UV Curing Machine and UV Radiometer
UV curing (ultraviolet curing) is the process by which ultraviolet light is used to initiate a photochemical reaction that generates a crosslinked network of polymers. UV curing is adaptable to printing, coating, decorating, stereolithography, and in the assembly of a variety of products and materials. In comparison to other technologies, curing with UV energy may be considered a low temperature process, a high speed process, and is a solventless process, as cure occurs via direct polymerization rather than by evaporation.（Quoted from Wikipedia) (UV radiometer for its measurement).
1. UV curing principle
The UV curing principle is that the glue is exposed to UV irradiation and the chemical polymerization reaction is produced. So as to produce the effect of the solid. It is important to choose the suitable UV spectrum of the light source and the suitable curing time. the frequently-used UV band is the UVA UVB, UVC and UVV 4 bands. The most commonly used is UVA band, That’s peak wavelength is 365nm. The response wavelength of the glue and UV light source should be the same band, otherwise, the cure is not significant. In order to improve the curing efficiency, we need to consider the power intensity of UV, UV curing machine, the illumination time, the temperature and other factors. Choosing appropriate parameters is essential for high efficiency of UV curing.
The curing affected by many factors, the generating of a number of devices around the UV curing industry. The UV light intensity of the light source is particularly important, UV light source will decay in use after a period of time, then we need to use UV Radiometer to measure and determine the light source is still valid, if the light attenuate, curing machine running up is less effective.
Different size needs to be cured of the object, it will produce a different type of curing machine. portable, desktop, factory hanging type, large floor type and UV curing box. Different light source, the size of small or big, the number of Watts also has provisions, but the use of UV Radiometer are the same, only need to select a corresponding band of UV Radiometer, can be helpful in UV curing processing.
2. UV radiometer used for testing UV curing light sources
There are several UV Radiometers in Linshang, if it's UV high pressure mercury lamp, select corresponding band of UV Radiometer is LS120 and LS125 host+UVA probe. if it's UV LED light source, select corresponding band of UV Radiometer is LS128 and LS125 host+UVALED probe. We’ll highlight that LS120 UV Radiometer and LS128 UV Radiometer can record the UV intensity and temperature in real time. They can also display UV intensity and temperature curves. We also provde PC software and the UV radiometer can be connected to the PC to print test report. As a new curing method, the advantages of UV light curing are short curing time and environmental protection, which can improve the production efficiency obviously.
If you want to know how to calculate Ultraviolet energy and UV light intensity, please read "How to Calculate UV energy and intensity by UV integrator?".
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