PC preform softening lamp factory wholesale

Tue, 14 Jul 2026 10:05:12 +0800

Fixing Those Annoying Heat Spots in Your KHS Blow Molding Lines

Ever pull a batch of PC or PET preforms and see those weird pearlescent streaks or thin walls? It’s frustrating. Usually, it comes down to one thing: your heating is uneven. Most of the time, it’s because the lamps have just worn out or the heat isn’t actually hitting the preform where it needs to. You don’t necessarily need a whole new setup—sometimes just swapping out those OEM lamps for some precision-engineered domestic ones does the trick. Getting the wattage right Here’s the thing about getting a uniform soak: your lamp needs a consistent linear power density. If it’s off, you get “burn-in” zones at the ends. We build our tubes to match the exact voltage and wattage your KHS oven expects. We also obsess over the filament positioning. Why? Because you want the infrared radiation hitting the body of the preform, not cooking the neck. The science of the glass We use high-purity quartz so the glass doesn’t cloud up over time. Most of our softening lamps use short-wave infrared (SWIR) because it cuts through the plastic fast. If you’re dealing with high-viscosity PC preforms, the spectral peak has to line up with how the material absorbs heat. We can even do coated options to bounce the heat back toward the preform. Just a heads-up: those coated tubes run hotter on the surface. Make sure your oven’s airflow can handle it so you don’t warp your lamp holders. Easy swaps You won’t need to rewire your whole machine. These are direct drop-in replacements. We use standard R7s or SK15 connectors, so they just plug right in. The real win here is matching the thermal profile to your specific preform weight. If your cycle times feel sluggish, your lamps are probably just underperforming. When you tighten up those wattage specs, you can push the machine faster without worrying about ruining the material. It’s a simpler way to stop wasting energy.

Softening on Infrared Heat Incorporated

PC preform softening lamp factory wholesale

Fixing Those Annoying Heat Spots in Your KHS Blow Molding Lines