JPH05293422A - Apparatus for drying repairing coating film - Google Patents

Abstract

PURPOSE:To efficiently dry a repairing coating part without exerting the effect of heat on the circumference. CONSTITUTION:A feed means 4 feeding a work W to which repairing coating is partially applied is laid throughout the drying chambers 121, 122 in a drying oven 11 and a large number of far infrared heaters 15 parallelly arranged along the inner surfaces of the drying chambers 121, 122 are individually connected to a large number of the drive means 16 provided to the inner surfaces of the drying chambers 121, 122 so as to come close to or separate from the work W in the drying chambers 121, 122.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying device for a repair coating film partially applied to a work such as an automobile.

[0002]

2. Description of the Related Art Conventionally, a plurality of infrared heaters and far infrared heaters are arranged in a panel box supported on a trolley, and infrared heaters and far infrared heaters are selected according to the shape and size of a repair coating portion. Japanese Patent Application Laid-Open No. 59-131876 discloses that the repair coating is dried.

[0003]

However, in the above-mentioned conventional one, when there are a plurality of works or a plurality of repair coating parts for a single work, the panel box is moved to the corresponding place. It is necessary to make it troublesome. Moreover, it is difficult to always set the space between the repair painting part and the panel box to the optimum value, and it is also difficult to keep the ambient temperature of the repair painting part always constant during drying. The dried state is different, and the appearance of the work after the drying process may be impaired.

By the way, a coating drying furnace in which a large number of heat source devices such as infrared lamps and infrared heaters are arranged side by side on the inner surface of the drying furnace and the radiation intensity of each heat source device can be controlled is disclosed in Japanese Patent Laid-Open No.
Japanese Patent Laid-Open No. 115467 discloses that, when the repair coating film is dried by using such a coating drying furnace, it is not necessary to move the heat source device according to the work and the ambient temperature is constant. It is possible to keep However, since the heat source equipment is fixed to the inner surface of the drying oven,
It is difficult to prevent thermal influence from affecting the area around the repair coating, and if the radiation intensity is reduced to eliminate the thermal influence, the drying process will take time.

The present invention has been made in view of the above circumstances, and provides a repair coating film drying apparatus capable of efficiently drying a repair coating portion without affecting the surroundings with heat. The purpose is to

[0006]

In order to achieve the above object, according to the invention of claim 1, a conveying means for tact conveying a work partially repair-painted is dried in a drying oven. A large number of far-infrared heaters laid through the chamber and arranged in parallel along the inner surface of the drying chamber are provided on the inner surface of the drying chamber to enable the far-infrared heaters to move toward and away from the work in the drying chamber. It is individually connected to the driving means.

According to the second aspect of the invention, in addition to the configuration of the first aspect of the invention, a plurality of drying chambers lined up in the carrying direction of the carrying means are provided between the drying furnaces. It is formed with a partition interposed, and the partition is provided with an opening that allows the movement of the work.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a drying apparatus, and FIG. 2 is FIG.
2-2 is an enlarged cross-sectional view taken along line 2-2 of FIG. 3, and FIG.

First, in FIG. 1, a coating booth (not shown) and a drying oven 1 _{1 connected} to the coating booth are provided on the floor surface 5.
Conveying means 4 that passes through and in sequence along the conveying direction 3 is laid, and the automobile as the work W is tact-conveyed by the conveying means 4. Thus to within the painting booth, the repair coating part M of the workpiece W which is determined in position repair coating is applied, then coating the coating of the repair coating part M is dried in the drying furnace 1 ₁ Will be.

Referring also to FIG. 2, the conveying means 4 comprises a pair of rails 6 and 6 laid on the floor surface 5, a plurality of carriages 7 capable of traveling on both rails 6 and 6, and A drive means (not shown) for causing the trolleys 7 to travel is provided, and a work W to be repair-coated is placed on each trolley 7.

[0012] drying furnace 1 _1, an inlet 9 which is closed by an openable door 8 is provided on the upstream end along the conveying direction 3 of the conveyor means 4, an outlet 11 which is closed by an openable door 10 provided on the downstream end along the conveying direction 3, the conveying means 4, drying oven 1 ₁ across between inlet 9 and outlet 11
It is laid so as to pass inside. Moreover, in the drying furnace 1 ₁ , a first drying chamber 12 ₁ communicating with the inlet 9 and a second drying chamber 12 ₂ communicating with the outlet 11 are formed with a partition wall 13 interposed therebetween. An opening portion 14 is provided in the inner wall 14 to allow the work W conveyed by the conveying means 4 to move from the first drying chamber 12 ₁ to the second drying chamber 12 ₂ .

First and second drying chambers 12₁, 12₂Within
Is their drying room 12₁, 12₂Work W inside
A large number of far-infrared heaters 15 facing each other ...
12 ₁, 12₂Are arranged in parallel along the inner surface of each
Far-infrared heater 15 ... is the drying chamber 12₁, 12₂Inside
Are installed in parallel and fixed as
The cylinders 16 are individually connected. Ie each air
The cylinder 16 has its piston rod 17 inward.
And drying oven 1₁Each drying room 12₁, 12 ₂Inside
Is fixed to each far infrared heater 15 ...
The tip of the piston rod 17 in the air cylinder 16
Fixed at each end.

In FIG. 3, the energization of electric power for each far infrared heater 15 ... And the expansion / contraction operation of each air cylinder 16 ... Are individually controlled by a control means 18 comprising a computer. That is, the pressurized air supply source 19 and each air cylinder 1
.. are respectively provided between the solenoid valves 20, and the power control circuits 22 are provided between the power source 21 and the far-infrared heaters 15. , And the power control circuit 22 are individually controlled by the control means 18. Moreover, the control means 18 is connected to the information input unit 23 for inputting various information of the work W, that is, the shape, size, the repair coating color of the work W, the position of the repair coating part M, etc. The means 18 controls the electromagnetic valves 20 ... And the power control circuits 22 ... Corresponding to the drying chambers 12 ₁ and 12 ₂ based on the information input from the information input unit 23.

Next, the operation of this embodiment will be described. The work W having the repair coating M applied with repair coating is first introduced into the first drying chamber 12 ₁ of the drying furnace 1 ₁ and temporarily stopped. And Thus, in the first drying chamber 12 within _1, an air cylinder 16 corresponding to the repair coating part M of the workpiece W, and extending action as shown in Figure 2, adapted to repair coating conditions refinish portion M distance The far-infrared heater 15 is brought close to the repair coating section M, and the far-infrared heater 15 is energized in this state to dry the repair coating section M.

Further, the repair coating section M in the first drying chamber 12 ₁
After completion of the drying of the work W, the work W is guided into the second drying chamber 12 ₂ , and in this second drying chamber 12 ₂ as well as the first drying chamber 12 ₁ , the work W corresponding to the repair coating section M of the work W is removed. The infrared heater 15 is brought close to the repair coating part M, and the repair coating part M is dried in the close state.

By the way, for example, when the coating film is dried at 140 to 150 ° C. for about 20 to 30 minutes, the temperature of the coating film is 140 to 1 in the ordinary drying with hot air.
It takes about 10 to 15 minutes to raise the temperature to 50 ° C, but if heat treatment is performed with the far-infrared heater 15 having a wavelength suitable for the absorption wavelength band of the repair coating film, rapid heating in 5 to 7 minutes It is possible to raise the temperature. Therefore, when the drying processing temperature is set to 150 ° C., the temperature rising time to 150 ° C. is set to 7 minutes, and the drying processing time is set to about 20 to 21 minutes, the tact conveyance of the work W by the conveying means 4 is performed every 14 minutes. Try to do it. That way, in the first drying chamber 12 _1, and maintains the state of 7 minutes only 0.99 ° C. After raising the temperature at 7 minutes 0.99 ° C., then the state of 0.99 ° C. In the second drying chamber 12 within ₂ 14
By maintaining the amount, the drying of the repair coating film can be completed.

Thus, the far-infrared heater 15 is brought close to a distance suitable for the condition of the repair coating part M, and the repair coating part M is dried without heat influence on the periphery of the repair coating part M. It can be done efficiently. At this time, the first and second drying chambers 12 ₁ and 12 ₂ are adjacent to each other with a partition wall 13 having an opening 14 having a size allowing the movement of the work W interposed therebetween. Since the atmospheric temperature in each of the drying chambers 12 ₁ and 12 ₂ can be kept substantially constant, the appearance of the work W after the drying process is not damaged.

As a second embodiment of the present invention, as shown in FIG. 4, the first and the second are arranged along the conveying direction 3 of the conveying means 4.
And the third drying chambers 12 ₁ , 12 ₂ and 12 ₃ in the drying furnace 1 ₂
The cycle of the tact transportation by the transportation means 4 can be further shortened as the number of drying chambers is increased. That is, the drying conditions are shown in FIGS.
When the same as the embodiment of FIG.
It can be minutes. As a result, the time during which the transporting means 4 is stopped can be shortened, so that the waiting time for the repair coating process in the coating booth (not shown) can be shortened.

Further, as shown in FIG. 4, even if the repair coating sections M ₁ , M ₂ and M ₃ are set at different portions of the work W, they are repaired in the respective drying chambers 12 ₁ , 12 ₂ and 12 ₃ . The far-infrared heater 15 and the air cylinder 16 corresponding to the coating parts M ₁ , M ₂ and M ₃ are selected to dry the repair coating part M at the same location.
Similar to the embodiment of FIG. 3, each repair coating part M ₁ , M ₂ , M ₃
Only can be efficiently dried.

Even if a single work W is provided with a plurality of repair coating parts, it is possible to efficiently dry only the repair coating parts in the same manner as in the above-mentioned embodiments.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various small design changes can be made without departing from the present invention described in the claims. Is possible.

For example, hot air may be blown into the drying furnaces 1 ₁ and 1 _{2 for} the purpose of ventilation of paint vapor generated at the time of drying and for the purpose of assisting heating. It is set to the extent that it does not reach.

[0024]

As described above, according to the first aspect of the invention, the conveying means for tact conveying the partially repaired work is laid through the drying chamber in the drying furnace and dried. A large number of far-infrared heaters arranged in parallel along the inner surface of the chamber are individually connected to a large number of driving means provided on the inner surface of the drying chamber to enable the far-infrared heaters to move toward and away from the work in the drying chamber. Therefore, the repair coating can be dried efficiently without affecting the parts other than the repair coating, and the ambient temperature can be kept almost constant, which may impair the appearance after the drying process. Absent.

According to a second aspect of the present invention, in addition to the structure of the first aspect of the invention, a plurality of drying chambers lined up in the conveying direction of the conveying means are provided in the drying furnace. Since the partition wall is provided with an opening for allowing the movement of the work, in addition to the effect of the invention of claim 1, the cycle of the tact transportation by the transportation means is shortened, and before the drying treatment. It is possible to shorten the waiting time before and after the drying process such as repair painting.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a drying device according to a first embodiment.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is a diagram showing a configuration of a control device.

FIG. 4 is a vertical sectional view corresponding to FIG. 1 of the second embodiment.

[Explanation of symbols]

1 ₁ , 1 ₂ Drying furnace 3 Transport direction 4 Transport means 12 _{1 to} 12 ₃ Drying chamber 13 Partition wall 14 Opening 15 Far infrared heater 16 Air cylinder as driving means W Work

Claims (2)

[Claims] 1. A conveyance means (4) for tact conveyance of a work (W) partially repaired and coated is a drying furnace (1).
A large number of far-infrared rays that are laid through the drying chambers (12 ₁ , 12 ₂ , 12 ₃ ) inside the ( ₁ , 1 ₂ ) and are arranged in parallel along the inner surface of the drying chambers (12 ₁ , 12 ₂ , 12 ₃ ). Heater (1
5), the drying chamber (12 _1, 12 _2, 12 drying chamber as possible the approach to and separate from the operation of the far-infrared heaters ₃₎ of the workpiece (W) (15) (12 _1, 12 _2, 12 ₃₎ A repair coating film drying apparatus characterized in that it is individually connected to a large number of driving means (16) provided on the inner surface. 2. A plurality of drying chambers (1) arranged in a line in the transfer direction (3) of the transfer means (4) in the drying furnace (1 ₁ , 1 ₂ ).
2 ₁ , 12 ₃ , 12 ₃ ) are formed by interposing a partition wall (13) between each other, and the partition wall (13) is provided with an opening (14) for allowing movement of the work (W). The repair coating film drying device according to claim 1.