When you’re curing ultra-lightweight satellite antennas, you’re basically in a boxing match with gravity and heat. The problem is these thin-walled composite structures. If you throw them in a standard oven, the heat takes too long to soak in. By the time the resin actually sets, the part has already started to sag or warp under its own weight. It’s frustrating. That’s why we use short-wave infrared (IR) lamps. Instead of heating the air around the part, we hit the material surface directly. We tune the wavelength to hit the resin’s “sweet spot,” which triggers a fast reaction. It locks the geometry in place almost instantly. The best part? You don’t have to spend a fortune on massive, heavy tooling just to keep the shape from drifting. But you can’t just blast it with heat. If you do, you get “hot spots.” When one section of a reflector cures faster than the rest, it creates internal stress. The part twists. To stop that, we use zoned power control. We wire the lamps into separate circuits so we can dial back the power on the thin sections while keeping the ribs hot. It’s all about balance. Now, there is a catch. Running a high-density IR array—especially for something as big as a 5-meter reflector—pulls a massive amount of power. If your electrical panel can’t handle those peak currents, you’ll see voltage drops, and that’s a problem. You also have to keep a hawk-eye on the surface temp with pyrometers. If you overshoot your target by even 5 degrees, you’re looking at scorched composites or tiny micro-cracks. Keep your PID loops tight. Otherwise, you’re just making an expensive piece of scrap.
