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 carrie

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

Example

[0042]

[0043] [Structure of balance bar]

[0044] First, the structure of the balance bar painted by the coating 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-right direction is defined based on the state where the front side is seen from the back side. In addition, figure 1 Represented as the perspective balance bar main body.

[0045] Such as figure 1 As shown, the balance bar 1 includes a balance bar main body 10 and a coating film 11. The balance bar main body 10 is made of carbon steel pipe (STKM13A, outer diameter φ23mm, wall thickness 6mm), and has a tubular shape bulging forward in a C shape. The balance bar main body 10 is included in the spring member of the present invention. The coating film 11 covers the surface of the balance bar body 10. The coating film 11 may be an epoxy resin / polyester resin powder paint. Epoxy / polyester resin powder coatings are mainly composed ...

Example

[0060]

[0061] The difference between the coating method of the spring member of this embodiment and the method of coating the spring member of the first embodiment is that in the coating process, epoxy-based powder coating is used; the cover member is used to form the non-coated part ; And there is no partial coating process. Therefore, only the differences are explained here.

[0062] The coating method of the balance bar main body 10 of this embodiment includes a coating process, an electrode connection process, and a baking process. Image 6 This is a front view of the balance bar main body before painting where the cover member is arranged in the painting process. Figure 7 Shown is the front view of the stabilizer body with the cover member arranged and painted in the same process. Figure 8 Shown is the front view of the balance bar body forming the non-coating part in the same process. Picture 9 Shown as the front view of the balance bar body during the electrode connect...

Example

[0066]

[0067] The coating method of the spring member of this embodiment differs from the method of coating the spring member of the second embodiment in that there is a partial coating step after the baking step. Therefore, only the differences are explained here.

[0068] The coating method of the balance bar main body 10 of this embodiment includes a coating process, an electrode connection process, a baking process, and a partial coating process. The steps from the coating process to the baking process are the same as in the second embodiment. Therefore, the description is omitted here. Picture 10 Shown as a front view of the main body of the stabilizer during the partial painting process. For ease of illustration, Picture 10 Represented as the perspective balance bar main body. In addition, the cured coating film is shown with diagonal hatching on the lower right.

[0069] Such as Picture 10 As shown, on the surface of the balance bar 10, the left and right end portion...

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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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