Fixing Those Annoying Heat Spots in Your KHS Blow Molding
Ever pull a batch of PET bottles off the line and realize the walls are uneven? Or maybe some are deformed, while others have those frustrating cold spots or an overheated center. It’s a headache. Usually, it comes down to one thing: your IR lamps aren’t putting out heat evenly.
Let’s talk about the heat
Getting a perfectly flat thermal profile across a preform is harder than it looks. It all depends on where that tungsten filament sits and how pure the quartz tube actually is. If your lamp has internal hotspots, you’ll see “striping” on your bottles. It looks bad and ruins the batch. We handle this by using high-grade quartz glass. It doesn’t soak up the heat itself; instead, it pushes that short-wave radiation straight into the PET resin where it belongs.
Swapping them out
These are designed to be simple drop-in replacements. No need to rewire your whole setup or modify the chassis. We’ve obsessed over the wattage and voltage so you don’t have to worry about blowing a fuse or overloading your power supply. You just plug them in and get back to work. One quick tip: keep an eye on your airflow. If dust builds up on the tubes, it creates little heat traps. That’s how quartz cracks. Plus, keep those reflectors sparkling clean so the heat actually hits the target.
Why this actually matters
If you’ve been using cheap, generic tubes, you’ve probably noticed a “dip” in temperature. It’s a pain because you spend half your shift tweaking oven settings just to keep things consistent. Our lamps fix that. You get a steady, reliable heat field from end to end. The result? You stop fighting the machine. Your scrap rate drops. It’s a simple hardware swap that solves a really annoying thermal problem.