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Rich Smylie, GMN
By Richard Smylie | Sep 28, 2018
Exploring the process of magni-lens doming at GMN

Versatile and durable, magni-lens doming is a clear two-part urethane development which when applied to a substrate, creates a self-healing dome that stands 0.06” (1.5mm) tall. The most unique feature of Magni-lens doming is that it functions as both a visual and performance enhancement. Visually, it adds richness and a depth of field to the graphics below, and from a performance standpoint, it can withstand the most extreme environments. 

Filmed at our Monroe, NC Division, our latest video will bring you a step closer to the Magni-lens technology. The video not only provides a glimpse into the process of creating the urethane dome, but also illustrates the broad spectrum of industries and products that have embraced magni-lens doming.

To initiate the doming process, the parts are staged on sheets so that they register precisely with the doming machine’s dispensing nozzles. As seen in the video, the dome is created with a nozzle or a hose that meters out a clear urethane coating. As the nozzle glides over the part, it dispenses the urethane polymer across the entire surface. The parts are always placed at a well-maintained distance from each other to avoid ruining the neighboring part in case of an overspill. While the featured Excel dryer part in the video has seven nozzles operating at once, different projects require different settings. Multiple nozzles correspond to the number of parts that are getting domed at a given time and the machine at GMN’s Monroe, NC Division has the capacity to operate up to 24 nozzles simultaneously.

After the urethane is dispensed, the part is inspected to ensure that the coating has traveled all the way up to the edges of the part. The viscus resin gradually “wets out” the entire surface and the part is placed on leveling pads to air dry. Although the coating starts to harden with the “skinning of the urethane surface” in about four hours, it technically takes about a week for the part to be completely cured. Selective doming can also be achieved by using a dam to contain the resin to a specific area. The entire process of Magni-lens doming is performed in a semi-clean room to mitigate dust and foreign particles from entering the water-clear dome.

The size of the part determines the amount of resin dispensed. Since parts come in varying sizes, each of them requires differing amounts of coating. The machine is uniquely programmed for every project, where it measures the length of the part to determine the space necessary between the parts in the set-up stage. Other elements such as the pour speed and the length to which the nozzle travels vertically above the part are also customized.  

The resulting magni-lens dome construction is extremely robust, chemical and moisture resistant, easy to clean and sanitize, and doesn’t deform with heat and fluctuating temperatures. Its versatility, functionality, and compatibility to adhere to a wide range of substrates including polycarbonate, polyester, vinyl, aluminum, and stainless steel, makes it a great choice for both indoor and outdoor applications. Seen widely in industries like automotive, appliances, electronics, and medical, the video will give you a glance into some of nameplates created by GMN over the past few decades.

To see the doming process in action, check out our video below.