27 October 2010Manufacturing / Production Technology, Hardware & Services
UV curing is a technology that arose from the areas of adhesive bonding, printing and lacquering. Based on the principle of polymerisation, adhesive, paint and lacquer that harden when exposed to UV radiation are used. Curing happens in a matter of seconds, which means fast process times combined with superior quality.
The UJ30 is Panasonic’s latest UV curing product and represents a further development of the successful UJ20 model. Commissioning is possible in just three steps: choose the LED head and necessary lenses; set the UV irradiation intensity; and set the curing time. Moreover, one controller can control up to four different curing processes. By combining four LED heads with wavelengths of 365 nm and 385 nm with 12 different lenses, almost any application involving UV curable resin or lacquer can be realised.
The UV LEDs for the UJ30 series were developed for time-critical applications that require immediate power output yet absolute stability. The heads are available for two wavelengths: 365 nm for standard applications with short cycle times and large distances, or the 385 nm type for curing resins at high volumes or thicknesses. Since the systems work with extremely narrow wavelengths, the entire intensity of up to 9200 mW/cm² can be used for curing, ie, loss of energy in the form of heat is avoided. In this way, the materials meant for bonding are protected from thermal destruction in addition to saving energy. Fans and other cooling elements are not necessary.
Temperature feedback control by way of the sensor heads enables stable irradiation intensity for long-term applications. At the same time, an external signal can be used to activate and deactivate UV irradiation needed only temporarily. In contrast to conventional curing lamps, LED models can be used at 100% intensity immediately after startup.
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