R7S halogen heating lamp for blowing machine

May 3, 2026

Introduction

Let’s cut to the chase. We built the R7S halogen heating lamp for one reason: blowing machines. You know the drill. You need a heat source that’s small, starts up in a flash, and stays rock-solid steady. This isn’t some off-the-shelf bulb you grab from the hardware store. This is a purpose-built heater, designed to squeeze into those tight corners on your preform heating and parison control.

The Power, Voltage, and Size Breakdown

Here’s the thing about blowing machines—they need a lot of heat packed into a tiny space. So we packed these lamps with high wattage, all in a short length. It’s pretty straightforward physics, really. A shorter quartz tube concentrates all that energy into a smaller surface area. The result? You get a lamp that warms up faster and delivers more wattage per inch. Choosing the right voltage is key, because it has to play nice with your machine’s control panel and transformer.

Go with the high-voltage version (usually 400V), and you get lower current for the same wattage. That means you can use smaller wiring and lose less power in the lines.
Choose a lower voltage (like 230V), and you’re looking at a simpler setup if your machine is already designed for a lower supply. We match the wattage and length to the heating zone. The goal is simple: enough power to hit your target temperature fast, but not so much that you overheat the preform neck or fry the parts nearby.

What’s Inside: Halogen, Quartz, and the R7S Fit

The magic happens with the halogen cycle. It keeps the quartz envelope clean by sending tungsten back to the filament. This keeps the output stable and gives the lamp a much longer life than a standard incandescent. And the quartz tube itself? It’s tough. It handles the shock of rapid on-off cycling and stays strong at high temperatures without softening. Many of these lamps use a reflector coating to focus the infrared energy forward. That means more of the heat goes right where you need it—on the preform—and less is wasted heating up the fixture. It also helps even out the temperature across the whole heating zone. Then there’s the R7S connector. It’s a no-fuss, two-contact design that locks in place and handles high current safely. It slides right into your existing ceramic holders, so you can swap out a lamp in seconds without any rewiring.

Why It Works So Well in Blow Molding

On a PET blowing line, this lamp heats preforms lightning-fast. That keeps your stretch ratio consistent and your cycle times short. The focused infrared output gives you precise control over the parison temperature, which cuts down on thin spots, stress lines, and rejects. Now, because the lamp is compact and runs hot, it has a small footprint. But that also means your machine has to be ready to handle the heat. Plan on a little more ambient heat around the lamp, and make sure you’ve got proper cooling and shielding in place. For the engineers out there, the payoff is peace of mind. You get reliable, repeatable heating in a package that’s simple to maintain. The output stays stable over time, you can change the lamp quickly thanks to the R7S connector, and you know exactly what you’re going to get within the blowing machine’s heating window.