In the printing process, UV light source can be used for sun-drying, color printing, paper packaging, decorative materials, printing tin cans and other external coatings UV curing; also can be used for non-silver salt negative, diazo salt film, film, resin plate, PS plate, exposure and so on. There are many kinds of special light sources, which are applied to different printing links according to their respective parameter characteristics. Here we introduce three kinds of special light sources: plate making, plate drying and light curing. Now let's enjoy their elegance together.
Plate making light source
The common plate making light sources are mainly divided into five categories. The first category is incandescent lamp, infrared lamp, halogen tungsten lamp; the second category is mercury lamp; the third category is metal halide lamp; the fourth category is xenon lamp; the fifth category is plate-making laser. Printing light sources, commonly used light sources are: carbon lamp, high-pressure mercury lamp, hernia lamp, fluorescent lamp (cold lamp), metal halogen lamp.
There are two kinds of UV curing light sources for UV hardening data: the electrode-type UV lamp and the electrode-less UV lamp. Electrode-type UV light source is made of a quartz tube. After vacuuming, a certain amount of mercury is injected or some special information is filled. One electrode is placed at each end and then sealed. The two electrodes are connected with the power supply directly by ceramic insulated conductors or metal joints. Electrodeless UV light source is made of a quartz tube, which is vacuum pumped, injected with a certain amount of mercury or filled with some special information and sealed. There is no electrode in the tube. UV light is produced by microwaves that cause mercury or special information in the tube.
Industrial UV curing is a very large application market, such as micro speaker/receiver, mobile phone camera, magnetic head HDD, coil, sensor, micro motor, CD/DVD optical head, mobile phone keyboard, digital camera, small LCD screen, touch screen, LED, display, lens assembly, crystal bonding, optical engine, optical device irrigation. UV glue curing for sealing/bonding/sealing products; macromolecule medical equipment bonding (catheters, needles, pumps, etc.); automotive parts/aircraft coatings/mobile phone/digital product shell coatings/packaging coatings UV curing; wood flooring/composite floor/furniture coatings curing; inkjet printing/flat printing/flexible printing/relief printing/screen printing Printing and ink drying; automatic dispensing and curing equipment/paint curing/ink curing; desktop/conveyor belt curing equipment; point curing equipment; DVD/CD production equipment; LCD production equipment; paint spraying and curing production line; semiconductor process equipment; small printing equipment; paint/ink development; equipment integration; glue/paint production equipment / Ink research and development; Conductive adhesive for semiconductor process; UV coating; camera lens technology for mobile phone; bonding technology for touch panel, etc.
Traditionally, UV mercury lamp, or UV mercury lamp, is used in the curing process. The life of this lamp is only 500 to 1000 hours, and it needs to be preheated before each use, so the actual effective use time is far less than 500 hours. Moreover, the traditional mercury lamp will produce a lot of heat and infrared rays, which will destroy the coating, so it needs to use a longer working distance to reduce the use efficiency; moreover, a large number of heat and infrared rays lead to high heat of the system, which needs to be matched with cooling system and air-conditioning equipment, coupled with huge equipment volume, large energy consumption and short life. Mercury and ozone are all the shortcomings of the traditional UV curing mercury lamp.