Ruggedizing Lens and Reflector Housings in Flashlights

Multi-Cure^® 621-T exhibited excellent adhesion properties and cured in seconds. The Dymax 2000-EC flood lamp provided the best curing solution for the 8" x 8" area.

Dymax application engineers, always looking for the next challenge, worked closely with the customer’s team to come up with an innovative solution. After researching and testing our customer’s parts, Multi-Cure^® 621-T was recommended to bond the glass lens to the reflector housing. The decision was made based on 621-T’s ability to adhere dissimilar materials, its fast cure, and excellent adhesion properties. To bond, the subassembly, the lens, and reflector housing were placed into a small rotary system underneath a dispensing valve and 621-T was applied in a uniform bead into the bond line. Our application engineers suggested using a Dymax 2000-EC flood lamp to cure parts post-assembly because it offered a large 8” x 8” curing area, as well as high-intensity curing in 5-30 seconds. The parts were assembled and then exposed to UV/visible light under the Dymax flood lamp. Rapid curing allowed the bonded parts to swiftly move onto the next step in the manufacturing process with virtually no down/wait time.