Stop Fighting Your SIG Blomax 4 Heating Zones
If you’ve spent any time running a SIPA rotary machine, you know the headache of uneven preform heating. One lamp is a bit too hot, another is lagging, and suddenly your bottle walls are all over the place. It’s frustrating. You end up with skewed geometry and a lot of wasted plastic. We built our replacement lamps for the Blomax 4 to fix exactly that. They aren’t “close enough”—they are a direct 1:1 match for the OEM power specs. The secret is in the stability. Usually, when you swap in a generic lamp, there’s a tiny difference in electrical resistance. It doesn’t sound like much, but it shifts the heat output. That’s why you find yourself constantly tweaking machine settings just to get a consistent bottle. We spec our tubes to hit the exact wattage the Blomax 4 expects. The heat density stays uniform across the whole oven bank. You just pop the new tube in and get back to work. No fiddling. No guessing. Built for the grind. These aren’t flimsy. We use high-purity quartz glass because these things take a beating with rapid heating and cooling cycles. We also use a halogen gas fill to keep the filament from burning out too fast, so they actually last under heavy loads. As for the fit? They use standard R7s or Sk15 connectors. Depending on how old your machine is, it’ll just slide right in. No custom adapters. No modifying the sockets. It just works. A quick tip from the field. These lamps pump out the shortwave IR energy you need to penetrate PET fast. But here’s the thing: if your reflection chambers are charred or covered in dust, it doesn’t matter how powerful the lamp is. The heat just won’t hit the plastic. Keep those reflectors clean. And while you’re at it, double-check your cooling fans. When July hits and the plant gets hot, you don’t want your sockets overheating during a peak production run.