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Welding and Joining Processes - Ultra Violet (UV) Glue
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UV gluing refers to a type of adhesive that is cured by exposure to a UV light source. UV cured glues are an excellent method of bonding that allows curing of the adhesive at a specific time in the manufacturing process rather than working around pot lives and curing times. The adhesive is applied to the joint and the parts assembled. When the bond is required to be cured, the joint is then exposed to the UV light source by shining a direct beam onto the joint or passing it through a UV light box. Curing typically takes only seconds.
To use UV cured adhesives, the adhesive itself must be accessible to the UV light. Therefore the process is only suitable for joining parts where at least one part is transparent. However, UV curing can also be used for other applications such as encapsulation where the surface of the adhesive is fully exposed to the UV light source.
Some examples of uses for UV cured adhesives are joining of clear plastic components and encapsulation of wirebonds, soldered joints and silicon chips in electronics manufacturing. UV adhesives lend themselves readily to automation using computer controlled dispensing equipment and light sources.
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