Infrared lamp for glass slumping

Fri, 26 Jun 2026 02:29:20 +0800

On the bending line, slumping cycles come down to heat control. If the thermal field is off, you’re chasing shape drift, optical distortion, and thermal stress that can crack parts later in tempering. Convection ovens eat minutes and fight you on holding tight temperature profiles. What matters under the hood Our infrared slumping setup leans on short-wave quartz emitters for fast, direct radiant energy. Peak power density hits 60 W/cm², so a 4–6 mm float sheet can see a 1500°C ramp in 8–10 seconds. Across the slumping zone, we hold ±3°C at setpoint, so the glass sees the same heat profile edge to edge. The system runs 380 V three-phase, draws 30 kW per meter, and drops into standard ceramic holders and reflectors without a redesign. Why this approach holds up in practice Slumping is about repeatable sag without overshoot. Tight uniformity cuts thermal gradients, which lowers stress marks and helps yield on coated and laminated assemblies. Fast ramps shrink the dwell window, so typical bending sequences move 20–30% quicker. Energy use drops because the power goes straight into the glass, not into heating air. We’ve seen units run 5,000+ hours with less than 5% output drop. Here is the thing with infrared slumping: it’s line-of-sight. Emitter layout has to match the glass shape and travel path. Surface emissivity shifts with coatings, so you tune power density and dwell to keep the glass in the target temperature band. Operators need pyrometers or closed-loop feedback to keep thin edges from running hot. Commissioning is short if you take the time to align lamps, reflectors, and the conveyor profile.

Slumping on Efficient IR Heating Emitters

Infrared lamp for glass slumping