Laser cutting support heater

Mon, 20 Jul 2026 09:56:39 +0800

Dealing with those annoying cold spots in your glassware

Ever pull a piece of complex glassware out of the kiln only to find it cracked? It’s frustrating. Most of the time, it happens because of “dead zones”—those stubborn spots where the heat just doesn’t reach. Standard kilns usually rely on moving air or heating elements, but if your piece has weird curves or deep pockets, the heat can’t always get in there. You end up with uneven stress in the glass, and well, you know how that ends. We’ve found a better way. We use shortwave infrared (IR) lamps to blast radiant energy exactly where it needs to go, penetrating the shape of the glass rather than just heating the air around it. Why IR beats hot air Think of convection like a breeze. Air is lazy; it misses the tight corners and the deep recesses of a complex vessel. IR is different. It travels in a straight line until it hits the glass. By setting these lamps up in a multi-angle array, we can aim the heat directly into those dead zones. We use high-heat density lamps so the glass hits its annealing point quickly, without turning your entire kiln into a meltdown. Getting the setup right You can’t just throw one lamp in there and call it a day. To really cover a complex shape, you need a staggered layout. This creates a sort of “heat blanket” where the radiation fields overlap. But you have to be careful with the wattage. If you’re working with thick-walled glass, you need that extra punch. Just keep an eye on your power supply. If you cram too much wattage into a tiny space, you risk overheating a specific spot, which can warp your piece. It’s a balancing act. Keeping things running The good news is that these lamps usually drop right into most industrial setups without a fuss. We use quartz envelopes because they can handle the heat. One big tip:**Keep the quartz tubes spotless.**Seriously. A single fingerprint or a smudge of oil will burn right into the glass, and your tube will pop way sooner than it should. Also, double-check your wiring. Make sure it can handle the current draw. If you get a voltage drop, your thermal uniformity goes out the window, and you’re right back to square one with those cold spots.

Support on Warm IR Heating Zones

Laser cutting support heater

Dealing with those annoying cold spots in your glassware