Continuous glass annealing heater

Mon, 27 Jul 2026 11:04:58 +0800

Getting Glass Annealing Right with Ultra-Long IR Heaters

If you’ve ever dealt with continuous glass annealing, you know the struggle. You need a perfect thermal gradient across the whole tunnel, or you’re looking at internal stress and broken glass. The problem? Standard lamps are usually too short. You end up with these annoying gaps in your heat profile. We solved that by building custom infrared units that stretch past 2 meters.

The trick to long-form tubes

You can’t just stretch a quartz envelope and call it a day. If you do, you’ll get hot spots. And hot spots mean cracked glass. To stop that, we play around with the wattage per centimeter. We usually go with high-voltage setups to keep the current flowing steady from one end to the other. It keeps the heat uniform. One quick heads-up: check your power supply. An array this long pulls a lot of current. If your wiring is too thin, you’ll get voltage drops, and your annealing will be all over the place.

Continuous on Infrared Quartz Heating Lamps

Continuous glass annealing heater

Getting Glass Annealing Right with Ultra-Long IR Heaters

The trick to long-form tubes