JPH02111475A - Coating and drying device for wire rod and bar - Google Patents

Abstract

PURPOSE:To obtain the drying device for UV cure coating which is reduced in size and improved in efficiency by adopting the constitution consisting in disposing an ultraviolet light source on the 1st focal axis of a reflecting mirror having an elliptical cylindrical shape and positioning a material to be coated on the 2nd focal axis. CONSTITUTION:The specular surface of the reflecting mirror 1 is formed on the inner peripheral surface of the mirror and has the elliptical cylindrical shape and, therefore, the ultraviolet rays projected from an ultraviolet light source 9 disposed on the 1st focal 2 axis of this specular surface is condensed to the 2nd focus 3 as shown in the figure. The outer peripheral surface of the material H to be coated is, therefore, condensed and irradiated with the ultraviolet rays projected from the UV light source 9 over entire area thereof if the material H is positioned on this 2nd focal 3 axis. The UV cure coating is thus powerfully dried and cured.

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 a general ultraviolet curing paint that is not an anaerobic UV paint applied to a material to be coated.

(Prior Art) 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 the material to be coated, which is a wire or rod, the UV paint applied to the entire outer circumferential surface of the material to be coated must be must be irradiated evenly.

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

[Problem that the invention seeks to solve]

When the material to be coated is rotated in the conventional means for ridge-coating, 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 unwound from a drum, etc. The configuration of the equipment used to do this is complicated, and the equipment must also be large and expensive.In addition, when multiple UV light sources are installed around the material to be coated, a large number of expensive UV light sources are required. In addition, there were complaints that the power consumption was enormous and that efficient paint drying could not be achieved.

The present invention was devised to solve the problems and dissatisfaction in the conventional examples described above, and uses a single ultraviolet light source to continuously and reliably apply UV light to the coated material without rotating it. 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 apparatus for coating and drying wire rods and bars according to the present invention has an ultraviolet light source 9 disposed on the two axes of the first focal point of a reflecting mirror having an elliptical cylinder shape with a mirror-surfaced inner surface, and similarly It is configured so that a linear or rod-shaped coated material H coated with UV paint is placed on three focal axes.

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 which 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.
．． 3 is naturally formed in a straight line.

The ultraviolet light source 9 arranged on the two axes of the first focal point is a straight line light source, and its axis is fixed to the two axes of the first focal point, and it is not mounted immovably to the reflecting mirror 1. Fixed.

The material to be coated H, whose outer surface has been coated with UV paint, is held in a straight line and its axis is positioned on the third axis of the second focal point, and is moved from one end of the reflecting mirror 1 to the other end. Passed towards the side.

In addition, in the above description, the ultraviolet light source 9 has its axis aligned with the first
Similarly, the axis of the material to be coated H is located on the third axis of the second focal point. The relationship 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 as described above.
It may also be slightly off the axis of the second focal point 2.3.

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. Also, the first and second focal points of the material H to be coated are allowed to shift by 2 degrees from the three axes.

[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 H is exposed to the ultraviolet light source 9 located on the two axes of the first focal point. The irradiated ultraviolet rays are concentrated and irradiated from all directions. Therefore, if the material to be coated H whose outer surface is coated with UV paint is arranged and positioned on the 3 axes of this second focal point, the UV paint coated on the outer surface of the material to be coated H will definitely be affected by the ultraviolet rays. The ultraviolet rays from the light source 9 will be irradiated, thereby causing the UV
Reliable drying and curing of the paint is achieved.

Furthermore, since the drying and curing of the UV paint applied to the surface of the material to be coated 8 is achieved by the concentrated ultraviolet rays irradiated from the ultraviolet light source 9, it is a matter of course that the UV paint is not irradiated. The amount of ultraviolet rays emitted is large, which results in 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 coating material H or to install multiple ultraviolet light sources around the material to be coated. Since it is only necessary to move the device in a straight line, the overall structure of the device is simple, and its handling and operation are also simple.

(Embodiment) In the illustrated embodiment, the reflecting mirror 1 is arranged and fixed inside the national polity 4 with its elliptical cross-sectional shape erected in the long sleeve direction, and with both focal points 2° and 3 axes horizontal. Further, this reflecting mirror 1 is divided into two equal parts vertically along the short axis of its elliptical cross-sectional shape, into an upper reflecting mirror 1a and a lower reflecting mirror 1b, with a gap formed between both reflecting mirrors 1a+1b. It is fixedly held within Kokutai 4.

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.

A cooling duct 5 fixed to the top plate of the national polity 4 is opened at the upper end of the upper reflector 1a, and the cooling air sent from the blower installed on the top plate of the national polity 4 is exposed to ultraviolet rays. The air is sprayed onto a high-pressure mercury lamp serving as a light source 9, thereby cooling the high-pressure mercury lamp.

An exhaust fan is also provided on the top plate of the National Athletic Meet 4 on which the blower is installed, so that the cooling air sent into the National Athletic Meet 4 can be exhausted from the National Athletic Meet 4.

That is, the cooling air sent into the national body 4 from the blower passes through the cooling duct 5 and is blown to the ultraviolet light source 9 to cool the ultraviolet light #9, and then to the upper reflector 1a and the lower reflector 1b. It flows out of the reflection SAl through the gap formed between the mirror 1 and both end faces of the reflection mirror 1, and is discharged as it is to the outside of the body 4 by the exhaust fan.

In the ridge configuration, the ultraviolet light source 9 and the material to be coated 3 face 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 for 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.

In addition, 6 in the figure is a power supply terminal for the ultraviolet light source 9 provided on the top plate of the national polity 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 light guides with UVI materials.

〔Effect of the invention〕

As is clear from the above description, the present invention can substantially uniformly irradiate the entire circumference of the material to be coated with ultraviolet rays from a single ultraviolet generating source, thereby greatly reducing the number of expensive ultraviolet generating sources used. As a result, the entire device can be manufactured at a low cost, and because it requires less accessory equipment such as cooling, it can be made smaller and easier to handle, and the generated ultraviolet rays can be efficiently coated. Since the material can be irradiated with UV rays, it is possible to obtain an efficient drying and curing operation 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 device of the present invention. Explanation of the symbols 1...Reflecting mirror, 2...First focal point, 3...Second location, 9...Ultraviolet light source, H...Material to be coated.

Claims (1)

[Claims] An ultraviolet light source (9) is disposed on the axis of a first focal point (2) of a reflecting mirror (1) in the shape of an elliptical cylinder with a mirrored inner surface, and a second focal point (3) of the reflecting mirror (1) is arranged. A coating drying device for wire rods and rods, in which a coated material (H) such as a wire rod or rod coated with an ultraviolet curable paint is passed through the shaft.