Getting Your Krones Contiform S Back Up to Speed
If you’re running an older Krones Contiform S, you’ve probably noticed things slowing down. The throughput isn’t what it used to be. It’s easy to just shrug and say, “Well, the machine is old,” but that’s usually not the real story. More often than not, the culprit is your IR lamps. They wear out. They lose their punch. When those lamps can’t move heat into the plastic efficiently, your whole production line feels the drag. The good news? Swapping out those tired tubes for precision-spec’d elements can actually bring your speed back.
The Trick to Heat Density
Here is the thing about the Contiform S: it relies on short-wave infrared. To get a PET preform to that “sweet spot” where it’s ready to blow, you need a lot of power, and you need it fast. But you can’t just throw any lamp in there. The voltage and wattage have to be a perfect match for your power supply. If they’re off, you’re looking at uneven heating or, worse, lamps that burn out way too soon. Now, high-wattage tubes are great for faster cycles. But there’s a catch. More heat means more stress on your oven’s ventilation. If your cooling fans are choked with dust, those high-output lamps will cook your lamp holders.Keep your fans clean, or you’re just trading one problem for another.
Making Sure it Actually Fits
We use heavy-wall quartz glass because it can take the hit of rapid heating and cooling without cracking. Most of these use R7s or Sk15 connectors, which is great news for you. They’re basically drop-in replacements. You just slide them into the sockets. No rewiring, no headaches. Some of our lamps also have a special coating. This isn’t just for show—it shifts the emission spectrum so the heat actually penetrates the plastic wall instead of just scorching the surface. It stops that annoying “pearlescence” where the outside looks burnt but the core is still cold.
What This Actually Does for Your Day
When your lamps are degraded, you get “cold spots” in the oven. It’s frustrating. You end up slowing the whole machine down just to make sure every single bottle is actually blowable. Fresh lamps fix that. They give you a uniform heat profile across the board. And that’s where the magic happens. You can finally crank the speed back up without watching your scrap rate climb. It just works.