On the blow molding line, neck crystallization is where a tiny temperature drift turns into real trouble—flash, stress marks, and off-spec bottles that eat into yield. We built a focused IR lamp for preform necks to lock in that narrow heat window and hold it there, shift after shift.
What matters under the hood
We run a short-wave halogen IR emitter inside a quartz tube, chosen for fast response and tight spot control. The filament geometry concentrates energy right on the neck ring area, so you don’t spill heat onto the body. Output is matched to the OEM heating tunnel power budget, which means you can swap in one lamp without re-tuning the whole zone. Connection is standard R7s, and we offer multiple lengths and voltages (240V/480V) to fit Sidel, Krones, SIPA, Husky, SACMI, and Nissei ASB blow molders. You get rapid warm-up, repeatable temperature, and consistent emissivity across the life of the lamp.
Why it sticks in practice
The focused beam hits the preform neck where crystallization has to happen fast and even. That precision keeps the body from overheating, which can lead to thinning and weak spots, and it helps you hold tolerances on heavier or asymmetric neck designs. On the floor, that translates to fewer rejects from neck defects, more stable heating profiles when you switch colors or materials, and less downtime chasing drift. Energy use drops because the heat goes where it needs to go, not all over the tunnel.
The details that save you headaches
Installation is straightforward, but alignment is critical. Mis-position the lamp by even a few millimeters and you’ll see uneven heating and the lamp will cook itself early. Before changeover, confirm your reflector geometry and mounting hardware, and double-check the lamp wattage against your PID settings to avoid overshoot. Operating life depends on voltage stability and ambient temperature—run in a high-heat tunnel, and plan for scheduled inspections. Keep spare reflectors on hand.