JPS6034773A - Method and device for painting treatment of automotive body or the like - Google Patents

Abstract

PURPOSE:To decrease the feed rate of the conditioning air in a painting booth and to prevent the heat loss from a drying furnace in the stage of painting and drying the automobile placed on a carriage by transferring the material to be painted while shielding at least the front of said material. CONSTITUTION:An qutomotive body W on a carriage 5 conveyed by a conveyor 17 is conveyed throught the inlet 7a of a painting chamber 7 to the inside. Said body is then painted by a spray gun. The greater part of the paint mists flow through a screen 10 and are discharged to a discharge chamber 8. On the other hand, a part of the paint mists are going to scatter in the direction of the body W conveyed before and behind the same, but are shielded by a shielding plate provided in front of the carriage 5. The generation of a painting defect such as fogging or the like occuring in the partly scattering paint mists is prevented. The shielding plate is then reduced in a setting chamber and is approached to the carriage. The carriage enters a drying furnace where the outflow of the air through the inlet and outlet is prevented and the painting is baked.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating treatment method and apparatus for coating and drying automobile bodies and the like.

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 a traditional painting boom.

Since multiple objects are being painted at the same time and with different colors of paint, the paint mist from one different color is scattered inside the painting booth and is being transported around 9. +1 mark on the surface and paint defects such as fogging occur.

I hesitated and increased the amount of air supply to the mounting booth. This prevents the paint grass from adhering to the object to be coated, which is being conveyed at a distance of about 11 times beyond the scattering range of the 1I4E paint. For this reason.

Not only does this increase the amount of conditioned air supplied, but it also causes the problem of consuming a large amount of energy such as steam and electricity for air conditioning.

In addition, the drying oven has openings at both ends through which the object to be coated exits, so that when the object to be coated is brought in,
The hot air inside the drying oven flows out from the opening along the object to be coated,
There is a problem that causes a large amount of heat loss.

The present invention was made to solve the above-mentioned problems, and its purpose is to shield at least the front side 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. By.

An object of the present invention is to provide a coating processing method and an apparatus therefor, which can reduce the amount of conditioned air supplied into a coating booth and prevent heat loss from a drying oven.

In the method for painting automobile bodies, etc. according to the present invention,
A painting processing method in which 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 conveyor pupil, and the object to be painted, such as an automobile body, is painted. It is characterized by transporting the object to be coated while shielding at least the front side during drying and drying.In addition, in a coating treatment device for automobile bodies, etc., the conveyor device transfers the object to be coated, such as automobile bodies, etc. A coating processing device configured to paint and dry an object to be coated while transporting a trolley on which the object is placed, and at least in front of the trolley on which the object to be coated, such as an automobile body, is placed. The present invention is characterized in that a shielding mechanism that is extendable and retractable in the front and rear directions of the trolley is attached, and the object to be coated is placed on the trolley for painting and drying.

9. The painting process in the present invention includes a painting process in which a paint film is formed by spraying the paint film on the surface of a sealed bag for individual automobiles, and a drying process in which the paint film formed on the surface of a 1m-painted product is baked and hardened. It includes a process.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a diagram for explaining the coating processing apparatus according to the present invention.
tl sectional view, FIG. 2 is a sectional view taken along the l-1 line in FIG. 1, FIG. 3 is a side view during the painting process in the present invention, and FIG. 4 is a side m1 view during the drying process in the present invention. shows. In FIGS. 1 to 4, reference numeral 1 denotes a coating processing apparatus, and this coating processing apparatus 1 is.

Paint booth 2. It consists of a setting chamber 3 and a drying oven 4, which are formed in series.

A trolley 5 carrying a car body W (an object to be painted) of 1N passes through with its central portion facing in the longitudinal direction.

The space inside the painting booth 2 consists of an air supply room 6°, a painting room 7
and exhaust chamber 8, and air supply chamber 6.
The painting room 7 and the painting room 7 are separated by a filter 9 for removing fine dust, and the painting room 7 and the air chamber 8 are separated by a screen 10 as a border. 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 fan 14 is connected to the exhaust chamber 8.
An exhaust duct 15 is connected to the exhaust duct 15.

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 this filter 16.

In addition, a conveyor 17 serving as a conveying device is installed on the top surface of the bamboo basket 10 toward the central longitudinal direction of the painting room 7.
This conveyor 17 is provided with a plurality of dogs 18 which are hooked onto a cart 5 on which an automobile body W, which is a bag, is placed and transported.゜19a has been laid, and this rail 1
9 and 19a are designed to guide the cart 5. In addition, an automatic coating machine 20 is installed on the side of both rails 19 and 19a.
゜20a is installed, and this automatic coating machine 20゜20
8 is provided with spray cans 21 and 21a for applying paint Il and si toward the automobile body W.

Further, the sending chamber 3 is formed continuously with the crashing chamber 7 by the cover shell 22, and a painting chamber 7 is provided in the center thereof.
Drying oven 4
A conveyor 17a is installed. and,
This 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 connected to the setting chamber 3 by the oven shell 23.
A conveyor 17a continuing from the setting chamber 3 is installed in the center thereof. Further, a heating device 24 is provided at the upper part of the furnace shell 23 to maintain the inside of the casing 4 at a predetermined temperature. This heating device 24 has two
A combustion burner 26 and a circulation fan 27 are provided in the middle of a circulation duct 25 whose both ends are open into the casing 4.

The exhaust duct 29 is provided upstream of the circulation duct 25 and includes a damper 28 in the middle thereof. Air in the drying oven 4 is introduced into the combustion burner 26 by the operation of the circulation fan 27, and a high temperature adjusted to a predetermined temperature is supplied to the drying oven 4 through the air circulation duct 25. It is now possible to do so.

In addition, a shielding mechanism 30 is attached to the front of the nine-carriage 5, which is extendable and retractable in the front-rear direction of the cart 5. This shielding mechanism 30 is provided on both sides of the lower part of one truck 5, and is provided in the hollow portion 31.
A holding case 31 in which a is formed, a support member 32 that is partially slidably accommodated in this holding case 31, and a car that is fixed to the tip of this support member 32 and placed on a bogie 5. It consists of a shielding plate 33 that shields the front surface of the vehicle body W, and a retractable and heat-resistant cover 34 provided at the tip of the support member 32. In this shielding mechanism 30, the supporting member 32 slides back and forth within the holding case 31, and the shielding plate 33 expands and contracts with respect to the truck 5 after nIJ, so that the distance from the automobile body W is adjusted.

In the painting processing apparatus 1 configured as described above, the automobile body W on the trolley 5 that has been transported by the conveyor 17 is transported into the painting room 7 from the entrance lower a. Then, when the automobile body W is transported to the automatic coating machines 20 and 20a arranged on both sides of the painting room 7, paint is sprayed by the spray guns 21 and 21a to form a coating film. .

At that time, a shielding plate 33 attached to the front of one bogie 5
is extended in front of the trolley 5 and positioned relatively far away, as shown in FIG. 3, so as not to interfere with the automatic coating machines 20, 208 during painting.

Of the paint mist that scatters in the painting chamber 3 without being applied to the automobile body W during painting, most of the paint mist passes through the filter 9 from the air supply chamber 6 and is supplied into the painting chamber 7. Due to the nitrogen-like air produced, the air passes through the screen 10 and is discharged into the exhaust chamber 8. Further, some of the paint mist tends to scatter in the direction of the automobile body W that is being conveyed back and forth.

It is blocked by a shielding plate 33 provided in front of the truck 5, and is quickly discharged into the exhaust chamber 8, and the occurrence of coating defects such as fogging due to scattered paint mist is prevented.

Then, the automobile body W that has been painted is conveyed to the conveyor 17.
is transported to the setting room 31 together with the trolley 5, transferred to the conveyor 17a, and the distance between the trolleys 5 is reduced, and the 4-shielding plate 33 is manually reduced and brought close to the trolley 5 as shown in FIG. . In the setting chamber 3, the organic solvent is appropriately 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 appropriately evaporated, is 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 circulates, through which the own IMJJ motorcycle body W passes and the paint film is baked and hardened. When the automobile body W passes through the drying furnace 4, the inside of the furnace shell 23 is shielded by a shielding plate 33 attached to the front of the truck 5, and large-sized exits are opened at both ends of the drying furnace 4. In addition to preventing high-temperature air from flowing out, a portion of the circulating high-temperature air is encapsulated by the shielding plate 33, thereby shortening the baking hardening time of the paint film.

Then, the automobile body W whose paint film has been baked and hardened is conveyed to the next process along with the 18 cars 5 by the conveyor 7a.

Note that in the present invention, a shielding mechanism 30 is provided in front of the two vehicles 5.
The explanation has been given by way of an example in which a

It is also possible to attach the shielding mechanism 30 to the rear of the truck 5 or to the front and back of the truck 5.

As explained above, 1. In the method and apparatus for painting automobile bodies, etc. of the present invention, when painting and drying bankruptcy bags such as automobile bodies, the slope of the trolley on which the 1M coating bag is placed is also located at the front. By shielding the air, it is possible to prevent the horizontal flow of obstetric mist that scatters into the painting room when painting the object to be painted, which greatly reduces the supply of air conditioned air supplied to the painting booth. There is an effect that can be reduced.

Furthermore, by reducing the number of air supply claws for conditioned air, it is possible to reduce energy such as steam and electricity used for air conditioning, and the air conditioner can be made smaller.

Furthermore, in the present invention, when drying the coating film formed on the object to be coated, the interior of the drying oven is shielded by a shielding mechanism attached to one truck.

This has the effect of preventing high-temperature air from flowing out from the loading/unloading ports opened at both ends of the drying oven.

Furthermore, according to the present invention, a part of the circulating high-temperature air is encapsulated by the shielding mechanism, thereby shortening the baking time of the paint film formed on the surface of the object to be painted.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the process for explaining the painting processing apparatus according to the present invention, Figure 2 is a sectional view taken along line 1-■ in Figure 1, and Figure 3 is a sectional view of the painting process in the present invention. Side σr+ +m
+FIG. 4 is a side view during drying treatment in the present invention. 1...Paint processing equipment, 2...Painting booth. 3... Setting room, 4... Drying oven, 5... Cart. 6...Air supply room, 7...Painting room, 7a...Entrance. 7b...Outlet, 8...(Non-air chamber, 9...Filter. 10...Bamboo shoots, 11...Air supply) 7n. 12...Air conditioner, 13...Air supply duct. 14...Exhaust fan, 15...Exhaust tact. 16...filter, 17; 17a...conveyor. 18...Dog, 19.19&...Rail. 20.20a...Automatic painting machine. 21.21a...Spray gun, 22...Cover shell. 23... Furnace shell, 24... Heating device, 25... Circulation duct. 26... Combustion burner, 27... Circulation fan. 28...Damper, 29...Exhaust tact. 30... Shielding mechanism, 31... Holding case. 31a...Cavity part, 32...Supporting member. 33... Shielding plate, 34... Cover Applicant Toyota Motor Corporation Figure 1 Figure 2

Claims (1)

[Claims] (1) A painting treatment method in which 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. A method for unloading an automobile body, etc., characterized in that the object to be painted is transported while shielding at least the front side during painting and drying. ■) A coating processing apparatus a configured to paint and dry an object to be painted while transporting a cart on which an object to be painted, such as an automobile body, etc., is placed by a conveying device, the apparatus An automobile characterized in that a shielding mechanism is installed at least in front of a trolley on which the object to be painted is placed (R), and is expandable and retractable in the N+1 rear direction of the trolley, and the object to be painted is placed on this trolley for painting and drying. Paint processing equipment for car bodies, etc.