JPS6333917B2 - - 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 an ultraviolet curing 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 circumference of the material to be coated, which is a wire or rod, it is necessary to
It is necessary to evenly irradiate the paint with ultraviolet light for drying and curing.

[Problem that the invention seeks to solve]

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.

When rotating the material to be coated, the structure of the device for conveying the material becomes complicated, the equipment must be large and expensive, and multiple ultraviolet light sources are installed around the material to be coated. When installing,
There have been complaints that not only a large number of expensive ultraviolet light sources are required, but also that the power consumption is 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 the Problems] Hereinafter, a coating drying apparatus for wire rods and rods according to the present invention will be described with reference to drawings showing embodiments of the present invention.

The coating drying device for wire rods and rods according to the present invention has a first reflecting mirror in the shape of an elliptical cylinder whose inner surface is mirror-finished.
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.

Further, an ultraviolet light source 9 was arranged on two axes of the first focal point of a reflecting mirror having an elliptical cylinder shape with a mirror surface on the inner surface, and UV paint was similarly applied on three axes of the second focal point of the reflecting mirror 1. Linear or rod-shaped material to be coated H
A passage through which the material to be coated H passes is formed by a hollow tube made of an ultraviolet-transparent material and filled with nitrogen gas.

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 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 and its axis is positioned on the second focal point three axes, and the object is moved from one end of the reflector 1 to the other end. It is allowed to pass towards the side.

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,
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. 4, 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, UV on the outer surface
The material H to be coated with paint is moved to this second focal point 3.
When placed on the axis, the UV paint applied to the outer surface of the material H to be coated will be reliably irradiated with the ultraviolet light from the ultraviolet light source 9.
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 to be coated 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. The amount of UV 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 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.

In addition, if the passage for the material H to be coated is formed by the hollow tube 10, the paint that is cured by ultraviolet irradiation will be located in a nitrogen gas atmosphere, so if an anaerobic UV paint is used, This means that dry curing of this anaerobic UV paint can be achieved successfully.

〔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.

A cooling duct 5 fixed to the top plate of the enclosure 4 is open at the upper end of the upper reflector 1a, and a cooling duct 5 that is blown in from a blower 7 provided on the top plate of the enclosure 4 is opened at the upper end of the upper reflector 1a. Air is blown onto the high-pressure mercury lamp serving as the ultraviolet light source 9, thereby cooling the high-pressure mercury lamp.

An exhaust fan 8 is also provided on the top plate of the casing 4 on which the blower 7 is provided, so as to exhaust the cooling air sent into the casing 4 from within the casing 4. ing.

That is, the cooling air sent into the enclosure 4 from the blower 7 is blown onto the ultraviolet light source 9 through the cooling duct 5, cools the ultraviolet light source 9, and then blows the ultraviolet light source 9 into the upper reflector 1a and the lower reflector. It flows out of the reflecting mirror 1 through the gap formed between the reflecting mirror 1b and both end faces of the reflecting mirror 1, and is directly discharged to the outside of the casing 4 by the exhaust fan 8.

The illustrated embodiment in FIGS. 1 and 2 shows the material to be coated H
This figure shows a configuration for use when an anaerobic UV paint is applied to the surface of the lens, and a hollow tube 10 made of an ultraviolet transmitting material such as a transparent quartz tube is installed with its central axis aligned with the three axes of the second focal point. The housing 4 is held by the holder 11.
It is fixed at

A conduit 13 is provided in the middle of the hollow tube 10 made of an ultraviolet transmitting material, and is always filled with a gas not containing oxygen gas such as nitrogen gas supplied through the conduit 13.

Both ends of this hollow tube 10 made of an ultraviolet-transparent material are provided so as to penetrate through the wall of the casing 4, and one end (the left end in FIG. 2) of the hollow tube 10 made of an ultraviolet-transparent material is coated with a material H coated with UV paint. An inlet pipe 12 is provided for introduction into the manufactured hollow tube 10.

Furthermore, when using a general UV paint other than an anaerobic UV paint, as shown in FIG. All you have to do is move it along the axis.

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 light guides with UV paint.

A hollow tube 10 is used to pass the divided passage for the material H to be coated.
In this case, in order to facilitate the insertion of the material H into the hollow tube 10, the hollow tube 10 is vertically divided into two parts along its axis, and the material H to be coated is set in half. Sometimes, it is convenient to construct the hollow tube 10 so that the material to be coated H can be inserted and assembled into the hollow tube 10 in a state in which it is separated into two parts.

〔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 it also 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 the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the apparatus of the present invention. FIG. 2 is a longitudinal sectional side view of the embodiment shown in FIG. FIG. 3 is a longitudinal sectional front view showing another embodiment of the device of the present invention. FIG. 4 is an explanatory diagram for explaining the operating principle of the device of the present invention. Explanation of symbols: 1; Reflector; 2; First focal point;
3: second focal point, 9: ultraviolet light source, 10: hollow tube made of ultraviolet-transparent material, 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 mirror-surfaced inner surface,
A coating drying device for rods and rods, in which a coated material H such as a wire 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. 2. An ultraviolet light source 9 is placed on the two axes of the first focal point of the reflecting mirror 1, which is shaped like an elliptical cylinder with a mirrored inner surface.
A material H to be coated, such as a wire or rod coated with an ultraviolet curable paint, is placed on the three axes of the second focal point of the reflecting mirror 1, and the passage for the material H to be coated is filled with nitrogen gas. A coating drying device for wire rods and rods made of hollow tubes made of ultraviolet-transparent material.