Dealing with the Headache of Long Glass Tunnel Kilns
Most IR lamps stop at about a meter. That’s fine for small jobs, but when you’re running a massive glass tunnel kiln, it’s a nightmare. You end up with a patchwork of tiny lamps, and that’s how you get cold spots. We decided to stop patching and start building. Now, we make custom continuous infrared units that stretch well over 2 meters. The struggle with length and power You can’t just stretch a quartz tube and call it a day. If you do, you’ll run into voltage drops across the filament. Here’s the thing: if the power distribution is slightly off, your glass warps. It’s that simple. We spend a lot of time balancing the electrical load so the heat is just as intense at the very end of the lamp as it is at the start. No surprises, just steady heat. What’s under the hood We use high-purity quartz because it can actually handle the thermal stress without cracking. These units are designed to sit end-to-end. No gaps. No dead zones. And because we’re pushing high wattage constantly, we use specialized connectors. You don’t want your wiring melting mid-shift. We stick with shortwave emitters. They hit the glass surface fast and hard, which is exactly what you need when your molding cycles are timed to the second. A few things to keep in mind You can swap these into your existing tunnel frames to replace those old, inefficient arrays. It works. But there’s a catch. Moving to a 2-meter+ system puts a massive amount of heat on your housing. If your cooling fans and vents aren’t up to the task, you’re going to melt your mounting brackets. Check your airflow before you flip the switch. Also, keep your supports rigid. A tiny bit of sag in a tube that long creates a hotspot, and a hotspot ruins a product. These units are built to take a beating in a loud, dirty industrial shop, but they still need a steady hand for the initial alignment. Get it straight, keep it tight, and they’ll do the heavy lifting for you.