Out on the line, a screen protector run goes sideways when the heater can’t hold a uniform profile. You get warping, micro-cracks, and scrap that shows up as rejects and rework. We built our glass screen protector heaters to take that variability out, so the heating step behaves predictably shift after shift.
What matters under the hood
We run short-wave infrared elements in a quartz-based design, delivering fast, direct energy transfer with low thermal inertia. The heater face is laid out for even irradiance, so the glass heats evenly and you don’t fight thermal gradients that create stress during forming and tempering.
Power density runs 3–6 kW/m², with 240 V to 480 V options, and the modular footprint matches common conveyor widths. Control is solid-state relays with PID tuning, so you can hold setpoint within ±2°C across the active zone. The hot zone stays compact, which cuts convection losses and helps keep the process window stable.
Why it fits this work
In screen protector production, cycle time and dimensional stability drive yield. This heater comes up to temperature fast, so you can push line speed without giving up uniformity. Tighter thermal control means less edge stress, better bending repeatability, and more consistent coating drying—fewer scrap sheets and steady throughput.
Energy use drops because heat is delivered on demand, not wasted idling a big furnace body. On high-volume runs, that translates into fewer temperature-related defects and fewer line stops.
What to watch for
These heaters need a clean, dry mounting surface and proper clearance to avoid hot spots and convective bypass. They’re designed as drop-in modules for many standard frames, but alignment and edge insulation matter.
Expect a short warm-up to stabilize the profile, and keep emissivity consistent across glass types—dark or low-e coatings will change heat uptake. Plan on routine element inspection in harsh environments, and match conveyor speed to the heater’s dwell length so you don’t under- or over-heat.