Electric glass lehr heating

Wed, 22 Jul 2026 05:50:02 +0800

Getting Your IR Lamps to Actually Work With Your Glass

Here is the problem with standard infrared lamps: they’re often just shouting into the void. They pump out energy, but if that energy doesn’t line up with what your glass actually wants to absorb, most of it just bounces right off. Imagine your lamp is hitting at 2.0 microns, but your specific glass additives are only listening at 3.5. You’re paying for the power, but the glass isn’t taking it. We fix this by tuning the infrared spectrum to match the actual chemical “fingerprint” of your glass.

Glass annealing lehr lamp

Sat, 11 Jul 2026 10:48:05 +0800

Stopping Glass from Cracking in the Lehr

Nothing kills a production run faster than the sound of glass shattering. It usually happens because the temperature shifted too quickly. If you hit cold glass with a blast of high-intensity heat, it’s going to crack. Period. To stop that from happening, we use shortwave infrared (IR) lamps in the annealing lehr. The secret here is how fast we can change the power.

Why Speed Matters

If you want to avoid thermal shock, you need a heater that actually listens to your controller the second you move the dial. Old-school resistive heating elements are slow. They take minutes to warm up or cool down. But these IR lamps? They have very little thermal mass. They hit full power in milliseconds. It’s almost instant. We hook these lamps up to SCR (Silicon Controlled Rectifier) power controllers. This lets us dial the wattage up or down in real-time. Instead of a sudden heat spike, you get a smooth, gradual slope. This keeps the surface and the core of the glass heating up together, so you don’t build up that dangerous internal stress.

Lehr on Infrared Heating Experts

Electric glass lehr heating

Getting Your IR Lamps to Actually Work With Your Glass

Glass annealing lehr lamp

Stopping Glass from Cracking in the Lehr

Why Speed Matters