Getting Heat to the Core of Your PET Preforms
If you’re running high-speed lines like a SIPA SFR 12 or a Husky HyPET, you already know the headache: heat penetration. It’s the classic bottleneck. When that infrared energy just bounces off the surface instead of hitting the core, you end up with pearlescence and walls that are way too uneven. It’s frustrating. That’s why we built our replacement lamps differently. We shifted the spectral output to actually match how PET absorbs heat. The science of “hitting the mark” Most standard lamps waste a ton of energy on wavelengths that the plastic simply reflects. It’s like trying to heat a room with a mirror. We use a specific halogen mix and a precise quartz thickness to push more short-wave IR deep into the material. The result? You get a faster heat-up cycle, but without scorching the outer skin. And if you’re looking to shave a few seconds off your cycle with high-wattage setups, we’ve got you covered. Our lamps are spec’d to handle those heavy voltage loads so the filament stays stable, even when you’re power cycling rapidly. Just a heads-up: if you crank the wattage, make sure your oven’s forced-air cooling is actually doing its job. Otherwise, you’re just asking for the lamp ends to burn out. Built for the real world These are simple drop-in replacements. No fuss. Depending on your oven, we use R7s or Sk15 terminals to make sure the electrical connection is tight. You don’t want a loose fit—that’s how you get arcing and fried sockets. We also reinforced the quartz envelope. Rotary systems vibrate like crazy, and thin-walled glass just can’t take that kind of beating or the thermal shock. Ours can. What this looks like on the floor You’ll notice it immediately in your temperature profile. By forcing the heat deeper, the gap between the inner and outer wall temperatures shrinks. That means fewer rejects. It means a blowing process that actually stays stable. One last tip: keep your reflectors clean. A layer of dust will kill the gain of even the best lamp on the market. Keep them shiny, and the lamps will do the rest.