Getting Infrared Heating Right for Long Glass Tunnel Kilns
If you’re heating quartz glass in a massive tunnel kiln, you know the struggle. You need a steady, reliable heat profile over a huge distance. But once you hit that 2-meter mark, standard lamps just stop working for you. They aren’t built for that kind of scale. That’s why we build custom, continuous infrared units. We design them specifically for these giant footprints so you don’t have to deal with those annoying cold spots that ruin a batch. The battle with length and power Here’s the thing: when a lamp gets longer than 2 meters, physics starts to fight you. You deal with voltage drops and filaments that want to sag or burn out right in the middle. It’s a headache. We solve this by obsessing over the tungsten coil pitch and carefully dialing in the wattage. We make sure the heat is just as intense at the very last centimeter as it is at the first. Why? Because if the heat isn’t perfectly uniform, your large glass sheets will warp. And nobody wants that. Making it continuous We don’t just slap a few tubes together. We design these as truly continuous units. By overlapping the lamps, we get rid of those gaps you usually see in modular systems. We use heavy-duty quartz glass because these things take a beating under constant thermal stress. Plus, we make them “drop-in” replacements. You can just wire them into your existing kiln without having to tear apart your electrical cabinet and start from scratch. A few things to watch out for Now, there’s a trade-off. These high-density arrays pull a lot of power. They put out an incredible amount of heat, but a lot of that heat ends up soaking into the kiln housing. You’ve got to make sure your cooling fans and vents can actually keep up. If the housing gets too hot, your connectors and lamp ends will fry. To keep things safe, we always suggest using high-temp wiring. It’s a small detail, but it’s the difference between a smooth run and a midnight emergency repair.