JP2004105852A - UV curing equipment - Google Patents

Abstract

An object of the present invention is to provide an ultraviolet curing device capable of obtaining an effective cooling effect of an ultraviolet radiation light source with a small amount of exhaust air in order to prevent a work from rising due to cooling exhaust air. I do.
By disposing a partition plate (17) having a wind direction control unit (18) in a main body of an ultraviolet curing device (11), cooling air passes from below the ultraviolet radiation light source (14) to the outside along the ultraviolet radiation light source (14). From the exhaust duct 12 through the ventilation groove 31. Also, since the amount of cooling air passing through the upper part of the reflector plate has been reduced, the cooling of the ultraviolet radiation light source can be maintained even when the total exhaust air volume is smaller than when the partition plate is flat, and the work is made of thin paper or film. In addition, the work can be prevented from rising.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in an ultraviolet curing device.
[0002]
[Prior art]
As a conventional technique, as described in Japanese Patent Application Laid-Open No. 2000-157925, an ultraviolet curable paint is generally applied as a paint for printing on the surface of a thin paper, a film, a metal plate, or the like, and the paint is cured with an ultraviolet radiation light source. The device is being used.
[0003]
As shown in FIGS. 6 and 7, a flat partition plate 27 is disposed inside the ultraviolet curing device main body 21, the upper half is configured as the exhaust duct 22, and the lower half is configured as the light source storage chamber 23.
[0004]
[Problems to be solved by the invention]
By the way, in the above-mentioned conventional ultraviolet curing device, since the partition plate 27 is flat, cooling air is drawn from near the ultraviolet radiation light source 24 and above and below the reflection plate 25 to cool the ultraviolet radiation light source 24. The exhaust air volume required for cooling the radiation light source 24 is larger than the exhaust air volume required.
For this reason, in the case of the ultraviolet curing device, for example, when the work is a thin paper or a film, there is a disadvantage that the work is raised by the exhaust air for cooling of the ultraviolet curing device.
[0005]
In the past, the exhaust air flow was reduced to prevent the workpiece from rising. However, there was a risk that the lamp and the reflector would be deformed due to insufficient cooling. In addition, the shortage of light emission and short life caused by the temperature rise of the lamp were also caused.
[0006]
The present invention has been made in view of the above points, and an object of the present invention is to provide an ultraviolet curing device capable of obtaining an effective cooling effect even with a small exhaust air volume.
[0007]
[Means for Solving the Problems]
The present invention has the following configuration to solve the above problems.
The invention according to claim 1 has a straight tube type ultraviolet radiation light source mounted inside the ultraviolet curing device main body, and a reflector plate member configured to be openable and closable with respect to the ultraviolet radiation light source. I have. The reflector plate is divided into two parts, and a ventilation hole is formed between the upper ends of the two parts of the reflector. In addition, a partition plate having a wind direction control unit is arranged close to the ventilation hole, and the ventilation direction control unit forms a ventilation groove. The cooling air passes from below the ultraviolet radiation light source to the outside along the ultraviolet radiation light source, and is further discharged from the ventilation holes to the exhaust duct through the ventilation grooves.
[0008]
According to the second aspect of the present invention, the wind direction control portion of the partition plate is formed in a mountain shape, and a large number of ventilation grooves are formed in the mountain wall surface at equal intervals.
[0009]
According to the third aspect of the present invention, the wind direction control unit of the partition plate is disposed close to the distance such that the cooling wind passes through the outside of the ultraviolet radiation light source while being cooled strongly.
[0010]
The invention according to claim 4 is configured such that a water cooling mechanism is used in combination with the reflection plate equipment.
[0011]
According to the present invention described above, by disposing the partition plate having the wind direction control unit, the cooling air passes through the outside along the ultraviolet radiation light source from below the ultraviolet radiation light source, passes through the ventilation groove from the ventilation hole, and the exhaust duct. Is discharged. Also, since the amount of cooling air passing through the upper part of the reflector is reduced, the cooling of the ultraviolet radiation light source can be maintained even when the total amount of exhaust air is smaller than when the partition plate is flat, and even when the work is thin paper or film. There is a special effect that can prevent the work from rising.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
In FIG. 1, reference numeral 11 denotes an ultraviolet curing device main body, which is formed in a box shape. The ultraviolet curing device main body 11 has an exhaust duct 12 in substantially the upper half, and a light source storage chamber 13 in the substantially lower half.
[0013]
Reference numeral 14 denotes a straight tube type ultraviolet radiation light source mounted inside the light source storage chamber 13, and is constituted by using, for example, a 17.6KW metal halide lamp.
[0014]
Reference numerals 15a and 15b denote reflector plate members which are configured to be openable and closable with respect to the ultraviolet radiation light source mounted inside the light source storage chamber 13, and are configured to be divided into two parts.
[0015]
Further, the reflection plate devices 15a and 15b are configured using dichroic mirrors. In the dichroic mirror, metal oxide is applied to the surface of the reflection plate device on the side of the ultraviolet radiation light source. When a dichroic mirror is used, heat rays are transmitted and ultraviolet rays are reflected, so that the workpiece is not affected by high heat, and the paint or ink on the workpiece surface can be cured by the ultraviolet rays.
[0016]
Reference numeral 16 denotes a ventilation hole formed by the reflecting plate members 15a and 15b divided into two, and is configured to allow cooling air to pass therethrough. Reference numeral 18 denotes a wind direction control unit disposed in the vicinity of the ventilation hole 16 at the upper end of the two-part reflecting plate equipment 15a and 15b. In FIG. 5, reference numeral 31 denotes a rotary actuator which opens and closes the reflection plate devices 15a and 15b by air pressure.
[0017]
The wind direction control unit of the partition plate is formed in a mountain shape, for example, as shown at 18 in FIG. As shown in FIG. 5, a large number of ventilation grooves 41 are formed at equal intervals on the wall surface of the wind direction control unit. A large number of the ventilation grooves 41 are formed in the wind direction control unit 18 and have a size of, for example, about 15 mm in length and about 12 mm in width in the longitudinal direction. The ventilation grooves 41 are formed at intervals of about 25 mm.
[0018]
With this configuration, the cooling air passes from below the ultraviolet radiation light source to the outside along the ultraviolet radiation light source, and is further discharged outside through the ventilation holes through the ventilation grooves.
[0019]
By the way, the control unit of the partition plate is arranged at a distance close to the ultraviolet radiation light source so that the cooling air passes through the outside of the ultraviolet radiation light source while being cooled strongly.
[0020]
For example, the distance between the outer wall of the light source and the top of the wind direction control unit is 6.7 mm, the width of the ventilation hole is 10 mm, the distance between the wind direction control unit and the peripheral wall of the ventilation hole is 1.5 mm, and a straight tube type ultraviolet radiation light source. With the shutter open and the rated output of the UV radiation source constant at 17.6 kW.
[0021]
Considering the luminous efficiency and the life of the ultraviolet light source, 850 ° C. to 900 ° C. is considered to be good. Thus, for example when the temperature of the ultraviolet radiation source was set at about 880 ° C., but when the partition plate is plane's total exhaust air volume required about 15.0 m ³ / min, the partition plate when the chevron about 13.0m ³ / min, the total exhaust air volume of 10% to 20% can be suppressed, and the work can be applied to a heavy work such as a metal plate or wood.
[0022]
The work conveyed by the conveyor includes, for example, paper coated with an ultraviolet curable paint. The distance between the work and the ultraviolet radiation light source is about 40 mm to 50 mm.
[0023]
Next, a structure in which cooling water is supplied to the reflector plate member 15 in the ultraviolet curing device shown in FIG. 1 will be described with reference to FIG. As shown in the figure, a flowing water channel is provided so that cooling water flows through 19. With this configuration, when the temperature of the ultraviolet radiation light source is, for example, 880 ° C., the total exhaust air volume when the partition plate has a mountain shape is 9.8 m ³ / min.
[0024]
Therefore, the total exhaust air volume can be reduced by about 30% as compared with the ultraviolet curing apparatus shown in FIG. 1, and the present invention can be applied to lightweight work such as paper and plastic.
[0025]
Further, from the above, when the wind direction control unit of the partition plate is formed in a mountain shape, the total exhaust air volume can be suppressed by 20 to 30% by configuring the water cooling mechanism as compared with a structure having no water cooling mechanism. .
[0026]
【The invention's effect】
According to the above-described ultraviolet curing device, by disposing the partition plate having the wind direction control unit, even when the total exhaust air volume is smaller than when the partition plate is flat, the amount of cooling air passing through the upper portion of the reflector plate is reduced. Has the special effect that the temperature of the UV radiation source can be maintained at an optimal temperature of 850 ° C. to 900 ° C.
[0027]
Further, even if the work is thin paper or film, there is a special effect of preventing the work from rising.
[Brief description of the drawings]
FIG. 1 is a front view of an ultraviolet curing device according to the present invention.
FIG. 2 is a front view showing a flow of wind when the reflector plate device is in an open state in the ultraviolet ray effect device shown in FIG. 1;
FIG. 3 is a front view of the ultraviolet curing device shown in FIG. 1, in which a water-cooling mechanism is provided in the reflector plate.
FIG. 4 is a sectional view from the side of the ultraviolet curing device shown in FIG. 1;
FIG. 5 is a top view of a partition plate and a wind direction control unit.
FIG. 6 is a front view of a conventional ultraviolet curing device.
FIG. 7 is a front view showing the flow of wind when the reflector plate device is in an open state in the ultraviolet ray effect device shown in FIG. 6;
[Explanation of symbols]
11, 21 ... apparatus main body 12, 22 ... exhaust duct 13, 23 ... light source storage chamber 14, 24 ... ultraviolet radiation light source 15a, 15b, 25 ... reflector plate equipment 16, 26 ... · Ventilation holes 17, 27 · · · Partition plate 18 · · Wind direction control unit 19 · Water cooling mechanism 31 · · Rotary actuator 41 · Ventilation grooves

Claims (4)

It has a straight tube type ultraviolet radiation light source mounted inside the ultraviolet curing device main body, and a reflector plate device configured to be openable and closable with respect to the ultraviolet radiation source, and the reflector plate device is divided into two parts. A ventilation hole is formed between the upper ends of the two reflectors, and a partition plate having a wind direction control unit is disposed near the upper portion of the ventilation hole. A groove is formed, and the cooling wind is configured to pass from the lower side of the ultraviolet radiation light source to the outside along the ultraviolet radiation light source, and to be further discharged outside through the ventilation groove from the ventilation hole. Curing equipment. 2. The ultraviolet curing device according to claim 1, wherein the wind direction control section of the partition plate is formed in a mountain shape, and furthermore, a large number of ventilation grooves are formed at equal intervals on the wall surface of the mountain shape. The ultraviolet curing according to claim 1 or 2, wherein the control unit of the partition plate is disposed at a distance close to the ultraviolet radiation light source so that the cooling wind passes through the outside of the ultraviolet radiation light source while being cooled. apparatus. 4. The ultraviolet curing apparatus according to claim 1, wherein the reflector plate is configured by using a water cooling mechanism.

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