Getting Your Fiberglass Annealing Right—Even in Massive Tunnels
If you’ve ever dealt with fiberglass annealing, you know the headache. You need a perfectly steady soak of heat across a huge surface area. But once your tunnel kiln stretches past two meters, standard infrared lamps usually start to fail you. They just can’t keep up. That’s where we come in. We build custom, continuous infrared heating units specifically for these giant industrial setups. The struggle with length and power Here is the thing: when we’re building a unit longer than two meters, we can’t just “stretch” a tube and call it a day. If you do that, you end up with cold spots. To fix this, we use a continuous layout. No gaps. No modular banks. This means your fiberglass doesn’t hit a sudden “dip” in temperature as it slides through the kiln. You get a smooth, steady flow of heat. But a word of caution—when you push that much power through a long tube, the metal wants to bow. If your supports aren’t spaced just right, you’re going to have a problem. What we actually build it with We use high-purity quartz glass to protect the tungsten filaments. For annealing, we usually stick with medium-wave infrared. Why? Because it actually sinks into the glass fibers instead of just scorching the surface. These units are designed to be drop-in replacements. You shouldn’t have to rebuild your entire rack to make them work. We also beef up the end-caps. When a two-meter tube hits operating temperature, it expands—a lot. Without those reinforced caps, things get messy. If you’re working in a corrosive environment, we can add special coatings. Just keep in mind that this might tweak the emission spectrum a bit. The “hidden” side of installation Wiring these long arrays is where people usually trip up. You can’t just daisy-chain them and hope for the best. If you don’t account for the voltage drop across the line, you’re asking for trouble. We handle the electrical interface to keep that current loss as low as possible. And one last thing: these units put out a lot of radiant heat. Your kiln housing is going to get hot. Really hot. Make sure your exhaust blowers and cooling jackets are up to the task. If they aren’t, you’ll likely fry your control sensors, and then you’re back to square one.