JPH0527374U - Anticorrosion coating film for automobile leaf springs - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an anticorrosion coating film for a leaf spring, which can easily maintain an effective anticorrosion coating layer, has good adhesion to the leaf spring, and is resistant to rubbing load. [Structure] A zinc rich coating layer 1 applied on the surface of a leaf spring member a, and a rubber primer layer 2 applied thereon.
And a rubber glue layer 3 which is further applied in layers to form a rust preventive coating layer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rust preventive coating film that covers the surface of a leaf spring member that constitutes a leaf spring for an automobile to prevent rust.

[0002]

[Prior Art]

 Conventionally, leaf springs used as cushions for automobiles are constructed by stacking several leaf spring parts with different lengths, but the rust-preventive coating film formed on the surface of the leaf spring members for the purpose of rust prevention is It is formed by applying a zinc rich paint with excellent rust properties by the dipping method.

[0003]

[Problems to be solved by the device]

 However, as described above, the anticorrosion coating film consisting only of zinc-rich coating has excellent anticorrosion properties but lacks the adhesion force against rubbing load. In some cases, the coating film was rubbed and peeled off, so that the coating film peeled off at the mating surfaces of the leaf spring members, and rust often occurred from there.

Further, in the zinc rich coating by dobu pickling, the thickness of the zinc film is likely to vary, and it is difficult to set conditions that are difficult to uniformly form and maintain an effective anticorrosion coating layer, It was necessary to control the process of dipping the paint twice or three times, which led to high costs.

An object of the present invention is to provide a rust-preventive coating film for a leaf spring which can easily maintain an effective rust-preventive coating layer, has good adhesion to the leaf spring, and is resistant to rubbing load.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention uses a zinc coating layer applied on the surface of a leaf spring member, a rubber primer layer applied on top of this, and a rubber glue layer applied on top of this to prevent rust. It is a coating film.

[0007]

[Action]

 According to the above means, the zinc rich coating layer applied to the surface of the leaf spring member covers the metal base with the zinc layer to prevent rusting.

When the rubber primer layer is applied to the surface of the leaf spring member, its solid content is evenly dispersed to form a uniform rubber film, and the rubber primer layer elastically and strongly adheres to the zinc rich coating layer. Further, it acts as an adhesion reinforcing material for the rubber glue layer.

The rubber glue layer strongly adheres to the leaf spring material via the above-mentioned rubber primer layer, and acts as a buffer layer that elastically deforms following a rubbing load. In addition, it has the property of forming a uniform rubber layer by coating in the same manner as the rubber primer when applied.

[0010]

[Effect of the device]

 As described above, the present invention forms a zinc lacquer coating layer having excellent rust prevention properties on the surface of a leaf spring material, and superimposes a rubber primer layer and a rubber glue layer, which are rich in elastic adhesion, on it. Since a rust-preventive coating film is formed, the leaf spring member is covered with the zinc-rich coating layer and both rubber layers to effectively prevent rusting, and both rubber layers follow the rubbing load and are elastic. It is possible to effectively relieve the rubbing load and prevent the peeling by the elastic deformation, so that the coating film of the overlapping portion of the leaf spring member where the rubbing load is generated peels off from the same portion as in the conventional one. Rust does not occur.

Further, the rubber primer layer and the rubber glue layer applied on the zinc rich coating have a high solubility of the solid content, and by applying these, a uniform coating film can be formed. For example, even if the zinc rich coating layer is formed by immersing in rough or the like, it is possible to easily form the rust preventive coating film having good rust preventive property by uniformly forming the rubber layer to be applied thereon. The process management for maintaining an effective anti-corrosion coating film becomes easy, and the cost can be reduced.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The leaf spring shown in FIG. 1 is constructed by stacking several leaf spring members a having different lengths.

As shown in FIG. 2, the leaf spring member a is to be assembled as a leaf spring after the entire surface has been subjected to rust-preventive coating. The rust-preventive coating is performed as shown in the enlarged view of FIG. It is composed of a zinc rich coating layer 1 applied on the surface of the member a, a rubber primer layer 2 applied on it, and a rubber glue layer 3 applied on top of it.

The first zinc-rich coating layer 1 is formed by applying it to the entire surface of the leaf spring member a by dipping. The surface of the leaf spring member a is covered with the zinc rich coating layer 1 with a zinc film, and the zinc film protects the leaf spring member a itself from rust.

The rubber primer layer 2 applied on the zinc rich coating layer 1 is formed by spraying a stock solution of the rubber primer diluted with a solvent. The rubber primer applied to the surface of the leaf spring member a dries as the solvent volatilizes thereafter, and then absorbs moisture in the air and naturally cures.

The rubber primer spray-coated on the leaf spring member a has a property that the solid content is evenly dispersed at the same time as the coating, so that a uniform rubber film is formed after curing. Further, the above-mentioned rubber primer has good adhesion to the metallic material and also has a function as an adhesion reinforcing material for firmly adhering the rubber glue layer 3 to the leaf spring member a.

The rubber glue layer 3 formed on the rubber primer layer 2 is applied by spraying or brush-coating with a solvent diluted like the rubber primer layer 2 described above. The applied rubber paste is naturally vulcanized and firmly adhered to the leaf spring member a via the rubber primer layer 2 described above.

As described above, the leaf spring member a coated with the rust preventive material is assembled as a leaf spring by stacking a predetermined number of pieces having different lengths as described above, and then applying the makeup to the surface of the leaf spring. Finish by spraying a black paint for. Since this black coating is for makeup, it can be omitted.

The leaf spring constructed as described above comprises a zinc-rich coating layer 1 having excellent rust prevention properties, and a rubber primer layer 2 and a rubber glue layer 3 which are resistant to rubbing loads to form a rust prevention coating layer.

Therefore, since the leaf spring member a is covered with the zinc film of the zinc rich coating layer 1 and both rubber layers 2 and 3, rust is effectively prevented from being generated, and at the same time, the leaf spring members a are not separated from each other. Even if a rubbing load is generated on the mating surfaces, both rubber layers 2 and 3 elastically deform following the rubbing load, so that the rubbing load is effectively relieved and the coating film peels off. Can be prevented.

Therefore, the problem that the coating film of the overlapping portion of the leaf spring member, which frequently causes a rubbing load, is peeled off and rust is generated from the portion unlike the conventional one is eliminated.

Further, since the rubber primer layer 2 and the rubber glue layer 3 are rich in the property that the solid content is evenly dispersed, even if the zinc-rich coating layer 1 of the first layer is applied by rough dipping, It is possible to form a uniform rubber coating film on the surface to form a rust-preventing coating film with good rust-preventing properties. Therefore, the process control for maintaining an effective rust preventive coating film becomes easy, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a leaf spring embodying the present invention.

FIG. 2 is a partially cutaway perspective view showing a leaf spring member that constitutes the leaf spring.

FIG. 3 is an enlarged cross-sectional view of a leaf spring.

[Explanation of symbols]

 a ... leaf spring member 1 ... zinc rich coating layer 2 ... rubber primer layer 3 ... rubber glue layer

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B60G 11/02 9143-3D

Claims (1)

[Scope of utility model registration request] 1. A zinc rich coating layer applied to the surface of a leaf spring member, and a rubber primer layer applied thereon.
A rust-preventive coating film for automobile leaf springs, which consists of a rubber glue layer that is applied in layers.