JP3957453B2 - Spray painting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spray coating apparatus.
[0002]
[Prior art]
A coating method using a spray gun is widely known as a coating device for fiber reinforced cement outer wall materials.
[0003]
By the way, in this coating method using a spray gun, a large number of spray guns are arranged in a direction orthogonal to the transfer direction of the outer wall material, and the paint is intermittently or continuously applied based on a control signal from the spray as appropriate along with the transfer of the plate material. In some cases, the surface of the outer wall material is sprayed and colored.
[0004]
The above spray coating apparatus needs to supply compressed air for spraying paint to many spray guns.
As a means for supplying this compressed air, conventionally, as shown in FIG. 4, there are cases where a large number of spray guns 1... 1 are connected to the manifold 2 and compressed air is supplied by supplying high-pressure air through the air supply pipe 3. It was.
[0005]
However, when compressed air is supplied through a single supply pipe 3 in this way, the spray pressure of the spray gun 1 located at the back of the manifold 2 is higher as indicated by the arrow, and lower as it approaches the supply pipe 3. There was a tendency, and there was a drawback that it was difficult to achieve uniform ejection pressure.
[0006]
On the other hand, as a joining method for eliminating such drawbacks, as shown in FIG. 5, the supply pipe 3 is branched into a Y shape one after another, and the ends 3c... Bonding and making the pressure on spray guns 1.
[0007]
In this case, since the ends 3c of the supply pipes are opened to the manifold in a uniformly dispersed manner, a uniform pressure is applied to the spray gun, which is convenient in this respect, but the axis 3d of the branched pipe 3a. However, as shown in FIG. 6, if there is a case where it is aligned with the axis 5 a of the air intake 5 of the spray gun 1. In some cases, the blowout pressure of other spray guns decreases, making it difficult to achieve a uniform blowout pressure.
[0008]
[Problems to be solved by the invention]
An object of the present invention is to solve the above problems and to apply a uniform air pressure to each spray gun when a large number of spray guns are connected in parallel to one manifold.
[0009]
[Means for Solving the Problems]
That is, the spray coating apparatus according to claim 1 is a spray coating apparatus having a plurality of spray guns, wherein compressed air supplied to the spray gun is supplied from a manifold arranged along the spray gun, An air supply pipe for supplying compressed air to the manifold is equally divided into a plurality of branch pipes whose ends are branched in a Y shape, and the branched ends are connected to equal positions in the length direction of the manifold. In addition, the axis of the communication opening of each of the branch pipes with respect to the manifold is opened with a rotational deviation angle about the axis of the manifold so as not to communicate with the communication opening to the spray gun in a straight line. It is what.
[0010]
Here, the rotation declination is an angle at which the axis of the communication gun opening and the axis of the branch pipe are stretched in a plane perpendicular to the axis of the manifold.
According to the configuration of the present invention, since the air supply pipe branches in a Y shape, the air pressure is evenly distributed, so that the air supply pressure from the branch pipe to the manifold is not biased. In addition, since the direction of the opening axis of the branch pipe with respect to the manifold has a rotational deflection angle with the communicating opening of the spray gun, both axes happen to be in the same plane with respect to the plane perpendicular to the axis of the manifold. Even if it becomes, only the spray gun does not circulate compressed air.
[0011]
Therefore, according to the spray coating apparatus of the present invention, uniform coating is possible.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
FIG. 1 is a front view of a spray coating apparatus according to an embodiment, and FIG. 2 is a side view of FIG.
[0013]
1 and 2, reference numerals 1... 1 denote spray guns arranged in a large number. For example, on the conveyor 11 to which the outer wall material 10 is transferred, it is supported in a row by a base frame 12 in a direction orthogonal to the transfer direction. Has been.
[0014]
The painting is performed by continuous or intermittent spraying of the spray guns 1.
The compressed air is supplied to each of the spray guns 1... 1 through a single manifold 2 in which a large number of spray guns 1.
[0015]
The air supply pipe 3 for supplying air to the manifold 2 is branched in a Y shape from the main pipe 3a as clearly shown in FIG. 1, and the tip of the branch pipe 3b is further branched in a Y shape. The tip of each branch pipe 3c is connected to the manifold 2 so as to be in the same position in the axial direction.
[0016]
Further, as shown in FIG. 3, the connection direction of the air supply pipes 3c to the manifold 2 is rotated around the axis 2a of the manifold so as not to communicate with the communication axis 1a to each spray gun 1. Therefore, as shown in FIG. 3, the communication axis 1a to the spray gun 1 ... 1 and the axis 3d of the air supply pipe 3c are perpendicular to the manifold axis 2a as shown in FIG. Even if it is on the same plane as the paper surface in the figure, air does not flow directly, and the pressure of only a specific spray gun does not increase.
[0017]
Therefore, the air pressure from the manifold 2 applied to the entire spray is made uniform, and uniform coating is possible.
[0018]
【The invention's effect】
Since the present invention is configured as described above, when the outer wall material is painted with a spray gun, the spray pressure from each spray gun is made uniform, so that painting can be performed under uniform conditions, and a beautiful painted surface. Is obtained.
[Brief description of the drawings]
FIG. 1 is a front view of a spray coating apparatus.
FIG. 2 is a side view of the apparatus of FIG.
FIG. 3 is an enlarged cross-sectional view of a main part of a manifold part.
FIG. 4 is a plan view of a manifold portion of a conventional spray coating apparatus.
FIG. 5 is a plan view of a manifold portion of another conventional example.
6 is a side view of FIG. 5. FIG.
[Explanation of symbols]
1 Spray Gun 1a Spray Gun Communication Axis 2 Manifold 2a Manifold Axis 3 Air Supply Pipe 3b, 3c Branch Pipe 3d Air Supply Pipe Axis 10 Outer Wall Material 11 Conveyor θ Rotational Deflection

Claims (1)

In a spray coating apparatus having a large number of spray guns, compressed air supplied to the spray gun is supplied from a manifold disposed along the spray gun, and an air supply pipe for supplying the manifold with compressed air Is branched equally into a plurality of branch pipes whose ends are branched in a Y-shape, and the branched ends are connected to equal positions in the length direction of the manifold. A spray coating apparatus in which an axis of a communication opening with respect to a manifold is opened with a rotational deviation angle about the axis of the manifold so as not to communicate with a straight line with respect to a communication opening with respect to each spray gun.

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