JP3671993B2 - External electrostatic coating method for construction - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for electrostatic coating of an outer surface of a structure such as a building or a bridge.
[0002]
[Prior art]
Conventionally, the outer surface of the structure is sprayed non-electrostatically, and a shielding net made of resin fibers is stretched outside the operator so that paint particles that have floated due to splashing from the painted surface or the influence of wind are not scattered. It was like that.
[0003]
[Problems to be solved by the invention]
Such a method has a problem that the coating rate of the paint is low, the working environment is poor due to the floating paint particles, and there are not a few paint particles that leak from the shielding net and scatter.
[0004]
For this reason, the application of electrostatic coating was considered, but the outer wall of the building is mostly concrete or wood and has low conductivity, and it is difficult to form a strong electrostatic field, and the coating rate of the paint particles is sufficient. Although it cannot be increased, the floating paint particles are reduced, but there is a problem that the work environment must be further improved and the paint particles leaking from the shielding net must be further reduced. Therefore, there was a problem that the coating rate was low.
[0005]
[Means, actions and effects for solving the problems]
As a means for solving the above-mentioned problems, the present invention has a configuration in which a shielding net made of a conductive material grounded is stretched outside the electrostatic field formed between the electrostatic coating spray gun and the structure. An electrostatic field is formed between the net and the spray gun, and the floating paint particles are attracted and adhered to the shielding net. This improves the working environment and significantly reduces the paint particles scattered outside. is there.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
[0007]
In FIG. 1, a is an outer wall of a building built on the ground b, and the paint is sprayed by a spray gun 1 possessed by an operator c.
[0008]
The spray gun 1 is an air electrostatic spray gun, in which the paint pumped from the paint tank 2 is atomized by the air pumped from the compressor 3 and ejected, and the positive electrode of the high voltage generator 4 is The ground b is grounded, the negative electrode is connected to the spray gun 1 via a high voltage cable, and the paint particles are attracted to the outer wall a by the action of the electrostatic field formed between the spray gun 1 and the outer wall a. It comes to be painted.
[0009]
However, since the outer wall a is made of concrete or wood and has low conductivity, the coating rate is not high compared to electrostatic coating of metal parts at a booth in a factory.
[0010]
For this reason, although less compared with non-electrostatic coating, the paint particles float due to splashing from the outer wall a or the influence of wind.
[0011]
Therefore, in the present embodiment, a frame is formed by a metal pole (not shown) on the outside of the worker c, and a mesh made of a metal mesh or a fiber in which carbon is mixed into a synthetic resin or a mesh coated with a conductive paint is applied to the frame. A highly conductive shielding net 5 such as is stretched and grounded.
[0012]
Then, since the floating coating particles are attracted by the shielding net 5 as a positive electrode, the workplace environment is improved and the coating particles are prevented from scattering to the outside.
[0013]
The present invention is also effective for exterior coating of structures such as bridges where paint is easily scattered by wind.
[0014]
An automatic gun may be used as the spray gun.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an embodiment of the present invention.
[Explanation of symbols]
1: Spray gun 2: Paint tank 3: Compressor 4: High voltage generator 5: Shield net

Claims (1)

Grounded one pole of the high voltage generator, and the other pole connected to the spray gun, the discharge from the spray gun by the action of the electrostatic field which is formed a high potential between the construct and the spray gun which is grounded the outer surface electrostatic coating method of the constructs as paint particles are coated on the outer surface of the construct, a conductive material which is grounded to the outside of the electrostatic field formed between the construct and the spray gun A method for electrostatically painting an outer surface of a structure, characterized in that a shielding net comprising:

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