Getting Your Heat Right: Replacement Lamps for SIG Blomax 4 and Krones Contiform
Let’s be honest: keeping a consistent heat profile in a PET blowing machine is a headache. Whether you’re running a SIG Blomax 4 or a Krones Contiform, it all comes down to how much heat you’re hitting those preforms with and how precise that wavelength is. And we all know the drill—OEM lamp prices can be a joke. You need a replacement that actually works, fits right in, and doesn’t ruin your plastic. The Deal with Power and Heat These machines use short-wave infrared (SWIR) to flash-heat the PET. It’s fast. It has to be. We build our lamps to match your oven’s voltage and wattage exactly because, in this game, the little things matter. If your wattage is off by even 5%, you’re going to start seeing “pearling” or weird, uneven walls in your bottles. It’s frustrating. Also, keep an eye on your power supplies. If you’ve got voltage spikes jumping around, you’re just burning out your filaments for no reason. Quartz and the Nitty-Gritty Details We use high-purity quartz glass here. Why? Because these lamps go from cold to scorching in a heartbeat, and cheap glass just can’t handle that kind of thermal shock. Most of these use R7s or Sk15 connectors. They’re standard, sure, but the fit has to be tight. A loose connection creates resistance, which leads to overheating at the terminals. Before you know it, you’re replacing the whole socket. Plus, some of our versions have a special coating. It helps push the heat into the preform instead of just warming up the oven walls. Keeping Things Running The best part? These are direct swaps. You don’t need to spend your weekend rewiring the oven. Just pop out the dead tubes, slide these in, and tweak your heat zones. But here is a pro tip: if you’re pushing your lamps to the limit, your cooling blowers are working overtime. If your vents are clogged with dust, the ambient heat will kill your lamps way faster than they should die. One last thing—**keep the quartz clean.**Seriously. A single fingerprint or a smudge of oil creates a hot spot on the glass. That’s how you get a cracked tube. Keep them spotless, and they’ll last.