Quartz glass sleeve for lamp

Mon, 27 Jul 2026 10:23:56 +0800

The Headache of Cold Spots in Tunnel Kilns (And How We Fix It)

Most IR lamps stop at 1.5 meters. That sounds fine on paper, but when you’re building a long glass tunnel kiln, those short segments are a nightmare. Why? Because every single joint becomes a “cold spot.” You end up with uneven heating that messes with your quality. We decided to stop settling for that. Instead, we build custom continuous infrared units that push way past the 2-meter mark. Getting the heat right You can’t just stretch a filament and hope for the best. If you cram too many watts into one long tube, you’ll get hot spots that burn the lamp out fast. Here’s how we handle it: we obsess over the linear power density. We balance the voltage and wattage so the heat stays flat across the entire span. No gaps. No surprises. Just a steady, consistent glow from end to end. Dealing with the “Bend” We use high-purity quartz glass because it handles the heat and lets the radiation through without soaking up the energy itself. But there’s a catch. When a tube gets to 2 meters or more, it gets fragile. Physics kicks in, and the glass starts to bow under its own weight. If that happens, your heat focal point shifts, and you’re back to square one. To stop that, we use reinforced mounting brackets. They keep the tubes straight and steady, so the heat hits exactly where it’s supposed to. The real-world trade-offs Look, nothing is perfect. The big win here is a smooth, continuous heat zone. But there is a trade-off: maintenance. If a 2.5-meter tube pops, you have to replace the whole thing, not just a tiny section. It’s a bigger job. Because of that, you need to make sure your team actually has room to slide these long tubes out of the kiln without banging them against the frame. We also suggest using heavy-duty connectors—the cheap ones will pit and fail under this kind of current. One last thing: these long-run units put out a lot of ambient heat. Make sure your cooling fans are beefy enough to keep up, or you’ll be fighting a different kind of heat problem.

Sleeve on Rapid Infrared Heating Solutions

Quartz glass sleeve for lamp

The Headache of Cold Spots in Tunnel Kilns (And How We Fix It)