JP3324958B2 - painting booth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating booth for coating a vehicle body such as an automobile.

[0002]

2. Description of the Related Art In the process of coating a body of an automobile or the like, when a water-based paint (aqueous solution-based paint) is used as a base and a solvent-based clear paint is applied thereon, the work is performed after the completion of the water-based paint and before the clear paint. Requires a drying step in which the water is heated by a heat source to evaporate water in the water-based paint. This drying step is also indispensable for improving the finish of the interface between the base layer and the clear layer.

Conventionally, as shown in FIG. These are linearly arranged with the base layer coating device (12) at the front stage and the clear layer coating device (13) at the rear stage, and work is transferred from the former coating device (12) to the latter coating device (13). A structure in which a drying device (17: flash zone) is provided on the transport path (14) for transport is generally used (JP-A-3-38275, etc.).

[0004]

The paint used in the base layer coating device (12) is not limited to the water-based paint.
For example, a solvent type paint such as a metallic paint may be used. It is desirable that such two types of coating can be performed on the same coating line in consideration of the installation space of the apparatus and the like.
In 2), it can be realized by appropriately switching and supplying the paint to be used between the aqueous type and the solvent type in accordance with the type of the work carried in.

[0005] However, in this state, the work coated with the solvent-type paint is also conveyed to the flash zone (17) and dried by heating, which causes a problem in coating film quality (the solvent-type paint is preferably dried at room temperature. ). Therefore, for the work to which the solvent type paint is applied, some countermeasures are required so that the heating and drying can be avoided. As a countermeasure, for example, it is conceivable to turn on / off the heat source in the flash zone in accordance with the type of coating material to be applied. However, this makes it difficult to quickly follow the furnace temperature, resulting in a reduction in the operation rate. In addition, as described in JP-A-3-38275, the front surface of the heat source may be opened and shielded by sliding a shielding plate according to the type of work, but this method may be used to cover the vehicle body. It is necessary to frequently move a large shielding plate, and it is inevitable that the mechanism becomes large and complicated.

[0006] On the other hand, even when a coating booth is planned to be newly set up for base coating with a solvent-based coating, a drying apparatus (1) for the water-based coating is required in consideration of the possibility of coating with a water-based coating in the future.
7) needs to be installed between the applicator (12) and (13).
However, since the drying device is very large, the initial space is remarkably increased.

Accordingly, the present invention provides a coating that can apply a water-based paint and a solvent-based paint on the same line without reducing the operation rate, with a simple structure, and that can reduce the initial space. The purpose is to provide a device.

[0008]

In order to achieve the above object,
In the present invention, a coating device in the former stage for selecting one of a water-based paint and a solvent-type paint and applying it to a work, and a coating device in a later stage for further applying a paint on the coating film applied by the coating device. , A transport path for transferring the work from the preceding coating apparatus to the subsequent coating apparatus,
Lateral application devices are arranged side by side so that the transport directions are opposite to each other, and the transport routes are arranged so as to have parallel portions, and the inside is a transport route for solvent-based paint, The outside is used as a transport path for water-based paint, and the work carried out from the coating device at the preceding stage can be selectively supplied to a transport path corresponding to the type of paint applied by the device. A drying device for evaporating the water in the water-based paint was provided, and a setting zone for evaporating the solvent in the solvent-based paint was provided in the transport path for the solvent-based paint.

[0009]

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a coating booth (1) according to the present invention is formed by a coating device (2) at a former stage for forming a base layer on a work (not shown) and a coating device (2). And a transport path (4) for transferring a workpiece from the former coating device (2) to the latter coating device (3). Have. The former-stage coating apparatus (2) applies one of a water-based paint and a solvent-based paint to the work according to the type of the work carried in. The coating method is not particularly limited, and various coating methods such as spraying, dipping, electrostatic coating, and electrophoresis can be applied.

On the side of the coating device (2) of the former stage, the coating device (3) of the latter stage is juxtaposed so that the transport direction is reversed. Although the drawing shows a case where both coating apparatuses (2) and (3) are arranged in parallel, they need not always be strictly parallel. A transport path (4) is provided between the outlet (2a) of the former coating device (2) and the inlet (3a) of the latter coating device (3). A U-shaped or U-shaped coating line is formed in plan view.

The transport path (4) branches on the way to have a parallel part and joins. Of the parallel parts, the inside,
That is, the sides of the coating devices (2) and (3) are used as a transport path (5) for the solvent-based paint, and the outside thereof is used as a transport path (6) for the aqueous paint. The work carried out from the coating device (2) in the preceding stage is transferred to one of the transport paths (5) corresponding to the type of the coating material (water-based coating material or solvent-based coating material) applied by the coating device (2) at the branch point. ) And (6) are selectively supplied, then merged and carried into the subsequent coating device (3).

A transport zone (5) for the solvent type paint has a setting zone (5) for evaporating the solvent in the paint at room temperature.
a) is provided. On the other hand, a drying device (7: flash zone) for heating and drying the work with an appropriate heat source, for example, an infrared lamp or the like, for evaporating water in the paint is provided in the transport path for the aqueous paint. .

As a conveyor for the two transfer paths (5) and (6), a conveyor which gives a small shock to the work at the branching and merging points is selected and used.

According to the coating booth (1), the work carried out from the coating device (2) at the preceding stage is distributed to dedicated transport paths (5) and (6) according to the type of the applied coating material.
Set the workpiece coated with solvent-based paint in the setting zone (5
In (a), the work to which the water-based paint is applied is transported to the drying device (7) and dried, so that a dry form suitable for the properties of the paint can be secured. Therefore, it is possible to prevent a decrease in the quality of the coating film. Also, since the drying device (7) for the water-based paint can be kept ON, it is turned ON-O.
As in the case of FF, there is no need to carry in the work after waiting for the temperature of the furnace temperature to drop, and the operation rate is improved. The temperature in the furnace of the drying device (7) does not necessarily need to be kept constant. To reduce the operating cost, the temperature is slightly lowered after the drying is completed, and the temperature is reduced to a predetermined drying temperature by the time the next work is carried in. It is desirable to control the temperature to rise.

Further, since a large-sized movable part such as a shielding plate is not required, the size and simplification of the mechanism can be achieved.

Further, as described above, the subsequent coating device (3) is juxtaposed beside the former coating device (2), and the transport route (6) for the water-based paint is changed to the transport route for the solvent type paint. Since it is disposed outside (5), the transport path (6) for the water-based paint can be easily removed and added. That is, when removing / adding, the transport path (6) does not interfere with the coating apparatuses (2) and (3), so that the transport path (6) can be smoothly moved. Therefore, when a welding booth is newly established on the premise of base coating with a solvent-type paint, as shown in FIG. 2, a line is formed in a form in which the transport path (6) for water-based paint is omitted.
Then, at the stage of starting the base coating with the water-based paint, the transport path (6) for the water-based paint is added to the side of the transport path (5) for the solvent-based paint, and the structure shown in FIG.
Usually, the required space of the setting zone (5a) is considerably smaller than that of the flash zone (7), so that the initial space can be reduced as a result. In addition, the conventional painting booth (1) is linear and very long, so there are many restrictions on installation space, whereas the painting booth (1) of the present invention is entirely U-shaped (or U-shaped) and compact. Therefore, there is an advantage that the degree of freedom of the installation space is increased.

In the above description, the case where the clear layer is formed by the subsequent coating device (3) has been exemplified. However, the function of the coating device (3) is that the coating layer applied by the preceding coating device (2) is used. What is necessary is just to apply a paint on top of the paint, and the kind of the paint to be applied is not particularly limited. Therefore, a solvent type paint other than clear may be applied, or an aqueous paint may be applied.

[0020]

According to the present invention, it is possible to secure a dry form suitable for the properties of the coating material, thereby preventing the deterioration of the coating film quality due to poor drying. In addition, since it is not necessary to carry in the work after waiting for the temperature inside the furnace of the drying device to rise, the operation rate is improved. Furthermore, miniaturization and compactness can be achieved.

A second-stage coating device is arranged beside the first-stage coating device so that the transport direction is opposite to the first-stage coating device. If the transport path is disposed inside the transport path, the transport path for the water-based paint can be easily removed and added. Therefore, even when a welding booth is newly established on the premise of coating with a solvent-type paint, a line can be formed without the transport route for the water-based paint, and the initial space can be reduced. In addition, compared to a conventional linear painting booth, the degree of freedom in installation space can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a coating booth according to the present invention.

FIG. 2 is a schematic plan view of a painting booth according to the present invention.

FIG. 3 is a schematic plan view of a conventional painting booth.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Painting booth 2 Pre-coating device 3 Post-coating device 4 Transport route 5 Transport route for solvent-based paint 6 Transport route for water-based paint 7 Drying device (flash zone)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-250957 (JP, A) JP-A-3-38275 (JP, A) JP-A-4-106669 (JP, U) (58) Survey Field (Int. Cl. ⁷ , DB name) B05B 15/12 B05C 15/00

Claims (1)

(57) [Claims] 1. A coating device in a preceding stage for selecting one of a water-based paint and a solvent-type coating material and applying it to a work, and a coating device in a latter stage for further applying a paint on a coating film applied by the coating device. And a transport path for transferring the work from the former coating apparatus to the latter coating apparatus , wherein the transport directions are opposite to each other to the side of the former coating apparatus.
So that the subsequent coating devices are arranged side by side
It is arranged so that it has a part, the inside is a transport path for solvent-based paint, and the outside is a transport path for water-based paint, and the work carried out from the preceding coating device is changed to the type of paint applied by the device. It can be selectively supplied to the corresponding transport path,
Soluble Rutotomoni, the transport path of the solvent type coating composition provided a drying apparatus for evaporating the moisture in the water-based paint in the conveying path for the water-based paint
Set up a setting zone to evaporate the solvent in the formulation paint.
Paint booth, wherein the digit.