Dog House Heater: The Halogen Tube That Keeps Your PET Blow Molding Humming
We built this dog house heater to be a straight swap for the halogen tube in your PET blow molding machine. Its whole job is to handle the intense heat right where the parison enters—fast, focused energy that keeps the polymer flowing smoothly, without scorching the frame around it.
What it brings to the shop floor
This one runs at 2500W on 400V, so you’ve got the muscle for big parisons and long cycles. The 300mm heating length lines up with standard dog house setups, so you get even heat across the critical zone—no messing with mounting or rework. And because it’s high voltage, the current stays low. That means less voltage drop on those long feed lines, and a steadier temperature right where you need it: at the heater face.
Built to take the heat
Inside, you’ve got a quartz envelope with halogen fill gas. It’s chosen for stable output and the ability to handle sudden temperature swings without cracking. A reflective coating pushes infrared energy forward, so more heat goes into the parison—and less is wasted heating up the machine itself. And the R7s connector? It locks in clean, with low resistance, so you can install it quickly even in tight dog house cavities.
Why this matters when the clock is running
In PET blow molding, the dog house heater has to deliver heat that’s both fast and repeatable. That’s what keeps parison sag from creeping in and keeps melt consistency where it needs to be. With this setup, you get serious heat density in a compact footprint, and the R7s connection makes replacement straightforward when it’s time for a new tube. Just keep in mind: at 2500W, you’re dealing with real power. Make sure your machine’s cooling and airflow are up to the task, so the heater and nearby components stay in a safe, reliable temperature range.