JP3135092U - Planar UV irradiation plate by UV LED - Google Patents

Abstract

[PROBLEMS] A low cost, long life, and low running cost.
An ultraviolet LED is used instead of an ultraviolet lamp. Ultraviolet LEDs simply generate only ultraviolet rays, so there is almost no heat generation, no heat countermeasures are required, equipment can be simplified, and cost reduction can be realized. In addition, the lifetime is long and the running cost is greatly reduced. The low irradiation energy per UV, which is a weak point of ultraviolet LEDs, can be solved by irradiating a large number of LEDs side by side. In order to solve the size of the workpiece and the processing speed by changing the area by combining the planar irradiation plates, the structure can be easily enlarged or reduced by combining the planar irradiation plates.
[Selection] Figure 1

Description

  The present invention is an apparatus for curing an ultraviolet curable resin with small energy.

In recent years, ultraviolet curable resins are being developed and used for the purpose of surface protection and adhesion, and these resins are becoming increasingly popular as environmentally friendly processing methods because they contain less solvent.
Since UV curable resin is cured in a short time when irradiated with UV rays, the process is short, the processing apparatus can be downsized, and energy and resources can be saved.
Usually, an ultraviolet lamp is used to process the ultraviolet curable resin.
Although an ultraviolet lamp generates ultraviolet rays, it is necessary to take countermeasures to generate unnecessary visible rays and infrared rays (heat rays) at the same time.
Infrared rays (heat rays) generated from an ultraviolet lamp cause a problem of causing thermal damage to the workpiece, and an infrared ray blocking layer and a cooling device are required.
Since the ultraviolet lamp generates high energy, its life is short and the lamp needs to be replaced frequently.
Some LED's that generate UV light efficiently are being developed.
Some LEDs emit light with very little energy.
Many LEDs can be arranged to achieve UV curing similar to that of UV lamps.

Instead of conventional UV lamps, UV LEDs are used to cure the resin by irradiating only the necessary UV light.
Ultraviolet LEDs simply generate only ultraviolet rays, so the most efficient UV curing can be achieved.
Since UV LEDs do not generate infrared rays (heat rays), no countermeasures are necessary.
LEDs have a long life span, 30,000 hours to 50,000 hours, and are about 5 to 10 times longer than UV lamps, which can greatly reduce the cost of UV curing.
The power consumption of LEDs is as small as about 200W per square meter, and less than half the power consumption of UV lamps can save energy.
Although the energy per UV LED is small, a large number of LEDs are arranged in a flat plate shape to irradiate the processed object uniformly, so there is no thermal damage to the processed object.
UV LEDs generate little heat, so the equipment is simple and the cost of equipment is greatly reduced.
Since the size can be changed freely by combining the UV irradiation plate vertically and horizontally, it is easy to handle small workpieces, large workpieces, and high-speed workpieces.
Since the ultraviolet irradiation plate can be installed inside and outside the cylinder, processing on a roll is also possible.
The UV irradiation plate can be easily repaired even if it is broken or broken, so it can be easily repaired, and the cost can be greatly reduced compared to conventional UV lamp replacement.

Top view of UV LED and planar irradiation plate Cross section of UV LED and planar irradiation plate Combination of planar irradiation plates

Explanation of symbols

1 Substrate base 2 Current control circuit 3 UV LED
4 Power supply lead wire 5 Wiring 6 Combination of planar irradiation plates A Horizontal direction, LED chip spacing B Vertical direction, LED spacing

Claims (4)

    An ultraviolet irradiation device that has the simplest manufacturing cost by connecting 3 to 30 LED chips that emit ultraviolet rays and a current control circuit in series.     A vertical UV irradiation plate that arranges UV LED chips at vertical and horizontal intervals of 5mm to 50mm, radiates uniform UV radiation radially, and emits uniform UV radiation in a flat shape. The edge of one planar irradiation plate is half the UV LED chip interval,
A planar ultraviolet irradiation plate in which UV LED chips in the vertical and horizontal directions are arranged at the same interval when they are connected to the vertical and horizontal sides for enlargement. The ultraviolet curable resin processing apparatus which cures an ultraviolet curable resin more effectively with small energy by the structure of said 1-3.

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