JPH086534Y2 - Appropriate temperature air blowing device in painting process - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an appropriate temperature air blowing device in a coating process used for heating and removing heat from a work.

[Prior Art] FIGS. 3 and 4 are views showing a general structure of a conventional appropriate temperature air blowing device, FIG. 3 is a front view, and FIG. 4 is a side view.

In recent years, in order to control pollution, particularly photochemical smog, it is desired to separate and collect evaporating organic solvent without discharging it to the outside of the process, that is, to the outside of the coating device in the coating process using the organic solvent paint. However, in the coating process of large works such as automobile bodies, not only the equipment size and burden of equipment economy are large, but also it is difficult to say that it is a drastic measure. Is being used.

By the way, it is extremely difficult to adjust the spontaneous evaporation rate of the solvent in such a water-based paint by changing the boiling point of the solvent, as compared with the organic solvent paint.

Therefore, in the natural evaporation type, the flash-off process becomes long, which leads to enlargement of equipment and non-uniformity of quality. Therefore, it is proposed to actively heat the work in the flash-off process.

As a heating device used for that purpose, for example, an appropriate temperature air blowing device can be mentioned.

Here, as shown in FIGS. 3 and 4, the proper temperature air blowing device warms the entire room by blowing hot air from a plurality of air blowing nozzles 16 fixedly installed in the work heating chamber 2 through the column 1. As a result, the work W having been coated with the water-based paint, which has been transported to the heating chamber 2 by the transport means 5, is indirectly heated to forcibly evaporate the solvent. Since the heating method using such an appropriate temperature air blowing device heats the entire work heating chamber, it is more uniform than the radiant heating method using a radiant heating plate as disclosed in Japanese Patent Publication No. 52-30170 and the induction heating method. It can be said that this is an excellent heating method because the work W can be heated.

[Problems to be Solved by the Invention] However, since the entire work heating chamber is heated, there is a drawback that thermal efficiency is poor. Therefore, in the case of heating a large work W such as an automobile body, it is necessary to increase the blowing strength of the hot air to further increase the room temperature of the work heating chamber 2, which leads to an increase in the size of the equipment.

Further, when the work W has a portion having a poor heat absorption rate and a portion having a good heat absorption rate, there is a disadvantage that unevenness in drying of the coating is likely to occur.

The object of the present invention is to make the amount of appropriate temperature air from the air blowing means hit each painted surface of the work regardless of the form of the work, and as a result, improve the thermal efficiency and increase the size of the equipment. An object of the present invention is to provide an appropriate temperature air spraying device that can make the coating quality of a work uniform.

[Means for Solving the Problems] In the present invention, the coated surface of the work is focused and heated by blowing a suitable temperature air from the blowing means to the coated surface of the work while keeping the distance between the air blowing means and the work constant ( (Or heat removal) to improve the thermal efficiency.

That is, in an appropriate temperature air spraying device in a coating process including an air spraying means for spraying an appropriate temperature air onto each coating surface of a work conveyed in a predetermined direction, the air spraying means is formed so as to be movable three-dimensionally, Drive means for moving the air blowing means is provided, and form specifying means for specifying the form of the work is provided,
A control means for controlling the driving means is provided so that the distance between the air spraying means and each coated surface of the work is constant based on the form specified by the form specifying means.

[Operation] In the present invention, when the appropriate temperature air (hot air or cold air) is blown to the work from the air blowing means, the shape of the work is specified by the shape specifying means, and the control is performed based on the specified shape. The means moves the air spraying means three-dimensionally by controlling the driving means, and always keeps the distance between the spraying means and each coated surface of the work constant.

As a result, even for a large work such as an automobile body, each coated surface of the work can be heated (or removed) in a focused manner, improving the thermal efficiency and increasing the size of the work without increasing the equipment size. The coating quality can be made uniform.

[Embodiment] FIGS. 1 and 2 are views showing an embodiment of the present invention.
FIG. 1 is a front view and FIG. 2 is a side view.

 An embodiment of the present invention will be described with reference to these drawings.

The suitable temperature air blowing device according to the present invention is formed so as to uniformly blow hot air on the work W. In particular,
The optimum temperature air blowing device is configured such that the air blowing means is movably formed in a three-dimensional manner, the driving means 21 for moving the air blowing means is provided, and the form specifying means for specifying the form of the work W is provided. A control means for controlling the driving means 21 is provided so that the distance between the air spraying means and each coated surface of the work W is constant based on the form specified by the form specifying means. .

More specifically, the appropriate temperature air blowing device includes an air blowing means, a driving means, a form specifying means, columns 11, 11, an elevating part.
12 and the nozzle holding portion 15 and the like.

The same components as those shown in FIGS. 3 and 4 are designated by the same reference numerals, and the description thereof will be omitted or simplified.

Here, the columns 11 and 11 are erected in parallel at a predetermined interval, and an elevating part 12 is provided between the columns 11 and 11 so as to be movable in the vertical direction (Y direction). A nozzle holding portion 15 is supported on the elevating portion 12 via an arm 13 and a shaft 14 so as to be movable in parallel in the horizontal direction (X direction) and rotatable in the arrow R direction. Air blowing means are provided. Therefore, the air blowing means is
It becomes possible to move three-dimensionally. In the present embodiment, the air blowing means is a plurality of air blowing nozzles for blowing hot air.
It consists of 16.

The drive means 21 is a means for moving and driving the air blowing means (16). In the present embodiment, the drive means 21 includes the elevating part 12 in the Y direction, the nozzle holding part 15 in the arm 13 and the shaft.
By moving in the X and R directions via 14, the air blowing nozzle 16 is formed to move three-dimensionally.
Since the driving means 21 is configured by using a known driving mechanism, detailed description thereof will be omitted.

The form specifying means is a means for specifying the form of the work W conveyed by the conveying means 5, and in this embodiment,
It is formed by utilizing a detection unit 25 including an image sensor or a plurality of photoelectric switches, a partial component (a CPU or the like) and a partial function of a control device 31 that drives and controls the entire device. That is, the ON / OFF signal emitted from the detection unit 25 in relation to the work W conveyed by the conveying means 5 is received, and the form of the work W is specified by the control device 31 based on the ON-OFF signal.

Here, the control device 31 is a CP that performs calculations, instructions, execution, etc.
U, ROM for storing various programs, RAM for temporarily storing various data, I / O port having a function of connecting to an external device, and the like are formed.

When the hot air is blown from the air blowing nozzle 16 to the work W, the control means causes the nozzle 16 to work W based on the shape of the work W specified by the shape specifying means (25, 31).
Is a means for controlling the driving means 21 so as to be located above the painted surface by a constant distance H. In the present embodiment, the control means is formed by utilizing a part of the configuration and function of the control device 31.

That is, the control means is formed from the CPU, ROM, RAM, I / O port, etc., and reads the form of the work W and the carrying speed of the carrying means 5 stored in the RAM, and the CPU reads the contour of the work W, that is, an appropriate temperature. The height L of each coated surface (portion W1 in FIG. 2) of the work W conveyed to the air spraying device BP is calculated, and the drive means 21 is controlled via the I / O port to raise / lower part 1
2 (hence the air blowing nozzle 16) is moved up and down so that the distance between the nozzle 16 and each coated surface (W1) of the work W is a constant length H.
It is formed so that.

 Next, the operation will be described.

When the work W is carried by the carrying means 5 at a predetermined carrying speed, the detection unit 25 detects the height (L) of the work W.
To detect. Then, the CPU forming the form specifying means,
The form (contour) of the work W is specified from the relationship between the height (L) and the movement distance of the work W and stored in the RAM.

Next, the CPU forming the control means reads the form of the work W and the transfer speed stored in advance in the RAM and reads the work W from the relationship with the transfer speed, and the work W that has arrived at the air blowing position BP (part W1).
Find the height L of. Subsequently, in order to position the lower end of the air blowing nozzle 16 at a position higher than the height L of the site W1 by a certain distance H, the drive means 21 is controlled via the I / O port to move the elevating unit 12 up and down. And spray nozzle 16
To blow hot air toward the painted surface of the work W.

At this time, since the distance between the nozzle 16 and the work W is always constant, the hot air is uniformly blown to each coating surface of the conveyed work W, so that the coating quality becomes uniform. Also, work W
When there is a portion with poor thermal efficiency and a portion with good thermal efficiency, when the workpiece W portion with poor thermal efficiency reaches the air blowing position BP, the amount of hot air blown from the air blowing nozzle 16 is increased and the workpiece W portion with good thermal efficiency When comes to the spray position BP, the nozzle 16
Reduce the amount of hot air blown out. The control device 31 executes the adjustment of the air blowing amount based on the model number of the work W or the like.

Therefore, according to this embodiment, the air spraying means (air spraying nozzle 16) is formed so as to be movable three-dimensionally, and the driving means 21 for moving the air spraying means (16) is provided, and the work is also provided. Forming means (25, 31) for specifying the shape of W is provided, and the distance H between the air spraying means (16) and each coated surface of the work W is constant based on the shape specified by the shape specifying means. Since the control means (31) for controlling the drive means 21 is provided so that even if it is a large work W, each coated surface of the work W can be predominantly heated, and thermal efficiency is improved. Can be improved. In addition, the air blowing nozzle 16 is moved three-dimensionally to
The distance (H) between 16 and each coated surface of the work W can be reliably maintained constant. As a result, the amount of hot air blown from the air blowing nozzle 16 can be made equal to the amount of contact with the coating surface of the work W, so that the coating quality can be made uniform.

As shown by the chain double-dashed line in FIG. 2, a setting zone or the like in the coating process is provided with the same structure as the above-mentioned appropriate temperature air blowing device, and cool air is blown from the air blowing nozzle 16 to each coated surface of the work W. Heat can be removed by spraying, and the temperature of the coated surface can be adjusted appropriately so as to be suitable for the treatment in the next step.

In the above embodiment, the form specifying means is formed of the detection unit 25 and a part of the configuration / function of the control device 31 (CPU or the like), but the point is that the form (contour) of the work W can be specified. The detection unit 25 is not limited to a photoelectric type or the like for detecting height, and may have a structure for detecting the type of vehicle body (work W), for example.
It is also possible to store the type-specific form of the work W in the ROM, and to specify the form of the work W by the CPU simply by designating the model number with the keyboard.

[Advantage of the Invention] According to the present invention, the air spraying means is formed so as to be movable three-dimensionally, the driving means for moving the air spraying means is provided, and the shape specifying means for specifying the shape of the work is provided. It is provided with a control means for controlling the driving means so that the distance between the air spraying means and each coated surface of the work is constant based on the form specified by the form specifying means. Regardless of the form, it is possible to make the amount of appropriate temperature air from the air blowing means hit the work coating surface the same, and as a result, improve the thermal efficiency and make the work coating quality uniform without increasing the equipment size. You can

[Brief description of drawings]

1 and 2 are views showing an embodiment of the present invention. FIG. 1 is a front view and FIG. 2 is a side view. 3 and 4 are views showing the general structure of a conventional appropriate temperature air blowing device,
FIG. 3 is a front view and FIG. 4 is a side view. 16 ... Air spray nozzle (air spray means), 21 ... Drive means,
25 ... Detection unit (form specifying means), 31 ... Control device (control means, form specifying means).

Claims (1)

[Scope of utility model registration request] 1. An appropriate temperature air spraying device in a coating process, comprising air spraying means for spraying appropriate temperature air onto each coating surface of a work conveyed in a predetermined direction, wherein the air spraying means is formed so as to be movable three-dimensionally. In addition, a drive means for moving the air spraying means is provided, and a shape specifying means for specifying the shape of the work is provided, and each of the air spraying means and the work based on the shape specified by the shape specifying means. An appropriate temperature air spraying device in a coating process, characterized in that a control means for controlling the driving means is provided so that the distance to the coating surface is constant.