Some customers who use hot runner heater always ask us questions: How do coil heater distinguish between good and bad? How does the coil heater distinguish the quality? How to verify high quality coil heater?
The most intuitive way to distinguish the micro coil heater is to clean the surface of the coil heater first, then turn on the AC 220V power supply, dry it in the air, turn off the surface after it turns red, and wait until the hot coil heater is completely cooled, then wipe it with a napkin. There should be no black oxidized powder on the white paper (not reacted with oxygen in the air), which is described as a high-quality coil heater. The good or bad of the coil tubular heater is related to the normal operation of the entire industry. Therefore, be careful when testing hot runner coil heater.
What are the basic characteristics of a good coil heater? 1. The electrical performance of the coil heater is normal. After the carbon fiber quartz electric heater is energized, during frequent start-up, shutdown and long-term continuous operation, the power is stable within a certain tolerance range and will not be generated. Any instantaneous power impact. 2. The high thermal conversion rate is the most critical place for hot runner heater. High thermal efficiency, more than 30% energy saving than general metal heating body, and extremely fast heating rate. Carbon fiber heating element is a pure black body material, so it has rapid heating, small thermal hysteresis, uniform heating, long distance of heat radiation transmission, fast heat exchange rate, etc. Features. During the working process, the luminous flux is much smaller than that of the metal heating element, and the electrothermal conversion efficiency is as high as 95% or more (that is, you use 1000w of ordinary coil heater and only 700w when using carbon fiber electric heater).