Getting Your Glass Tunnel Kilns to Actually Stay Hot
If you’ve ever managed a glass tunnel kiln, you know the struggle. You need a steady, predictable heat profile across a massive distance. But here’s the problem: standard, off-the-shelf lamps just don’t cut it. You end up with a mess of electrical junctions and those annoying cold spots that ruin a batch. That’s why we build custom quartz infrared units that go over 2 meters long. It simplifies the whole line. The struggle with long tubes Let’s be honest—making a quartz tube longer than 2,000mm is a mechanical nightmare. If you don’t do it right, the tubes sag. Or worse, they snap. We use high-purity quartz glass because it can actually handle the heat without losing its shape. But the real trick is in the filament. We carefully calibrate the winding density so the heat is spread evenly. Without that, you get “hot spots” in the middle, and your filaments burn out way too fast. Nobody wants to be replacing lamps every few weeks. Getting the power right When you’re dealing with these ultra-long runs, you have two choices: one long continuous unit or modular segments that overlap. Either way, the math has to be spot on. Here’s the thing: voltage drops. If you just plug these in and hope for the best, the end of the line is going to be colder than the start. To fix that, we tweak the wattage per meter. It ensures the heat flux stays the same from the first inch to the very last. Fitting them into your shop We build these for real factories, not labs. Space is always tight, so we keep the footprint small to give you as much heating zone as possible. One heads-up, though. Pushing that much power through a 2-meter tube creates a lot of ambient heat. If your housing gets too hot, the quartz weakens. You’ll want to make sure your cooling fans or vents are up to the task. The best part? We design these to be drop-in replacements. You can swap out your old tunnel frames without spending days in downtime. It’s just a matter of sliding them in and getting back to work.