Giving Your SIG Blomax 4/6/8/10 a Second Wind
If you’re running an older Blomax machine, you know the struggle. You start seeing those annoying wall thickness variations, and suddenly you’re tossing way too much PET in the scrap bin. Most of the time, the culprit is the heating oven. It’s the heart of the whole operation, and when it gets tired, everything slows down. But here’s the thing: you don’t actually need to shell out for a brand-new machine. You can get your output back up just by swapping those worn-out lamps for high-density infrared ones. The secret is all in the heat density. Think of it this way: when you put in a precision-spec’d infrared tube, you’re changing how the energy actually hits the preform. We look closely at the wattage-to-length ratio. By packing more wattage into a smaller space, you get a much stronger heat flux. The preform hits the right temperature faster. And when that happens? You can finally push your machine speed back up. Let’s talk hardware. These aren’t just basic bulbs. They use quartz glass and halogen gas to keep things stable while they’re screaming hot. We use specific connectors—usually R7s or Sk15—because a snug fit is everything. If a connection is loose, you get resistance. That leads to arcing, and before you know it, your lamp is burnt out. The real magic, though, is the coating on the quartz. It shifts the energy so it matches exactly what PET likes to absorb. Instead of just heating up the air inside the oven, the heat actually sinks into the plastic. Getting them installed The best part? These are drop-in replacements. No need to tear apart your electrical cabinet or rewire everything. You just pull the old tubes out and slide the new ones in. Simple. One quick heads-up, though. When you crank up the heat density to hit those faster cycle times, your oven’s ventilation has to work harder. Before you go full throttle, double-check your cooling fans. If the oven can’t breathe and shed that extra ambient heat, you might risk damaging the sockets or overheating the machine frame. Just a little bit of housekeeping makes a huge difference.