Why We Chose 2000W: The Sweet Spot for PET Heating
We built the Krones Contiform heater bulb around 2000W for one simple reason: it’s the sweet spot for PET preforms. You get enough heat density to melt the material fast—without risking scorched neck finishes. And here’s the best part: it runs on standard 400V industrial lines. No rewiring. No step-down transformers. Just a clean, drop-in replacement that keeps your heating window tight and repeatable.
Inside the Bulb: Shortwave Infrared, Quartz, and the R7s Connector
At the heart is a shortwave infrared element, sealed inside a quartz envelope. Quartz handles rapid heating and cooling without cracking, so you can run fast cycles without sweating premature burnout. The coating is tuned to focus the spectrum right where you need it—on the preform surface. That means you’re heating the plastic directly, not wasting energy warming the air around it. And the R7s connector? It’s a workhorse. Solid contact. Easy replacement. Wire it up, lock it in, and you’re back in production.
A Upgrade That Doesn’t Turn Your Machine Into a Project
This setup is for blow molding machines that need more output—without taking up more space. Swap in a 2000W infrared heater, and you can boost throughput without replacing the entire heating section. Installation is straightforward: pull the old bulb, pop in the new one, and recalibrate the zone settings. Done.
Keep It Cool: The Reality Check
Here’s the thing: higher wattage means more heat in the cabinet. So your cooling—fans, airflow, and ambient control—needs to be up to the job. If the enclosure runs hot, the bulb runs hotter, and its life drops. Do a quick thermal review alongside the upgrade, and you get consistent heating, fewer line stops, and maintenance you can actually plan around.