Getting Your Sidel Matrix Heating Just Right
Here is the problem when you swap out IR lamps in a Sidel Matrix blow molder: if the new lamps don’t match the old ones perfectly, your heating curve shifts. It sounds like a small detail, but it’s a headache. If the wattage or spectral output is even slightly off, your PET preforms won’t heat up evenly. You end up with bottles that have thin walls in some spots or that annoying “pearlescence” look. Nobody wants to see that on a finished product. It’s more than just wattage We don’t just look at the watts and call it a day. We obsess over the voltage-to-length ratio. Think of it as power density. Your Sidel machine expects a very specific amount of heat (Watts per mm) to hit the preform. If the voltage is off by a hair, you’re stuck. Either the lamp isn’t hot enough, or it burns out way too fast. We match the resistance and filament geometry so your temperature ramp-up feels exactly like the original factory setup. The glass and the “invisible” stuff We use high-purity quartz because these lamps go through a lot of thermal shock. They heat up and cool down fast, and cheap glass just can’t handle that. Then there’s the coating. Depending on your Matrix setup, we tweak the infrared emission. Shortwave IR digs deep into the PET, while medium-wave hits the surface. If you use the wrong one, you’ll spend your whole afternoon tweaking oven settings, only to realize the core of the preform is still cold. Plus, we use standard R7s or Sk15 connectors. You just pop them in. No rewiring, no fuss. One quick tip on airflow These high-density lamps put out a ton of heat, which means your oven’s ventilation has to work hard. If your cooling blowers are clogged with dust or starting to fail, the lamps will actually bake the surrounding reflectors. That kills the quartz envelope a lot faster than it should. Keep your airflow clean, and your tubes will last much longer. Simple as that.