JPH07195018A - Method for uniformly irradiating shell of two-piece can with ultraviolet ray and device therefor - Google Patents

Abstract

PURPOSE:To uniformly and inexpensively irradiate the two-piece can with UV at high speed by irradiating one side and then the other side of the can with parallel UV with plural lamp houses and varying the angle of the parallel UV to the traveling direction of the can clockwise. CONSTITUTION:The two-piece can is moved orthogonally to the center axis line of the can shell. One side and then the other side of the can are irradiated with parallel UV with plural lamp houses. In this case, the angle of the parallel UV to the traveling direction of the can is varied clockwise so that the can shell is uniformly irradiated with the parallel UV. For example, then can 25 is moved to the irradiation position, and the curved surfaces EF, CD and AB different from one another on the shell of the can 25 are respectively irradiated with lamps 22a to 22c. At this time, the parallel UVs from the lamps 22a to 22c are projected at the different angles alpha and beta to the traveling direction of the can 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to coating and printing of two-piece cans, and more particularly to a device for irradiating a can body with ultraviolet rays.

[0002]

2. Description of the Related Art Ultraviolet (UV) curable ink has been widely used in printing, for example, in a printed wiring board manufacturing process, and is selectively used in combination with a thermosetting ink depending on the application.

In the printing and painting of two-piece cans, UV curable inks and coating agents that do not require a heating oven have been developed for the purpose of eliminating environmental pollution, saving energy, improving the working environment, and reducing manufacturing costs. There is. Therefore, various ultraviolet irradiation devices that replace the thermal oven have been developed.

Conventionally, there is JP-B-53-25843 as a prior art of an ultraviolet irradiation device. This invention is an apparatus for irradiating ultraviolet rays by rotating a can. Since the can is rotated, the processing capacity of the can irradiated with ultraviolet rays is small. Therefore 150 per minute
It is not suitable as an irradiation device for a two-piece can line that is printed and painted at a speed of 0 to 2000 cans.

As a prior art, Japanese Patent Publication No. 4-1502.
There is 8. In the present invention, as shown in FIG. 10, the can body is moved in a direction orthogonal to the central axis BB of the can body without rotating the can body. The UV irradiation device of the can body is installed on both sides of the moving direction of the can body. The elongated lamp of the lamp house has its central axis AA taken along the central axis BB of the can body.
Are arranged in an orthogonal direction with respect to. This positional relationship will be described with reference to FIG. FIG. 10 shows a can 65 and a lamp 6.
It is a perspective view which shows the positional relationship of 2. The can 65 moves on the vacuum belt conveyor 61 from left to right in the figure. The central axis AA of the elongated lamp 62 is parallel to the moving direction of the can body of the can 65 (shown by an arrow).

In the case of UV irradiation as shown in FIG. 10, since the central axes of the elongated lamps 34 and 36 of the lamp house are parallel to the moving direction of the can body, the round can such as a two-piece can is uniformly irradiated with the UV. It is difficult to do so, and uneven irradiation of the ultraviolet curable ink may occur. That is, if the object to be irradiated is a flat surface such as a printed wiring board, ultraviolet rays can be uniformly irradiated. However, since the side surface of the can body is circular, improvement is required in terms of uniform irradiation of ultraviolet rays.

Therefore, attempts have been made to change the relative position of the lamp with respect to the object to be irradiated. For example, the actual exploitation 58
-166836 also shows an example in which the central axis of the lamp is orthogonal to the axis of the can body. Furthermore, actual Kaihei 3-8
No. 6081 discloses that a rectangular parallelepiped object is irradiated with ultraviolet rays obliquely. In addition, the actual Kaisho 61-1
18634 discloses that a cylindrical object to be irradiated moves in the axial direction and the lamp axis is arranged parallel to the axis. Furthermore, JP-A-4-176362
Discloses that the axis of the elongated object to be irradiated and the axis of the lamp are obliquely arranged.

[0008]

The conventional ultraviolet irradiating device has a problem as described above in that it irradiates a circular can body such as a two-piece can with ultraviolet light uniformly.

An object of the present invention is to improve an irradiation device for a two-piece can line which is printed and painted at a high speed, and which uniformly irradiates the can body of the two-piece can with ultraviolet rays. To do.

[0010]

In order to achieve the above object, the method of irradiating ultraviolet rays of a two-piece can of the present invention moves the two-piece can in a direction orthogonal to the central axis of the can body. The can barrel is irradiated with parallel ultraviolet rays from one side of the two-piece can by two or more lamp houses, and then the can barrel is irradiated with parallel ultraviolet rays from two or more lamp houses from the other side. By making parallel ultraviolet rays emitted from two or more lamp houses different from the moving direction of the two-piece can in the clockwise direction, the can barrel of the two-piece can can be uniformly irradiated with the ultraviolet rays. In the present invention, "parallel ultraviolet rays" means that ultraviolet rays are irradiated in parallel,
The reason for making the ultraviolet rays parallel is to uniformly irradiate the surface to be irradiated.

An apparatus for irradiating a can body of a two-piece can of the present invention with ultraviolet rays includes a device for moving the two-piece can in a direction orthogonal to a central axis of the can body, and one side of the two-piece can. A first ultraviolet irradiating device having two or more lamp houses for irradiating the can barrel with parallel ultraviolet rays from the first ultraviolet irradiating device in the moving direction of the two-piece can and from the other side of the two-piece can And a second ultraviolet irradiation device having two or more lamp houses for irradiating a can body with parallel ultraviolet rays. The installation direction of the lamp house is determined so that the angle formed by the parallel ultraviolet rays emitted from the lamp house with the moving direction of the two-piece can is different for each lamp house in the clockwise direction.

The apparatus for irradiating the can body of a two-piece can with ultraviolet rays may be provided with a plurality of sets of ultraviolet ray irradiation apparatuses, with the first ultraviolet ray irradiation apparatus and the second ultraviolet ray irradiation apparatus as one set.

The apparatus for irradiating the can body of a two-piece can with ultraviolet light is the first ultraviolet light irradiation device and the second ultraviolet light irradiation device each having three lamp houses.
In the ultraviolet irradiating device, the parallel ultraviolet rays from the first lamp house make an angle of 30 to 60 clockwise with respect to the moving direction of the two-piece can.
, 90 degrees for the second lamp house, and 150 to 120 degrees for the third lamp house. In the second ultraviolet irradiation device, the distance from the first lamp house relative to the moving direction of the two-piece can. The parallel ultraviolet rays make an angle of 210 to 240 degrees clockwise with the moving direction of the two-piece can, 270 degrees in the second lamp house, and 330 in the third lamp house.
It is preferably ˜300 degrees.

The apparatus for irradiating the can body of a two-piece can with ultraviolet light is the first ultraviolet light irradiation device and the second ultraviolet light irradiation device each having two lamp houses.
In the ultraviolet irradiating device, the angle formed by the parallel ultraviolet rays from the first lamp house and the moving direction of the two-piece can with respect to the moving direction of the two-piece can is 40 to 65 clockwise.
In the second lamp house, it is 140-115 degrees,
In the second ultraviolet irradiation device, the parallel ultraviolet rays from the first lamp house 2
The angle with the moving direction of the piece can is 220 clockwise.
It is preferably 245 degrees and 220 to 295 degrees in the second lamp house.

The apparatus for irradiating the can body of a two-piece can with ultraviolet light is a straight line or an arbitrary arc extending through each lamp house of two or more lamp houses of the first ultraviolet irradiation device and the second ultraviolet irradiation device. It can also be characterized by being arranged above.

The apparatus for irradiating the can barrel of a two-piece can with ultraviolet light is such that each lamp house of three or more lamp houses of the first ultraviolet irradiation device and the second ultraviolet irradiation device has an arbitrary arc or triangle. When the lamp house is arranged at the apex, the lamp house may be concave or convex with respect to the irradiated can.

The apparatus for irradiating the can body of a two-piece can with ultraviolet rays is provided with auxiliary reflection mirrors on the opposite sides of the first and second ultraviolet irradiating devices with respect to the can to be irradiated. To do. The auxiliary reflection mirror is a surface parallel to the moving direction of the two-piece can, is a position facing each ultraviolet irradiation device, and is installed in a range where the parallel ultraviolet light irradiated by each ultraviolet irradiation device reaches. The auxiliary reflection mirror may be a smooth reflection plate, but in order to utilize the ultraviolet rays more effectively, a reflection plate having an at random waveform is preferable.

[0018]

The present invention is characterized in that the can body of a two-piece can is uniformly irradiated with ultraviolet rays. Therefore, the operation of uniformly irradiating the can body of the two-piece can with ultraviolet rays will be described with reference to FIGS. 11 and 1.

In FIG. 11, the lamp 72 emits ultraviolet rays,
FIG. 6 is a diagram showing a distribution of the amount of reaching light when the ultraviolet rays are reflected by a reflecting plate 73 and are parallel ultraviolet rays, that is, parallel to each other as shown by an arrow and reaching a flat plate 74 which is an irradiation target.
Point O is a point where the ultraviolet rays from the lamp 72 are directly orthogonal to the irradiation target. The Y-axis shows the distribution of the amount of ultraviolet light reaching, and the X-axis shows the distance from the point O of the irradiated body. A metal halide lamp or a high pressure mercury lamp can be used as the lamp.

When parallel ultraviolet rays are irradiated by the elongated lamp 72 according to the present invention, the range in which the reaching light amount is stable (the value of AY in the distribution chart) is that the height is the lamp height and the width is the reflection plate 73. It is the area of the irradiated body corresponding to the width CD. If the can body of the two-piece can is moved to the range where the amount of reaching light is stable, parallel ultraviolet rays can be effectively irradiated. Therefore,
If the object to be irradiated is a flat surface like a printed wiring board, parallel ultraviolet rays may be irradiated in the Y direction while moving the object to be irradiated in the X direction. Further, the lamp house including the lamp 72 and the reflector 73 may be arranged side by side in the X direction. However, in the case of a curved surface such as a can body of a two-piece can, the incident angle of parallel ultraviolet rays on the curved surface varies depending on the location, so that the can body cannot be uniformly irradiated.

Therefore, in one aspect of the present invention, the lamps are arranged as shown in FIG. That is, FIG. 1 shows that the parallel ultraviolet rays emitted from the three lamps 22a, 22b, 22c are two.
It is a figure showing the mode of reaching the can body of piece can 25.
The two-piece can 25 moves as shown by the arrow and enters the irradiation position. The lamp 22a is a curved surface E of the can body of the can 85.
F is irradiated and the lamp 22b is the curved surface CD of the can body of the can 25.
The lamp 22c irradiates the curved surface AB of the can body of the can 25, respectively. Since the central point of the curved surface of the can body is the shortest distance from the lamp, the amount of light that reaches it is the maximum. Therefore, it is not possible to irradiate uniformly with one lamp, but if the parallel ultraviolet rays of the three lamps are irradiated at different angles with respect to the moving direction of the two-piece can as shown in the figure, then the half-curved surface of the can body of the two-piece can 25 is shown. Can be uniformly irradiated. In this case, the angle α shown in FIG.
When the angle is 60 degrees and the angle β is 150 to 120 degrees, the most uniform irradiation is possible. The parallel ultraviolet rays of the lamp 22b are
It is orthogonal to the moving direction of the two-piece can 25.

The two-piece can 25 moves only in the direction of the arrow and does not rotate. An embodiment of the moving device for the two-piece can 25 is shown in FIG. FIG. 2 is a view showing a state in which the two-piece can is attached to the pin chain. The two-piece can 25 is attached to the pin 29 of the pin chain 28 and moves. The elongated lamp 22 is installed parallel to the central axis of the two-piece can 25. The parallel ultraviolet rays emitted by the lamp 22 travel in a direction orthogonal to the moving direction of the two-piece can.

[0023]

[Embodiment 1] Embodiment 1 of the present invention
It will be described based on.

FIG. 3 is an elevational view showing a relationship between a set of ultraviolet irradiation devices of the present invention and an irradiation position on the surface of a can body corresponding to FIG. In addition, in contrast to the irradiation device shown in FIG.
Another set of ultraviolet irradiation devices is installed on the opposite side at a position deviated from the moving direction of the two-piece can.

Next, the coating of the UV-curable coating material, which is a pre-process of UV irradiation according to the embodiment of the present invention, will be described. The UV-curable coating material was applied to a 2-piece aluminum can using a 2-piece can coating coater. 2-piece aluminum can for 350 ml manufactured by Mitsubishi Materials (diameter 66 mm, height 1
24 mm) was used. The coating amount of UV curable paint is
It was set to 120 mg / can.

After applying the UV-curable coating material described above to a two-piece aluminum can, UV irradiation was carried out by the method according to the present invention.

The three lamp houses 21a, 21b and 21c are used to form one set of ultraviolet irradiation device. The lamp house 21 is S250-A6 manufactured by Nippon Battery Co., Ltd. and is an aluminum mirror parallel type. As the ultraviolet lamp 22, a metal halide A lamp (120 W / cm, 3 kW) made by Nippon Battery Co., Ltd.
L250NL was used.

Lamp house 21a and lamp house 21c
Allows the angle to be changed with respect to the moving direction of the two-piece can 25. The angle of the lamp house 21b was fixed so that the parallel ultraviolet rays of the lamp 22b formed an angle of 90 degrees with the moving direction of the two-piece can 25. The two-piece can 25 moves at a position 133 mm from the front end surface of the central lamp house 21b.

The two-piece can 25 has a diameter of 66 mm and a height of 12
It is 4 mm. An ultraviolet intensity meter was attached to the can body surface of the two-piece can 25 at points 1, 2, 3, 4, 5, 6, 7, and 8 shown in FIG. UV intensity meter is Electronic-Instrument &
UVLOAD UR365CHI manufactured by Technolozy was used.

The moving speed of the two-piece can 25 is 40 m / mi.
n, the angle α formed by the parallel ultraviolet rays of the lamp house 21c with respect to the moving direction of the two-piece can 25 is 30 degrees, 45 degrees.
60 degrees (In the lamp house 21a, the angle β is 150
, 135 degrees, 120 degrees). Also,
The ultraviolet irradiator on the opposite side also changed the angle of parallel ultraviolet rays. In this way, the integrated amount of ultraviolet light at the points 1, 2, 3, 4, 5, 6, 7, and 8 shown on the can body surface of the two-piece can 25 was measured. In the measurement results, when point 1 was set to 1, point 3 was 0.9. From this, it can be seen that the can body of the two-piece can 25 is uniformly irradiated with ultraviolet rays. That is, uniform irradiation was achieved in that uneven irradiation of the ultraviolet curable ink on the can body of the two-piece can did not occur.

Further, adhesion, pencil hardness, DuPont impact resistance, and retort resistance were measured at eight locations on the surface of the can body of the two-piece can 25. Hereinafter, this test method will be described.

Die-cure DI black ink was added to an aluminum 2-piece can (350 ml can) using an R tester with a mandrel.
Spread the color to 0 ± 5 mg / can. Then, the above ultraviolet-curable coating material is applied to a can of 120 mg / can using a spreader coater with a mandrel (manufactured by Hoei Seiki Co., Ltd.). After measuring the adhesion of this can, the coating can irradiated with the above-mentioned ultraviolet rays was put in a heat oven at 200 ° C. for 120 seconds, assuming an inside oven. After that, various physical properties were measured at eight locations at equal intervals along the peripheral surface at the center in the height direction of the two-piece can. The physical property evaluation items are as follows.

Adhesion: Cellotape peeling test Hardness: Pencil hardness test Impact resistance: DuPont impact resistance Retort resistance test: 130 ° C.-30 minutes Observation of changes in coating film after placing in retort kettle

The results are shown in Table 1. It can be seen that ultraviolet rays were uniformly irradiated as a whole.

[0035]

[Table 1]

The UV-curable paint applied to the can body had the following composition. The following composition was placed in a container and stirred continuously with a dispersion stirrer until it was sufficiently dispersed to obtain an ultraviolet curable coating composition having a viscosity of 86 seconds (Ford cup # 4, 25 ° C).

[Blending] Evecryl-810 (Polyester acrylate manufactured by Daicel UCB) 30.0 parts Evecryl-220 (Urethane acrylate manufactured by Daicel UCB) 20.0 parts TMPTA (Trimethylolpropene triacrylate) 10.0 parts TPGDA (tripropylene glycol diacrylate) 35.0 parts Ir-184 (photopolymerization initiator manufactured by Ciba-Gaiki) 5.0 parts L-7001 (silicone resin manufactured by Nippon Yunika Co., Ltd.) 0.5 part Polyethylene wax 1.0 part

[0038]

Second Embodiment A second embodiment of the present invention will be described.

Example 2 was tested by using the same ultraviolet irradiation device as in Example 1. However, the following points are different. A 160 W / cm high pressure mercury lamp was used as the lamp. A semi-condensing type was used for the reflecting mirror. Further, the pin chain was moved at a speed of 80 m / min and irradiated with ultraviolet rays.

As a result, as in Example 1, the ultraviolet irradiation was uniform and good.

[0041]

Third Embodiment FIG. 4 and FIG. 5 regarding a third embodiment of the present invention.
It will be described based on. FIG. 4 shows a second embodiment of the present invention.
1 is a schematic elevational view of a set of ultraviolet irradiation devices. FIG. 5 is a schematic side view showing a part of a pin chain or the like in a state of holding and carrying a two-piece can.

An apparatus according to an embodiment of the present invention will be described with reference to FIG. The lamp house 21a, the lamp house 21b, and the lamp house 21c form a set of ultraviolet irradiation devices, and the lamp house 21d, the lamp house 21
e and the lamp house 21f as another set of ultraviolet ray irradiation devices, which are arranged in a zigzag shape so as to face each other with respect to the XX axis which is the moving direction of the two-piece can 25. This arrangement is the same as in the first embodiment.

The movement of the two-piece can 25 will be described with reference to FIG. 2 pieces can 2 on pin 29 of pin chain 28
Attach 5. When the pin chain 28 moves from the top to the bottom, the two-piece can 25 moves from the top to the bottom on the XX axis.

Each of the ultraviolet irradiation devices has a cooling air supply port 2
7a and a cooling air supply port 27b are provided to cool each ultraviolet irradiation device. The air that has cooled each ultraviolet irradiation device is exhausted from the exhaust duct 20.

The same lamp house and lamp were used as in Example 1. That is, the arrangement of the lamp houses (21f, 21e, 21d) of the first ultraviolet irradiation device is
With respect to the moving direction of the two-piece can, the first lamp house forms an angle of 30 to clockwise with the moving direction of the two-piece can.
The second lamp house was installed so that it could be adjusted within a range of 60 degrees, the second lamp house within a range of 90 degrees, and the third lamp house within a range of 150 to 120 degrees. The second ultraviolet irradiation device (21a, 21b,
21c) corresponds to the first ultraviolet irradiation device,
It becomes 0 to 240 degrees, 270 degrees, and 330 to 300 degrees.

In this embodiment, the lamp house 21
The auxiliary reflection mirror 26a is arranged on the opposite side of the line of the two-piece can 25 so as to face the a, b, and c.
An auxiliary reflection mirror 26b is arranged on the opposite side of the line of the two-piece can 25 so as to face d, e, and f.

The two-piece aluminum can is moved in the direction orthogonal to the center axis of the can body without rotating it. The movement was performed by the pin chain 28. Three lamp houses 21a, 21b, and 21c from one side of the two-piece can
To irradiate the can barrel with parallel ultraviolet rays, and then irradiate the can barrel with parallel ultraviolet rays from the three lamp houses 21d, 21e, and 21f. At this time, the central axis of the elongated lamp of the lamp house is oriented parallel to the central axis of the can body (see FIG. 2). Lamp house 21f, lamp house 21d, lamp house 21a and lamp house 2
The angle formed by the parallel ultraviolet rays emitted from 1c with the moving direction of the two-piece can is 35 degrees, 145 degrees, and 21 degrees, respectively.
It was set to 5 degrees and 325 degrees (see FIG. 1). The moving speed of the pin chain was 160 m / min. In order to investigate whether or not the coating film of the two-piece aluminum can was uniformly irradiated with ultraviolet rays, the adhesion, pencil hardness, DuPont impact resistance, and retort resistance were measured at eight locations on the can body surface of the two-piece aluminum can. The results showed that the UV irradiation was uniform.

[0048]

[Fourth Embodiment] A fourth embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a schematic elevational view of four sets of ultraviolet irradiation devices according to an embodiment of the present invention. FIG. 7 is a schematic side view showing a part of a pin chain for holding and carrying a two-piece can.

An apparatus according to the embodiment of the present invention will be described with reference to FIG. The lamp house 32a, the lamp house 32b, and the lamp house 32c form a set of ultraviolet irradiation devices, and the lamp house 32d, the lamp house 32
e and the lamp house 32f are arranged in a zigzag pattern as another set of ultraviolet irradiation devices, facing each other with respect to the X-X axis which is the moving direction of the two-piece can 35. The arrangement of these lamp houses is the same as that of the third embodiment, but in the fourth embodiment, two sets of the same lamp house are continuously added in the same arrangement. The other points are the same as in the third embodiment.

FIG. 7 shows the moving state of the two-piece can 35.
The two-piece can 35 is attached to the pin 39 of the pin chain 38. When the pin chain 38 moves from top to bottom, the two-piece can 35 moves from the top to the bottom on the XX axis. The air that has cooled each ultraviolet irradiation device is exhausted from the exhaust duct 40. The air for cooling the lamp house is the cooling air supply port 37.
a, 37b.

The difference between the fourth embodiment and the third embodiment is that the number of lamp houses is doubled so that the moving speed of the two-piece can 35 is doubled to 320 m / min. Thus, the present invention is characterized in that the moving speed of the two-piece can 35 can be increased by adding the lamp house. As a result of Example 4, even if the moving speed of the two-piece can 35 is increased,
Can irradiate piece cans with ultraviolet light evenly

[0052]

Fifth Embodiment A fifth embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a schematic elevational view of two sets of ultraviolet irradiation devices according to an embodiment of the present invention. FIG. 9 is a schematic side view showing a part of a pin chain for holding and carrying a two-piece can.

An apparatus according to the embodiment of the present invention will be described with reference to FIG. The lamp house 52a and the lamp house 52b are used as one set of ultraviolet irradiation devices, and the lamp house 52c and the lamp house 52d are used as another set of ultraviolet irradiation devices, each of which is the moving direction of the two-piece can 55. Install in a staggered pattern, facing each other on both sides. The arrangement of these lamp houses is the same as that of the second embodiment, but in the fifth embodiment, the central lamp house of the three lamp houses of the third embodiment is removed and two lamp houses form one set. is there. Also, the lamp houses 52d, 5
The angles formed by the parallel ultraviolet rays emitted from 2c, 52a and the lamp house 52b with respect to the moving direction of the two-piece can are clockwise, 45 °, 135 °, 225 °, and 315 °, respectively. The other points are the same as those in the second embodiment.

FIG. 9 shows the moving state of the two-piece can 55.
The two-piece can 55 is attached to the pin 59 of the pin chain 58. The moving system for the two-piece can 55 is the same as that in the third embodiment. The moving speed of the two-piece can 55 was 50 m / min.

The two-piece can 55 was coated and printed by the same method as in Example 1, and then was irradiated with ultraviolet rays by the ultraviolet ray irradiation device shown in FIGS. 8 and 9. As a result, the two-piece can was uniformly irradiated with ultraviolet rays.

[0056]

Sixth Embodiment In the first embodiment, the lamp house 21a,
Although b and c are arranged at substantially equal intervals, in the present embodiment, the distance between the lamp houses 21b and 21c is made larger than the distance between the lamp houses 21a and 21b. Obtained.

In the present specification, "parallel", "orthogonal",
The term "uniform" is used not in a numerical sense but in a substantial sense so as to prevent uneven irradiation.

[0058]

Since the present invention is constructed as described above, it has the following effects. (1) A two-piece can coated with a UV-curable paint and printed can be uniformly irradiated with UV light. (2) A two-piece can can be uniformly irradiated with ultraviolet light at a higher speed than before. (3) If the distance between the lamp house of one set of UV irradiation equipment and the can body surface of a two-piece can is the same, each lamp can use the same intensity lamp, and maintenance management of each lamp is economical. And convenient.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a mode in which parallel ultraviolet rays irradiated by a lamp reach a can body of a two-piece can.

FIG. 2 is a side view showing a state in which a two-piece can is attached to a pin chain.

FIG. 3 is an explanatory diagram showing a relationship between a set of irradiation devices according to an embodiment of the present invention and irradiation positions on the surface of a can body.

FIG. 4 is a schematic elevational view of two sets of ultraviolet irradiation devices according to an embodiment of the present invention (in the case where two lamp houses form one set of ultraviolet irradiation devices).

5 is a schematic side view corresponding to FIG. 4, showing a part of a pin chain or the like for holding and carrying a two-piece can.

FIG. 6 is a schematic elevational view of four sets of ultraviolet irradiation devices according to another embodiment of the present invention.

FIG. 7 is a schematic side view corresponding to FIG. 6 showing a part of a pin chain or the like for holding and carrying a two-piece can.

FIG. 8 is a schematic elevational view of two sets of ultraviolet irradiation devices according to another embodiment of the present invention (when two lamp houses form one set of ultraviolet irradiation devices).

FIG. 9 is a schematic side view corresponding to FIG. 8 showing a part of a pin chain or the like for holding and carrying a two-piece can.

FIG. 10 is a perspective view showing a positional relationship between a two-piece can and a lamp of a conventional device.

FIG. 11 is a diagram showing a reaching light amount distribution when parallel ultraviolet rays irradiated by a lamp reach a flat plate which is an irradiation target.

[Explanation of symbols]

1 pair of irradiation devices 21a, 21b, 21c, 32a, 32b, 32c, 3
2d, 32e, 32f, 52a, 52b, 52c, 52
d lamp house 22, 33, 53, 62, 72 lamp 23, 34, 54, 63, 73 reflector (mirror) 25, 35, 55, 65, 85, 95 two-piece can 26a, 26b, 36a, 36b, 36c , 56a, 5
6b Auxiliary reflector (mirror) 27a, 27b, 37a, 37b, 57a, 57b Cooling air supply port 28, 38, 58 Pin chain 29, 39, 59 Pin chain pin 20, 40, 60 Cooling air discharge port 61 Vacuum belt conveyor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Saori Sugimoto 22-26 Hikawa-cho, Itabashi-ku, Tokyo Kiyu Dormitory (72) Inventor Yoshitsugu Nakajima 4-3-3 Aoyama, Otsu City, Shiga Prefecture (72) Inventor Ezaki Shingo 2-27 Izumi, Momoyama-cho, Fushimi-ku, Kyoto-shi, Kyoto (72) Inventor Kozo Matsuo 11 of 73, Teragakiuchi, Joyo-shi, Kyoto Prefecture

Claims (8)

[Claims] 1. A two-piece can is moved in a direction orthogonal to the central axis of the can body, and parallel ultraviolet rays are applied to the can body from one side of the two-piece can by two or more lamp houses, and then the other side. The parallel ultraviolet rays emitted from the lamp house are aligned with the moving direction of the two-piece can so that parallel ultraviolet rays are radiated to the can body from two or more lamp houses from the side of the A method of irradiating ultraviolet rays on a two-piece can, which consists of making the angle to be different clockwise. 2. A device for moving a two-piece can in a direction orthogonal to a central axis of the can body, and two or more lamp houses for irradiating a can body with parallel ultraviolet rays from one side of the two-piece can. A first ultraviolet irradiating device and two or more lamp houses which are arranged in the moving direction of the two-piece can and which are apart from the first ultraviolet irradiating device and irradiate the can barrel with parallel ultraviolet rays from the other side of the two-piece can. It consists of 2 ultraviolet irradiation devices,
A two-piece can UV irradiation device in which the parallel ultraviolet rays emitted from the lamp house and the moving direction of the two-piece can make the angle clockwise, which is different for each lamp house. 3. The ultraviolet irradiation device for a two-piece can according to claim 2, wherein a plurality of sets of ultraviolet irradiation devices are provided with the first ultraviolet irradiation device and the second ultraviolet irradiation device as one set. 4. The first ultraviolet irradiating device and the second ultraviolet irradiating device each have three lamp houses, and in the first ultraviolet irradiating device, the first ultraviolet irradiating device and the second ultraviolet irradiating device have a first lamp housing with respect to the moving direction of the two-piece can. The angle between the parallel ultraviolet rays from the lamp house and the moving direction of the two-piece can is 30 to 60 degrees clockwise,
It is 90 degrees in the second lamp house and 150 to 120 degrees in the third lamp house. In the second ultraviolet irradiation device, parallel ultraviolet rays from the first lamp house with respect to the moving direction of the two-piece can. Forms an angle of 210 to 240 degrees clockwise with the moving direction of the two-piece can, 270 degrees in the second lamp house, and 330 to 3 in the third lamp house.
The ultraviolet irradiation device for a two-piece can according to claim 2, wherein the ultraviolet irradiation device is 00 degrees. 5. The first ultraviolet irradiating device and the second ultraviolet irradiating device each have two lamp houses, and in the first ultraviolet irradiating device, the first lamp irradiating device and the second ultraviolet irradiating device have a lamp house. The angle between the parallel ultraviolet rays from the lamp house and the moving direction of the two-piece can is 40 to 65 degrees clockwise,
In the second lamp house, it is 140-115 degrees,
In the ultraviolet irradiating device, the angle formed by the parallel ultraviolet rays from the first lamp house with the moving direction of the two-piece can is 220 to 24 clockwise with respect to the moving direction of the two-piece can.
The ultraviolet irradiation device for a two-piece can according to claim 2, wherein the irradiation temperature is 5 degrees and 220 to 295 degrees in the second lamp house. 6. The ultraviolet light of a two-piece can according to claim 2, wherein the lamps of the two or more lamp houses of the first ultraviolet irradiation device and the second ultraviolet irradiation device are arranged on a straight line or on an arbitrary arc. Irradiation device. 7. The lamp house of the three or more lamp houses of the first ultraviolet irradiation device and the second ultraviolet irradiation device is arranged on an arbitrary arc or apex of a triangle, and the arc or triangle is irradiated. The ultraviolet irradiation device for a two-piece can according to claim 2, wherein the ultraviolet irradiation device is in a position that is concave or convex with respect to the can. 8. An ultraviolet irradiating device of each of the first ultraviolet irradiating device and the second ultraviolet irradiating device, and a surface opposite to the irradiated can and parallel to the moving direction of the two-piece can, The ultraviolet irradiation device for a two-piece can according to claim 2, wherein an auxiliary reflection mirror is installed in a range where parallel ultraviolet light emitted by each ultraviolet irradiation device reaches.