Dealing with Heat Issues in the SIG Blomax 4/6/8/10
If you’ve spent any time with KHS/SIG Blomax blow molders, you know the headache of uneven heating. One minute everything is fine, and the next, you’re staring at bottles with weird wall thickness or deformation. Usually, you’re stuck between two bad options. You either pay a fortune for OEM parts, or you gamble on cheap generics that burn out in a few weeks. It’s frustrating. That’s why we built a replacement lamp that actually fits the thermal footprint of the Blomax series. No guesswork, just a part that works.
Getting the heat right
Standard quartz tubes have a nasty habit of leaving “cold spots” at the ends. It’s a common flaw. We fixed this by using a specialized halogen cycle and winding the filaments with a lot more precision. We tightened the tolerances on where those filaments sit. The result? No more random thermal spikes. You won’t have to worry about your PET preforms overheating or getting those annoying “pearls.”
The nuts and bolts
These aren’t flimsy tubes. We used heavy-wall quartz glass because these things take a beating during rapid cycling. Even the connectors are beefed up to ensure a tight fit. No loose contacts, no arcing at the terminals—just a solid connection. They drop right into the Blomax 4, 6, 8, and 10 platforms. One quick tip: these lamps push a lot of power into a small space.**Make sure your oven ventilation is clear.**If your cooling fans are clogged with dust, the heat will build up and kill the lamp early, no matter how good the glass is.
How it actually feels on the floor
The best part is that you can stop obsessing over oven tuning. You get a heat profile that stays steady across the whole preform. Fewer rejects. Faster changeovers. Less stress. We’ve seen these hold up in 24/7 production environments where the hardware is pushed to the absolute limit. They just keep humming along.