Why the Big Players Stick With Our Infrared Heating Bulb
Here’s the truth: we make the heating bulb that SIPA and other top-tier blow molding OEMs choose as their standard. This isn’t just some off-the-shelf heat source. It’s a purpose-built, shortwave infrared halogen tube—designed from the ground up to deliver precise, repeatable heat for PET bottle preforms. When your line is running around the clock, the lamp needs to fire instantly, hold steady temperature, and handle the daily grind of heating up and cooling down. That’s exactly what our design does.
Let’s Talk Power, Voltage, and Size
We pack 2500W of power into a 400V, 300mm tube. Why does that matter? It gives you serious heat density in a small footprint, so you can focus the energy right where the preform needs it. Going with 400V also means less current draw compared to lower-voltage options. That keeps your wiring simpler and cuts down on energy loss. And the 300mm length? It’s not random. It’s tuned to match the heating zone of standard SIPA blow molding heads. You get even coverage without overheating the neck, which keeps cycles tight and prevents crystallization. Just a heads-up: 2500W is a lot of power. Make sure your machine’s cooling system is up for it. If it’s not, you’ll end up shortening the life of other components.
Built to Last: Materials and Connectors
We use a quartz envelope with halogen fill gas. The halogen chemistry keeps the filament stable, even at extreme temperatures. That means no blackening and consistent output for thousands of hours. Plus, the shortwave spectrum is tuned to what PET actually absorbs. So the energy goes straight into the preform, not wasted heating the air around it. For the connector, we use R7s—a double-ended, pin-based interface built for industrial work. It handles high current, locks in alignment, and makes swapping bulbs a breeze. We also offer a Sk15 termination option for specific setups, so it fits right into your existing tooling.
How It Performs in SIPA Blow Molding
On a SIPA line, the heating bulb has to hit temperature fast—and hold it steady, shot after shot. Our 2500W halogen tube warms up quickly, giving you short warm-up times and stable heating curves. The payoff? Predictable stretch ratios, consistent wall thickness, and far fewer scrap parts. This lamp is built for the shop floor. It handles vibration, thermal shock, and the rough environment around the blow station. When you wire it in, you get a tough, serviceable component that works cleanly with your machine and keeps your uptime where it needs to be.