Glass container inspection heater

Tue, 21 Jul 2026 04:17:52 +0800

Getting IR Heating Right for Silk-Screened Glass

Here is the struggle when you’re trying to temper silk-screened glass: you’re fighting a war on two fronts. You need enough heat to make that ink fuse perfectly so the pattern looks sharp, but if you get too aggressive with the heat in one spot, the glass just snaps. It’s a delicate balance. That’s why we lean on short-wave infrared (IR) lamps to get the job done. The trick is in the heat soak. You want the heat to hit fast and stay uniform. Short-wave IR is great because it sinks right into the glass. It stops that annoying “skin effect” where the outside is scorching but the middle is still cold. But you have to be careful with how you space your lamps and set the wattage. If you cram too many lamps in there, you’ll start blistering the ink. Too few? The glass keeps all that internal stress, and you’ll see it fail the second it hits inspection. Not a great look. The gear that actually works. We usually go with quartz halogen tubes. They can take the heat without warping or giving up on you. The real math comes down to your conveyor speed and how many kW you need per meter. If you’re dealing with thick-walled containers, you need some serious punch. Just a heads-up: make sure your power supplies can handle the initial surge when those lamps kick on, or you’re going to have a bad day. Speed vs. Stress Everyone wants the line to move faster. More throughput, more money. But rushing the ramp-up time is risky. If the inked areas and the clear glass expand at different rates, you’re asking for trouble. You have to tune the intensity just right. And if you really push the speed, your cooling fans need to be exactly where they belong. You need to “snap-cool” the glass to lock everything in without creating new stress points. It’s a tiny window of success. The best way to handle this? Wire everything into a PID controller. It lets you tweak the temp on the fly based on how thick the glass is or how much ink you’ve laid down. It keeps the patterns crisp and the glass strong. Simple as that.

Inspection on Infrared Quartz Heating Lamps

Glass container inspection heater

Getting IR Heating Right for Silk-Screened Glass