Getting the IR Waveband Right for Your Brake Pads
Here’s the thing about drying brake pads: you can’t just treat them all the same. Ceramic and semi-metallic compounds are totally different beasts when it comes to infrared (IR) energy. If you try to use the same lamp setup for both, you’re asking for trouble. You’ll either end up with a damp core or a scorched surface. Neither is a good look. The trick is in the absorption. Semi-metallic pads are packed with copper and steel fibers, so they soak up heat fast. Too fast. If you hit them with high-intensity short-wave IR, the surface temperature spikes instantly. That’s how you get cracks. Ceramic pads are a different story. They tend to reflect more light and don’t take the heat as readily. To fix that, we shift toward medium-wave IR. It pushes the heat deeper into the material. It stops that annoying “skin effect” where the pad feels dry to the touch, but the inside is still wet. Picking your gear We don’t just crank up the wattage and hope for the best. That’s a recipe for disaster. Instead, we pick the emitter based on how much heat the material actually needs. Short-wave halogen tubes are great for a fast ramp-up, but you have to be careful. If the distance isn’t exactly right, you’ll get hotspots. And don’t forget your conveyor footprint. Sure, high-wattage lamps move more product through the line, but they’ll hammer your electrical panels. Plus, if you’re packing in high-density arrays, you better have some serious cooling fans. Otherwise, the heat buildup around the housings will just fry your connectors. Finding the sweet spot It always comes down to a trade-off: speed versus uniformity. Going too fast cuts your cycle time, but it risks thermal shock. To get around this, we layer the heating zones. We start with a gentle “soak” to warm things up, then hit it with a high-intensity burst at the end. That way, the pad reaches the right temperature all the way through without warping. It just works.