Getting the Heat Right in Ultra-Long Glass Annealing Tunnels
If you’ve ever worked with glass container annealing, you know the headache of internal stress. You need the temperature to be just right, and you need it to stay that way across a massive distance. The problem is that standard lamps usually aren’t long enough. You end up with these annoying cold spots that mess up the whole batch. To fix that, we build custom infrared heating units that stretch past 2 meters. The trick to long-form heating You can’t just stretch a filament and call it a day. If you do, the voltage drops across the length and you get uneven heat. It’s a mess. We spend our time crunching the numbers on wattage per centimeter. We make sure the center of the tube is hitting the same temperature as the ends. When it’s done right, you get a smooth, consistent thermal profile across your entire tunnel. No surprises. Quartz and the “Striping” Problem We use high-purity quartz because it can take a beating from thermal shock without cracking. But here is the thing: alignment is everything. If these lamps aren’t perfectly parallel, you’ll start seeing heat stripes on your glass. It ruins the look and the quality. We set these up in a continuous array to make sure every inch of that radiation surface is working for you. Getting them installed Whether you’re swapping out old gear or building a brand-new line, we can make these fit. You can wire them in series or parallel—whatever your power grid prefers. Just a heads-up: pushing that much wattage through a 2-meter tube creates an incredible amount of heat. A lot of it. Make sure your cooling system and insulation are up to the task. If your lamp holders get too hot, you risk melting your wiring or warping your reflectors. It’s a small detail, but it’s the difference between a smooth run and a disaster. When it all clicks, your annealing zone stays stable. You stop worrying about glass breaking during the cooling phase and you can actually trust your output.