) That is, after applying the puyaimer 12 to predetermined locations of the pair of metal housings 1 and 3, the adhesive 1 is further applied.
In the method of manufacturing a vibration isolating rubber with a metal housing, the rubber member 6 coated with a press-fitting liquid 13 is press-fitted between the metal housings 1 and 3 and bonded. The above problems were solved by using a mixture of a petroleum resin and a polymer-based adhesive. (Function) By using the adhesive of the present invention, the compatibility between the adhesive and the injection liquid becomes appropriate, and the rubber member is press-fitted smoothly, so that deformation and residual strain are less likely to occur. Furthermore, by heating and curing the compound, a crosslinking reaction is formed at the interface with the primer and the rubber base material, which improves the adhesion, especially the adhesion after thermal deterioration. (Example) The above-mentioned adhesive made of a mixture of a petroleum resin and a main adhesive agent mainly composed of a chlorinated polymer will be specifically explained. First, what is the main adhesive agent mainly composed of chlorinated polymers? Chlorine-containing adhesive polymers such as chlorinated rubber, chlorinated polypropylene, chlorinated ethylene-propylene rubber, chlorosulfonated polyethylene, chloroprene rubber, and vinyl chloride elastomer. This is an adhesive with carbon black and a small amount of crosslinking agent added to it. Petroleum resins are mainly composed of aromatic hydrocarbons and polycyclic hydrocarbons made of polymers such as styrene, vinyltoluene, and indene, and have a softening point of 0°C to 120°C and a fixed carbon content of 15 to 30%. adhesive polymer. A suitable blending ratio of these is 10 to 100 parts by weight of petroleum resin per 100 parts by weight of the solid content of the adhesive main agent, and if the petroleum resin exceeds 100 parts by weight, the adhesion strength decreases. To prepare the above adhesive, simply mix the base adhesive and petroleum resin in the above prescribed ratio in a solvent of aromatic hydrocarbons such as toluene or xylene or chlorinated hydrocarbons such as chloroform or carbon tetrachloride. That's fine. Further, the injection fluid is a process oil, and there are various types such as paraffin type, naphthenic type, and aromatic type, and any of them can be used. Next, the rubber parts to which this adhesive is applied are not only natural rubber (NR) but also various synthetic rubbers, such as chlorinated butyl rubber (Cl-11R), chloroprene rubber (CR), and chlorosulfonated polyethylene (CSM). , styrene-butadiene rubber (SBR), nitrile rubber (NBR), ethylene-propylene rubber

【table】

[Table] Thereafter, the ring-shaped rubber member coated with the process oil was press-fitted into the gap between the pulley rim and the inner hub at a press-fitting speed of 100 mm/min. FIG. 1 is a sectional view of the damper pulley showing this state. That is, a primer 12 and an adhesive 11 are sequentially applied to the inner circumferential surface of the pulley rim 1, which is the outer housing, and the outer circumferential surface of the inner hub 3, which is the inner housing, respectively. Further, a rubber member 6 whose surface is coated with process oil as a press-fitting fluid 13 is press-fitted into the gap between the pulley rim 1 and the inner hub 3. When this damper pulley is heated at 150°C for 30 minutes, the process oil 13 is gradually impregnated into the rubber member 6, and as the adhesive 11 hardens, it reacts with the primer 12 and the rubber member 6, and the rubber member 6 is attached to the pulley rim 1. And the inner hub 3 is firmly attached to the inner hub 3. Note that this manufacturing method can also be implemented in the case of other anti-vibration rubbers with metal housings. In order to examine the adhesion between the housing of the damper pulley manufactured by the above method and the rubber member 6, this damper pulley was placed in a constant temperature bath at 120°C for 10 minutes.
The specimens were left to deteriorate by heat for several days, and together with the undegraded specimens, tensile shear tests and failure mode measurements were conducted using an autograph, and the results shown in Tables 2 and 3 were obtained.

【table】

[Table] From the test results in Tables 2 and 3 above, it is clear that by using the adhesive of the above example, it becomes easier to press fit the rubber member 6, and the adhesion between the rubber member 6 and the metal housing deteriorates due to heat. It can be seen that even after this, sufficient strength is maintained. Effects of the Invention As detailed above, the present invention uses an adhesive having appropriate compatibility with the press-fitting liquid in a method of manufacturing a vibration-proof rubber with a metal housing, and the press-fitting of the rubber member is improved. Since this process is easy to perform, it is effective in preventing deformation and residual distortion of the rubber member after press-fitting. Furthermore, by heating and curing this adhesive, a crosslinking reaction is formed at the interface with the primer and the rubber member, which also has the effect of improving adhesion, especially adhesion after thermal deterioration.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the damper pulley showing the state after the rubber member has been press-fitted, and FIG. 2 is an exploded perspective view showing the structure of the damper pulley. DESCRIPTION OF SYMBOLS 1... Pulley rim, 3... Inner hub, 6... Rubber member, 11... Adhesive.

Claims (1)

[Claims] 1. After applying a primer 12 to a predetermined location of a pair of metal housings 1 and 3, an adhesive 11 is further applied, and a rubber member 6 is coated with a press-fitting fluid 13 between the metal housings 1 and 3. A method for producing a vibration isolating rubber with a metal housing, characterized in that the adhesive 11 is a mixture of a main adhesive agent mainly composed of a chlorinated polymer and a petroleum resin. 2. The metal according to claim 1, wherein the adhesive 11 has a solid content of a main adhesive mainly composed of a chlorinated polymer/petroleum resin=100 parts by weight/10 to 100 parts by weight. Manufacturing method of vibration-proof rubber with housing. 3. The method of manufacturing a vibration isolating rubber with a metal housing according to claim 1 or 2, wherein the primer 12 is mainly composed of phenolic resin.