JPS6158233B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coating treatment and an apparatus for coating and drying an automobile body.

[Conventional technology]

Conventionally, in a coating method in which objects to be coated, such as automobile bodies, are coated and dried continuously, a tunnel-shaped coating booth and drying oven are used.
A predetermined coating film is formed by continuously passing a trolley carrying the object to be painted.

However, in traditional paint booths,
Since multiple objects are being painted at the same time with different colored paints, paint mist from different colored paints scatters inside the painting booth and adheres to the surfaces of the objects being transported back and forth. This may cause paint defects such as fogging. Therefore, the amount of conditioned air supplied to the painting booth is increased to reduce the scattering range of the paint mist and prevent the paint mist from adhering to the objects to be painted that are being conveyed back and forth.

[Problem that the invention seeks to solve]

For this reason, there is a problem that not only the amount of air conditioned air to be supplied increases, but also a large amount of energy such as steam and electricity for air conditioning is consumed.

In addition, the drying oven has openings at both ends through which the object to be coated is carried in and out, and when the object to be coated is carried in and out, the hot air inside the drying oven flows out from the opening along the object to be coated. However, there is a problem that a large amount of heat loss occurs.

The present invention has been made to solve the above-mentioned problems, and its purpose is to shield at least the front of the cart on which the object to be painted is placed when painting and drying the object to be painted, such as an automobile body. Another object of the present invention is to provide a coating method and apparatus that can reduce the amount of air conditioned air supplied into the coating booth and prevent heat loss from the drying oven.

[Means for solving problems]

In the method for painting an automobile body or the like according to the present invention, the object to be painted, such as an automobile body, is coated and dried while a trolley carrying the object to be painted, such as an automobile body, is transported by a conveying device. The method is characterized in that the object to be painted, such as the automobile body, is transported while shielding at least the front side of the object during painting and drying. The processing equipment includes a painting booth for painting objects to be painted such as automobile bodies, a setting chamber for evaporating organic solvents from the paint film of the object to be painted, and a drying oven for drying and curing the paint film. , a trolley on which the object to be coated is placed and which can be moved sequentially through the painting booth, the setting room, and the drying oven by means of a conveyance device; and a means for shielding at least the front side of the trolley. and a shielding mechanism attached to the truck so as to be extendable and retractable in the front and rear directions of the truck.

The painting process in the present invention includes a painting process in which a paint is sprayed onto the surface of an object to be painted such as an automobile body to form a paint film, and a drying process in which the paint film formed on the surface of the object to be painted is baked and hardened. This includes:

[Effect]

According to the method and apparatus for painting an automobile body, etc., according to the present invention, at least the front side of the trolley on which the object to be painted is placed is shielded, so that when painting the object to be painted, there is no possibility of scattering in the painting room. Paint mist almost never flows sideways.

Further, according to the method and apparatus for painting an automobile body, etc. according to the present invention, at least the front side of the trolley on which the object to be painted is placed is shielded when drying the paint film formed on the object to be painted. Because there are
Since the loading/unloading ports opened at both ends of the drying oven are shielded, almost no high-temperature air flows out from the loading/unloading ports.

Further, according to the method and apparatus for painting an automobile body, etc. according to the present invention, at least the front side of the trolley on which the object to be painted is placed is shielded.
When drying the paint film formed on the object to be painted, a portion of the high-temperature air is engulfed, shortening the baking hardening time of the paint film.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a side sectional view for explaining the painting processing apparatus according to the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a side view during the painting processing according to the present invention. , FIG. 4 shows a side view during the drying process in the present invention. In Figures 1 to 4,
1 is a painting processing device; this painting processing device 1
consists of a painting booth 2, a setting chamber 3, and a drying oven 4, which are formed in a continuous manner, and a trolley 5 on which an automobile body W, which is an object to be painted, is placed, with its center section facing in the longitudinal direction. is starting to pass.

The space inside the painting booth 2 includes an air supply chamber 6,
Three chambers are formed in sequence: a painting chamber 7 and an exhaust chamber 8. The air supply chamber 6 and the painting chamber 7 are separated by a filter 9 that removes fine dust, and the painting chamber 7 and the exhaust chamber 8 are separated by a screen. It is divided with 10 as the boundary. An air supply duct 13 in which an air supply fan 11 and an air conditioner 12 are installed is connected to the air supply chamber 6, and an exhaust duct 15 in which an exhaust fan 14 is installed is connected to the exhaust chamber 8. They are installed consecutively.
Further, a wide filter 16 is disposed in the exhaust chamber 8, and the paint mist discharged from the painting chamber 7 is captured by the filter 16.

Further, a conveyor 17, which is a conveying device, is installed on the top surface of the screen 10 toward the center longitudinal direction of the painting room 7, and this conveyor 17 is used to place and convey an automobile body W, which is an object to be painted. trolley 5
A plurality of dogs 18 are provided to be hooked to. On both sides of this conveyor 17, rails 19,
19a has been laid, and this rail 19,19
A is designed to guide the cart 5. Also,
Automatic painting machines 20, 20a are arranged on the sides of both rails 19, 19a, and spray guns 21, 21a are installed in these automatic painting machines 20, 20a to spray paint toward the automobile body W. It is being

Further, the setting chamber 3 is formed continuously with the painting chamber 7 by a cover shell 22, and in the center thereof, a trolley 5 transported from the painting chamber 7 is transported to the drying oven 4 with a short interval. conveyor 17a
has been installed. The setting chamber 3 is designed to appropriately evaporate the organic solvent from the paint film formed on the surface of the automobile body W.

Further, the drying oven 4 is formed continuously with the setting chamber 3 by the oven shell 23, and in the center thereof there is a conveyor 17a continuing from the setting chamber 3.
has been installed. Furthermore, a heating device 24 is provided above the furnace shell 23 to maintain the inside of the drying furnace 4 at a predetermined temperature. This heating device 24 includes a combustion burner 26 and a circulation fan 27 provided in the middle of a circulation duct 25 whose both ends are open into the drying oven 4, and a damper provided in the upstream side of the circulation duct 25 and a damper provided in the middle. 28 and an exhaust duct 29 with 28. The air inside the drying oven 4 is introduced into the combustion burner 26 by the operation of the circulation fan 27, and the high-temperature air adjusted to a predetermined temperature passes through the circulation duct 25 and enters the drying oven 4. It is now being supplied to

Furthermore, a shielding mechanism 30 that is extendable and retractable in the front and back directions of the truck 5 is attached to the front of the truck 5. This shielding mechanism 30 includes a holding case 31 that is provided on both sides of the lower part of the cart 5 and has a cavity 31a formed therein, and a support member 32 that is partially slidably accommodated in this holding case 31. A shielding plate 33 is fixed to the tip of the support member 32 and shields the front surface of the automobile body W placed on the trolley 5, and a cover 34 is provided at the tip of the support member 32 and is elastic and heat-resistant. It is made up of. and,
This shielding mechanism 30 has a support member 32 that is attached to the holding case 3.
4, the shielding plate 33 expands and contracts back and forth with respect to the trolley 5, and the distance from the automobile body W is adjusted.

In the coating processing apparatus 1 configured as described above, the trolley 5 transported by the conveyor 17
The upper automobile body W is transported into the painting room 7 from the entrance 7a. The automatic painting machines 20 and 2 in which the automobile body W is disposed on both sides of the painting room 7
When it was transported to location 0a, spray gun 2
1 and 21b, paint is sprayed to form a coating film.

At that time, the shielding plate 33 attached to the front of the trolley 5 is installed in the automatic coating machines 20, 20a during painting.
Carry out the trolley 5 as shown in Fig.
It is said to be extended forward and relatively far away. During painting, most of the paint mist that scatters into the painting chamber 7 without being applied to the automobile body W passes through the filter 9 from the air supply chamber 6 and is supplied into the painting chamber 7. The conditioned air passes through the screen 10 and is discharged into the exhaust chamber 8. Further, some paint mist tends to scatter in the direction of the automobile body W that is being conveyed back and forth, but the shielding plate 33 provided in front of the truck 5
The paint mist is shut off by the exhaust valve 8, and is quickly discharged to the exhaust air vent 8, thereby preventing the paint mist from causing paint defects such as fogging due to the scattered paint mist.

Then, the automobile body W that has been painted is transported to the setting room 3 together with the trolley 5 by the conveyor 17, and transferred to the conveyor 17a.
At the same time, the distance between the carriages 5 and 5 is reduced, and the shielding plate 33 is vertically reduced manually or the like, so that the carriage 5 is closed as shown in FIG.
be close to. And in setting room 3,
The organic solvent is excessively evaporated from the paint film formed on the surface of the automobile body W.

Further, the automobile body W in which the organic solvent has been excessively evaporated is also conveyed into the drying oven 4 together with the trolley 5 by the conveyor 17a. In the drying oven 4, high-temperature air adjusted to a predetermined temperature by the heating device 24 is circulated, and the automobile body W passes therethrough to bake and harden the paint film. When the automobile body W passes through the drying oven 4, the inside of the oven shell 23 is shielded by a shielding plate 33 attached to the front of the truck 5, and the drying oven 4 is opened at both ends. High-temperature air is prevented from flowing out from the outlet, and a portion of the circulating high-temperature air is enclosed by the shielding plate 33, thereby shortening the baking hardening time of the paint film.

Then, the automobile body W on which the paint film has been baked and hardened is conveyed to the next step together with the trolley 5 by the conveyor 17a.

Although the present invention has been described using an embodiment in which the shielding mechanism 30 is attached to the front of the truck 5, the shielding mechanism 30 can also be attached to the rear of the truck 5, or to the front and rear of the truck 5.

〔Effect of the invention〕

As explained above, in the method and apparatus for painting an automobile body, etc. of the present invention, when painting and drying an object to be painted, such as an automobile body, at least the front side of the trolley on which the object to be painted is placed is shielded. This makes it possible to prevent the paint mist that scatters into the painting room from flowing sideways when painting objects to be painted, thereby significantly reducing the amount of air conditioned air supplied into the painting booth. There is an effect that can be done.

In addition, by reducing the supply amount of conditioned air, the energy such as steam and electricity used for air conditioning can be reduced, and the air conditioner can be made smaller. be.

Furthermore, in the present invention, when drying the paint film formed on the object to be painted, the inside of the drying oven is shielded by a shielding mechanism attached to the trolley, and the loading/unloading port is opened at both ends of the drying oven. This has the effect of preventing high temperature air from flowing out.

Furthermore, according to the present invention, a part of the circulating high-temperature air is encapsulated by the shielding mechanism, and the baking hardening time of the coating film formed on the surface of the object to be coated can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view for explaining the painting processing apparatus according to the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3 is a side view during the painting processing according to the present invention. FIG. 4 is a side view of the drying process according to the present invention. 1...Paint processing equipment, 2...Painting booth, 3...
...Setting room, 4...Drying oven, 5...Dolly,
6...Air supply room, 7...Painting room, 7a...Entrance, 7
b...Exit, 8...Exhaust chamber, 9...Filter, 1
0...Bamboo shoots, 11...Air supply fan, 12...Air conditioner, 13...Air supply duct, 14...Exhaust fan, 15...Exhaust duct, 16...Filter,
17, 17a... Conveyor, 18... Dog, 1
9, 19a...Rail, 20, 20a...Automatic painting machine, 21, 21a...Spray gun, 22...
Covering shell, 23... Furnace shell, 24... Heating device, 25
...Circulation duct, 26...Combustion burner, 27...
Circulation fan, 28...damper, 29...exhaust duct, 30...shielding mechanism, 31...holding case, 3
1a...Cavity portion, 32...Supporting member, 33...Shielding plate, 34...Cover.

Claims (1)

[Scope of Claims] 1. A coating treatment method for painting and drying an object to be painted while transporting a trolley on which an object to be painted, such as an automobile body, is placed by a conveying device, the method comprising: A method for painting an automobile body, etc., characterized in that the object to be painted is transported while shielding at least the front side of the object during painting and drying. 2. A painting booth for painting objects to be painted such as automobile bodies, a setting chamber for evaporating organic solvents from the paint film of the object to be painted, a drying oven for drying and curing the paint film, and the object to be painted. A trolley on which is mounted, which can be moved sequentially through the painting booth, the setting room, and the drying oven by means of a conveyance device; 1. A painting processing apparatus for automobile bodies, etc., comprising a shielding mechanism attached to the trolley so as to be expandable and retractable in directions.