(1) has lower energy consumption and high effective luminous efficiency, which can reduce energy consumption by 70% ~ 80%.
(2) No ozone is generated in the curing process, and the LED-UV light source does not generate short-wave ultraviolet light, so no ozone is generated in the curing process, and a clean working environment can be maintained without installing auxiliary devices such as deodorizers and exhaust pipes, which makes the LED-UV curing device also suitable for factories with dense buildings around.
(3) More flexibility. The LED-UV light source is a point light source, and the irradiation range can be set in stages according to the paper size.
(4) The light can be turned on (off) instantly. The traditional ultraviolet light source needs preheating 1 min to start and cooling for 4 minutes to turn off. In order to improve work efficiency, many operators usually keep the ultraviolet light source on all the time, which causes great waste. The LED-UV light source can be turned on instantly during printing, and the working efficiency is greatly improved.
(5) The calorific value is small, the photoelectric conversion efficiency of LED-UV light source is high, and the surface temperature of the lamp tube is only about 60℃, which can effectively prevent the printed matter from shrinking and deforming due to overheating, thus achieving high overprinter accuracy.
(6) Long service life. The service life of LED-UV light source can be as high as 20,000 ~ 30,000 hours, which is more than ten times that of existing high-pressure mercury lamps and metal halogen lamps (1500 hours), which can greatly reduce the number of light source replacement.
Step 2 limit
(1) The irradiation intensity is weak, and the printing speed is too fast, which easily leads to incomplete curing of ink.
(2) It can only emit long-wave ultraviolet light, but not short-wave ultraviolet light, so it is not conducive to the curing of UV varnish.
(3)LED-UV light source is expensive.
(4) This is because the LED-UV light source has a short irradiation distance, and it must be irradiated close to the surface of the printing material to ensure the good curing of the ink.