Stop the Bloating: Getting Your IR Heat Right
Ever open a batch of cans only to find them bloated? It’s a nightmare. Usually, it comes down to a bad seal. If that gasket doesn’t soften up completely, you’ve got a leak. The culprit is almost always the IR heating lamps. If the heat isn’t hitting the seal evenly, you get these annoying cold spots. One part of the seal is perfect, and the part right next to it is barely warm. The problem with “striping” Here’s the thing: not all lamps are created equal. Some have “striping” or weird wattage drops across the tube. We see this all the time with cheap filaments or lamps that are just plain worn out. You need a lamp that delivers a steady, tight heat field. When the heat is uniform, every single millimeter of that gasket hits the right temperature at the exact same time. No gaps, no leaks. Why we swear by ceramic end caps Then there are the mounts. Standard holders often leak heat or just give up when things get hot. We use ceramic end caps because they don’t warp or melt like plastic does. They keep the electrical connection rock solid and stop heat from bleeding into the machine frame. Instead, all that energy goes exactly where it belongs: into the product. The balancing act Now, you might think, “I’ll just crank up the wattage to seal them faster.” Be careful with that. If you push it too hard, you risk scorching your product or popping the filament. It’s a bit of a balancing act between your heat density and how fast your line is moving. And a quick tip: if you do ramp up the power, keep an eye on your cooling fans. High-output tubes put off a ton of ambient heat. If your airflow isn’t up to the task, you’ll start tripping sensors and shutting down the line. Switching to high-uniformity lamps and ceramic seals is a simple swap. It just works. You stop throwing away scrap and start getting a consistent weld every single time.