JP3442858B2 - Bonding method between rubber and rubber - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bonding a vibration-proof rubber to a metal, and more particularly to a vehicle component formed by bonding a vibration-proof rubber and a metal, such as a damper pulley and an engine mount. Can be used in the manufacturing process. 2. Description of the Related Art Conventionally, a solvent-based adhesive made liquid by mixing a solvent such as toluene or xylene and water has been generally used for bonding a vibration-proof rubber to a metal. And usually, metal is subjected to surface treatment such as blasting,
After applying and drying the undercoat adhesive, the topcoat adhesive is further applied and dried, and a vibration-proof rubber is provided and heat-cured to perform adhesion. [0003] However, in the above-mentioned conventional method, undercoating and overcoating and a plurality of adhesives are used, and a step of drying these is required, so that the number of steps is large. In particular, a type in which a vulcanized rubber member such as a damper pulley is press-fitted between metals and then bonded to the metal requires additional application of a press-fitting liquid to press-fit the rubber member. In addition, many of the solvents volatilized in the drying step are harmful to the human body, and there is a problem that the working environment is deteriorated. Accordingly, the present invention provides a method for bonding a vibration-isolating rubber and a metal in a simple process to reduce the manufacturing cost.
Another object is to improve the working environment. A method for solving the above problem will be described with reference to FIG. 1. In the present invention, when bonding the anti-vibration rubber 2 for a vehicle to the metals 1 and 3, an adhesive agent is used. Solvent-free and a gel adhesive at the time of application .
The vibration-proof rubber 2 has an adhesive surface 21 with the metals 1 and 3,
22 is provided with a grain 4 or a recess, and the grain 4 or the recess forms an independent space between the metal 1 and the surface 3 while being pressed against the metal 1 and the surface 3, and is used. It has a shape that can hold a solventless gel adhesive. Therefore, the adhesive surfaces 21, 22 of the anti-vibration rubber 2 side by applying a gel-like adhesive of the solvent-free, allowed holding the solventless adhesive to the embossed 4 or the recess, then, the adhesive The above bonding is achieved by raising the temperature while applying a compressive force to the surface
The agent is cured to perform bonding (claim 1). The non-solvent adhesive is in a gel form, and is applied to the adhesive surfaces 21 and 22 of the vibration damping rubber 2 so that the adhesive covers the adhesive surfaces 21 and 22 and forms Or accumulate in the recess. Since the metals 1 and 3 are overlaid on the bonding surfaces 21 and 22 and held for a predetermined time, the bonding is performed, so that a drying step is unnecessary, and the undercoat adhesive can be omitted. When applied to a damper pulley or the like, the applied adhesive plays a role of a press-fitting liquid, so that no press-fitting liquid is required, and the number of steps can be greatly reduced. Further, even when a compressive force is applied to the adhesive surface for the purpose of improving the adhesiveness, the adhesive is retained in the grain 4 or the concave portion, so that the adhesive does not protrude and the adhesive force is increased. be able to. Next, an embodiment of the present invention will be described. FIG. 1 shows an example in which the method of the present invention is applied to a damper pulley. In FIG. 1 (A), reference numeral 1 denotes a pulley main body made of a metal plate material, which is composed of a central cylindrical boss portion 11, a main body portion 12 extending outward from the outer wall, and a flange 13 rising vertically from the outer periphery of the main body portion 12. . A metal ring-shaped mass body 3 is arranged outside the flange 13, and a ring-shaped anti-vibration rubber 2 is arranged between the ring-shaped mass body 3 and the flange 13. A rotary shaft (not shown) is mounted on the boss portion 11, and the mass body 3 and the vibration-proof rubber 2 constitute a dynamic damper. The vibration damping rubber 2 is a vulcanized rubber made of natural rubber or the like. As shown in FIG. 1B, the inner peripheral surface and the outer peripheral surface are bonding surfaces 21 and 22, respectively. Bonding surface 21,
The surface of the mold 22 is provided with a grain 4 and is formed by subjecting the mold surface to grain processing in advance. It is desirable that the textures 4 formed on the peripheral surfaces 21 and 22 of the vibration-proof rubber 2 are not simply irregularities but have a shape that can sufficiently hold the adhesive applied in the bonding process. That is, it is desirable that the shape in which an independent space is formed between the concave portion of the grain 4 and the metal surface in a state where the convex portion of the grain 4 is pressed against the metal surface. A non-solvent-based adhesive is used as the adhesive used to bond the vibration-proof rubber 2 to the metal part. Specifically, an adhesive component such as an epoxy-based, urethane-based, or acrylic-based resin is used. A gel adhesive mainly composed of The solvent-free gel-like adhesive is applied to the bonding surfaces 21 and 22 of the vibration-isolating rubber 2. Here, a sufficient amount of the gel-like adhesive is applied to the surface of the vibration-isolating rubber 2, especially It is held in the grain 4. Subsequently, the vibration isolating rubber 2 is inserted between the mass body 3 and the flange 13 (FIG. 1).
(C)) The flange 13 is compressed and fixed by expanding the diameter of the flange 13. At this time, the vibration isolating rubber 2
Is compressed, but the adhesive is retained in the grain 4 and does not protrude. Moreover, the rubber 2 is compressed by compression.
And the mass 3 and the flange 13 are in close contact with each other to improve the adhesiveness. Thereafter, the temperature is raised to the curing temperature of the adhesive, and is maintained for a predetermined time until the adhesive is cured. The curing temperature varies depending on the type of the adhesive, but is, for example, about 120 ° C. for a urethane-based adhesive, and a sufficient adhesive strength can be obtained by holding for about 60 minutes. Conventional solvent-based adhesives need to be heated to a temperature close to the vulcanization temperature of the rubber at the time of curing (about 1).
60 ° C.), the rubber material may be re-vulcanized, but the adhesive of the present invention has a relatively low curing temperature as described above, so that re-vulcanization or the like does not occur and rubber characteristics may be reduced. There is no. The non-solvent adhesive used in the present invention is known to have good adhesion to metals, and usually does not require surface treatment of the metal surface. Conventionally, the top coat adhesive is applied after the base coat adhesive is applied. However, in the present invention, the adhesive application step is only required once, and the drying step and the press-in liquid application step are not required. The number can be greatly reduced. When a conventional solvent-based adhesive is applied to the rubber side, the adhesive is cracked by press-fitting, and there is a possibility that the adhesive strength is reduced. Therefore, the conventional solvent-based adhesive is usually applied to the metal side. In the present invention, a gel-like solventless adhesive is used and the grain 4 is provided on the vibration-proof rubber 2, so that a sufficient amount of adhesive can be held on the surface. Therefore, the adhesive can be applied to the vibration isolating rubber 2 without fear of cracking of the adhesive. In the above embodiment, the grain 4 is provided on the bonding surface. However, any shape may be used as long as the adhesive is held on the bonding surface. FIG. 2 shows an example in which the method of the present invention is applied to an engine mount. In the figure, reference numeral 2 denotes a columnar vibration-proof rubber, and metal support members 61 and 62 are joined to upper and lower end surfaces thereof. At the center of the support members 61 and 62, mounting bolts are erected and connected to an engine or a vehicle body (not shown). The upper and lower end surfaces, which are the bonding surfaces of the vibration isolating rubber 2, are recessed leaving an outer peripheral edge, thereby forming a recess 5. When the above-mentioned solvent-free gel adhesive is applied to the upper and lower end surfaces, the adhesive is held in the concave portion 5. In this state, the anti-vibration rubber 2 is arranged in the support members 61 and 62, and is held at a predetermined temperature for a predetermined time to perform bonding. At this time, in order to improve the adhesiveness, it is desirable to apply a constant surface pressure to the adhesive surface. However, the outer peripheral edge of the concave portion 5 serves as a seal portion 51 to prevent the adhesive from protruding. Thus, as in the above-described embodiment, good adhesiveness can be obtained with a simple process. Further, the concave portion 5 may be divided into a plurality of sections, and may have a shape partitioned by a partition. For example, if a structure like a honeycomb is used, the sealing property is further improved, and the holding property of the adhesive can be improved. FIG. 3 shows a third embodiment of the present invention, in which the method of the present invention is applied to an engine mount of another shape. In the figure, an anti-vibration rubber 2 having a substantially rectangular cross section is joined to an inverted U-shaped outer cylinder 71, and an inner cylinder 72 is embedded in the center of the anti-vibration rubber 2. The outer cylinder 71 is bolted to the vehicle body 8 at the opening end bent outward, and the inner cylinder 72 is connected to an engine (not shown). The vibration-proof rubber 2 has an adhesive surface 23 at both ends.
As 24, a grain similar to that of the first embodiment is provided on the entire surface. Then, a solventless gel adhesive is applied to both adhesive surfaces 23 and 24, inserted into the outer cylinder 71, and held at a predetermined temperature for a predetermined time to perform bonding. Here, even if compression is applied to the bonding surface, the bonding agent is not bonded to the bonding surfaces 23, 24.
, The adhesive is suppressed from protruding. Here, the outer cylinder 71 has two semicircular curved side surfaces facing each other, and the curved portions 711 hold both ends of the vibration-proof rubber 2.
Since the anti-vibration rubber 2 is easily deformed, the bonding surface between the anti-vibration rubber 2 and the metal may be displaced. However, the bending portion 711 regulates the anti-vibration rubber 2 until the adhesive hardens. Is securely held. FIG. 4 shows an example in which the method of the present invention is applied to an anti-vibration bush. In the figure, an anti-vibration rubber 2 having a circular cross section is joined in an outer cylinder 91, and an inner cylinder 92 is embedded in the anti-vibration rubber 2. The anti-vibration rubber 2 has an outer peripheral surface 2 which is an adhesive surface.
5 is provided with a grain similar to that of the first embodiment. A solvent-free gel adhesive is applied to the adhesive surface 25, the vibration-proof rubber 2 is inserted into the outer cylinder 91, and the outer cylinder 91 is squeezed and fixed by compression. Next, by holding at a predetermined temperature for a predetermined time, bonding is performed. At this time, since the adhesive is held in the texture of the adhesive surface 25, the protrusion of the adhesive is suppressed. According to the method of the present invention, since a solventless gel adhesive is used, a drying step is not required, and the gel-like adhesive is applied to the adhesive surface of the vibration-proof rubber. By applying the agent, the number of steps can be greatly reduced, for example, a press-in liquid is not required, and the manufacturing cost can be reduced. Moreover, since the grain or the concave portion provided on the bonding surface of the vibration-proof rubber holds the adhesive, there is no possibility that the adhesive will protrude even if a compressive force is applied, and the adhesive force is improved. Furthermore, since the solvent does not evaporate, the working environment can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 (A) is an overall sectional view of a damper pulley to which the method of the present invention is applied, and FIG. 1 (B).
FIG. 1C is a perspective view of an anti-vibration rubber, and FIG. 1C is a diagram illustrating a method of bonding the anti-vibration rubber to a metal part. FIG. 2 is an overall sectional view of an engine mount showing another embodiment of the present invention. FIG. 3 is an overall sectional view of an engine mount showing a third embodiment of the present invention. FIG. 4 is an overall sectional view of an anti-vibration bush according to a fourth embodiment of the present invention. [Description of Signs] 1 Pulley main body 11 Boss part 12 Body part 13 Flange 2 Anti-vibration rubber 21, 22 Adhesive surface 3 Ring-shaped mass body 4 Grain 5 Recess 51 Seal part

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor, Kyoichi Fujinami 1 Ochiai, Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Inside Toyoda Gosei Co., Ltd. (72) Akira Mabuchi 1 Address: Toyoda Gosei Co., Ltd. (72) Inventor Takayoshi Iwata, Aichi Prefecture, Kasuga-machi, Nishi-Kasugai-gun, Ochiai, 1st character Toyoda Gosei Co., Ltd. (72) Inventor Kazuya Ito Kaichi Kasuga-cho, Nishi Kasuga-cho, Aichi Prefecture 1 Ochiai Nagahata Oita, Toyoda Gosei Co., Ltd. Co., Ltd. (72) Inventor Hiroshi Yokoi 1 Kasugacho, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Field synthesis within Co., Ltd. (56) Reference Patent flat 4-325232 (JP, A) JP Akira 60-141533 (JP, A) (58 ) investigated the field (Int.Cl. ^7, DB name) B32B 1 / 00-35/00 B29C 65/00-65/82

Claims (1)

(57) [Claims 1] In a method of bonding a vibration isolating rubber for a vehicle to a metal, a solvent-free adhesive as an adhesive and a gel at the time of coating are used.
In addition to the use of an adhesive in the form of a rubber, the vibration-absorbing rubber is used by forming an independent space between the metal surface and the surface in contact with the metal surface while being pressed against the metal surface. A grain or recess having a shape capable of holding a solvent-based gel adhesive is provided, and the solvent-free gel adhesive is applied to the adhesive surface on the vibration-isolating rubber side. After holding the solvent-based gel adhesive, the adhesive is cured by increasing the temperature while applying compressive force to the adhesive surface.
A method of bonding a vibration-proof rubber and a metal, wherein the bonding is performed.