JPH079636Y2 - UV irradiation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of an ultraviolet irradiation device used in the fields of printing, painting, bonding and the like.

[Conventional technology]

In recent years, an ink (so-called UV ink) which is cured by being irradiated with ultraviolet rays has been widely used in printing fields such as stickers and labels, and in a coating field for coating the surface of wood and plastic molded products.

In order to cure the UV ink, for example, as shown in FIG. 4, a main reflector 2 and an ultraviolet curing light source 3 are supported inside the irradiation device body 1, and at the lower end of the irradiation device body 1. ,
The heat ray cut filter 4 is provided, and the work 6 is positioned on the lower surface of the auxiliary reflection plate 5 and the surface of the work 6
It is configured to cure UV ink.

[Problems to be solved by the device]

By the way, according to the ultraviolet irradiation device shown in FIG. 4, there is a large amount of ultraviolet light in the direction directly below the ultraviolet curing light source 3 and in the range where the reflectance from the reflector is high, and the uniformity of the upper surface of the work is poor.
There is a drawback that the curing of the ink becomes uneven.

In addition, it may be desired to change the ultraviolet intensity depending on the type of the work, but there is a drawback that the work cannot be adjusted.

[Purpose of device]

The present invention was devised in view of the above points, and an ultraviolet irradiation device capable of averaging the ultraviolet intensities on the upper surface of a work, making the curing of UV ink uniform, and easily adjusting the ultraviolet intensity and the integrated light amount. The purpose is to provide.

[Means for Solving the Problems]

The present invention has the following configuration in order to solve the above problems. The irradiation device main body is supported by a box-shaped outer body having a work placement portion so as to be vertically movable.

Further, an ultraviolet curing light source and a reflector having a rotating shirt mechanism mounted therein are supported in the irradiation apparatus main body.

Further, at the lower end of the irradiation device body, a reflection box having diffused reflection surfaces on both inner surfaces in the longitudinal direction of the light source is provided.

Furthermore, it is located below the light source of the irradiation device main body, and is provided with a heat ray cut filter and a light quantity adjuster to average the ultraviolet intensity and integrated light quantity of the surface of the work, and to evenly cure the UV ink. Is.

[Action]

According to the above-described ultraviolet irradiation device, the lower end of the irradiation device main body is provided with the reflection box having the inner surfaces on both sides in the longitudinal direction of the light source as irregular reflection surfaces, so that the ultraviolet rays from the ultraviolet curing light source are irregularly reflected, It is possible to disperse the concentration in a specific range, average the ultraviolet intensity of the surface of the work,
Cure UV ink uniformly.

Further, since the irradiation device main body is configured to be movable up and down and the intensity adjusting body is provided below the light source, it is possible to easily adjust the ultraviolet intensity and the integrated light amount on the work surface. It is possible to irradiate an appropriate amount of ultraviolet light according to the type of work.

〔Example〕

The present invention will be described below with reference to FIGS. In the figure, 11 is a box-shaped outer body having a work mounting portion, 12 is an irradiation device main body configured to be vertically movable inside the outer body 11,
13 is a main reflector mounted inside the irradiation device main body 11, 14
Is an ultraviolet curing light source that is mounted and supported inside the main reflector 13, and is constituted by using, for example, a 120 watt metal halide lamp. 16 is a filter provided at the lower end of the irradiation device main body 12, which cuts heat rays,
It is configured to transmit ultraviolet rays. Reference numeral 17 is a drive shaft for moving up and down the irradiation device main body 12, and 18 is a handle for moving up and down the drive shaft 17. Numeral 19 is a strength adjuster provided below the ultraviolet curing light source, for example, a plurality of stainless steel nets having different eye sizes are prepared, and an appropriate number of the nets are superposed to adjust the ultraviolet intensity. It is a thing. Reference numeral 20 denotes a lower end of the irradiation device main body 12, which is a reflection box in which both inner surfaces in the longitudinal direction of the ultraviolet curing light source 14 are irregular reflection surfaces, and the other two inner surfaces of the reflection box are mirror surfaces. Reference numeral 21 is a power supply device storage box.

Next, the conventional ultraviolet irradiation device shown in FIG. 4 and the uniformity of ultraviolet light in the work in the present invention will be described.

Fig. 5 shows the uniformity of ultraviolet rays in a conventional ultraviolet irradiation device. A 120-watt light source is housed inside the irradiation device main body with a length of 42 cm and a width of 12.5 cm. The distance from the lower end of the to the work is 40 cm, and the amount of ultraviolet light on the work surface is measured. According to the figure,
The difference between the places where the amount of ultraviolet rays is high and the places where the amount of ultraviolet rays is low is 75%.

On the other hand, according to the ultraviolet irradiation device according to the present invention, inside the irradiation device main body with a size of 48 cm in length and 19 cm in width,
A 120 watt light source is housed, the distance from the lower end of the reflection box to the work is 15 cm, the distance from the light source to the work is 40 cm, and the amount of ultraviolet light on the work surface is measured. The difference between many places and few places
90.7%, which is more uniform than the conventional one.

[Effect of device]

As described above, according to the present invention, the lower end of the irradiation treatment body is provided with the reflection box having the inner surfaces on both sides in the longitudinal direction of the light source as diffuse reflection surfaces. The UV intensity of the surface can be averaged.

Also, since the irradiation device body is configured to be movable up and down, and the intensity adjusting body is provided below the light source, it is possible to easily adjust the ultraviolet intensity on the work surface and match it with the type of work. Thus, it has an advantage that it can be irradiated with an appropriate amount of ultraviolet rays and that UV inks such as stickers and labels can be uniformly cured with an appropriate amount of ultraviolet rays.

[Brief description of drawings]

FIG. 1 is a sectional view of an irradiation device according to the present invention, and FIG.
Fig. 3 is a perspective view, Fig. 3 is a plan view showing the amount of ultraviolet rays of the work in the irradiation device of Fig. 1, Fig. 4 is a sectional view of a conventional irradiation device, and Fig. 5 is a view of the work in the irradiation device of Fig. 4. It is a top view which shows the amount of ultraviolet rays. 11 …… External body 12 …… Irradiation device main body 13 …… Main reflector 14 …… UV curing light source 16 …… Heat ray cut filter 19 …… Strength adjuster 20 …… Reflector box

Claims (1)

[Scope of utility model registration request] 1. A box-shaped outer body having a work placement part, which supports an irradiation device main body so as to be vertically movable, and a reflector formed by mounting an ultraviolet curing light source inside the irradiation device main body. Supporting, and at the lower end of the irradiation device main body, a reflection box whose inner surface on both sides in the longitudinal direction of the light source is a diffuse reflection surface is provided, and further located below the light source of the irradiation device main body, a heat ray cut filter and intensity adjustment An ultraviolet irradiating device characterized in that it is provided with a body.