Advantage of uvled

       Compared with traditional UV curing equipment, the mercury lamp has a service life of only 800-3000 hours, and the UV LED curing system has a service life of 20,000-30,000 hours. The LED method can be lit only when ultraviolet light is needed. When DUIY=1/5 (preparation time=5 irradiation time=1), the service life of the LED method is equivalent to 30-40 times of the mercury lamp mode. Reduced lamp replacement time: increased productivity and energy savings. However, when the conventional mercury lamp curing device is in operation, since the mercury lamp starts slowly, and the opening and closing affects the life of the lamp, it must be always lit, which not only causes unnecessary power consumption but also shortens the working life of the mercury lamp.

       No heat radiation

High power LEDs are not emitted from infrared light. The surface temperature of the irradiated product rises below 5 °C, and the conventional mercury lamp type ultraviolet curing machine generally raises the surface of the irradiated product by 60-90 ° C, causing the positioning of the product to be displaced, resulting in defective products. UV-LED curing method is most suitable for heat sensitive and high precision bonding process requirements such as plastic substrate, lens bonding and electronic products, fiber optic cable.

       Super illuminance

Using high-power LED chips and special optical design, the ultraviolet light achieves high-precision, high-intensity illumination; the ultraviolet light output reaches 4500mW/m2. Using the latest optical technology and manufacturing process, it achieves high-intensity output and uniformity that is more optimized than traditional mercury lamp irradiation methods. It is almost twice the illuminance of traditional mercury lamps, which makes UV adhesives cure faster and shortens. Production time has greatly improved production efficiency.

In the conventional mercury lamp mode point source curing machine, when the irradiation channel is increased, the increase of the channel causes the output energy of the single illumination channel to decrease. With LED-type illumination, each illumination head emits light independently, and the illumination energy is not affected by the increase of the channel, and is always kept at the maximum value.

Due to its extremely concentrated illuminance, UV LEDs reduce the exposure time and increase productivity compared to mercury lamps.

       UVLED light curing machine application technical characteristics

       UV curing machine has been used in the photovoltaic industry for UV glue photocuring. Now, with the continuous enhancement of optical power and the increased mapping area of UV curing machine, UV curing machine has broken through the optoelectronic industry in terms of skills. Application, gradually entering various industries, the heart printing industry has the most individuality, plastic sheet printing has been relying on screen printing before, due to the limitations of screen printing technology, it is impossible to print fine and advanced products, taking advantage of foreign equipment and new skills. The introduction of new technology, plastic sheet printing no longer relies on screen printing, offset printing UV printing in developed areas such as Guangdong and Zhejiang. Offset UV printing is characterized by fine craftsmanship, rich print patterns, strong stereoscopic effect, and color. Bright and multi-color overprinting with high precision and unique craftsmanship, can be printed and exquisite products and widely greeted and promoted. The products are widely used in the stationery industry, gift packaging industry, food industry, toy industry, advanced daily packaging industry, etc. The market prospects have led a large number of printers to rush to introduce the new technology of offset UV printing.

       Offset UV printing from the equipment on the offset press must be equipped with UV curing equipment such as UV curing machine, usually UV curing machine, uv dryer, uv curing machine and other UV machine and offset printing machine matching, but the market UV drying The process efficiency of equipment such as machine and UV curing machine can not meet the requirements of offset UV printing process, because the existing UV curing machine and uv curing machine on the market are applied in the screen printing UV light solid process of the screen printing industry. The core part of the UV light curing machine is a UVLED chip, and the UVLED chip is used as an illuminant, which has the advantages of a cold light source, low energy consumption, and no radiation.

       Offset UV printing process pleads for UV light solid drying speed must be synchronized with high-speed production of printing press, high-speed light solid drying, UVLED light curing released UV light can be set up to reflect the UV ink catalyst, Russia can be cured, it can be said The UVLED light-solid machine is sure to be satisfactory in terms of speed.

       Plastic sheet printing has previously relied on screen printing, and due to the limitations of screen printing, it is impossible to print fine and advanced.

       UV light curing applications

       UV curing technology, that is, UV curing technology, has the advantages of no inert solvent volatilization, short curing time, and low-temperature curing, which is incomparable to traditional curing technologies. It is called a new generation of green technology.

       Light curing technology is an energy-saving and environment-friendly technology that has been widely used in coatings, inks, adhesives, printing plates, electronics, micromachining and rapid prototyping.

       Applying the curing technology to the composite manufacturing process not only solves some of the process problems, but also facilitates the automation of large-scale modern industrial production, while meeting modern environmental requirements. The photocuring technology of resin-based composite materials is another new development direction of UV curing technology in recent years. The photocuring technology is applied in the field of composite materials, which is different from other fields. Because the parts are relatively thick (several mm or even several cm), the relationship between the curing process conditions of the photocurable resin system and the thickness of the part is studied. The progress of the material photocuring process has great guiding significance.

       Beijing University of Aeronautics and Astronautics selected T20 and 651 photoinitiators to prepare unsaturated polyester systems with initiator concentrations of 0.25, 0.5, and 1 wt%.

       The effect of the photoinitiator concentration on the degree of curing was determined by measuring the microhardness of the photocured sample. The results show that increasing the concentration of the initiator can inhibit the inhibition of oxygen, but for thicker samples, too high an initiator concentration will result in incomplete curing.

       In this experiment, the curing process of the photocurable resin system was determined by studying the effect of different photoinitiator concentrations on the curing behavior of the resin system. The advantage is firstly that the upper surface of the resin system is exposed to the air, and the degree of curing of the upper surface resin is affected by oxygen inhibition. When the incident light intensity is constant, increasing the concentration of the initiator can alleviate the inhibition of oxygen, thereby improving the surface solidification quality of the sample; when ultraviolet light passes through the resin layer, reflection, absorption and scattering occur, when incident When the UV intensity and the initiator concentration are constant, the degree of solidification of each layer (except the upper surface) decreases with increasing distance from the surface;

For the curing thickness required for this experiment, the amount of initiator used was less than that used in conventional UV coatings.

       This is because the concentration of the initiator is too large, and a high concentration of free radicals will be generated in the near-surface region of the resin. The light is absorbed and scattered in the upper layer so that the light reaching the depth of the sample is greatly weakened, so that the thick part cannot be thickened. Fully cured; comparing the two initiators, the curing performance of the initiator TPO is better than 651.

       The Institute of Materials Science and Technology of Wuhan University of Technology studied the effects of photoinitiators and thinners on the UV curing speed of general-purpose 191# unsaturated polyester resin. Studies have shown that photoinitiator types and diluent contents have an effect on the curing speed and they The content has the best value. For the UV curing reaction of 191# unsaturated polyester resin, the type and content of photoinitiator in the curing system, the content of diluent in the resin, etc. have an effect on the curing speed of the system. Choosing an appropriate curing system can greatly improve the curing. speed.