Last week I worked with a specialty glass manufacturer who was experiencing a static issue in their fiberglass mat production. Their particular production cycle consists of a rotary spinning process where molten glass exits a furnace and goes into a cylinder with several holes that rotates at high speed, causing the glass to be “pushed” through the holes. Upon exiting the cylinder, the fibers are blown down on to a conveyor belt underneath, treated with a binder and pressed together, then sent to an oven to cure. After the sheets exit the oven, they are air cooled, cut to the desired length, then sent to a sorter that directs the material to collection bins, based on thickness and length. It is at this point that they were seeing the parts start to “bunch” up, which caused the system to be shut down so an operator could manually clear the jam and sort the mats. The customer has experienced static issues before in other parts of their plant and took some readings and were seeing a 4 kV charge on the surface of the mats.
After discussing the details of the application, I recommended they use our 24″ Ionizing Bar, the width of their widest mat. The Ionizing Bars produce a high concentration of positive and negative ions to eliminate the surface static of an object when mounted within 2″ of the surface of the material. At 2″ away, the units are capable of dissipating a 5kV charge in less than half a second. By placing a unit above and below the exit point of the sorter, they would effectively remove the surface charge and eliminate the potential jam.
Our Ionizing Bars are available in lengths from 3″ up to 108″ for a variety of small or wide surface treatment applications. For assistance selecting the best product for your specific requirements, please contact one of our application engineers at 800-903-9247.