Stop the Squeal: Why Infrared is the Secret to Better Brakes
Ever wonder why some brakes just won’t stop that annoying, high-pitched squeal? Usually, it comes down to how they were cured. When the materials don’t set evenly, you end up with “hard spots” and internal stress. That’s where the vibration comes from. It’s a pain for the customer and a headache for the manufacturer. We’ve found a better way to handle this. Instead of sticking with those old-school convection ovens, we switched to shortwave infrared (IR) lamps. The trick is in how the heat moves. Hot air is slow. It hits the surface first and then takes its sweet time crawling toward the center. But IR is different. It actually penetrates the friction material. We use specific wavelengths that the resins in the brake pads just soak up. The result? The core of the pad heats up at the same time as the outside. Everything cures consistently, from the surface all the way through. Getting the settings right We use high-power density lamps because, let’s be honest, nobody wants to wait around. Pushing more energy into the part helps drive out volatiles and kicks off polymerization much faster. But you have to watch your line speed. It’s a bit of a balancing act. If the belt moves too fast, the center stays raw. Too slow, and you’ll scorch the surface. You just have to find that sweet spot between your wattage and how far the lamp sits from the part. A few things to watch out for These are quartz-envelope lamps. They’re tough enough for a factory floor, but they can still snap if they’re shaken too much. I always suggest using rigid mounting brackets to keep them steady. Also, make sure your controllers can keep up with how fast these things ramp up. One last thing: these lamps put out a ton of heat. Like, a lot. If you don’t get your exhaust hoods dialed in, that heat just hangs around the housing. That’s a recipe for fried electrical connectors and burnt-out lamps. Keep it cool, and the gear will last.