Getting the Heat Right for PET Preforms
When you’re running high-speed PET blowing, raw power isn’t everything. If you just crank up the wattage, you’ll end up scorching the outside of the preform while the core stays cold. That’s a recipe for disaster. For those of you running SIG Blomax 4 or Husky HyPET systems, the secret is shortwave infrared. It’s all about penetration. We want that heat to dive deep into the material so the core hits the right plasticity without ruining the outer wall. The nitty-gritty on voltage and density We built these replacement lamps to survive the brutal cycle times of high-output lines. By dialing in the voltage and wattage, we’ve boosted the radiant flux density. What does that actually mean for you? It means the heat doesn’t just sit on the surface. It pushes through. You get faster warm-ups and bottles with a much more consistent wall thickness. No more guessing. Quartz and coatings (the stuff that matters) We use high-purity quartz because, frankly, cheap glass burns out too fast under this kind of stress. There’s an internal halogen cycle that keeps the filament clean, which means the lamps last longer even when you’re pushing them to the limit. Plus, we added specific coatings to shift the emission spectrum. It’s like tuning a radio—we’re targeting the exact absorption bands of PET to make the heating more efficient. One quick tip: if you’re swapping these into an old oven,clean your connectors. A loose fit at the terminal causes arcing, and that’ll kill your lamp instantly. Fitting them in These are simple drop-in replacements. They have the exact same footprint as the OEM lamps, so they slide right into your existing mounts. No need to hack away at your oven housing or spend hours on a workaround. But here’s the thing… if you run these at max output to shave a few seconds off your cycle, you’re pumping a lot more heat into the cabinet. Keep an eye on your cooling blowers. You need to make sure your cooling system can handle that extra ambient heat, or you might start overheating the electronics nearby.