JPH05139086A - Method for drying side surface of bar-like body such as pencil printed or coated with uv ink or uv paint - Google Patents

Abstract

PURPOSE:To provide a novel method wherein ink or painting material on a part of a bar-like body is not separated and UV rays are evenly applied to said body to provide a stable quality thereof and further the body can be put on a conveyor with ease to improve work efficiency. CONSTITUTION:The opposite end corners of a bar-like body of pencil 1, on the entire side surface of which is printed or coated with UV ink or UV painting material, are brought into point contact or line contact with inclined conveyors 9, 10 respectively. While the body is being transferred in such a state, ultraviolet rays are applied to the upper half of the body from above and a reflector 14 disposed between the conveyors 9, 10 on both sides reflects the ultraviolet rays to irradiate the middle portion of the lower half of the body, following which the middle portion of the underside of the bar-like body is supported by a conveyor 15 to transfer it, while ultraviolet rays are applied from above to reflectors 19, 20 provided on opposite sides of the conveyor 15 so that the reflectors reflect the rays to apply them to the opposite end portions of the lower half of the body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drying the peripheral side surface of a rod-shaped body such as a pencil shaft printed or painted with UV ink (ultraviolet curable ink) or UV paint (ultraviolet curable paint).

[0002]

2. Description of the Related Art As a method for drying and curing the UV ink or UV paint adhered to the peripheral side surface of a rod-shaped body such as a pencil shaft printed or painted on the peripheral side surface with UV ink or UV paint by irradiating with ultraviolet rays, Conventionally, there are mainly a reflection method and a rotation method.

First of all, in the reflection system, a reflecting plate is arranged in series to form a conveyor, and a rod-shaped body is supported on the conveyor by a jig. Ultraviolet rays are directly applied to one half of the rod, and the ultraviolet rays reflected by the reflector are applied to the lower half of the peripheral side surface of the rod-shaped body.

In this method, since the rod-shaped body is supported by the jig on the reflection plate, ink or paint on the portion of the rod-shaped body that comes into contact with the jig is peeled off, or the jig is shaded against the reflected ultraviolet rays. Therefore, there is a problem in that the lower half of the peripheral side surface of the rod-shaped body is irradiated with ultraviolet rays unevenly, resulting in non-uniform quality.

Next, in the rotating method, rotating rolls are arranged to form a conveyor, and while the rod-shaped members are placed between the rolls and conveyed, ultraviolet rays are radiated from above the conveyor, and the rod-shaped members are also rotated by the rotation of the rolls. Then, ultraviolet rays are applied to the entire peripheral side surface of the rod-shaped body.

In this method, since the roll rotates, it is difficult to place the rod-shaped body between the rolls,
If this timing is deviated, there is a problem that there will be two rod-shaped bodies that should be placed between the rolls one by one, and it also takes time to manage and adjust the rolls, which is difficult to handle. In addition, there is also a problem that speeding up is impossible in consideration of the above timing difficulty.

[0007]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to prevent the ink or paint from being partly peeled off, to prevent the ultraviolet rays from irradiating the entire peripheral surface, to stabilize the quality, and to make the rod-shaped body smooth. The present invention provides a method for drying the peripheral side surface of a rod-shaped body such as a pencil shaft printed or painted with UV ink or UV paint that can be sent to a machine to improve the work efficiency.

[0008]

In order to achieve the above object, the method of drying the peripheral side surface of a rod-shaped body such as a pencil shaft printed or coated with the UV ink or UV paint of the present invention is a UV ink on the entire side surface. Alternatively, while the pencil shaft 1 or other rod-shaped body printed or coated with UV paint is conveyed while being in point contact or line contact with the inclined conveyors 9 and 10 at both end corners, ultraviolet rays are emitted from above. Is irradiated to the upper half part and is irradiated with the ultraviolet rays reflected by the reflector 14 arranged between the conveyors 9 and 10 on both sides to the central part of the lower half part, and then by the conveyor 15 which supports the central part of the lower surface of the rod-shaped body. Reflectors 1 which are arranged on both sides of the conveyor 15 by being irradiated with ultraviolet rays from above while being conveyed.
It is characterized in that the ultraviolet rays reflected by 9, 20 are applied to both end portions of the lower half portion.

[0009]

The rod-shaped body is subjected to two-step UV irradiation by first supporting both end portions of the rod-shaped body to dry the central portion of the lower half and then supporting the central portion of the rod-shaped body to dry both end portions. There is no need to support the jig with a jig or rotate the rod.

[0010]

Embodiments will be described below in detail with reference to the drawings. This example shows a method of drying the peripheral side surface of the pencil shaft 1 printed with UV ink. First, the apparatus used in the examples is configured as follows. As shown in FIG. 1, an extruding plate 3 is arranged under a hopper 2 that accommodates a large number of pencil shafts 1 and drops the pencil shafts one by one from a lower end opening thereof, and an ink kneading roll 4 and a printing plate are provided in front of the extruding plate 3. A printing device 8 including a rotary printing machine 5, a rotary printing machine 6 and a printing press plate 7 is arranged, and a pair of inclined conveyors 9 and 10 are arranged below the printing device 8 so as to face each other in an inverted C shape. The first UV irradiation device 1 including a UV lamp 11 and a reflector 12 above the required positions of the conveyors 9 and 10.
3 are provided, and the conveyors 9 and 1 are provided directly below the first UV irradiation device 13 and below the conveyors 9 and 10 on both sides.
The reflector 14 is arranged at an intermediate position of 0,
In front of 10, another stepped belt conveyor 15
A second UV irradiation device 18 including a UV lamp 16 and a reflector 17 is arranged above a required position of the conveyor 15. The second UV irradiation device 18 is provided directly below the second UV irradiation device 18 and below the conveyor 15 and further to the conveyor 15 Reflectors 19 and 20 are arranged at both side positions of the reflectors 19 and 20, respectively.

As shown in FIG. 2, the pencil shaft 1 whose peripheral surface is printed by the printing device 8 is first conveyed by placing the corner edges of both ends on the conveyors 9 and 10, respectively.
It is carried to the first UV irradiation device 13. In this first UV irradiation device 13, as shown in FIG. 3, ultraviolet rays are directly applied to the upper half of the entire pencil shaft 1 from the UV lamp 11, and a reflector is provided on the lower half of the central portion of the pencil shaft 1. 14
The ultraviolet rays reflected by are applied. Next, as shown in FIG. 4, the pencil shaft 1 is passed from the conveyors 9 and 10 to another conveyor 15 in front of it, and as shown in FIG.
Is carried to the second UV irradiator 18 while being supported by the conveyor 15 at the central portion of the lower surface. This second UV
In the irradiation device 18, as shown in FIG. 6, the ultraviolet rays emitted from above are reflected by the reflectors 19 and 20 to irradiate both end portions of the lower half of the pencil shaft 1. As a result, the entire peripheral side surface of the pencil shaft 1 is uniformly irradiated with ultraviolet rays and the drying process is completed.

[0012]

The present invention is as described above. UV irradiation is divided into two stages, the central portion of the lower half of the rod is dried in the first stage, and the lower half of the rod is dried in the second stage. Since both end portions can be dried and the entire upper half of the rod-shaped body can be dried through the first step and the second step, there is no irradiation unevenness on the peripheral side surface of the rod-shaped body, and the quality is stabilized.
Next, the rod-shaped body is first conveyed by being placed in a point contact or line contact state on the inclined conveyors at both end corners thereof, and dried at the lower half center part by the first stage UV irradiation. Since, since the dried lower half central portion is transported while being supported by the next conveyor, the undried portion on the peripheral side surface of the rod-shaped body never contacts the conveyor or the like during the entire process, and the printing surface Alternatively, it is possible to completely prevent the peeling of the ink or paint on the painted surface. Further, since the present invention does not rotate the rod like the conventional example, it is of course not necessary to use a conveyor or the like constituted by a rotating roll, and naturally the timing of placing the rod on the conveyor is difficult. It is also possible to improve work efficiency by speeding up, freeing from problems such as sex. Also in terms of equipment, there is an advantage that the cost can be reduced as compared with the above-mentioned reflection method and rotation method.

[Brief description of drawings]

FIG. 1 is a schematic side view of the entire apparatus.

FIG. 2 is a plan view of a portion A of FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a plan view of a C portion of FIG.

5 is a plan view of a D portion of FIG. 1. FIG.

6 is a cross-sectional view taken along the line EE of FIG.

[Explanation of symbols]

1 Pencil Shaft 2 Hopper 3 Extrusion Plate 4 Ink Kneading Roll 5 Printing Plate 6 Printing Machine 7 Printing Press Plate 8 Printing Device 9 Conveyor 10 Conveyor 11 UV Lamp 12 Reflector 13 1st UV Irradiation Device 14 Reflector 15 Conveyor 16 UV Lamp 17 Reflector 18th 2 UV
Irradiation device 19 Reflector 20 Reflector

Claims (1)

[Claims] 1. A rod-shaped body such as a pencil shaft 1 which is printed or coated with UV ink or UV paint on the entire circumference of a side surface thereof, first comes into point contact or line contact with conveyors 9 and 10 whose both end edges are inclined, respectively. The upper half part of the conveyor 9 and 10 is irradiated with ultraviolet rays from the upper side while being conveyed while being conveyed.
Ultraviolet rays reflected by the reflector 14 arranged between the two are irradiated to the central portion of the lower half portion, and then, while being conveyed by the conveyor 15 which supports the central portion of the lower surface of the rod-shaped body, the ultraviolet rays are emitted from above to convey the ultraviolet rays from the conveyor 15. A method for drying the peripheral side surface of a rod-shaped body such as a pencil shaft printed or coated with UV ink or UV paint, characterized in that the ultraviolet rays reflected by the reflectors 19 and 20 arranged on both sides are applied to both end portions of the lower half.