Electrostatic coating method and electrostatic coating apparatus

A technology of electrostatic coating and coating equipment, which is applied in the direction of liquid spraying equipment, electrostatic spraying devices, coatings, etc., can solve the problems of difficult adaptation, unevenness, and achieve the effect of smoothness improvement and high smoothness

Inactive Publication Date: 2010-10-20
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of the side of a vehicle body such as a fender or a door panel, gravity acts along the surface to be coated when particles of the coating material are deposited on the surface to be coated, causing unevenness.
Therefore, due to gravity, the particles of the coating material are difficult to adapt to the shape of the surface to be coated

Method used

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  • Electrostatic coating method and electrostatic coating apparatus
  • Electrostatic coating method and electrostatic coating apparatus
  • Electrostatic coating method and electrostatic coating apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and comparative example 1

[0062] A coating material and a solvent were supplied to the varnish coating equipment as described above, and the relationship among the ratio of the solvent to the coating material, the NV value, and the LW value was investigated.

[0063] Figure 10 is a view showing the relationship between the number of revolutions of the rotary spray head and the NV value in the first embodiment. Figure 11 is a view showing the relationship between the number of revolutions of the rotary spray head and the LW value in the first embodiment. exist Figure 11 In , LW (Long Wave) is an index indicating the smoothness of the coated film measured by a measuring instrument called Wavescan (manufactured by BYK Gardner GmbH). Specifically, the surface of the coated film was irradiated with a laser beam from Wavescan, the intensity of reflected light of the surface of the coated film was detected and the optical profile of the surface of the coated film was detected. This optical profile is th...

no. 1 approach

[0068] In addition, the present invention is not limited to the first embodiment, and changes, improvements, and the like within a scope capable of achieving the object of the present invention are included in the present invention. For example, in the first embodiment, an electrostatic coating method is applied to the varnish coating equipment 10 . However, the present invention is not limited thereto. That is to say, the present invention can be applied to intermediate coating equipment, and can be applied to equipment other than primer coating equipment in surface coating equipment, such as protective varnish coating equipment (advanced varnish coating performed on top of varnish coating) apply). Furthermore, the present invention can be applied to one of these equipments, and can be applied to multiple equipments.

[0069] In addition, in the first embodiment, in the varnish application equipment 10, internal mixing with a gun tip is employed. However, the present inven...

Embodiment 2 and comparative example 2

[0080] A coating material and a solvent were supplied to the varnish coating equipment of the second embodiment, and the relationship between the ratio of the solvent to the coating material and the NV value or LW value was investigated.

[0081] Figure 12 is a view showing the relationship between the discharge amount of the rotary spray head and the NV value when the number of revolutions of the rotary spray head is constant in the second embodiment. Figure 13 is a view showing the relationship between the discharge amount of the rotary spray head and the LW value when the number of revolutions of the rotary spray head is constant in the second embodiment.

[0082] In the case of normal coating (standard condition) in which the supply amount of the coating material supplied to the rotary spray head is not reduced, as the discharge amount changes from 1 4 reduce to l 1 , the NV value becomes higher. Here, when the emission is l 3 When , the NV value falls within the pre...

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Abstract

The invention relates to an electrostatic coating method and an electrostatic coating apparatus. The electrostatic coating method includes: providing a rotary atomization type coating apparatus; supplying a coating material to a rotary atomization head of the rotary atomization type coating apparatus; changing the number of rotations of the rotary atomization head to change a particle diameter of particles of the coating material; adding a solvent to the coating material so that a NV value of a coated film formed on a coated surface of a workpiece falls within a predetermined range; and electrostatically coating the coated surface with the coating material and solvent.

Description

[0001] This application claims Japanese Patent Application No.2009-033086 filed on February 16, 2009, Japanese Patent Application No.2009-033121 filed on February 16, 2009, Japanese Patent Application No. 2009-033130 and priority of Japanese Patent Application No. 2009-033138 filed on February 16, 2009, the entire contents of which are incorporated herein by reference. technical field [0002] The present invention relates to an electrostatic coating method and an electrostatic coating device. More particularly, the present invention relates to an electrostatic coating method for electrostatically coating a coated surface of a vehicle and an electrostatic coating apparatus thereof. Background technique [0003] The relevant prior art discloses a method of three-coating and three-baking as a vehicle body coating technology. The three-coating and three-baking method is a treatment method including plating coating, drying, intermediate coating, drying, primer coating, varnish ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B5/04B05B12/00B05D7/14
CPCB05B5/0403B05D1/04B05B3/10B05B3/1064B05B5/08B05D7/574B05B12/084B05B12/08
Inventor 村田光弥岸本直辉户田健太
Owner HONDA MOTOR CO LTD
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