Most of the domestic UV lamps are mercury lamps, and the shell material is quartz glass. One of the better characteristics of this glass is to transmit ultraviolet rays and block infrared rays. However, because the quartz glass is very thin, only 0.3mm, the insulation effect on infrared rays is not very significant. When the UV lamp is working, it emits full-spectrum rays, that is, infrared, visible and ultraviolet are all present at the same time. Due to the strong thermal effect of infrared rays, this leads to a sharp increase in the temperature of the UV region. Relying solely on thickened quartz glass to ensure the temperature effect in the UV area is not good. Once a domestic manufacturer specially purchased a quartz glass cover and installed it on the UV lamp tube. As a result, the aluminum alloy UV reflector imported from Germany was melted and damaged. In order to effectively prevent the intermediate layer from being too thick, or on the other hand, to effectively reduce infrared rays and reduce heat, the following points must be done.
First of all, to ensure the effectiveness of the cooling section, it is necessary to add a special exhaust and air supply device to it, so that it can dissipate the heat in time, and ensure that the product is UV cured at a lower temperature. Usually the best condition is that the product UV can be reduced to below 40 degrees before.
The second is to ensure that the UV section has a smooth air supply and exhaust system, and each UV lamp tube is equipped with an exhaust pipe, because the UV lamp tube is the largest heat source during normal operation, and the heat must be removed and dissipated in time. At the same time, in order not to make the air flow of the line body turbulent, the air volume must be supplemented while the air is exhausted, so an air supply device is also required. A more common practice is to arrange an exhaust link UV lamp tube on the top of the line body, and also arrange an exhaust air under one side of the line body to dissipate heat on the one hand, and to maintain the cleanliness of the UV room on the other hand. The air supply is arranged on the top of the line body, and natural air without heating is used at this time to facilitate timely cooling of the overheated area.
In addition, UVLED light source is used as the luminous body. UVLED light source is a pure ultraviolet light source, which does not produce infrared, visible light and other stray light during the work process, so the heat of light is reduced to a large extent. In addition, it is the UVLED chip. It is a single waveband that emits a single waveband of ultraviolet light. Although the overall capacity is as high as that of a mercury lamp (the light of different wavebands, high energy and high power consumption), the light power of a single wavelength is only one-tenth of the UVLED light source. Or even less. Therefore, UVLED light source, while reducing heat and increasing energy, is an irreplaceable UV curing light source.
