Replacement lamp for SIG blow molding

Mon, 20 Jul 2026 10:52:50 +0800

Getting Your PET Blow Molding Lamps Right

If you’re running a PET blow molding line—whether it’s a SIG system or something else—you know the drill. You rely on shortwave IR lamps to get those preforms soft and ready. But when a lamp finally burns out, the last thing you want is a project. You don’t want to be rewiring the oven or hacking away at the frame just to get back up and running. You just want a lamp that drops in and works. It’s all about the heat. We make sure our lamps hit the exact wattage and voltage your machine expects. Now, this isn’t just about getting the light to turn on. It’s about heat flux. If the voltage is slightly off, you’ll start seeing uneven heating. That’s where the trouble starts—you end up with bottles that have wonky wall thickness. To stop that from happening, we keep a really tight grip on the filament length and coil density. It keeps the heat steady across the whole tube, so your bottles come out consistent every single time. The nitty-gritty stuff We use high-purity quartz glass because these things take a beating with the constant heating and cooling. As for the fit? We stick to the industry standards, like R7s or SK15 connectors. It means you can just swap the lamp out without messing with your wiring harness or lamp holders. Simple. For those of you running SIG setups, we’ve got coated quartz options. These basically “tune” the IR emission to match PET resin perfectly. It stops energy from going to waste and keeps your machine frame from getting way too hot. One thing to watch out for… High-wattage lamps are great for when you need to ramp up production speed. They’re fast. But there’s a catch. Pushing all that power through a short tube puts a lot of stress on your oven’s cooling fans. If your vents are dusty or your airflow is weak, those high-output lamps can actually overheat your reflectors. Keep your airflow clean. It’s a small habit, but it’ll stop your filaments from burning out way too early.

SIG on China's Leading IR Heater Manufacturer

Replacement lamp for SIG blow molding

Getting Your PET Blow Molding Lamps Right