JPH0349625B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a coating drying device for ultraviolet curable coatings (hereinafter simply referred to as UV paints) applied to coated materials such as wire rods and rods. More specifically, the present invention relates to an apparatus for continuously drying general ultraviolet curing paint, which is not an anaerobic UV paint, applied to a material to be coated.

[Conventional technology]

Colored UV paints with high coating strength and surface hardness are often used to color insulated wires.
In order to cure and dry the UV paint applied to the entire outer circumferential surface of this wire or rod material,
It is necessary to uniformly irradiate the entire outer circumferential surface of the coated material with ultraviolet rays for drying and curing of the UV paint applied.

In this way, in order to uniformly irradiate the UV paint applied to the outer circumferential surface of a linear or rod-shaped material to be coated, it is necessary to rotate the material to be coated around its axis or to It is necessary to install a plurality of ultraviolet light sources around the coating material so as not to cast shadows on the surface of the material to be coated.

[Problem that the invention seeks to solve]

In the conventional means described above, when the material to be coated is rotated, the material to be coated is transported in order to deal with the twisting caused by the rotation, which is applied to the long wire rod etc. that is rewound from the drum etc. The configuration of the equipment used to do this is complicated, and the equipment must also be large and expensive, and if multiple UV light sources are installed around the material to be coated, a large number of expensive UV light sources are required. Not only that, but there were complaints that the power consumption was enormous, making it impossible to achieve efficient paint drying.

The present invention was devised to solve the problems and dissatisfaction with the conventional examples described above, and uses a single ultraviolet light source to continuously and reliably apply UV light without rotating the material to be coated. The purpose is to achieve dry hardening of paint coatings.

[Means for solving problems]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A coating drying apparatus for wire rods and rods according to the present invention will be described below with reference to drawings showing embodiments of the present invention.

The coating drying device for wire rods and bars according to the present invention has a first reflecting mirror in the shape of an elliptical cylinder with a mirror surface.
An ultraviolet light source 9 is disposed on the two focal axes of the reflecting mirror 1, and a linear or rod-shaped material H coated with UV paint is similarly positioned on the three axes of the second focal point of the reflecting mirror 1. There is.

The inner peripheral surface of the reflecting mirror 1 has the same shape as the inner peripheral surface of a linear elliptical cylinder, and forms an extremely smooth mirror surface.

Therefore, the mirror surface that is the inner peripheral surface of this reflecting mirror 1 has a first focal point 2 and a second focal point 3, and both focal points 2 and 3 are naturally formed in a straight line. It turns out.

Ultraviolet light source 9 arranged on two axes at the first focal point
is a linear light source, and is immovably assembled and fixed to the reflecting mirror 1 with its axis aligned with the two axes of the first focal point.

The material to be coated H, whose outer surface has been coated with UV paint, is held in a straight line with its axis positioned at the second focal point 3 axes, and is moved from one end of the reflector 1 to the other end. be passed towards.

In the above description, the ultraviolet light source 9 has its axis located on two axes of the first focal point, and similarly, the material to be coated h has its axis located on three axes of the second focal point. However, the positional relationship of the ultraviolet light source 9 and the material to be coated H with respect to the reflecting mirror 1 is not necessarily strict, and the positional relationship of the ultraviolet light source 9 and the material to be coated H with respect to the reflecting mirror 1 is the same as the above-mentioned first and third embodiments. There is no problem even if the focal point of 2 is slightly off the axis of 2 and 3.

That is, since it is sufficient that the ultraviolet rays emitted from the ultraviolet light source 9 are irradiated directly or reflected by the reflecting mirror 1 to the entire outer surface of the material to be coated H, the ultraviolet light source 9 may be used within a range that satisfies this condition. and first and second focal points 2 of the material H to be coated,
Only deviations from the three axes are allowed.

[Effect]

As mentioned above, the reflecting mirror 1 has an elliptical cylindrical mirror surface, which is its inner peripheral surface, so that it is irradiated in all directions by the ultraviolet light source 9 placed on the two axes of the first focal point of the mirror surface. As shown in FIG. 2, the ultraviolet rays are focused on the second focal point 3 from all directions.

Therefore, when the material to be coated H is positioned on the three axes of the second focal point, the entire outer peripheral surface of the material to be coated H is irradiated by the ultraviolet light source 9 located above the first focal point 2. The resulting ultraviolet rays are concentrated and irradiated from all directions. Therefore, it is necessary to position the material to be coated H whose outer surface is coated with UV paint on the three axes of this second focal point, and to ensure that the UV paint applied to the outer surface of the material to be coated H is provided with an ultraviolet light source. 9 will be irradiated with ultraviolet rays, and this will cause
Reliable drying and curing of UV paint is achieved.

Furthermore, since the drying and curing of the UV paint applied to the surface of the material H is achieved by the concentrated ultraviolet rays irradiated from the ultraviolet light source 9, it is natural that the UV paint is not irradiated with the UV paint. The amount of ultraviolet rays emitted is large, and this results in a strong drying and curing of UV paint.

Furthermore, since the material to be coated H is irradiated with ultraviolet rays from all directions simply by being located on the second focus three axes of the reflecting mirror 1, it is necessary to irradiate the entire outer peripheral surface of the material H with ultraviolet rays. There is no need to rotate the material H to be coated or install multiple ultraviolet light sources around the material H to be coated, and simply provide one ultraviolet light source 9 and move the material H to be coated linearly along its axis. Since it is only necessary to do this, the structure of the entire device is simple, and its handling and operation are also simple.

〔Example〕

In the illustrated embodiment, the reflecting mirror 1 is erected in the long axis direction of its elliptical cross-sectional shape, and has both focal points 2,
The reflector 1 is arranged and fixed in the case 4 with its three axes horizontal, and furthermore, the reflector 1 has an upper reflector 1a arranged vertically along the short axis of its elliptical cross-sectional shape.
and a lower reflecting mirror 1b, and are fixedly held in the casing 4 with a gap formed between both reflecting mirrors 1a and 1b.

A high-pressure mercury lamp as an ultraviolet light source 9 is arranged and fixed on the two axes of the first focal point of the upper reflecting mirror 1a with its central axis aligned with the two axes of the first focal point.The upper end of the upper reflecting mirror 1a A cooling duct 5 fixed to the top plate of the enclosure 4 is open at the top of the enclosure 4, and the cooling air sent from the blower installed on the top plate of the enclosure 4 is used as an ultraviolet light source 9. It is sprayed onto high-pressure mercury lamps to cool them down.

On the top plate of the enclosure 4 where this blower is installed,
An exhaust fan is also provided to achieve cooling air sent into the housing 4 and exhaust from the housing 4.

That is, the cooling air sent into the enclosure 4 from the blower passes through the cooling duct 5 and is blown onto the ultraviolet light source 9 to cool the ultraviolet light source 9, and then the upper reflector 1a and the lower reflector 1b. It flows out of the reflecting mirror 1 through the gap formed between the reflecting mirror 1 and both end faces of the reflecting mirror 1, and is directly discharged to the outside of the casing 4 by the exhaust fan.

In the above configuration, the ultraviolet light source 9 and the material to be coated 3 are located opposite each other in the same space, but since cooling air is normally supplied to this space as described above, in the case of anaerobic UV paint, Since the polymerization reaction is hindered by oxygen, it is recommended to use it with general UV paints that are not anaerobic UV paints.

The material to be coated H only needs to be moved along the three axes of the second focal point.

Note that 6 in the figure is a power supply terminal for the ultraviolet light source 9 provided on the top plate of the casing 4.

Colored electric wires can be considered as the coated material H treated by the apparatus of the present invention, but drying and curing of UV paint can also be achieved on linear or rod-shaped materials other than electric wires, and it is possible to dry and harden UV paints on materials other than electric wires, such as mere coating films. It can be used not only for molding, but also for drying macro printing, and even for molding glass fibers for slide glasses with UV paint.

〔Effect of the invention〕

As is clear from the above description, the present invention can irradiate the coated material almost uniformly with ultraviolet rays from a single ultraviolet generating source, thereby reducing the number of expensive ultraviolet generating sources used. This makes it possible to manufacture the entire device at a low cost, and requires less accessory equipment such as cooling, making it more compact and easier to handle. Since it can efficiently irradiate the material to be coated, it exhibits many excellent effects such as efficient drying and curing of UV paint.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the apparatus of the present invention. FIG. 2 is an explanatory diagram for explaining the operating principle of the apparatus of the present invention. Explanation of symbols 1...Reflector, 2...First focal point,
3... Second focal point, 9... Ultraviolet light source, H... Material to be coated.

Claims (1)

[Claims] 1. An ultraviolet light source 9 is arranged on the two axes of the first focal point of a reflecting mirror 1 having an ellipsoidal cylinder shape with a mirrored inner surface,
A coating drying device for wire rods, rods, etc., in which a coated material H, such as a wire rod or rod, coated with an ultraviolet curable paint is passed through and positioned on the second focal point 3 axes of the reflecting mirror 1.