Getting the Moisture Out of Milk Powder Cans
Here’s the deal: if there’s even a tiny bit of moisture left on the sealing rim of a milk powder can, you’ve got a problem. When that water gets trapped during crimping, it’s basically an open invitation for bacteria to move in or for the powder to spoil way too early. To stop that from happening, we use infrared (IR) preheaters to flash-dry the rim right before the can hits the seamer.
How the heat actually works
We use short-wave IR lamps because they don’t mess around. They dive straight through the metal and any leftover liquid instantly. Think about a standard convection oven—it heats everything, which is a waste. IR is different. It targets just the sealing rim, making water molecules vibrate and vanish in milliseconds. The result? A bone-dry seal, but the powder inside stays cool and untouched.
Keeping things clean
Old-school heating elements can be a nightmare. They collect dust or start flaking off coatings over time, and the last thing you want in a food plant is random debris. Our lamps are tucked away inside high-purity quartz. Since nothing actually touches the can, you don’t have to worry about scratches, mechanical wear, or grease getting where it shouldn’t be. It just keeps the whole line clean.
The tricky part (The Engineering)
Now, these lamps pack a serious punch. Because the heat is so intense, your conveyor speed has to be spot on. If the cans crawl too slowly, you’ll scorch the product near the rim. Too fast? You’re leaving moisture behind. To get it right, we plug in a PID controller and a thermocouple. It keeps the surface temperature in a tight 5°C window so you aren’t guessing. And please, don’t skip the shielding. Without it, that radiant heat bleeds everywhere. It can warp your sensors or make the workspace miserable for whoever is running the line. One last tip: wire it with a dedicated high-temp circuit. You don’t want voltage drops causing some lamps to run colder than others. Consistency is everything here.