JPH0338275A - Painting apparatus - Google Patents

Abstract

PURPOSE:To enhance productivity by constituting a heat source of a far infrared lamp and providing a shield plate to a flash-off chamber. CONSTITUTION:When aqueous paint is applied in a painting booth 1, a shield plate 6 is changed over to a state opening the front surface of a far infrared lamp 3 and far infrared heating is performed in a flash-off chamber 4 to evaporate the moisture of a film. Subsequently, aqueous or oily paint is subjected to lap-painting in the painting booth 2 of a post-stage and, when oily paint is applied in the painting booth 1 of a front stage by a coating apparatus 12, the shield plate 6 is changed over to a state covering the front surface of the far infrared lamp 3 and a setting process allowing a film to stand at room temp. in the flash-off chamber 4 is performed to evaporate the solvent of the film and, subsequently, aqueous or oily paint is subjected to lap-painting in the painting booth 2 of the post-stage. By this method, the time of each process can be shortened and productivity can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to a coating device for applying paint over and over an automobile body.

(Prior art) Conventionally, this type of equipment has been disclosed in Japanese Patent Publication No. 52-30170, with a former painting booth for applying water-based paint, and a latter-stage painting booth for applying water-based paint on top of the coating film applied in the painting booth. It is known that a flash-off chamber provided with a heat source for radiant heating is provided between the booth and the flash-off chamber.

On the other hand, when applying oil-based paint over a film of oil-based paint, a setting zone is placed between the first and second painting booths, and the solvent for the oil-based paint applied in the first painting booth is removed. The oil-based paint is evaporated in the setting zone, and then oil-based paint is applied over and over again in the subsequent painting booth.

(Problem to be Solved by the Invention) By the way, installing a painting line for applying water-based paint and a painting line for applying oil-based paint separately requires a large installation space. It is desired to be able to apply oil-based paint.

Here, the heat source in the flash-off chamber is turned on when evaporating the water in the water-based paint applied in the preceding painting booth, and turned off when evaporating the solvent of the oil-based paint applied in the preceding painting booth. As a solution, it is conceivable to use the flash-off chamber also as a setting zone so that water-based paint and oil-based paint can be applied on the same painting line.

However, when the heat source is composed of a far-infrared lamp, the lamp has a structure that heats ceramics etc. on the outer periphery and emits far-infrared rays, so if it is turned on and off as described above,
A waiting time is required until far-infrared radiation starts or stops, and the flash-off process and setting process take a long time, reducing productivity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a coating apparatus that satisfies the above-mentioned needs and can improve productivity.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a "interval" between a former painting booth and a latter painting booth, in which paint is repeatedly applied on the coating film applied in the painting booth. , a coating apparatus comprising a flash-off chamber equipped with a heat source for radiant heating, in which the heat source is a far-infrared lamp, a shielding plate is provided in the flash-off chamber to cover the front surface of the heat source, and the heat source is The front side can be freely switched between open and open.

(Function) When water-based paint is applied in the previous painting booth, the shield plate is switched to open the front of the heat source to evaporate the moisture in the water-based paint, and when oil-based paint is applied, the shield plate is switched to the state where the front side of the heat source is opened. evaporate the oil-based paint solvent.

Therefore, with the heat source turned on, the shielding plate is switched between covering the front side of the heat source and leaving the front side open.
Since it uses a flash-off process to evaporate water and a setting process to evaporate the solvent, there is no need to wait for far-infrared radiation to start or stop, making the flash-off process and setting process much easier. The time required can be shortened.

In addition, by configuring the heat source as a far-infrared lamp, the far-infrared rays enter the inside of the coating film, so the coating film can be heated efficiently and the time required for the flash-off process can be shortened.

Furthermore, by making the reflector of the heat source reversible between a shielding state located in front of the heat source and an irradiation state located behind the heat source, the reflector can also be used as a shielding plate, so the number of parts can be reduced.

Furthermore, the painting booth may be provided with a coating device for water-based paint and a coating device for oil-based paint, respectively, and these coating devices may be used to apply water-based paint and oil-based paint to the car body. Providing two coating devices, one for paint and one for oil-based paint, will make the interior of the coating booth complicated and will increase equipment costs.

However, by configuring as in the third aspect of the invention, this problem can be solved.

(Example) Referring to Figures 1 to 3, (1) is the first-stage painting booth, and (2) is the second-stage painting where the paint is applied over the coating film applied in the painting booth (1). It shows a flash-off room (4) equipped with a far-infrared lamp (3) as a heat source for radiant heating between the two painting booths (1) and (2), and the preceding painting booth (1) and the flash An air curtain zone (5) (5) is provided between the flash-off room (4) and the flash-off room (4) and the subsequent painting booth (2), respectively.
), and a shielding plate (6) was also provided in the flash-off chamber (4).

A large number of far-infrared lamps (3) are installed on both sides and the top of the support frame (n) provided in the flash-off chamber (4), and these lamps (3) emit far-infrared rays to the automobile body from above and from the sides. Made it possible to irradiate.

The shielding plate (6) is made of a stainless steel plate with a mirror finish, and is movable along a rail (8) laid in the flash-off chamber (4).
An endless chain (IO) driven by a motor (9) is provided at the bottom of the shield plate <6>, and an arm piece (11) fixed to the shield plate <6> is connected to the endless chain (IG), thus (6) is connected to the shielding plate by the motor (9).
6> moves to the inside of the support frame <n to cover the front surface of the far-infrared lamp (3>), and the shielding plate (6> moves to the outside of the support frame (7) to cover the lamp). (3) The front side can be switched to an open state.

In the drawing, (6a) shows a hole formed in the shielding plate (6) for weight reduction.

Further, each of the painting booths (1) and (2) may be provided with a coating device for water-based paint and a coating device for oil-based paint, so that water-based paint and oil-based paint can be applied by these coating devices. If a coating device for water-based paints and a coating device for oil-based materials are installed in each of the painting booths (1) and (2), the interior of the painting booths (1) and (2) will become complicated and the equipment cost will increase. .

Therefore, in this embodiment, each of the painting booths (1) and (2) is provided with a common coating device ('lz) for water-based paints and oil-based paints, thereby reducing equipment costs.

As shown in FIG. 4, the coating device a is connected to a first coating head a3 attached to a coating robot via a communication path 04).
A manifold (+51) is connected to the first manifold (+51) via a supply pipe ('IO) to the second manifold (+51).
+7), and selectively introduce water-based paint and oil-based paint from the plurality of water-based paint introduction pipes 0 seconds and oil-based paint introduction pipes CI of the second manifold (17), and connect the common application head a3. This made it possible to perform color change painting using water-based paints and oil-based paints.

More specifically, the first manifold a9 includes a manifold (+5
A switching valve 0 is installed to switchably connect the passage (15a) inside the passageway (15a) and the drain passageway (■) connected to the outside.
A cleaning pipe consisting of a water pipe I2@, a hydrophilic solvent pipe (■), and a solvent pipe (■) was connected.

The first cleaning valve (2) includes an air valve (22a) attached to the first manifold Cl5l, a solvent valve (122b), and an on-off valve G!
2c), and the on-off valve C via the cleaning pipe <22d)
Water valve C22r) and hydrophilic solvent valve c! attached to wash valve manifold 22e) connected to '2c)! During painting work, the first cleaning valve is closed, the switching valve is switched to the passage (15a) side, and the paint is transferred to the passage (15a).
5a) to the communication passage (l@), and during cleaning work, the switching valve is switched to the drain passage ■ side and the supply pipe (
The cleaning liquid to be introduced into the IO as described later is guided to the drain passage (1), and the air valve 122a) is opened to drain the cleaning liquid to the passage (15).
a) and the paint in the communication path aa to the coating head a3 side, and further each valve 122b) 122f) of the first cleaning valve (1).
122g) are sequentially opened, and the cleaning liquid is connected through the passage (15a) to the solvent, hydrophilic solvent, and water in the order of oil-based paint, and water, hydrophilic solvent, and solvent in the order of water-based paint. It was designed to be guided to the passage aO for cleaning.

The second manifold (171) includes each paint introduction pipe (IO
The second manifold (1) connected to the supply passage ae, respectively (
17) and the return pipe (18a) (1
A selection valve switchably connected to the passageway (17a) was attached to the passage (17a), and a cleaning pipe similar to that described above was connected to the passageway (17a) via a second cleaning valve (2).

The second cleaning valve (2) is connected to the on-off valve (28c) via the second manifold (air valve (a) attached to +71, solvent valve (b) and on-off valve (C)), and the cleaning liquid pipe (28d). Water valve attached to the connected cleaning valve manifold (28e) @r
) and a hydrophilic solvent valve 0g), and when painting, one selection valve corresponding to a predetermined color among water-based or oil-based paint is switched to the passage (17a) side, and the paint is passed through the passage (17a). During cleaning, the selection valves are switched to the return pipes (18a) and (19a) to return the paint to the supply source, and each valve (a) of the second cleaning valve (2)
f') (28g) of (28b) to the first manifold (
The +51 passage (15a) and the communication passage (14) were sequentially opened in the same order as cleaning, and air and cleaning liquid were supplied to the supply passage aO to clean it.

In this way, the coating device (I2) is installed in the former coating booth (1).
), when applying water-based paint, switch the shielding plate (6) to open the front of the far-infrared lamp (3),
The water in the paint film is evaporated by far-infrared heating in the flash-off chamber (4), and then water-based or oil-based paint is applied in the subsequent painting booth (2), and the water-based or oil-based paint is applied in the former painting booth (1). When applying oil-based paint using the applicator (121), use the shielding plate (6>) with a far-infrared lamp (
3), the front side of the painting booth (3) is covered, and a setting process is performed in which the front side of the painting booth (4) is left at room temperature to evaporate the solvent in the paint film.
In step 2), water-based or oil-based paint was applied over and over again.

In the above embodiment, there is a shielding plate (6) in the flash-off chamber <4>.
However, it is also possible to configure the reflector (3) of each far-infrared lamp (3) to also serve as a shielding plate.

That is, as clearly shown in FIGS. 5 to 7, each of the reflectors (2) is pivoted at its end to the outer periphery of a far-infrared lamp (3), and a support frame for mounting each of the far-infrared lamps (3). Attach the air cylinder ω to (7), engage the operating rod ■ with the elongated hole in the pin 0 protruding into each reflector ■, connect the rod ■ to the piston rod of the cylinder ω, and thus Each reflector ■ due to the operation of the cylinder ω
The shielded state (shown by the imaginary line in Figure 7) is located in front of the far-infrared lamp (3), and the irradiated state B (shown by the solid line in Figure 7) is located on the back side of the far-infrared lamp (3). (state shown) can be reversed.

In addition, in the event that the conveyor of the painting line breaks down and stops during painting work, the flash-off chamber ( 4) It is advantageous in that overheating of the automobile body can be prevented.

(Effects of the Invention) As described above, according to the invention of claim 1, the flash-off process for evaporating the water in the water-based paint film and the setting process for evaporating the solvent in the oil-based paint film are performed in the same painting line. In addition, the paint film can be efficiently heated to the inside, and there is no need to wait for far-infrared radiation to start or stop, reducing the time required for flash-off and setting processes. can improve productivity.

According to the invention of claim 2, in addition to having the same effect as described above, the reflector of the heat source can also be used as a shielding plate, reducing the number of parts, and according to the invention of claim 3, the equipment cost of the painting booth can be reduced. This has the effect of being able to reduce the amount of space required, and also being advantageous in terms of the space for installing the coating device.

[Brief explanation of drawings]

Fig. 1 is a side view showing one example of the coating device of the present invention, Fig. 2 is a perspective view of the main part, Fig. 3 is a cutaway front view of the main part,
Fig. 4 is an explanatory diagram of the coating device, Fig. 5 is a cutaway front view of main parts showing another embodiment, Fig. 6 is a cross-sectional view taken along the line Vl-VI in Fig. 5, and Fig. 7 is its operation. FIG. 3 is a front view of main parts showing the state. (1) (2)...Painting booth (3>...Far infrared lamp (heat source) (4>...Flash-off chamber (6)...Shielding plate aa...Coating device■... Reflector Permission Request Person: Honda Motor Co., Ltd. Kin Kitamura - (3 others)

Claims (1)

[Scope of Claims] 1. A flash-off room equipped with a heat source for radiant heating is arranged between the first-stage painting booth and the second-stage painting booth, in which paint is applied over the coating film applied in the previous painting booth. In the coating apparatus, the heat source is composed of a far-infrared lamp, and a shielding plate is provided in the flash-off chamber so as to be switchable between a state in which the front surface of the heat source is covered and a state in which the front surface of the heat source is open. A painting device characterized by: 2. In a coating equipment comprising a flash-off chamber equipped with a heat source for radiant heating between a first stage painting booth and a second stage painting booth where paint is applied over the coating film applied in the first stage painting booth. , the heat source is constituted by a far-infrared lamp, and the reflector of the heat source is reversible between a shielding state located on the front side of the heat source and an irradiation state located on the back side of the heat source. . 3. The coating apparatus according to claim 1, wherein at least the preceding coating booth of both coating booths is provided with a common coating device for coating water-based paint and oil-based paint.