Troubleshooting PET blowing IR heater

Sun, 28 Jun 2026 05:07:51 +0800

Out on the blow molding floor, an IR heater drifting out of spec doesn’t throw a fit. It just quietly pushes preforms into the wrong temperature window, and the next thing you know you’re staring at haze, uneven wall thickness, and bottles that look off. Then the line slows, and you spend hours chasing symptoms instead of the real culprit.

What actually matters on the heater side

IR heaters for PET aren’t interchangeable, period. Halogen and quartz short-wave emitters give you fast response, but their output is sensitive—spacing, reflector condition, and lamp aging all move the needle. Medium-wave and NIR carbon fiber emitters have a broader, more forgiving profile, but you still need tight control over power density and spectral output. We match watt density, filament geometry, and voltage to the OEM heating tunnel—Sidel, Krones, SIPA, Husky, SACMI, and Nissei ASB—so the preform sees the same heat flux the machine was designed for. The practical specs that matter: 220–240 V or 380–480 V supply, quartz or ceramic sockets, R7s or proprietary connectors, and exact length plus focal distance. Our emitters are engineered to hold output within ±2% over the life window, and we back it with measured data, not marketing.

Troubleshooting on Factory Direct Infrared Heaters

Troubleshooting PET blowing IR heater

What actually matters on the heater side