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Method for coating spring member

A technology of spring components and coating methods, which is applied to the device for coating liquid on the surface, coating, pretreatment surface, etc., which can solve the problem of reduced adhesion of the coating film, residual unevenness on the surface of the coating film, difficulty in obtaining adhesion and Problems such as surface performance and coating film, to achieve the effect of easy heating

Inactive Publication Date: 2014-07-30
CHUO SPRING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the adhesion of the coating film decreases
In addition, since the surface side of the paint has started to harden during the heating process, the leveling (smoothing) of the coating film is not sufficiently carried out, and unevenness is easily left on the surface of the coating film.
Therefore, it is difficult to obtain a coating film with good adhesion and surface properties in a short time by using the heating method of the prior art.

Method used

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  • Method for coating spring member
  • Method for coating spring member
  • Method for coating spring member

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0043] [Structure of the balance bar]

[0044] First, the structure of the stabilizer bar painted using the painting method of this embodiment is demonstrated. figure 1 It is a perspective view showing the balance bar of this embodiment. figure 1 In , the left and right directions are defined based on the state in which the front is viewed from the rear. in addition, figure 1 Represented as a perspective gimbal body.

[0045] Such as figure 1 As shown, the stabilizer bar 1 includes a stabilizer bar body 10 and a coating film 11 . The stabilizer main body 10 is made of a carbon steel pipe (STKM13A, outer diameter φ23mm, wall thickness 6mm), and is in the shape of a tube that bulges forward in a C-shape. The stabilizer main body 10 is included in the spring member of the present invention. The coating film 11 covers the surface of the stabilizer main body 10 . The coating film 11 can be epoxy resin / polyester resin powder coating. Epoxy resin / polyester resin powder coatin...

no. 2 approach

[0061] The difference between the coating method of the spring member of the present embodiment and the method of coating the spring member of the first embodiment is that, in the coating process, an epoxy resin-based powder coating is used; and a cover member is used to form a non-coating portion ; and no partial painting process. Therefore, only the points of difference are described here.

[0062] The coating method of the stabilizer main body 10 of this embodiment includes a coating process, an electrode connection process, and a baking process. Image 6 It is a front view showing the main body of the stabilizer before painting in which the cover member is arranged in the painting process. Figure 7 It shows the front view of the main body of the stabilizer with cover parts arranged and painted in the same process. Figure 8 It shows the front view of the stabilizer main body where the non-painted part is formed in the same process. Figure 9 It shows the front view of ...

no. 3 approach

[0067] The difference between the method of coating a spring member of this embodiment and the method of coating a spring member of the second embodiment is that a part of the coating process is performed after the baking process. Therefore, only the points of difference are described here.

[0068] The coating method of the stabilizer main body 10 of this embodiment includes a coating process, an electrode connection process, a baking process, and a partial coating process. From the coating process to the baking process, it is the same as that of the second embodiment. Therefore, description is omitted here. Figure 10 Represented as a front view of the main body of the stabilizer bar in a partial painting process. For illustrative purposes, Figure 10 Represented as a perspective gimbal body. In addition, the hardened coating film is shown by hatching right down.

[0069] Such as Figure 10 As shown, on the surface of the stabilizer bar 10, the uncured coating film 202...

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Abstract

The invention provides a method for coating a spring member. The method comprises: a coating step, wherein a thermosetting coating material is applied to the surface of a spring member (10), thereby forming, in the spring member (10), a coated portion (20) that has an uncured coating film (200) and two uncoated portions (21a, 21b) that are arranged so as to sandwich the coated portion (20) and do not have the uncured coating film (200); an electrode connection step wherein first electrodes (41a, 42a) and second electrodes (41b, 42b) are electrically connected to the two uncoated portions (21a, 21b), respectively; and a baking step wherein the coating film (200) on the coated portion (20) that is arranged between the two uncoated portions (21a, 21b) is baked by applying a voltage between the first electrodes (41a, 42a) and the second electrodes (41b, 42b), thereby heating the spring member (10) by means of electrical conduction.

Description

technical field [0001] The invention relates to a coating method, by which a coating film with good adhesion and surface properties can be formed on a spring component. Background technique [0002] Various suspension springs are used in automobiles and rail vehicles. The surface of the suspension spring is usually coated to provide corrosion resistance. Coating methods include: liquid coating using liquid coatings and powder coating using powder coatings. In either method, when a thermosetting resin is used as the paint, the paint is hardened by heating after painting (baking coating). [0003] The baking of paint is usually carried out using a hot air furnace or a far-infrared furnace. In the case of heating in a furnace, heating is started from the surface side of the paint. However, since the heat needs to move to the object to be coated (spring member), it takes time to heat the inside of the paint, that is, to heat the paint on the object to be coated side. Theref...

Claims

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Application Information

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IPC IPC(8): B05D7/00B05D3/02B05D3/12
CPCB05D3/0254B05D3/0281B05D3/14
Inventor 冈本贵幸国田靖彦
Owner CHUO SPRING
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