Getting the Heat Right: Sidel Matrix & SIG Blomax Lamp Replacements
When it comes to PET blow molding, “close enough” usually isn’t good enough. If your heat profile is off by even a tiny bit, you start seeing those annoying thin walls or that cloudy, pearlescent look in your bottles. It’s a headache you just don’t need. That’s why we spent so much time on our replacement lamps for the Sidel Matrix and SIG Blomax (4/6/8/10 series). We wanted them to mirror the original heating curves exactly.
The “Secret Sauce” of the Heat
Most people think matching the wattage is the whole story. It isn’t. If the filament diameter is off by a few microns, the way the lamp emits heat changes. That shifts how deep the heat actually sinks into the PET preform. We spent a lot of time benchmarking the original Sidel lamps—looking at the physical footprint and the voltage-to-wattage ratio—to make sure the thermal load stays the same. The best part? You don’t have to mess around with your oven profiles or tweak your conveyor speeds. You just pop them in and get back to work.
No Messy Installations
We kept the hardware simple. High-purity quartz glass, a specific halogen cycle to stop the filaments from burning out, and standard R7s or Sk15 connectors. They’re true drop-in replacements. No weird wiring. No hunting for adapter brackets. One detail we obsessed over was the coating on the quartz. We calibrated the reflective layer so the infrared energy pushes forward into the preform, instead of leaking back into the oven housing. It’s a small detail, but it makes a huge difference in efficiency.
A Quick Word of Advice
Here’s the thing: high-wattage shortwave lamps put out a massive amount of heat. That puts a lot of stress on your power supply and cranks up the temperature inside the oven. If your cooling fans are clogged or your vents are blocked, these lamps are going to run hotter than they should. And when they run too hot, the filaments die faster. Keep your airflow clean. It’s the easiest way to make sure your tubes actually last as long as they’re supposed to.